Sharp Z-810 Service Manual page 86

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(10) Copy lamp control section
The output of transformer T301 in the AC PWB described later is
monitored by the CPU to detect the variation in the AC power voltage,
controlling the phase of copy lamp applying voltage and maintaining
the voltage at a constant level.
The variation in the copy lamp exposure amount is adjusted by
changing the time from the zero-cross point ((a) in Fig. 2) to V4 rising
edge (b) to control the copy lamp voltage.
PWB
T301
V1
FW
R106
15KF
(100V series)
2KF
(200V series)
R117
18KF
(100V series)
30KF
(200V series)
Q204
CLPWM
DTC114EK
5V
R285
4.7KJ
CLPWM
V4
BD101
S1NB60
BD102
R101
2.0KJ
R228
30KF
V2
IC202
NJM2901M
1SS133
10
+
8
9
-
C248
R286
0.047µF
1KJ
Published in Heiloo, Holland.
FW
IC111
7805
1 3
VI VO
GND
2
C111
2200µF
35V
S1NB60
5V2
R226
10K
4
+
5
-
C115
0.01µF
R227
2.2KF
R105
C102
R104
0.47µF
50V
V5
R287
1KJ
R284
D143
10KJ
1SS133
12 – 9
C107 C234
ZD105
47µF 22000pF
TMPG06-7.5A
10V 50V
R234
15KJ
IC202
NJM2901M
2
C218
22000pF
V3
V3'
R103
R102
Q215
DTA143ZKA
R116
200J
1/2W
Q216
2SC2411K
1/11/16
5V
FWS
CLV
CL