TM 11-5820-890-30-4
13-9. OPERATIONAL CHECK. Continued
Step 2. POWER SUPPLY OUTPUT CHECK. Continued
Action
k. Set Scope CH 1 to AC.
l.
Set TEST EQPT SELECTOR: SCOPE.
Read Scope.
Set RESPONSE: 4.
Read Scope.
Set RESPONSE: 5.
Read Scope.
Set TEST EQPT SELECTOR: DMM.
Set RESPONSE: 1. Read DMM.
m. Set LOAD: 1.
Set TEST EQPT INPUT: EXT.
Use ext probe to check TP9. Read DMM.
n. Set
Set
Set
Set
o. Set
LOAD: OFF.
CB1 : OFF.
13 V: ON.
TEST EQPT INPUT: INT. Read DMM.
RESPONSE: 4. Read DMM.
Step 3. REMOTE CONTROL CIRCUIT CHECK.
Action
a. Set 13 V: OFF
Set CAL: FCTN GEN.
FREQ: 40 kHz (38 to 42 kHz)
LEVEL: 500 mV p-p (450 to 550 mV p-p)
Set FCTN: SINE.
Set CAL: OFF.
Set RESPONSE: 11.
Set RESP SEL: S1.
Set 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,
the heat sink assembly (8A1) is bad.
DMM reads 12.3 to 13.7 V dc. If not,
the wire from 8A2CR3-C to 8A2J2-F,
or connector 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.
13-6
