Sony CMD-C1 Service Manual page 26

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
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
(this message will appear for a few seconds only)
(x is a numeric value between 0 and 15)
Sony
Customer Relations & Service Europe
European Technical Support
English
Printed in Belgium
© 1999.02
Published by ETS