Troubleshooting & repair, Dc power supply test (continued) – Lincoln Electric NA-5S User Manual
Page 94
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F-41
TROUBLESHOOTING & REPAIR
F-41
DC POWER SUPPLY TEST (continued)
NA-5
CHECK POINT
TEST
CONNECTOR
LEAD NO.
NORMAL
LOCATION
DESCRIPTION
PLUG PIN NO.
ACCEPTABLE
VOLTAGE
READING
PROCEDURE
CHECK +15VDC
PLUG J19
515 +
PC BOARD
SUPPLY FROM
PIN 5 +
J19 CONNECTOR
LOGIC BOARD
14.0 - 16.0 VDC
PLUG
TO
PLUG J19
500 -
PROCEDURE BOARD
PIN 15 -
VOLTMETER
CHECK +5VDC
TEST POINT
1.
TP5 +
BOARD SUPPLY
TP5
+
PRODUCED
4.75 - 5.25 VDC
ON THE
VOLTMETER TEST
POINT
1.
LEAD 510P -
BOARD 510P
-
SPEEDMETER
CHECK +5VDC
TEST POINT
1.
TP5 +
BOARD
SUPPLY
TP5 +
4.75 - 5.25 VDC
PRODUCED
ON THE
TEST POINT
1.
LEAD 510P -
SPEEDMETER 510P
-
BOARD
TABLE F.1 DC POWER SUPPLY CHECKS (continued)
500 -
515 +
1.
Scrape encapsulation from test points.
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