Sony TC-WE675 Service Manual ▷ View online
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)
(Deck B)
HEAD RELAY (REC/PB) board
(Deck A)
(Deck A)
LEAF SW (REC/PB) board
(Deck B)
(Deck B)
PANEL board (
v
A)
DIRECTION board (
v
C)
POWER board (
v
F)
LEAF SW (REC/PB) board
(Deck A)
(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) –
– MAIN SECTION (3/4) –
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
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
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W 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
(
no mark : STOP
(
) : REC
<
> : PB
∗
: Can not be measured.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
E
: PB
a
: REC
• Abbreviation
CND : Canadian model.
AUS
AUS
: Australian model.
SP
: Singapore model.
• Indication of transistor
1
IC801
el
EXTAL
Note:
The components identi-
fied by mark
The components identi-
fied by mark
0
or dotted
line with mark
0
are criti-
cal for safety.
Replace only with part
number specified.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
4.4Vp-p
10MHz
C
These are omitted
E
B
14
14
TC-WE675
6-2. PRINTED WIRING BOARD – MAIN SECTION –
• See page 12 for Circuit Boards Location.
(Page 23)
(Page 19)
(Page 19)
(Page 23)
(Page 23)
(Page 21)
(Page 23)
(Page 25)
(SUPPLEMENT-1: Page 4)
NEW TYPE
FORMER TYPE
(Page 23)
Ver 1.3 2002.09
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