Zenith Z-100 PC series Service Manual page 190

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TURN MONITOR ON.
POWER INDICATOR
LED ON?
NO
YES
CHECK OUTPUT VOLTAGES; OK?
PIN
CONNECTOR 1 2
-
-
3R6 +16 GND
3
-
GND
4
-
GND
5
-
+88
6
-
-16
YES
ALLOW UNIT TO RUN.
CHECK FOR THERMAL
OR INTERMITIENT
BEHAVIOR. REPLACE
POWER SUPPLY AS
NECESSARY.
3RS
+8
GND
+88
-16
-6
NA
3R4 +16
+8
GND
-6 NA NA
3R7 +8
GND NC
NA NA NA
IF VOLTAGES ARE MISSING, REPLACE POWER SUPPLY. DO NOT
ATIEMPTTO SERVICE THE POWER SUPPLY.
CHECK POWER
CORD. OK?
NO
I
REPLACE
I
CHECK POWER
~I
SUPPLY FUSE.
OK?
~NO
REPLACE
I
YES
I
CHECK POWER
~
SWITCH. OK?
r
I
REPLACE
I
CHECK FOR LOOSE
~I
CONNECTORS TO
POWER SUPPLY
BOARD.
CHECK FOR OUTPUT
~I
VOLTAGES PER
ABOVE CHART. IF
MISSING, REPLACE
POWER SUPPLY.
Figure 6·7. Power Supply Troubleshooting Chart
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