Sharp SMO1854DS

25
PRINTED CIRCUIT BOARD
1. CIRCUIT CHECK PROCEDURE
1. Voltage Check
- Key check point
- Check method
NO MEASURE POINT WAVE FORM REMEDY REMARK
1 MP1 DC 5V±0.25V Replace VL1, C25, EC7,D29 NO LOAD
2 MP2 DC 15V±3.0V
Replace T1, D28, EC5, EC6, OP2, IC6,
R71~R74, R80, R83
NO LOAD
NOTE
Each measure point must be measured with GND points.
NO CHECK POINT REMARK
1 IC1 PIN 5 5VDC
2 IC1 PIN 8
3 IC1 PIN 35 OR PIN 36
T
T
T : 16.67ms(60Hz)
5V
0V
T
T
T : 250ns(4MHz)
5V
0V