Kara Section Flowchart
Check voltage supply to all ICs:
Yes
No
Yes
No
Replace Q402.Symptom improve?
No
Replace blown fuse. Symptom improve?
9-11
IC401:Pin 8(AU_12V), Pin 4(AU_-12V)
Check the fuse, have the fuse blown?
replace MB board:PS901
Yes
Replace Q401,Q402.
Symptom improve?
Check IFCON_MUTE Signal, is there 3.3V atR996?
Yes
No
No
BDP-S485
No
To Power Supply (System) flowchart
MIC does not work
IC402:Pin 8(AU_12V), Pin 4(AU_-12V)
IC403:Pin 8(AU_12V),
IC404:Pin 8(AU_12V)
IC904:Pin 8(AU_12V), Pin 4(AU_-12V)
Check XMIC signal,is there 0.6V at Pin 3,CN401
No
Replace IC401,IC402.
Symptom improve?
No
Replace the MC Board
Check Mic Mute Signal, is there 3.3V at R972?
Check R1602, is there 3.3V?
Replace IC1203.
Symptom improve?
Replace the MB Board
Replace the MB Board
No
No