Download MZ-1E24 Service-Manual GB - The Sharp MZ
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MZ-1E24 SHARP SERVICE MANUAL OOZMZIE24///E RS-232C I NTER FACE (FOR MZ80B, 700, 800) MODEL MZ-1E24 r---------------------CONTENTS----------------------~ 1_ General··········································· 1 2. Features·········································· 1 3. Block diagram····································· 1 4. Hardware description··························· ... 1 5. Jumper block description··························l 6. Port address assignment························ ... 2 7. Port rate setup for each channel··········· ·······2 8. Connector signal mode·························· .. · 3 9. Troubleshooting······························ ..... 4 10. Use of the diagnostic program····················· 5 11. Circuit diagram·································· 6 12. Parts l i s t · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 8 SHARP CORPORATION - M Z·1E24 2) Bit rate generator 1. General The MOTOROLA MC144l CMOS Bit Generator is used with the external 1.S432MHz crystal oscillator. As ten kinds of baud rates are obtain- The MZ-lE24 is an RS-232C interface card which can be used for the MZ-700, MZ-SOO, and MZ-SOB. ed on the output, the user can se- 2. Features lect the desired rate. ·Incorporation of dual channels per- 3) Driver mits independent data transmission and recept ion. The SN75lSS is used for the line driver. The supply voltages are: VCC+=12V, VCC-=-12V. ·Ten modes of baud rates can be chosen by the jumper on the card which can be set independently for each channel ·States of connector output signals 4) Receiver to the external device can be assign- The SN75lS9A lS used for the line receiver. It operated under single supply of 5V. ed to the terminal or modern mode using the jumper. ·The following jumper assignment can be attained using the jumper. BI mode (MODE 1): MZ-SBI03 compatible. ST mode (MODE 2): Sharp standard RS-232C mode. 5) Z-SO SIO/O The ZSO SIO/O is used for the serial I/O drive. 5. Jumper block description 3. Block diagram ADDRESS pECO- DER JB-AI: Selection of BI mode* and ST mode* for the channel A. JD-El : Selection of BI mode* and IDode* for the channel B. All jumpers in the - CE DRJVER I Z-80 sra/o WI THCRYSTAL . Vcc+=+ 12V Vcc-=- 12V I BI ST BI mode REdmI- VER I-- RATOf TTLLEVEL jumper block must be set to the same mode. DRI VER'S SUPPLY VOLTAGE A ChtLnnel B Channel BIT RATE GENE- same sr ±12VL EVEL BI ST mode sr Do not make all jumpers connected in otherwise connection. *BI mode It is the mode compatible with the MZ-SBlD3. It has to be set in this mode when operated under the system software (i.e. DISK BASIC) which supports the MZ-SBI03 to the MZ-SOB. 4. Hardware description 1) Address decoder From the CPU is issued an S-bit output for port assign address. Since four successive ports are used with four port assigning the S-bit switch. the MZ-lE24, a successive addresses are chosen by the high· order 6 bits of output using the dip - 1 - *ST mode Standard RS-232C compatible mode. It has to be set in this mode when the MZ-800 or the MZ-700 (operated under DISK BASIC). --1_--MZ-1 E24 JB-A2: JB-B2: For JB-A3: JB-B3: Selection of the baud rate for the channel A. Selection of the baud rate for the channel B. detail, refer to Section 7. Sel"ction~0f the terminal and modem mode for the channel A. Selection of the terminal and Logic level 1 0 1 1 o 0 x x '---v----" '"----v-----' 0,1,2,3 B fiX" o or represent either 1. ------~~~--~mo~d~e~m~mo~d~e~f~o~r:;t"h~e~c~h;a;n;n~e~I~B~.~------~In~e~~aaa~b±t-kr-is-tt~f&F-&~l~~c~-----JB-M : tion of the Z-80 sro channel. The address bit AO is used for selection of the Z-80 sro command or data. Setting up the RS signal The RS (Request To Send) signal is set to high by installing a jumper chip on the ON side of jumper block JB-M. ON OFF 10 I • • I . Sett1ng up • s1gnal for 1088 i I-Setting up (Factory setting) signal for 5 ~ the RS channel B the RS channel A Jumper chips should normally be installed in the OFF position. 0 0 Data, channel A 0 1 Command, channel A 1 0 Data, channel B 1 1 Command, channel B Choice For the MZ-80B, 700 and 800: The Z-80 CPU issues an 8-bit output for the port address. Since four successive ports are used with the MZ-lE24, a successive four port addresses must be selected by assigning the high order 6 bits of the 8-bit address output using the dip switch. 1 2 3 4 S 6 A2 A3 A4 AS A6 A7 ON ON OFF OFF ON OFF Switch position ~ 'The baud rate must coincide with the specification of the software used. 6. Port address assignment Dip switch number Address bit Factory setup Al 7_ Port rate setup for each channel As two channels, A and B, are provided for this card, it is possible to set baud rate independently for each channel. The desired baud rate must be chosen out of ten baud rates by making shortpin connection on JB-A2 and JB-B2. The JB-A2 is used for the baud rate assignment of the channel A and the JB-B2 for the channel B. Short pin 1 4 8 2 3 9 5 6 7 10 location Baud rate 75 110 150 300 600 1200 1800 2400 4800 9600 Logic level '"".- ON 0 OFF 1 BO-B3H ." .. '-"'-" Notes: Never try to insert more than two short-pins at the same time as it may possibly invite a destruction in the rc. Proper communication would not be enabled, unless the baud rate is identical at both sides. The port addresses, therefore, have been set to BOH, BlH, B2H, and B3H at the factory. - 2 - -MZ-1E24 8. Connector signal mode There are two 9-pin connectors used in this card. Channel A connector (1) \ ® ® ® ® ) (!) Gl ® Gl ® Channel B connector ® ® (!)\ ® ® ® @ Gl ® Gl ® ) (!) Fig.4-2. Connector pln configuration Signal assignment on connector pins can be altered by changing jumper block connections, by which the channel can be assigned to either terminal or modem mode. RS-232C compatible signals are obtained in the terminal and modem mode. That is, binary signals are transferred in the voltage level. ·Signal description Pin No. Terminal mode ~l Channel A 4 5 Terminal mode Yes Yes 6 Modem mode Yes Yes 7 Table 4-4 Pin description 2 3 4 5 6 7 8 9 Transmit data Receive data Request to send Clear to send Equipment ready Data set ready Signal ground N.C mode FG SD RIi RS CS to send Data set ready Equipment DR ready Signal SG ground ER readv Signal ground Ready to receive 9 RD Transmit data FG RD SD RS N.C CS Ready to receive ER Device ready Equipment DR ready_ SG Signal ground Clear to RR send RR DR ER SG CS The following alteration takes place when set to the modem mode. Modem mode Sefety ground Receive data Transmit data Clear to send Request Device 8 Table 4-4 shows connector pln assignments in each mode. For the pin number, refer to Table 4-2. Connector Terminal pin No. Safety 1 ground data Receive data Request to send Clear to send Equipment ready 3 ChannelB Safety ground SD Receive data FG Transmit 2 Table 4-3 Channel mode Mode Safety ground 1 Modem mode FG { RD BI mode ST mode 2==-a 2==a 4 I 6. • 5 • 7 { 5.. • 9 6 • 7 SD ·It has to be set in the terminal mode when uSlng the acoustic coupler. CS RS ·Normally, it is operated in the modem mode when the MZ-lE24 is connected with the RS-232C interface incorporating printer and plotter. However, thorough reading of the instruction manual is required in order to make proper use as there may an exemption. DR ER SG N. C - 3 - --~-~--. MZ-1E24 As the diagnostic program consists of the board test and communication test, the diagnostic program must be operated depending on the trouble phenomenon. oTo make direct connection with the computer without intervention of the modem, the following cable connection is required by operating the one of sides in the terminal mode ·If the board test has not been completed successfully, there may the following possible cause: and the other side in the modem mode. 1 1 Z 2 3 3 4 5 4 5 6 7 8 9 6 7 8 9 1. Check for proper supply of the clock (BUSO). 2. Check for a failure in the dip switch. 3. Failure in the L804 or LS266. 4. Failure in the 810. ·If the communication test has not been completed successfully, make test in the following sequence. 9_ Troubleshooting The diagnostic program must be used for troubleshooting (see Paragraph 10). Check the bit rate generator. out Check the crystal oscillator. Program in operation. ChecK if SD is on. es Check if ±12V is on across C. if RD is on across D. no Check fora data bus and SIO failure. no Check the 75188 DC/DC converter. no Check the cable and jumper. no TTL level seen:::·>----l Check the 75l89A. .FailtJre in the SIO Address decoder Data bus A SIO r- j SD r---~ Cable RD X' tal Bit rate genera tor - 4 - MZ'1E24 Then, the port No. outputted. 10. Use of the diagnostic ptogram B3, F7 is 1. Make the monitor connected with 8. Next, push the space bar. The following message will appear if entered correctly. the MZ-800. ~ IMZ A TO ~L.--,,8-,,-00,,-, 2. B OK B TO A OK It will be in a failure if only either side is on display with the control waiting for a command entry. Insert the diagnostic cassette tape in the MZ-800 and load the diagnostic program. 9. The test has been successful up to Step 8, push the space bar to return to the port test. After changing to the ST mode, repeat the communication test. Also, test the channel A in the M mode and the channel B in the T mode. 3. Set the MZ-lE24 to be tested in the following manner: 1) Dip switch /jos.l, 3, 5 ... ON 2, 4, 6 •.. OFF 2) Set the JB-A3 to the T side, 'Baud rate test th the JB-B3 to the M side, and the JB-Al, BI to the BI mode. Apply the universal canter probe to the JB-A2, B2. Check if the following frequency is observed. 3) Set both switch of the JB-M to the OFF side. 4) Set the JB-A2, B2 to the 1200 mode. 9600 4800 2400 1800 1200 600 300 150 4. Mount the MZ-lE24 to the slot of the MZ-800, and connect the test cable. 5. Enter A8H, which has been already set, for the port address as prompted on the monitor screen. 153.6K 76.8K 38.4K 28.8K 19.2K 9600 4800 2400 1760 1200 110 75 6. Push the space bar to get the port address on display. The following message will appear if entered correctly. (Only three digits are effective.) 'Signal level test During the communication test, apply the probe to the SD signal jumper block of the JB-A3 and check if ±12V is observed • PORT NO = AB 7. Turn the dip switches, 2, 4, and 6, to the ON side; and 1, 3, 5 to the OFF side (=54H). Push the@key. The following message will appear if entered correctly. • JB-M tests Apply the probe to the RS signal jumper block of the JB-A3. Check if RS is stable at +12V when the JB-M is ON. PORT NO = 57 Parts code Description Diagnostic cassette To perform the communication test, UKOG-l038ACZZ set the dip switches, 5, 2, and 1, to the ON side; and 6, 4, 3 to the OFF side (=80H). Push the CR key. UKOGGI035ACZZ Test cable - 5 - tape Price rank BB BK i It I ~ :a ... .~ ~ ,~ U • ~ A2A3 A4 AS ,,_ ., 471J I _._"). ''''''''6 ,-o+5V _ I : X6 =.::."J "__ ~+'" '" -12 v "tj:"47 U " ~"5V - J>-- l-/ --JDO-t rj---JLH .. I • ~ ,J[>----l 1Pb:::>-+ I +5V~OC-Df • CON GND LSD4 0 Tl(DB~ RXOS 28 SI 3 " 00 ""," 3 D2 3 .5 " 07 7 rEO =1 1!XTWl~ TXO,QI 8 Jrr$Ii. 17 Ell /' , : 91 ST ' I ION ~ 'J·-6~Ff J8-83 I ~ __ I 91 ST -.1 ~ ~----Ol- JB-B1 : ,- ~~__"-~~-+-+~r,o ~HP----------~~ 75"'" 12V tm---d5+ +5V oo1.7K 751B!!A 1- , i1lf'?!t'iffOP 19-2--JJB-B1 ~+12V " A SLOT .5 02 ,; " "'~T' ____________.J~ I I I I I s~ RR" R 3 ~ :~~i--------------!;Jj J_~~!\3, , ~, OO 57 ' ~ ~ Ra 9PIN C()lNECTER BI JlFA1' I U:- ' ~' , _ 0:- j~! i 11111 ~:~ -----' 05 ~ 7; OR ~ "07 9TRR Jro "" • lIT fU111l ffI!£1l IEI IEO RESET ") 21 (NI'II) GNO 20 19: 'ElTfIT f7; ,. ,.,. GNO 14 (HALT) 10 11: 04 SIDE E +5 03 " 4, 5' 5' .' 7 (A15 ) (A 14) (,01.13 ) (1.12 ) (,01.11) "13 01 00 ONO ," ________~-!£-9 , ~! ~: IF " b:j,<.------~:i -12V __ , sS===~~ ::~~=f-o '2 ' ~ O=Q.<'i=====J-ll!~ 1 D1 00 01 D2 '03 38 D4 03" "01 04 05 mm RT TIlT """"" 20 BUSIII 1trr H1 BUSSI rn.-r '" 34 B/A R""'ESTI S -;-00 -o!-'-t~f2'51~.'~4---t~)r , ' r 0Tll'\~ 6 lE ~"'5V -"12V : 81 57: :: :112"='=' 71T TTT TTT 19 1rmI~ 9 VCC i:I: 31 (;ND i rm~-' ~ III +5V :0 0 "'-;c;;-;c;----------' I ' 1 , 'S,-S;:" J B-A1 Gt.J 12 A" vcc.~";--_.J REn ~-2 , ~ "I +" 2 33,~ ~ Al RESH 1E0 IEI tOM M C14 4 11 24PIH (AID) (A 9 ) CA B ) A7 AS A5 A3 .. A2 Al AO GNO '" MZ-1E24 Pattern d" "'.'" m - _-1. Jumper wire - 7 - .. ------MZ-1E24 12. Parts list rn Electronic parts PARTS CODE NO. DESCRIPTION lort ocket) ine) N:s 3 :z lip swi -TA A z i ~line) NV ~7 uF1 iP) :N ' 6.5<hXlOl AA . V /- i i V v V ~ ,I I /6//- i i ))- NV . )uF: I _A/= ±5%) i D I ))- I a i :0" : ±5%' W IOMO ±5%' [2J Packing & Others DESCRIPTION .H 2 (20Qlfun) _abe In., N C 8 1-: . PWB book ;Crew I X IOK) ut (31 - 8 - SHARP SHARP CORPORATION Industrial Instruments Group Quality &. Reliability Control Center 492 Minoshocho, Yamatokoriyama, Nara 639-11, Japan Feb. 1985 Printed in Japan