TM 55-4920-401-13&P
Table 4-10. Resistance Check Circuit Troubleshooting Table.
Malfunction
Corrective Action
R E S I S T A N C E C H E C K m e t e r
cannot be zeroed.
R E S I S T A N C E C H E C K m e t e r
d o e s n o t d e f l e c t w h e n R E -
S I S T A N C E & A / C I N D I C A T OR
CHECK switch is in any position.
RESISTANCE CHECK meter de-
flects in full clockwise direction in
a l l r e s i s t a n c e p o s i t i o n s o f R E-
S I S T A N C E & A / C I N D I C A T OR
CHECK switch.
Probable Cause
a .
D e f e c t i v e R E -
SISTANCE CHECK meter
a.
D e f e c t i v e R E -
SISTANCE CHECK meter
b. Defective FUNCTION
SELECT switch
c. Defective BAL po-
t e n t i o m e t e r ( R 2 ) o n r e-
s i s t a n c e a n d i n s u l a t i on
check board
a. Defective resistance
check adapter
b. Defective instrument
cable
c. Resistor R3 open on re-
s i s t a n c e a n d i n s u l a t i on
check board.
d. Defective FUNCTION
SELECT switch
a. Replace meter (34, figure
FO-8).
a. Replace meter (34, figure
FO-8).
b. Replace switch 32, figure
(4-37).
c. Replace potentiometer (7,
figure 4-38).
a. Repair or replace adapter
b. Repair or replace cable.
c. Replace resistor (1, fig-
ure 4-38).
d. Replace switch (32, figure 4-
37).
4-12
