Sony RB1G Service Manual page 268

Troubleshooting
3-1-2-2. No POWER: Ayu2L Control
No Power
Check STBY_+3.3V NG
at AYU2L
(H15, H16, H17 pin
 C7407)
OK
Check STBY_+1.8V
NG
at AYU2L
(H19 pin
 C7403)
OK
Check STBY_+1.0V
NG
at AYU2L
(J15, J16, J17 pin  C7408)
OK
NG
Check Xtal oscillation
X7302, 32.768KHz
(A23, B23 pin  R7386)
OK
look for where
STBY_+3.3V is NG.
look for where
STBY_+1.8V is NG.
look for where
STBY_+1.0V is NG.
Replace X7302 or Ayu2L
Check AC_MON NG
at AYU2L
(C11 pin  R7352)
OK
Check MAIN_PWR NG
at AYU2L
(C13 pin  R7344)
OK
NG
Check REG+19V
at F9301(BL*)
OK
It might be power supply problem
Please refer "DC/DC converter check" sheet
Or
Check "STBY LED BLINKING"
Note:
(AYU2L) – IC9000
(Brownie)- IC9001
W600A/ W603A/ W605A/ W607A/ W650A/ W651A/ W653A/
W654A/ W655A/ W656A/W657A/ W658A/ W670A/ W674A
Note:
G BOARD : ( N/A FOR THIS MODEL)
Adapter failure (LW)
Replace AYU2L
Adapter failure (LW)
Size B* Board Type
(Segment: LW)
OTHERS EUROPE
24" BLX BLE
32" BLX BLE
42" BLX BLE
50" BLX BLE
RB1G CHASSIS
JP
BLJ
BLJ
BLJ
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