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Page Title:
TS Guide 2. VAA DS1 NOT LIT WHEN CB1 IS SET TO ON |
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|  TM 115820890203
TROUBLESHOOTING GUIDES. Continued
3.2.
TS Guide 2. VAA DS1 NOT LIT WHEN CB1 IS SET TO ON
STEPS
CHECKS
ACTIONS
RT display lit?
NO:
2.1
Go to 2.2
Set RT FCTN to SQ ON
YES: Replace VAA DS1
2.2 Set RT FCTN to OFF
N/A
N/A
N/A
N/A
Turn VAA & LS-671 CB1s to OFF
2232 Vdc?
YES: Go to 2.3
Check power source
Veh btry/power is bad
NO:
2.3 Remove VAA from MB
N/A
N/A
N/A
N/A
Remove power cable from MB J1
Measure voltage at power cable,
2232 Vdc?
YES: Go to 2.4
Pin B to Pin A (GND)
NO:
Replace power cable
2.4 Reconnect power cable to MB J1
N/A
N/A
Measure voltage at MB J5,
2232 Vdc?
YES: Continue
Pin B to Pin A (GND)
Replace MB
NO:
AM-7239*
NO: Continue
used?
YES: Replace VAA
LS-671 used?
YES: Go to 2.5
NO:
Replace VAA
2.5 Remove CX-13292 from MB J3
N/A
N/A
Set VAA to LOCAL and install
N/A
N/A
DS1 lit?
Set VAA CB1 to ON
YES: Go to 2.6
Replace VAA
NO:
2.6 Set RTA LS-671 CB1 to ON
N/A
N/A
Check continuity at CX-13292,
Open?
YES: Go to 2.7
Pin B to Pin D
NO:
Go to 2.8
2.7
Remove CX-13292 at RTA LS-671 J1
N/A
N/A
Check continuity at LS-671 J1,
Open?
YES: Replace LS-671
Pin B to Pin D
NO:
Replace CX-13292
2.8
Set VAA & RTA LS-671 CB1s to OFF
N/A
N/A
Remove VAA
N/A
N/A
Measure voltage at MB J3,
2232 Vdc?
YES: Go to 2.9
Pin B to Pin A (GND)
NO:
Replace MB
2.9 Check continuity at MB
Open?
YES: Replace MB
J5, Pin E to J3, Pin D
NO:
Go to 2.10
2.10 Reconnect CX-13292 at MB J3
N/A
N/A
Set VAA to REMOTE and install
N/A
N/A
Set VAA & RTA LS-671 CB1s to ON
DS1 lit?
YES: Problem was loose
cable or improperly
seated equipment
NO:
Replace VAA
*
Not AM-7239A or AM-7239B
310
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