Read Sharp TU-32GD1E (serv.man8) Service Manual online
34
TU-32GD1E
TU-37GD1E
TU-37GD1E
TROUBLE SHOOTING TABLE
(Continued)
No audio output (1) (Output from external terminals)
No Head phone sound output.
Are output from Pins (26)(27) of IC2514
(CODEC) and Pins (1)(7) of "HP-R/L-
IN"~IC2502 (HP_AMP) and the Q2501
(HP_MUTE) circuit normal?
Check the Headphone terminal (J2402) and
peripheral circuits.
No audio output from External Speakers.
In the
AUDIO-IF PWB : Is RELA
Y
R
Y6000
normally operated?
In the
AUDIO-IF PWB : Is the "H" signal
coming to "SP-SW" of Pin (1) of SF-
Connector?
In the
A
V
PWB : Is the "H" signal output to
Pin (6) of IC3808?
In the
A
V
PWB : Confirm IC3808 SDA3-
LINE and peripheral circuits.
Is "Selecting speakers" in the MENU-Set
up set to "SPEAKER-B"?
If not, set the "SPEAKER-B".
No audio output from Optical-Audio-OUT
(IC1
109).
YES
YES
YES
YES
YES
YES
NO
NO
NO
YES
YES
Check the "HP-PLUG" signal Line.
Check Pin (4) of Headphone (J2402) thru
Pin (1
1) of IC2509.
Replace IC1
109 or check peripheral circuits.
Check the SPDIF signal from Pin (40) of
MA-Connector (P3802) and Pin (15) of B/B-
Connector (P8903).
Replace IC8903 or check peripheral circuits.
Replace IC8601 or check peripheral circuits.
Replace IC2507 (OPT
-SW) or check
peripheral circuits.
NO
NO
NO
NO
NO
Is output from Optical-Fiber
T
ransmitter
(IC1
109) normal?
Is input into Pin (12) of IC2507 (OPT
-SW)
normal?
In the DVB-T
PWB : Is output from Pin (2) of
IC8903 (INV) coming?
Is output from Pin (AC16) of IC8601
(Processor) normal?
Is output from Pin (8) of IC2507 (OPT
-SW)
normal?
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