DOWNLOAD Sony TC-WE625 / TC-WE725 / TC-WE825S / TC-WE835S Service Manual ↓ Size: 4.88 MB | Pages: 43 in PDF or view online for FREE

Model
TC-WE625 TC-WE725 TC-WE825S TC-WE835S
Pages
43
Size
4.88 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
tc-we625-tc-we725-tc-we825s-tc-we835s.pdf
Date
PREV: Sony TA-VA70 Service Manual

Sony TC-WE625 / TC-WE725 / TC-WE825S / TC-WE835S Service Manual ▷ View online

– 13 –
Pin No.
Pin Name
I/O
Pin Description
52
BIAS CAL 1 (B)
O
EQ bias CAL-1 output for auto calibration. (DECK B)
53
BIAS CAL 2 (B)
O
EQ bias CAL-2 output for auto calibration. (DECK B)
54
BIAS CAL 3 (B)
O
EQ bias CAL-3 output for auto calibration. (DECK B)
55
BIAS CAL 0 (A)
O
EQ bias CAL-0 output for auto calibration. (DECK A)
56
BIAS CAL 1 (A)
O
EQ bias CAL-1 output for auto calibration. (DECK A)
57
BIAS CAL 2 (A)
O
EQ bias CAL-2 output for auto calibration. (DECK A)
58
BIAS CAL 3 (A)
O
EQ bias CAL-3 output for auto calibration. (DECK A)
59
CAP.M (B)
O
Capstan motor driver output (DECK B) “H” : ON
60
CAP.M (A)
O
Capstan motor driver output (DECK A) “H” : ON
61
CAP.M H/L
O
Capstan motor high/normal select output “L” : ON
62 – 77
P16 – P1
O
Fluorescent indicator tube segment driver
78 – 85
G1 – G8
O
Fluorescent indicator tube grid driver
86
G6,G7
O
Fluorescent indicator tube grid driver
87
G7,G8
O
Fluorescent indicator tube grid driver
88
VFDP
—
Fluorescent indicator tube power supply (-28 V)
89
VDD
—
Power supply (+5 V)
90
N.C
—
Connected to power supply.
91
VSS
—
Ground
92
REEL (A) +
O
Reel motor (+) output (DECK A)
93
REEL (A) -
O
Reel motor (-) output (DECK A)
94
REEL (B) +
O
Reel motor (+) output (DECK B)
95
REEL (B) -
O
Reel motor (-) output (DECK B)
96
BIAS (A)
O
Bias ON/OFF output (DECK A) “H”:ON
97
RELAY (A)
O
Relay record/playback selector output (DECK A) “L” : Record
98
BIAS (B)
O
Bias ON/OFF output (DECK B) “H” : ON
99
RELAY (B)
O
Relay record/playback selector output (DECK B) “L” : Record
100
S-REEL (A)
I
Supply reel rotation detection input (DECK A)
5-2. CIRCUIT BOARDS LOCATION
– 14 –
•
 For schematic diagrams.
• 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 
Ω
 and 
1
/
4
 
W or less unless otherwise
specified.
•
%
: indicates tolerance.
•
¢
: internal component.
•
1
: fusible resistor.
•
C
: panel designation.
•
U
: B+ Line.
•
V
: B– Line.
•
H
: adjustment for repair.
• Voltage is dc with respect to ground under no-signal
(detuned) condition.
Note:
The components identi-
fied by mark 
!
 or dotted
line with mark 
!
 are criti-
cal for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque 
!
 sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
•
 For printed wiring boards.
• X
: parts extracted from the component side.
•
®
: Through hole.
• b
: Pattern from the side which enables seeing.
(The other layers’ patterns are not indicated.)
: Chip transistor of abbreviation (E, C, B)
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS
AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
no mark : PB (DECK A)
(
) : REC (DECK A)
<
> : PB (DECK B)
[
] : REC (DECK B)
<<     >> : STOP
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerances.
• Signal path.
E
: PB (DECK A)
a
: REC (DECK A)
d
: PB (DECK B)
G
: REC (DECK B)
• Abbreviation
CND : Canadian model.
AUS
: Australian model.
SP
: Singapore model.
MY
: Malaysia model.
CH
: Chinese model.
AUDIO (B) board
LEAF SW (B) board
LEAF SW (A) board
FL board
HEADPHONE board
REC VOL board
MAIN board
TRANS (B) board
AUDIO (A) board
SW (C) board
SW (A) board
SW (B) board
TRANS (A) board
DOLBY-S board
(WE825S)
(Except Singapore, Malaysia)
(Except US, Canadian)
(Except US,
       Canadian)
(US, Canadian)
BCE
5-3. PRINTED WIRING BOARDS — MAIN SECTION —
TC-WE625/WE725/WE825S
– 15 –
– 16 –
(Page 35)
(Page 35)
(Page 33)
(Page 33)
(Page 28) (Page 15)
(Page 27)
(Page 31)
(Page 31)
(Page 31)
(Page 28)
(Page 31)
(Page 28)
(Page 25)
5-4. SCHEMATIC DIAGRAM — MAIN SECTION (1/4) — • Refer to page 37 for IC Block Diagrams.
TC-WE625/WE725/WE825S
– 17 –
– 18 –
Ref. No.
Location
D101
E-6
D201
E-6
D401
A-4
D521
B-1
D522
B-1
D601
H-6
D602
H-6
D701
A-9
D702
A-8
D703
B-8
D704
B-8
D705
A-8
D706
A-8
D707
B-8
D708
A-5
D709
A-5
D710
A-6
D711
B-6
D712
A-8
D713
A-8
D714
C-8
D715
B-7
D716
C-8
D801
F-8
D802
F-8
D803
F-8
D804
F-8
IC501
C-2
IC502
F-1
IC504
E-12
IC561
A-1
IC601
E-10
IC701
A-6
IC801
F-7
IC802
F-6
IC803
E-6
IC804
E-5
IC805
F-4
IC806
G-12
IC807
G-12
IC808
G-3
IC809
G-4
Q101
E-2
Q102
A-3
Q201
D-1
Q202
A-3
Q401
A-4
Q451
G-13
Q452
F-11
Q453
F-12
Q461
G-2
Q462
F-3
Q463
F-3
Q501
B-3
Q502
B-1
Q503
B-1
Q601
H-6
Q602
H-6
Q603
H-6
Q604
H-7
Q605
H-6
Q606
H-7
Q607
H-7
Q621
D-13
Q701
A-7
Q702
B-6
Q703
A-8
Q704
A-8
Q705
A-7
Q706
A-8
Q707
B-8
Q708
C-8
Q801
F-8
Q802
D-7
• Semiconductor
Location
(Page 32)
(Page
32)
(Page 31)
(Page 32)
(Page 19)
(Page 21)
(Page 23)
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