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TM 11-5820-890-30-5
14-9. OPERATIONAL CHECK. Continued
Step 9. POWER SUPPLY OUTPUT CHECK. Continued
Action
k. Set Scope CH 1 to AC.
TEST EQPT SELECTOR:
Read Scope.
RESPONSE: 4
Read Scope.
RESPONSE: 5
Read Scope.
l. TEST EQPT SELECTOR:
RESPONSE: 1
m. Set LOAD: 1
n.
o.
SCOPE
DMM.
TEST EQPT INPUT: EXT.
Use ext probe to check TP9.
Set
LOAD:
OFF
CB1:
OFF
13 V: ON
TEST EQPT INPUT:
RESPONSE: 4
INT
Step 10. REMOTE CONTROL CIRCUIT CHECK.
Action
a. Set
13 V: OFF
CAL:
FCTN GEN
FREQ:
LEVEL:
FCTN :
CAL: OFF
RESPONSE:
RESP SEL:
40 kHz (38 to 42 kHz)
500 mV p-p (450 to 550
mV p-p)
SINE
11
S1
TEST EQPT SELECTOR: SCOPE
Read Scope.
Response
k.
l.
m.
n.
o.
Each response position should have
less than 200 mV p-p. If the ripple
voltage is greater than 200 mV p-p,
heat sink assembly (8A1) is bad.
DMM reads 12.3 to 13.7 V dc. If not,
wire from 8A2CR3-C to 8A2J2-F,
or 8A2J2, is bad.
DMM reads -1 to +3 V dc.
If not, 8A2CR3 is bad.
DMM reads 12.3 to 13.7 V dc.
If not, go to chart 9.
DMM reads -1 to +3 V dc.
If not, 8A2CR4 is bad.
Response
a. Scope CH 1 reads 300 to 625 mV p-p.
If not, go to chart 10.
14-6
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