Service manual

PN 4237242C
7.5-1
TROUBLESHOOTING
TROUBLESHOOTING POWER-UP PROBLEMS
7
7.5 TROUBLESHOOTING POWER-UP PROBLEMS
The flowchart in Figure 7.5-1can help you troubleshoot when the instrument does not reach
the Main Menu on power up.
Figure 7.5-1 Power-Up Troubleshooting Flowchart (part 1 of 2)
TURN POWER
ON
LCD DISPLAYS
TWO SOLID
BARS
URA
CARD
FAIL
PASS
CPU
POWER ON
SELF-TEST
POWER TO
MOTHERBOARD:
CPU BOOTS
POST BEEP
CODES:
APPENDIX TABLE
C.3
SINGLE BEEP:
END OF POST
BEEP
FLOPPY DRIVE
LED
COMES ON
PASS
BOOTS
FROM FLOPPY
DRIVE LOADS 1st OF
2 SYS PRO-
GRAMS
FLOPPY DRIVE
LED MAY
FLASH ON/OFF
GOOD LOAD:
MAIN
PROGRAM
RUNS
CLEARS
LCD
PASS
LOADS
MAIN SYSTEM
PROGRAM
PASS
LOADS
ERROR AND
MESSAGE
TABLES
COPYRIGHT
MESSAGE
TURNS ON
LINEAR PS &
SUPPLIES
AC FOR +24 V
FAIL
FAIL
FAIL
PROBLEM WITH
DRIVE, DISKETTE
OR
PROGRAM
LOCKS UP IN
CURRENT STATE
+12 V
+5 V
+5 V
+12 V TO K1 ON
AC POWER/
VACUUM
RELAY CARD
A
7242047A
C