Download SERVICE MANUAL

SERVICE MANUAL
GxpGrl
FD-760
Stereo Cassette Deck
SPECIFICATIONS
Track
Tape
System
Speed
WowandFlutter
4-track 2-channel, stereo
recording
andplayback
. 1-718 i.p.s. (4.75 cm/sec.)
... O.\Yo(WRMS)
lnput Sensitivity/lmpedance
MlC..
LINE .
DlN..
...0.3mY/4.7kohms
. . 40 mV/8.2 kohms
...0.5mV/3.3kohms
Frequency
Response ...50-17,000H2(Metaltape)
50 - 16,000 Hz (CrOu, tape)
50 - 14,000 Hz (Normal tape)
Output Level (at Dolby level)
Sisnal-to-Noise
Ratio .
. . . . 53 dB (Dolby NR off,
GENERAL
LINE.
.
...400mV
DIN .
.
.
800 mV
(Dolby NR off)
or
Power
Metal tape, CCIR/ARM weighted
Consumption
400
Power
Hz)
The S/N is improved
DolbyNRon.
Harmonic
Distortion ... 1.8Yo(at1 kHz.0VU)
Erase Ratio
. 65 dB (at 1 kHz,OVU
Fast Forward and
RewindTime . . . . . . 90second (C-60tape)
Total
CrO2
15 watts
. AC 22OY SOl0OHz
by 9 dB with Dimensions .. 442lWl x297 lDl x 133(H) mm
Weight(Net) ......5kg(l1lbs.)
Accessory . . Shielded Audio Cables (2)
Supply . . . .
.
+ 10
dB)
Specifications and design are subject to change without
notice.
FRONT VIEW
U meter
KL-258T-6
Push Button
(x 6)
N42052-SS
Cassette Key Cap
N4153&SSR
REAR VIEW
rr-r
ra,rrrt
a /ar
Lart
o
arDat
Foot
No.7102
Knob 44
N41660
Cassette Holder
N 2031 5
V
Bottorn
N20574
-2-
Cassette Key Cap
N41 53&SS
(x S )
Knob
21
N41661
ALIGNMENT PROCEDURE
(For Alignment points see page 5.)
Set the position of Rec. Volume to Max., and of Bal. Volume, Bias Adj. to Center in allalignment.
1)
Head Azimuth
RIP
HEAD
OUTPUT
PLAY AMP
I
DOLBY
AMP AMP LIN E OUT
QVM
Controls to be positioned
Dolby
NR
MPX
Tape Selecto
r
Function
Test Tape
: OFF
: OFF
. NO R MA L
: PLAY
P
MTT.114
1
) Adjust the
roced
u re
head mounting screw in order to
obtain max. V.M. indication.
U
VU METER
\-
2l vu Meter LrN E rN
DO
OUTPUT
METER AMP
LBY AMP
ADJ
400H2
+2dB (DOLBY LEVEL)
CONF IRMED OUTPUT
VO LTAG E
TP705, 706
Contro ls to be positioned
Test Tape
Dolby NR
MPX
: OFF
: OFF
Normal
Tape Selecto
. NO R MA L
: REC.
r
Function
100mV
P
\-
PIay Back Level
RIP
H
EAD
u re
1) Apply 400H2, approx. 40mV signal at the LINE
lN terminal.
2) Make the voltage at TP705 and TP7 06 be 100mV
by adjusting applied signal level. (GND: TP710)
3) Set the VU meter indication to DO LBY LEVE L
(+2dB) (double D mark position) by the
adjustment of SV RB 1 1 an d 812.
BIank
\3)
roced
V.M = 100mV
PLAY AMP
DO
VU METER
OUTPUT
METER AMP
LBY AMP
+2dB
ADJ.
TP705
Controls to be positioned
Test Tape
NR
MPX
MTT.150
Dolby
Tape
Selector
Function
: OFF
: OFF
: NO R MA L
,706
P
roced
u re
just SV R 70 1 an d 702 to make the output
voltage at Dolby testpoints of TP705 and 706 be
100mV. (G N D: TP7 10)
Ad
: PLAY
-3-
ALIGNMENT PROCEDURE
4l
Bias Trap
/
TP7071708
Bias Voltage A ,^ , ,,
R
ECOR D EO AMP
B
IAS-OSC
APPROX. 60KHz
ADJUSTMENT (A) (BIAS TRAP)
Controls to be positioned
Test Tape
NR
MPX
Blank
Dolby
Tape
Selector
Function
: OFF
roced
P
u re
justing L703 , 704 to m in. ind ication on the
V.M. scale at the Test point of TP7 07 and 708.
(GND: TP709)
Ad
: OFF
. METAL
: R EC.
ADJUSTMENT (B) (BIAS VOLTAGE)
Dolby NR
MPX
Tape
Selector
: OFF
1) Connect V.M. across TP7011703 and TP7021704.
Blank
Metal
X L-II
: OFF
: METAL
BH
Step
Appro x.
Voltage
Ta pe Se lecto r
I
1 [
F-60
J
MErAL
T
ao mv
2 | rxrRA(croz) | b5mV
3 [ NoRMAL | _1x ly_ _
EXTRA
J
NOR MAL
Adjust
SV
R
707 ,7OB
SVR2
SVR
1
NOTE: The Bias Voltages indicated in the above table do not necessarily correspond to the best recording characteristics of dynamic range, distortion, frequency response, etc.
Make some adjustments according to the best values actually obtained.
5)
Recording Level Caliblation
DOLBY AMP
R
ECOR D EO AMP
{-ADJ
LINE IN
RIP
H
400H2
EAD
TP705
Controls to be positioned
NR
MPX
:OFF
Tape
. NORMAL
Dolby
Selector
OSC
Test Tape
/706
P
: OFF
1
roced
u re
) Apply 400H2, approx. 40mV signal at the
LINE lN terminal.
2l Make the voltage
at TP705 and TP7 06 be 100mV
by adjusting gpplied signal level.(GND:. TP7 lOl
3) Set the SVR705 and 706 to the mechanical
center.
Record the signal into the test tape.
5) Play the recorded signal and check the output
voltage at TP705 and 7OG being either 100mV
or not. lf not, adjust SVR705 and 706, and
then repeat step 4l and 5) untill 100mV is
obtained.
4l
-4-
ALIGNMENT POINTS
TP 7oe
t
Prrro,
O nlss
R
745
EC/PLAY LEVE L
)5
703
irj-
SV R 701
(L)
0
,,^.
704
PLAY BACK LEVEL
(R)
*
DCA.196
IAS
(CrOz
SVR
1
R
'06
METER
B
F
co
756
vP TP708
co-21 1A
E.
(n
g
BIAS (METAL)
,D'II,'O'
o-
)
(NORMAL)
-5-
CASSETTE AMp WTH DOLBY NR BOARD (DCA-196)
e B3d
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DIN AMP BOARD (DRA-lgO)
TO POWER SUPLLY,
EO & AMP
PCB
(PEA -286)
7O MIC AMP
PcB(MlA-t9l)
TO POWER SUPPLY I
EE
}
AMP
(pen-2s6
a.
PCB
)
ll
!t
L---J
^
BIAS OSC BOARD (CO-211A)
MIC AMP BOARD (MIA-191)
TO VOLUME
PCB(VR- 193)
TO CASSETTE AMP WITH
DoLBY NR PCB(Dcr-t96)
CONTR OL
f
I
I
I
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TO PoWER SUPPLY, E0
f Al,lP Pc B ( PEA-286)
TO
ERASE HEAD
TO DIN
AMP
TO
PCB(DRA-I90)
C
ASS E
TTE
AM
P HTH
DOLBY NR PCB(DRA. I96 )
-8-
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02 2SCr3?' S I
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LAMP ( tuclu
oe vu
METER )
r00tt
r0.
ex?.
(P[-
r95)
iirros-l-_.--A0230
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-12-
EXPLODED DIAGRAM
CASSETTE MECHANISM (CT.37O9B)
--9=
r%
lt:M)
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ffi
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-11-
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PARTS LIST
CASSETTE MECHANISM (CT-37098}
Part No.
v291 0
Spring Tube
B0690
T
Pinch Roller Ass'y
U ld le r Ass'y
F F t'd ler Ass'y
Supply Reel Ass'y
Take Up Reel Ass'y
Counter
v3870
v4140
Sensor Arm Spacer
Case Lock Arm Collar (B)
Motor Pu I ley
8O720
c0330
U
K2070
N0240
ao240
o0870
o1740
o1760
o1780
o1790
o1800
o1810
o1820
o1830
o1840
o1850
o1870
o1880
o1890
o1900
01910
o1920
r,
(M P-390 -3231
F0120
G 0230 ( H2331 -01 1 0)
G 0320 (H53203-05)
G1240
G1290
G1300
G 1310
G1320
c 1 330 (MM r-642 L K )
J0560
J0670
J0690
K1890
K1920
K1930
K1950
K1960
K1970
K1980
K1990
K 2000
K201 0
t
Description
Soft Damp Ass'y (C)
80700
80710
L
Part No.
Description
A0230
80680
o1930
021 30
a2250
s0360
u0340
u0600
u1100
u1120
u1190
u1230
u1250
u 1330
F
R
v 4170
v4190
v 4250
v 4520
x1990
lywheel (L )
/P Head
x5350
x5550
x5560
Erase Head
cassette Button
Sh ield Wire (Double-280)
Sh ield Wi re ( Double-22O1,
Sh ield Wire (Singte-280)
Cord Hook
x 5590
x5640
x5700
x5720
x5730
Motor
lywheel Metal ( I )
Co rd P u I ley Ass'y (A
Rew ldle (C)
Chassis Ass'y
x57 40
F
x5750
)
x5760
X57BO
FF Collar (A)
Button Shaft (F)
Rec Arm Collar
R/P Head Washer
Lug Terminal (F)
Rew Lever (D)
F Lever (D)
Pause Cam (C)
F F ldler Lever (A)
Switch Arm (A)
Rew Arm (D)
F
FF Arm (D)
Stop Arm (A)
B utton S ide ( LA
)
Head Panel Pushing Plate (H)
Case Lock Arm (A)
F lywheel Support (N )
Spring Plate (R) (Holding Pack)
Motor Bracket (M)
Sensor Arm
Lock Plate
x5790
x5800
Rew ldler Arm
Eject Arm
x5810
x6100
Arm
Play Arm
x61 50
Res
TU Lever
01144
Reel Base
Head Panel Ass'y
Soft Damp Plate
Eject Cord (E)
R/P Head Spring (B)
Rew Reel Spring (B)
01 146
Pan Head Screw M2.6 x 3
Pan Head Screw M2.6 x 5
Flat Head Screw M2.6 x 4
Flat Head Screw M3 x 5
Pan Head Screw M2 x 6 (Bind)
Pan Head Tapping Screw
Pause
Pinch Roller Spring
o4145
04166
OBOBT
17166
Arm (D)
M3x5
(G
301 26
301 30
Pan Head Screw M2 x 5
W/Spring Washer
Pan Head Screw M2.6 x 4
W/Spring Washer
Pan Head Screw M2.6 x 5
W/Spring Washer
Pan Head Screw M2.6 x 10
W/Spring Washer
Pan Head Screw M3 x 5
W/Spring Washer
Pan Head Screw M2.6 x 7
W lF lat Washer
Pan Head Screw M2 x 4
W lF lat Washer
Spring Washer M2.6
F lat Washer M2.6
F lat Washer M3
32003
Po
32004
32202
Poly. Slide Washer
Poly. Slide Washer
Poly. Slide Washer
Poly. Slide Washer
E Rins @1.5
E R ing @2.5
1
9086
TU Lever Spring (A)
1
9145
Rec Sensor Spring ( F )
Rec Arm Spring (A)
19146
)
Rew Arm Spring (C)
Play Arm Spiing (A)
Stop Arm Spring (A)
19151
Arm Spring (C)
FF Arm Spring (B)
Pick Up Lever Spring (E)
Eject Lever Spring (N)
Rew Lever Spring (C)
Pause Cam Spring (E)
Switch Arm Spring (A)
FF Lever Spring (C)
Case Lock Arm Spring (A)
19166
Pause
Head Panel Spring (G )
Eject Cord Spring (D)
Eject Arm Spring (A)
Leaf Switch
R ubber C ush ion
Polyacetall Screw
Rec Sensor (l )
Cassette Guide (G)
Sensor
Soft Ajast Plate
20148
21005
27026
32252
3
32602
1
3601 5
36025
36040
36050
1
2
Counter Belt
Cord Pulley (C)
D rive Be lt
ly.
S
I
ide Washer Q2 x 0.25t
3621 5
E R ing O4.C
E Rins @5.0
E R ins 01 .5 ( Black
42025
Steel Ball
NOTES: 1. Part orders rnust contain Model Number, Part Number and Description.
2. Ordering quantity of screws andlor resistors must be multiple of 10 pcs.
- 13-
06.0
Q2 x
02.5
06.0
)
x 1 .0t
O.25
x O.25
x O.25
PARTS LIST
Part No.
INTEGRATED CIRCUITS
pA7300PC
2SC1327 (S,T)
or 2SC693 (G)
R
&
O'ty
Part No.
a set
1c701
Tra nsistor
014,601 ,602
,702
)
F
B2O85A
10
702
01 01
1
Transistor
0651 ,652
4
ilter Block
FUSE
&
F701
Fuse (0.31 5A)
Fuse (0.5A)
UH.OOl
s-N 5053
Fuse Holder
Fuse Holder
705,706
Transistor
Transistor
05,6,103
3
07,8
2
FUl01 ,102
FU103,104,
Transistor
o9
1
FUl04
FUl01-103,
K
L-258T-6
V U Meter
2
RESISTORS
1l4W 3.3Ko
1W 10s}
1l2W (J) 1Ko
IS188FM
or 20A90E
Germanium Diode
D1
,2,5,6
4
GP.O8B
Silicon Diode
D1
01-104
4
Zener Diode
LED
Silicon Diode
Dl06
or 1 0E1
wz-210
G L.gPR 2
s1 555
Metal
Metal
F
il m
F il
m
Carbon
1
1OTW 22pF
1 OTW 47pF
1 OTW 47OpF
LD7O1
1
16TW 1 OpF
D3,4
2
Carbon Trimmer
Carbon Trimmer
Carbon Trimmer
2oKslB, 80
16TW 47OpF
25TW 1pF
sv R701 ,702
SV R3,4
Electrolytic
Electrolytic
Electrolytic
Electrolytic
sv R 705, 706
Ca
SVR2
1
1ooKslB, 80
Carbon Trimmer
sv R 707 ,708
3
EWK.HWA332 A24
EWK-G4A332703
Potentiometer
Potentiometer
VR2O1
COILS
rbon Tr i m mer
&
vR202
4.7mH
84003
0504-012
NPT 0715
1
L751
L1
,2
L703,704
726,663, 664
25TW 4.7 pF
Electrolytic
c1 ,2,5,6,7,8
9, 1 0, 13,1 4
Electrolytic
Electrolytic
Electrolytic
47OpF
Electrolytic (130)
cl
11
1
47pF
Electrolytic
c767
1
22OpF
47OpF
Electrolytic (1 30)
Electrolytic (160)
cl07
cl08
1
1 000pF
0.33pF
Electrolytic
Aluminum
cl06
O.22pF
Alu minum
1
25TW
25TW
25TW
25TW
35TW
35TW
35TW
35TW
50TW
50TW
1
SOTW 0.1pF
1
2
2
1
Power Transformer
1
SWITCHES
sw-1 501037
ESB-70294
ESD-81 559
5 Key Push SW
Power Switch
Slide Switch
CONNECTORS
H LJO307-O1-O20
H LJ0337 -01-030
&
s801
cs72&.1-2
Termina! Pin
8 Hole DIN Socket
N41 572
DIN RCA4P Socket
Micro Connector
Ass'y,S-Pin
Micro Connector
Ass'y,6-Pin
Micro Connector
Ass'y,6-Pin
Micro Connector
RCA Pair Cord
Line Cord
OpF
1
00pF
3SJYF473Z
H E 1 3SJYF473Z
HE1
1
1
E4OSJSL56OK
HE4OSJYB 101 K
HESOSJSL1 Ol K
H E4OSJY B 1 51 K
H FTOSJSL2Ol K
H
1
15
1
1
1
50V O.OO22pF (K)
50V 0.0033pF (M)
50V 0.033pF (M)
50V 0.01SpF (J)
50V 0.033pF (J)
1
1
1
sOV 0.001pF (K)
50V 0.0047pF (K)
50V 0.0a7pF (K)
50V 0.o68pF (K)
50V 0.033pF (J)
1
or ECQ-PI333F2
1
,7-Pin
Micro Plug,S-Pin
Micro Plug,6-Pin
M icro Pl ug, 7-Pin
Cord Bush
1
47 trF
50TW O.47 pF
ECN-C4A103M
TERMINALS
Headphone Jack
Mic Jack
Termina! Block
Ass'y
1
1
2
(1
80)
Aluminum
Aluminum
oir
Cera m ic
Cera m ic
Cera mic
c733,734
c743,744
1
c764,766
4
01-104
c3,4
Mylar
cl9A,20A
Mylar
Mylar
1
cl
c731 ,732
c1 1 ,12
c801 ,802
c603,604
c705,706
c771,772
Mylar
Mylar
1
2
2
2
2
2
2
2
2
Ceramic
Ceramic
Cera mic
Ceramic
c761 ,762
c709,710
c723,724
c1 9,20
c727,728
2
2
2
2
2
2
2
2
2
2
2
Mylar
Mylar
c749,750
c21 ,22,25,26
4
Mylar
Mylar
c23,24
c27,28
c713,714
2
2
2
c721 ,722
2
Mylar
or Polypropylene
2
50V O.Oo47 pF (J)
Mylar
1
or ECO-PI472F2
or Polypropylene
-14-
22
15,16,17,18
601,602,605
606,735,736
745,746
c669
c729,730
c607,763
1
,l
OSC Block
1
10
667,668
TRANSFORMERS
lnductor
lnductor
Bias Trap Coil
1.SmH
PC-002
10
c707,708
715,716,725
1
ACC-o10
c701 ,702
cl09
Electrolytic
Electrolytic
2
2
2
50KoB, 80
SR.3P4
2
2
2
1
747,748
1Ks}8, 80
171825-5
171825-6
171825-7
c71 1 ,712
c29, 1 10
c7 1 g, 720
1
718,741 ,742
2Kr,8, 80
MC07-050
2
703,7M,717
CONTROLS
MC06-0s2
R715,716
R102
R 776
CAPACITORS
or MA15O
or D*42
MC06-051
1
I
801
DIODES
07
2
3
METERS
or
or 2SC945 (K)
M B05-1
2
801
F
2SC536 (H)
323H DS
RP-001
,702
FUSE HOLDERS
U-5231 1 5T
F U-52501 5T
F
Transistor
F
or 2SC838 (T)
!
O'ty
a set
FI LTERS
2
or 2SC536AUD (F)
2SC1684 (T)
Symbol No.
Description
TRANSISTORS
rc
653,6il,701
or 2SC 1571 (G )
25D61 2 (K)
or 2SC2209 (R,S)
2SC536AUD (F)
or 2SC16U (O, R)
2SD592NC (R, S)
2SC16g5 (O,
Symbol No.
Description
Part No.
Description
Symbol No.
O'ty
a set
Part No.
Front Panel
20597-2
N41756-GY-T
Rear Panel
Side Cap
Push Button
6
N41 660
N41 661
Knob 44
1
Knob
1
N20575-S
Case
No.7102
Foot
N42052-SS
1
N41538.SSR
1
N30204A
N41841-DB
N41 380
N40271
N42034-DB
2
21
1
N41 109
Cass'Mechanism
Cass'Holder
Holder Rear Base
Cass'Window
Counter Window
N407694
Sheet
N20315
N3021 5
N41110
for
1
1
-1 3.
1
N40487
N20577
N42121
1
N42122
1
1
N42156
N 20574
1
N41 471
1
Cass'Holder
N41538-SS
Cass' Key Cap
6
Cass'Display Plate
Decoration Screw
2
oM-237
1
1
Cass'Mirror
1
Cass'Plate
1
&
MISC.
Bag, For Unit
Bag, For lnst. Book
N41 31 8
See page
Cass'Key Cap (Red)
Cass'Button
PACKING MATERIAL
4
CASSETTE PARTS
cr-3709B (C)
O'ty
a set
CASSETTE PARTS
APPEARANCE PARTS
Nl0153
N
Symbol No.
Descript ion
A
1
Pad, Land R
lnner Carton
Outer Carton
2
Pad
2
1
Bottom Chassis
1
Heat Sin k
1
lnstruction Book
1
5
NOTE: 1. Part orders must contain Model Number, Part Number and Description.
2, Ordering quantity of screwsand/or resistors must be multiple of 10 pcs.
3. Resistorsnotdetailedinpartslistareall carbontypel/4rmtt,withregardtothevalue,refertotheschematicdiagram.
-15-
1