PACE ST 325 Service Manual

Operation and Maintenance Manual for the

SODRTEK

ST 325 Digital Convective

Soldering/Desoldering System

P/N 5050-0537

TITLE PAGE

General Information .......................................................................................................3

Introduction...........................................................................................................3

Microprocessor Control........................................................................................3

ST 350 Precision Reflow Head............................................................................3

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

Parts Identification................................................................................................5

Safety.............................................................................................................................7

Safety Guidelines.................................................................................................7

Usage Warnings/Cautions....................................................................................7

Servicing Precautions...........................................................................................8

System Set-Up...............................................................................................................8

Setup....................................................................................................................8

Vacuum Pick ........................................................................................................8

Handpiece Stand..................................................................................................9

Quickfit Nozzle Adapter........................................................................................9

Nozzle Selection..................................................................................................10

Nozzle Changeout.........................................................................................................11

Removal ..............................................................................................................11

Installation ...........................................................................................................11

Definitions......................................................................................................................11

System Power Up .........................................................................................................12

Set Up Mode.................................................................................................................12

Automatic Calibration....................................................................................................13

Operation.......................................................................................................................14

Password.............................................................................................................14

Front Panel Selections........................................................................................14

Pik-Vak Operation ...............................................................................................15

Component Removal; Manual Mode...................................................................15

Component Installation; Manual Mode................................................................17

Timed Removal...................................................................................................19

Timed Install........................................................................................................20

PC Control.....................................................................................................................23

Memory................................................................................................................23

Save ....................................................................................................................23

Recall...................................................................................................................23

Process Development...................................................................................................24

Profile Development............................................................................................24

General Process Guidelines .........................................................................................27

Board Preparation...............................................................................................27

Component Positioning.......................................................................................28

Preheating...........................................................................................................28

Corrective Maintenance................................................................................................29

Display Error Messages......................................................................................29

Power Source/Handpiece....................................................................................29

Packing List...................................................................................................................30

Spare Parts...................................................................................................................30

Service ..........................................................................................................................30

“SODRTEK by PACE” LIMITED WARRANTY STATEMENT.......................................31

Contact Us.....................................................................................................................32

General Information

Introduction

Thank you for purchasing the PACE SODRTEK

model ST 325 Analog Convective Soldering/Desoldering System. This manual will provide you with the information necessary to properly set up, operate, and maintain the ST 325. Please read this manual thoroughly before using the unit. The ST 325 unit is a complete system designed for hot air removal and installation of SMD components, including Ball Grid Arrays (BGAs). The following key features allow process controlled placement and reflow of BGAs and SMD components. The ST 325 will store up to 20 profiles on its own. A PC can be used to store additional profiles and to collect the thermocouple data.

Microprocessor Control

The microprocessor system offers precision control of temperature (closed-loop control), cycle time (adjustable by one second increments), and blower speed provides consistent, repeatable results in successive reflow operations. Utilizing the Quiet Flo (low noise) turbine blower, pressure/flow rate is easily controlled and maintained at optimum levels for the particular task. A multi-level password lock-out prevents unauthorized changes and an audible countdo wn timer indicates end of cycle.

ST 325 Handpiece

The user-friendly ST 325 static-safe handpiece incorporates a powerful heater and has easy-access heat cycle and vacuum pick switches on the handle. A built-in, self-adjusting vacuum pick has a pushpull action, allowing components to be lifted automatically after solder reflow. When utilized with the ST 325 System work platform, the handpiece is easily converted to a precision reflow head.

The ST 325 unit is available in either the 115 VAC or 230 VAC version. The 115 VAC version system bears the FCC Conformity Marking which assures the user that it conforms to all the requirements of FCC Emission Control Standard, Title 47, Subpart B, Class A. This standard is designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. The 230 VAC version system bears the CE Conformity Marking which assures the user that it conforms to all the requirements of (EU) directive EMC 89/336/EEC & 73/23/EEC.

Specifications

ST 325 - Operates on 97-127 VAC, 60 Hz (115 VAC version) 575 Watts maximum at 120 VAC, 60 Hz

ST 325E - Operates on 197-264 VAC, 50 Hz (230 VAC version) 575 Watts maximum at 230 VAC, 50 Hz

Air Temperature Range - 149°C - 482°C (300°F - 900°F) Timing Control - 10 to 999 seconds with 1 second resolution. (does not include preheat time) Blower Air Flow Rate (measured at heater) - 20 SLPM (0.7 SCFM) minimum at highest speed (9).

- 5 SLPM (0.18 SCFM) minimum at lowest speed (1). Vacuum (at Pik-Vac Port) - 7.6 cm Hg. (3 in. Hg.) minimum. NOTE: The ST 325 is designed for cyclical usage. Attempts to use in continuous operations by

taping the handpiece Cycle Switch or other methods may void Blower Assembly warranty.

Component Capacity - (maximum size) - 5.1 cm x 5.1 cm (2” x 2”)

Physical Parameters

Size - 133 mm H x 260 mm W x 248 mm D (5.25” H x 10.25” W x 9.75” D) Unit Weight - 4.3 Kg. (9.5 lbs.)

Parts Identification

LCD Display

Power Switch

Fuse

AC Power Receptacle Earth Ground Receptacle

Menu Key

Scroll Keys

Select Key

Pre-Heater Receptacle

K-type Thermocouple Receptacle

LoFlo Vacuum

Port

(ST 450)

LoFlo Pump Switch

RS 232 PC Input

Remote Controller

Receptacle

Vacuum Pick Switch - Activates & deactivates vacuum pump supply to the Vacuum Pick Assembly. Switch must be depressed for a period o

0.5 second before circuit deactivation; activation is immediate.

VACUUM PICK ADJUST CONTROL – Provides adjustment fo height of Vacuum Pick Assembly (& Vacuum Cup). Turn clockwise to raise pick or counterclockwise to lower pick.

CYCLE SWITCH - Activates reflow cycle (heat & airflow). Switch must be held to maintain activation in Manual Mode; in Timed & Program Modes, switch is pressed & released to initiate set cycle time. Switch can be used to abort cycle in Timed or Program Mode operation.

HEAT SHIELD-Protects the operator from unintentional contact with the heater.

QUICKFIT NOZZLE ADAPTER - Allows quick nozzle attachment and release.

NOZZLE ASSEMBLY - Directs heated air from the heate assembly to the solder joint areas for soldering o desoldering of components. Nozzles are optional parts ordered for a specific application.

VACUUM PICK ASSEMBLY - Provides a means to lift o place components.

VACUUM CUP - Provides positive holding of components for positioning during the replacement process and for lifting of the component during the removal process.

Safety

Safety Guidelines

The following are safety precautions that personnel must understand and follow when using or servicing this product.

“NOTE”

Used to indicate a statement of company recommendation or policy. The message may relate directly or indirectly to the safety of personnel or protection of property. NOTE is not associated directly with a hazard or hazardous situation and is not used in place of "CAUTION", "WARNING" or "DANGER".

“CAUTION”

Used to indicate a hazardous situation, which may result in minor or moderate injury. May also be used to alert personnel to conditions, procedures and practices which, if not observed, could result in damage to or destruction of the product or other equipment.

“WARNING”

Used to define additional information that if not closely followed might result in serious damage to equipment and represent a potential for serious personnel injury.

“DANGER”

Defines additional information that if not closely followed might result in severe personnel injury or death. Danger is not used for property damage unless personal injury risk is present.

Usage Warnings/Cautions

WARNINGS

1. A fire hazard may arise if the ST 325 is used improperly.

2. Do not use the ST 325 in the presence of an explosive atmosphere.

3. Be careful when using the ST 325 in places where there are combustible materials. Heat may be conducted to combustible materials which are out of sight.

4. Do not apply heat from the ST 325 to one place for a long time.

5. Do not leave the ST 325 unattended while powered on.

CAUTIONS

1. The ST 325 handpiece heater assembly housing and any installed nozzle are hot when the system is being cycled and for a period of time thereafter. DO NOT touch either the heater assembly housing, nozzle or direct heated air stream. Severe burns may result!

2. Utilize all standard electrical safety precautions when using this or any other electrical equipment.

3. Always use the ST 325 with the Heat Shield installed. The Heat Shield helps to prevent unintentional contact with the heater.

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

4. 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.

Servicing Precautions

DANGERS

POTENTIAL SHOCK HAZARD - Repair procedures performed on this product should be

performed by qualified service personnel only. Line voltage parts will be exposed when equipment is disassembled. Service personnel must avoid contact with these parts when troubleshooting.

Precautions

The following are general safety precautions which personnel must understa nd and follow when using or servicing this product. These precautions may or may not be included elsewhere in this manual.

Safety

Electrical Requirements

The ST 325 unit draws approximately 575 Watts, which is listed on the nameplate on the power source rear panel. A separate, dedicated AC supply line circuit may be required to adequately power the unit/system. If your power outlet cannot provide suitable power, arrange for a qualified, licensed electrician to install one for you.

System Set-Up

Set up the ST 325 system using the following steps and associated drawings.

1. Remove the ST 325 from its shipping container(s). Store the shipping container(s) in a convenient location. Reuse of these containers will prevent damage if you ship or store the system.

2. Set the ST 325 unit on a convenient workbench.

3. Place the POWER Switch (on power source front panel) in the "OFF" or "0" position.

4. Inspect all system components to check for shipping damage and to ensure that all purchased components (standard and options) are present. Use the drawings provided in the following pages as a guide for checking the parts that come with the unit.

Vacuum Pick

Set-Up

1. Locate the Pik-Vac (P/N 7027-0001-P1) and the Vacuum Cup Kit (P/N 6993-0154) supplied with the system.

2. Attach the ridged end of a male quick connect hose mount Fitting to each end of the Air Hose.

3. Attach one male quick connect hose Fitting (with attached Air Hose) to the rear of the Pik-Vac Handpiece.

4. Insert the other male quick connect hose Fitting (with attached Air Hose) into the LoFlo Vacuum Port.

5. Attach the Metal Vacuum Tip, with the appropriate vacuum cup, to the end of the Pik-Vac Handpiece.

Handpiece Stand

Using the supplied hardware, attach the Handpiece Retainer and the Mounting Bracket as shown.

QuickFit Nozzle Adapter

The ST 325 QuickFit Adapter allows you to easily change out any PACE ST 325 Nozzle. Attach the adapter to the handpiece heater using the following instructions.

1. Insert the QuickFit Adapter into the end of the handpiece heater as shown.

2. Position the QuickFit Adapter so the Line on the heater is aligned with one of the 3 lines (1 long & 2 short lines) on the Locking Collar. Tighten Collar Locking Screw to secure adapter in position.

Handpiece Retainer

Mounting Bracket

Nozzle Selection

Selection of the proper Nozzle is essential for achieving a quality component removal or installation. Each ST 325 Nozzle is designed to properly direct the heated air. Custom nozzles are available upon request. ST 325 Nozzles are available in 4 basic configurations.

Vented Air Nozzles (V-A-N)

Are used for removal/replacement of BGA components.

Box Nozzles

Used for removal/replacement of surface mount components having solder connections on 4 sides of the component (e.g., QFPs & PLCCs).

Pattern Nozzles

Used for removal/replacement of surface mount components having solder connections on 2 sides of the component (e.g., SOICs).

Single Jet Nozzles

Available in straight, curved and flat end versions, these nozzles are used for removal/replacement of small surface mount components (e.g., chip components), small QFPs, Land Grid Arrays (e.g., those used on pagers & cellular telephones) or for reflowing solder on single solder connections.

Template Selection

Alignment Templates are used as an aid in aligning V-A-N Nozzles to the PCB Assembly when installing Ball Grid Arrays (BGAs). The I.D. (Inside Dimension) of the template should match the perimeter of the BGA land pattern.

Vacuum Cup Selection

Selection of the proper size vacuum cup is important for achieving an adequate holding force for each component. The cup selected should be as large as possible without exceeding the body size of the component. Vacuum cups are consumable items which deteriorate over a period of time.

+ 22 hidden pages

PACE ST 325 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Safety Guidelines

“CAUTION”

WARNINGS