Zenith XBV613 Service Manual - Page 55

Zenith XBV613 - DVD/VCR Combination Manual

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Page 55 highlights

C Laser turns on when reading disc? YES NO LD_DVD or LD_CD output properly? NO Check the laser power circuit on ZR36882 and connecting to power transistor. YES Collector voltage of power NO transistor is OK? YES Check cable connection between transistor ouput and pick-up head. Check the related circuit on laser power transistor Put disc in? YES Disc ID is correct? YES NO Laser off NO Proper RF signal on NO ZR36882? YES Check LD_DVD & LD_CD signal Check the related circuit on ZR36882 RFL signal. Does spindle rotate? YES D NO Proper SPINDLE_S signal NO on ZR36882 YES SP+ & SP- output properly? NO YES Check the cable connection between spindle and main PCBA. Check SPINDLE_S related circuit on ZR36882. Check the spindle control amp circuit of motor driver. 3-62

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3-62
C
LD_DVD or LD_CD
output properly?
Laser turns on when
reading disc?
Put disc in?
Disc ID is correct?
Does spindle rotate?
D
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
Check the laser power circuit
on ZR36882 and connecting
to power transistor.
NO
Collector voltage of power
transistor is OK?
Check the related circuit on
laser power transistor
NO
Check cable connection
between transistor ouput
and pick-up head.
YES
YES
YES
Check the related circuit
on ZR36882 RFL signal.
Check SPINDLE_S related
circuit on ZR36882.
NO
NO
Check the spindle control
amp circuit of motor driver.
NO
Laser off
Proper RF signal on
ZR36882?
Check LD_DVD & LD_CD
signal
Proper SPINDLE_S signal
on ZR36882
SP+ & SP- output properly?
Check the cable connection
between spindle and main
PCBA.