WM-GX680/GX688 - Diagramas dediagramas.diagramasde.com/audio/WM-GX680 GX688 sm.pdf · WM-GX680/GX688 US Model AEP Model WM-GX680 E Model Tourist Model WM-GX688 Chinese Model WM-GX680/GX688
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Manufactured under license from Dolby LaboratoriesLicensing Corporation.“DOLBY” and the double-D symbol a are trademarksof Dolby Laboratories Licensing Corporation.
Design and specifications are subject tochange without notice.
Photo: WM-GX688
— 2 —
Notes on chip component replacement• Never reuse a disconnected chip component.• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing• Keep the temperature of soldering iron around 270˚C
during repairing.• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).• Be careful not to apply force on the conductor when soldering
or unsoldering.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITHMARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTSLIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESECOMPONENTS WITH SONY PARTS WHOSE PART NUMBERSAPPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTSPUBLISHED BY SONY.
TABLE OF CONTENTS
1. SERVICE NOTE ······························································· 3
2. GENERAL ·········································································· 5
3. DISASSEMBLY3-1. Case assy ········································································· 63-2. Belt ·················································································· 73-3. Lid block assy, cassette ··················································· 73-4. Ornament, reel ································································ 83-5. Main Board ····································································· 83-6. Motor (M601) ································································· 93-7. Holder (F) Assy ······························································· 93-8. Lever (N)/(R) Assy, pinch ············································· 103-9. Head, magnetic (HP901) ··············································· 10
8. ELECTRICAL PARTS LIST ······································· 33
— 3 —
SECTION 1SERVICE NOTE
[Service Mode]The service mode enables to operate the mechanism of WM-GX680/688 while the MAIN board is opened.Rotation of the idler gear (A) (S side) is detected using the photo-reflector (PH1) in the WM-GX680/688. PH1 is located on the MAINboard, therefore the rotation of the idler gear (A) (S side) cannot bedetected by PH1 when the MAIN board is removed. As a result, themotor cannot be controlled and cannot run correctly.To repair the machine after the MAIN board is removed while themain power is turned on, follow the procedures as described below.
1. Setting1) Remove the cabinets referring to section “3. DISASSEMBLY”.
Open the MAIN board.2) Connect the motor (M601) and the plunger solenoid (PM901)
to the MAIN board using the jumper wires. When the extensionjig (1-769-143-11) (10 wires as a set) is used, they can beconnected easily.
3) Short the TAPE DETECT switch (S901-2), R TUME switch(S901-1), F TUME switch (S902-1) and ATS switch (S902-2).
4) Connect an AF oscillator to resistor (R43).5) Connect DC 1.3 V from external regulated power supply to ‘
and ’ terminals of the battery.
2. PRE-SET statusThe PLAY, FF and REW modes can be entered only from the PRE-SET status.1) Check that the slider (NR) is in the center position (S1), and
the FWD/REV switch is also in the center position. Whenthese switches are not in the center position, set them to thePRE-SET status as follows.
2) Move the FWD/REV switch (S1) to the same position as theslider (NR) is set.
3) The slider (NR) can be moved when the main power of theregulated power supply is turned OFF once then back ON.Move the FWD/REV switch (S1) to the center position insynchronism with the timing when the slider (NR) is moved.
3. FF, REW modes1) Check that the PRE-SET status is set.2) Connect square wave or sine wave to resistor (R43). (See
illustration below.)3) Press the p switch (S3) to enter the STOP mode.4) Press the FF PRESET+ switch (S4) and the REW PRESET–
switch (S5).
4. PLAY mode1) Check that the PRE-SET status is set.2) Connect square wave or sine wave to resistor (R43). (See
illustration below.)3) Press the p switch (S3) to enter the STOP mode.4) When the 9(REPEAT switch (S9) of the MAIN board is
pressed, the slider (NR) moves once to the F side then movesto the R side. When the FWD/REV switch (S1) is pressed inthe synchronism with the above timing, the machine can enterthe PLAY (R side) mode. Press the 9(REPEAT switch(S9) again, and move the FWD/REV switch (S1) in thesynchronism with the motion of slider (NR). It enables themachine to enter into the PLAY (F side) mode.
Note 1: When you fail to enter the PLAY mode, re-start from step1) PRE-SET status.
Note 2: Regarding the 9(REPEAT (S9), p (S3),FF PRESET+ (S4), and REW PRESET– (S5) switches,use these switches of the remote control unit as much aspossible.
Note 3: If a headphones are used, the beep sound shows the timingof the FWD/REV switch (S1).
– MAIN BOARD (SIDE B) —
p(S3)
ENTER(S10)
REC(S11)
BAND(S8)
MENU(S6)
R43(SIDE A)
Q15(SIDE A)
SET(S7)
(S1)FWD←STOP→REV
Battery terminal ’Battery terminal ‘
Square wave(sine wave)
10 Hz, -3.5 dB
AF OSCPlunger (PM901)
Short
Short
TAPE DETECTSWITCH(S901-2)
R TUMESWITCH(S901-1)
FF PRESET +(S4)
REW PRESET –(S5)
œREPEAT(S9)
F TUMESWITCH(S902-1)
ATSSWITCH(S902-2)
M601M
— 4 —
[ Slider (NR) ] [ Tape drive mechanism ]Tape drive mechanism in PLAY mode
Tape drive mechanism in FF mode Tape drive mechanism in REW mode
Slider (NR)
Center
F side R side
Insert Flywheel (N)
Pulley (Reverse)
Clutch Assy(F)
Motor Pulley
Gear (REEL)(S side)Gear(REEL)(T side)
Gear (NR)(FWD : Left side
REV : Right side)
Idler Gear(B)
Idler Gear (A)(S side)Idler Gear(A)(T side)
Insert Flywheel (R)
Cam Gear
Gear (Y)
Insert Flywheel (N)
Pulley (Reverse)
Clutch Assy(F)
Motor Pulley
Gear(REEL)(T side)
Idler Gear(A)(T side)
Insert Flywheel (R)
Cam Gear
Gear (Y)
Gear (FR)(FF : Left side)
Insert Flywheel (N)
Pulley (Reverse)
Clutch Assy(F)
Motor Pulley
Gear(REEL)(S side)
Idler Gear(A)(S side)
Insert Flywheel (R)
Cam Gear
Gear (Y)
Gear (FR)(REW : Right side)
— 5 —
SECTION 2GENERAL
• LOCATION OF CONTROLS
This section is extractedfrom instruction manual.
x
VOL
VOL
HOLD
HOLD
Y•REPEAT
FF (AMS)
REW (AMS)
Y•x
REW
Plug in firmly.iREMOTE
FF
PRESET –
RADIO OFF
SETMENU
TUNE/PRESET +
RADIO ON/BAND•OFF
PRESET +
TUNE/PRESET – RADIO ON/BAND
ENTER
SOUND MODE MODE AVLS MODE aNRPB TUNE FM PB
ENTER/COUNTER RESET
SETMENU
Tape counter
HOLDHOLD
— 6 —
SECTION 3DISASSEMBLY
Note : Disassemble the unit in the order as shown below.
Note : Follow the disassembly procedure in the numerical order given.
3-1. CASE ASSY
3 Screw (M1.4 × 2.0)
2 Two screws (M1.4 × 2.0)
1 Lid, Battery
5 Remove the case assy in the direction of the arrow.
4 Two screws (M1.4 × 2.5)
knob (HOLD-B)
Claw
S11
S501
S2
Note: When assembling thecase assy, align theknob (HOLD-B) with theposition of S2.
knob (ISS)
Note: When assembling thecase assy, align theknob (ISS) with theposition of S501.
knob (REC)
Note: When assembling thecase assy, align theknob (REC) with theposition of S11.
Set Case assy
Belt
Lid block assy, cassette Main boardOrnament, reel
Motor(M601)
Holder (F)assy
Lever (N)/(R) assy,pinch
Head, magnetic (HP901)
— 7 —
3-2. BELT
3-3. LID BLOCK ASSY, CASSETTE
3 Belt
Belt
2 Terminal board (Battery ’)
1 Remove solder from the battery terminal board.
Belt threading
5 Lid block assy, cassette
4 Shaft
3 Open the cassette lid
1 Screw (M1.4 × 2.0)
2 Two screws (M1.4 × 2.0)
— 8 —
3-4. ORNAMENT, REEL
3-5. MAIN BOARD
1 Ornament, reelRemove the assembly while removingthe three claws and boss carefully.
Note:
Claw
Claw
SLIDER
8 Remove soldering (two points) from plunger solenoid.
6 Screw (B1.7 × 3) tapping
5 Screw (B1.7 × 3) tapping
3 Screw (1.4 × 1.6)
2 Screw (M1.4)
7 Screw (M1.4) Toothed lock
1 Ats flexible board
4 Screw (M1.4)
9 Remove soldering (four points) from motor.
When assembling the MAIN board, align the slider with the position of S1.
Note:
S1
— 9 —
3-6. MOTOR (M601)
1 Two screws (M1.4) Toothed lock
2 Motor (M601)
3-7. HOLDER (F) ASSY
4 Screw (M1.4)
2 Shaft
6 Shaft
1 Two screws (M1.4 × 1.6)
3 Lever (B), lock
9 Remove the holder (F) assy in the direction of the arrow.
5 Lever (S), lock
8 Flexible board
7 Bracket (cassette) assy
— 10 —
3-8. LEVER (N) / (R) ASSY, PINCH
3-9. HEAD, MAGNETIC (HP901)
Claw
ClawNote: Be careful of the claw
1 Remove the lever (R) assy, pinch in the direction of the arrow.
2 Remove the lever (N) assy, pinch in the direction of the arrow.
Note: Be careful of the claw
1 Two screws (M1.4 × 7.2)
2 Remove the head, magnetic (HP901) in the direction of the arrow.
— 11 —
SECTION 4MECHANICAL ADJUSTMENT
SECTION 5ELECTRICAL ADJUSTMENT
PRECAUTION1. Specified voltage : 1.3 V (DC)2. Switch and control position
MENU switchHOLD : OFFVOL : MAXISS : 1
TAPE SECTION
Tape Speed AdjustmentProcedure:
1. Enter the FWD playback mode.2. Adjust RV601 so that the value of the frequency counter reading
becomes 3,000 Hz.Specification value:
Frequency counter2,940 Hz – 3,060 Hz
3. Check that the frequency deviation at the beginning and endingof a tape is within 1.5 % (45 Hz).
PRECAUTION1. Clean the following parts with a denatured-alcohol-moistened
swab:record/playback/erase head pinch rollerrubber belts capstan
2. Demagnetize the record/playback/erase head with a headdemagnetizer. (Do not bring a head demagnetizer close to theerase head.)
3. The adjustments should be performed with the rated powersupply voltage unless otherwise noted.
• Torque MeasurementSignal
3 kHz, 0 dB
Used forTape Speed Adjustment
TapeWS-48A
Test tapeWS-48A
(3kHz, 0dB)
Set
2 REMOTE jack (J701)
16 ΩFrequency counter
+
–
[MAIN BOARD] — SIDE B —
‘
‘
’
RV601
L2
T2
TP6
TP5IC2
13
241
12
T1
RV1
RV601 : Tape speed adjustment
RV1 : FM VCO adjustment
T2 : AM IF adjustment
L2 : FM frequency coverage adjustment
T1 : AM frequency coverage adjustment
TP1
Adjustment Parts Location :
[MAIN BOARD] — SIDE A —
Mode
FWD
FWDBack Tension
REV
REVBack Tension
FF, REW
Torque Meter
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
Meter Reading1.47 to 2.45 mN•m
(15 to 25 g•cm)(0.21 to 0.34 oz•inch)
Less than 0.20 mN•m(Less than 2.0g•cm)
(Less than 0.028 oz•inch)
1.47 to 2.45 mN•m(15 to 25 g•cm)
(0.21 to 0.34 oz•inch)
Less than 0.20 mN•m(Less than 2.0g•cm)
(Less than 0.028 oz•inch)
More than 4.90 mN•m(More than 50 g•cm)
(More than 0.69 oz•inch)
— 12 —
[AM]BAND switch : AM
[FM]BAND : FM
• Repeat the procedures in each adjustment several times.
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 531 kHz
Confirmation 1,710 kHz
FM VCO AdjustmentProcedure :
1. Connect frequency counter to the positions shown below.2. Tune the set to 98 MHz.3. Adjust RV1 so that the value of the frequency counter reading
becomes 19 kHz.
Specification Value :
Frequency counter
18,900 – 19,100 Hz
TUNER SECTION
0.01µF
FM RF signalgenerator
to ANT (TP1)
22.5kHz frequency deviation by 400Hz signal.Output level : as low as possible
Put the lead-wireantenna close tothe set.
30% amplitude modulation by 400Hzsignal.Output level : as low as possible
AM RF signalgenerator
16Ω
set+
–
level meter
2 REMOTE jack (J701)
0.01µF
FM RF signalgenerator
to ANT (TP1)
Carrier frequency : 98MHzModulation : no modulationOutput level : 0.1V (100dB)
Frequency counter
1µF+–
100kΩ
TP5(IC2 Pin !™)
TP6(IC2 Pin 9)
0dB=1µV
Adjustment Location: MAIN board (See page 11)
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2 450 kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2 76 MHz
Confirmation 108 MHz
WM-GX680/GX688SECTION 6DIAGRAMS
— 13 — — 14 — — 15 —
6-1. BLOCK DIAGRAM
• Waveform
Note on Printed Wiring Board:• Y : parts extracted from the conductor side.• b : Pattern from the side which enables seeing.
Note on Schematic Diagram:• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolyticsand tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwisespecified.
• f : internal component.• C : panel designation.• A : B+ Line.• H : adjustment for repair.• Power voltage is dc 1.5 V and fed with regulated dc power
supply from battery terminal.• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.Main board (1/3)
no mark : FM/AM, TAPE STOP( ) : FM[ ] : AM< > : TAPE PB
Main board (2/3), (3/3)no mark : REC / PB( ) : REC[ ] : PB
• Voltages are taken with a VOM (Input impedance 10 MΩ).Voltage variations may be noted due to normal produc-tion tolerances.
• Waveforms are taken with a oscilloscope.Voltage variations may be noted due to normal produc-tion tolerances.
• Circled numbers refer to waveforms.• Signal path.
E : PBa : RECF : FM
51.7kHz
1TP32 20µsec/div 5V/div
2 IC2 !¶ VCO 5µsec/div 50mV/div
3 IC801 5 PLAY BACK mode
75kHz
4 IC3 &¢ XOUT 5µsec/div 0.5V/div
5µsec/div1V/div
14
B+1.5V
16
: FM
: PB (TAPE)
: REC (TAPE)
L-CH
1 RFAMP
MIX
7VCC
OSC
6
5
8
MIX OUT
IC1FM RF/MIX
Q1,4
BUFFER
IFAMP
Q7,14
L1FM RF
D3
D2D1L2
FM OSC
FMFREQUENCYCOVERAGEQ3
LOCAL/DX
CF110.7MHz
3 IF AMP/FM DET
X110.7MHz
7
IC2IF AMP/MPX
22AF
CF2450KHz
6 IF AMP/AM DET
T2AM IF
5
4
VCCRF OUT
MIX
OSC
RF OUT
T1AM OSC
Q10RF
AMP
L5AM FERRITE-ROD
ANTENNA
LPF
Q5,6
2
24
21
20MPX
PILOT
MPX
L
15R
7
19LP2B
18LP2A
11IF REQ
16LPF1
Q11
Q9
Q13
Q12
17
RV1FM VCO
RF OUT
10IF OUT
Q18(2/2)
BUFFER
Q18(1/2)
BUFFER
MICJ501
R-CH
REV
R-CH
L-CH
FWD
FWD
REV
Q508
HP901
Q503 Q502
ISS
1
2
3
S501
RF OUT
Q514Q510
BIASOSC
Q501
Q504-507Q511,512
VREF
T501
MICREG
CONT D27
43
CONT C28
42
41
44
3
17
15
14
L
R
23MIC IN L
21RADIO IN L
20MIC IN R
18RADIO IN R
46MONITOR L
47MONITOR L
35REC MUTE
32REC/PLAY
33FWD/REV
Q515
34MIC/RADIO
IC501REC AMP
OSC
6
BIAS
REG
5
BIAS
7
VCC1
8
REG
Q509
VCC2
45
B+2.5V
B+1.5V
Q513
5
1
4
2
44
12
10
IC301(1/2)PB AMP
ANS IN
F/R SW
Q304
Q19
+2.5V VCC14
4
11
5
10
IC302DOLBY
CONTROLQ305 Q303
V REFQ302
IC3SYSTEM CONTROL
Q2
BUFFER
DOLBY VCC CTL AVLS CTL23 54
BAND AM/FM30
MONO/ST68
IF IN64
AM IN71
RV CTL 56
IMB/GRV CTL 57
AMP CTL 58
FM IN70
DO66
LOCAL/DX65
F/R CTL(PLAY)29
REC CTL53
DOLBY CTL59
F/R CTL(REC)26
RADIO/MIC25
M DATA I/O47
SW13
MUTE CTL 28
AMS IN 37
BEEP 49
PRE CTL 27
BST CTL 55
R DATA OUT 31
PW S
W
42
IC301(2/2)POWER AMP
PW IN L28
REF OUT3
BST OUT33
PW NF L29
PW IN C28
PW IN R27
PW NF R26
VOLRV301
PW OUT L20
PW OUT R22
PW OUT C21
AGC IN 35
MT
SW
41
AMS
OUT
40
BEEP
39
PRE
SW
45
BST
SW
43
VCC 19
BIAS 18
RF OUT 17
M/N
SW
46
REG
Q1352
RF OUT
IC4EEPROM
DI 3
DO 4
SK 2
CS 1M CLOCK48
CS46
XOUT74
XIN75
X275kHz
F TUME
S902ATS SWITCH
R TUME
B+1.5V
TAPE SWITCH
U
V
WMOTOR
M601CAPSTAN/REEL
U 19
W 3V 1
V REF7
IN+10
CONTROL
IC601MOTOR
START8
OSC5
DR6
S901
Q601
TAPE SPEEDADJ
RV601
Q16,17
D4
B+1.5V
PM901
PH1
PR-20
B+2.5V
Q15(1/2)
Q15(2/2)
REV
STOP
FWD
S1
HOLD
S3
ON
OFF
F/R SW 44
PHOTO CTL 38
PHOTO IN 39
HOLD SW 41
REPEATRADIOOFF
FFPRESET+
S4 S6MENU
S5 S8S7SET
S9 S11REC
S10
S2
HOLD SENS 35
BATT DET 42
KEY IN 43
IC6
REG 32 B+2.5V1
34WAKE UP 67
IC5CONP.
ND1LCD
COM1
COM4
1
4
S1
S18
5
22
DC/DCCONV.
IC801
1
25
D801
Q20
OR
Ni-Cd(NC-6WM)
1.2V
IPC 1.5V
DRY BATTERYSIZE "AA"
(IEC DESIGNATION R6)
Q804,805
DC/DCCONV.
T801Q801-803D804
D803
D802
B+2.5V
B+VD
B+1.5V
DDC2 CTL 61
DDC1 CTL 40
REMO
DATA
VCC
GND
L-CH
COM
R-CHD201
D301
D101
D302D303, 304
F1
B+1.5V
REMOTE
J701
• Signal Path
R DATA IN 34
F TUME 32
TAPE 52
R TUME 33
S 1/2 CTL 24
MOTOR CTL 50
OSC CTL 36
MOTOR DIR 51
PM CTL 60
16REW
PRESET- BANDRADIO ON/ ENTER/
COUNTERRESET
Caution:Pattern face side: Parts on the pattern face side seen from(Side A) the pattern face are indicated.Parts face side: Parts on the parts face side seen from(Side B) the parts face are indicated.
WM-GX680/GX688SECTION 6DIAGRAMS
— 13 — — 14 — — 15 —
6-1. BLOCK DIAGRAM
• Waveform
Note on Printed Wiring Board:• Y : parts extracted from the conductor side.• b : Pattern from the side which enables seeing.
Note on Schematic Diagram:• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolyticsand tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwisespecified.
• f : internal component.• C : panel designation.• A : B+ Line.• H : adjustment for repair.• Power voltage is dc 1.5 V and fed with regulated dc power
supply from battery terminal.• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.Main board (1/3)
no mark : FM/AM, TAPE STOP( ) : FM[ ] : AM< > : TAPE PB
Main board (2/3), (3/3)no mark : REC / PB( ) : REC[ ] : PB
• Voltages are taken with a VOM (Input impedance 10 MΩ).Voltage variations may be noted due to normal produc-tion tolerances.
• Waveforms are taken with a oscilloscope.Voltage variations may be noted due to normal produc-tion tolerances.
• Circled numbers refer to waveforms.• Signal path.
E : PBa : RECF : FM
51.7kHz
1TP32 20µsec/div 5V/div
2 IC2 !¶ VCO 5µsec/div 50mV/div
3 IC801 5 PLAY BACK mode
75kHz
4 IC3 &¢ XOUT 5µsec/div 0.5V/div
5µsec/div1V/div
14
B+1.5V
16
: FM
: PB (TAPE)
: REC (TAPE)
L-CH
1 RFAMP
MIX
7VCC
OSC
6
5
8
MIX OUT
IC1FM RF/MIX
Q1,4
BUFFER
IFAMP
Q7,14
L1FM RF
D3
D2D1L2
FM OSC
FMFREQUENCYCOVERAGEQ3
LOCAL/DX
CF110.7MHz
3 IF AMP/FM DET
X110.7MHz
7
IC2IF AMP/MPX
22AF
CF2450KHz
6 IF AMP/AM DET
T2AM IF
5
4
VCCRF OUT
MIX
OSC
RF OUT
T1AM OSC
Q10RF
AMP
L5AM FERRITE-ROD
ANTENNA
LPF
Q5,6
2
24
21
20MPX
PILOT
MPX
L
15R
7
19LP2B
18LP2A
11IF REQ
16LPF1
Q11
Q9
Q13
Q12
17
RV1FM VCO
RF OUT
10IF OUT
Q18(2/2)
BUFFER
Q18(1/2)
BUFFER
MICJ501
R-CH
REV
R-CH
L-CH
FWD
FWD
REV
Q508
HP901
Q503 Q502
ISS
1
2
3
S501
RF OUT
Q514Q510
BIASOSC
Q501
Q504-507Q511,512
VREF
T501
MICREG
CONT D27
43
CONT C28
42
41
44
3
17
15
14
L
R
23MIC IN L
21RADIO IN L
20MIC IN R
18RADIO IN R
46MONITOR L
47MONITOR L
35REC MUTE
32REC/PLAY
33FWD/REV
Q515
34MIC/RADIO
IC501REC AMP
OSC
6
BIAS
REG
5
BIAS
7
VCC1
8
REG
Q509
VCC2
45
B+2.5V
B+1.5V
Q513
5
1
4
2
44
12
10
IC301(1/2)PB AMP
ANS IN
F/R SW
Q304
Q19
+2.5V VCC14
4
11
5
10
IC302DOLBY
CONTROLQ305 Q303
V REFQ302
IC3SYSTEM CONTROL
Q2
BUFFER
DOLBY VCC CTL AVLS CTL23 54
BAND AM/FM30
MONO/ST68
IF IN64
AM IN71
RV CTL 56
IMB/GRV CTL 57
AMP CTL 58
FM IN70
DO66
LOCAL/DX65
F/R CTL(PLAY)29
REC CTL53
DOLBY CTL59
F/R CTL(REC)26
RADIO/MIC25
M DATA I/O47
SW13
MUTE CTL 28
AMS IN 37
BEEP 49
PRE CTL 27
BST CTL 55
R DATA OUT 31
PW S
W
42
IC301(2/2)POWER AMP
PW IN L28
REF OUT3
BST OUT33
PW NF L29
PW IN C28
PW IN R27
PW NF R26
VOLRV301
PW OUT L20
PW OUT R22
PW OUT C21
AGC IN 35
MT
SW
41
AMS
OUT
40
BEEP
39
PRE
SW
45
BST
SW
43
VCC 19
BIAS 18
RF OUT 17
M/N
SW
46
REG
Q1352
RF OUT
IC4EEPROM
DI 3
DO 4
SK 2
CS 1M CLOCK48
CS46
XOUT74
XIN75
X275kHz
F TUME
S902ATS SWITCH
R TUME
B+1.5V
TAPE SWITCH
U
V
WMOTOR
M601CAPSTAN/REEL
U 19
W 3V 1
V REF7
IN+10
CONTROL
IC601MOTOR
START8
OSC5
DR6
S901
Q601
TAPE SPEEDADJ
RV601
Q16,17
D4
B+1.5V
PM901
PH1
PR-20
B+2.5V
Q15(1/2)
Q15(2/2)
REV
STOP
FWD
S1
HOLD
S3
ON
OFF
F/R SW 44
PHOTO CTL 38
PHOTO IN 39
HOLD SW 41
REPEATRADIOOFF
FFPRESET+
S4 S6MENU
S5 S8S7SET
S9 S11REC
S10
S2
HOLD SENS 35
BATT DET 42
KEY IN 43
IC6
REG 32 B+2.5V1
34WAKE UP 67
IC5CONP.
ND1LCD
COM1
COM4
1
4
S1
S18
5
22
DC/DCCONV.
IC801
1
25
D801
Q20
OR
Ni-Cd(NC-6WM)
1.2V
IPC 1.5V
DRY BATTERYSIZE "AA"
(IEC DESIGNATION R6)
Q804,805
DC/DCCONV.
T801Q801-803D804
D803
D802
B+2.5V
B+VD
B+1.5V
DDC2 CTL 61
DDC1 CTL 40
REMO
DATA
VCC
GND
L-CH
COM
R-CHD201
D301
D101
D302D303, 304
F1
B+1.5V
REMOTE
J701
• Signal Path
R DATA IN 34
F TUME 32
TAPE 52
R TUME 33
S 1/2 CTL 24
MOTOR CTL 50
OSC CTL 36
MOTOR DIR 51
PM CTL 60
16REW
PRESET- BANDRADIO ON/ ENTER/
COUNTERRESET
Caution:Pattern face side: Parts on the pattern face side seen from(Side A) the pattern face are indicated.Parts face side: Parts on the parts face side seen from(Side B) the parts face are indicated.
WM-GX680/GX688
— 17 — — 18 —— 16 —
6-2. SCHEMATIC DIAGRAM (1/3) • See page 15 for Waveform. • See page 23 for IC Block Diagrams.
WM-GX680/GX688
— 19 — — 20 —
6-3. SCHEMATIC DIAGRAM (2/3) • See page 15 for Waveform. • See page 23 for IC Block Diagrams.
WM-GX680/GX688
— 21 — — 22 —
6-4. SCHEMATIC DIAGRAM (3/3) • See page 15 for Waveform. • See page 23 for IC Block Diagrams. • See page 29 for IC PIN FUNCTION DESCRIPTION.
IC1 8-759-362-23 IC TA7371AF-ELIC2 8-759-362-25 IC TA2022AFN-ELIC3 8-759-697-49 IC TC9327AF-612 (EXCEPT JE)IC3 8-759-697-50 IC TC9327AF-611 (JE)IC4 6-701-939-01 IC AK93C55-SG677 (JE)
IC4 6-701-943-01 IC AK93C55-SGU670 (US)IC4 6-701-944-01 IC AK93C55-SGE670 (E, HK, KR)IC4 6-701-945-01 IC AK93C55-SGEN670 (AEP, CH, EA)IC5 8-759-387-31 IC TC75S55F(TE85R)IC6 8-759-457-70 IC XC62RP1602MR
IC301 8-759-579-12 IC TA2123AF(EL)IC302 8-759-488-80 IC NJM2185AV-TE2IC501 8-759-428-23 IC LA3235WIC601 8-759-356-46 IC MM1279XVBEIC801 8-759-553-28 IC XC6383C251ML
< JACK >
J501 1-766-907-43 JACK 3P (MIC(PLUG IN POWER))J701 1-779-867-11 JACK (i / REMOTE)
3-222-163-01 POUCH, CARRYING8-953-304-90 RECEIVER MDR-E805SP SET(EXCEPT US)8-953-733-91 EAR RECEIVER MDR-W034SP SET(US)A-3052-359-A REMOTE CONTROL ASSY (GX680)A-3052-293-A REMOTE CONTROL ASSY (GX688)
MAIN
Ref. No. Part No. Description Remarks
Ver 1.1 2001. 1
WM-GX670/GX674
MEMO
WM-GX680/GX688
REVISION HISTORY
Clicking the version allows you to jump to the revised page.Also, clicking the version at the upper right on the revised page allows you to jump to the next revisedpage.
Ver. Date Description of Revision
1.0 2000.11 New
1.1 2001.01 CEV model addition
1.2 2002.01 Correction of Part No. for IC4 (SPM-01041)