Sony RB1G Service Manual page 317

Troubleshooting
3-3-3. Main Board Power Off Checking (for Main SP Lch & Rch)
No Checking Item
1 Check fuse F4601
2 Check connectivity audio Vcc to GND
C4606 – GND
C4607 – GND
C4608 – GND
C4609 – GND
3 Check connectivity audio +3.3V_MAIN to GND (only for BKE
,BKX, BKJ, BLE ,BLX and BLJ board)
IC4601 (Pin8) – GND
IC4601 (Pin27) – GND
4 Check connectivity audio output to GND.
CN4601
Pin 1 – GND
Pin 2 – GND
Pin 3 – GND
Pin 4 – GND
OK
Fuse short
No short to GND
No short to GND
No short to GND
W600A/ W603A/ W605A/ W607A/ W650A/ W651A/ W653A/
W654A/ W655A/ W656A/W657A/ W658A/ W670A/ W674A
NG
Fuse open
Either 1 short to GND
Either 1 short to GND
Either 1 of pin short to GND
Size B* Board Type
(Segment: LW)
OTHERS
24" BLX
32" BKX/BLX
42" BKX/BLX
50" BLX
RB1G CHASSIS
EUROPE JP
BLE BLJ
BKE/BLE BKJ/BLJ
BKE/BLE BKJ/BLJ
BLE -
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