Sony CMD-C1, CMD-C8 Service manual

8

SERVICE MANUAL

CMD-C1/C

CMD-C1 : AEP Model

UK Model

AUS Model

CMD-C8 : China Model

SPECIFICATIONS

Signalling format GSM
Frequency range Transmit: 890 ~ 915 MHz

Receive: 935 ~ 960 MHz
GSM power class Class 4 (2 W)
SIM chip Pluggable mini SIM card
Display High resolution full graphics display

Resolution: 97 x 33 pixels

1 header line for icons

3 lines x 16 large characters
Channel spacing 200 kHz
Number of channels 124
Frequency stability Transmit frequency drift (synchronized)

< ± 0.1 p.p.m.
RF output power 2 W
Power requirements 3.5 V ~ 4.0 V (nominal)
Battery life Standby : up to 115h

Talk time : up to 5.5h

PORTABLE DIGITAL CELLULAR TELEPHONE

WITH ACCESSORIES

Operating temperature –10°C to +55°C
Accessories operating temperature 0°C to +45°C
Battery pack charging temperature 0°C to +40°C
Dimensions 98 mm x 60 mm x 26 mm
Weight 107 g
Volume 114 cm

3

Supplied accessories Power adaptor QN-C11AC (AEP), QN-C12AC (UK),

QN-C13AC (AUS), QN-C81AC (China)
Optional accessories Handsfree kit QN-C1HFK

Cigar lighter charger QN-C1CC
Design and specifications are subject to change without prior notice.

This appliance conforms with EEC Directive 87/308/EEC regarding interference suppression.

2

SECTION 1

OPERATING INSTRUCTIONS

The Basic Features of Your CMD-C1

The Jog Dial

TheJogDialprovidesone-handedoperationnavigatedby yourleft hand, freeing your right handforotheractivity
like taking notes, etc. Give the Jog Dial a quick turn in either direction in standby mode to spin through the main
menu options. With one simple press of the Jog Dial in standby mode (the Network Operator name appears on
the display), the Phonebook is at your fingertips. Press and hold the Jog Dial (for more than one second) to call
a Phonebook selection or number on the display.

Operation Function

Rotate Scrolls through menu options.

Press
(click)

Press and hold Dials the phone number selected.

MENU

Selects an option (highlighted) in the display.
Accepts an entry made by alphanumeric keys.

Exits from one menu to the previous one.

The Menu Key

In standby mode, press the Menu key and then use the Jog Dial to spin through the Main Menu with options to
change your phone settings and access different features. See also Menu Operation.

The Manner key

This is the key to good mobile phone manners. Press the Manner Key once to quickly turn the ringer to silent
mode to avoid disturbance. Just press twice and the ringer is restricted to a descrete single beep. To turn the
ringer on again, simply press the Manner Key again. During a call you can also press the Manner key once to

mutethemicrophone;press againtoturnonthemicrophone.Foryourreference, the optionsyouactivated
using the Manner Key are indicated by an icon in the display.

The Voice Mail Key

To speed dial your Voice Mail, press and hold the 1 Key to automatically dial your “personal answering service”
to listen to messages, etc. See also Phonebook, Voice Mail.

1

The keypad Lock

Your CMD-C1 can be locked to avoid involutary dialling or menu scrolling especially when carrying your mobile

MENU

phone. Simply press followed by the # key to lock your CMD-C1 keypad and even the Jog Dial restricting

MENU

any activity EXCEPT emergency calls (112). Simply repeat the key combination ( then # key) in order to
unlock your CMD-C1 again.

3

Icon Glossary

The Sony CMD-C1 lets you see at a glance if you have missed calls, have messages waiting, and the status of
options you have selected (like if you have diverted your phone or turned the ringer off). Sony has developed
the following icons to provide you with a quick overview of your mobile activity :

Icon Explanation

Keypad locked

SMS Message waiting (flashing = SMS memory storage full)

Voice Mail Notification

Battery strength (flashing = battery level low)

Network Signal strength

Network not available (no calls possible)

Incoming call

Option activated

Missed calles (Priority 1)

Limit Calls In/Out activated (Priority 2)

Limit Calls Out activated (Priority 2)

Limit Calls In activated (Priority 2)

Divert options activated (Priority 3)

Ringer switched to Silent Mode (Priority 5)

!

Ringer switched to Single Beep

Ringer switched to volume 0

Ringer Volume choices
Speaker Volume

Microphone Mute

4

Menu Overview

Rotate the Jog Dial or press the Menu key from standby mode to access the main menu :

DIVERT
(page 24)

If Not
Reachable

If No Reply
If Busy
All Calls
Clear All

MESSAGING
(page 26)

Read
Create
ServiceCentre
Settings
LocalArea Info

REDIAL
LIST
(page 32)

Last Calls
Received Calls
Missed Calls

CONTROL
(page 33)

Security
Network Services
Call Cost

PREFERENCES
(page 42)

Caller ID
Language
Ringer V olume
Ringer Tone
Any Key Answer
Key Click Sound
DTMF KeyTones
Illumination
Auto Redial
Auto Answer
1 Minute Beep
Factory Settings

5

SECTION 2

DISASSEMBLY

Important notes :

1.The IMEI sticker mounted on the main board (visible from the battery compartment) should under no
condition be removed. The IMEI number is the electronic identification of the hardware, it is also stored
electronically and at no time is a discrepancy between number on the sticker and number within the set
logic allowed.

2.The antenna unit can only be lifted off as a unit to allow access to parts underneath. The antenna itself
needs to be handled with care. Damage, deformation or incorrect mounting of the patch antenna can lead
to incorrect performance and even interference of the set.

1. Remove the battery cover and the battery. Note
that the SIM card is also located in this area.

3. The lower claws can be released by gently
pushing the upper case to left/right versus the
lower case.

2.Remove 4 screws inthebatterycompartment. The
upper and lower case are held by a number of
claws, positions are indicated.

4. Insert the hook release jig (p/n 9-948-370-20) in
the gap between upper and lower cosmetic, as
indicated in the picture.

6

5. Push the hook release jig gently to thelower side,
while holding the CMD-C1. In this way the hook
release jig is used as a lever. More clamps
between upper and lower case will now release
and the parts can be taken out.

6. The front cosmetic andback cosmetic can now be
separated, and the main board can be taken out.

7. The display unit can be lifted out. The LCD is
connected with a flex cable and the LCD support

8. Remove 6 screws located on the display side to
release the patch antenna.

is clamped onto themain board (2 clamps left and
right side).

9. Unsolder the antenna on the right side. The patch antenna assy can now be lifted off. fIt should be
considered as one non-serviceable and sensitive item.

7

10. Parts on the main board specified in the parts list can now be reached.

For reassembly, apply the disassembly procedure in reverse order.

8

SECTION 3

PROGRAMMING INSTRUCTIONS

1. Setup

The software programming setup requires a PC (386 type or higher), the Level Shifter (LS-1), Connection Cable
to the PC and the Level Shifter extension.

• Connect the RS 232 cable from the Level Shifter to the com-port of the PC (com 1 or com 2).

• Connect the Level Shifter extension between CMD-C1 and the Level Shifter.

• Connect the power supply to the Level Shifter.

No specific software installation is needed; only copy all the files to the PC.

PREPARATION FOR SOFTWARE UPDATE

PIN
JIG

1.LEVELSHIFTER LS - 1

2.INTERFACEADAPTER
WITHTHE PIN - JIG

2. Important notes

INTERFACE

ADAPTER

GSM conn.

LEVELSHIFTER

LS - 1

rs-232

• Before connecting the CMD−C1 to the Level Shifter, take out the battery of the CMD−C1; the CMD−C1

must be powered from the Level Shifter with the GSM-switch. All other switches are always in the
ON-position.

• The initial settings of the flash.exe program may not correspond with the normal correct settings. It is

highly advisable to check the settings first (see below).

9

3. Software setup

∗

Loading new software into the flash.

• Start the program flash.exe by double-clicking on its icon in the explorer.

• Select “File”/“Settings...” and check if the settings for the “Com Port”, the “Baud Rate” and the “Erase Mode”

are correct. Normally the “Load Options” do not have to be changed. The default values are :

Com Port: COM 1
Baud Rate: 115200
Load Options: Both
Erase Mode: Program Area, Smart Erase (!disable melody

area erase for normal software update)

After changing the settings, the new values are stored in the file “flash.ini” in the windows directory.

• Select “File”/“Open...” to select an S record file for downloading. The C1.SRE file contains the software for

C1. Any other .SRE file is either only needed for the program itself, or can be a melody file (see below).

• Press the “LOAD” button of the program.

• Power-on the mobile.

• Now the program runs automatically.

NOTE

– Please note that the CMD-C1 makes it possible to load only the different ringer melodies without

changing the rest of the software programs.

– For this procedure it is necessary to change the settings on the flash-loader for “EraseMode” to

MELODY AREA instead of PROGRAM AREA, then load the new file c1melody.sre.
– Remember to change the flash-loader settings back to PROGRAM AREA.
– ! Whenever performing software update or melody software update, please remember that the erase

settings (in the settings menu) should be correctly set.

10

SECTION 4

EXPLODED VIEW

11

SECTION 5

SPARE PARTS AND ACCESSORIES LIST

Ref. No. Part Number Description Comment

1 X 3376 296 1

X 3377 190 1
X 3377 192 1
X 3377 191 1

X 3377 193 1 Upper Case Metallic Red
2 3 031 795 01
3 3031 807 01
4 3 031 839 01
5 A 3647 481 A
6 3 031 803 02
7 3 031 804 01
8 1 529 191 11
9 1 542 381 11

10 1 759 436 21
11 3 031 801 01
12 1 418 057 21
13 1 785 460 31
14 1 785 698 21
15 1 695 320 21
16 1 785 461 21
17 1 528 950 11 Battery Pack
18 3 031 806 01
19 3 032 991 01

Instruction Manual

3 865 514 81

3 865 514 11

3 865 514 41

3 865 514 61

3 865 514 21

3 865 514 31

3 865 514 51

3 865 514 71

3 865 575 11

3 865 575 41

3 865 575 61

3 865 575 51

3 865 575 91 French

3 865 575 21

AC Power Supply

1 418 229 11

1 418 229 12

1 418 229 21

1 418 382 11

Jigs

9 948 320 40

9 948 370 20

9 948 320 60

9 948 360 30

Upper Case Orig. Grey
Upper Case Classic Silver
Upper Case Pearl White
Upper Case Metallic Blue

Lower Case
Lid, Battery
Cap, Antenna
LCD, Assy
Cushion LCD
Rubber Key
Speaker
Microphone
Ringer
Cushion, Ringer
Jog-Dial
DC Jack
I/O Connector
Battery Connector
SIM Connector

Screw 2,0x10
Screw 1,4x4,5

German CMD-C1 // F1 (CE1)
German / Italian CMD-C1 // SF1 (CE1)
Swedish/ Norwegian
Spanish / Portuguese
English
French / Dutch CMD-C1 // SF1 (CE1)
Danish / Finnish
Greek / Turkish
Czech / Polish
Chinese (Traditional)
Chinese (Simplified)
Arabic

Hungarian / Romanian

QN-C11AC Euro
QN-C12AC UK
QN-C13AC Australia
QN-C81AC Chinese

Level Shifter LS 1
Hook Release Jig
Level Shifter extension LS 1/C 1
Service Connection cradle

C1//F1
C1/SF1
C1/WF1

C1/LF1

C1/RF1

9-948-436-10

Sony Customer Relations & Service Europe

European Technical Support

English

Printed in Belgium

1999.02

Published by ETS

SERVICE MANUAL

CMD-C1/C8

CMD-C1 : AEP Model

UK Model

AUS Model

CMD-C8 : China Model

SPECIFICATIONS

Signalling format GSM
Frequency range Transmit: 890 ~ 915 MHz

Receive: 935 ~ 960 MHz
GSM power class Class 4 (2 W)
SIM chip Pluggable mini SIM card
Display High resolution full graphics display

Resolution: 97 x 33 pixels

1 header line for icons

3 lines x 16 large characters
Channel spacing 200 kHz
Number of channels 124
Frequency stability Transmit frequency drift (synchronized)

< ± 0.1 p.p.m.
RF output power 2 W
Power requirements 3.5 V ~ 4.0 V (nominal)
Battery life Standby : up to 115h

Talk time : up to 5.5h

REVISION

PORTABLE DIGITAL CELLULAR TELEPHONE

WITH ACCESSORIES

Operating temperature –10°C to +55°C
Accessories operating temperature 0°C to +45°C
Battery pack charging temperature 0°C to +40°C
Dimensions 98 mm x 60 mm x 26 mm
Weight 107 g
Volume 114 cm

3

Supplied accessories Power adaptor QN-C11AC (AEP), QN-C12AC (UK),

QN-C13AC (AUS), QN-C81AC (China)
Optional accessories Handsfree kit QN-C1HFK

Cigar lighter charger QN-C1CC
Design and specifications are subject to change without prior notice.

This appliance conforms with EEC Directive 87/308/EEC regarding interference suppression.

2

SECTION 1

OPERATING INSTRUCTIONS

The Basic Features of Your CMD-C1

The Jog Dial

TheJogDialprovidesone-handedoperationnavigatedby yourleft hand, freeing your right handforotheractivity
like taking notes, etc. Give the Jog Dial a quick turn in either direction in standby mode to spin through the main
menu options. With one simple press of the Jog Dial in standby mode (the Network Operator name appears on
the display), the Phonebook is at your fingertips. Press and hold the Jog Dial (for more than one second) to call
a Phonebook selection or number on the display.

Operation Function

Rotate Scrolls through menu options.

Press
(click)

Press and hold Dials the phone number selected.

MENU

Selects an option (highlighted) in the display.
Accepts an entry made by alphanumeric keys.

Exits from one menu to the previous one.

The Menu Key

In standby mode, press the Menu key and then use the Jog Dial to spin through the Main Menu with options to
change your phone settings and access different features. See also Menu Operation.

The Manner key

This is the key to good mobile phone manners. Press the Manner Key once to quickly turn the ringer to silent
mode to avoid disturbance. Just press twice and the ringer is restricted to a descrete single beep. To turn the
ringer on again, simply press the Manner Key again. During a call you can also press the Manner key once to

mutethe microphone;press againto turn on the microphone. Foryourreference, the optionsyouactivated
using the Manner Key are indicated by an icon in the display.

The Voice Mail Key

To speed dial your Voice Mail, press and hold the 1 Key to automatically dial your “personal answering service”
to listen to messages, etc. See also Phonebook, Voice Mail.

1

The keypad Lock

Your CMD-C1 can be locked to avoid involutary dialling or menu scrolling especially when carrying your mobile

MENU

phone. Simply press followed by the # key to lock your CMD-C1 keypad and even the Jog Dial restricting

MENU

any activity EXCEPT emergency calls (112). Simply repeat the key combination ( then # key) in order to
unlock your CMD-C1 again.

3

Icon Glossary

The Sony CMD-C1 lets you see at a glance if you have missed calls, have messages waiting, and the status of
options you have selected (like if you have diverted your phone or turned the ringer off). Sony has developed
the following icons to provide you with a quick overview of your mobile activity :

Icon Explanation

Keypad locked

SMS Message waiting (flashing = SMS memory storage full)

Voice Mail Notification

Battery strength (flashing = battery level low)

Network Signal strength

Network not available (no calls possible)

Incoming call

Option activated

Missed calles (Priority 1)

Limit Calls In/Out activated (Priority 2)

Limit Calls Out activated (Priority 2)

Limit Calls In activated (Priority 2)

Divert options activated (Priority 3)

Ringer switched to Silent Mode (Priority 5)

!

Ringer switched to Single Beep

Ringer switched to volume 0

Ringer Volume choices
Speaker Volume

Microphone Mute

4

Menu Overview

Rotate the Jog Dial or press the Menu key from standby mode to access the main menu :

DIVERT
(page 24)

If Not
Reachable

If No Reply
If Busy
All Calls
Clear All

MESSAGING
(page 26)

Read
Create
ServiceCentre
Settings
LocalArea Info

REDIAL
LIST
(page 32)

Last Calls
Received Calls
Missed Calls

CONTROL
(page 33)

Security
Network Services
Call Cost

PREFERENCES
(page 42)

Caller ID
Language
Ringer V olume
Ringer Tone
Any Key Answer
Key Click Sound
DTMF Key Tones
Illumination
Auto Redial
Auto Answer
1 Minute Beep
Factory Settings

5

SECTION 2

DISASSEMBLY

Important notes :

1.The IMEI sticker mounted on the main board (visible from the battery compartment) should under no condition be
removed. TheIMEI number is the electronic identification ofthehardware, it is also storedelectronically and at no time
is a discrepancy between number on the sticker and number within the set logic allowed.

2.The antenna unit can only be lifted off as a unit to allow access to parts underneath. The antenna itself needs to be
handled with care. Damage, deformation or incorrect mounting of the patch antennacanleadtoincorrect performance
and even interference of the set.

1. Remove the batterycover andthe battery. Note that the
SIM card is also located in this area.

3. The lower claws can be released by gently pushing the
upper case to left/right versus the lower case.

2.Remove 4 screws inthebatterycompartment. The
upper and lower case are held by a number of
claws, positions are indicated.

4. Insert the hook release jig (p/n 9-948-370-20) in
the gap between upper and lower cosmetic, as
indicated in the picture.

6

5. Push the hook release jig gentlyto the lowerside,while
holding the CMD-C1. In this way the hook release jig is
usedas a lever. More clampsbetween upper and lower
case will now release and the parts can be taken out.

7. The display unit can be lifted out. The LCD is connected with a flex cable and the LCD support is clamped onto the
main board (2 clamps left and right side).

6. The front cosmetic andback cosmetic can now be
separated, and the main board can be taken out.

8. Parts on the main board specified in the parts list can now be reached.

For reassembly, apply the disassembly procedure in reverse order.

7

SECTION 3

PROGRAMMING INSTRUCTIONS

1. Setup

The software programmingsetup requires a PC (386 type orhigher), the Level Shifter (LS-1), Connection Cable
to the PC and the Level Shifter extension.

• Connect the RS 232 cable from the Level Shifter to the com-port of the PC (com 1 or com 2).

• Connect the Level Shifter extension between CMD-C1 and the Level Shifter.

• Connect the power supply to the Level Shifter.

No specific software installation is needed; only copy all the files to the PC.

PREPARA TION FOR SOFTWARE UPDATE

1.LEVELSHIFTER LS - 1

2.INTERFACEADAPTER
WITHTHE PIN - JIG

PIN
JIG

INTERFACE

ADAPTER

GSM conn.

LEVELSHIFTER

LS - 1

rs-232

8

2. Important notes

• Before connecting the CMD−C1 to the Level Shifter, take out the battery of the CMD−C1; the CMD−C1

must be powered from the Level Shifter with the GSM-switch. All other switches are always in the
ON-position.

• The initial settings of the flash.exe program may not correspond with the normal correct settings. It is

highly advisable to check the settings first (see below).

3. Software setup

∗

Loading new software into the flash.

• Start the program flash.exe by double-clicking on its icon in the explorer.

• Select “File”/“Settings...” and check if the settings for the “Com Port”, the “Baud Rate” and the “Erase Mode”

are correct. Normally the “Load Options” do not have to be changed. The default values are :

Com Port: COM 1
Baud Rate: 115200
Load Options: Both
Erase Mode: Program Area, Smart Erase (!disable melody

area erase for normal software update)

After changing the settings, the new values are stored in the file “flash.ini” in the windows directory.

• Select “File”/“Open...” to select an S record file for downloading. The C1.SRE file contains the software for

C1. Any other .SRE file is either only needed for the program itself, or can be a melody file (see below).

• Press the “LOAD” button of the program.

• Power-on the mobile.

• Now the program runs automatically.

NOTE

– Please note that the CMD-C1 makes it possible to load only the different ringer melodies without

changing the rest of the software programs.

– For this procedure it is necessary to change the settings on the flash-loader for “EraseMode” to

MELODY AREA instead of PROGRAM AREA, then load the new file c1melody.sre.
– Remember to change the flash-loader settings back to PROGRAM AREA.
– ! Whenever performing software update or melody software update, please remember that the erase

settings (in the settings menu) should be correctly set.

9

4. Display contrast adjustment

1. The hardware set-up for this adjustment is the same as for the software update.

2. The level shifter power to the CMD-C1 should be off (GSM on/off toggle switch on LS1) while connecting the
CMD-C1. Once the hardware connection is made, the power can be set to ON.

3. The display contrast adjustment software is DOS-based, the program name is LDCONT.EXE.

4. When activating this program (either from within Windows or from the DOS prompt), it will suppose
automatically that you are using the COM1 port to connect from the PC to the level shifter. Any other COM
port can be used when starting from the DOS prompt and using the following parameter: LDCONT.EXE
–p<port>, where <port> is the number of the COM port you want to activate. For example: when using COM
port 2, the correct command to activate the program is: LDCONT.EXE –p2.

5. When the program is correctly set and activated, the following sequence will appear on the PC:

• Waiting for mobile

• LCD contrast : x

6.TheLCD contrast cannowbeadjusted with the up(↑)and down (↓) arrows of thePCkeyboardwhileobserving
the CMD-C1 display for the best setting. While changing the values from the PC, the contrast will change in
the CMD-C1 display.

7. When the best setting is found, the correct value will automatically be written into the CMD-C1 memory upon
exiting the program. It is therefore sufficient to leave the DOS prompt to write the value into the CMD-C1
memory.

NOTE

The distribution of GSM software is based upon the registration of the Level Shifter hardware.

(this message will appear for a few seconds only)
(x is a numeric value between 0 and 15)

10

SECTION 4

EXPLODED VIEW

11

SECTION 5

SPARE PARTS AND ACCESSORIES LIST

Ref. No. Part Number Description Comment

1 X 3376 296 1

X 3377 190 1
X 3377 191 1
X 3377 192 1
X 3377 193 1
X 3377 297 1
X 3377 579 1

X 3377 580 1
2 3 031 795 01
3 3 031 807 01
4 3 031 839 01
5 A 0602235 A

3 031 803 02
6 X 3376 297 1
7 3 031 804 01

3 031 804 11

3 031 804 21

3 031 804 31
8 1 529 191 11
9 1 542 381 11

10 1 759 436 21
11 3 031 801 01
12 1 418 057 22
13 1 785 460 32
14 1 793 148 22
15 1 695 320 21
17 1 528 950 11
18 3 031 806 01

Instruction Manual

3 865 514 81

3 865 514 11

3 865 514 41

3 865 514 61

3 865 514 21

3 865 514 31

3 865 514 51

3 865 514 71

3 865 575 11

3 865 575 41

3 865 575 61

3 865 575 51

3 865 514 91

3 865 575 21

AC Power Supply

1 418 229 11

1 418 229 12

1 418 229 21

1 418 382 11

Jigs

9 948 320 40

9 948 320 60

9 948 360 30

9 948 370 20

9 948 436 10

Upper Case Orig. Grey
Upper Case Classic Silver
Upper Case Metallic Blue
Upper Case Pearl White
Upper Case Metallic Red
Upper Case Classic Silver
Upper Case Pearl White
Upper Case Metallic Blue
Lower Case
Lid, Battery
Cap, Antenna
LCD Assy (Including cushion)
LCD cushion
Guide LCD, Assy
Rubber Key Dark version
Rubber Key Light version
Rubber Key SFR-Key Pad France, SIM LOCK C1/LF0 Dark version
Rubber Key SFR-Key Pad France, SIM LOCK C1/WF0 Light version
Speaker
Microphone
Ringer
Cushion, Ringer
Jog-Dial
DC Jack
I/O Connector
Battery Connector
Battery Pack QN-C1BP
Screw 2,0x10

German CMD-C1 // F1 (CE1)
German / Italian CMD-C1 // SF1 (CE1)
Swedish/ Norwegian
Spanish / Portuguese
English
French / Dutch CMD-C1 // SF1 (CE1)
Danish / Finnish
Greek / Turkish
Czech / Polish
Chinese (Traditional)
Chinese (Simplified)
Arabic
French (own manual from customer) CMD-C1 // LFO (CE1)

CMD-C1 // WFO (CE1)

Hungarian / Romanian

QN-C11AC Euro
QN-C12AC UK
QN-C13AC Australia
QN-C81AC Chinese

Level Shifter LS1
Pin-Jig with Interface LS1/C1 Level Shifter extension
Cradle Service-Test Connector
Hook Release Jig
Service Manual AEP /UK Model

C1//F1
C1/SF1

C1/LF1

C1/WF1

C1/RF1

C8/SC1
C8/WC1

C8/LC1

9-948-436-60

Sony Service Centre (Europe) N.V.

Technical & Customer Services Europe

English

Printed in Belgium

1999.05

Published by TCSE

SERVICE MANUAL

CMD-C1/C8

CMD-C1 : AEP Model

UK Model
AUS Model

CMD-C8 : China Model

SUPPLEMENT-1

Please file this supplement with the CMD-C1/C8 Service Manual (9-948-436-10).

Subject : Adjustments

PORTABLE DIGITAL CELLULAR TELEPHONE

WITH ACCESSORIES

Display contrast adjustment

1. The hardware set-up for this adjustment is the same as for the software update (see
page 9 of the Service Manual).

2. The level shifter power to the CMD-C1 should be off (GSM on/off toggle switch on
LS1) while connecting the CMD-C1. Once the hardware connection is made, the
power can be set to ON.

3. The display contrast adjustment software is DOS-based, the program name is
LDCONT.EXE.

4. When activating this program (either from within Windows or from the DOS prompt),
it will suppose automatically that you are using the COM1 port to connect from the
PC to the level shifter. Any other COM port can be used when starting from the DOS
prompt and using the following parameter: LDCONT.EXE –p<port>, where <port> is
the number of the COM port you want to activate. For example: when using COM
port 2, the correct command to activate the program is: LDCONT.EXE –p2.

5. When the program is correctly set and activated, the following sequence will appear
on the PC:

• Waiting for mobile

• LCD contrast : x

(this message will appear for a few seconds only)
(x is a numeric value between 0 and 15)

6. The LCD contrast can now be adjusted with the up (↑) and down ( ↓) arrows of the
PC keyboard while observing the CMD-C1 display for the best setting. While
changing the values from the PC, the contrast will change in the CMD-C1 display.

7. When the best setting is found, the correct value will automatically be written into the
CMD-C1 memory upon exiting the program. It is therefore sufficient to leave the
DOS prompt to write the value into the CMD-C1 memory.

NOTE

The distribution of GSM software is based upon the registration of the Level Shifter
hardware.

9-948-436-11

Sony

Customer Relations & Service Europe

European Technical Support

English

Printed in Belgium

© 1999.02

Published by ETS