Page 3-11
CHAPTER 3 CHECKOUT, CALIBRATION AND MAINTENANCE
Effective
09/2005
SERVICING THE BALANCER
NOTE:
BEFORE OPENING THE MACHINE FOR SERVICE, DISCONNECT ELECTRICAL SUPPLY LINE.
The balancer is supplied with a power transformer. It is critical to have the proper input voltage in order for the
balancer to operate correctly. The transformer is rated at 9VAC @ 1900 milliamps.
To check power cable:
•
Disconnect the power supply from the balancer.
•
Using a VOM, check for an output voltage at the end of the power plug 9VAC +/- 1VAC.
CONTROL PANEL REMOVAL AND REPLACEMENT
• Using a small pocket screwdriver, gently pry the
display from the weight tray. The display is held in
place with velcro and should remove easily. (Figure
3-14
•
There are four (4) major components on the control
panel. (Figure 3-15
•
Digital Processor PCB
•
Power PCB
•
Display PCB
•
Keypad
• Both the digital processor and power supply PCB
are held in place with (4) 8mm nuts. Disconnect the
harnesses leading to the PCB’s and remove the
nuts.
• In order to remove the Display PCB the techni-
cian must remove both the digital processor
and the power supply PCB. Disconnect the
keypad and remove the (8) standoffs.
• Once the keypad is removed from the panel it
cannot be reused. The keypad can be removed
by gently peeling back at a corner. If a keypad
is suspect for replacement, it is suggested
testing a new keypad before replacement.
Display PCB
Power PCB Processor PCB
Control Knobs
Backing plate
Figure 3-14
Figure 3-15