HENNESSY INDUSTRIES Coats IBS 2000, Руководство по обслуживанию и руководство по устранению неполадок

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Service Manual — COATS Model IBS 2000 • 17
L C D
Contrast won't adjust
Perfor m pre-
diagnostic check
(balancer must be
displaying
m e r c h a n d i s i n g
message to proceed).
Troubleshooting complete.
N o
Ye s
Check -12 vdc on
power suppy.
U s e s e t - u p m e nu ,
adjust contrast.*
N o
Ye s
Ye s
Ye s
N o
Refer to DC wir ing
d i a gra m # 1 1 2 3 6 8 .
Replace display board
R e p l a c e
display
b o a r d
N o
Disconnect
P10 (power) on the
CPU. Check -12v
again?
N o
R e p l a c e C P U
Ye s
*NOTE: Tur n the power off. While
holding down the first (from the left) rim
weight locator key, Tur n the power back
on. This will get you into the contrast
adjustment mode. Adjust as necessar y
and Save setting.
Is hardware
adjustment
(potentiometer)
present on display
b o a r d ?
Adjust potentiometer
on back of display
board. Does this
correct the problem?
Direct Drive
LCD Contrast Won’t
Adjust