Sony DVP-FX700 Service Manual ▷ View online
9-5
3. Front Circuit(Dogotrpm & Key)
NO
NO
NO
START
Does remote control
work normally?
Do all the
buttons work
normally?
Check waveform of
IC701 Pin 46,47.
Check waveform
of IC701 Pin 59.
Is Digitron on normally?
Check waveform of
IC701 Pin52, 54, 55, 56?
LED ON?
Check waveform
of IC701
Check and Replace
IC 2M5
IC 2M5
Pin 67.
when power S/W turn on,
Is oscillation of X704
normal?
- Check and Replace C704,
R709, R710, R711
- Solder defective parts again
T701
R709, R710, R711
- Solder defective parts again
T701
Check the connection
of CON901, CON701.
of CON901, CON701.
Check waveform
of IC701 Pin 46,47.
Does pulse
waveform of RC901 Pin 1
appear?
Is IC701
Pin 49 connected to
RC901 Pin 1 ?
Is RC901 Pin 2 5V?
Power on.
Check
-R701~706, R728~R736, R743, R738
-R551~R558
-R701~706, R728~R736, R743, R738
-R551~R558
and replace
Check and Replace
Q701, Q501.
Solder defective parts
Replace IC701.
Solder Key part.
Check Power.
Replace IC702.
Replace IC701.
Replace LED903 .
Replace RC901.
Re-solder.
Recheck
Replace IC701.
Complete repairing Front B/D.
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
9-6
4. RF/Servo Circuit
A.
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Check the related circuit
on MT1336 RFL signal .
on MT1336 RFL signal .
Laser off
Proper RFL signal
on MT1336?
Proper
DMSO signal on
MT1379
Check DMSO related
circuit on MT1379.
circuit on MT1379.
Check the cable connection
between spindle and main PCBA.
between spindle and main PCBA.
Check the RFL connection
between MT1336 and MT1379.
between MT1336 and MT1379.
Put disc in?
Disc ID is correct?
Does spindle rotate?
D
9-7
B.
D
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Focus ON OK?
Track On OK?
Disc is play?
E
Proper
signals on A, B, C,
D of MT1336
Check connections between
MT1336 and pick-up head.
MT1336 and pick-up head.
Proper FEO signal
on MT1336?
Proper FEO signal
on MT1336?
Check the related circuit
on MT1336 FEO sugnal .
on MT1336 FEO sugnal .
Check the related
circuit on MT1336
circuit on MT1336
Properly TRSO signal
on MT1379?
T+ & T- output
properly?
Check the TRSO connection
on MT1379 and motor dirver.
on MT1379 and motor dirver.
Check the tracking control
amp circuit on motor driver.
amp circuit on motor driver.
Check cable connection on
pick-up head.
pick-up head.
Check RF signal waveform.
Check FEO connection
between MT1336 and MT1379
between MT1336 and MT1379
9-8
C.
E
Normal
Audio output
when disc playback?
Normal
IR. VFD & Front
pannel key
functions?
TEST END
Audio
DAC received
correct data stream?
Normal
Audio DAC
out? (IC601)
Check Audio filter, amplify, mute
circuit. (IC602 Application circuit)?
circuit. (IC602 Application circuit)?
Check the cable connection
on Front pannel.
on Front pannel.
Check connection between MT1379
& Audio DAC. (Check VRST#, ACLK,
ABCK, ASDAT3)
& Audio DAC. (Check VRST#, ACLK,
ABCK, ASDAT3)
Check the related circuit of
Audio DAC. (Check Audio
out Pin 14, 15,18,19)
Audio DAC. (Check Audio
out Pin 14, 15,18,19)
Check communi cation lines
on MT1379.
on MT1379.
Communications
between IR.VFD Front pannel key
& MT1379 & Front u-com(IC901)
is normally?
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