Main Power Supply Troubleshooting Flow Chart - GE LOGIQ E9 Service Manual

D 5180483-100, R
IRECTION
7-9-4-4

Main Power Supply Troubleshooting Flow Chart

Use the Flow Chart and Troubleshooting Flow Chart Procedures to isolate cause/failure(s).
START
Simulator Mode
1. Power-down and wait for ON/OFF Button LED to turn from amber
to OFF. Always wait for amber light to be completely OFF.
2. Remove all cards from Card Rack, Card Rack Fan Tray and 4DMC
board from Main Power Supply (Main PS).
3. Inspect Backplane pins. Make sure none are broken or bent.
4. Power-up and locate Pin 3 of the Test Connector on BEP (will be
referred to as TC-3). To locate the Test Connector and pin-out,
see label on BEP door. TC-3 is connected to 24V of the
Backplane.
5. Measure the voltage at TC-3.
Go to "Power Supply 24V Out Test."
Pass
No short
found
Go to "Short
Circuit Test."
Short found.
Faulty parts
replaced.
24V @ TC-3
PROPRIETARY TO GE
. 7
EV
Figure 7-160 Main Power Supply Troubleshooting Flow Chart
No 24V
No 24V @ TC-3
Fail
Replace PS
Replace PS and
Backplane.
Go to "New PS and
Backplane Test
Procedure."
Fail
1. Contact Support.
2. Return unneeded new parts.
Chapter 7 Diagnostics/Troubleshooting
LOGIQ E9 P
Yes 24V @
1. Power-down and wait for ON/OFF Button to turn OFF.
TC-3
2. Install GFI Card. Observe power LEDs on GFI.
3. Measure voltage at TC-3.
No 24V @ TC-3,
No LED on GFI
Replace GFI
Go to "Remaining Parts Procedure."
Procedure
complete.
Power-down.
Pass
Install all removed parts.
Power-up.
Check for Simulator Mode.
S
ROPRIETARY ERVICE
Yes 24V @
TC-3,
Yes LED
on GFI
No Simulator
Finished.
Mode
Go to START.
Still
Simulator Mode
M
ANUAL
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