6/02
2-107
DC1632/2240
7-250
Status Indicator RAPs
Prelaunch Training/Review
7-250 Tray Communication
Communication fault between Tray Module PWB and MCU PWB.
Procedure
There is +5 VDC measured at P/J541-9 on the Tray Module PWB (PL 15.9).
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Check the wires and connectors. If the check is OK, replace the MCU PWB (PL 13.1).
If the problem continues, replace the I/F PWB (PL 13.1)
CAUTION
ESS PWB and MCU PWB cannot be replaced at the same time.
Check the wires and connectors. If the check is OK, replace the Tray Module PWB (PL 15.9).
If the problem continues, replace the MCU PWB (PL 13.1).
If the problem continues, replace the ESS PWB (PL13.1).
Figure 1 Tray Communication
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