Expert FD-760 User manual

SERVICE MANUAL
GxpGrl
FD-760
Stereo Cassette Deck
SPECIFICATIONS
Track System 4-track 2-channel, stereo recording lnput Sensitivity/lmpedance
andplayback MlC.. ...0.3mY/4.7kohms
Tape Speed . 1-718 i.p.s. (4.75 cm/sec.) LINE . . . 40 mV/8.2 kohms
WowandFlutter ... O.\Yo(WRMS) DlN.. ...0.5mV/3.3kohms
Frequency Output Level (at Dolby level)
Response ...50-17,000H2(Metaltape) LINE. ...400mV
50 - 16,000 Hz (CrOu, tape) DIN . . . . 800 mV
50 - 14,000 Hz (Normal tape)
(Dolby NR off)
Sisnal-to-Noise GENERAL
Ratio . . . . . 53 dB (Dolby NR off, CrO2 or Power
Metal tape, CCIR/ARM weighted Consumption 15 watts
400 Hz) Power Supply . . . . . AC 22OY SOl0OHz
The S/N is improved by 9 dB with Dimensions .. 442lWl x297 lDl x 133(H) mm
DolbyNRon. Weight(Net) ......5kg(l1lbs.)
Total Harmonic Accessory . . Shielded Audio Cables (2) .
Distortion ... 1.8Yo(at1 kHz.0VU)
Erase Ratio . 65 dB (at 1 kHz,OVU + 10 dB) Specifications and design are subject to change without
Fast Forward and notice.
RewindTime . . . . . . 90second (C-60tape)

FRONT VIEW
REAR VIEW
V U meter
KL-258T-6 Cassette Holder
N 2031 5Knob 44
N41660
Cassette Key Cap (x S ) Knob 21
N41 53&SS N41661
Push Button (x 6)
N42052-SS Cassette Key Cap
N4153&SSR
rr-r ra,rrrt
a /ar
Lart
o
arDat
Foot Bottorn
No.7102 N20574
-2-

PLAY AMP
ALIGNMENT PROCEDURE
Set the position of Rec. Volume to Max.,
1) Head Azimuth
RIP HEAD PLAY I
(For Alignment points see page 5.)
and of Bal. Volume, Bias Adj. to Center in allalignment.
OUTPUT
DOLBY AMP AMP LIN E OUT
U
\- 2l vu Meter LrN E rN DO LBY AMP OUTPUT
METER AMP
+2dB (DOLBY LEVEL)
CONF IRMED OUTPUT
VO LTAG E
100mV
QVM
VU METER
400H2
PLAY AMP
TP705, 706
DO LBY AMP
TP705 ,706
ADJ
V.M = 100mV
OUTPUT
METER AMP
\-
\- RIP H EAD
3) PIay Back Level
+2dB
ADJ.
Controls to be positioned Test Tape P roced u re
Dolby NR : OFF
MPX : OFF
Tape Selecto r . NO R MA L
Function : PLAY
MTT.114 1 ) Adjust the head mounting screw in order to
obtain max. V.M. indication.
VU METER
Contro ls to be positioned Test Tape P roced u re
Dolby NR : OFF
MPX : OFF
Tape Selecto r . NO R MA L
Function : REC.
BIank
Normal 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.
Controls to be positioned Test Tape P roced u re
Dolby NR : OFF
MPX : OFF
Tape Selector : NO R MA L
Function : PLAY
MTT.150 Ad 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)
-3-

ALIGNMENT PROCEDURE
4l Bias Trap / Bias Voltage A ,^ , ,,
TP7071708
B IAS-OSC APPROX. 60KHz
OSC
TP705 /706
R ECOR D EO AMP
NOTE: The Bias Voltages indicated in the above table do not necessarily correspond to the best recording character-
istics 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
RIP
LINE IN
400H2
H EAD
ADJUSTMENT (A) (BIAS TRAP)
Controls to be positioned Test Tape P roced u re
Dolby NR : OFF
MPX : OFF
Tape Selector . METAL
Function : R EC.
Blank Ad justing L703 , 704 to m in. ind ication on the
V.M. scale at the Test point of TP7 07 and 708.
(GND: TP709)
ADJUSTMENT (B) (BIAS VOLTAGE)
Dolby NR : OFF
MPX : OFF
Tape Selector : METAL
J
EXTRA
J
NOR MAL
Blank
Metal
X L-II
B H F-60
1) Connect V.M. across TP7011703 and TP7021704.
Step ITa pe Se lecto rAppro x.
Voltage Adjust
1 [ MErAL T ao mv SV R 707 ,7OB
2 | rxrRA(croz) | b5mV SVR2
3 [ NoRMAL | _1x ly_ _SVR 1
Controls to be positioned Test Tape P roced u re
Dolby NR : OFF
MPX :OFF
Tape Selector . NORMAL
1 ) 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.
4l 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.
-4-

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703
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704
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R 745
EC/PLAY LEVE L
SV R 701
(L)
,,^. R 756
v
P TP708
TP
PLAY BACK LEVEL
DCA.196
ALIGNMENT POINTS
BIAS (METAL)
,D'II,'O'
co-21 1A
METER
SVR 1 (NORMAL)
(CrOz )
B IAS
-5-

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CASSETTE AMp WTH DOLBY NR BOARD (DCA-196)
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powER suppLy, EQ & AMp BoARD (pEA-286)
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DIN AMP BOARD (DRA-lgO)
7O MIC AMP
PcB(MlA-t9l)
TO POWER SUPLLY,
EO & AMP PCB
(PEA -286)
TO POWER SUPPLY I
EE } AMP PCB
(pen-2s6 )
BIAS OSC BOARD (CO-211A)
TO CASSETTE AMP WITH
DoLBY NR PCB(Dcr-t96)
a.
ll
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MIC AMP BOARD (MIA-191)
TO VOLUME CONTR OL
PCB(VR- 193)
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TO PoWER SUPPLY, E0
f Al,lP Pc B ( PEA-286)
TO
ERASE HEAD
TO DIN AMP
PCB(DRA-I90) TO C ASS E TTE AM P HTH
DOLBY NR PCB(DRA. I96 )
-8-

CIRCUIT DIAGRAM
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EXPLODED DIAGRAM
CASSETTE MECHANISM (CT.37O9B)
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-11-

PARTS LIST
CASSETTE MECHANISM (CT-37098}
Part No. Description
Soft Damp Ass'y (C)
Pinch Roller Ass'y
T U ld le r Ass'y
F F t'd ler Ass'y
Supply Reel Ass'y
Take Up Reel Ass'y
Counter
F lywheel (L )
R /P Head
Erase Head
cassette Button
Sh ield Wire (Double-280)
Sh ield Wi re ( Double-22O1,
Sh ield Wire (Singte-280)
Cord Hook
Motor
F lywheel Metal ( I )
Co rd P u I ley Ass'y (A )
Rew ldle (C)
Chassis Ass'y
Sensor Arm
Lock Plate
Rew ldler Arm
Eject Arm
Pause Arm
Play Arm
TU Lever
Reel Base
Head Panel Ass'y
Soft Damp Plate
Eject Cord (E)
R/P Head Spring (B)
Rew Reel Spring (B)
Pinch Roller Spring (G )
TU Lever Spring (A)
Rec Sensor Spring ( F )
Rec Arm Spring (A)
Rew Arm Spring (C)
Play Arm Spiing (A)
Stop Arm Spring (A)
Pause 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)
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
Counter Belt
Cord Pulley (C)
D rive Be lt
Description
L
A0230
80680
B0690
80700
80710
8O720
c0330
F0120
G 0230
G 0320
G1240
G1290
G1300
G 1310
G1320
(M P-390 -3231
( H2331 -01 1 0)
(H53203-05)
c 1 330 (MM r-642 L K )
J0560
J0670
J0690
K1890
K1920
K1930
K1950
K1960
K1970
K1980
K1990
K 2000
K201 0
K2070
N0240
ao240
o0870
o1740
o1760
o1780
o1790
o1800
o1810
o1820
o1830
o1840
o1850
o1870
o1880
o1890
o1900
01910
o1920
o1930
021 30
a2250
s0360
u0340
u0600
u1100
u1120
u1190
u1230
u1250
u 1330
v291 0
v3870
v4140
v 4170
v4190
v 4250
v 4520
x1990
x5350
x5550
x5560
x 5590
x5640
x5700
x5720
x5730
x57 40
x5750
x5760
X57BO
x5790
x5800
x5810
x6100
x61 50
01144
01 146
o4145
04166
OBOBT
17166
1 9086
1 9145
19146
19151
19166
20148
21005
27026
301 26
301 30
32003
32004
32202
32252
32602
3601 5
36025
36040
36050
3621 5
42025
U
t
r,
3
1
1
2
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.
Part No.
Spring Tube
Sensor Arm Spacer
Case Lock Arm Collar (B)
Motor Pu I ley
FF Collar (A)
Button Shaft (F)
Rec Arm Collar
R/P Head Washer
Lug Terminal (F)
Rew Lever (D)
F F Lever (D)
Pause Cam (C)
F F ldler Lever (A)
Switch Arm (A)
Rew Arm (D)
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)
Soft Ajast Plate
Res Arm (D)
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
M3x5
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
Po ly. S I ide Washer Q2 x 0.25t
Poly. Slide Washer 06.0 x 1 .0t
Poly. Slide Washer Q2 x O.25
Poly. Slide Washer 02.5 x O.25
Poly. Slide Washer 06.0 x O.25
E Rins @1.5
E R ing @2.5
E R ing O4.C
E Rins @5.0
E R ins 01 .5 ( Black )
Steel Ball
- 13-

PARTS LIST
Part No. Description Symbol No. O'ty
a set
INTEGRATED CIRCUITS & TRANSISTORS
pA7300PC
2SC1327 (S,T)
or 2SC693 (G)
or 2SC 1571 (G )
25D61 2 (K)
or 2SC2209 (R,S)
2SC536AUD (F)
or 2SC16U (O, R)
2SD592NC (R, S)
2SC16g5 (O, R )
or 2SC536AUD (F)
2SC1684 (T)
or 2SC838 (T)
or 2SC536 (H)
or 2SC945 (K)
rc
Tra nsistor
Transistor
Transistor
Transistor
Transistor
Transistor
1c701 ,702
014,601 ,602
653,6il,701
702
01 01
0651 ,652
705,706
05,6,103
07,8
o9
2
10
1
4
3
2
1
DIODES
IS188FM
or 20A90E
GP.O8B
or 1 0E1
wz-210
G L.gPR 2
! s1 555
or MA15O
or D*42
Germanium Diode
Silicon Diode
Zener Diode
LED
Silicon Diode
D1 ,2,5,6
D 1 01-104
Dl06
LD7O1
D3,4
4
4
1
1
2
CONTROLS
1Ks}8, 80
2Kr,8, 80
2oKslB, 80
50KoB, 80
1ooKslB, 80
EWK.HWA332 A24
EWK-G4A332703
Carbon Trimmer
Carbon Trimmer
Carbon Trimmer
Ca rbon Tr i m mer
Carbon Trimmer
Potentiometer
Potentiometer
sv R701 ,702
SV R3,4
sv R 705, 706
SVR2
sv R 707 ,708
1
VR2O1
vR202
2
2
2
1
3
1
,l
COILS & TRANSFORMERS
1.SmH
4.7mH
1 84003
0504-012
NPT 0715
lnductor
lnductor
Bias Trap Coil
OSC Block
Power Transformer
L751
L1 ,2
L703,704
1
2
2
1
1
SWITCHES
sw-1 501037
ESB-70294
ESD-81 559
5 Key Push SW
Power Switch
Slide Switch s801 1
1
1
CONNECTORS & TERMINALS
H LJO307-O1-O20
H LJ0337 -01-030
323H DS
RP-001
cs72&.1-2
N41 572
M B05-1 07
MC06-051
MC06-0s2
MC07-050
171825-5
171825-6
171825-7
SR.3P4
PC-002
ACC-o10
Headphone Jack
Mic Jack
Termina! Block
Termina! Pin
8 Hole DIN Socket
DIN RCA4P Socket
Micro Connector
Ass'y,S-Pin
Micro Connector
Ass'y,6-Pin
Micro Connector
Ass'y,6-Pin
Micro Connector
Ass'y ,7-Pin
Micro Plug,S-Pin
Micro Plug,6-Pin
M icro Pl ug, 7-Pin
Cord Bush
RCA Pair Cord
Line Cord
1
1
1
15
1
1
1
1
1
1
1
2
1
1
2
1
Part No. Description Symbol No. O'ty
a set
FI LTERS
F B2O85A F ilter Block F701 ,702 2
FUSE & FUSE HOLDERS
F U-5231 1 5T
F U-52501 5T
F UH.OOl
s-N 5053
Fuse (0.31 5A)
Fuse (0.5A)
Fuse Holder
Fuse Holder
FUl01 ,102
FU103,104,
801
FUl04
FUl01-103,
801
2
3
1
I
METERS
K L-258T-6 V U Meter 2
RESISTORS
1l4W 3.3Ko
1W 10s}
1l2W (J) 1Ko
Metal F il m
Metal F il m
Carbon
R715,716
R102
R 776
2
1
1
CAPACITORS
1OTW 22pF
1 OTW 47pF
1 OTW 47OpF
16TW 1 OpF
16TW 47OpF
25TW 1pF
25TW 4.7 pF
25TW 1 OpF
25TW 47 trF
25TW 1 00pF
25TW 47OpF
35TW 47pF
35TW 22OpF
35TW 47OpF
35TW 1 000pF
50TW 0.33pF
50TW O.22pF
SOTW 0.1pF
50TW O.47 pF
ECN-C4A103M
HE1 3SJYF473Z
H E 1 3SJYF473Z
H E4OSJSL56OK
HE4OSJYB 101 K
HESOSJSL1 Ol K
H E4OSJY B 1 51 K
H FTOSJSL2Ol K
50V O.OO22pF (K)
50V 0.0033pF (M)
50V 0.033pF (M)
50V 0.01SpF (J)
50V 0.033pF (J)
sOV 0.001pF (K)
50V 0.0047pF (K)
50V 0.0a7pF (K)
50V 0.o68pF (K)
50V 0.033pF (J)
or ECQ-PI333F2
50V O.Oo47 pF (J)
or ECO-PI472F2
Electrolytic
Electrolytic
Electrolytic
Electrolytic
Electrolytic
Electrolytic
Electrolytic
Electrolytic
Electrolytic
Electrolytic
Electrolytic (130)
Electrolytic
Electrolytic (1 30)
Electrolytic (160)
Electrolytic ( 1 80)
Aluminum
Alu minum
Aluminum
Aluminum
oir
Cera m ic
Cera m ic
Cera mic
Ceramic
Ceramic
Cera mic
Ceramic
Mylar
Mylar
Mylar
Mylar
Mylar
Mylar
Mylar
Mylar
Mylar
Mylar
or Polypropylene
Mylar
or Polypropylene
c71 1 ,712
c29, 1 10
c7 1 g, 720
c701 ,702
703,7M,717
718,741 ,742
747,748
cl09
c707,708
715,716,725
726,663, 664
667,668
c1 ,2,5,6,7,8
9, 1 0, 13,1 4
15,16,17,18
601,602,605
606,735,736
745,746
c669
c729,730
c607,763
cl 11
c767
cl07
cl08
cl06
c733,734
c743,744
c731 ,732
c1 1 ,12
c801 ,802
c764,766
cl 01-104
c3,4
c603,604
c705,706
c771,772
c761 ,762
cl9A,20A
c709,710
c723,724
c1 9,20
c727,728
c749,750
c21 ,22,25,26
c23,24
c27,28
c713,714
c721 ,722
2
2
2
10
1
10
22
1
2
2
1
1
1
1
1
2
2
2
2
2
2
4
2
2
2
2
2
2
2
2
2
2
2
4
2
2
2
2
-14-

Part No. Description Symbol No. O'ty
a set
APPEARANCE PARTS
Nl0153
N 20597-2
N41756-GY-T
N42052-SS
N41 660
N41 661
N20575-S
No.7102
Front Panel
Rear Panel
Side Cap
Push Button
Knob 44
Knob 21
Case
Foot
1
1
2
6
1
1
1
4
CASSETTE PARTS
cr-3709B (C)
N20315
N3021 5
N41110
N41 109
N407694
N41538-SS
Cass'Mechanism
Cass'Holder
Holder Rear Base
Cass'Window
Counter Window
Sheet for
Cass'Holder
Cass' Key Cap
See page 1 1 -1 3. 1
1
1
1
1
1
5
Part No. Descript ion Symbol No. O'ty
a set
CASSETTE PARTS
N41538.SSR
N30204A
N41841-DB
N41 380
N40271
N42034-DB
Cass'Key Cap (Red)
Cass'Button
Cass'Display Plate
Decoration Screw
Cass'Mirror
Cass'Plate
1
6
1
2
1
1
PACKING MATERIAL & MISC.
N41 31 8
N40487
N20577
N42121
N42122
N42156
N 20574
N41 471 A
oM-237
Bag, For Unit
Bag, For lnst. Book
Pad, Land R
lnner Carton
Outer Carton
Pad
Bottom Chassis
Heat Sin k
lnstruction Book
1
1
2
1
2
1
1
1
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-