Sharp SX80J9, Руководство по обслуживанию

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17
SX80J9
17-2 17-1
No Yes
Yes No
Is there audio
signal at pin
(29), (31) of
IC451?
Check IC451
and its
peripheral
circuit.
Check IC201,
NICAM unit,
tuner and its
peripheral
Set the sound
system in
position.
If problem,
check IC201
and its
peripheral
circuits.
NO NORMAL SOUND
Circuits to be checked:
• Sound control circuit.
• Sound out circuit.
• SIF circuit.
• S-convertor.
Is audio output terminal J451
normal.
Yes
Yes No
No
Check TV sound.
Is there audio signal at pins (6), (7) of
IC303?
Change the sound system.
Is sound normal?
Check IC301,
IC302, IC303
peripheral
circuit.
Is there audio
signal at pins (1)
of IC1301? Is there audio
signal at pins (2),
(4) of IC1301?
No Yes
Check IC303.
No Yes Yes
Check IC1305
and its
peripheral
circuit. Check IC1304
and its
peripheral
circuit.
No
Check IC1301.
And check
speaker
connector (SA),
(SB) and (SS).
Set Sound-Volume
at maximum. Do
pins (19), (20),(22)
of IC303 work?
No Yes
Yes
Yes
Yes
Yes
No
No
Turn on Colour control. Does
colour appeart?
NO SPECIFIC COLOUR
D
Is only RF signal's colour abnormal?
Set Colour
control.
Turn on Colour system forced
switch. Does colour appear?
Fix cotrol to
coloured
system.
Check Q803,
IC451, IC5461
and their
peripherals.
No
Check D1606
and its
peripherals.
Check
IC801.
Check TU201,
IC201, IC451 and
their peripherals.
Yes
Yes
Yes
No
No
Is chroma input level of IC801
pin (13) proper?
Is FBP signal waveforms at pin
(25) of IC801 proper?
Are signal waveforms at TP801
and TP802 proper?
Are waveforms at pins (29) and
(30) of IC803 proper?
Is SCP signal waveform at pin (2) of
IC801 proper?
No
NO COLOUR
Check IC801
and IC4902.
Check IC803 and
its peripherals.
No
PAL, SECAM,
NTSC4.43:
Check X801, pin
(8) of IC801 and
their peripherals.
NTSC3.58:
Check X802, pin
(10) of IC801 and
their peripherals.
TROUBLE SHOOTING TABLE (Continued) TROUBLE SHOOTING TABLE (Continued)