WILLTEK 4100 User Manual

Series

Willtek 4100

Mobile Phone Tester

GSM 900 n E-GSM n GSM 1800 (PCN) n GSM 1900 (PCS)

Dual band GSM 900+1800

Multiband GSM 900+1800+1900

n GSM 900+1900

User Guide

Manual Version: 0312-341-A

Willtek 4100

Designations such as utility names, company names and trade names are not specially indicated in this manual, as they are all widely known. Such names may, however, be the property of companies or other such bodies.

This manual is subject to change at any time without notice. Errors and omis sions excepted.

© 1997 - 2003 Willtek Communications GmbH. All rights reserved. No part of this manual may be reproduced or transmitted in any form or by any means (printing, photocopying or any other method) without the express written per mission of Willtek.

Manual layout and text: Redaktion Interpreta, Munich, Germany

1-2

Willtek 4100

Chapter 1: GETTING STARTED

Preface ............................1-10

Operating modes ......................1-10

Important instructions ...................1-12

Proper operation ......................1-12

After unpacking .......................1-13

Key functions ........................1-14

Initial startup.........................1-16

Attaching the power supply unit ..............1-16

Start menu .........................1-16

Chapter 2: SETUP

Basic settings.........................2-2

Contrast ...........................2-2

Language ..........................2-3

Printer ............................2-4

Date and time ........................2-5

Header ............................2-6

PC interface .........................2-7

Choose the protocol .....................2-8

Sound ............................2-9

Self check..........................2-10

Accessing the menus ....................2-10

System information .....................2-10

Printer test .........................2-11

Keyboard test ........................2-12

Display test .........................2-12

Internal test .........................2-13

Preparing the tests .....................2-14

Installing the test SIM....................2-14

Background information: SIM................2-15

Attaching the test unit....................2-16

Connection via antenna ..................2-16

Points in favor .......................2-16

Points to note .......................2-16

Connection .........................2-17

Connection via the Universal Antenna Coupler ......2-18

Points to note ........................2-18

Connection .........................2-18

Cable-based connection ..................2-19

Points to note .......................2-19

Connection .........................2-19

1-3

Willtek 4100

Chapter 3: AUTOTEST

Overview ............................3-2

The influence of the user...................3-2

Running an AUTOTEST ...................3-3

A Standard AUTOTEST is carried out as follows ......3-4

Be prepared for input breaks.................3-4

When an AUTOTEST aborts.................3-4

The input breaks of a Standard AUTOTEST.........3-5

Lifting a tester block .....................3-6

Results of the AUTOTEST .................3-7

AUTOTEST PASSED ....................3-7

What to do if you are in doubt ................3-7

Softkey functions.......................3-7

AUTOTEST FAILED .....................3-8

Fault analysis ........................3-8

Sample AUTOTEST log (excerpt) .............3-10

Evaluating stored AUTOTESTs..............3-11

Selecting a stored log....................3-11

Softkey functions ......................3-12

Available capacity for storing AUTOTESTs ........3-12

Downloading logs to a PC .................3-12

Entering test parameters .................3-13

1. Assigning a name to a record ..............3-14

2. Selecting the radio system ................3-15

3. Selecting the connection type ..............3-15

4. Selecting the AUTOTEST ................3-16

At least one AUTOTEST ..................3-16

Background: AUTOTEST..................3-17

Standard AUTOTESTs ...................3-17

User-defined AUTOTESTs .................3-18

5. Channel selection ....................3-19

6. Entering compensation values ..............3-20

Background: signal attenuation...............3-20

Effect of the connection type ................3-21

Determining compensation values .............3-22

Cable-based connection ..................3-22

Universal Antenna Coupler .................3-22

Copying records ......................3-24

1-4

Chapter 4: FAULT FIND

Overview ............................4-2

The mode for experts ....................4-2

Accessing FAULT FIND mode ................4-3

Access with the Willtek 4107S ................4-3

Willtek 4100

FAULT FIND test preparation ...............4-4

Selecting the radio system .................4-4

Special considerations for dual-band systems........4-5

Special features of multiband systems............4-6

Testing multiband mobile phones ..............4-6

Selecting channels/RF power ................4-7

Entering channel numbers ..................4-7

Setting the RF power ....................4-8

Compensating for signal attenuation.............4-9

Compensation values ....................4-9

Installing the test SIM....................4-10

Connecting the mobile phone ...............4-10

This is what is tested ....................4-11

Test 1.0: Network identification and registration .....4-12

Problems with registration .................4-13

Problem solving.......................4-13

Test 2.0: MS CALL connection setup ..........4-14

Test 3.0: BS CALL connection setup ..........4-15

Test 4.0: Messages and measurements ........4-16

Test 4.1: Changing the voice channel ...........4-22

Test 4.2: Reducing the RF power (from the tester) ....4-23

Test 4.3: Changing power levels ..............4-24

Test 4.4: Clear down on the mobile phone ........4-25

Test 4.5: Clear down on the tester .............4-26

Test 5.0: Measuring the bit and frame error rate ......4-27

Test 6.0: Checking mobile phone identification .....4-29

Test 7.0: Speech testing ..................4-32

Test 8.0: Cell Broadcast test ...............4-34

Chapter 5: Additional Features

Introduction ..........................5-2

Additional features ......................5-2

Asynchronous Mode ....................5-3

Preparation and starting ...................5-4

Changing bands on multiband devices ..........5-5

Emission of a carrier signal .................5-5

Test results in Asynchronous Mode .............5-6

Remote Control........................5-8

Preparation..........................5-8

Starting remote mode ....................5-8

Special characters in SCPI .................5-9

SCPI syntax .........................5-9

Abbreviations ........................5-9

Command indicators .....................5-9

1-5

Willtek 4100

Composite commands ...................5-10

Parameters .........................5-10

Text .............................5-10

Numeric...........................5-10

Boolean ...........................5-11

Queries ...........................5-11

Result formats .......................5-11

Query ............................5-11

Settings and queries ....................5-12

Multiple measurement ...................5-12

Compatibility ........................5-12

SCPI command sets ....................5-13

Sample program ......................5-52

Quick reference .......................5-54

Chapter 6: APPENDIX

Technical data ........................6-2

Interfaces ...........................6-3

HD sub-26 socket ......................6-3

Mini-DIN socket .......................6-4

TNC socket .........................6-4

Printing.............................6-5

This is what you can print ..................6-5

Printer requirements .....................6-5

Connecting a printer .....................6-5

Testing the printer ......................6-6

Troubleshooting .......................6-6

Data transfer between the tester and the PC ......6-8

Where can I get the software? ................6-8

Installing the software ....................6-8

Preparation..........................6-9

The Program window ....................6-10

No data transfer? ......................6-11

Error messages.......................6-11

Performing a firmware update ...............6-12

Abortion during an update .................6-13

Copying MS TYPE records .................6-14

Exporting an MS TYPE list to PC..............6-14

Importing an MS TYPE list from the PC ..........6-15

Exporting test logs .....................6-16

Export options .......................6-16

Examples of exported test logs ...............6-20

Importing AUTOTESTs ...................6-21

Command line parameters .................6-23

General notes........................6-24

1-6

Willtek 4100

Upgrading your model ..................6-25

On-site upgrade or service centre?.............6-25

Updating the firmware ...................6-26

This is how to get your update package ..........6-26

To update you will need these ...............6-27

Contents of the update package ..............6-27

Performing the update ...................6-27

The code used in log listings ...............6-28

Troubleshooting ......................6-33

Willtek 4100 Timeline....................6-35

Accessories and options .................6-38

Standard accessories ...................6-38

Extra accessories .....................6-38

Options ...........................6-39

RF adapters ........................6-40

Overview GSM threshold values .............6-41

1-7

Willtek 4100

1-8

Willtek 4100

GETTING

STARTED

1-9

Preface Willtek 4100

Preface

Thank you for choosing a model in the Willtek 4100 series. The equipment will give you valuable assistance in functional testing and troubleshooting on GSM mobile phones.

Model Frequency band Network

GSM 900/1800/1900 Single band

Willtek 4107 Willtek 4107L Willtek 4107S

0,9/1,8/1,9 GHz

Willtek 4107S The Willtek 4107S offers a number of additional

features compared with the Willtek 4107 (see chapter 5 for details). The S version can be identified by the type label and the model name in the start menu.

Willtek 4107L Special inexpensive model only available bundled with

other products (eg 4192 GSM Phone Checker software). The same range of functions as the Willtek 4107, except that FAULT FIND mode is not available. This model can, however, be remotely controlled (see chapter 5). Please contact our Sales department for details.

E-GSM Single band GSM 900+1800 Dual band

GSM 900+1900 Dual band GSM 900+1800+1900 Multiband

1-10

Operating modes

[AUTOTEST] Fast and accurate full testing of a mobile phone with an

overall assessment of PASSED (mobile phone OK) or FAILED (mobile phone defective). Largely automatic testing requiring no system expertise on the part of the user.

[FAULT_FIND] Operating mode for error location on defective mobile

phones (not available for Willtek 4107L). Selective performance of individual tests. Displays measurements for assessment by experienced users.

Willtek 4100 Preface

This User Guide is applicable to all models in the Willtek 4100 series. The generic name 4100 is used

Do you speak English? The testers have a display which can show text either

whenever the Guide refers to features which are not specific to a particular model.

in English or in some other language. This Guide assumes that you have selected English, in which case the illustrations and instructions will match up with what you see on your tester's display.

If some other language is selected, the Guide and the display no longer match up. In that case either translate what the Guide says into the other language or switch the language to English for a short period (see also page 2-3).

1-11

Important instructions Willtek 4100

Important instructions

Proper operation

AC power Permissible line voltage: 100 V through 240 V

(AC voltage; 47 Hz through 63 Hz). The power supply unit automatically adapts to the line voltage.

Use for intended purpose only Use your Willtek 4100 only for its intended purpose for

function testing and repairs on the radio telephones of a GSM mobile radio system.

Ambient conditions Store and operate your Willtek 4100 only in a dry and

dust-free environment. Operate your Willtek 4100 only in the permissible temperature range of 15 °C through 35 °C. Observe the permissible storage temperatures (see Appendix: Technical data).

Breakable display Do not press down on the display.

Air circulation Keep the air vents free of obstruction.

Electromagnetic compatibility The device emits RF radiation. For this reason, do not

operate it in EMC-sensitive environments if this might result in danger (e.g. when traveling in automobiles or during flights). The EMC and Safety directives to which the device conforms are listed in the Declaration of EU Conformity (see Chapter 6).

Do not open Do not make technical modifications to the device or its

accessories. Do not open the device. There are no parts inside it which require maintenance or disposal. Do not open the device, otherwise you will lose your claim to warranty.

Original accessories only Use original accessories only.

No solvents Do not use agents which contain solvents to clean the

equipment casing.

1-12

Willtek 4100 Important instructions

Handling Avoid the following during operation and storage:

- strong direct sunlight

- vibrations, heavy impacts

- ingress of liquids or small objects into the device

- bending of the RF adapter cable

- contamination of the electrical contacts

After unpacking

Do not throw the packaging of your Willtek 4100 away.

It will make shipment easier if you want to have your model upgraded later (see also page 6-25).

Check that the delivery is complete:

Standard items supplied

M 101 2XX 1x M 860 188 1 x Test SIM, plug-in format M 295 012 1 x Getting Started manual M 897 055 1 x CD with User Guide in PDF format M 860 105 1 x Power supply unit with power cord and connecting

M 860 409 1 x RF adapter cable

Willtek 4100

cable

Options/extra accessories For a list of useful options and extra accessories refer

to Chapter 6.

Check that the unit is undamaged:

Do not attempt to operate a WIlltek 4100 if there is obvious damage to the device, the power

supply unit or the accessories. Retain the packaging and contact the office who supplied the equipment.

1-13

Important instructions Willtek 4100

Key functions

The cursor keys have two functions: selecting menu items

when entering numbers/letters: moving to the required

location

{F1} {F2} {F3} Softkeys: The current function of a key is assigned by

the currently visible menu. If no such assignment has been made, the softkey is irrelevant.

1-14

Willtek 4100 Important instructions

[AUTOTEST] Switches to AUTOTEST mode (quick test of mobile

phones)

[FAULT_FIND] Switches to FAULT FIND mode (troubleshooting – not

available for Willtek 4107L)

[TEST_RESULTS] Displays a list of AUTOTEST logs you have stored (e.g.

if you want to print a certain log)

[ENTER] The [ENTER] key has three functions:

confirming input

opening a submenu

launching a program

{1abc]...[9__yz} The number-and-letter keys have the following

functions: entering the numbers 1 through 9 (e.g. phone numbers)

l l entering the letters A through Z (e.g. comments)

[0_space_] Enters the digit 0 or a space

[ESCAPE] The [ESCAPE] key has two functions:

returning to the next menu up

aborting the current test

[SETUP] Calls the setup menu (for basic parameter settings

such as language and contrast)

[HELP] Calls up brief explanations of the currently visible menu

On/off button

1-15

Initial startup Willtek 4100

Initial startup

All you need to do to start up your Willtek 4100 the first time round is connect it to the power via the accompanying power supply unit.

Attaching the power supply unit

! Plug the 8-pin connector coming from the power supply

unit into the matching socket on your Willtek 4100.

When plugging the connector into the socket, be sure to observe the mechanical coding on the

socket and the connector. If these do not match, the connector will not fit into the socket. Do not use force! Use only the original power supply unit.

Attach power supply unit here

Start menu of the Willtek 4107S.

" Connect the power supply unit to the wall power outlet.

§ Press the on/off button to switch your Willtek 4100 on.

n Start menu

Immediately after being switched on, the Willtek 4100 briefly displays an initialization menu (in this period among other things the operability of the device is checked).

The tester is fitted with a maintenance-free fan in order to keep the semiconductor components cool. The level of noise produced by the fan is normal.

Once you see the start menu (picture on left), the device is ready for use.

The first time you start up the device, you should at this point press the [SETUP] key to adapt the basic configuration of your Willtek 4100 to match your specific requirements (see Chapter 2).

1-16

Willtek 4100

SETUP

2-1

Basic settings Willtek 4100

Basic settings

Contrast

[SETUP]

As a rule, the basic settings need only be configured once during initial startup. A powerful capacitor ensures that the settings and the stored test result are preserved when your Willtek 4100 is off.

The tester should be on for about 4 hours at

least every 14 days (for capacitor charging) to ensure that no data is lost.

[SETUP] + Adjust contrast + [ENTER]

To adjust the readability of the display to the ambient conditions.

! Using the cursor keys, alter the contrast to produce

optimum readability from the normal viewing angle.

" Return with [ESCAPE].

2-2

Willtek 4100 Basic settings

Language

[SETUP] + Language + [ENTER]

To select the language in which the display shows text.

! Select one of the languages offered using the cursor

keys.

" Confirm your selection with [ENTER].

§ Return with [ESCAPE].

The languages currently offered are English,

German, Italian and French. Other languages are being prepared, and these will be made available in the form of a firmware update (see page 6-26).

2-3

Basic settings Willtek 4100

Printer

Press the {PRINT} key to print a test page using the current settings (see also page 6-6).

Example of page length

Lines per page = 59 Free lines at top = 9 Nine lines will remain blank at the top of the page. This means that a total of 50 lines will be available on each page for the test results (59 - 9). Whether these will fill the entire page or not depends to a large extent on the font settings on the printer, since the Willtek 4100 just outputs the characters.

The way in which the characters appear on the paper (font, size, line feeds) is determined by the printer on the basis of the settings made on the printer. This means that you can only change the appearance of the test results by changing the printer's settings.

[SETUP] + Printer + [ENTER]

To select a printer for outputting test results.

! Using the cursor keys, select the manufacturer of your

printer (EPSON or HP). Printers from other manufacturers can also be used, provided that they have an HP or Epson emulation available. Select ASCII if your printer is neither Epson nor HP-compatible.

All printers which do not require the use of a

driver under DOS can be used directly. More recent Windows printers are therefore generally unsuitable. Printers of this type can, however, be used to print exported test logs from the PC (see page 6-16).

" Confirm your selection with [ENTER].

Setting the page length

The value you specify for Lines per page determines the number of printed lines per page (including blank lines at the top of the page) when you print test results. Once this number of lines is reached on the printout, the tester issues a form feed. The specification you make for Free lines at top sets the number of blank lines at the top of the page (if, for instance you want to avoid overwriting a letter header).

! Move to the entry fields with the cursor keys, enter the

required value and confirm every entry with [ENTER].

" Return with [ESCAPE].

For information on connecting a printer to your

Willtek 4100 and on printing test results, refer to page 6-5.

2-4

Willtek 4100 Basic settings

Date and time

Changes to the date format are reflected by swapping of the first two values in the "Date" line.

Each time you confirm a setting you can either go on to configure another setting or press [ESCAPE] to quit the menu.

[SETUP] + Date and time + [ENTER]

To set the date and time (shown on the start menu and printed on test results).

Date format

! Using the cursor keys, select the date format you

require (shown at the bottom of the display):

DD/MM/YY = day/month/year MM/DD/YY = month/day/year

" Confirm your selection with [ENTER].

Time

! Using the cursor keys, select the "Time" line. " Enter the current time in 24-hour format (comparable to

entering a 6-digit number on a pocket calculator). Example: 10:32 Input: 103200

§ Confirm your input with [ENTER].

Date

! Using the cursor keys, select the "Date" line. " Enter the current date in the selected date format

(comparable to entering a 6-digit number on a pocket calculator). Example: June 14, 1997 Input: 140697 or 061497

§ Confirm your input with [ENTER].

Return with [ESCAPE].

2-5

Basic settings Willtek 4100

Header

Example {1_abc]

Repeated pressing of the {1_abc] key causes the following characters to be entered at the cursor position:

1st press = A 2nd press = B 3rd press = C 4th press = 1 5th press = A 6th press = B

etc.

[SETUP] + User definitions + [ENTER]

To enter the text that you want to appear in the header on printed tested reports (e.g. user/company).

! Using the cursor keys, select the required input line. " Enter text letter by letter (digits are also acceptable)

using the keys on the numeric keypad. Repeated pressing of a number key first displays all the letters assigned to that key and then the digit:

Automatic text entry: Avoid pauses between

–

selecting characters. If you pause for more than approx. 1 second between selecting two characters, the character currently visible is used and the cursor moves to the next entry position.

– Corrections: Use the left or right cursor key to

position onto the incorrect character and then overwrite the character.

–

Use the [0_space] key to enter spaces.

§ Confirm your input with [ENTER]. $ Using the cursor keys, move to the second input line

and enter text – or return with [ESCAPE].

2-6

Willtek 4100 Basic settings

PC interface

Why data communication?

Setting up a data communication link between a PC and your Willtek 4100 is

not difficult, but it can be really useful! For example, you are able to download the latest firmware versions from the Internet, and feed them into your Willtek 4100, or selectively

upload user-specific AUTOTESTs and limit values that are geared to specific models of mobile phone. Willtek also has the right software for your data communication requirements (some of which are optionally available).

[SETUP] + Serial port + [ENTER]

To set the baud rate (bit/s) for serial data communication between PC and Willtek 4100, and to select the type of communication line.

! Using the cursor keys, select the required baud rate.

The higher the baud rate, the shorter the transmission time. On older PCs it may be necessary to select one of the lower rates to ensure error-free data transmission. Further data communication parameters are permanently set (in the background) to:

8 data bits – no parity – 1 stop bit

" Confirm your selection with [ENTER].

§ If you are using one of the original cables for serial data

communications (extra accessories: Serial adapter cable or Universal adapter cable), please select the entry Normal under RXTX lines using the cursor keys. If you are using other cables (e.g. extension cables), lines RXD and TXD can be crossed (Pin 2 and Pin 3, see also page 6-3). In this case, please select Crossed.

$ Confirm your selection with [ENTER]. % Return with [ESCAPE].

The values set for the serial interface (COM port)

on the PC must be the same as those set on the Willtek 4100. If the PC also asks you about the (transmission) protocol, the (transmission) protocol, select "NONE". For instructions on setting the baud rate of the serial interfaces (RS-232-C) and the other parameters on your PC, refer to the manual for your operating system (DOS, Windows 3.xx, Windows 95).

2-7

Basic settings Willtek 4100

Choose the protocol

When a tester is under remote control, the transfer protocol ensures error free transfer of data between the PC and the tester (handshaking). You can choose between one software protocol and one hardware protocol (Willtek 4107S only).

X-ON / X-OFF Choose this software protocol if the

RTS and CTS lines are missing in the cable connecting the PC and the tester (see also page 6-3).

RTS / CTS If you are using a fully-wired cable (ori

ginal Willtek accessories), you should choose this fast hardware protocol in preference to the slower software protocol.

On the PC, the same protocol must be set for the

serial interface (COM port) used as for the Willtek 4107S.

The protocol you set only takes effect when the tester is under remote control and does not interfere with data transfer using other protocols (e.g. when loading a firmware update).

2-8

Willtek 4100 Basic settings

Sound

[SETUP] + Sound + [ENTER]

Enable or disable the sounds used by the Willtek 4100 to signal special operating status (e.g. when a key is pressed, when an error occurs or when the device is ready).

! Using the cursor keys, select the required setting.

None Sounds are always active. On Autotest Sounds are deactivated during an

AUTOTEST.

All Sounds Sounds are always deactivated.

" Confirm your selection with [ENTER]

2-9

Basic settings Willtek 4100

Self check

[SETUP] + Self check + [ENTER]

The Willtek 4100 checks its hardware modules and indicates whether they are working correctly. It also displays information on the version status of individual modules.

Accessing the menus

Once you see the SELF CHECK menu on the display, access to the submenus always follows the same pattern:

! Use the cursor keys to select the menu you require. " Confirm your selection with [ENTER]. The display then

shows the menu you have selected. On some menus you can then use softkeys to start self checks.

§ Return with [ESCAPE].

System information

[SETUP] + Self check + [ENTER] + System info + [ENTER]

The SYSTEM INFORMATION menu shows the following information:

–

the serial number of the tester

–

the model number

–

the firmware version number

–

the date and time of the creation of the firmware at Willtek

–

details relating to the hardware level of the device

2-10

Please have the information on this menu

ready when contacting Willtek for product support (Press {PRINT} to start printing the menu).

Willtek 4100 Basic settings

Printer test

[SETUP] + Self check + [ENTER] + Printer test + [ENTER]

To test the printer.

! Attach your Willtek 4100 (26-pin socket) to the printer,

typically using the Universal adapter cable (extra accessory).

" Press {PRINT} to start the printer test.

If your printer outputs the three lines shown on the left,

test results will also be printed correctly. Please refer to page 6-5 if the printer does not respond

or responds incorrectly.

§ Return with [ESCAPE].

2-11

Basic settings Willtek 4100

Keyboard test

[SETUP] + Self check + [ENTER] + Keyboard test + [ENTER]

To test the keypad.

When you call this menu, the keyboard test starts automatically.

! Press all the keys on your Willtek 4100 in succession.

If the display reports the designation of the key you

press, the key is OK. Numbers are written out (e.g. FIVE).

If the display does not acknowledge a keypress, the

key is defective (e.g. corroded contacts following ingress of liquid). In this case consult your sales partner.

" Return with [ESCAPE].

Display test

[SETUP] + Self check + [ENTER] + Display test + [ENTER]

To test the liquid crystal display.

When you call this menu, the display test starts automatically.

The display is divided into two areas which alternate between white, gray and black. These areas should show no obvious dots or stripes.

If, for instance, you can see black dots or stripes in a white area, the display is faulty. In this case, consult your local Willtek sales office or authorized Distributor.

2-12

Return with [ESCAPE].

Willtek 4100 Basic settings

Internal test

[SETUP] + Self check + [ENTER] + Internal test + [ENTER]

To run an internal test on important modules and supply voltages.

! Press the {ONESHOT} softkey to start a single test run or

{CONT.} to start continuous testing (press {STOP} to

abort). PASS indicates that a test has been passed, FAIL reports an error. With continuous testing, the

number of tests carried out and the total number of errors detected are also reported.

Errors reported by tests may also be due to external

factors (such as major glitches in the line voltage). In such cases repeat the test. If the errors recur, consult your sales partner.

" Return with [ESCAPE]. Use {STOP} to abort continuous

testing first.

2-13

Preparing the tests Willtek 4100

Preparing the tests

Preparations are identical for the tests in AUTOTEST and FAULT FIND modes. They involve only two steps:

insertion of the test SIM in the test unit,

connection of the test unit to your Willtek 4100.

Installing the test SIM

Make sure that you insert the test SIM in the mobile phone before carrying out an AUTOTEST. This is because during the test, the Willtek 4100 will attempt to perform measurements which are not generally permitted by original SIMs. The test SIM is not absolutely necessary for FAULT FIND mode, although it is useful.

! Make sure the mobile phone is switched off.

2-14

Observe the equipment manufacturer's handling instructions.

" Replace the original SIM with the test SIM. Plug-in

SIMs are usually hidden behind a small flap that you see when you take out the battery.

+ 165 hidden pages

WILLTEK 4100 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents