Section 6 Troubleshooting - Olympus OEP-3 Service Manual

6-1. Video (Image) Related Trouble
The flow of a video signal in UP-50 series is shown in the figure below.
Input block
VPR-63
PRT-13
Print output block
The flow of a video signal can be mainly classified into input, monitor output, and print output blocks.
The block in which a trouble occurs can be supposed from the trouble state.
1. Both the print result and monitor display are abnormal.
In this trouble state, a trouble occurs in the input block.
2. The print result is normal and the monitor display is abnormal.
In this trouble state, a trouble occurs in the monitor output block.
3. The print result is abnormal and the monitor display is normal.
In this trouble state, a trouble occurs in the print output block.
Each block is described below.
For more details, refer to the block diagram, schematic diagram, and circuit operation description of each
board.
OEP-3 V1 (UC)
Section 6
Troubleshooting
[Flow of video signal]
SG
VIDEO.S-VIDEO.RGB
IF-764
VIDEO.S-VIDEO.RGB
DECODER
Digital RGB
DRAM
A/D
Tset Pattern
MASKING
8bit DATA(Serial)
HEAD DRIVER
8bit DATA(Parallel)
THERMAL HEAD
PRINTS
Monitor output block
MONITOR
RELAY
Control
ENCODER
Control
SY-282
Control
6-1