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TM 55-4920-412-13&P
NOTE
Remove Keying Plug from circuit
boards before inserting extender
board in assembly connector (Plugs
in each circuit board). Be sure to
reinstall
Keying
Plugs
AFTER
maintenance has been completed.
CAUTION
Place
simulator
INPUT
POWER
switch
OFF
before
removing
or
installing printed circuit boards and
connections.
4-12. Troubleshooting and Repair (ATST).
a.
General. This paragraph contains general repair
information, maintenance instructions, troubleshooting
procedures and component replacement procedures.
Test equipment and accessories required are listed in
Tables 4-3 and 4-4. VIDSB Test Set circuit schematics
are shown in FO-1 through FO-16. Refer to Figure 4-1
for power supply-equipment set up.
Table 4-3. Test Equipment
Common Name
Manufacturer and Model (Part Number) or (Equivalent)
AUTOTRANSFORMER
General Radio, Model W10MT3AS3 (7910809)
DC POWER SUPPLY
NJE, Model CS36CR30D2 (7907346-2)
DIGITAL MULTIMETER1 (DMM)
Hewlett-Packard, Model 3478A
FREQUENCY COUNTER
Hewlett-Packard, Model 5345A (MIS-28754/l, Type 1)
OSCILLOSCOPE
Tektronix, Type R5440 (MIS-28706/1 Type 1) w/5A48 (MIS-28706/3) and
5B42 (MIS-28706/4)
PRECISION OSCILLATOR
Krohn-Hite,. Model 4100AR-8 (7915951) w/7500 (7500)
POWER SUPPLY
Tektronic, PS 503A
Table 4-4. Accessories Required
Common Name
Manufacturer and Model (Part Number) or (Equivalent)
ADAPTER1
BNC plug to double banana jacks (7907401)
ADAPTER
Single banana jack to pin plug (black) (7907528)
ADAPTER BOX
BAN jack terminations (7916113) (SKD4850-3)
EXTENDER BOARDS2
Canadian Marconi, P/N 220-419916-000
Canadian Marconi, P/N 220-421707-000
Canadian Marconi, P/N 220-412705-000
LEAD
24-in., No. 18; single banana plug terminations (red) (7907497)
LEAD1
24-in., No. 18; single banana plug terminations (black) (7907498)
LEAD3
Pin jack to single banana plug (7921032)
LEAD1
32-in., single banana plug to test hook (red) (7915941-1)
LEAD
2 single banana plug to ac power plug (7907551)
1Two required.
2One each required.
3Five required.
4-4 Change 2
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