Filter
Top Products
38
ELECTRICAL TROUBLESHOOTING (Continued)
Checkout Procedure
F. Check for 90 Volts DC across
(TDC) terminals #A1 to #A2 this
voltage drives the DC traverse
motor. NOTE: Traverse must be
on and have (TSP) turned full CW
to maximum voltage of 90 VDC
G. Check traverse motor continuity
H. Check (TSP) (10K) on control
panel
I. Check (TSP) for 10,000 ohms.
Remove three wires from (TDC)
red from term #8
white from term #7
black from term #9
J. Inspect Motor Brushes
Possible Cause
No DC Voltage from
(TDC) Traverse Drive
Control
Traverse Motor is bad
(TSP) is not working
(TSP) (10K) is bad
Worn motor brushes
Check (TDC) terminals #A1 to #A2 for 90
Volts DC
Yes--go to Step G. next
No--go to Step H. next
Remove motor wires from Terminal Strip 1
terminals #7 & #8 check for 0 ohms across
the black and white wires
Yes--end troubleshooting, motor should
work (if it does not, replace motor)
No--go to Step J. next
(TDC) Pin #8 to #7
Pot Full CCW Pot Full CW
0VDC 9.75 VDC
Pin #8 to 9
Pot Full CCW Pot Full CW
9.75 VDC 0 VDC
Yes--replace the (TDC)
No--go to Step I. next
Check for 10,000 ohms red to white wires
Full CCW--0 ohms
Full CW--10,000 ohms
Red to black wires
Full CCW--10,000 ohms
Full CW--0 ohms
Yes--replace the (TDC)
No--replace (TSP)
Remove the brushes one at a time and
maintain orientation for reinsertion. See if
brush is worn short, 3/8" (10 mm) minimum
length.
Yes--replace motor brushes
No--replace Traverse Motor
DISCONNECT POWER
FROM MACHINE
DISCONNECT POWER
FROM MACHINE