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Page 27
No LED’s
or LCD
Display
C
YES
Check
20 amp fuse for
continuity
(Page 14)
Replace
rectifiers
(Page 15)
Replace
PCB
(Page 15)
Problem
solved
No LED’s/LCD Display Troubleshooting Chart
Check input
voltage
120VAC. Voltage
correct?
(Page 13)
Wire timer
and/or
breaker
LED/LCD
turns on?
Ohm out
transformer
(Page 14)
Ohm readings
are correct?
(Page 14)
Check AC
voltage between
yellow wires
(Page 13)
voltage is
present?
NO
YES
NO
YES
YES
NO
Go to
C
Replace
transformer
Problem
solved
Correct
LED/LCD
turns on?
NO
YES
(Page 12)
Check DC
voltage between
black & red wires
YES
NO
NO
Reseat
DSP board
(Page 12)
Verify 3-5 VDC
on pins 2 and 4
(Page 12)
YES
NO
Replace
PCB
(Page 13)
Replace
display
(Page 13)
NO
YES
NO
Replace
fuse
LED/LCD
turns on?
YES
Check
Orange against
Ground 10-14 VDC
(Page 15)
NO
YES