Sharp LC-20S5E-BK Service Manual page 43

A B
8
7
6
FROM/TO SCALER
C321
SP_AUDIO_OUT_R
25V 10 KA
C322
SP_AUDIO_OUT_L
25V 10 KA
5
AUDIO_MUTE
FROM/TO POWER1
4
SOUND+B
SOUND_GND
AT+3.3V
POWER_FAIL
GND
FROM/TO SCALER
REMOCON
SYS_POWER_H
STANDBY_LED
3
FROM/TO REGULATOR
P.CON+5V
AT+5V
2
CAUTION ATTENTION
1 :SINCE THESE PARTS MARKED BY ARE
CRITICAL FOR SAFETY,USE ONES
DESCRIBED IN PARTS LIST ONLY
A B
H-9
C
SOUND AMP
IC302 LA42052-E
1 2 3
6.8 2.2
0
W867
C315 C316
0.0047 0.0047
B
R310
6.8K
R316
1K
7
R314
1K
2.4
8
R305 3.0 SW
MUTE SW.
Q302
Q301
33K KTC3875S_Y_RTK
KTC3875S_Y_RTK
0
2.9 2.4
R306
R307 3.0 SW
Q303
0
47K1/4W
33K KTC3875S_Y_RTK
0
0
W879
3.3
SW
0
Q300
KRA102SRTK
W878
3.3
0 SW
R300 Q304
3.3
KTA1504S_Y_RTK
1K
0
R4327
3301/4W
SW
5.0 SW
Q4305
Q4308
KRA102SRTK
KRA102SRTK
3.3
0
5.0
3.3
SW
Q4309
3.3
KRC102SRTK
0
:LES PIECES REPAREES PAR UN ETANT NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
DANGEREUSES AN POINT DE VUE SECURITE OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
N'UTILISER QUE CELLS DECRITES
DANS LA NOMENCLATURE DES PIECES
C
D E
SOUND AMP SCHEMATIC DIAGRAM
(MAIN PCB)
4 5 6 7 8 9 10 11 12 13
0 0
2.2 0 0 14.0 0
9.7 14.0 14.0
R318
1.8K 1/4W
R320
1.8K 1/4W R319
R321 2.2K 1/4W
2.2K 1/4W
W868
B
HS301
763WAA0370
R4335 B4318
B4307 HCB1608KF-181T20
330 1/4W
HCB1608KF-181T20 B4309
5.0 HCB1608KF-181T20
D4305
B4306
0
HCB1608KF-181T20 MA111
0
SW
Q4310
3.3
KRC102SRTK
0
NOTE:THE DC VOLTAGE AT EACH PART WAS MEASURED
WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST
WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.
D E
F G
FINAL LINE S/SKD
FROM/TO AV JACK/SWITCH
CD302 (CP302)
CU144401
1
2
3
4
FROM/TO AV JACK/SWITCH
SOUND_GND
SOUND_L
SOUND_R
FROM/TO OPERATION/REMOCON
(CP2201) CP4301
A2001WV2-6P
POWER ON LED 1
STANDBY LED 2
AT+5V 3
GND 4
REMOCON IN 5
GND 6
CAUTION: DIGITAL TRANSISTOR
W887
CAUTION: DIGITAL TRANSISTOR
F G
H
8
7
SP301
YDP3085-2RN
SPEAKER
(L)
8 OHM 5W
SP302
YDP3085-2RN
SPEAKER
6
5
4
3
2
1
PCBF40
CMF102
H
H-10