Sharp SF-1014 Service Manual page 112

(10) Copy lamp control section
The change in the copy lamp exposure level is adjusted by changing
the ON period duty of the output pulse (CLPUM) from the CPU and
controlling the copy lamp voltage. Fig. 1 and Fig. 2 show the circuit
diagram and the waveform.
V1
FW
1-7C
V2
R165
15kF
R166
15kF
Q107
CLPWM
2-4C
DTC114YK
5V1
R202
4.7kJ
C133
/CLPWM
2-7C
0.047µF
V4
R160
47kJ
R161
C131
10kJ
0.01µF
D103
IC111C
10 1SS133
R167
8
9
15kF
C107
1µF 50V
24V
R171
3kJ
10
13
11
IC112D
LM339
ZD103
HZS7A1
V5
T.P
R173
1kJ
D102
1SS133
5V2
1 1
Ra6 Ra7
10KJ 10KJ
IC112B
5 4
7
1
6
LM339
C132
R163
1000PF
2.2kJ
V3'
T.P
R169
200kF
R168
R170
16kF
82kF
24V
T.P
T.P
R174
1kJ
Q108
2SC2411K
R175
10kJ
DTC115KKA
Qb1
12 – 9
FWS
2-4C
V3
CLV 2-4B
ZD106
HZS5B3
Q109
DTA114YK
R105
2.2kJ 1/2W
5V2
Rb1 47KJ
Rb1
10KJ Rb2
100J
Qb1
Qb2
0.1µF
DTC124GK
CL
I-15
Qb3
2SD1383K