Olympus OEP-3, Service Manual

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6-1
OEP-3 V1 (UC)
Section 6
Troubleshooting
6-1. Video (Image) Related Trouble
The flow of a video signal in UP-50 series is shown in the figure below.
[Flow of video signal]
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.
Input block
Print output block
Monitor output block
IF-764
VPR-63
SG
DECODER
ENCODER
A/D
DRAM
MASKING
THERMAL HEAD
PRINTS
SY-282
RELAY
Digital RGB
8bit DATA(Serial)
8bit DATA(Parallel)
HEAD DRIVER PRT-13
MONITOR
Control
Control
Control
VIDEO . S-VIDEO . RGB
VIDEO . S-VIDEO . RGB
Tset Pattern