Table of Contents
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1. POWER CHECK FLOW
A.
No 5V
Is 3.3VA
NO
section working?
YES
Is 5.6V present at
collector of Q126?
YES
Replace Q126.
B.
NO
NO
No 3.3VA
present at emitter
Check FR101
Is there a DC voltage at
Check D105/D106/D107/
NO
cathode of D105 or D107?
D108 and replace.
YES
Replace IC101.
2. SYSTEM OPERATION FLOW
No 3.3VA.
Is 3.3VA
section working?
YES
Is 3.3V
of Q121?
YES
YES
Replace Q121.
YES
NO
Power on
1. 8032 initializes SERVO,DSP & RISC registers
2. Write RISC code to SDRAM
3. Reset RISC
Show LOGO
Tray closed ?
NO
Tray close to closed position
SLED at inner side ?
NO
SLED moves to inner position
1. Judge whether have disc and disc type
2. Jump to related disc reading procedure
Recieve OPEN/CLOSE Key?
NO
1. Execute pressed Key & IR key
2. System operation routine loop
1. Stop playback & open Tray
2. Display tray open message & LOGO
Receive CLOSE Key?
YES
YES
YES
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