Sharp DV-RW250H (serv.man2) Service Manual ▷ View online
TROUBLESHOOTING GUIDE
E-23
YES
YES
YES
YES
NO
NO
NO
NO
AT E-E, NO SOUND
Does normality AUDIO
JACK CONNECT?
Connection is done over again.
Is there audio signal at
pin 78, 80 of IC701 ?
Check J8001
and peripheral circuit.
Change IC701.
Is there audio signal at
pin 9, 11, 72, 74
of IC701 ?
Check J8001, J651, J652
and peripheral circuit.
Is there audio signal of
J8001 at pin 1, 3 ?
TROUBLESHOOTING GUIDE
E-24
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
E-E AUDIO (MONO)
DOES NOT APPEAR
Does E-E AUDIO
(STEREO) appear?
Is the voltage at pin 92
of IC101 5V ?
Refer to section "E-E AUDIO
(STEREO) DOES NOT APPEAR".
Check POWER BLOCK.
Is the voltage at pin 95
of IC3001 5V ?
Change IC3001.
Check J8001.
Change IC701.
Is there audio signal at
pin 11, 74 of IC701 ?
Is there audio signal at
pin 6 of IC701 ?
Check circuit around of J8001.
TROUBLESHOOTING GUIDE
E-25
YES
YES
YES
YES
NO
NO
NO
NO
E-E AUDIO (STEREO)
DOES NOT APPEAR
Is the voltage at pin 5,
15, 36, 46 of IC701 5V ?
Is the voltage at pin
3 of IC701 9V ?
Check POWER BLOCK.
Check POWER BLOCK.
Change IC701.
Is there Audio signal at
pin 11, 14 of IC701 ?
Is there Audio signal at
pin 78, 80 of IC701.
Check circuit around of J8001.
Check J651, J652.
TROUBLESHOOTING GUIDE
E-26
YES
YES
YES
YES
NO
NO
NO
NO
TUNER AUDIO (MONO)
DOES NOT APPEAR.
Does E-E AUDIO
(MONO) appear?
Refer to section "E-E AUDIO
(MONO) DOES NOT APPEAR".
Check circuit around of TU301
at pin 16.
Change IC701.
Check IC8001.
Is there signal at pin
48 of IC701 ?
Is there audio signal at
pin 78, 80 of IC701 ?
Is there audio signal
at pin 41, 44 of IC8001 ?
Check circuit around of J8001.
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