Covidien WarmTouch, Service Manual

Page: 80 / 314

Troubleshooting
6-10 Service Manual
Display not working
•
Make sure that the On/Standby key has been pressed and the
status LED is green. (If the status LED is amber, the display is
blank.)
•
Check the display cable connection to the UI PCBA ( page 10-8 ).
•
Try replacing components in the following order:
1. Display (
page 10-8 ).
2. UI PCBA ( page 10-12 ).
Display test failure
(bad pixels or incorrect colors)
•
Check the display cable connection to the UI PCBA ( page 10-8 ).
•
Try replacing components in the following order:
1. Display (
page 10-8 ).
2. UI PCBA ( page 10-12 ).
Key(s) not working on keypad
or
Keypad test failure
•
Check the keypad cable connection to the UI PCBA ( page 10-3 ).
•
Try replacing components in the following order:
1. UI PCBA (
page 10-12 ).
2. Keypad ( page 10-3 ).
Speaker not working
•
Check the speaker cable connection to the power PCBA and to
the two terminals on the speaker. Make sure the wires are on
the correct terminals (red to positive; black to negative)
(
page 10-40 ).
•
Try replacing components in the following order:
1. Speaker cable (
page 10-40 ).
2. Speaker ( page 10-37 ).
3. Power PCBA ( page 10-31 ).
Fan not operating
•
Check the error codes on the System Information screen
(
page 1-9 ), and perform recommended corrective actions
( page B-1 ).
•
Check the fan cable connection to the power PCBA
(
page 10-31 ).
•
Try replacing components in the following order:
1. Fan (
page 11-33 ).
2. Power PCBA ( page 10-31 ).
Flow test failure
(fan speed out of range)
•
Check the fan cable connection to the power PCBA
(
page 10-31 ).
•
Try replacing components in the following order:
1. Power PCBA (
page 10-31 ).
2. Fan ( page 11-33 ).
Table 6-1. Warming Unit Problems and Resolutions (Continued)
Problem Resolution