7
D
VF-3400
TR
OUBLESHOO
TING
1. POWER CHECK FLOW
2. SYSTEM OPERATION FLOW
Is 5.6V present at
collector of Q126?
No 3.3VA
YES
YES
YES
YES
No 5V
No 3.3VA.
Replace Q126.
Check FR101
Replace Q121.
YES
Is there a DC voltage at
cathode of D105 or D107?
YES
NO
NO
NO
NO
Replace IC101.
A.
B.
Check D105/D106/D107/
D108 and replace.
Is 3.3VA
section working?
Is 3.3VA
section working?
Is 3.3V
present at emitter
of Q121?
Power on
1. 8032 initializes SERVO,DSP & RISC registers
2. Write RISC code to SDRAM
3. Reset RISC
Show LOGO
Tray close to closed position
SLED moves to inner position
1. Judge whether have disc and disc type
2. Jump to related disc reading procedure
1. Execute pressed Key & IR key
2. System operation routine loop
1. Stop playback & open Tray
2. Display tray open message & LOGO
NO
YES
YES
NO
YES
YES
NO
NO
Tray closed ?
SLED at inner side ?
Recieve OPEN/CLOSE Key?
Receive CLOSE Key?
Содержание DVF-3400-B
Страница 4: ...4 DVF 3400 BLOCK DIAGRAM 1 OVERALL BLOCK DIAGRAM ...
Страница 5: ...5 DVF 3400 BLOCK DIAGRAM 2 SERVO BLOCK DIAGRAM 3 MPEG MEMORY BLOCK DIAGRAM MECHANISM DECK ...
Страница 6: ...6 DVF 3400 BLOCK DIAGRAM 4 VIDEO BLOCK DIAGRAM 5 AUDIO BLOCK DIAGRAM Rch Lch ...
Страница 32: ...DVF 3400 ...