Pace ST75 Service Manual

ST 75 Systems

Operation & Maintenance Manual

TABLE OF CONTENTS

TITLE PAGE

General Information ..................................................................................................2

Introduction ..................................................................................................2

Specifications ................................................................................................3

Parts Identification ........................................................................................4

Safety .......................................................................................................................5

Safety Guidelines, English Language ............................................................5

Safety Guidelines, French Language .............................................................6

Safety Guidelines, German Language ............................................................7

Safety Guidelines, Italian Language ..............................................................8

Safety Guidelines, Portuguese Language ......................................................9

Safety Guidelines, Spanish Language .........................................................10

Safety Guidelines, Swedish Language .........................................................11

Set-Up ....................................................................................................................12

Tip & Tool Stand ......................................................................................... 12

Handpiece Vacuum/Pressure .......................................................................13

Handpiece Conntection...............................................................................14

System Power Up ........................................................................................14

Heater Burn In ............................................................................................. 15

Operation ...............................................................................................................15

Temperature Selection .................................................................................15

LED Operation .............................................................................................16

Repair ..................................................................................................................... 17

Repair Procedure .........................................................................................17

Calibration ................................................................................................... 18

Corrective Maintenance ..............................................................................19

Power Source ....................................................................................19

Handpieces .......................................................................................20

Disassembly/Assembly...............................................................................21

Assembly Detail ..........................................................................................23

Wiring Diagram............................................................................................24

Schematic ....................................................................................................25

i

TABLE OF CONTENTS

Packing List/Spare Parts......................................................................................... 28

Packing List ................................................................................................. 28

Spare Parts...................................................................................................29

Limited Warranty Registration ...............................................................................30

TABLE PAGE

Table 1 Power Source .........................................................................................19

Table 2 Heater Assembly Checkout Procedures.................................................20

Table 3 Packing List............................................................................................ 28

Table 4 Spare Parts .............................................................................................29

ii

PACE Incorporated retains the right to make changes to specifications
contained herein at any time, without notice.

Contact your local authorized PACE Distributor or PACE Incorporated to
obtain the latest specifications.

The following are registered trademarks and/or servicemarks of PACE
Incorporated, Laurel Maryland U.S.A. and may only be used to identify
genuine PACE products or services:

Arm-Evac, Mini-Wave, PACE, SensaTemp, Snap-Vac, Sodrtek, Sodr-X­Tractor, ThermoFlo, ThermoJet, ThermoTweez, Toolnet, Visifilter.

For any questions regarding this Operation & Maintenance Manual, contact
your local authorized PACE distributor or contact PACE directly at the
appropriate address listed below.

PACE USA 9893 Brewers Court, Laurel, Maryland 20723-1990

Tel. [phone] (toll-free), [phone]
FAX [phone]
www.paceworldwide.com

PACE EUROPE Sherbourne House Sherbourne Drive Tilbrook

Milton Keynes United Kingdom MK7 8HX
Tel. [phone] FAX [phone]

© 2000 PACE Incorporated, Laurel MD. All rights reserved. Printed in the U.S.A.
iii

MANUAL NUMBER 5050-0456

REV. C

1

General Information

Introduction

Thank you for purchasing the PACE model ST 75 Soldering/Desoldering System.
This manual will provide you with the information necessary to properly set up,
operate and maintain the ST 75 system.

The ST 75 systems are available in either the 115 VAC, or 230 VAC version which
incorporates a highly responsive SensaTemp (closed loop) control system providing
up to 80 Watts of total power to a single output channel. The 230 VAC version
system bears the CE Conformity Marking which assures the user that it conforms
to all the requirements of council directive EMC 89/336/EEC. The systems
package the power source with a selection of accessories and functional aids.

The PACE Sodr-X-Tractor handpiece provides thermally enhanced thru-hole
desoldering, safe removal of TQFP (Thin Quad FlatPack) and TSOP (Thin Small
Outline Package) surface mount components and continuous removal of old solder
from surface mount lands.

PACE SensaTemp handpieces may be used with the ST 75 system to perform a wide
variety of advanced surface mount & thru-hole component removal/replacement
operations.

2

General Information

Specifications

System power sources are available in either the 115 VAC or 230 VAC version.
The 230 volt system bears the Conformity Marking which assures the user that it

conforms to all the requirements of (EU) directive EMC 89/336/EEC & 73/23/EEC.

System Power Source Power Requirements:

ST 75 - Operates on 97-127 VAC, 50/60Hz

120 Watts maximum at 115 VAC, 60Hz

ST 75E - Operates on 197-253 VAC 50/60Hz

120 Watts maximum at 230 VAC, 50Hz

Temperature Specifications:

Tip Temperature Range: 204°C to 454°C (400°F to 850°F) nominal.
Temperature Stability: ±1.1°C (±2°F) at idle from set tip temp.

NOTE - Actual minimum and maximum Operating Tip Temperatures may vary
depending on Handpiece, Tip selection and application.

Vacuum And Air:

(Measurements at front panel Vacuum and Controllable Pressure Ports.)

Vacuum Rise Time: 200 ms average as measured by PACE

PPM 100 Process Monitor.

Vacuum: 51 cm Hg. (20 in. Hg.) (nominal)
Pressure: 1.44 Bar (21 P.S.I.) (nominal at MAX setting)
Air Flow: 6 SLPM (0.22 SCFM) maximum

EOS/ESD Specifications:

The specifications shown below apply except on "Soft Ground Systems" which have
a 1 meg ohm current limiting resistance and a label placed on the power source front
panel referring to EN 100015-1.

Tip-To-Ground Resistance: Less than 2 ohms.
AC Leakage: Less than 2 millivolts RMS from 50Hz to 10MHz.
Transient Level: Less than 500mV peak, out to 100MHz.

3

General Information

Parts Identification

1 - Power Receptacle
2 - LED
3 - Variable Temperature Control
4 - Vacuum Port
5 - Controllable Pressure Port
6 - Power Switch

7/8 - AC Power Receptacle/Fuse

Holder

9 - Earth Ground Receptacle
(230 VAC Systems only)

4

Safety

Safety Guidelines - English Language

The following are safety precautions which personnel must understand and follow
when using or servicing PACE products.

1. POTENTIAL SHOCK HAZARD - Repair procedures on PACE products

should be performed by Qualified Service Personnel only. Line voltage
parts may be exposed when the equipment is disassembled. Service
personnel must avoid contact with these parts when troubleshooting the
product.

2. To prevent personnel injury, adhere to safety guidelines in accordance
with OSHA and other applicable safety standards.

3. SensaTemp handpiece heaters and installed tips are hot when the
handpiece is powered on. DO NOT touch either the heater or the tip.
Severe burns may result.

4. PACE Tip & Tool Stands and handpiece cubbies are designed specifically
for use with the associated handpiece and houses it in a manner which
protects the user from accidental burns. Always store the handpiece in its
holder. Be sure to place the handpiece in its holder after use and allow to
cool before storing.

5. Always use PACE systems in a well ventilated area. A fume extraction
system such as those available from PACE are highly recommended to
help protect personnel from solder flux fumes.

6. Exercise proper precautions when using chemicals (e.g., solder paste).
Refer to the Material Safety Data Sheet (MSDS) supplied with each
chemical and adhere to all safety precautions recommended by the
manufacturer.

5

Sécurité

Directives de Sécurité, Française Langue

Les précautions suivantes, sont celles que le personnel doit comprendre et suivre
lorsqu'il utilise, effectue la maintenance ou se sert d'un produit PACE.

1. Danger potentiel de choc èlectrique - Les procédures de réparation sur

les produits PACE doivent être effectuées seulement par du personnel
qualifié. Des parties de l'équipement désassemblées peuvent être sous
tension. Le personnel de maintenance doit éviter tout contact avec ces
parties en réparant le produit.

2. Pour prévenir tout préjudice, le personnel adhère au guide de sécurité en
accord avec OSHA (équivalent à des normes françaises de sécurité) et
d'autres standards de sécurité applicable.

3. La mise sous tension des outils SensaTemp comporte des éléments
chauffants (buse). Ces derniers, gardent la chaleur même après la mise
hors tension pendant un certain temps. Ne pas toucher les parties
chaudes aux extrémités des outils. Des brûlures sévères peuvent en
résulter.

4. Les outils PACE et leurs pannes ainsi que le support sont dessinés de
manière spécifique afin de protéger l'utilisateur/opérateur de brûlures
accidentelles. Reposer toujours les outils après chaque utilisation dans
leurs étuis/supports afin de permettre leur refroidissement.

5. Utiliser toujours les stations Pace dans unlieu bien ventilé. Des
extracteurs de fumée Pace sont hautement recommandés pour protéger
votre personnel des vapeurs de soudure/flux.

6. Prenez les mesures nécessaires quand vous utilisez des produits (ex:
solder paste) chimiques. Reportez-vous au document (fiche technique/
sécurité) du fabricant fourni avec chaque produit. Respectez toutes les
procédures de sécurité recommandées par le constructeur.

6

Sicherheit

Sicherheit Korrekturlinien, Deutsche Sprache

Die nachfolgenden Sicherheitsvorschriften sollten vom Bedien- un Servicepersonal
verstanden und befolgt werden.

1. Entladung spannungsfuehrender Teile - Reparaturen an PACE Produkten

sollten nur von qualifizierten Personal durchgefuehrt werden.
Spannungsfuehrende Teile koennen sich bei gezogenen Netzstecker
entladen. Servicepersonal muss den Kontakt dieser Teile vermeiden.

2. Um moegliche Gefahren fuer Personen auszuschliessen, muessen alle

Sicherheitsvorschriften in Uebereinstimmung mit OSHA und anderen
anwendbaren Sicherheitsstandards eingehalten werden.

3. Angeschlossene SensaTemp Heizelemente von Handwerkzeugen und

installierte Loetspitzen sind heiss wenn das System eingeschaltet ist oder
erst vor kurzer Zeit ausgeschaltet wurde. Heizelement und Loetspitze
nicht beruehren. Verbrennungsgefahr.

4. PACE Tip & Tool und andere Handwerkzeugablagen sind so konstruiert,

dass ein versehentliches Beruehren des dazugehoerendes
Handwerkzeuges vermieden wird. Bewahren Sie das Handwerkzeug nach
Gebrauch stets in der Ablage auf. Bevor das Handwerkzeug an einem
anderen Ort gelagert werden muss, lassen Sie es in der Werkzeugablage
vollstaendig abkuehlen.

5. Benutze PACE Systeme nur in gut beluefteten Raeumen. Ein

Loetrauchabsaugsystem, wie es z.B. von PACE erhaeltlich ist, hilft
Bedienpersonen von den Gefahren von Loetrauch zu schuetzen.

6. Wenn Chemikalien (z.B.: Lotpaste) verwendet werden, muessen alle die in

den Sicherheitsdatenblaettern des Herstellers ausgewiesenen
Sicherheitsvorschriften eingehalten werden.

7

Sicurezza

Misure di Sicurezza, Italiana Lingua

Le seguenti instruzioni sono misure di sicurezza che il personale deve comprendere e
seguire quando utilizza o ripara I prodotti PACE.

1. EVENTUALI RISCHI DI SHOCK ELETTRICO- Si consiglia di far

eseguire le operazioni di riparazione dei prodotti PACE, da un servizio di
personale qualificato. Quando la stazione non é assemblata le parti
sottoposte alla tensione di linea potrebbero essere scoperte. Il personale
deve evitare il contatto con queste parti durante manutenzione del
prodotto.

2. Per evitare eventuali pericoli al personale, attenersi alle norme di sicurezza

previste dalla guida, in conformitá all’OSHA e agli altri Standard di Sicurezza
applicabili.

3. Le resistenze PACE Sensatemp e le punte installate sono calde quando la

stazione é accesa e per un periodo successivo allo spegnimento. Non
toccare la resistenza e la punta. Puó comportare gravi ustioni.

4. I supporti PACE sono specificamente costruiti insieme alla corrispondente

impugnatura e progettati per un uso che protegge gli utenti da ustioni
accidentali. Mettere sempre l’impugnatura nel propio supporto dopo
l’utilizzo e lasciarla raffredare prima di riporla.

5. Utilizzare sempre I stazioni PACE in una zona be aerata per proteggere il

personale dai fumi. É fortemente raccomandato un sistema di aspirazione
(dei fumi) come quello disposta dalla PACE.

6. Usare precauzioni quando si utilizzano sotanze chimiche (es. Pasta di

stagno). Fare riferimento al Material Safety Data Sheet (MSDS) fornita con
ogni sostanza chimica e seguire tutte le misure di sicurezza raccomandate
dal fabbricante.

8

Segurança

Guidelines de Segurança, Portuguese Lingua

Segeum-se precauções de segurança que os operadores devem compreender e seguir
ao utilizar ou reparar produtos PACE.

1. Perigo de choque eléctrico - Os procedimentos de reparação em

produtos PACE, devem ser apenas efectuados por pessoal qualificado.
Linhas de alimentação podem ficar expostas ao desmontar o
equipamento. Pessoal de reparação deve evitar o contacto com essas
partes ao reparar o produto.

2. Para evitar danos pessoais, siga as normas de segurança OSHA ou

outras normas aplicáveis.

3. Resistencias de aquecimento dos ferros e as pontas instaladas estão

quentesquando o ferro está alimentado, e mesmo durante algum tempo
após ser desligado. NUNCA TOCAR nem na resistencia de aquecimento
nem na ponta. Pode resultar em queimaduras severas.

4. Os suportes para pontas e ferros da PACE, foram concebidos para uso

especifico, e para proteger o operador de queimaduras acidentais.
Coloque sempre os ferros nos respectivos suportes. Tenha a certeza de
colocar sempre o ferro no respectivo suporte após cada utilização e deixe­o arrefecer antes de o guardar.

5. Utilize sempre os sistemas da PACE em locais bem ventilados. Um Sistema de

extracção de fumos, como os Sistemas disponiveis na PACE, são altamente
recomendados para a protecção dos utilizadores contra os fumos produzidos pela
solda e fluxo.

6. Tenha precauções apropriadas ao utilizar produtos quimicos (ex. pasta de soldar).

Lêr sempre atentamente os normas de segurança fornecidas com cada produto
químico e siga sempre todas as precauções de segurança recomendadas pelo
fabricante.

9

Seguridad

Guias de Consulta de Seguridad, Espãnol Lenguaje

Lo siguiente es precauciones de seguridad que el personal debe entender y debe
seguir al usar o reparar productos de PACE.

1. RIESGO de SHOCK POTENCIAL - Los procedimientos de la Reparación en

productos de PACE sólo deben ser realizados por Personal de Servicio
Calificado. Pueden exponerse partes de voltaje de línea cuando el equipo se
desmonta. El personal de servicio debe evitar contacto con estas partes al
arreglar el producto.

2. Para prevenir lesión del personal, adhiera a las reglas de seguridad de

acuerdo con OSHA y otras normas de seguridad aplicables.

3. Las herramientas SensaTemp tienen sus calentadores y las puntas

instaladas calientes cuando la herramienta esta encendida y por un
periodo de tiempo después de apagar el equipo. No toque el calentador o
la punta. Las quemaduras severas pueden resultar.

4. El Soporte de punta y Herramienta PACE se diseñan específicamente para

el uso con las herramientas asociadas y las almacena de una manera que
protege al usuario de las quemaduras accidentales. Siempre guarde la
herramienta en su soporte. Esté seguro de poner la herramienta en su
soporte después del uso y permita que la herramienta enfríe antes de
guardar.

5. Siempre use sistemas de PACE en una área bien ventilada. Un sistema de

extraccíon de humo como esos disponibles de PACE se recomiendan para
ayudar a protejer al personal contra los humos de flujo de soldadura.

6. Ejercicie las precauciones apropiadas al usar químicos (ej., pasta de la soldadura).

Refiérase a la Hoja de Datos de Seguridad de Material (MSDS) proporcionadó con
cada químico y adhiere a todas las precauciones de seguridad recomendadas por
el fabricante.

10

Säkerhetsföreskrifter

Säkerhetsföreskrifter, Svenska

Följande säkerhetsföreskrifter måste förstås och följas av personal som använder eller
utför service på PACE produkter.

1. RISK FÖR STRÖMSTÖT - Service / Reparation av PACE produkter får

endast utföras av aktoriserad service personal. Strömförande delar kan
kommas åt när produkten är isärplockad. Iaktag aksamhet när felsökning
görs för att undvika strömstötar.

2. För att undvika personskada rekommenderas att OSHA eller andra

liknande arbetssäkerhets standarder följs.

3. SensaTemp verktygselement och installerade spetsar är heta när strömmen

är påslagen och en tid efter att strömmen slagits av. RÖR EJ element eller
spets. Risk för brännskador!

4. PACE Spets och Verktygshållare är speciellt utformade för att passa PACE

respektive verktyg så att risken för brännskador kan undvikas. När
verktyget ej används bör det alltid förvaras i sin hållare.

5. Tillse att ventilationen är god där PACE System används. Ett lödröksutsug

system som t.ex. PACE tillhandahåller rekommenderas för att skydda
användaren för giftig lödrök.

6. Tillse att gällande säkerhetsföreskrifter följs vid användning av kemikalier,

t.ex. lodpasta.Se säkerhetsdatabladen som medföljer kemikalierna och följ
de rekommenderade säkerhetsföreskrifterna från respektive tillverkare.

11

Set-Up

Tip & Tool Stand

If you have purchased a system with a handpiece, set up the Tip & Tool Stand in the
following manner. Set up any other SensaTemp handpiece, use the instructions
enclosed with the handpiece and associated Tip & Tool Stand.

1. Attach the stand to either side of the power source, in the following
manner.

a) Insert the 2 large hex head

Mounting Screws (head first) into
the lower "T" slot on the side of
the power source case as shown.

b) Place the Tip & Tool Stand in

position beside the power source.
Insert ends of the 2 Mounting
Screws into the 2 Tip & Tool
Stand mounting holes shown.

c) Install a Thumb Nut onto the end

of each Mounting Screw. Tighten
Thumb Nuts to secure the stand
in position.

2. Place handpiece into Tip & Tool Stand.

12

Set-Up

Handpiece Vacuum/Pressure

To set up your Sodr-X-Tractor air hose connection, perform the following steps:

1. Air Hose To Handpiece Connection
a) Attach one end of a 137cm (54 inch) length of air hose to the metal tube in

the back of the handpiece.

b) If you have a PACE system incorporating only one handpiece, attach the

air hose to the power cable using the supplied Hose Clamps. Space them
evenly along the length of the power cable starting at a point 6 inches from
the ends of the handpiece.

c) If you have a PACE system incorporating 2 or more air handpieces, you

may wish to leave the air hose assembly unattached to allow a quick
change to any air handpiece being used.

2. Prepare a VisiFilter in the following manner:
a) Connect a 1 inch (2.5cm) length of clear pvc air

hose to the FLOW OUT side of the VisiFilter;
push and turn the hose onto the VisiFilter
nipple to seat.

b) Insert the ribbed end of a male quick connect

hose mount fitting (P/N 1259-0087) into the free
end of the 1 inch (2.5cm) length of air hose
connected to the FLOW OUT side of the
VisiFilter.

c) Connect the free end of the 137cm (54 inch)

length of air hose to the FLOW IN side of the
VisiFilter.

d) Insert the end of the quick connect hose

mount fitting (on VisiFilter FLOW OUT side)
into the power source Vacuum Port.

3. When using air pressure, and/or utilizing multiple

air handpieces, PACE recommends the use of the following set up procedure
which utilizes additional quick connect hose mount fittings. An assortment of
quick connect air fittings are supplied with each additional air handpiece.

a) Disconnect the 137cm (54 inch) length of air hose from the FLOW IN side

of the VisiFilter assembly. Insert the ribbed end of a male quick connect
hose mount fitting (P/N 1259-0087) into the free end of this air hose.

13

Set-Up

b) Connect the free end of a 1 inch (2.5cm) length of air hose with an

installed female quick connect hose mount fitting (P/N 1259-0086) to
the FLOW IN side of the VisiFilter Assembly.

c) The 137cm (54 inch) length of air hose can now be easily moved

between the VisiFilter Assembly and the Controllable Pressure Port.
The VisiFilter assembly remains connected to the Vacuum Port.

4. Additional fittings may also be added to the hose connection at the rear of

each air handpiece to ease changing of handpieces.

NOTE

When removing any air hose, turn and pull. Do not attempt to pull hose directly off.
Damage to or breakage of fitting or VisiFilter may occur. Use your Sodr-X-Tractor with
a clean VisiFilter element. Otherwise a deterioration in performance or damage to the
unit may occur.

Handpiece Connection

Connect the handpiece connector plug into
the Power Receptacle in the following manner.

1. Align guide on connector with slot on

power receptacle.

2. Insert connector into power receptacle.

3. Turn the connector housing clockwise

to lock in place.

System Power Up

1. Insert the female end of the power cord into the AC Power Receptacle at

the rear panel of the power source.

2. Plug the prong end (male end) of the power cord into a 3 wire grounded
AC supply receptacle. The system is now ready for operation.

CAUTION

To insure operator safety, the AC supply receptacle must be checked for proper
grounding before initial operation.

3. Read this manual and all other included manuals thoroughly before
operating the system.

14

Set-Up/Operation

Heater Burn In

To insure optimum performance and long life, new TJ-70 handpieces must undergo a burn in
procedure. A Red tag is attached to each handpiece and with replacement heater assemblies
which describes the proper procedure. Perform the procedure listed on the tag when setting
up a new ST 75 system or when replacing a TJ-70 heater assembly.

NOTE

Ensure that the system is placed in a well-ventilated area. Smoke will be emitted from
the heater assembly during the burn in cycle.

Temperature Selection

Variable Temperature Control

Adjust the Variable Temperature Control Knob to the
desired temperature setting. Notice that the control
dial has a White graphic scale denoting temperature
in °C (Celsius) and a Yellow graphic scale denoting
temperature in °F (Fahrenheit). These numerical
scales denote the set tip temperature times 100 (e.g.,
“3” on the White scale is 3 x 100 or 300°C).

Temperature/Dial Lock

The Variable Temperature Control Knob can be locked
in position to avoid accidental or unauthorized
changes of the temperature setting. Perform the
following procedure to lock the Variable Temperature
Control Knob.

1. Adjust the Temp. Control Knob to the desired
temperature setting.

2. Using the Temp. Locking Key (hex key
supplied with system), tighten the set screw on
the Temperature Control Knob closest to the
front panel.

15

Operation

Tip Offset

Differences between the temperature settings and true tip temperatures are negligible
when using Thru-Hole, single point soldering tips. With any heating system
however, True Tip Temperatures can differ greatly from temperature settings when
using larger SMT soldering tips. This difference is called Tip Temperature Offset.
PACE recommends the use of the Tip & Temperature Selection System booklet (PACE
P/N 5050-0251) as a guide to accurately set and maintain a true tip temperature for any
size and type of SMT tip.

LED Operation

The Green colored LED on the power source front panel indicates System Status and
Power Receptacle output status (LED OFF, ON or Flashing). Following is an
explanation of these status indicators.

LED Full On - Continuous power is being delivered to the handpiece. This condition
is evident when the system is first powered up (handpiece heater cold) or the Variable
Temperature Control setting is increased.

LED Flashing - Indicates that the set tip temperature (as set on the Variable
Temperature Control) has been reached. Power to the handpiece is cycling Off and
On to maintain set temperature.

LED Off - No power is being delivered to the handpiece heater. This condition is
evident for a short period of time when set temperature is reached and stabilizing or if
the Variable Temperature Control setting is decreased. If the LED never illuminates,
check for a faulty handpiece (see Corrective Maintenance section). Also, if no
handpiece is connected to the power source, the LED will not illuminate.

16

Repair

Repair Procedure

The "Repair" section of this manual provides the technician with the information
necessary to determine the source of a malfunction and take the necessary steps to
correct it. In order to perform the most expedient repair, the technician must follow
the process listed below step by step, in order. Failure to do so will make the
diagnosis and repair much more difficult.

1. Periodic Maintenance - Required on any PACE handpiece used. Refer to

the the "Handpiece Operation" portion of this manual for specific
instructions. No periodic or special maintenance is required on the power
source.

2. Calibration - The system can be easily checked to verify temperature

accuracy. No internal adjustments can be made.

3. Corrective Maintenance - A guide for resolving minor malfunctions.

Locate the "Symptom" in the Corrective Maintenance Table (Power
Source or Heater Assembly Checkout table) which best describes the
malfunction. Check each point described under "Solution" in order of
listing.

4. Disassembly/Assembly - Contains simple instructions which enable the

technician to open/close the unit for servicing.

5. Repair Drawings - Exploded power source, wiring diagram and schematic

are included as aides in troubleshooting and repair.

6. PACE Service Department - If the cause for malfunction has not been

determined at this point, call the PACE Service Department at
1-(888)535-PACE (toll free) or FAX [phone].

17

Repair

Calibration

The ST 75 system is tested for temperature accuracy at the factory and can be
checked for calibration according to PACE requirements. Also, a temperature setting
normally used by the operator can be adjusted to the precise temperature indicated
on the Dial/Display. No internal adjustments can be made to the power supply. To
verify calibration of the power supply, perform the following procedure.

1. Install a tip with an attached thermocouple wire into the handpiece
connected to the system. Tips with K type thermocouples are available
from PACE; use part number 7021-0004-P1 when ordering.

2. Connect the thermocouple assembly to a PACE Process Monitor (part
number 8001-0077 or 8001-0078) or appropriate temperature meter.

3. When set fully counterclockwise,the pointer of the
Variable Temperature Control knob will align to the
Calibration Mark as shown. With the system turned
on, adjust the Variable Temperature Control to obtain
a stable tip temperature of 300°C (for PACE factory
specifications) or the temperature setting normally
used by the operator.

If the temperature displayed on the Process Monitor (or temperature meter) is
within ±15°C (27°F), perform steps 4 thru 6 to obtain a precise reading. If the
temperature is off by more than ±15°C, the handpiece may require
maintenance. Recheck the temperature using a second handpiece.

4. Carefully lock the Variable Temperature Control in position by tightening
the inner set screw (closest to front panel).

5. Loosen the outer set screw on the Variable
Temperature Control knob (furtherest from front
panel) using the Temp. Locking Key (hex key)
supplied with the system. Position the knob
with the pointer aligned to match the
temperature indicated on the Process Monitor
(or temperature meter). Secure the knob in
position by tightening the outer set screw.

6. Loosen the inner set screw (on Variable
Temperature Control knob) to unlock the
Variable Temperature control if adjustment of
operating tip temperature is desired.

18

Repair

Corrective Maintenance

Power Source

Most malfunctions are simple and easy to correct. Refer to Table 1 below to clear
these malfunctions.

Symptom Probable Cause Solution

No power to system. Blown Fuse Check handpiece using "Heater

Assembly Checkout Procedures",
Table 4. Replace fuse located in
AC Receptacle/Fuse Holder.

Insufficient vacuum or air
pressure.
Motor Pump runs.

No vacuum or air pressure.
Motor Pump does not run.

No heat on handpiece. Defective Heater Refer to "Heater Assembly

Handpiece air hose has a
kink or hole in hose.

VisiFilter or handpiece filter
clogged.

Handpiece chamber not
seated properly in
handpiece.

Defective Motor Pump
Assembly.

Defective handpiece. Check handpiece using "Heater

Defective Motor Pump
Assembly.

Defective Main PCB
Assembly

Check handpiece hose. Replace
air hose if necessary

Replace VisiFilter or handpiece
filter.

Check handpiece. Reseat
chamber if necessary.

Check vacuum and air pressure at
Motor Pump Assembly air hose
connections. Replace Motor
Pump Assembly if necessary.

Assembly Checkout Procedures",
Table 4.

Check for 12 VDC at motor
terminals with handpiece switch
actuated. Replace Motor Pump
Assembly if defective.

If there is no 12 VDC at Motor
Pump Assembly, repair or replace
Main PCB Assembly.

Checkout Procedures", Table 4.

Table 1. Power Source Corrective Maintenance

19

Repair

Handpieces

The following “Heater Assembly Checkout Procedures” (Table 2) is applicable to
all PACE SensaTemp handpieces used with the ST 75 system except for the TT­65 and DTP-80handpieces. Refer to the applicable manuals for troubleshooting
procedures pertinent to that handpiece. Perform the procedures with the
handpiece heater at room temperature. If the heater is warm, resistance readings will
be different from those shown. Disconnect the handpiece from the power source.
Use a meter to check resistance across the handpiece connector plug pins as
outlined in the “Checkout Procedure” column.

Symptom Checkout Procedure Cause Solution

Handpiece
does not heat.

Handpiece
overheating.

Fuse blows
when unit is
turned on.

No Ground on
Tip.

Check resistance - Pin 2 to
Pin 5. Refer to "Heater
Specifications" column.
If resistance is high - -

Check resistance - Pin 3 to
Pin 6. If circuit reads open -

­Check resistance - Pin 3 to

Pin 6. Resistance should be
110 ohms. If resistance is
less than 105 ohms - -

Check resistance - Pin 2 to
Pin 5. Refer to "Heater
Specifications" column. If
resistance is low - -

Check resistance - Pin 4 to
a NEW Tip. Resistance
should be less than 2 ohms.
If not - -

Heater Specifications

PS-80 = 8-10 ohms

SX-80 = 8-10 ohms

SX-70 = 8-10 ohms

Open Heater Replace Heater

Open Sensor Replace Heater

Shorted
Sensor

Shorted
Heater

Oxidation in
Heater Bore.

Defective
Heater

Assembly.

Assembly.

Replace Heater
Assembly.

Replace Heater
Assembly & Fuse.

Clean Heater Bore
using appropriate
wire brush.

Replace Heater
Assembly.

Connector

Plug Pinouts

TP-65 = 9-11 ohms

TJ-70 = 6-8 ohms

Table 2. Heater Assembly Checkout Procedures

20

Repair

Disassembly/Assembly

To remove the ST 75 power source cover, perform the following procedure step by
step, in sequence using the accompanying illustrations as a guide.

CAUTION

POTENTIAL SHOCK HAZARD - Disassembly of the ST 75 system power source

exposes line voltage parts. Replacement of the Pump Assembly must be performed
by qualified service personnel only. Service personnel must insure that the AC power
cord is disconnected prior to disassembly. Contact the PACE Technical Support
for assistance at tel. [phone]-PACE (7223), FAX [phone].

1. Place the unit on a suitable work surface with the front of the power
source facing forward.

2. Disconnect the AC power cable from the unit (if present).

NOTE

Use all ESD control precautions when servicing the ST 75 system. The power source
contains a PCB assembly utilizing static sensitive components.

NOTE

At this point, you may wish to
remove any accessories attached
to the power source to ease removal
of the 2 Cover Mounting Screws
(step 6).

3. Remove the 4 Front Panel
mounting screws located at
each corner of the Front Panel
Bezel.

4. Pull the Front Panel and Bezel
forward.

21

5. Remove the 3 upper Rear
Panel mounting screws.

6. Reposition the unit with the
rear of the power source
facing forward.

7. A Cover Mounting Screw is
located on each side of the
power source (positioned bottom center).
Remove the 2 Cover Mounting Screws.

8. Lift the Cover from the power source. Set Cover aside.

Repair

9. The power source components are now exposed for servicing. When
replacing the Main PCB Assembly or the Motor Pump Asembly, separate
instructions are supplied with the part.

10. To assemble the power source, perform steps 1 through 8 in reverse order,
installing parts (e.g., screws) instead of removing.

22

Assembly Detail

• Rear Panel
‚ Motor Pump Assembly
ƒ Front Panel
„ PCB Assembly
… Transformer

23

Wiring Diagram

Repair

24

Repair

Schematic

ST 75 Schematic, Sheet 1 of 2

25

Repair

26

Repair

Schematic Continued

ST 75 Schematic, Sheet 2 of 2

27

Packing List

Packing List/Spare Parts

PACKING LIST

This is a packing list of the items shipped with the
system and is current at the time of publication of this
manual.

Item # Description Part Number ST 75 ST 75E ST 75 ST 75E

1 ST 75 System Power Source - - - - - 1 1 1 1
2 SX-80 Handpiece, (48 Watts) 6010–0106 0 0 1 1
3 Power Supply Cord, 115 VAC 1332–0094 1 0 1 0

4 Power Supply Cord, 230 VAC 1332–0093 0 1 0 1

5 Tip & Tool Stand Kit 6019-0060-P1 0 0 1 1
6 SX-80 Accessory Kit - - - - - 0 0 1 1
7 Air Fitting Adaptor 1259–0081 0 1 0 1

Operation & Maintenance

8

Manual

9 Tip Tool 1100–0206 0 0 1 1

5050–0456 1 1 1 1

ST 75 Systems ST 75-SX80

Quantity Supplied

Systems

Table 3. Packing List

28

Packing List/Spare Parts

Spare Parts

Item # Description Part Number

Power Source Replacement Parts

Fuse,(F1), 1.25 Amp Time Lag, 115 Volt Systems 1159-0251

1

Power Cord 115 Volt Systems 1332-0094

2

3 Power Switch 1157-0081
4 Bumpon (rubber foot) 1274-0021
5 PCB Assembly 6020-0129-P1
6 Motor Pump Assembly 1336-0037-P1

Accessories & Spare Parts (partial list, complete listing in catalogue)

7 Tip & Temperature Selection System Booklet 5050-0251
8 SX-80 Sodr-X-Tractor Handpiece 6010-0106-P1
9 SX-80 Heater Assembly 6010-0107-P1

10 PS-80 Soldering Iron Handpiece 6010-0096-P1

11 DTP-80 Dual ThermoPik Handpiece 7029-0001-P1
12 TT-65 ThermoTweez Handpiece 7025-0001-P1
13 TP-65 ThermoPik Handpiece 7024-0001-P1
14 TJ-70 ThermoJet Handpiece 7023-0002-P1

0.63 Amp Time Lag, 230 Volt Systems 1159-0252

230 Volt Systems 1332-0093

Table 4. Spare Parts

29

LIMITED WARRANTY

(1) year from the date of receipt by the first user.

storage. Failure to perform recommended routine maintenance, alterations or repairs made other than in

accordance with PACE’s directions, or removal or alteration of identification plates in any way will void this

etc., except that heaters are normally warranted for a period of six (6) months from the date of receipt by the

approved by it at no charge to the user, or provide parts without charge for installation by the user in the field

at user’s expense and risk. User will be responsible for all costs of shipping equipment to PACE or other

(or local authorized PACE Distributor outside the U.S.) within a reasonable time of the expiration date of this

PACE warrants that this equipment will be free of defects in materials and workmanship for a period of one

This warranty does not cover repair or replacement required as a result of misuse, mishandling or improper

warranty. This warranty is available only to the first user, but the exclusions and limitations therein apply to all
persons and entities.

This warranty does not apply to consumable items, such as tips, filter elements, hoses, collection chambers

first user.
PACE MAKES NO OTHER WARRANTY, EXPRESSED OR IMPLIED, AND MAKES NO

WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
PACE will, at its option, repair or replace any defective equipment or parts at its facility or other location

warranty location for warranty service.
EXCEPT FOR THE REMEDY ABOVE DESCRIBED, UNLESS OTHERWISE REQUIRED BY

APPLICABLE LAW, PACE WILL HAVE NO OTHER OBLIGATION WITH REGARD TO ANY
BREACH OF WARRANTY OR OTHER CLAIM WITH RESPECT TO THE EQUIPMENT, OR
LIABILITY FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, OR INCIDENTAL LOSS OR
DAMAGE CAUSED BY OR OCCURRING IN CONNECTION WITH ANY OF THE EQUIPMENT.

To obtain warranty service, contact the appropriate PACE company listed below
PACE Inc. 9893 Brewers Court, Laurel, Maryland 20723-1990

Tel. [phone] (toll-free) Warranty Service FAX [phone]
PACE Europe Ltd. Sherbourne House Sherbourne Drive Tilbrook Milton Keynes

United Kingdom MK7 8HX
Tel. [phone] Warranty Service FAX [phone]

Do NOT return defective equipment or parts to PACE without obtaining prior authorization.
Any warranty or other claim with respect to the equipment must be made in writing and delivered to PACE

warranty. Sufficient evidence of purchase and date of receipt must also be included, otherwise user’s rights
under this warranty shall be deemed waived.

30