Positions For Measuring And Adjusting On The Pw1 Board - Epson PhotoPC 800 Service Manual

EPSON PhotoPC 800
5.2.2 Positions for measuring and adjusting on the
PW1 Board
When replacing the PW1 board, it is not necessary to perform this adjustment.
However, it is required to perform this if you replace any parts of PW1 board.
CL530
VR502
VR508
VR503
CL518
CL533
CL536
Figure 5-5. Positions for measuring and adjustment
„
Voltage adjustment is necessary to repair in the PW1
board and replace the parts.
„
Power voltage is set about +3.0 V.
Adjustment
CL532
CL534
CL537
CL523
VR501
Q5008 (C)
VR506
Q5033-4
Q5029-3
VR507
CL512
VR504
VR505
PREPARATION
1. Connect CN104 on the CA2 board and CN502 on the PW1 board with
extension cord.
2. Open the barrier switch.
3. Set the view mode, and turn on the LCD.
4. Carry out initialization and display the through image on the LCD screen.
5.2.2.1 IC501 Oscillation Frequency Adjustment
SETTING
†
Measuring Point:
†
Measuring Equipment: Frequency counter
†
ADJ.Location:
†
ADJ. Value:
†
Dial switch:
ADJUSTMENT METHOD
1. Adjust with VR501 to 200
Adjustment
CL512
VR501
±
200 1 kHz
LCD shooting mode
±
1 kHz
Revision A
79