©2001 PACE Inc., Laurel, Maryland
Page 12 of 14
All Rights Reserved
Oxidation build-up in heater
Bore
Clean Heater Bore using
wire brush
No Ground on Tip
Check resistance: Pin 4 to
a new tip. Resistance
should be less than 2 ohms,
if not see Solution
Defective Heater
Replace Heater Assembly
Heater Specifications
: PS-90 = 8-10 ohms
PS-70 = 11.3-12.3 ohms
Connector Plug Pin-Outs
Table 2: Heater Assembly Diagnostic Procedures
PS-70/PS-90 Heater Replacement
Ensure that the installed heater of the PS-70/90 handpiece is defective by referring to Table 4 (Heater
Assembly Checkout Procedures). If replacement becomes necessary, perform the following
procedure to ensure optimum performance and maximize the life expectancy of the heater.
1. Allow the heater to cool.
2. Remove the Heater Retaining Nut.
3. Pull the Heater Assembly from the Handle. Discard
defective Heater Assembly.
4. Align the connector key on the handle end of the
replacement Heater Assembly with the keyway slot on
the handle.
5. Push the Heater Assembly fully into the handle.
6. Replace the Heater Retaining Nut and tighten by hand.
Packing List
Quantity Supplied
ST 25 or ST 35
with PS-70
ST 25 or ST 35
with PS-90
ST 25 TT
Item #
Description
Part Number
ST 25
ST 35
ST 25E
ST 35E
ST 25
ST 35
ST 25E
ST 35E
ST 25
ST 25E
1
System Power Supply
------
1
1
1
1
1
1
2
PS-70 Handpiece Kit
(37W)
6993-0236-P1
0
0
1
1
0
0
3
PS-90 Handpiece Kit
(51W)
6993-0199-P1
1
1
0
0
0
0
4
TT-65 Handpiece (74W)
7025-0001
0
0
0
0
1
1
5
Power Cord, 115V
1332-0094
1
0
1
0
1
0
6
Power Cord, 230V
1332-0093
0
1
0
1
0
1
7
TT-65 Tip & Tool Stand
-----
0
0
0
0
1
1
8
ST TT Accessory Kit
-----
0
0
0
0
1
1
9
Tip Tool
1100-0206
1
1
1
1
1
1
10
Operations Manual
5050-0452
1
1
1
1
1
1
11
TT-65 Operation Manual
5050-0336
0
0
0
0
1
1
Table 3: Packing List
Spare Parts
Item #
Description
PACE Part Number
Fuse, 1.0 Amp Time Lag (ST 45 and ST 55)
1159-0246-P5
1
Fuse, 1.0 Amp Time Lag (ST 45E and ST 55E)
1159-0213-P5
2
PS-70 Heater, 21V, 37W
610-0128-P1
3
PS-90 Heater, 21V, 51W
6010-0095-P1
