Sharp LC-32P50E Service Manual page 34

LC-26P50E
LC-32P50E
LC-37P50E
TROUBLE SHOOTING TABLE
No audio output from the
headphones
Is there audio output on pins
(2) and (3) of the headphone
terminal (J1203)?
NO
Is audio input/output signal of
pins (3) and (5)/(1) and (7) of
I 2506 (HP-AMP) normal?
NO
Is audio output signal (HP-OUT)
properly sent from pins (25) and
(24) of I 2501 (MSP)?
NO
heck audio input signal of pin (67) of I 2501 (MSP); pins (65)
and (39) of the power line; pins (2) and (3) of I2 -LINE; and
peripheral circuits.
o sound (3) (output to external devices)
No audio output from
S ART-1 (EXT-1)
onfirmation of the settings:
1) Is the MUTE button on the remote control set to ON? ¥¥¥ Set to OFF.
2) heck the connection to external devices. ¥¥¥ Is there any improper connection?
Is audio signal sent to pins
NO
(3) and (1) of S ART-1
(S 1201)?
YES
heck the connection to
S ART-1 (S 1201) and
external devices.
Is S1-MUTE signal at H?
(Q1203/Q1204)
NO
Is audio signal sent from pins
NO
(37) and (36) of I 2501?
YES
heck the audio signal
output line from pins (37)
and (36) of I 2501 to pins
(3) and (1) of EXT1.
(Continued)
No audio output from
S ART-2 (EXT-2)
Is audio signal sent to pins
NO
(3) and (1) of S ART-2
(S 1200)?
YES
heck the connection to
S ART-2 (S 1200) and
external devices.
heck the power supply 5/8
V pins (65) and (39) of
I 2501 and peripheral
circuits.
36
No audio output from EXT-3
Is audio signal sent to pins
NO
(4) and (3) of EXT-3 external
connector (J1201)?
YES
heck the connection to
EXT-3 (J1201) and external
devices.
Are S2-MUTE signal and A-
MUTES signal at H?
(Q1200/01, Q1206/07)
NO
Is audio signal sent from pins
NO
(34) and (33) of I 2501?
YES
heck the audio signal output
line from pins (34) and (33) of
I 2501 to Q1215/Q1216.