M4735A Service Manual 3-27
Operational Problems
3
Display
The following table covers problems that may arise with the display.
NOTE Before replacing any parts, check to see if the cables and flex circuits are
properly connected. See "Servicing Notes" on page 4-1.
Fails Printer Test in Diagnostic
Mode (other then symptoms above).
Printer failure. Replace Printer.
Control PCA failure. Replace Control PCA.
Table 3-11 Operational Problems - Printer (Continued)
Symptom Possible Causes Suggested solution
Table 3-12 Operational Problems - Display
Symptom Possible Causes Suggested solution
No response - all light or all dark. Control PCA failure. Replace Control PCA.
Display failure. Replace Display.
Fails Display Test in Diagnostic
Mode (display problem other then
symptoms above).
Display failure. Replace Display.
Control PCA failure. Replace Control PCA.
Fails Display Test in Diagnostic
Mode (indicator LEDs).
Control PCA failure. Replace Control PCA.
Pacer Keypad or Main Keypad
failure.
Replace Pacer Keypad or Bezel
Assembly.
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