Flowchart - Sony CDL1100 Service Manual

6-3-4-2. Flowchart

Note: These flowchart is described assuming that IC failure causes any trouble.
Start
Mechanical or Electrical trouble ?
Electrical
Nothing in action in Power-On ?
Proceeding Adjustment Action
BU/Main PWB/HP PWB
dependent ?
(check by swapping BU or PWBs.)
Main PWB dependent
Power-On Reset actions Completes or
Failed/action NG ?
Completed
SCSI command execution
communication OK or NG ?
(check with any SCSI command)
OK
Read Operation
OK
End
16
Mechanical
No action
BU dependent
HP PWB dependent
Failed /NG
NG
Access Time NG
Read Data Error
Flowchart (1) Repairing/Trouble Shooting-General
Mechanical Checking/Repairing
IC303 (CPU) failure
IC305 (gate-array) failure
IC304 (Flash-ROM) failure
BU/OP checking/Replace BU
HP PWB checking
IC201 (CD DSP/servo IC) failure
IC101 (RF Amp IC) failure
Drive ICs failure
Refer to Flowchart (2)-Power-on Reset Actions
IC301 (CDROM/SCSI I/F IC) failure
IC304 (Flash-ROM) failure
IC201 (CD DSP/servo IC) failure
Motor Driver ICs failure
IC301 (CDROM/SCSI I/F IC) failure
IC302 (buffer RAM) failure