Sony SA-WRT4 - Audio Output and Power Failures

HT-RT4/RT40
17
3. The sound is not outputted
Check that the signal is outputted from
MAIN board (RT4) / EG4 MAIN board
(RT40) IC1000:
pin 27, 28, 32 (CENTER speaker)
pin 35 (FRONT L speaker)
pin 39, 40 (FRONT R speaker)
Check that the signal is inputted to
MAIN board (RT4) / EG4 MAIN board
(RT40) IC1001:
pin 24 (FRONT L, FRONT R speakers)
pin 25 (SUR L, SUR R speakers)
pin 27 (CENTER speaker, Subwoofer)
Check that the signal is outputted from
MAIN board (RT4) / EG4 MAIN board
(RT40) IC1001:
pin 38, 39 (CENTER speaker)
pin 41 (FRONT L speaker)
pin 43 (FRONT R speaker)
pin 45 (SUR R speaker)
pin 47 (SUR L speaker)
pin 48, 49 (Subwoofer)
Yes
Yes
Check that the signal is outputted from
MAIN board (RT4) / EG4 MAIN board
(RT40) IC1002:
pin 27, 28, 32 (Subwoofer)
pin 35 (SUR R speaker)
pin 39, 40 (SUR L speaker)
Yes
Reprogram MAIN board (RT4) / EG4
MAIN board (RT40) IC2000 (serial
flash) and check the signal again.
No
Check the Subwoofer, Bar speaker
(FRONT L, FRONT R, CENTER
speakers) and Surround speaker
(SUR L, SUR R speakers) are
functionable.
Yes
Replace the speaker which is not
functionable.
No
No
Replace MAIN board (RT4) / EG4
MAIN board (RT40) IC1002.
No
No
Replace MAIN board (RT4) / EG4
MAIN board (RT40) IC1001.
No
Replace MAIN board (RT4) / EG4
MAIN board (RT40) IC1000.
Replace complete MAIN board (RT4) /
EG4 MAIN board (RT40).