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4.2.6 Diode D 1 Service Check
1.
Turn the power off.
2.
Remove the printer covers (4.2.1) steps
1 through 3.
3.
Open the card gate and remove the diode
cover.
4.
Disconnect the wire on the side of the
diode
rJ .
Do
not lose the two nylon
spacers
and nut when disassembling.
5.
Using an ohmmeter (X 1 0 scale), measure
the resistance between TB1-2 and the
metallic case of the diode. The readings
should be:
6.
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.
4-22
Mounting Plate
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