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Page 35
SERVICE (cont.)
DIGITAL TIMER (ELECTRO/MECHANICAL ONLY)
(LATE MODELS)
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P2231.35
NEW STYLE
FIG. 31 DIGITAL TIMER
Location:
The timer is located inside the front of the trunk on
the top of the component bracket.
Test Procedure.
NOTE: Do not remove or install wires while timer board
is installed. Pressure applied to one side may cause
damage to the board.
1. Disconnect the brewer from the power source and
remove the front access panel.
2. Remove the two #8-32 screws securing circuit
board to the mounting bracket.
3. Remove circuit board and spacers (as required).
4. With a voltmeter, check the voltage across termi-
nals TL1 and TL2 when the "ON/OFF" switch is in
the "ON" position. Connect the brewer to the power
source. The indication must be:
a) 120 volts ac for three wire 120/208 or 120/240
volt models.
b) 200 to 240 volts ac on two wire 200 or 240 volt
models.
5. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #6.
If voltage is not present as described, refer to the
Wiring Diagrams
and check the brewer wiring har-
ness.
6. With a voltmeter, check the voltage across termi-
nals TL1 and TL4 when the "ON/OFF" switch is in
the "ON" (upper) position. Connect the brewer to
the power source. The indication must be 0 volts.
If voltage is as described, proceed to #7.
If voltage is not as described, disconnect the brewer
from the power source and replace the timer.
7. With a voltmeter, check the voltage across termi-
nals TL1 and TL4 when the "ON/OFF" switch is in
the "ON" (upper) position. Select the 2 gallon batch
setting. Connect the brewer to the power source
and press the "START" switch. The indication must
be as follows:
a) 120 volts ac for three wire 120/208 or 120/240
volt models for approximately 1 minute 20 sec-
onds for a 2 gallon batch.
b) 200 to 240 volts ac on two wire 200 volt or 240
volt models for approximately 1 minute 20 sec-
onds for a 2 gallon batch.
8. Select the 1-1/2 gallon batch setting and repeat #7.
The voltage indication should remain for approxi-
mately 1 minute.
9. Select the 1 gallon batch setting and repeat #7. The
voltage indication should remain for approximately
40 seconds.
If voltage is present as described, the brew timer is
operating properly. Reset the timer as required, to
obtain the desired brew volume.
If voltage is not present as described, disconnect the
brewer from the power source and replace the timer.
Removal and Replacement:
1. Remove the two #8-32 screws securing circuit
board to the mounting bracket.
2. Remove circuit board and spacers (as required).
3. Remove all wires from the timer.
4. Attach all wires to the replacement timer board
prior to installation to the component mounting
bracket. Refer to FIG. 32 when reconnecting the
wires.
5. Install new circuit board with spacers (as re-
quired) to the component mounting bracket.
6. Adjust the timer as described below.
27362 092900