Service manual

Troubleshooting 31
B
FROM SHEET 1
PROT
ANNUNCIATOR
ON?
PRESS PROTECT KEY
"OT"
DISPLAYED?
NO
YES
YES
OUTPUT
VOLTAGE NEAR
OV?
YES
GO TO "OUTPUT HELD HIGH"
TROUBLESHOOTING FIG. 3-6.
PROBABLE DEFECTIVE A10 BOARD
"OV"
DISPLAYED?
NO
YES
GO TO "OV AT TURN-ON"
TROUBLESHOOTING FIG 3-4.
DISPLAYED?
"OC"
YES
NO
NO
CHECK IF OCP IS ENABLED AT
TURN-ON AND CURRENT IS
PROGRAMMED TO ZERO,
OR OUTPUT SHORTED
RI (REMOTE INHIBIT) DISPLAYED.
CHECK FOR SHORT BETWEEN
A2TB101-3 AND GROUND.
C
FROM SHEET 2
GO TO "OUTPUT HELD LOW"
TROUBLESHOOTING FIG. 3-5
VOLT-
AGE RIGHT BUT
OUTSIDE SPEC?
YES
PROBABLE DEFECTIVE A10 BOARD
NO
NO
Figure 3-1. Overall Troubleshooting (Sheet 4 of 4)