Sony RB1G Service Manual page 307

Troubleshooting
3-3-1. No Sound : Audio (For all models)
#1
#1
No signal
Check the
Digital out
(use Video input)
OK
Check the
Speaker Sound
(use Video input)
NG
OK
Check the HP out
(use Video input)
NG
Check the IC4501
VDD 3.3V
(IC4501 pin9)
OK
No signal
Check the
IC9000 is NG
CN4801 pin1
(SPDIF input)
OK
CN4801 is NG
Power Amp Block (F4601,IC4601,etc)
is NG. See item: LED blinking 3x
(Audio error)
OK
No Problem
NG DC/DC converter is NG
See No POWER DC / DC
Converter Check
W600A/ W603A/ W605A/ W607A/ W650A/ W651A/ W653A/
W654A/ W655A/ W656A/W657A/ W658A/ W670A/ W674A
Check the
NG
of IC4501 CP & CN
IC4501 VSS -3.3V
(IC4501 pin6)
OK
Check the
NO
X_AUDIO_MUTE_
SPHPLO
pin5 is HIGH?
OK
No signal
Check the
INR+ & INL+ pin1 &14.
(at CL4502 and CL4501)
Signal is coming?
OK
IC4501 NG
RB1G CHASSIS
Size B* Board Type
(Segment: LW)
OTHERS EUROPE JP
24" BLX BLE BLJ
32" BKX/BLX BKE/BLE BKJ/BLJ
42" BKX/BLX BKE/BLE BKJ/BLJ
50" BLX BLE -
Check the solder
NG
(7&8pin) & C4501
OK
Solder NG
IC4501 NG
This is MUTE situation.
Check IC9000
IC9001 is NG
Note:
(AYU2/Ayu2L) –
IC9000
(Brownie)- IC9001
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