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TROUBLESHOOTING & REPAIR |
POWER BOARD TEST
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H1
LEAD
H2
LEAD
C
LEADS
NEG
LEAD
#40
LEADS
MOUNTING1J21 SCREWS
|
|
| J21 |
H1 |
| 40 G1 | |
|
| B | G2 |
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|
| |
H2 | 4J20 |
|
|
|
|
| |
| 2J20 | J20 | 1J20 |
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| ||
C
NEG
#40
3J22 J22 1J22
4J22
2J22
POWER BOARD
L7941
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FIGURE F.11-Power Board Test Points
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TEST PROCEDURE
1. Connect input power to machine.
2.Turn ON/OFF Power Switch to OFF.
Test A: Test for 12 VAC voltage to Power Board
1.Locate and insert probes into Power Board Plug locations 1J22 (lead H4) and 3J22 (lead H3). See Figure F.11. Carefully insert the probes into
the lead cavity to make contact with the lead.
2.Turn ON/OFF Power Switch to ON.
a.If 12 VAC is NOT present, check Plug J22 for loose or faulty wiring.
bIf no loose or faulty wiring is
found, perform Main Transformer Test.
3.Turn ON/OFF Power Switch to OFF.
