TM 9-4935-481-14-1
C4
Table 3-11. DMS-D Performance Test-Continued
Table 3-11. DMS-D Performance Test-Continued
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
103
CIP
Observe INHIB lamp illuminated.
115
HWS
Adjust DC LEVEL control to +3.00 0.001 Vdc.
0
104
DMM
Observe a LO reading.
DMM
(16)
Replace card A9. Check A9 pins 119, 118, 117, 78, 95, 79
116
MCP
SELECTOR A switch to I-23.
and 80.
117
MCP
SELECTOR B switch to H17.
105
OSC
Observe a square wave switching from HI to LO at a 1 second repetition rate.
118
MCP
SELECTOR C switch to E19.
(15)
119
PD
HORIZ/REF/VERT switch to VERT.
CAUTION
CAUTION
Failure to remove the 1W20 cable between J12 and J13 will result in
Avoid grounding jumpers during installation or removal.
damage to DMS circuit components.
120
MCP
Connect adapter 10275938 to J6, and short pins 21 and 33 together using a jumper cable 11154430.
106
MCP
Disconnect cable 1W20 from J12 and J13, and cable from J15.
121
MCP
Connect adapter 10275940 to J8.
Battery Charger/Radiometer Power
122
MCP
Connect a 10215396 cable to J15 and the white probe to pin "V" of the adapter connected to J8.
107
MCP
Set SELECTOR A switch to the positions indicated and observe the DMM reading for each switch
123
DMM
Observe a reading of +2.995 to +3.005 Vdc.
setting.
SELECTOR A
Reading
(17)
108
H21
+23.50 to +25.50 Vdc
124
MCP
Remove the white probe from the J8 adapter.
109
H22
+23.50 to +25.50 Vdc
125
MCP
SELECTOR A switch to F4.
110
H23
+23.50 to +25.50 Vdc
126
ITP
INTERNAL TEST switch to 3.
111
H24
+23.50 to +25.50 Vdc
127
HWS
Adjust RIPPLE control to +3.500 0.001 Vdc.
Replace card A25. Check A25 pins 24, 23, 22, 21 and
DMM
13.
(18)
Ripple Filter and Differential Amplifier
128
MCP
SELECTOR A switch to 1-23.
112
MCP
SELECTOR A switch to F4.
113
PPE
SEQUENCE switch to MNL.
114
PPE
FUNCTION TEST switch to INT-CLK.
3-81