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4.6.6 Diode D1 Service Check
1.
Turn the power off.
2.
3.
4.
5.
6.
Remove the printer covers (4.6.1) steps
1 through 3.
Open the card gate and remove the diode
cover.
Disconnect the wire on the side of the
diode
a .
Do not lose the two nylon
spacers
and nut when disassembling.
Using an ohmmeter (X10 scale), measure
the resistance between TB 1-2 and the
metallic case of the diode. The readings
should be:
a. Forward resistance 180 ohms, ±20%.
b. Backward resistance near infinity. (To
check, reverse the meter leads.)
Reconnect the wire and mounting screw
after the diode is checked and restore
power.
·s
,----
-- - - - -
- - - - - - -
l@O"'----~1
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4-102
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