JVC AV-29WX14/G Service Manual page 10

3.2 REPLACEMENT OF MEMORY IC
3.2.1 MEMORY IC
This TV uses the following memory IC.
Memory IC: IC702 on MAIN PWB
The memory IC memorizes data for correctly operating the
video and deflection circuits. When replacing the memory
IC, be sure to use the same type IC written with the initial
values of data. In other words, use the specific IC listed in
"PRINTED WIRING BOARD PARTS LIST". For its mounting
location, refer to "ADJUSTMENT LOCATIONS".
3.2.2 PROCEDURE FOR REPLACING MEMORY IC
1. Power off
Switch the power off and unplug the power cord from
the wall outlet.
2. Replacing the memory IC
Replace the memory IC with new one. Be sure to use
the memory IC written with the initial data values.
3. Power on
Plug the power cord into the wall outlet and switch the
power on.
4. Check and setting of SYSTEM CONSTANT SET:
(1) Press the [DISPLAY] key and the [PICTURE MODE]
key on the remote control unit simultaneously.
The SERVICE MENU screen will be displayed.(See
Fig.1.)
(2) In the SERVICE MENU, press the [DISPLAY] key and
[PICTURE MODE] key simultaneously. Then, the
S Y S T E M C O N S TA N T S E T s c r e e n w i l l b e
displayed.(See Fig.2.)
(3) Check whether the setting values of the SYSTEM
CONSTANT SET are the same as those indicated
in Table1.
If the value is different, select the setting item with
the MENU [ ]/[
with the MENU [ ]/[ ] key.
(4) Press the [DISPLAY] key twice to return to the normal
screen.
5. Receive channel setting
Refer to the OPERATING INSTRUCTIONS and set the
receive channels (channels preset).
6. User setting
Check the user setting values in Table 2 and Table 3. If
setting value is different, set the correct value.
For setting, refer to the OPERATING INSTRUCTIONS.
7. Setting of SERVICE MENU
Verify the setting for each setting item in the SERVICE
MENU.(See Table 4.) If readjustment is necessary,
perform adjustment referring to "ADJUSTMENTS
PROCEDURE".
NAME OF REMOTE CONTROL KEYS
DISPLAY / BACK
MENU
MENU OK
PICTURE
MODE
1-10 (No. YA104)
] key, and set the correct value
MENU
MENU
MENU
SERVICE MENU
SERVICE MENU
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM W/B 6. S TATUS
7. PLUG & PLAY (OFF)
1-7 : SELECT DISPLAY : EXIT
******* **** ***** *****
**** **** *** ***
Fig. 1
SYSTEM CONSTANT-1
SYSTEM CONSTANT SET 1
SYSTEM : MULTI
COMB YES
TILT YES
SUPER BASS NO
TEXT
NO
LANGUAGE ERAPF
: SEL : OPE DISP : EXIT
SYSTEM CONSTANT-2
SYSTEM CONSTANT SET 2
SOUND PB
BILINGUAL NO
BLUE BACK MUTE
NO
COLOUR AUTO YES
ECO SENSOR YES
: SEL : OPE DISP : EXIT
SYSTEM CONSTANT-3
SYSTEM CONSTANT SET 3
SURROUND YES
PICTURE BOOSTER NO
COMPONENT YES
PIP NO
S INPUT YES
: SEL : OPE DISP : EXIT
Fig. 2