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TROUBLE SHOOTING
YES
Push the laser head to outer
rail, check if can auto introskip
by power on
YES
Look into if with focus action
and laser output or not
YES
Disc is running or not
YES
CD Reading ok
E:
YES
Check USB socket if with 5.2V
voltage is normal or not
YES
Check 1st feet of IC108（USB_SW)
if with low level or not
YES
Check DM,DP signal if normal or
not
YES
NO USB
Check IC605'S RESET signal,
NO
IC602 and IC605's VOSL+,VOSL-
signal and 6PIN soft flat cabel
Check IC602's FOCUS,TRACK
signal，Check Q601 is with LD
NO
signal，loader and main board
's FFC cabel
Check IC602's SPINDLE signal
NO
and 6PIN soft flat cable
Check Q5，Q6，Q9 main board and
USB board's USB connecting
wire.
YES
NO
Check L2 if with 5.2V voltage
is normal or not
NO
Refer to A's maintenance method
Check IC101
NO
Check R52,R58,D701,
NO
D702,L704,L705,R744,R745,IC108
etc components
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