Lucent Technologies Lineage
®
2000 ECS-6 Controller J85501D-1
7 - 12 Troubleshooting
Issue 6 August 1998
Figure 7-4: Display Is Not Lit
D. DISPLAY IS NOT LIT
SHEET 1 OF 1
1. ARE ANY CONTROLLER
LEDS LIT?
7. HAVE OFFICE ALARMS
BEEN ISSUED?
8. PROBABLE CAUSE:
CONTROL UNIT HAS
LOST POWER.
GO TO PART B.
9. CHECK SEATING OF BBK1B
DISPLAY BOARD ON 113A2
CONTROL UNIT.
10. DOES DISPLAY LIGHT?
11. REPLACE 113A2
CONTROL UNIT.
6. REPLACE 113A2
CONTROL UNIT.
2. IS MNF ALARM
PRESENT?
3. CHECK FOR BLOWN
FUSES ON LVD/FUSE
BOARD AND REPLACE.
12. DOES DISPLAY LIGHT?
GO TO STEP 1
5. DOES DISPLAY LIGHT?
4. CHECK SEATING OF LCD
DISPLAY MODULE ON
BBK1B DISPLAY BOARD
(PART OF 113A2 CONTROL
UNIT). DISASSEMBLE
FACEPLATE OF CONTROL
UNIT IF NECESSARY.
END
END
END
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
NO