Sharp SF-1118 Service Manual download (Page 4 of 124)

Manual type:Service Manual
Pages:124
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Page 4 of 124
[10]
SERVICING AT MEMORY TROUBLE
AND MAIN CONTROL PWB
REPLACEMENT
. . . . . . . . . . . . . . . . . . . . . . . 10-1
1.
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
2.
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
3.
Remedies
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
4.
Set value recording sheet . . . . . . . . . . . . . . . . 10-3
5.
Memory simulation list . . . . . . . . . . . . . . . . . . . 10-4
[11] MAINTENANCE
. . . . . . . . . . . . . . . . . . . . . . . 11-1
1.
Maintenance cycle and maintenance items
. . 11-1
[12]
ELECTRICAL SECTION
. . . . . . . . . . . . . . 12-1
1.
System block diagram . . . . . . . . . . . . . . . . . . . 12-1
2.
Main circuit
. . . . . . . . . . . . . . . . . . . . . . . . . . . 12-3
(1)
Block diagram . . . . . . . . . . . . . . . . . . . . . 12-3
(2)
CPU (IC6) SC3041K12F . . . . . . . . . . . . . 12-4
(3)
Detector circuit of sensor signal . . . . . . . 12-8
(4)
Start/stop control circuit
. . . . . . . . . . . . . 12-8
(5)
Heater lamp control circuit
. . . . . . . . . . . 12-9
(6)
Driver circuit (Solenoid, electromagnetic
clutch) . . . . . . . . . . . . . . . . . . . . . . . . . . 12-10
(7)
Stepping motor drive circuit
. . . . . . . . . 12-10
(8)
AE (Auto Exposure) sensor circuit . . . . 12-11
(9)
Toner supply motor drive circuit . . . . . . 12-11
(10)
Reset IC (IC13) . . . . . . . . . . . . . . . . . . . 12-11
(11)
Operation panel
. . . . . . . . . . . . . . . . . . 12-12
(12)
EnergyStar circuit description . . . . . . . .
12-13
Sample
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