Thermo Scientific PARTISOL 2000, Service Manual

Page: 17 / 96

Revision
B.000
Service
Manual,
Partisol
Model
2000
Air
Sampler
S
ECTION
2
: T
ROUBLESHOOTING
G
UIDES
P
AGE
2-9
2.2.3.
D
ISPLAY
B
ACKLIGHT
T
ROUBLESHOOTING
F
LOW
C
HART
DISPLAY BACKLIGHT TROUBLESHOOTING FLOW CHART
Backlight not on
Yes
No
Resume normal
operation.
Is backlight on?
Power system
off then on.
Hit several keys on
the keypad.
Go to diagnostics
screen and turn on
backlight.
Yes
No Is backlight on?
Key on keypad pressed
before may be bad.
Check status of LED
“BLITE” on interface
board.
Yes
No
Is LED on?
Perform a system
reset and recheck
the LED.
Yes
No
LED on? Recheck backlight.
Replace display
R&P P/N 10-002254
Check continuity of cable
P16B (interface board)
and display connection
(see note 1).
Yes
No
Continuity OK?
Replace cable
R&P P/N 51-004665
Note:
1.Pins for continuity check of cable P16B to display:
P16B Display
Pin 1 A
Pin 2 K
Replace interface/CPU
board assembly
R&P P/N 50-005496
& 10-002407