TM 11-6625-2398-15-3
Step
Test equipment
Equipment under
Test
Performance
No.
control settings
test control settings
procedure
standard
Note.
Consult the schematic diagrams for printed circuit extender boards A3/A4 (fig. 6-21) and A5 (fig. 6-22) to perform step
4. Perform the procedures a, b, c, and d below for boards A3/A4 and test procedures a and b below for board A5.
4
Leave controls and test leads in positions in-
a. Check for short circuit by connect-
a. Meter must indicate
cated in step 2.
ing multimeter test leads to first two
open circuit.
adjacent pins or etched terminals
at one end of the aboard. Move the
two multimeter test leads successively,
by advancing each test had one pin at
a time, across the board. Repeat above
for the etched terminals on the opposite
side of the A3/A4 boards.
b. Meter must read
one multimeter test lead to the pin or
zero ohms (continuity)
etched terminal at one end of the board
for each pin or
and the corresponding pin (A5) or
etched terminal.
connector contact (A3/A4) at the
opposite end of the board.
c. Check for short circuits by connect-
c. Meter must indicate
ing multimeter test leads to etched
open circuit.
terminals directly adjacent on
opposite sides of the A3/A4 boards.
d. Meter must indicate
on A3/A4 boards by connecting one
zero ohms (continuity)
multimeter test lead to the first con-
for each test point.
tact of J45 and the test point (J1 or J2)
immediately below. Advance test
leads successively across the board
to last contact of J45 and the last test
point (J43 or J44). Repeat above
for the opposite side of the board.
5
Leave controls and
Adapter Test MX-
a. Connect one multimeter test lead
a. Meter must indicate
test leads in posi-
8565, TPM-24(V).
to VIDEO jack J1 on front panel.
zero ohms (continuity)
tions indicated in
VIDEO switch to
Successively connect the other test
for each switch position.
step 2.
positions indicated
lead to plug Pi contacts listed below.
In test procedure.
Rotate the VIDEO switch to the position
corresponding to the plug contact below
for each test.
Test lead to:
VIDEO switch
position
P1-R
RETURN (GND)
P1-M
ISLS GATE
P1-N
CHAL VIDEO
P1-C
SUM IF VIDEO
P1-D
DIFF IF VIDEO
P1-P
MOD PULSE
P1-F
RCVR VIDEO
P1-J
CHAL MON DET
INCIDENT PWR
P1-K
CHAL MON DET
REFL PWR
b. VIDEO switch in
b. Connect multimeter test leads to
b. Meter must read
any position.
GND jack J8 on front panel and
zero ohms (continuity).
other lead to contact R of plug P1.
c. Same as b above.
c. Successively connect the multi-
c. Meter must read
meter test leads to the jacks and
zero ohms (continuity)
plug P1 contacts as follows:
for each test.
Test lead to:
VIDEO switch
position
RT FAULT J2
P1-G
LVPS MON J3
P1-E
8-4
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