ADC AD-81 Service Manual page 56

G. "Door" condition...
NOTE: Make sure main door and lint drawer are closed. Also, if checking either switch, the plunger
must be depressed.
Check light emitting diode (L.E.D.) input light "door" on component side of the computer. If light is on, replace
computer.
1. Check voltage (24 VAC) across terminal block nos. 5 and 7.
If voltage is present, problem is bad wire(s) or termination(s) between terminal block 5 and computer
15-pin connector 2, or faulty computer.
If no voltage is present, check for voltage across the 15-pin modular connector nos. 1 and 2 against ground.
If voltage is evident at both points, problem is bad wire(s) or termination(s) between terminal block 5 and
pin 2 of the 15-pin modular connector or pin 1 of that same connector to the in-line connector on the output
of the 24 volt XFMR located in the computer box area.
2. If voltage is not evident at both points and ground (nos. 1 and 2 of the 15-pin modular connector located in
computer box area against ground).
If no voltage at either two (2) points, problem is faulty 24V XFMR (P/N 141403).
If voltage at one (1) point, trace the voltage through the lint drawer switch and the main door switch and
their connectors (J3 and J4), to the 15-pin modular connector 2.
If voltage stops at any one (1) of the switches, replace the switch.
If voltage stops at a connector, check the termination or wire back to the prior connector.
H. Microprocessor reads "DSFL"...
NOTE: Before continuing with this section check the 0.125 mA fuse on the computer board.
1. Replace the temperature sensor underneath the basket (tumbler) on a bracket (the bullet shaped device).
2. If it still reads "DSFL," unplug the 4-pin connector from the temperature sensor bracket. Also, unplug the
microprocessor 15-pin connector from the computer board. Where the white/red striped wire is going into
the connector, take a continuity reading across the wire and that same wire from the 4-pin connector that
you unplugged earlier in this paragraph.
If there is no continuity, check for break in wire, a short to the ground, loose termination(s), or even replace
the wire.
If there is continuity, do the same thing to the black wire right next to the white/red striped wire in the
15-pin connector.
If there is no continuity, check for break in wire, a short to ground, loose termination(s), or even replace the
wire.
If there is continuity, computer board is faulty.
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