DPP-FP50 - Sony Other Service Manuals Service Manual (repair manual). Page 8

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5. When the printing is completed, press the [CANCEL]  button.

When the initial screen of the service mode is displayed, turn
off the power.
Keep the printed output produced in step 4 as the reference.

6. Replace the thermal printer or the main board.

(Refer to Section 6.)

7. Turn on the power of this unit.
8. Perform the steps 1 to 4 again to print the test pattern (17 step).
9. Compare the test pattern printed in step 8 with the test pattern

printed (reference test pattern) in step 4.
Compare the density in each step from the leftmost black pattern
to the rightmost black pattern. If the density in each step is the
same level, there is no problem.
• hen the test pattern in step 8 is darker than the test pattern

(reference) in step 4:
Slightly rotate the adjustment volume (RV201) on the main
board clockwise. Print the test pattern again and check the
density.

• When the test pattern in step 8 is lighter than the test pattern

(reference) in step 4:
Slightly rotate the adjustment volume (RV201) on the main
board counterclockwise. Print the test pattern again and check
the density.

Perform the above until the same level density can be obtained.

10. Press the [CANCEL] button.

Turn off the power when the initial screen of the service mode
is displayed.

1. Start the service mode. (Refer to Section 2-1.)
2. Select "Video Out Level" using the [ARROW] buttons and press

the [ENTER] button.
The following screen is displayed.

Video output check:
Check the color monitor screen.

LCD check:
All items are displayed on the LCD.
Adjust the contrast of LCD using the [ARROW] buttons (f, F).
f: heighten the contrast
F: lower the contrast