Lincoln Electric 11694 Service Manual page 32

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POWER WAVE S350
POWER FACTOR CORRECTION CONTROL BOARD TEST
Table F.2 – Power factor correction control board resistance checks
DESCRIPTION
AUXILIARY POWER
INPUT CIRCUIT
AUXILIARY POWER DIODE
CIRCUIT ON SWITCH BOARD
AUXILIARY POWER DIODE
CIRCUIT ON SWITCH BOARD
PRE-CHARGE RELAY
DRIVE CIRCUIT
FULL BRIDGE GATE
DRIVE CIRCUIT
MAIN BUCK GATE
DRIVE CIRCUIT
AUXILIARY BUCK
GATE DRIVE
MAIN BOOST
GATE DRIVE
AUXILIARY BOOST
GATE CIRCUIT
METER TEST POINTS
AND POLARITY
RECEPTACLE J27 PIN 3 (-)
TO
RECEPTACLE J27 PIN 4 (+)
B48 (-)
TO
PLUG J27 PIN 4 (+)
B12 (-)
TO
PLUG J27 PIN 4 (+)
PLUG J23 PIN 3 (-)
TO
PLUG J23 PIN 4 (+)
PLUG J23 PIN 6 (+)
TO
PLUG J23 PIN 5 (-)
PLUG J23 PIN 11 (-)
TO
PLUG J23 PIN 12 (+)
PLUG J23 PIN 2 (-)
TO
PLUG J23 PIN 1 (+)
PLUG J23 PIN 8 (-)
TO
PLUG J23 PIN 7 (+)
PLUG J23 PIN 9 (-)
TO
PLUG J23 PIN 10 (+)
EXPECTED READINGS
VERY HIGH RESISTANCE.
GREATER THAN 50,000 OHMS.
VERY HIGH RESISTANCE.
GREATER THAN 50,000 OHMS.
VERY HIGH RESISTANCE.
GREATER THAN 50,000 OHMS.
VERY HIGH RESISTANCE.
GREATER THAN 30,000 OHMS.
HIGH RESISTANCE.
GREATER THAN 5,000 OHMS.
RESISTANCE SHOULD BE
GREATER THAN 500 OHMS.
RESISTANCE SHOULD BE
GREATER THAN 500 OHMS.
RESISTANCE SHOULD BE
GREATER THAN 500 OHMS.
RESISTANCE SHOULD BE
GREATER THAN 500 OHMS.
TROUBLESHOOTING AND REPAIR
(continued)
CONDITIONS
INPUT POWER REMOVED.
REMOVE PLUG J27 FROM THE
PFC BOARD. TYPICAL FAILURE
IS A SHORT.
INPUT POWER REMOVED.
TYPICAL FAILURE IS A SHORT.
IF SHORTED PERFORM THE
SWITCH BOARD REMOVAL
AND REPLACEMENT
PROCEDURE.
INPUT POWER REMOVED.
TYPICAL FAILURE IS A SHORT.
IF SHORTED PERFORM THE
SWITCH BOARD REMOVAL
AND REPLACEMENT
PROCEDURE.
INPUT POWER REMOVED.
REMOVE PLUG J41 FROM THE
SWITCH BOARD. TYPICAL
FAILURE IS A SHORT.
INPUT POWER REMOVED.
REMOVE PLUG J41 FROM THE
SWITCH BOARD. TYPICAL
FAILURE IS A SHORT.
INPUT POWER REMOVED.
REMOVE PLUG J41 FROM THE
SWITCH BOARD. TYPICAL
FAILURE IS A SHORT.
INPUT POWER REMOVED.
REMOVE PLUG J41 FROM THE
SWITCH BOARD. TYPICAL
FAILURE IS A SHORT.
INPUT POWER REMOVED.
REMOVE PLUG J43 FROM THE
SWITCH BOARD. TYPICAL
FAILURE IS A SHORT.
INPUT POWER REMOVED.
REMOVE PLUG J43 FROM THE
SWITCH BOARD. TYPICAL
FAILURE IS A SHORT.
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