Lincoln Electric V155-S service manual 20TROUBLESHOOTING & REPAIRF-20

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F-20TROUBLESHOOTING & REPAIRF-20

INPUT BOARD VOLTAGE TEST (CONTINUED)

FIGURE F.8 – INPUT BOARD TEST POINTS

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PIN 3

PIN 1 PIN 2

INPUT BOARD

AC1

AC2

PIN 14

PIN 12

JP1

PIN 8

PIN 4

DC-

DC+

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PROCEDURE

1. Disconnect power to the INVERTEC® V155-S.

2. Perform the Case Cover Removal Procedure (left

side only).

3. Connect the main 230VAC to the the machine and switch ON the input switch.

Note: Pay attention to wiring diagram very closely. When connecting cables from the Input Board to the Power Switch. You must con- nect the cables as shown in Figure F.9.

PWR 2(white) to 4	PWR 1(blue) to 1
PWR 4(white) to 5	PWR 3(blue) to 2

4.Using a multimeter, check for 230VAC between AC1 and AC2. See Figure F.8.

5.Check for 320-325VDC between DC+ and DC-

6.Using pin 8,9,15 or 16 of JP1 as a common (-) point: Check pin 2,4 and 14 for +15VDC.

Check pin 12 for +5VDC.

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INVERTEC® V155-S