SERVICE CALL CONDITIONS
SM 4-115 B234/B235/B236/D101/D102/D103
Trouble-
shooting
PSU-E Replacement
Before replacing any part of the PSU (especially PCB A, PCB B):
• Switch the machine off.
• Disconnect it from the power source.
• Allow the machine to stand at least 10 minutes before you open the PSU box
door.
PCB-A and PCB B of the PSU-E are both provided with a large capacity electrolytic
condenser.
Such large condensers store a large residual charge that can cause electrical
shock if a board is handled too soon after the machine is turned off.
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