Honeywell Chadwick-Helmuth 8500C+ - Figure 5-12. Troubleshooting Flowchart: 8500 Pilot Light

5-42 Chadwick-Helmuth A Business Unit of Honeywell International, Inc.
Chapter 5 - Maintenance And Repair
Figure 5-12. Troubleshooting Flowchart: 8500 Pilot Light
DISCONNECT P2
FROM P/S BOARD
A3
RECONNECT P2 &
DISCONNECT P3
FROM DIGITAL
BOARD A1
RECONNECT P3 &
REMOVE ANALOG
BOARD A2
YES
NO
RECONNECT P3 &
DISCONNECT P4
FROM DIST. BOARD
A5
YES
NO
YES
DISCONNECT P3 ON
PRINTER BOARD
NO
YES
REMOVE POWER
CONNECTOR FROM
DISK DRIVE
YES
REPLACE DISK
DRIVE
RETURN 8500C TO
FACTORY FOR
REPAIR
NO
NO
8500C PILOT LIGHT NOT ON:
FILENAME: FLOWCHTA.DRW
REPLACE P/S
BOARD A3
PILOT LIGHT ON?
PILOT LIGHT ON?
PILOT LIGHT ON?
PILOT LIGHT ON?
PILOT LIGHT ON?
PILOT LIGHT ON?
RECONNECT P4 &
REMOVE ANALOG
BOARD A2
REPLACE ANALOG
BOARD A2
REPLACE PRINTER
ASSY.
YES
NO
REPLACE DIGITAL
BOARD A1
NOTE: THIS FLOWCHART ASSUMES THAT FUSES AND
HARNESS ASSEMBLIES HAVE ALREADY BEEN CHECKED.