Sony TC-WE675 - Dual A/r Cassette Deck User manual

Model Name Using Similar Mechanism TC-WE635
Transport Mechanism Type TCM-230ASR41B
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
STEREO CASSETTE DECK
SPECIFICATIONS
Dolby noise reduction extension manufactured under license
from Dolby Laboratories Licensing Corporation.
HX Pro originated by Bang & Olufsen.“DOLBY”, the double-D
symbol ;and “HX PRO” are trademarks of Dolby Laboratories
Licensing Corporation.
TC-WE675
— Continued on next page —
Ver 1.0 2001.04
Sony Corporation
Home Audio Company
ShinagawaTec Service Manual Production Group
9-873-894-11
2001D0900-1
© 2001. 4
SERVICE MANUAL
System
Fast-winding time
Approx.100 sec. (with Sony C-60 cassette)
Signal-to-noiseratio (at peak leveland weightedwith Dolby
NR off)
55 dB, using Sony TYPE I cassette
57 dB, using Sony TYPE II cassette
58 dB, using Sony TYPE IV cassette
S/N ratio improvement
With Dolby B NR on:
Approx. 5 dB at 1 kHz, 10 dB at 5 kHz
With Dolby C NR on:
Approx. 15 dB at 500 Hz, 20 dB at 1 kHz
Harmonic distortion
0.4% (using Sony TYPE Icassette):
160 nWb/m 315 Hz, 3rd H.D.)
1.8% (using Sony TYPE IV cassette):
250 nWb/m 315 Hz, 3rd H.D.)
Frequency response (DOLBY NR OFF)
30-16,000 Hz (±3 dB, IEC), 20-17,000 Hz
(±6 dB), using Sony TYPE I cassette
30-17,000 Hz (±3 dB, IEC), 20-18,000 Hz
(±6 dB), using Sony TYPE II cassette
30-19,000 Hz (±3 dB, IEC), 20-20,000 Hz
(±6 dB), 30-13,000 Hz (±3 dB, –4dB recording),
using Sony TYPE IV cassette
Wow and flutter
±0.13% W. Peak (IEC)
0.1% W. RMS (NAB)
±0.2% W. Peak (DIN)
Variable pitch range
Approx. –30 to +30 %
Inputs
Line inputs (phono jacks)
sensitivity 0.16 V, input impedance 47 kilohms
Outputs
Line outputs (phono jacks)
rated output level 0.5 V at a load impedance of
47 kilohms, load impedance over 10 kilohms
Headphones (stereo phone jack)
output level 0.25 mW at a load impedance of
32 ohms

2
TC-WE675
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON THE SCHEMATIC DIAGRAMS AND IN THE
PARTS LIST ARE CRITICAL TO SAFE OPERATION. RE-
PLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
ÀLA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0SUR LES
DIAGRAMMES SCHÉMATIQUES ET LALISTE DESPIÈCESSONT
CRITIQUES POUR LA SÉCURITÉDE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety checks before releasing the set to the customer:
Checktheantenna terminals,metal trim,“metallized”knobs, screws,
and all other exposed metal parts forAC leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth Ground and
from all exposed metal parts to any exposed metal part having a
returnto chassis,must not exceed0.5 mA(500 microampers).Leak-
age current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of aVOM
or battery-operated AC voltmeter. The “limit”indication is 0.75
V, so analog meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
0.15µF
To Exposed Metal
Parts on Set
1.5kΩAC
voltmeter
(0.75V)
Earth Ground
General
Power requirements
U.S.A.and Canadian models:
120 V AC, 60Hz
European models:
230 V AC, 50/60Hz
Australian models:
240 V AC, 50/60Hz
Other models:
120/220/230-240 V AC, 50/60Hz
Adjustable with voltage selector
Power consumption
22 watts
Dimensions (w/h/d)
Approx. 430 ×120 ×300 mm
Mass 4.2 kg
Supplied accessories
Audio connecting cords (2)
Control A1II cable (1)*
*Supplied for Canadian models only
Design and specifications are subject to change
without notice.

3
TC-WE675
PARTSNo. MODEL
4-232-414-0sUS model
4-232-414-1sCND model
4-232-414-2sAEP model
4-232-414-3sUK model
4-232-414-4sSP model
4-232-414-5sAUS model
MODEL IDENTIFICATION
–Back panel–
Part No.
• Abbreviation
CND : Canadian model
SP : Singapore model
AUS : Australian model
TABLE OF CONTENTS
1. GENERAL .......................................................................... 4
2. DISASSEMBLY
2-1. Case ...................................................................................... 5
2-2. Front Panel Assy ................................................................... 5
2-3. Cassette Lid Assy (Deck A/B) .............................................. 6
2-4. Mechanism Deck Assy (Deck A/B) ...................................... 6
3. SERVICE MODE .............................................................. 7
4. MECHANICAL ADJUSTMENTS................................. 8
5. ELECTRICAL ADJUSTMENTS ................................. 8
6. DIAGRAMS
6-1. Circuit Boards Location ...................................................... 12
6-2. Printed Wiring Board – MAIN Section – ........................... 14
6-3. Schematic Diagram – MAIN (1/4) Section – ..................... 15
6-4. Schematic Diagram – MAIN (2/4) Section – ..................... 16
6-5. Schematic Diagram – MAIN (3/4) Section – ..................... 17
6-6. Schematic Diagram – MAIN (4/4) Section – ..................... 18
6-7. Printed Wiring Board – DECK Section – ........................... 19
6-8. Schematic Diagram – DECK Section – .............................. 19
6-9. Schematic Diagram – LEAF SW Section – ........................ 20
6-10. Printed Wiring Board – LEAF SW Section – ................... 21
6-11. Schematic Diagram – PANEL Section –........................... 22
6-12. Printed Wiring Board – PANEL Section – ........................ 23
6-13. Schematic Diagram – POWER Section – ......................... 24
6-14. Printed Wiring Board – POWER Section – ...................... 25
6-15. IC PIN FUNCTION .......................................................... 26
7. EXPLODEDVIEWS
7-1. Case Section ........................................................................ 27
7-2. Chassis Section ................................................................... 28
7-3. Cassette Holder Section ...................................................... 29
7-4. Front Panel Section ............................................................. 30
7-5. Tape Mechanism Section .................................................... 31
8. ELECTRICAL PARTS LIST ........................................ 32

4
TC-WE675 SECTION 1
GENERAL
Front Panel
Location of Parts and Controls
1POWER button
2RESET (Deck A) button
3MEMORY (Deck A) button
4RESET (Deck B) button
5MEMORY (Deck B) button
6AUTO REC LEVEL indicator
7REC LEVEL knob
8FADER button
9ARL button
0SYNCHRO button
qa PHONES jack
qs HIGH/NOMAL button
qd A+B REC button
qf DECK B button
qg DECK A button
qh (AMS) M(Deck B) button
qj m(AMS) (Deck B) button
qk H(Deck B) button
ql h(Deck B) button
w; REC z(Deck B) button
wa A(Eject) (Deck B) button
ws REC MUTING W(Deck B) button
wd PAUSE X(Deck B) button
wf x(Deck B) button
wg DOLBY NR B/C switch
wh DOLBY NR OFF/ON FILTER
wj H/FRONT (Deck A) button
wk h/BACK (Deck A) button
wl REC z(Deck A) button
e; REC MUTING W(Deck A) button
ea A(Eject) (Deck A) button
es PAUSE X(Deck A) button
ed x/CLEAR (Deck A) button
ef (AMS) M(Deck A) button RMS +
eg m(AMS) (Deck A) button RMS –
eh DISPLAY button
ej CHECK button
ek SET button
el RMS/START button
r; PITCH CONTROL knob
ra PITCH CONTROL button
rs DIRECTION switch
• AMS is the abbreviation forAutomatic Music Sensor.
1 2 3 4 5 6 7
ra
rs
r;
wdwle;
ws w; ql qk qj qfqg qdqsqhegef wfwjwk
wa
eaed
9
0
qa
8
wges wh
ekel ejeh

5
TC-WE675
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. CASE
2-2. FRONT PANEL ASSY
1 screw
(BVTT 3x6)
2 two screws
(case 3 TP2)
3 two screws
(case 3 TP2)
4 case
qs screw
(BVTP 3x8)
qf screw
(BVTP 3x8)
qd screw
(BVTP 3x8)
qg two screws
(BVTT 3x6)
qj claw
qh claw
qk front panel assy
8 CN301
7 CN401
2 CN807
1 CN5802
3 CN803
4 CNA806
5 flat type wire
(Deck A)
9 CN002
6 flat type wire
(Deck B)
0 screw
(BVTP 3x8)
qa wire
Set Case Front Panel Assy Cassette Lid Assy (Deck A/B) Mechanism Deck Assy (Deck A/B)
• The equipment can be removed using the following procedure.

6
TC-WE675
2-3. CASSETTE LID ASSY (DECK A/B)
2-4. MECHANISM DECK ASSY (DECK A/B)
2 four claws
1 Push the EJECT button.
3 cassette lid assy
1 two screws
(BVTP 2.6x8)
3 mechanism deck assy
2 two screws
(BVTP 2.6x8)

7
TC-WE675
RESET 0
MEMORY 1
RMS/START 2
SET 3
CHECK 4
DISPLAY 5
m(AMS) 6
(AMS) M7
x/CLEAR Grid check display (*1)
n/BACK 8
N/FRONT 9
PAUSE XA
REC MUTING Wb
REC zC
DIRECTION MODE switch
gh
sPLAY
RELAY H
A deck side
Button Display
KEY CHECK & DISPLAY CHECK MODE
While pressing the h/BACK (A deck) and REC MUTING W(B deck) buttons with the power off, press the POWER button to turn on
the power.
The fluorescent display tube displays the number or special message corresponding to the button pressed.
The message displayed differs according to the position of the switch.
SECTION 3
SERVICE MODE
RESET 0
MEMORY 1
DECK A 2
DECK B 3
A+B REC 4
HIGH/NOMAL 5
m(AMS) 6
(AMS) M7
xSegment check display (*2)
h8
H9
PAUSE XA
REC MUTING Wb
REC zC
FADER d
ARL E
SYNCHRO All lit
DOLBY NR switch (*3)
OFF h
B PLAY
CH
B deck side
Button Display
Grit check display (*1)
Segment check display (*2)
RMS
(*3) The DOLBY NR switch consists of a pair of switches.
B and C are valid only in the ON or ON FILTER state.

8
TC-WE675
PRECAUTION
1. Clean the following parts with a denatured alcohol-moistened
swab :
record/playback/erase head pinch roller
rubber belts capstan
idlers
2. Demagnetize the record/playback head with a head demagne-
tizer.
3. Do not use a magnetized screwdriver for the adjustment.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power sup-
ply voltage unless otherwise noted.
Torque Measurement
SECTION 5
ELECTRICAL ADJUSTMENTS
SECTION 4
MECHANICAL ADJUSTMENTS
PRECAUTION
1. The adjustment should be performed in the publication.
(Be sure to male playback adjustment at first.)
2. The adjustments and measurement should be performed for both
L-CH and R-CH.
• Switch position
DOLBY NR switch : OFF
DIRECTION MODE switch : g
• Standard record position :
Deliver the standard input signal level to input jack and set the
REC LEVEL knob to obtain the standard output signal level
as follows.
– Record Mode–
0 dBs = 0.775V
Standard Input Level
Test Mode
1. While pressing the H/FRONT (DECK A) and REC MUT-
ING Wbuttons with the power off, press the !button to turn
on the power. The fluorescent display tube lights up for about
one second, and the test mode is set. The test mode performs the
following two special functions.
• Playback speed switching function
Pressing the HIGH/NORMAL button switches the playback
speed between standard/double speed.
• Counter RESET & MEMORY function
Resets the counter when recording starts.When rewound with
the m(AMS) buttonafterrecording, stopsat thepoint where
recording started.
2. To release the test mode, turn OFF the power switch.
Mode Torque meter Meter reading
Forward CQ-102C 30 to 65 g • cm
(0.42 to 0.90 oz • inch)
Forward
back
tension CQ-102C
DECK A : 1 to 6 g • cm
(0.014 to 0.083 oz • inch)
DECK B : 2 to 9 g • cm
(0.028 to 0.125 oz • inch)
Reverse CQ-102RC 30 to 65 g • cm
(0.42 to 0.90 oz • inch)
Reverse
back
tension CQ-102RC 1 to 6 g • cm
(0.014 to 0.083 oz • inch)
FF/REW CQ-201B 70 to 120 g • cm
(0.97 to 1.67 oz • inch)
set –
+
AF OSC
attenuator 10 kΩ
600 Ω
LINE IN
level mete
r
LINE OUT
47 kΩ
Standard Output Level
TestTape
Input terminal LINE IN
source impedance 10 kΩ
input signal level 0.5 V (–3.8 dBs)
Input terminal LINE IN
source impedance 10 kΩ
input signal level 0.5 V (–3.8 dBs)
Tape Contents Use
P-4-A100 10 kHz, –10 dB Azimuth Adjustment
WS-48B 3 kHz, 0 dB Tape Speed Adjustment
P-4-L300 315 Hz, 0 dB PB Level Adjustment

9
TC-WE675
Record/Playback Head Azimuth Adjustment
DECK A DECK B
Procedure:
1. Forward Playback Mode
2. Turn the adjustment screw for the maximum output levels. If
these levels do not match, turn the adjustment screw until both
of output levels match together within 1 dB.
3. Playback Mode
4. Change the reverse playback mode and repeat the steps 1 to 3.
5. After the adjustment, lock the adjustment screws with suitable
locking compound.
Adjustment Location: –record/playback head –
Tape speed Adjustment DECK A DECK B
Adjust DECK A first
Procedure:
–Forward Playback Mode –
(High speed adjustment)
1. Press the PITCH CONTROL button to set to OFF .
2. Set to test mode. (Refer to page 11.)
3. Press the Hbutton to playback.
4. Press the HIGH/NORMAL button to playback at double speed.
5. Adjust RV316 (DECK A), RV416 (DECK B) so that the fre-
quency counter reading becomes 5,980 ± 80 Hz.
(Normal speed adjustment)
6. Press the Hbutton to playback.
7. Press the HIGH/NORMAL button to playback at normal speed.
8. Adjust RV317 (DECK A), RV417 (DECK B) so that the fre-
quency counter reading becomes 3,000 ± 90 Hz.
(Pitch control adjustment) (DECK A)
9. Press the PITCH CONTROL button to set to ON .
10. Set PITCH CONTROL knob to mechanical center.
11. Press the Hbutton to playback.
12. Adjust RV318 so that the frequency counter reading becomes
2,990 ± 90 Hz.
Adjustment Location: MAIN board (See page 14.)
Sample value of wow and flutter
W.RMS (JIS) less than 0.3% .
(test tape : WS-48B)
Playback Level Adjustment DECK A DECK B
Procedure:
–Forward Playback Mode –
Adjust DECK A : RV111 (L-CH), RV211 (R-CH) and
DECK B : RV121 (L-CH), RV221 (R-CH) so the level meter read-
ing becomes the adjustment limits below.
Adjustment Value:
LINE OUT level : –7.7 dBs ± 0.5 dB (0.301 to 0.338 V)
Level difference between channels : within 0.5 dB
Confirmthatthe LINEOUT leveldoes notchange in playbackmode
while changing the mode from playback to stop several times.
Adjustment Location: MAIN board (See page 14.)
set
test tape
P-4-A100
(10 kHz, –10 dB) level mete
r
LINE OUT
47 kΩ
within
1 dB within
1 dB
output
level
R-CH
peak
R-CH
peak
L-CH
peak
L-CH
peak
screw
position screw position
VH
Screen Pattern
set
In phase 45˚90˚135˚180˚
good wrong
47 kΩ
47 kΩ
L-CH
R-CH
test tape
P-4-A100
(10 kHz, –10 dB)
LINE OUT
oscilloscope
forward sidereverse side
adjustment screws
set
frequency counter
47 kΩ
LINE OUT
test tape
WS-48B
(3 kHz, 0 dB)
set
test tape
P-4-L300
(315 Hz, 0 dB) level mete
r
LINE OUT
47 kΩ

10
TC-WE675
Bias Consumption Current Adjustment
DECK A DECK B
This adjustment should be performed when replacing the head assy
or the bias oscillator transformer (T131, T231),(T141, T241).
Setting:
REC LEVEL knob : standard recording position (See page 11.)
Procedure:
1. Connect the digital voltmeter to test point TP331 (DECKA) and
TP441 (DECK B).
2. Set DECK A: RV131 (L-CH), RV231 (R-CH) and DECK B:
RV141 (L-CH), RV241 (R-CH) to mechanical center.
3. Press the Hbutton to playback.
4. Adjust DECK A: T131 (L-CH), T231 (R-CH) and DECK B:
T141 (L-CH), T241 (R-CH) so that the digital voltmeter read-
ing becomes minimum.
Adjustment Value: Maximum 220 mV
Adjustment Location: MAIN board (See page 14.)
Record Bias Adjustment DECK A DECK B
Setting:
REC LEVEL knob : standard record position (See page 11.)
Procedure:
1. Set to test mode (See page 11.)
2. Insert a tape into deck B, press the REC zbutton and then
press the Hbutton to start recording.
Adjustment level:
The palyback output of 10 kHz level difference against 315 Hz ref-
erence should be ± 0.5 dB.
Adjustment Location: MAIN board (See page 14.)
Record Level Adjustment DECK A DECK B
Setting:
REC LEVEL knob : standard record position (See page 11.)
Procedure:
1. Set to test mode (See page 11.)
2. Insert a tspe into deck B, press the REC zbutton and then
press the Hbutton to start recording.
3. Record Mode
4. Playback Mode
set
AF OSC
attenuator 10 kΩ
600 Ω
LINE IN
1) 315 Hz
2) 10 kHz 50 mV (–23.8 dBs)
blank tap
e
CS-123
3. Record Mode
set
recorded
portion level mete
r
LINE OUT
47 kΩ
4. Playback Mode
5. Confirm playback the signal recorded in step 2 become adjust-
ment level as follows.
If the selevels do not adjustment level, adjust DECK A: RV131
(L-CH), RV231 (R-CH) and DECK B: RV141 (L-CH), RV241
(R-CH) to repeat steps 3 and 4.
set
AF OSC
attenuator 10 kΩ
600 Ω
LINE IN
blank tap
e
CS-123
315 Hz, 50 mV (–23.8 dBs)
set
recorded
portion level mete
r
LINE OUT
47 kΩ
5. Confirm playback the signal recorded in step 2 become adjust-
ment level as follows.
Ifthe selevelsdo not adjustmentlevel, adjust theDECKA:RV102
(L-CH), RV202 (R-CH) and DECK B: RV101 (L-CH), RV201
(R-CH) to repeat steps 3 and 4.
Adjustment Value:
LINE OUT level : –23.8 dBs ± 0.5 dB (47.2 to 53.0 mV)
Adjustment Location: MAIN board (See page 14.)
set
321
blank tape
CS-413
TP331 (DECK A)
TP441 (DECK B)
L-CHR-CH
digital
voltmeter
LINE IN
no signal

11
TC-WE675
Adjustment Location: main board
[MAIN board] (Component side)
RV111
PB LEVEL
DECK A (L)
RV211
PB LEVEL
DECK A (R)
TP331
REC
BIAS
T231
BIAS
CURRENT
DECK A (R)
BIAS CURRENT
DECK A (L)
REC BIAS
DECK A (L) RV231
REC BIAS
DECK A (R)
T131
RV131
RV318
PITCH
CONTROL
(DECK A)
RV317
NORMAL SPEED
(DECK A)
RV316
HIGH SPEED
(DECK A)
100
81
80
51 31
1
IC801
50
30
RV102
REC LEVEL
DECK A (L)
RV202
REC LEVEL
DECK A (R)
RV417
NORMAL
SPEED
(DECK B)
RV416
HIGH
SPEED
(DECK B)
RV241
REC BIAS
DECK B (R)
RV141
REC BIAS
DECK B (L)
RV201
REC
LEVEL (R)
REC
BIAS
T241
BIAS
CURRENT
DECK B (R)
BIAS CURRENT
DECK B (L)
T141
52
33
32 20
64
1
IC551
19
51
RV101
REC
LEVEL (L)
RV121
PB LEVEL
DECK B (L)
RV221
PB LEVEL
DECK B (R)
TP441

12
TC-WE675 SECTION 6
DIAGRAMS
6-1. CIRCUIT BOARDS LOCATION
TRANS (A) board ( v E)
(Except SP)
MAIN board
RECVOL board (
v G
)
H.P board ( v D)
HEAD RELAY (REC/PB) board
(Deck B)
HEAD RELAY (REC/PB) board
(Deck A)
LEAF SW (REC/PB) board
(Deck B)
PANEL board (
v A)
DIRECTION board (
v C)
POWER board (
v F)
LEAF SW (REC/PB) board
(Deck A)
TRANS (B) board ( v B)
•vA to vG are including into the mounted PANEL board.

13 13
TC-WE675
WAVEFORMS
– MAIN SECTION (3/4) –
THIS NOTE IS COMMON FOR PRINTEDWIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this,the necessary note is printed
in each block.)
For schematic diagrams.
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
• % : indicates tolerance.
•f: internal component.
•5: fusible resistor.
•C: panel designation.
For printed wiring boards.
Note:
•X: parts extracted from the component side.
•: Pattern from the side which enables seeing.
• Transistor of “B” and “C” indication is omitted.
•A: B+ Line.
•B: B– Line.
•H: adjustment for repair.
• Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : STOP
( ) : REC
< > : PB
∗: Can not be measured.
• Voltagesaretaken witha VOM (Inputimpedance 10MΩ).
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: PB
a: REC
• Abbreviation
CND : Canadian model.
AUS : Australian model.
SP : Singapore model.
• Indication of transistor
1
IC801 el EXTAL
Note:
The components identi-
fied by mark 0or dotted
linewith mark0are criti-
cal for safety.
Replace only with part
number specified.
Note:
Lescomposants identifiéspar
une marque 0sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
4.4Vp-p
10MHz
CThese are omitted EB

14 14
TC-WE675
6-2. PRINTEDWIRING BOARD – MAIN SECTION –
• See page 12 for Circuit Boards Location.
(Page 23)
(Page 23)
(Page 25)
(Page 21)
(Page 23)
(Page 23)
(Page 19)
(Page 23)
(Page 19)

15 15
TC-WE675
6-3. SCHEMATIC DIAGRAM – MAIN (1/4) SECTION –
D306 F-10
D307 F-10
D318 F-10
D351 F-11
D451 C-1
D521 E-9
D522 E-9
D601 A-6
D701 B-10
D702 B-10
D703 A-10
D704 A-10
D705 A-10
D706 A-10
D707 B-10
D708 A-7
D709 A-8
D710 B-8
D711 A-8
D712 A-10
D713 B-11
D714 C-10
D715 C-10
D716 B-11
D801 F-6
IC321 D-12
IC331 G-13
IC421 A-2
IC431 F-2
IC501 D-3
IC502 A-6
IC504 F-7
IC561 D-9
IC701 A-8
IC801 D-7
IC802 E-6
IC803 G-9
IC804 G-8
IC805 G-4
IC806 G-3
Q101 B-3
Q102 A-5
Q103 F-7
• Semiconductor Location
Ref. No. Location Ref. No. Location
Q104 C-5
Q201 C-2
Q202 A-4
Q203 F-7
Q204 E-1
Q302 H-7
Q303 H-7
Q306 F-10
Q307 G-10
Q308 F-10
Q311 H-8
Q314 H-8
Q316 G-10
Q317 G-10
Q318 G-10
Q341 D-13
Q342 D-13
Q343 D-13
Q351 G-11
Q371 C-10
Q373 C-10
Q402 G-6
Q403 G-6
Q411 G-5
Q414 G-5
Q417 F-5
Q441 G-2
Q442 H-2
Q443 H-2
Q451 C-1
Q471 C-8
Q473 C-8
Q501 A-5
Q502 E-9
Q503 E-9
Q505 G-11
Q506 F-3
Q601 A-5
Q701 A-8
Q702 A-7
Q703 A-9
Q704 A-10
Q707 C-10
Q708 C-11
Q801 F-6
(Page 22)
(Page
19)
(Page 18)
(Page 17)
(Page 16) (Page 16)
(Page 18)
(Page 17)
(Page 17)
(Page 17)

16 16
TC-WE675
6-4. SCHEMATIC DIAGRAM –MAIN (2/4) SECTION –
(Page 18)
(Page 18)
(Page 17)
(Page 22)
(Page
19)
(Page 18)
(Page 18)
(Page 17)(Page 17)
(Page 15)(Page 15)

17 17
TC-WE675
6-5. SCHEMATIC DIAGRAM – MAIN (3/4) SECTION –
• See page 13 forWaveforms.
• See page 14 for PrintedWiring Board.
• See page 26 for IC Pin Functions.
(Page
15)
(Page
15)
(Page 16) (Page 16) (Page 18) (Page 18) (Page 18) (Page 18)
(Page 22) (Page 22) (Page 20)
(Page 24)
(Page
15)
(Page
15)
(Page 16)

18 18
TC-WE675
6-6. SCHEMATIC DIAGRAM – MAIN (4/4) SECTION –
(Page 17) (Page 17) (Page 17)
(Page 15)
(Page
16)
(Page
16)
(Page 22)
(Page 16)
(Page
16)
(Page 15) (Page 17)

19 19
TC-WE675
6-7. PRINTEDWIRING BOARD – LEAF SW SECTION –
• See page 12 for Circuit Boards Location. 6-8. SCHEMATIC DIAGRAM – LEAF SW SECTION –
TO
MAIN BOARD
TO MAIN BOARD
(Page 14)
(Page 16)
* PLUNGER SOLENOID is supplied as the Mechanism Deck
(TCM-230ASR41B : A-2100-942-A).

20 20
TC-WE675
6-9. SCHEMATIC DIAGRAM – DISPLAY SECTION –
(Page 17)