3-21
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
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
Check the connection
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
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
Summary of Contents for DVP7771
Page 8: ...2 3 Deck Mechanism Section 430 430 001 430 002 002 006 005 004 003 002 431 431 007...
Page 32: ...MEMO...
Page 37: ...3 15 3 16 LCD P C BOARD LOCATION GUIDE LOCATION GUIDE...
Page 38: ...MEMO MEMO...
Page 44: ...3 42 3 43 6 PANTER CIRCUIT DIAGRAM waveforms page 3 58 3 59 2002 02 01 R14113A...
Page 45: ...3 44 3 45 7 MEMORY CIRCUIT DIAGRAM 2002 02 01 R14114A...
Page 47: ...3 48 3 49 9 CPLD CIRCUIT DIAGRAM 2002 02 01 R14116A...
Page 54: ...3 62 3 63 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE LOCATION GUIDE...
Page 55: ...3 64 3 65 2 FRONT KEY P C BOARD LOCATION GUIDE LOCATION GUIDE...
Page 56: ...MEMO MEMO...
