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XL-T300 (serv.man13). Block diagram - Sharp Audio Service Manual (repair manual). Page 3

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– 23 –
XL-T300H
Figure 23 BLOCK DIAGRAM (3/3)
VOLTAGE
REGULATOR
1
3
3 
2 
1 
AC INPUT
SOCKET
AC230V,50Hz 
AC 230V,50Hz 
AC POWER SUPPLY CORD
LINE
FILTER
POWER
TRANSFORMER
(SUB) 
CNP681
SO651 
LF651 
IC681
AN78L05
CONSTANT 
RLY601
T681
D681~D684
Q683
1
2
3
4
1
2
3
4
5
5
1
3 2 
2 
POWER
TRANSFORMER
(MAIN)  
TF
T651
T1.25A  L 250V
CNP651
F653
T3.15A  L 250V
F652
T3.15A  L 250V
F651
Q604
Q605
D657~D660
D651~D654
Q801
Q201
Q202
Q881
Q882
Q891
Q207
RLY201
Q603
Q601
Q602
Q606
Q607
CD +B
+B
CD_6.8V 
+B1
+B2
+B3
+B4
M_12V 
A_12V
15
13
8
1
IN1
GND
VCC
10 11
+VE1
–VE1
+VE2
–VE2
7
6
IN2
+B
+B
POWER AMP.
IC601
STK40202
L-CH
R-CH
L-CH
R-CH
SPEAKER TERMINAL
+ 
+ 
SO601 
HEADPHONES
1 
2 
3 
4 
5 
9 
10
JK601
VSS 
VDD
IC401 
LC75342M
15
14
13
12
11
10
9 
17
18
19
20
21
22
23
24 
25
26
27
28
29
16
8 
7 
6 
5 
4 3 2 1 
CE
DI
30
CL
LOGIC 
TUN  L 
CD  L
TUN  R
R-CH OUT
R-CH OUT
L-CH OUT
R-CH IN
L-CH IN
L-CH OUT
A_12V
NC
FUNCTION/VOLUME
EQUALISER
AUX  R
AUX  L
TAPE  L
CD  R
RMINAL
PWB
SWITCHING
MUTE
VOLTAGE
REGULATOR
+B6
CH 
CH 
1
O/AUX
T
+B5
A
C
B
F
E
+B5
AL
D_GND 
MAIN PWB
+B4
+B2
+B
Q461
Q463
+B6
Q241
Q242
Q203
Q204
Q883
Q884
CD_L
CD_R
14 13 12 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
1 
12 
11 
10 
9 
8 
7 
5 6 
4 
2 3 
13 
P_MUTE
CD  +B
CL
DI
CE
DO
FM  ST
SD
VSM
DATA
RDS  CLK
A_GND
TUN  R
TUN  L
D_GND
A_12V
RDS  CLK
RDS  DATA
DO
FM  ST
SD
DI
CL
CE
VSM
D_GND
SURROUND
FROM
TUNER PWB
FROM
DISPLAY PWB
5 6 7 8 
4 3 2 1 
SURROUND
CONTROL
2
1
2
1
FROM
DISPLAY PWB
1 2 3 
USWD_5.6V
P_CONT
D_GND
FROM
DISPLAY PWB
1 2 3 4 5 6 7 
AMP-DET
SP-PLY
PROTECT
FAN-DET
FAN_CONT
M_12V
M 
KIA4558P
CNP301
CNP702
IC201
M802
FAN
MOTOR
CNP701
CNP705
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