Table 2-3. Troubleshooting - TM-11-6130-429-400032

TM 11-6130-429-40

Table 2-2. Converter Bench Test-Continued

Indication

Procedure

Step

a. Increase output current to 75 ADC.

b. Decrease input voltage to 21 VDC.

c. Measure output voltage at front panel (+5V P1 and +5V RTN).

Voltage shall be +5V and 0.1V.

Using the oscilloscope, measure the output ripple at P1 connector.

Ripple voltage shall be less than 150 MV.

Table 2-3. Troubleshooting

MALFUNCTION

TEST OR INSPECTION

CORRECTION ACTION

1. BLOWER NOT OPERATING, FAULT LAMP NOT LIT, ON/OFF SWITCH OFF.

Using multimeter, check continuity of Input EMI Filter and related components.

Repair wiring/replace defective components.

2. BLOWER NOT OPERATING, FAULT LAMP LIGHTED, ON/OFF SWITCH OFF.

Using multimeter, check continuity from P1-A1/P2-A1 to + terminal of blower B1 and from P1-A2/P2-A2 to - terminal of

B1.

Repair wiring/replace defective blower B1.

3. BLOWER OPERATES, FAULT LAMP NOT LIGHTED, ON/OFF SWITCH OFF.

Step 1. Using multimeter check continuity of bulb in FAULT lamp holder XDS1.

Replace defective bulb.

Step 2. Using multimeter, check continuity of wiring from L2B pin 4 to pin 1 of FAULT lamp DS1 and L2A pin 2 to pin 1 of

DS1.

Repair defective wiring/replace defective S1, R1 or lampholder XDS1.

4. BLOWER OPERATES, FAULT LAMP MAY OR MAY NOT BE LIGHTED, ON/OFF SWITCH ON, NO OUTPUT.

Step 1. Input EMI Filter and Related Components (P/O Main Frame) Check. Using multimeter, check continuity from P1-A1

and P2-A1 to J2-2 and from P1-A2 and P2-A2 to J2-1, with ON/OFF switch (S1) ON.

Repair wiring/replace S1. Replace defective component.

NOTE

The following tests require preliminary setup procedures.

PRELIMINARY SETUP PROCEDURES

1. Set converter ON/OFF switch to OFF.

2. Setup equipment as shown in figure 2-3.

3. Position cooling fan to circulate air around heatsink and rear panel.

4. Set test equipment controls as follows.

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