Circuit Boards Location - Sony TC-WE425 Service Manual

5-2. CIRCUIT BOARDS LOCATION

POWER2 board
(US, Canadian)
POWER1 board
(Except US, Canadian)
DIRECTION board
(Except US, Canadian)
HEAD RELAY (PB) board
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS
AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
• For printed wiring boards.
• X : parts extracted from the component side.
• b : Pattern from the side which enables seeing.
• Transistor of "B" and "C" indication is omitted.
E C B
omitted
• 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
specified.
• % : indicates tolerance.
• : internal component.
¢
• 1 : fusible resistor.
• C : panel designation.
Note: Note:
Les composants identifiés par
The components identi-
une marque ! sont critiques
fied by mark ! or dotted
line with mark ! are criti- pour la sécurité.
cal for safety. Ne les remplacer que par une
piéce portant le numéro
Replace only with part
spécifié.
number specified.
• U : B+ Line.
• V : B– Line.
• H : adjustment for repair.
• Voltage is dc with respect to ground under no-signal
(detuned) condition.
LEAF SW (A) board
DISPLAY board
LEAF SW (B) board
W or less unless otherwise
POWER board
H.P board (TC-WE425/WE525)
HEAD RELAY (REC) board
no mark : PB (DECK B)
( ) : REC (DECK B)
< > : PB (DECK A)
[ ] : STOP
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Signal path.
E
: PB (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.
– 16 –
MAIN board
RECVOL board