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REPAIR
SERVICE HINTS
1. OPERATIONAL PROBLEMS: Refer to the PACE Operation & Maintenance Manual (P/N 5050-
0313) for complete operational instructions on use of this product. If a Password has been installed by
the system user, remove the Password before proceeding with the repair. The user can reinstall the
Password after the system is repaired.
2. VACUUM FAILURES: Failures of this nature can be caused by either the unit or the SensaTemp
handpiece. Remove the Air Hose (and attached VisiFilter) from the SNAP-VAC Port and check for
vacuum at the port. If sufficient vacuum is present, the malfunction exists in the handpiece. Further,
if vacuum is sufficient at the port, check the vacuum level at the end of the glass solder collection
chamber (Sodr-X-Tractor handpieces only, chamber must be checked cold). Take the applicable steps
shown following.
a) Handpiece Failures: Replace VisiFilter if necessary; clean heater bore and replace tip, check air
hose for holes and ensure that glass solder collection chamber (Sodr-X-Tractor handpieces only) is
properly seated against heater seal.
b) Unit Failures: Remove the unit front panel (see "Disassembly/Assembly"). Check internal hosing
for kinks and replace internal VisiFilter (attached to pressure port on motor pump assembly).
3. HEATING CONTROL CIRCUITS: Must be checked under load (with handpiece/s plugged in). The
output(s) are obtained by switching triacs on and off. The voltage level to the handpiece(s) does not
change when adjusting the Set Tip Temperature. The control circuit of the unit varies the duty cycle of
voltage application as required to achieve and maintain the set temperature of the handpiece.
4. HEATING FAILURES: Usually caused by defective SensaTemp handpiece heaters. Refer to the
"Heater Assembly Checkout Procedures", Table I. When checking the system power source, use a
known good handpiece.
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