JVC HR-XV45SEF Service Manual page 61

C
Laser turns on when NO
reading disc?
YES
NO
Put disc in?
YES
NO
Disc ID is correct?
YES
NO
Does spindle rotate?
YES
D
NO
LD01 or LD02 output
properly?
YES
Collector voltage of NO
power transistor is OK?
YES
Check cable connection between
transistor ouput and pick-up head.
Laser off
Proper RFL NO
signal on MT1389?
YES
Check LD01 & LD02 signal
Proper
NO
DMS0 signal on
MT1389
YES
SP+ & SP- output
NO
properly?
YES
Check the cable connection
between spindle and main PCBA.
Check the laser power circuit
on MT1336 and connecting to
power transistor.
Check the related circuit on
laser power transistor
Check the related circuit
on MT1389 RFL signal
Check DMS0 related
ci rcuit on MT1389
Check the spindle control
amp circuit of motor driver.
(No.YD070)1-61