2.1.3. Subwoofer out
Check Soldering or replace device.
SMPS PCB ➡ MAIN PCB
[BN92] 7pin ➡ [CN92] 7pin
➡ [L706]
[BN92] 4pin ➡ [CN92] 4pin
➡ [L705]
Check Soldering or replace device.
2.1.1. Check up to the shared section (ANALOG/DIGITAL ➡ SEL
SPK Output) in the PRE AMP circuit
MAIN PCB
[IC68]
[IC67]
Check Soldering or replace device.
MAIN PCB
[Q659], [Q660], [Q630], [Q631], [Q632]
[Q632] Base = "Hi" = Mute OFF
N.G.
N.G.
N.G.
Check Power Supply Voltages for Subwoofer.
MAIN PCB
[IC68] 8pin, [IC67] 8pin : +12V
[IC68] 4pin, [IC67] 4pin : -12V
Check the Audio input and output.
MAIN PCB
[IC68] 3pin : Lch / 5pin : Rch Audio Signal is being input
[IC68] 1pin : Lch / 7pin : Audio Signal is being output from Rch
[IC67] 7pin : Audio Signal after L.P.F is output from L+R ch
Check the MUTE circuit.
MAIN PCB
Check that the Audio signal is muted by [Q659], [Q660].
No faults
Identify the input function from which sound is not output or
from which noise occurs, and then check the troubleshooting
sections from 2.2 onwards.
O.K.
O.K.
O.K.
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