Read Sharp SD-EX220 (serv.man2) Service Manual online
SD-EX220H
4 – 3
CNPS01
BIS01
CNS531
CNPS02
ZD402
ZD400
ZD401
TO MAIN SECTION
TO MAIN SECTION
MUTING
Q544
Q543
SP_RELAY
AD_RESET
OFFSET_PROTECT
OFFSET_COMPA
D+5V
QS01
QS08
QS07
QS06
QS02
QS03
QS04
QS05
QS10
QS14
QS13
QS12
QS11
TO 1-BIT AMP. SECTION
SO421
SPEAKER
TERMINAL
FAN_LOCK
FAN_MOTOR
Q422
Q421
Q423
+
-
M
Q424
TO PROTECT CIRCUIT SECTION
+12V
-9V
+4.7V
-5.6V
A_-20V
+5.1V
+3.3V
A_+20V
+7.9V
+9V
IC400
KIA7812AP
VOLTAGE
REGULATOR
IC402
KIA7808AP
VOLTAGE
REGULATOR
IC401
KIA7809AP
VOLTAGE
REGULATOR
Q551
Q552
CNP501
TO DISPLAY SECTION
S_MUTE
SURROUND
SP_RELAY
H/P_R_OUT
H/P_L_OUT
UNIT
TUN_CE
TUN_DI
TUN_CLK
TUN_DO
TUN_L
IC501
LC75341M
AUDIO PROCESSOR
VDD BASS
L_CH
R_CH
R_CH
ÑVCC
+VCC
Q536
Q535
Q550
Q549
Q581
Q538
Q545
Q546
Q539
Q540
Q547
Q548
MUTING
HEADPHONE
SURROUND
ON/OFF
SYSTEM
MUTE
R_CH
L_CH
MUTING
SURROUND
SURROUND
ON/OFF
GND
L
R
L_CH
R_CH
JT501
AUX INPUT
L
R
AUX
TUN_L
TUNER
TUN_R
R
L
CD
IC502
NJM4565M
BUFFER AMP.
+9V
DI CECLK
23
12
6
7
11
24
13
5
4
10
9
16
1
3
8
7
17
14
2
1
21
4
15
6
2
13
3
15
20
5
6 8 9
11
10
6
5
4
3
2
1
1
2
3
4
1
2
3
4
1
2
3
4
3
1
1
1
3
3
2
2
2
+
+
-
-
RL421
BASS
CONTROL
SWITCHING
SWITCHING
A/D RESET
SWITCHING
OFFSET
SWITCHING
OFFSET
SWITCHING
A/D RESET
SWITCHING
A/D RESET
SWITCHING
CURRENT
DETECT
CURRENT
DETECT
CURRENT
DETECT
CURRENT
DETECT
SWITCHING
FAN
SWITCHING
FAN
SWITCHING
FAN
SWITCHING
RELAY
SWITCHING
8
4
3
2
1
5
6
7
MUTING
MUTING
MUTING
DRIVER
-5.6V
+9V
M401
FAN MOTOR
TO 1-BIT AMP.
SECTION
IC503
TJM4558CD
OPE AMP.
JK500
SUBWOOFER
OUT
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