Sony RB1G, Service Manual

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RB1G CHASSIS
W600A/ W603A/ W605A/ W607A/ W650A/ W651A/ W653A/
W654A/ W655A/ W656A/W657A/ W658A/ W670A/ W674A
No Sound
HP / Lineout only
BA2 / BM / BKE / BKX Power
On checking
This is for Main SP got sound, but HP / Lineout no sound
101
3-3-5. No Sound: HP / Lineout Only
Troubleshooting
No Checking Item OK NG If

NG
1 Insert HP Jack. Check R4508
Vdc = 3.3V ± 0.3V Vdc = 0V or < 1V Check HP_DET line
(R8113 – for BA2 and BM)
(R8124 – for BKE and BKX) got
short to GND?
2 Check IC4501 Pin 5
(X_AUDIO_MUTE_ SPHPLO) Vdc = 3.3V ± 0.3V Vdc = 0V or < 1V
Check X_AUDIO_ MUTE1_ SPHLO
(Pin 5) short to GND?
3 Check CL4505, CL4506.
(with audio signal input) Can see audio signal
waveform Cannot see audio signal
waveform Go to below item No. 4 for checking
4 Check IC4501 pin 9 Vdc = 3.3V ± 0.3V No 3.3V supply
5 Check CL4501, CL4502
(with audio signal input) Can see audio signal
waveform Cannot see audio signal
waveform Brownie IC (IC9001) NG
RB1 Main Board Power On Checking
Note:
(AYU2) – IC9000
(Brownie)- IC9001
Size B* Board Type
(Segment: LW)
OTHERS EUROPE JP
32” BKX BKE BKJ
42” BKX BKE BKJ