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SHARP SERVICE MANUAL Personal Computer MZ-80K r DC 6 PS Ernst Helms Te!. O~534 / i441 SIE:ndamm 3 ~u3 1 Lasbek r !FEATURES ! • The MZ-80K is a full·fledged persona l microcomputer equipped with 8-bit microprocessor (2·80 ) and it can meet a variety of applications li ke hobbies, educat ions, office wor ks, controls (of apparatus In every industrial fie ld), etc . • It is a compact desk·top type, Itself a simplified unit including CPU board, CAT display, cassette -tape recorder and ke),) r. ~rd all togethc ~ . • Speaker (3 octaves) and c;ock function are bu i' t in . • Applicable Laguage, (BASIC, MACHINE LANGUAGE, ASSEMB L ER etc.) are changed eas ily wi t h variations of tape mode : a free se lection of t r,e m is possibl e acco rding to the pu rposes of use rs. • Memory extension is allo wed U!J to 48K I;ytes in the board. r SHARP CORPORATION MZ 80K ~------Contents---------.., Page Specifications . . . . . . . . . . . . . Precautions on Handling LSI's and IC's 3 Trouble shooting guide 4 CPU board section. . 5 Power supply section 12 Display section 17 '" Cassette tape recorder section 21 Keyboard section . . . . . 24 Circuit diagram of MZ·80K 25 Replacement Parts List 43 .. Caution in Service * Maintain the safety and protecting ability of the apparatus after service. * High voltage shall not be rised to excess voltage so as to prevent this apparatus from the extra X-ray radiation. MZ-80K SPECIFICATIONS • General • CPU Z-80 Clock Function: Built in Memory Monitor ROM; 4K bytes RAM; 20K bytes (dynamic RAM) Memory extension; 48K bytes (max.) Editor function Cursor control; "up", "down", "right", "left", "home", "cleary home" Edit key, Delete key Display 10" CRT (black/white). 8 x 8 dot matrix, Characters; 1000 (40 characters x 25 lines) Power supply AC 220V ±10%, 50 Hz AC 240V ±10%, 50 Hz (for UK) Power consumption Approx.45W Cassette Standard audio cassette tape Data transfer speed; 1200 bits/sec . Data transfer system; SHARP PWM Sound output Keys layout Temperature Operating temp.; O°C to 35°C Storage temp.; -15°C to 60°C 400mW (max.) Humidity Lower than 80° during operation Number; 78 keys ASC II standard (alphabet capital letter, figures). Small letter, Graphic Weight Approx. 13 kg Dimensions 410(W) x 270(H) x 470(D)mm Music function Built in Programmable counter 1 pc. Programmable peripheral interface 1 pc. Other ICs 53 pcs. • CPU Board Section (DCPU-0006PAZZ) CPU Z-80; 1 pc. ROM Monitor; 1 pcs. (4K bytes) Character generator; 1 pcs. (2K bytes) RAM Standard; 16K dynamic RAM; 8 pcs. (16K bytes) 4K dynamic RAM; 8 pcs. (4K bytes) Video RAM; 2 pcs. (1 K bytes) _. • Power Supply Section (DBOXD0004PAZZ), (DBOX0005PAZZ ----- for UK) Input AC 220V ±10%, 50Hz AC 240V ±10%, 50Hz (for UK) Output DC 12V, 1.6A max. DC 5V, 1.6A max. DC -5V, 0.2A max. -1- MZ 80K • Display Section (DUTT0004PAZZ) I. General specifications 11. Electrical specifications Video output 40Vp-p standard (35Vp-p limit) Resolution Horizontal Size 10" Frequency 60Hz (vertical), 15.75kHz (horizontal) 15.75kHz (horizontal) Power source DC 12V, 1.1A±10% Non-linearity distortion Horizontal; ±8% (±14% max.) Vertical; ±8% (±12% max.) Quick start type (3 sec.) 240NB4; 10"90° deflection explosion proof type Heater; 12V. 75mA Geometrical distortion Pincushion dist.; 1% (2% max.) Barrel dist.; 1% (2% max.) Trapezoidal dist.; 1% (2% max.) Parallelogram dist.; 1° (2.5° max.) IC 2 pcs. High voltage Transistor 5 pcs. Zero beam; 11.0kV (10.0kV, min., 12.0kV, max.) Diodes 9 pcs. Power supply DC12.0V, 1.05A O.2A max.) Working range 12V ±10% Sound output 400mW max. (400 Hz) Speaker Bcm, round dynamic type (32Q) Scan size Horizontal; 10% (15% max.) Vertical; 10% (15% max.) Picture tube Control knobs Working temperature Volume, V-Hold, Contrast, H-Hold, Brightness, Focus -lO°C to 50°C 11 These patterns must be clear-cut. Horizontal lock-in range ±300 Hz (±100Hz) Vertical lock-in range -12 Hz (-6 Hz limit) Audio fri4uency characteristic 400 Hz (OdB) -10dB ±4dB at 100 Hz -12dB ±4dB at 10kHz Sound maximum output 400mW at 400 Hz (350mW min.) • Cassette tape recorder Section (KTRC-0004PAZZ) System PWM recording Biasing DC system Power source 5V ±0.25V (rated) Erasing DC system Rated amperage Wait; 2mA Record; 70mA (TEAC test tape) Playback; 7mA (TEAC test tape) Playback sensitivity 1m sec. to 500J.L sec. (standard) Semiconductors 4 transistors 1 IC 4 diodes Applied tape From C30 to C120 Tape speed 4.75 cm/sec. Track 2-track monaural type Motor Electronic governor motor (12V) Input level Input impedance Output level Below O.4V ("L") Over 2.0V ("H") Over 10kn (record jack) Below O.4V ("L") Over 2.0V ("H") Working temperature -lO°C to 50°C Storage. temperature -25°C to 70°C * Specifications subject to change without prior notice. -2- • LSI's and IC's used in the MZ-80K are semiconductor integrated circuits whose basic element is MOS FET. The IC's, so poor in static electricity or leakage current from soldering tool, are liable to suffer breakdown. It is essential therefore to read the following instructions carefully and handle them properly. Cl) @ When inserting LSI's or IC.s, don't mistake their Ground your body before handling LSI's or IC's. Grounding must be made through a resistor of serveral Mohms for avoiding danger. Note that if possible, you wear cotton gloves and working clothes, but not chemical fiber ones easily charged with static electricity. inserting direction unconditionally. insertion damages them. Ground on water pipe or connect· to ground terminal. Reverse ® When storing and transporting an LSI or IC separately, wrap it with aluminum foil or insert into electroconductive sponge (Mos-Mat) to maintain terminals at the same potential. Electroconductive LS I storage sponge (Mos-Mat), or grounded aluminum foil or the like Method of working and handling LSI:s and IC's (2) When putting LSl's on a work bench during repair, (]) Storage temperature of LSI is -20 to +70°C, and that of IC -40 to +125°C. It is recommended, however, to store them at a temperature near room temperature if possible. Avoid storing them on a place extremely or low in humidity. lay grounded aluminum foil or the like superior in electric conductivity under them. hjh (~Use a grounded soldering tool free from leakage current. Even if current leaks out to the tip of soldering tool, gate insulation layer is protected by the action of protective doide. However, too much leakage current, which is caused by the tip in direct. contact with power supply, for instance, may break the protective diode itself. Therefore, never fail to use a soldering tool free from leakage current. A low-voltage soldering tool (6V, 12W) is optimal. ® Be careful to refrain from giving an unreasonable mechanical impact to LSI's or IC's, or from giving an unreasonable force to lead wires. ® Turn off the power switch without fail before detaching LSI's or IC's from the main body. @ When inserting LSI's or IC's into the printed wiring board, avoid touching their pins directly, but hold their black plastic packages. @ Solder LSI's or IC's in a short time so as to prevent an unseasonable thermal impact to them. -3- MZ-80K I • The machine comprises five main units, CPU board, display, cassette tape recorder, keyboard, and power supply circuits. For a quick solution to most operating difficulties, first consult the chart below to find which section of the machine is subjected to the trouble, and next to do the checkings according to more detailed instructions given in the succeeding pages. C___ S-,ta_rt_ _) No Check for the power supply circuit. No Check for the CRT display. No Check for the cassette recorder. Yes Yes Is the cassette recorder normal? Yes No Check for the keyboard. Yes No Yes End -4- Check for the CPU board. f MZ-80K CPU BOARD SECTION The CPU board is composed of the following six blocks. When it gets in trouble, first locate which block is concerned with the trouble, and next try to check for its corresponding circuits; the wiring diagrams of every block will be shown separately. CPU in trouble Display block Yes Check for video RAM circuit. No Yes Check for IC5 (8255) and its peripheral parts. Yes Check for IC5 (8255) and its peripheral parts. Audio block Yes Check for IC18 (8253) and its peripheral parts. Clock block Yes Check for IC18 (8253) and its peripheral parts. Cassette recorder block No Keyboard block No No Program block Yes Gets in trouble instantly with power on . Yes Memory circuit and its peripheral parts. • Checking methods of each circuit 1. By touching IC insulating parts by fingers: • If they seem too hot by heat generation; IC is defective, IC load is heavy or components are touching each other - ROM and V-RAM are exempted from this checking, however. • If a circuitry state is changed to another; Soldering is poor, socket contact is improper, or printedwiring is erroneous. 2. By using a synchroscope: • If the relation between input and output of TillC is iltogical, this means defective IC gate. • Check if the voltage level of TTllC is as specified: High level; over 2.4V, Low level; below O.5V. -5- MZ-80K Display Block Character generator DO - ~ M " Shift register Video signal 7"- H-BLANK <~/~ 7"- V-BLANK ~ Sync signal Bus driver L-L-- D7 - I -'RD ~ -- Video RAM WR- CSD L-- ~ AO ~ -/ A9 1r V Address selector I I----- Oscillator Display controller circuit ~ Block Diagram of Parts around Video RAM , Problem 1. Sync. signal is not produced. 2. Video signal is not produced. , C.... P_ Vertical sync. signal: Check for IC15 and IC16. Horizontal sync. signal: ~ck for IC1O. Is V-GATE signal present at pinQ)of IC24? Yes; IC24 No; IC5 Is V-BLANK signal present at pin@of IC24? Yes; IC24 No; IC20 Is H-BLANK signal present at pin @ of ICll? Yes; IC17, IC3 No; IC15 Is output signal present at pin '21 of ICll? Yes; IC17, IC3 No; IC29 ~ 3. Displayed character{s) is partly invisible. Check for IC29 and CG. 4. The display is positionally deviated. Check for sync. signal circuit. -6- , , MZ-80K • Cassette recorder/Keyboard Block D7 ~ DO PC5 PC4 PC3 -\ l' I I I READ I I Cassette SENSE I I I I L ~ I l L N ~ WRITE ~ ill Lt) -/ -------, [ PC1 I I MOTOR ______ -1I Motor controller Q) u ~ RD ------I ~ --c: Q; '" .c - WR ~ a. CS - .;: Q) D. Q) :c A1 AO - ) Decoder I I ~ I E E PAO ~o Cl PB7 l, H '" - ------, ~9 PA3 I ~ 0 .t RESET - I ) Keyboard ) I I .J" A I L _______ J PBO Block diagram of Parts around Cassette recorder/Keyboard. 1. "LOAD" operation is impossible. I s output signal present at pi~ of IC4? Yes; IC5 No; IC4 @ 2. "SAVE" operation is impossible. Is output signal present at pin Yes; IC4 No; IC5 3. Motor doesn't rotate. Is voltage at pin@ of IC2 at "Iow" level? Yes; IC3, 01, 02 No; IC2, IC24, IC4, IC5 4. Motor doesn't stop. Is voltage at pin@of IC2 at "high" level? Yes; IC3, 01, 02 No; IC2, IC24, IC4, IC5 5. Key input is ineffective. Check for IC5 and IC6. -7- of IC5? MZ-80K • Audio/Clock Block 07 DO -\ --I ~ 31.25KHz -- '1 J Clock function INT Programmable counter (8253) RO 1/2 frequency division WR J> Au dio output 2MHz CS A1 AO -- I WR -- Oscillator circuit for Tempo Latch CS -- RO I DO Block Diagram of Parts around Audio/Clock Block Check Problem 1. No sound is produced. Is output signal present at pin Yes; IC12, IC3 No; IC18 2. Sound is distorted. Check for IC12 and IC18. 3. Tempo is abnormal. Check for IC13. 4. Clock fu nction is abnormal. Check for IC18. -8- @ of IC18? MZ-80K • Memory Circuit Block AO ~ ____ A13 A15 ~ \ A12 Chip select A4 circuit \ A2 Data selector WR Driver RAM block D7 ROM DO AO~A11 Block Diagram of Parts around Memory Circuit Problem 1. Reproduced pictur shows "panic". Ch&ek Point Check for the following: ROM, IC46, CG, IC43 Address bus line; AO to A15 (IC44, IC45) Data bus line; DO to D7 (IC36, IC37, IC50) Control line; IC35 RAM (by using RAM checker*), IC52, IC53, IC56 2. Error display or misoperation is caused as a resu It of program execution. RAM 3. Cursol disappears. IC46,IC1 4. Returns to "MONITOR SP-1 002." RAM 5. Error is caused after a long operation. RAM -9- 11' * How to Use RAM Checker Remove monitor ROM from the socket ("M-ROM" marked on the PWB) and insert RAM checker into the socket and turn on the power switch (the picture gets "panic" for about 1 second): then the following RAM TEST-1 and RAM TEST-2 will be automatically carried out from the address $1000 to the maximum address and the tested results will be displayed: the maximum address refers to $5FFF in the case of the standard set. The following is an example of the testing performed with the standard set (with RAMs being all normal). Note: RAM (I) block, 16K bytes; RAM (11) block, 4K bytes RAM. TE$Tc1 . RAM l:EST,-, 1) t~ ...~t<:, . .~~~KIOOOOt<:, ~4IJoo.oo.1F, .> ·OOFf 00· .fF ·FI •.. RAM TEST-' In the range from the address $1000 to the maximum address, data $00 and $FF are subjected to automatic write/read test; if error is caused, "ER" mark is indicated in the unit of 4K bytes. In the above table, 3000-0K: this means write/read operation has been normal from the address $3000 to $3F FF. 6000-ER-6000-00,7F: this means there exists error somewhere from the address $6000 to $6FFF; this error is because the standard set is provided with up to $5FFF but with no more address, so it doesn't show a malfunction of RAM itself. An example showing an error really caused: 2OOO-ER·23&8.oo)~01· ] An error is caused in the addresses $2000s; namely, although data $00 has been written in the address $235B, its read-out data is $01. 2) RAM TEST-2 Write/read test is carried out with the following data. (a) Write-in data $00 (from the address $1000 to the maximum address) (b) Write-in data $FF (from the address $1000 to the maximum address) (c) Write-in data $00 (from the maximum address to the address $1000) (d) Write-in data $FF (from the maximum address to the address $1000) (e) Write-in data $FO and $OF to be entered alternately (from the address $1000 to the maximum address and vice versa). The above table (RAM TEST-2) shows all the items (a) thru (e) are normal - the indications "00", "FF", "00", "FF" and "FO" correspond to (a) thru (e) respectively. An example showing an error really caused: FF ER.-23FF..Q1 From the above, it can be seen that the tests (a) and (b) are both normal and that although data $00 in the test (c) has been written in the address $23F F, its read-out data is $01, which means that an error has been caused. In this way, which RAM block (I,ll or Ill) has been subjected to the error is first located, and then so does which RAM component having undergone the error, by the respective information given by the RAM tester. In the above example, the display of "$23FF" means RAM (I) block is in trouble, and the display of read-out data "$01" (with respect to write-in data "$00") shows RAM 1 of the block (I) is defective. L-_~ _______ ----------------------------------------------------' -10- .' MZ-80K ~ • Write-in data $00 Read-out data $01 07 06 05 04 03 02 01 DO 0 0 0 0 0 0 0 0 0 0 0 0 0 0 IT] 11 I I I 3 20 12 I 4 13 I 5 DO 17 01 18 02 19 03 I I 9 10 RAM(l) $1000 RAM (II) $5000 $5000 RAM (Ill) $9000 RAM( I) RAM(ll) RAM,][i 1 2 04 I 21 05 I 22 14 I 6 I 06 I I 23 15 7 24 16 I I I I 07 8 ~ Error to occur $4FFF (with 16KRAM) ~$8FFF ~$5FFF (with 16KRAM) (with 4KRAM) ~$9FFF (RAM RAM $9000~$CFFF (RAM RAM $6000 ~$6FFF (RAM RAM ~ _ (11) (III) 16KRAM) 4KRAM (11) (1II) 16KRAM) 16KRAM (11) (Ill) 4KRAM) 4KRAM • Waveform of Each Pin of CPU Board At pin ® ® At pin of IC7 (2) At pin 2MHz 8MHz At pin of ICg At pin of IC10 @ CD of IC27 63J.lS At pin of IC18 @ of IC13 ~ I1 n 0---- 31.25KHz 63J.ls At pin 1 I Q]i At pin of IC20 U 17ms nJl L ~ ® 13ms of IC21 ~ 17ms -11- At pin I CD of IC8 ~ 63J.lS l I N 0 A CINPUT 0 ... E ... 0 L--- l- f - ...ro c .....en Q) ~ L-..- I Series 1 Regulator 1 Transistor Chopping Circuit Transistor Chopping Circuit Block Diagram of Power Supply Section Rectifying and Smoothing Circuit Rectifying and Smoothing Circuit Circuit I Control l Control Circuit +12V -5V G -u G +5V -v -v -v -u G '-J IZ 0 -t - ,~ en !< ." ." C 1(1) :u i"m MZ-80K • Trouble Shooting Chart (DBOXD0004PAZZ) Problem 1: No voltage appears at any output terminal. Check for AC cord, AC socket, AC switch and C101. Is there AC 220V present across C101? Check for F 101 and T101 Problem 2: -5V is not developed. Check for T1 01. No Is there AC 9V present across the orange lead? Check for F201, 0201 and C201. Is there DC 10V present across C201? No Check for IC1, R201, VR201 and C202. Is there DC-5V present across C202? Ok Check for L201 and F202. Problem 3: +12V is not developed. No Check for IC2 and its peripheral parts. Is there AC 20V present across the yellow lead? Check for 0301 and 0302 (short-circuit after rectification). No Leave R403 be open; does there appear 0.3Vp;,p pulse at pin 181 of IC2? No Is there DC 23V present across C301 ? Is there DC 12V present across C404? Check for L402 and F401. Problem 4: +5V is not developed. F-1 Check for T101. No Is there AC 20V present across the yellow lead? No I-- H Ok Is there DC 23V present across C301? n N 1 r- r Check for 0301 and 0302 (short-circuit after rectification). .---- Ok Is there DC 5V across ~ C507? -@ Ok -13- H Ok No Check for IC3 and its peripheral parts. Check for output switching circuit. Leave R503 be open: does there appear Vp-p pulse at pin of IC3? Check for L503 and F501. U l - lVlZ 80K • Waveforms of Each Parts Waveform of pin (j) of IC2 and pin ell of IC3. Waveform of pin @ of IC2 0401 collector waveform I 23V 1-24~S..j 451-1s---l Waveform of pin @ of 0501 collector waveform IC3 23V ~ 23V -14- 23V L 261-1s MZ 80K • Trouble Shooting Chart (DBOXD0005PAZZ ----- for UK) Problem 1: No voltage appears at any output terminal. Check for AC cord, AC socket, AC switch and C101. Is there AC 240V present across C101? Ok Check for F101 andT101. Problem 2: -5V is not developed. Check for T101. Is there AC 10V present across the orange lead? No Check for F201, 0201 and C201. Is there DC 11 V present across C201 ? No Check for IC1, R201, VR201 and C202. Is there DC -5V present across C202? Check for L201 and F202. Ok Problem 3: +12V is not developed. Is there AC 20V present across the yellow lead? No Check for output switching circuit. No No Ok Is there DC 23V present across C301 ? Check for 0301 and 0302 (short-circuit after rectification) . Check for IC2 and its peripheral parts. No Leave R403 be open: does there appear 0.3Vp,;ll pulse at pin ~ of IC2? Is there DC 12V present across C404? Ok Check for L402 and F401. Problem 4: +5V is not developed. Is there AC 20V present across the yellow lead? No Check for IC3 and its peripheral parts. Check for T1 01. No Check for 0301 and 0302 (short-circuit after rectification). No Is there DC 23V present across C301? Leave R 503 be open: does there appear ~Vp-p pulse at pin ~ of IC3? Is there DC 5V present across C507? Ok -15- Check for L503 and F501. MZ 80K • Waveforms of Each Parts Waveform of pin Cl) of IC2 and pin CV of IC3. Waveform of pin @ 0401 collector waveform of IC2 I 23V f-24~s-l 45~s----l Waveform of pin @ of 0501 collector waveform IC3 23V 23V ~ -16- 23V L 26~s 45~s I -...J Contract t B,;ghtn", Video amp. 02001 Power supply +12V Horiz. sync. signal To horizontal circuit To FBT circuit To CRT heater To vert. circuit To audio circuit To video amp. To sync. separator AFC 02002, 02003 V-HOLD V-LlN H-HOLD Horiz. drive 02004 Volume Horiz. output 02005 Audio signal amp. IC2002 Video signal Block Diagram of Display Section ~ Horiz. osc. 02003 V-SIZE tr t Vert. sync. Vertical ,-----------" signal ,---------------, horizontal sync. signal Vert.osc. Sync. amp. amp'/output 02002 amp. IC2001 Video signal 0--- Audio signal H F.B.T Speaker t----~IIO ~~~ 240NB4 10' oz- m ~ tJ) ~ " t J) -c i\1Z SOK • Trouble Shooting Chart Problem 1: No picture appears. No picture Y 1 N~ Check for CPU board. 1- .. Check for +12V power supply. Only raster appears. N°rl Check for CPU board. Check for video input signal. I----, ~ Ok Check for VR· R2002, 02001 and vide0-40V power supply. Check for video OkL. circuit. Neither L. raster nor picture appears. No r1 4 IJ Check for CRT heater. Check for CRT plug. -1 CRT in trouble. Check for middle/ Ok..... high voltage rectification (02006, 02009 and FBT.I Ok ~. CRT in trouble. L- Ok Check for high '- voltage at K, f-- G1, G2 and G3 of CRT. ~ No ~~ Check for FBT circuit. No Check for AFC, horizontal oscillator and drive output circuit. Problem 2: Sync operation remains ineffective. NH Check for CPU board. Is there sync. signal? r-- Neither horizontal nor Check for sync. separation (02001 and 020021. r-" vertical sync. / operation is ineffective. Check for integrating circuit (R2012, R2013, and C2006 to C2oo8). Only vertical sync. operation is ineffective. Ok Only horizontal sync. operation is ineffective. L-., Check for AFT circuit (Check point (j) output of FBT, R2026, C2018 and R20271. Problem 3: Raster is too narrow. N~ Check for V-HOLO VR, C2OO9 and R2014. Is vertical oscillatior waveform normal (at pin @) I - of ICI2001)? Ok No I Is input waveform of 12001 (at pin 1(2)) normal? Ok Check for R2018 and C2012. I Is output waveform of 12001 normal? NO~ 12001 defective Ok Check for deflection coil (C20161. - I Problem 4: No sound comes out. r- Nr---{ Again set ./ correct program. Is program correct? r-{ Ok Is there audio signal? No 1-O~ Check for CPU board. Is input signal of 12002 (at pin@) normal? I Check for VR, N<:.... R2046 and C2038. N r i l 2002 defective f--- Is output signal of 12002 Ot-' (at pin(1)) normal? -18- l ~ Check for C2045 and Ok speaker. I 1 MZ 80K • Waveforms of Display Section Video output signal Video input signal Video output signal ® CV (,J) 1111111 +1111111 ·+11][111 ,+pl l l Il~ 1111111 --- 1111111111 5ms 5ms 5ms Sync. input signal Sync. signal amp. output Vertical sync. signal ® ell (4) r-- Tl Tr-1 12Vpp L- L 20l's Vertical oscillator Circuit sfVl ® of 2ms @ ~l TI 10r I t ,-- l 1.5Vpp 5ms nL - 5ms AFC waveform FBT waveform \1jJ 20l's Vertical linearity circuit waveform "ll 5ms l ..i...:. 5ms Vertical deflection coil voltage waveform Horizontal sync. signal waveform 8Vpp T 1.5Vpp OV I~v I~ 1J U') ~ 1V W Vertical drive collector waveform IJl I +- 1.5V RH-IX0015 IQ) Tn 4V 20l's 5ms Voltage at pin r- , Vertical output waveform ® (7) r-- ~ ! IL JJ ,. .( @ T 4V l 5V T 7V 5V ~ f 201' -19- 20l's MZ 80K Horizontal oscillator waveform Horizontal oscillator emitter waveform Horizontal oscillator output waveform 1- I 7Vpp --t-- ! 8Vpp 5V 5V \U 'U OV OV 20lls Horizontal drive collector waveform Horizontal output pulse Horizontal output base waveform n 3V L AFC pulse Middle voltage FBT pulse Video power supply pulse T 160V OV 150V 1 I " 20lls Audio input signal Audio amplifier output waveform Audio amplifier output waveform 5V li! OV 0 Audio output waveform The figures encircled by in the above refer to those of "Wiring Diagram" --"Check Points of Waveforms". 5V III -20- I I\J ..... JlJlfL JLJlJL READ WRITE Power supply for motor : 0 '"' I 0 'fl ~ • Amplifier circu it 03001,03002 Differentiation circuit R3005 C3002,R3005 .. Block Diagram of Cassette Tape Recorder I o-o0~ 0 Play button Erase head - +5 v -v Amp. circuit limiter circuit IC3001 ( 1/2) Amp. circuit 03003 Record/playback head TAPE -o~z m en :a cm :a 8 m :a m i!." =I m m en » en o MZ 80K • Trouble Shooting Chart Problem 1: Even if the play button is pushed, neither motor rotales nor tape moves. ~ Electronic governor motor defective. J Check for motor voltage: see if there is +12V t----between M+ and M-. N~ No r-1 Is voltage at the switch f-(inter·locked with the play button) in high level? Switch defective J Ok ;--< Check for vOlt~ at cheak point 4 (SENSE): it must be I-OV with switch on and +5V with switch off. Ok No Check for +12V power supply circuit (for motor in tape recorder) and CPU board. Check for +5V input voltage and R3024. I Problem 2: Record (SAVE) operation of program is impossible. rI No See if the switch SW3001 surely gets in action when the record button fis pushed. +5V must be present at check point @. Ok Switch defective. I No ~ Does there come any signal from I check pOint@? ok" Check for CPU board. N~ Is there any signal present at the base of Q3001. I SW3001 defective: check for R3002. rOf{ Record/playback head defective. Ok Is there any signal present at the record/playback head. t-- No I Problem 3: Poor contact of SW3001. Check for Q3001 and Q3002. Is voltage applied to the erase head? Playback (LOAD) of program is impossible, or error is caused. O~ Make su~e.of the tape I start position. rD-o-e-s -n-o-rm-a-I--' waveform arise at pin @? I I J r-C-h-e-c-k-f-o-r-p-o-we-r-s-up-p-I-y""" N~ +5V of CPU board. And check for plug and cable (6 pins). r- U Check for power l1 supply +5V. I No No r--' The waveform is not normal with much noises, or no waveform develops. Ok Check for each voltage. l_ I h1 Ok Much noises Check for IC3001, each resistor and SW3001. Ok ,......... Check for the size of ~ output voltage waveform of Q3003. Check for around Q3003. ........... Azimuth adjustment The voltage is too low. -22- Doesn't the erase head operate because of SW3001 in trouble? of the record/playback head is improper. MZ-80K • Azimuth Adjustment and Head Cleaning * Azimuth adjustment of record/playback head 1. Connect a synchroscope to the collector of 03003. 2. Load a test tape (TEAC, 3kHz-signal recorded) and play it back. 3. Rotate the azimuth adjusting screw so that the waveform on a synchroscope will be the maximum. Head azimuth adjusting screw Record/playback head , / Head cleaning Clean the heads, capstan and pinch roller often, to remove dust and tape residue. Foreign material on them impairs the sound quality of both recording and playback. Open the cassette holder, remove the tape, push the play button and clean them with a soft cloth moistened in alcohol. Erase protection To protect a cassette tape from being accidentally erased it was designed with two removable tabs. ,When the tabs are removed, it is impossible to push the record button. When no cassette is inside the machine, no pushing of the record button is allowed, either. Nevertheless, pushing the button strongly may cause a trouble. Pinch roller / -23- Head MZ-80K • Waveforms of Cassette Tape Recorder 1st stage amp. output waveform CD _Iv ~-~- -- - Operational amp. input waveform Operational amp. input waveform ® CID L pp 6mV~ pp 1.8V T DV -- Operational amp. input waveform Operational amp. output waveform @ @ n T{ ® -r- f1 Output waveform e- T I 1.5Vpp i 4Vpp Lv " u V v ~ , v v 5Vpp ---'- L- I Record input waveform CD v 2 r ,1MB l ® ® .- r- .- ~PJ .- - T e- i 4.8Vpp I _L I Record amp. waveform Record amp. waveform i L- -- ~ c- L- '-- Head input waveform Q9J -, ! i 6Vpp , \ \ I1 ~ V 1\ V 1\ I1 - The figures encircled byOcorrespond to those of "Wiring Diagram" - "Check Points of Waveforms". KEYBOARD SECTION Problem 1: A charactor isn't displayed even if a key is pushed. (1) (2) (3) Poor soldering Mechanical key defective Printed line broken If there is nothing abnormal in the above checks, proceed with the checkings of "CPU Board Section". -24- MZ-80K CIRCUITDlAG • Symbols of CPU Section r- (liS-I <D Z U - ~+ + 3 Il.. U g <DN <t- '" u :> :;: 0 :;: £::! + ~* BSJ ~~ 6S:) ~~ 09J ~~ 19J ~~ <:9J ~~ £9J ~~ v9J ~~ L9J ~~ <:BJ ~~ £BJ ~~ 00 B9J ~~ 10 t>BJ ~~ 69J ~~ ZO SBJ ~~ OLJ ~~ 9BJ ~~ !LO ILJ ~~ tp() L8J ~~ UJ ~~ BBJ ~a ~~ I{) Z <!) 0J 01 0 il --'VV'.-- LO ---'VV'r- If) --+ -- -- rn £LJ ~~ 'r90 6BJ -25- B* SBJ ~~ I j [] [] [[] [[] [[] [[] [[] [[]] : 99J ~~ ~* ~ I I I en I\J ISlea5 +5V 7414 'C4 i i i i _ 71 ft_ rnw iiiEQ RFSH......--1@i .HT '. +5V II· I 27 RD RESET 6 vec HALT iiii ft ~= 2. ~ I: +5V M MPU AND SYSTEM BUS A" A.. AM A.. Do D, D. ::::I 0' ~ f C. I» .~ C ~ D. ~ 0 3 Z80 CPU D4 60 I» Di' ce . -... ;:;: C (') Ri) D7 Do . IC46 IiIj • Q n c I I ..... I\J RAM MEMORY +12V +sv -sv ADo AD A02 A05 AD4 AD I ~ • I • RAS RAM24 DOUT RAMI6 DOUT I WE DIN I AOAI AlA.A4 AS!:§' CAS AS DIN WE RAMS Aa AI A2 A. A4 AS MCAS DOUT DIN RAS WE 11 I RAS I AD AI A2 A3A4 AS~ CAS DIN DOUT RAM7 DIN I I DDUT RAMI5 I DIN I DOUT I DIN DOUT RAM6 DIN I I DOUT RAMI4 I DIN I DOUT I DOUT DIN RAMI3 RAM5 DIN DOUT DIN DOUT I I I I I DIN DOUT II DOUT DIN II DDUT DIN I I DIN RAM4 RAM 3 RAM2 DIN I DOUT 14 DOUT RAMI2 I RAMI 4116 DIN I 2 DOUT I DOUT RAMI I DOUT I DIN I DIN I DIN I DOUT RAM 10 I DOUT 14 14 W! DIN I ;r WE" DIN RAM9 4027 or 4116 ..- I~ RASI S 7 • 12 " le 131 '"~ 4 AO AI AI A. A4 AS AS CAS RAS AD6 .1 DOUT I I 14 1 S 7 • II II 10 131" 4 AeAI AIA'A4AS~CAS RAS RAS. RAM23 I RAM22 I RAM21 I RAM20 I RAM 19 I RAMIS I S 7 • II 1I 10 I L 4 .1 AD AI AI A3 A4 Ao ~ CAS RAS WE AS 4027 DIN I or 4116 DOUT 14 RAM 17 RAS. l:i I. T 01 DO WR I)~ " D7 06 Do D4 Do 02 s b b 9 CS2 I 14 I 07 '06 'Do OD4 D' D02 DOl DDo • -2:::s ler ra. c: "V n N 3 ~. ;:;: C ~. n I I r-J 00 RAS. 11 9 iif- IC52 LS ~ ~a RAS, 1C52 ~ ~. RAS, >--------i le: 3 ~2 SI CSO Q .. 3 RFSH C LS74 ICSS 0 PR 4 cs. 3 r IOk •• RA 2 CK 11 iiJiEij 3 12 IC54 . 6 ICSI Y .*1 1 D~ 20 LS I -Hr LS 20 .---... 13 ~ LS 20 1C54 R46 I e 6 3 74 ... '7 ....!.. . +.V 110 9 I 11 2 12 3 13 4 • 14 15 6 16 • 7 CSI 1C54 a 6 RD Cfl CS.. CS7 Cii cn CSA Cili CiC D07 0D0 DOa - DOo DO. DO. DO, 2 00 D. Ao Ao a LSM4 IC50 28 19 A. A. 7 .,.. AI Aa • At A3 6 -G(- 18 RAM SELECT AND ROM MEMORY 17 07 le D. I. 00 140. 1102 13 03 10 ---L! ~ ~ 6 I. 4 17 ~ la A4 A4 Aa As As 2 A. M-ROM 9 112 7 14 18 13 As Ae AM) Au A7 ... Ae AIO All I ., 21 I I A7 IK R44 "'0 07 De :::s o· re~ ...C. c: ~ I» 0 .... § 3 (") ~ cso +5V ...I» C iij. ea D. CS. n c ;::+ 0. Do Do D. Do • (") :0. ,~ I I\) I co AI ADI AO A7 ADO A8 AD2 AD3 I I IC56 5157 A3 A2 A9 ADDRESS DECODER RAM ADDRESS MUX AND Alo ¥ I 12 SI LsOO All AS rI A8 IC57 150 CS2 0 A 0 ~ ffi ....\, 9 8 m E12I"- • 8 CS6 E6 • CAS cse:oCsEi CsE2 rrr B C LS42 IC30 I" I~ I. AA CSD CSC CSA CSB CS9 6 Ii 7 6 m Ell I. 16 .• U5 13 14 12 11 10 13 11 10 9 7 4 Ii CS4 E4 3 0 2 3 CS3 E3 2 4 CS2 E2 m CSO 1C47 154 G2 GI 19 18 MREO ~ :::I 0' rSl a. III W C ." n 0 ~ - 3 ; C ij' ea EO 8 7 El W OUT c n ;;' 10 i R45 n. +IiV 91 5 12 GND 24 Vet; • n ~' I w o I '~7 IL4 2 Rl 220 "- U~ I~:K IC7 ~ IIL~ 10 -1P 1 I R4 MO J rK a I C19 IC22 00 LS IT ~ 0 • 10 9 ~ ---..!.CK 11 LSI07 IK le 7 ~. f!Y' 'MD. SYNC COUNTER I B 6 IC22 !5 4 IC26 86 T'L---' IC26 6 IG 131 12 2G 23 ~ ~ ~~:5 l~~ OD IC9 LS93 Qc A II~ J ~OS7 0 F--- '--! CK --= J 8 O'~A QA QI 9 ICI4 LS93 8 121l 31.2!5K Qc 8 Cl Kl ~~ IC25 I r- J Q !5 5 101 4 I 2 102 10> 104 2:04 J~Ol J~022~0'JJ (d) (e) (f) +.V ~ • 1'13 ~ 8 C 9 1 IC32 100 ~ 0 131 (c) (d) (a) (f) A I B (g) (h) (i) (j) ' .'~. 0 oc 00 11 17 J11 177 C :5 .8 IC34 9 OA OK> OB 4 8 201 202 20' 204 J J.J J (j) ~~, 1~02120>'~D4 (g) (h) (i) jl " hi 91 dl oL Q - $I r- I LS IC20 !5 08 4 6 U boJ" IC20 ~LS > 2 08 K CK J +~ R6 IK 0 CL LSI07 le.s 06 Q 5 J 4K lel0 r ~ 3 LSI07 ...!!CK I o~ H-Synch '--------------------------1~--------H---B-,a-n-k---- H-Blonk '1 8 CK 1 Cl ~ ell 21'2~ JJJ 'li 177 IC33 OA CK2 OB Qc A ~~~~~ I ell LSI07:5 ~ ,...!.K Cl 8 Ct(1 le,s 1 (b) O.'!"!""r"'!!CK ...!K..!!K CL 12 CK ~ 1:5 IK IK IC2S R17 (a) +.v R18 +'V RO (21 L-"RO(;12~1l-=13RO(2J;:::::::...-----'':' 1"'31 B 8 .----~+--------------, .L~ B 11 '-.'1'_1';:-1,'" 2.1 3, ~ .----~+-------------~ +.v R1S I IC28 (c) 0.>-------------------~------~----------------------~~~+_~_4------------, 4 10 :5 11 04 IC27 8 OB Oc 00 LS93 9 I It=t:==~ni~~~ 01 0203 • ...n ::s 0 a. ~ a.. Cl) 0 C CD "g (") 0 -.... u; 3 Di· ce DJ C I: ;::j: Q ~ ...wII • A. 3 4 5 6 7 • 'I WR CSll OIR 9 G 02 LS 13 48 '1 A.~ lA S 2A SA AZ~ A'~ 4A As~ G "J. LSIS7 L- IY~ 4Y " 5Y 9 A. 6 r-- 5"" 'Y IC40 1C21 • (.)~ 28 58 I (a)>-----l 18 (.)~ (C)~ 1C23 12'~ " III 18 17 16 15 I. 13 I• eo" 1tT 9As CHAR ACTER GENERATOR AND VIDEO RAM RC 00 D. Do D. 04 00 O. D. LS245 IC43 Az 7 As 4 I.o ft 3 Aa O. I As 18 As 15 et 8J. 4Y rL- IL CS 51"" AI iI! 10 "d. A' I Oz As 3 2 As 2A SA 4A A<~ lA A'~ A7~ As~ S G '1 '1 LStS? IY 4 IC 39 2>' 7 .' 3Y (.)~ 18 AT (.)~ 48 (9)~ 58 (f)~ 28 As I 1 81 As 48 A< A'~ SA A.~ 4A (I)~ 38 (j)~ 7 Az • A. A< '1 • '1 La.S? A. I 00 1C38 A. D. 13 S 2114 I. 00 A. I IC42 3 A. rr A. 2114 D. 1 '9 Ale> As Az A. 8 5>' r!!-- - As 18 4ytlL- AT I A. 04 14 04 " 00 8 01 10 OZ • a . VOo d. '0. .!!....--VO. 05 1& 07 ..!I.--VO' O. 16 CS. CG-ROM CSZ 21 CS) u=: I. IC41 2 Oa .5V R19 • er :::J ~ ~ a. ~ DI c: "g (') o.... § D1 3 C~r c c: ;+ c; Q Q3> VIDEO GENERATOR I<,;LU ,'-'" (g) q 11 +5V (2M) H-Blonk H-Synch GND +12V SND +12V GND GND SOUND • ~ o· ~ n Cl) (I) Q. III ... CJ 0 "'0 C (') 2- 3 '::::i CC ...III ;::;: 0 ii· n c: ...Q 1 tu tu 1 .~ 7 GND 26 IVcc B25~ IC5 35 RESET A'3 AI AO RESET 8 9 Aa CSEO~CS Wii~WR Ro~Ro 04 05 De 07 ~ ~ ~ RA' +'V IOK X8 I 1(i)(2)@(4)®OO(rl@®@6' P80~8 Ps,'S PB2~ PB." PS.!!! 2 , o ' • 4 4 • • 5 6 '5 A LSI4~ 7 9 6 7 14 B Tt.;: §j PB6~ PB7~ PAD PA, 8 '0 I3 C '2 D 9 " J PA2 IC6 V-GATE - " V-Blank PA. • PCO~ PCI~ PCZ 16 PC! 17 PC4 13 u.. PA7fllPC7 10 peG PCS 12 ICl ,.!.lOUT ~~~ 17 • J 111 I I 1 __ .1'1'4 IC4 LSI4 3 ~ C14 I.SK R23 +OV 01 SCr---t-- RST TRG Vcc -- 001 G R +5V ~ 2SC373·3 .~ IC4 __ LSI4 1.2K R36 I 0 , CASSETTE ANO KEY R3, 10K GND J CH .. IOOPF.,. 6 5 .... OI .. F 01 Q .C'6 CL --,;-y; ~CK ~~~4 PR ~ 2 I~F I .0 ~I--- 8 - IC3 II"~ +12V +5V MOTOR 5V SENSE READ WRITE er:::::I ~ (I) CD ...Co OJ 0 I» c "'0 n 0 -00.... 3 I» ea ... m" 0 ;:::t." s:: =0" n n • -I I I oil> eN ,~ 01 00 7 8 01 Do CSET Ao 19 20 21 AI 23 WR Ri) Ao AI CS WR RO 02 6 02 04 22 03 5 03 GATEO ClKO OUT 11 9 10 14 15 13 16 18 TIMER AND SOUND IC18 8253 GATEI ClKI OUT! GATE2 ~ 04 O~ 3 0UT2 ClK2 07 2 D6 4 06 07 17 ,~ 2M 10K 31.25K R13 +5V ~ 06 IC3 12 II n 6 ~V 13' CK lS74 IIC12 INT 1=>;> t;, CRO 555 THRI 6 , Cs ....... • Rl0 ,O+~V I ~~~2 C4 IOOPF , Cl coo 3 10UT JCt Q I ":J4:t 6 s :::>r.. IC121 lS74 R8 IK +5V .. • ..3 -- ~ a..0 f C. . OJ 0 I» c: "tI n a CD I» i· C ;:+ c n Q ,I,~ I I U1 w ... - [> (MARK) G 10RQ G G HALT RESET G G G G G 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 All AIO A9 A8 A7 A6 A5 A4 A3 A2 AI AO G 07 D6 05 D4 03 02 01 G G G G G MT G WR G RO INT BUS CONNECTOR DETAIL 25 MREQ 4 AI2 00 G 2 3 AI4 AI3 G I AI5 B I A - -5V GND +5V +12V " C38 -25V =: =~ ~ =+100 J.l I~~ C37 2SV IOOJ:J: 25V C36 o I- k) -5V GND 10 +5V P+12V • ~ er ~ do en CD Cl) 0 OJ C n -a 0 .... S 3 -... Cl) 0 jji" ca ., ;::+" Q ., n c ~ +r:w C301 -liI- II.L-.J 11. ~ -liI~ 12 - 0 O C302 . "~ g. E ~ c( . ~~ ~~- ~ E c4t + III ~"I V..-.v T~ 'H- ~~_ .l8 --u- . 0401 + o -5 ~ ... IL 0 E 0 +12 &T1,6A I~I F401 L402 ~ o +5 '0 + 01 10 If)?~ o .L~ -'VVIt--It504 & T1.tiA I~J F501 C506 -H- 0502 0501 Hf~~1 --=- *8 C502 "'* - fi -J'VVV""-a: J\NIr ~1£~U ~t 1tJ T6 ...... L503 ~ ~~t@ C403 """" J\NIr R405 C40{'"R~' ~~i w-~ §~~ j .i~~@~ 2 ;!; r---- ~~ + ~I)I~ ~~ o~_ Q401 • o· ::::I ~ CD (I) -< 'a 'a C (I) ~... ." o o iii ... - o c- 3 !f I I w ..... L ±IO% AC 220V 650101 &SWIOI I I I I 1 1 I 1 rf"\Jl I 6T!500m I F201 POWER SUPPLY CIRCUIT - 11 ~ 6TIOI I----~ ___ __, Al 2500}l/55V C30I ... C3041 \:501 IOll/S5V Jl78MGU~ VRZOI 12K .20' ~ ZOOIO + C202 470/lOV ~-!5V L201 6T31!5mA F202 ZOOO9 Zoo07 F401 MZ-80K L402 L401 • er:::J ~ ~ -< 'C 'C (I) C ~ ~ "8 So 3 I» i'... ea C 5' :::;' :E I I ~ .a L AC240V ±IO% &50101 &5W101 I I I I I I i &TIOI I rrv:>, (FOR UK) .:a.. POWER SUPPLY CIRCUIT III --------, C50I ... C!041 25OOp155V ~501 IO~/"V , COOl 470/IOV A R501 4.7K .... F202 ~-5V Z0007 L401 F401 + 12V MZ-80K L402 ZOOO9 ~ o -:; .c: -" f ~ er ::J -< 'tJ 'tJ en c ..f ~ o 3 DJ a::a Ai" a::a C 5" ::;" ..... I I w co -~ + u +~ R2051 + A/' ",. 2 I 7 8 R2047 1 R2025 1""""" + R2046 VOLUM E ~ .. R~~';6 K H .. C -It- R2002 'I." ..... 02009 + CONTRAST ~ EO G .. .. -It- "!;! ,,2 U fjT R2042 + C2051 -If- 2 FOCUS R2044 Raoeo .. • u +T ~ ~ 0 N ... V-HOLD R2017 ~ R2037 ':;':' L2001 .. H-HOLO ~ T NT U R2033 ~ R2043 --JWv-- ~ Si! 0 2 ~ • 0 t., NO.~ C2025 + C 2 ~.. ~ =" +. ~ TOfj :f f t!;!~ 02003~ ;J. 21uT i fi I 14 c202 '''D20032 BRIGHTNESS ~ .~ N ... o o N 02007 rl:: I~ ~1 ls tfu 2:0: 8 7 U ~t::l ~ ~T o -I~2018.8 O . & ~.I.~ .-~;;; B -I~ --"NIl'-~ C2052 ~ R2008 R2048 0 f..2- 02004E~I~f ~ C2 -U- f C2032 u~ ~u" S· NT C2003 0~ 0 1 ,t"""" ---..,.. -w-0 0 ~ • .... - --It-- C2001 ~ "t" R2001 "I,'. g: §T~ ~ B I R2026 C2020 -----f'-- R~ -It-- I =: ,~ ~ T L2002 -'"RI'- • -:t,:005 I(l~~ ~ T~ [ I ~ C200!! ~*+ C QPWBF0261PAZZ -~ - ::::016 ~ +*+ ~ ~c 02001 'ft f - - '1111' R2004 02002E -----f'-- ______ --f\- C2004 O +1210 -·0 EIO ~ O '.v... B C g: R2001 02001 R2011 N 2 5 4 3 6 7 8 9 10 --ANy-- ~ E_~ 124 ~ N o o R2015 ~ ~ ,.. ~ 1 '1-:. R2012 C20ll" ~ 0 --A-- O SIO --- +--C2012 I . -u- .+ ~~ :::T CZOl4 Cl ~l -11; 2 ~ ;; ~ --M-- ___ C2049 +R2011! R2048 --Hr- T fjT.. g. C2040 +.., -ilt- C2011! R2019 C2013 ~ +~ + + +* :!!! .i}ir~ -It- J. If) ~... - I t - ' g C~,C}~I u • J. o T' 4 -il1-5 ~ ·o------"I>N- ", cI42 o J.~ "'OspR2014 T::: ----w... C20S0 SP - ::::I er S1 f < ii' 'C Vi' o o .... iii co < 3 • en - 1 "'" 0 1 _. +12V GNO Video " Sync Sound 330 R2026 15. 02013 12. 0015 02004 47 ~ _ B- r OO33 1c2007- +___ 7 2.7K 10. R2019 1 ,. V-SIZE - C2014 22u/16V 02007 1500< + C2003 ,OuIl6DY I. R2024 llW I.OK RC-ElOO29TA R2023 330 602051 12 L2002 ,-----+-"'-1 Rei LZOO5TTA (:~OO4TAI V-LIN R2025 R2021 1.511/2WI C20I~~12 22~/16V \!!I SeOK R2045 20K(BJ(M'r'O~2TA) R2022 n > Ip/35VITNI ~R2014 ® _ • R201. 27. lUJ( IK(1I2W) R200S 02006 2.2M -..:1 ~.~~:sv +·.tl'"C2..0voiO.-----I--I-~ V-Hold [ R2DI7 50K(B) B7029TA 1000/ IOV 020151 3.3( II2Wl C200!'5 I t-<r-:='=+-+-' t~:s"" 1 ~ .l&.Y • C2001 II ~ ~-i~-' C2oo2.11200" R2063 • Rci lH4070TA t---:::I~~f=t--;::-JvW~4-llJL---=~ ~ 0203. 2.~KI2W) C2036 .IJI/200V ...... ,.. E0 ~I? + .!!!! IKU) R2049 47K .OI/~V C20~2 +C2048 _22OW IOOV ~ .~ p 11 ...-+------c~ ~ C2047 22a../16V GI •• 0) ~ -1- :~~--Y.~~-~~~~L---~~:-----~~~~~-----~I~---~.g~~~~~34~V~~~~~~~~5~ ' 1I 1:> M .ri R2011 I. R2012 Q.~201. @ .015 _Iil! 4.7K 02009 R2003 ~~~~14~ I DISPLAY SECTION R2002~'7 500(8) RVR-BOOI5PA CONTRAST QPWBF 02.,PAZZ 0 ~ 02001 OZlls.. 10 47 R2001 MZ - 80K • ~ er :::J -< en m "C in· o o .... 3 11) ce ., Di· o ce ~.' :::J ~ ..... MZ-80K • Symbols of Cassette Section C300t e ~3001 ~R3004 ~~ ----'Wtr- R300 3 ~ C3002 .x 0 an o -1'-. R3006 ort) 0: ~ rr> 0 ::t R3007 J\ ~ R300~, -r Q3003 a.. LO N o lJ.. 10 -11- ~ ~u R3010 C3006 -1 r- R3011 ~ R30 12 -.J...Nr- J... T ~ C3007 -::-Wor- i t~flJ 30;~:14 o c2~~lOf W, R3018 ----Wtr- R3016 R3022 ~ R3023 ~ R30~ C3003 _ N +~ en en I 0 C~O~ 0 ~ 3= en C\I ~009 , oo 0: R3017 R3021 13001 R3019 YIlv ~30~20 +- Ne ~ -tt-e e e ~ D • C3009 Q3004 LO e e.e~ev -41- I I\J 1 .-. 1000P .L. C3OO!II .1 _ SW 3001 R3007 47K 'Q3OO3 2SC1681 R3012 22K C3007 R3011 1000P 47K ~ FO 259P ~T1f~~f,~@ r-----------------i R300I 470 CASSETTE TAPE RECORDER SECTION K TRC - 0004 PAZZ C3004 12:! 0 + MZ-80K R30ZI 2MG IOK ~ R3002 ~ :s !er I ~ 2- Dl 3 ea C 5° ea So ~o :e• ... REPLACEMENT PARTS LIST To MODEL MZ-80K REF. NO. PART NO. DESCRIPTION CODE * * * CPU BOARD UNIT SECTION * * * DCPU-0006PAZZ Assembled CPU Board Unit INTEGRATED CIRCUIT t IC1 IC13 lC2 I RH-I X0134PAZZ NE555P AG RH-IX0079PAZZ SN74LS74AN or HD74LS74 AG RH-IX0038PAZZ RH-IX0131 PAZZ RH-IX0136PAZZ RH-IX0126PAZZ SN7406N SN7414N ,uPD8255C SN74LS145N AG AM BA AL IC7 IC211 IC54 F1H-IX0074PAZZ SN74LS04N or HD74LS04P AE IC8 1 IC31 ! RH-I X0040PAZZ SN74121N AG RH-IX0125PAZZ SN74LS93 AK F1H-IX0127PAZZ SN74LS107AN or HD741S1 AG 1 IC121 IC55 IC3 IC4 IC5 IC6 I ~ IC9 \ IC14 IC27 IC10 IC15 IC16 IC19 IC25 IC11 IC17 IC18 IC20 DESCRIPTION PART NO. CODE IC47 IC51 RH-IXOO45PAZZ RH-I X0177PAZZ SN74154N SN7425N AN AF IC53] IC56 IC57 CG-ROM M-ROM RAM RH-I X0148PAZZ SN74S157Nor HD74S157 AO RH-IX0147PAZZ DPROM0001 PAZZ RH-IX0171PAZZ RH-I X0145PAZZ AM BS BL BE RAM RH-IX0121PAZZ SN74150N HN462716 or MB8156C ,uPD2332C 16KRAM, ITT4116 or MB8116 4KRAM, ITT4027 or MB8227 AV TRANSISTORS AND DIODES 01 02 03 04 05 06 01 02 VS2SA505 Y //1 A 2SA505-Y AF VS2SC373G//1 E 2SC373 AC VHD1S1555//1A 1S1555 AA 220 ohm AA 1 RESISTORS RH-I X0142PAZZ RH-IX0076PAZZ RH-I X0146PAZZ RH-IX0075PAZZ IC22) IC24 IC58 IC23 I IC52 I IC26 IC28 IC48 IC49 IC29 IC30 IC32 REF. NO. I I IC33 1 IC34 ! IC35 IC44 IC45 IC50 IC36 IC37 I I SN74S126AN SN74LS10N or HD74LS10P ,uPD8253C SN74LS08N or HD74LS08P AH AE BC AE F1 H-I X0070PAZZ SN74LSOON or HD74LSOO AE F1H-IX0071PAZZ SN74LS02N or HD74LS02 AE F1H-1 X0132PAZZ SN7486N AF F1H-IX0128PAZZ SN74LS20N or HD74LS20 AE F1H-1 X0129PAZZ F1H-IX0104PAZZ F1 H-I X0130PAZZ SN74LS165N SN74LS42N or HD74LS42 SN74177N AO AH AO F1H-1 X0133PAZZ SN74177N AL F1H-1 X0123PAZZ SN74LS244N AS F1H-IX0176PAZZ SN74LS241N AS F1H-IX0083PAZZ SN74LS157N or HD74LS157 AH F1H-1 X0122PAZZ MB8114NC or HM472114P-3 AV F1H-IX0124PAZZ fiH-IX0090PAZZ SN74LS245N Z80CPU AR BF IC38 [ " IC39 .IC40 I IC41 IC42 IC43 IC46 I I R1 R5 R30 R32 R2 1 R10! R3 R4 R6 R7 R8 R11 R12 R14 1 R19 R22 R29 R38 R41 R44 1 R48 R9 R26 R36 R13 R27 R28 R31 R33 R35 R39 -43- I r VRD-ST2EF221J VRD-ST2EE182J 1.8K ohm AA VRD-ST2EF222J VRD-ST2EF561J 2.2K ohm 560 ohm AA VRD-ST2EF102J 1K ohm AA VRD-ST2EF122J 1.2Kohm AA VRD-ST2EF103J 10K ohm AA AA , IV1Z 80K PARTS LIST REF. NO. R20 R21 R23 R24 R25 R341 R40 R37 R42 R43 VR RA1] RA2J r PART NO. DESCRIPTION CODE REF. NO. VRD-ST2EF271J VRD-ST2EF822J VRD-ST2EF152J VRD-ST2EF473J VRD-ST2EF123J 270 ohm 8.2K ohm 1.5K ohm 47K ohm 12K ohm AA AA AA AA AA VRD-ST2EF101J 100 ohm AA VRD-ST2EF153J VRD-ST2EF332J VRD-ST2EF331J RVR-MOO19PAZZ 15K ohm 3.3K ohm 330 ohm Variable Resistor 68K ohm AA AA AA AC RR-KZ0031 PAZZ Resistor Array 1OK ohm x 8 AD CAPACITORS Cl C4 C17 C2 C3 C7 1 I VCCCPR 1H31 OU 1OOPF, Ceramic AA VCOYKU1HM332K 0.0033MFD, Film AA I PART NO. DESCRIPTION CODE C361 t C37 C38 C39 C41 C59 C61 C63 C65 C66 C68 C70 C72 C75 C77 C79 C8l C82 C84 C86 C88 VCEAAU 1EW107Y 100MFD, 25V, Aluminum AB VCSACU 1AE336K VCSACU 1VE 106M 33MFD, 10V, Tantalum 10MFD, 35V, Tantalum AD AE VCTYPU1ED104Z O.lMFD, 25V, Ceramic AB RC RSA0009PAZZ OSOCZOO12PAZZ OSOCZ0010PAZZ OSOCZOO09PAZZ Crystal,8.00MHz 40-Pin socket 24-Pin socket 16-Pin socket AN AH AF AE OLUGPOOOl PAZZ 16-Pin Descreat platform AC OPLGZ0021PAZZ OPLGZOO18PAZZ OPLGZOO06PAZZ OPLGZ0020PAZZ OPLGZOO16PAZZ OPLGN0403CEZZ 50-Pin terminal (for Bus lines) 6-Pin terminal (for TV) 6-Pin terminal (for cassette) 3-Pin terminal (for LED) 18-Pin terminal (for Keyboard) 4-Pin terminal (for Power supply) Printed Wiring Board AW AD AD AD AF AB MISCELLANEOUS C12 C24 C25 C27 XTAL I C31 C33 C34 C35 C40 C42 CSl CS2 CNl CN2 CN3 CN4 CN5 CN6 I C58 C60 C62 C64 C67 C69 C71 C73 C74 C76 C78 C80 C83 C85 C87 C89 C90 C91 C92 C5 1 C23 r C6 C13 C15 C16 C20 C14 C18 C19i C21 C22 VCTYPUl BD104Z 0.lMFD,12V,Ceramic I AB OPWBN0024PAZZ BS ~ * * * MONITOR TV UNIT SECTION * * * DPWB-0176PAZZ Assembled Monitor TV PWB BS ILPC1031H, Vertical deflection Circuit LA4030P, Power Amp. AM VS2SC1514-/1 E 2SC1514 AF VS2SA673-C/l E 2SA673 AC VS2SC1213-C1A VS2SC681 A-R 1A 2SC1213 2SC681A-R AC AM INTEGRATED CIRCUIT VCEAAU1CW105Y lMFD, 16V, Aluminum VCKZPU1HF103P O.OlMFD, Ceramic AA VCEAAU1CW106Y VCEAAU 1CW227Y 10MFD, 16V, Aluminum 220MFD, 16V, Aluminum AB AC I VCEAAU 1CW226Y 22MFD, 16V, Aluminum AB VCOYKU1HM103K O.OlMFD, Film AB C26j C32 VCEAAU1CW107Y 100MFD, 16V, Aluminum AB AB 12001 RH-IXOO15TAZZ 12002 RH-IXOO16TAZZ AK TRANSISTORS 02001 02002) 02003 02004 02005 -44- • ~ • MZ-80K PARTS LIST REF. NO. DESCRIPTION PART NO. CODE DIODES D2001 VHD02Z7R5A//A 7,5V Zener, 02Z75A AC VHDl N34A///- 1 IN-34A AB D20021 i D2003 D2004 RH-DX0062CEZZ SI-RECT208 AC SIR60 AC RHl AD R2001 1 R2003 VRD-ST2EF470J R2004, R2002 RV R-B0015PAZZ I 150K ohm, 1/4W AA RV R-B7021T AZZ AD R2009 R2010 V RD-ST21::: f-472J V R Ll-ST2E F4 73J 250K ohm, Variable Resistor for Brightness 4,7K ohm, 1/4W 47K ohm, 1/4W AA AA AA AA 1 VRD-ST2EF102J lK ohm, 1/4W AA VRD-ST2EF 153J Vf-lLl-ST2EF123J VRD-ST2EF272J VRC-MT2HC;3R3J VRD-ST2E:F273J RVR-B7029TALZ AA AA AA AA AA AD J R2018 R2019 ' R2053j VRLl-ST2EF 122J 15K ohm, 1/4W 12K ohm, 1/4W 2,7K ohm, 1/4W 3,3 ohm, 1/2W 27K ohm, 1/4W 50K ohm, Variable Resistor for V-Hold 1.2K ohm, 1/4W VRD-ST2EF103J 10K ohm, 1/4W AA f12020' R2021 ! R2022 VRC-MT2HGl R5J 1,5 ohm, 1/2W AA RVR-M7052TAZZ 20K ohm, Variable Resistor for V-SiLp. AC Vf-lD,ST2I:::F331J 330 ohm, 1/4W AA RVR-tl7004TAZZ 300 ohm, Variable Resistor for V-Line 820 ohm, 1/4W AC 6,8K ohm, 1/4W AA VRD-ST2EF822J 8.2K ohm, 1/4W AA VRDST2Ef392J 3,9K ohm, 1/4W AA R2033 6. VRD·ST2EF330J 33 ohm, 1/4W AA R2034; R2035 , R2038 R2039 R2040 R2041 R2042 : R2043 J R2044 VRDST2E F332J 3,3K ohm, 1/4W AA VRD-ST2EF680J V RS-PU3DB222J VRD-ST2FF221J VRCMT2HG560J 68 ohm, 1/4W 2,2K ohm, 2W 220 ohm, 1/4W 56 ohm, 1/2W AA AB AA AA VRC-MT2HG330J 33 ohm, 1/2W AA RVR,B7022TAZZ AD R20115 VR D-ST2E F564J lM ohm, Variable Resistor tor Focus 560K ohm, 1/4W VRD-ST2EF821J R2029 : R2030 f VRD-ST2EF682J I j VRD·ST2EF222J VRD-ST2EF471J VRD·ST2EF473J 2.2K ohm, 1/4W 470 ohm, 1/4W 47K ohm, 1/4W AA AA AA 12 ohm, 1/4W AA VCOYKU1HM152K 0,0015MFD, Mylar AA VCOPSC2DA 104 K O.lMFD, 200V, Film, AC VCEAAU2CW106Y VCEAAU1CW478Y 10MFD, 160V, Aluminum, 4700MFD, 16V, Aluminum AE AH VCEAAU 1CW108Y 1000MFD, 16V, Aluminum AD VCOYKU1HM332K 0.0033MFD, Mylar AA VCEAAUl EW475A 4.7MFD, 25V, Aluminum AB VCSACUlVE105K VCEAAU lCW226Y lMFD, 35V, Tantalum 22MFD, 16V, Aluminum AC AC VCOYKUl HM333K 0,033MFD, Mylar AB RC-EZ0029T AZZ VC EABA 1CW226M VCEAAU1AW107Y RC-EZ0024TAZZ 22MFD, 16V, Aluminum 22MFD, 16V, Aluminum 100FMD, 10V, Aluminum 6,8MFD, 25V, Aluminium AC VCOYKU1HM153K 0,015MFD, Mylar AB VCOYKUl HM683K VCEAAU1CW107Y 0.068MFD, Mylar 100MFD, 16V, Aluminum AB AB VCOYKU1HM103K 0,01 MFD, Mylar AB VCOYKU1HM223K VCOYKU1HM473K VCEAAU 1 EW335A VCOYKUl HM123J VCOYKU1HM473J VCCSPU 1 H6101 K 0.022MFD, Mylar 0.047MFD, Mylar 3,3MFD, 25V, Aluminum 0.012MFD, Mylar 0,047MFD, Mylar 100PF, 50V, Ceramic AB AB AB AB AB AA AA VCKZPR 1 H F 103P O,OlMFD, Ceramic AA AA AA VCOPSC2DA683K VCOPSC2DA223K VCOPSC2DA 153K VCEAAU1HW105A VCOYKU1HM472K 0,068MFD, 200V, Film 0.022MFD, 200V, Film 0.015MFD, 200V, Film lMFD, 50V, Aluminum 0,0047MFD, Mylar AB AB AB AB AA VCEAAU1CW227Y 220MFD, 16V, Aluminum AB VCEAAU2AW227Y VCEAAU1CW106Y VCKYPU2HE103P VCOYKU1HM104K 220MFD, 100V, Aluminum lOMFD, 16V, Aluminum O.OlMFD, 500V, Ceramic O,lMFD, Mylar AF AB AB AB AA DESCRIPTION CAPACITORS C2001 C2016 ( C2050J V f-l D-ST2F F 154J R2031 R2032 R2036 R2047 R2048 R2049 AD R2007: R2050; R2008 R2028 AD AA V RC-MT2HG 102J VRD-ST2EF225J R2023 ~ f-l2026 ~ R2025 5K ohm, Variable Resistor for Volume 47 ohm, 1/4W R2005 R2006 ~ RVR-B7032TAZZ r 500 ohm, Variable Resistor for Contrast 1 K ohm, 1/2W 2,2M ohm, 1/4W I R2046 C2002i C2036 C2037J C2003 C2004 C2005i RESISTORS R2011 R2024 R2027 R2037 R2012 R2013 f-l2014 R2015 R2016 R2017 PART NO. R2051 &. VRD-ST2EF120J D2005] f-lH·DX0039TAZZ 02008 D2006 1 D2009) RH DX0043TAZZ D2007 REF. NO. C20061 C2007J C20081 C2012 C2009 C2010 C2011i C2030j C2013 C2014 C2015 C2017 C2018i C2019 J C2020 C2021 C2022! C2029 [ i C2023 C2024 C2025 C2026 C2027 C2028 C20321 C2039 C2040 C2041 ( C2042! C2043 I C2046J C2033 C2034 C2035 C2038 C2044 C2045i C2047 ( C2051 J C2048 C2049 C2052 C2053 AC AB AG 'I TRANSFORMER AND COILS T2001 RTRNTOOl7T AZZ T2002 6. CTRNF2072TAOl RCI LH4070TAZZ -45- H-Drive Transformer High Voltage Transformer Retrection Coi I AF AY AX MZ-80K PARTS LIST REF. NO. PART NO. L2001 L2002 RCILB0021TAZZ RC I LZ0057T AZZ DESCRIPTION H-Hold Variable Coil H-Lin Coil CODE REF. NO. AG AG MISCELLANEOUS ...• (lPWIF0261PAZ.Z.· PRDAF0147TAZZ PRDAF0107TAZZ OSOCV0701SEZZ OPLGN0404CEZZ OSOCNOO77PAZZ OCNW-0009PAZZ 2 GCABC8004PASC GWAKPOOOl PASC GCOVZOO05PAZZ LANG BOO02PAZZ LAN G B0003P AZZ DDAI-0004PAZZ PSHEFOO07PAZZ LANGOOO05PAZZ LANGSOO03PAZZ LANGSOO13CEZZ 3 4 5 6 7 8 9 10 11 12 /J:. V824ONB411KtE 13 14 15 VSP0080P-16Y A PFTA-0001 PASC HI N DP0005P ASA MSPRT0011PAZZ 16 *** DBOXDOO04PAZZ DOBXDOO05PAZZ Radiator Radiator CRT Socket 4-Pin Plug Lead Wire with 6-Pin Socket Lead Wire with 2-Pin Socket (to Speaker) TV Cabinet Front Frame Front Panel Support Angle A Support Angle B PWB Mounting Plate Guard Net for Speaker Display PWB Fixing Angle Speaker mounting Plate Speaker Holder I f R4041 R504 VRW-KT3DDR05K 0.05 ohm, 2W, Cement AC R4051 R505 VRD-ST2EF563J 56K ohm, 1/4W AA AB AB AC AB AH AD VRD-ST2EF472J 4.7K ohm, 1/4W AA VRD-ST2EF153J VRD-ST2EF332J VRD-ST2EF392J 15K ohm, 1/4W 3.3K ohm, 1/4W 3.9K ohm, 1/4W AA AA AA BC AS AN AE AF AR RVR-M0010PAZZ 1 K ohm, Variable Resistor AC AB AB AD AB C101 {jj;. RCCZ0114f1AZZ O.047MFO, 2.5OV. Mylat" AK C2011 C404J C202 VCEAAU 1CM228Y 2200MFD, 16V, Aluminum AF VCEAAU1AM477M 470MFD, 10V, Aluminum AD VCEAAU 1VM258Y 2500MFD, 35V, Aluminum AG VCSACU 1VE 106M 10MFD, 35V, Tantalum AE VCOYKU1HM332K VCOYKU1HM223K 0.0033MFD, 50V, Film 0.022MFD, 50V, Film AA AB C4051 C506 J C508 VCOYKU1HM183K 0.018MFD, 50V, Film AB C4061 C504 C505 VCOYKU1HM102K O.OOlMFD, 50V, Film AA R507J R508 R509 R409 R410 R510 VR2011 VR401 VR501 I CAPACITORS C3011 C302 CAT SM Speaker Back Panel I ndicator Panel of Control Knob Spring AO AH AE C303[ C304 AB C501J C502 C402 C403 *** Assembled Power Supply Unit Assembled Power Supply Unit (for UK) INTEGRATED CIRCUIT ICl IC2 IC3 CODE R4071 R408 .•. .fri~. Wirq POWER SUPPLY UNIT SECTION DESCRIPTION PART NO. AR RH-IX0178PAZZ Regulator, /lA78MGU RH·IX0151PAZZ Switching Regulator, SG3524 AT C4011 r C407 } C503 C507 VCKYPU1NB104Z 0.lMFD,12V,Ceramic AB VCEAAU1AM338Y 3300MFD, lOV, Aluminum AF , TRANSISTORS 0401 1 0501 J 0402 1 0502 J AN VS2SA764///-1 2SA764 AC VS2SA673-C/1 E 2SA673 DIODES 0201 0301 0302 0401 0402 0501 0502 VHDRU2////J.l VHDSS5R////-l VHDSS5/////-1 RU2 SS-5R SS-5 VHDUF3/////-1 UF3 L201 L4011 L502 J L4021 RTRNZ0010PAZZ Filter Coil AH RTRNZOO07PAZZ Choke Coil AP L501 RTRNZOO09PAZZ Fi Iter Coil AL f AE AT AT AK MISCELLANEOUS RESISTORS R201 R4011 R501 f R402 R403 R406 R502 R503 R506 COILS AND TRANSFORMER VRD-ST2EF123J 12K ohm, 1/4W VRD-ST2EF101J 100 ohm, 1/4W AA AA &. ~F026QPAZZ Printed Wiring Board fZ1011· .•.. •...... .f:_., nst'IOmA F301~./J:.~FS.c(lg02P~ZZ ,',', F202 h OftS4KXl1PAU: .. •.FtlM.f:n$nA F4011 /J:.;OF~Azz cFIO.11 ..... OFSHC0001 PAZZ VRD-ST2EF272J 2.7K ohm, 1/4W AA -46- AM AO AO ~1:I$8,n •.6A AD Fuse Holder AD ~ .•. MZ-80K PARTS LIST REF. NO. PART NO. 19 20 21 GCABA8018PASA GCABB8018PASA GCABB8019PASA PROAR0010PAZZ OSOCN0016PAZZ 22 LBSHCOO03PAZZ REF. NO. OESCRIPTION Cabinet Cabinet Cabinet (for UK) Radiator Lead Wire with 4-pin Socket Rubber Bush PART NO. DESCRIPTION COllEj CAPACITORS AF AB C3001 C3002 C3004 C3006 C3008 C3003 c30051 C3007 J C3009 VCEAAU 1AW476Y 47MFO, 10V, Aluminum AB VCOYKU1HM104K 0.1MFO, Mylar AB VCEAAU1AW106Y 10MFO, 10V, Aluminum AB VCOYKU1HM102K 1OOOPF, Mylar AA VCEAAU 1AW226Y 22 MFO, 10V, Aluminum AB Printed Wiring Board SI ide Switch (2 contacts). Cassette Tape Recorder Machinical Unit (Refer to other table for detailed parts) Cabinet Button Flap Indicator Plate of Function Buttons Plate Crossarm Brace Spring Lead Wire with 6-Pin Socket AF AG BG MISCELLANEOUS * * * CASSETTE TAPE RECORDER SECTION * * KTRC-0004PAZZ Assembled Cassette Tape Recorder Unit RH·IX0150PAZZ OP Amp. IlPC358C AK TRANSISTORS 03001 03004 03002 03003 I J 25 26 27 28 GCABE8004PASA JKNBROO02PASA GFTAC0001 PASA HI N OMOO06PASA 29 30 31 32 HOECB0010PASA MSPRP0089AGFW MSPRB0029PAFJ OSOCN0078PAZZ BT INTEGRATED CIRCUIT 13001 24 OPWBF0259PAZZ OSW-S0011V AZZ KMECA0001 PAZZ SW3001 VS2SC372-Y/1E 2SC372Y AC VS2SC1627·Y-A VS2SC1681//-1 2SC1627Y 2SC1681 AD AD VH01S1555//1 A 1S1555 AA AP AC AN AG AC AB AA AH DIODES I 03001 03002 03003 03004 J r * * * KEY BOARD UNIT SECTION * * * OKEY-0005PAZZ Assembled Key Board Unit BX Printed Wiring Board Mechanical Key-Mounting Plate Mechanical Key Switch Key Top (small) Key Cover (small) Key Top (double size) Key Cover (double size) Lead Wire with l8-pin Socket Key Seal AN AN RESISTORS MISCELLANEOUS R3001 } R3003 R3002 R3004 R3015 R3022 R3023 R3005 R3006 R3007 } R3011 R3008 R3009 R3010 R3012 R3013 R3014 VRO-ST2E.F471J 4,0 ohm, 1/4W AA V R 0-ST2E F 103J lOK ohm, 1/4W AA V RC-MT2HG4 70J VRO-ST2EF822J 47 ohm, 1/2W 8.2K ohm, 1/4W AA AA VRO-ST2EF473J 47K ohm, 1/4W AA VRO-ST2EF224J V RO-ST2E F 153J VRO-ST2EF470J V R 0-ST2E F223J VRO-ST2EF 154J VRO-ST2EF222J 220K ohm, 1/4W 15K ohm, 1/4W 47 ohm, 1/4W 22K ohm, 1/4W 150K ohm, 1/4W 2.2K ohm, 1/4W AA AA AA AA AA AA VRO-ST2EF103G 10K ohm, 1/4W AA VRO-ST2EF560G VRO-ST2EF562G V R 0-ST2E F205G VRO-ST2EF102J 56 ohm, 1/4W 5.6K ohm, 1/4W 2M ohm, 1/4W 1 K ohm, 1/4W AA AA AA AA 33 34 OPWBF0167PAZZ LANGOOO03PAZZ 35 36 37 38 39 40 41 OSW-K0001 PAZZ OSW-KOO09PAZZ OSW-K0010PAZZ OSW-K0011PAZZ OSW-K0012PAZZ OSOCN0079PAZZ HINOPOO09PASA AD AB AB AC AC AM AK R30161 R30171 R3019 R3018 R3020 R3021 R3024 **** OTHER SECTION **** DIODES 42 -47- RH-PX003l PAZZ LEO,GL-53RG AF MZ 80K • PARTS LIST REF. NO. PART NO. DESCRIPTION CODE REF. NO. MISCELLANEOUS 43 44 45 46 47 48 49 50 51 52 QPWBF0172PAZZ QSOCN0080PAZZ DCABA8042PASA GCABB8017PASA DANG-0006PAZZ LH LDF0011 PAZZ GLEGROO01PAZZ MHNG-0001 PAFC MARMM0019PAFC QACCK0050AFZZ QACCB0001 PAZZ LBNDC0001 PAZZ 53 Printed Wiring Board for LED Lead Wire with 3-Pin Socket Cabinet Cabinet Arm Fixing Angle with Screw CPU Board Holder LEG Hinge Support Arm A.C. Cord A.C. Cord (for U K) Cord Keeper AB AE BL BD AE AB AB AQ AQ AQ AQ AC 54 55 PART NO. LH LDW9003CEZZ TI NSGOO02PAZZ TINSEOO01PAZZ TINSFOO01PAZZ HI NDP001 OPASA HINDMOO07PASA PCOVP0015PAZZ DESCRIPTION Cord Fixer, HW-146 I nstruction Manual (Germany) Instruction Manual (English) I nstruction Manual (French) Key Seal (letters with unlaut) Decoration Panel Cover CODE AA BG AD AK AG (Note) Be sure to use genuine parts for securing the safety and reliability of the set. Parts marked with "&" and parts shaded (in black) are especially important for maintaining the safety and protecting ability of the set. Be sure to replace them parts of specified part number. -48- ~ ? I ~ , @ 5 1 I , r ./ Qi~ ~"...... @ Y '120' 1 v-1 ( H, V) I . L---1 @--i • • I B 1 9) ..,/ ' c h r;;:;-. '® 27 ~ '--0' -B 66 65 106 I @@ 71 72 EJECT LEVER ASS'V (H, VI cJ f-.. O/ • r-e 17 A @'- I @-- "' 100 ID. 115 99 98 B2 58 60 6' 62 64 65 69 70 72 73 7' BO 53 54 3' 40 36 37 3B 22 24 25 27 2B 29 32 33 35 21 19 15 17 "" 11 ,.• 3 4 5 B 2 NO . REF . I 94A00280KCTRM 94ROO380KCTAM 94AOQ480KCTRM 94ROOsaOKCTRM 9 4R008 80K CTR M 94R00980KCTRM 94R01080KCTAM 94AOl180KCTAM 94R01280KCTRM 94RO'480KCTRM 94R01580KCTRM 94R01780KCTAM 94R01980KCTRM 94R02180KCTRM 94A02280KCTRM 94R02480KCTAM 94R02580KCTRM 94R02780KCTAM 94A02880KCTRM 94R02980KCTRM 94 R03280KCTRM 9 4R 03380KCTRM 94R03580KCTRM 94R03680KCTRM 94R03780KCTRM 94R 0 3880K CTRM 94A03980K CTAM 94 AQ4080KC TR M 94A05J80K CTR M 9 4 A05480KC T RM 94R05880KCTRM 94R06080KCTAM 94R06180KCTRM 94R06280KCTAM 94R06480KCTRM 94R06580KCTRM 94R06980KCTRM 94R07080KC TRM 94R07280KCTRM 94R07380KCTRM 9 4 A07980KCTRM 94R08080KCTRM 94R08280KCTRM 94R09880KCTRM 94R09980KCTRM 94R,0080KCTAM 9 4Rl0 180KCTAM 9 4R11580KCTRM 94R 11980KCTRM PART NO. Main Boss Re<::ord Safllly LIIVllr Spring Record Sa/lilY Sporkc Au'y Head Block Spring Spring Co llllr RP. Head Spflng P,nd, Rollllr Au' y Spring Take'up Reel Au 'y Supply Ree l A~ s'y R f Clutch Au'y Sprong F ,F . Idlllr A rm An'y Spflng Flywheel Holder Thr uH Spring Flywhllel Bearong Auto·S top Lever Spnng Main Plate Spring Rllw ind A rm Play Sl ide L llver Caller L eaf Switch Count er Countllr Belt sensing Platll A~s'y R IP Head Era$ll Hllad Pack Spring Motor Ma,n Belt Motor Rubbe r Motor Pu lley Coller Screw{s) Flywheel Capltan EJllct Lever A~s'V Spri ng Push Button A n'y Brakll Arm Sj:>roog Brake Shoe Brak e Arm Shaft Nylon Wa~her 2.2)( 7 )( 0.5 REC PU$h Platll DE SC RIPTION Cassette tape recorder mechanical parts BRAKE ARM ASS'V (H,V ) PACK SPR IN G {H, VI (H) MOTOR BRACKET ASS 'V @ . SENSING PLATE ASS 'V rH,VI FLVWHEEL CAPSTAN '8 ,[,-,-1 I L E HEAD ASS'v (H , V) @-I PUSH BUTTON ASS'V E (H) COUNT ER ASS'V AH AB AK AF AN AB AL AB AF AB AA AO AB AF AB AC AC AA AG AM AF AF AM AG AD AV AH AA AD AB AP AK AB AW AO AB AB AB AA AC AO AB AC AB AO AO AB AB AA ICODE MZ 80K ® 1- "", . -. . L.·;'~'.. " - __ ® . Fig. Display Section 53 MZ-80K o o Fig. Power Supply Section -54- MZ-80K j j j j j j j j j j j j j j j j j j .~ r . j j j ...it j j j j j Fig. Cassette Tape Recorder Section -55- j j j I ®--g 1-(----+-~--(@) @~ @-----r==J ?-{--~y@ 00000000 0000000 0000000 000000 000000 Fig. Key Board Section and Others -56- E810905 HO. Printed in Japan