Zenith ZCM-1490 Service Manual page 62

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a
c:
0-
m
(f)
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g
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co
TURN MONITOR ON.
POWER INDICATOR
LED ON?
NO
CHECK POWER
CORD. OK?
NO
I
REPLACE
I
~
,
YES
~
CHECK OUTPUT VOLTAGES; OK? ALLOW UNIT TO RUN.
~
CHECK FOR THERMAL
PIN OR INTERMITTENT
CONNECTOR 1 Z. ! i 2
§.
BEHAVIOR. REPLACE
POWER SUPPLY AS
3R6 +16 GND GND GND +88
-16
NECESSARY.
3R5 +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. 00 NOT
ATTEMPT TO SERVICE THE POWER SUPPLY.
CHECK POWER
CHECK POWER
CHECK FOR LOOSE
SUPPLY FUSE.
~ YES
CONNECTORS TO
OK?
SWITCH. OK?
~
POWER SUPPLY
lNO
lNO
BOARD.
I
REPLACE
I I
REPLACE
I
CHECK FOR OUTPUT
L-.-
VOlTAGES PER
ABOVE CHART. IF
.. MISSING, REPLACE
POWER SUPPLY.
Figure 6-7. Power Supply Troubleshooting Chart