Sony HT-RT3 Service Manual page 16

HT-RT3
Ver. 1.4
3. The sound is not outputted
Check the Subwoofer, Bar speaker
(FRONT L, FRONT R, CENTER
speakers) and Surround speaker
(SUR L, SUR R speakers) are
functionable.
Yes
Check that the signal is inputted to
MAIN board IC1001:
pin 24 (FRONT L, FRONT R speakers)
pin 25 (SUR L, SUR R speakers)
pin 27 (CENTER speaker, Subwoofer)
Yes
Check that the signal is outputted from
MAIN board 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
Check that the signal is outputted from
MAIN board IC1000:
pin 27, 28, 32 (CENTER speaker)
pin 35 (FRONT L speaker)
pin 39, 40 (FRONT R speaker)
Yes
Check that the signal is outputted from
MAIN board IC1002:
pin 27, 28, 32 (Subwoofer)
pin 35 (SUR R speaker)
pin 39, 40 (SUR L speaker)
16
No Replace the speaker which is not
functionable.
No
Replace complete MAIN board.
No
Replace MAIN board IC1001.
No
Replace MAIN board IC1000.
No
Replace MAIN board IC1002.