Nothing Appears On The Camera And Computer Screen (All Black) - Epson Photo PC-750Z Service Manual

PhotoPC-750Z
3.1.4 Image is taken out of cross mark in the
viewfinder (Not using LCD monitor)
Here shows checkpoints and solution when the images are taken out of
central cross mark when using the lens viewfinder. See the table below.
Table 3-8. Image is taken out of cross mark in the viewfinder
No. Checkpoints
Is the user trying to take a picture
1 within 80cm to the subject without
using Macro mode?
Are 3 fixing screws for lens viewfinder
unit and lens unit removed?
2
(Removing these 3 screws is
prohibited)
Is the CCD soldering on the CA1 board
performed correctly? Especially, the
lens unit determines the position when
3
soldering, perform soldering by
covering the lens unit without soldering
only the CCD.
Troubleshooting
Solution
Advise the user to use Macro
mode.
Replace the whole lens unit.
Re-solder the CCD correctly.
Overview
3.1.5 Nothing appears on the Camera and Computer
screen (All black)
This section shows check points and solution when no images appears
on the LCD even in the playback mode, or the PC monitor is all black
after transferring the image data to the PC. When this symptom occurs,
it will be no images even after changing the LCD switch to View mode.
Camera may work fine even when the CCD is broken
and unable to read images. From the repairing
experiences of PhotoPC 500, main control board
(corresponding to CA2 board in case of PhotoPC-
750Z) is found defective from the abnormal symptoms
related to CCD. Even when the LCD monitor is not all
black but if red or green are strong, there is a high
possibility that AWB adjustment values are abnormal.
Table 3-9. Nothing appears on the Camera and PC screen
No. Checkpoints
1 Is CA2 board defective?
2 Is CA1 board defective?
3 Is CCD defective?
If color is obviously abnormal, perform 5100K AWB adjustment again. At
this time, follow the cautions below when using the Color Viewer.
*Avoid entering any lights. *Keep the distance between the Color Viewer
4
and lens within 1cm. (It is OK to let them attach each other) *Set the
volume of Color Viewer to the maximum, and wait about 10 minutes after
turning the Color Viewer On in order to settle the brightness.
Revision A
Solution
Replace the CA2 board.
Replace the CA1 board.
Replace the CCD.
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