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DE VOLTS
I
CHECK POWER
HJPPLIES
1
SELECT 200
mV DC
RANGE.
DISPLAY RESPOND
TO CHANGES iN
INPUT VOLTAGE
Yes
1
SHC
7
CHECK CLOCK U1301,
U1303, AMD
DISPLAY
CIRCUIT.
DISCONNECT ONE END
OF R1424 TO SEE IF
U132f OR Cat421 OR
CR1422
LEAKAGE
I S
CAUSING
OFFSET.
1
3
DISCONMECT
CR1112
AUTO
ZERO ClRCUlT
AMD
CR1113
-
Yes
BE ZEROED
='
A
II
AND CR1113
TO SEE IF
LEAKAGE I S CAUSING
Yes
OFFSET.
-
RECONNECT
R1424
AND
DISCONNECT
CR1421 AND CR1422
Yes
-
REPLACE
GRIT12
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