JVC XV-M565BK Service Manual page 23

(9) Neither picture nor sound is output
* Cannot search
a) Can the feed system be driven?
TRSDRVA and TRSDRVB line signal
Check the voltage of IC201 between pin no. 104 and R273 and pin no. 105 and R277.
After checking the voltage of the driver (IC271) pin nos. 9,10,12 and 13, check the signals
of FMA+, FMA-, FMB+ and FMB-.
b) Is kick available?
Check the TRDRV signal waveform from R285.
Check the waveform of CN102 "8" and "10" --- After the driver (IC271)
(10) Picture is distorted or abnormal sound occurs at intervals of several seconds.
Does JITOUT(IC101"64")
change periodically?
If this voltage is too
high, feed motor
may be defective, or
the mechanical unit
has seized.
(11) Others (unusual events experienced to date)
* Problem occurs with double-layer discs although no problem occurs with single-layer DVD.
(Error occurs, or search becomes unstable and takes longer.)
Crosstalk might occur from tracking to focus system.
--- When FE was observed during search (skip, etc.), it was found that a wave resembling TE
with an amplitude of 200mVp-p was riding on FE.
--- Mechanical unit was replaced.
* Error frequently occurred in the outer part of discs although no error occurred in the inner part.
--- Mechanical unit was replaced because tilt seemed to be defective.
(12) CD During normal playback operation
a) Is TOC reading normal?
Displays total time
for CD-DA.
Shifts to double-speed
mode for V-CD.
YES
b)Playback possible?
Some system other
NO
than servo may be
YES
NO
Please refer to "Servo Volume" flow.
NO
*The OSD screen remains on the "No reading" display.
According to [*Cannot serch ] for DVD(9), check the feed
and tracking systems.
*No sound is output although the time is displayed.(CA-DA)
DAC, etc, other than servo.
*The passage of time is not stable, or picture is abnormal.(V-CD)
The wound of the disc and dirt are confirmed.
defective.
XV-M565BK/M567GD
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