TM 55-4920-402-13&P
Table 4-11. DC Cables Resistance Checks
From (+)
I
To ()
I
Resistance
DC Extension cable A3529
Pin A (male end)
Pin A (female end)
Less than 1 ohm
Pin B (male end)
Pin B (female end)
Less than 1 ohm
Shell (male end)
Pin A or B
More than 10 M
Shell (female end)
Pin A of B
More than 10 M
Pin A (male end)
Pin B (male end)
More than 10 M
DC Adapter cable B3140-1
Silver pin (male end)
Pin A (female end)
Less than 1 ohm
Cold pin (male end)
Pin B (female end)
Less than 1 ohm
Shell (male end)
Pin A or B
More than 10 M
Shell (female end)
Pin A or B
More than 10 M
Pin A (female end)
Pin B (female end)
More than 10 M
DC Adapter cable B3140-5
Black clip
Pin A (female end)
Less than 1 ohm
Red clip
Pin B (female end)
Less than 1 ohm
Shell (female end)
Pin A or B
More than 10 M
Pin A (female end)
Pin B (female end)
More than 10 M
DC Adapter Cable B3140-9
Pin A (female end)
Lamp Shell
Less than 1 ohm
Pin B (female end)
Lamp center conductor
Less than 1 ohm
Shell (female end)
Pin A or B
More than 10 M
Pin A (female end)
Pin B (female end)
More than 10 M
4-16. DC Cables. These tests will deterrrdne the opera-
perform additional resistance checks from the circuit card
tional capability of the DC Extension Cable and DC Adap-
to related components.
ter Cables. Refer to figures 4-9 and 4-10 for schematic
diagrams of the DC Extension Cable and DC Adapter Ca-
bles end perform resistance checks in accordance with
table 4-11.
4-17. Signal Simulator. These tests will determine the ope-
rational capability of the Signal Simulator. Refer to figure
4-11 for a schematic diagram of the Signal Simulator and
perform resistance checks in accordance with table 4-12.
4-18. Balancer Wiring Checkout.Refer to figures FO-1
and FO-2 and perform additional resistance checks from
the circuit cards to related components.
4-19. Strobex Wiring Checkout. Refer to figure FO-3 and
Table 4-12. Signal Simulator B4305 Resistance Checks
From (+)
P1-A
P1-A
P1-B
P2-A
P2-B
P2-A
P2-A
P2-B
P2-C
To ()
P1-B
P1 (Shell)
P1 (Shell)
P2-B
P2-C
P2-C
P2 (Shell)
P2 (Shell)
P2 (Shell)
Resistance
300 to 360 ohms
300 to 360 ohms
Less than 1 ohm
50 to 56 k
2.0 to 2.4 k
50 to 56 k
50 to 56 k
2.0 to 2.4 k
Less than 1 ohm
Section III. REPAIR PROCEDURES
4-20. Removal and Disassembly. The complete disassem-
disassembly procedures in the following paragraphs. Dis-
bly of VIBREX components; i.e., circuit cards, transfor-
assemble only to extent necessary to accomplish repairs.
mers, switches, etc., is not authorized at this maintenance
4-21. Disassembly of Balancer. Disassembly instructions
level. After performing the troubleshooting procedures
consist of removal and replacement of the meter. Re-
in paragrapha 4-10 through 4-19, perform the removal and
move the meter as follows (fig. 4-12):
4-13