AV-20N1P
REPLACEMENT OF MEMORY IC
1. MEMORY IC(5) Receive channel setting
This TV uses the following memory IC.Refer to the OPERATING INSTRUCTIONS and set the
Memory IC: IC1704 on MAIN PW Boardreceive channels (channels preset).
The memory IC memorizes data for correctly operating the
video and deflection circuits. When replacing the memory IC,(6) User settings
be sure to use the same type IC written with the initial valuesCheck the user setting items in Tables 2-1 and 2-2, and if
of data. In other words, use the specific IC listed in "PRINTEDsetting value is different, set the correct value.
WIRING BOARD PARTS LIST". For its mounting location, re-For setting, refer to the OPERATING INSTRUCTIONS .
fer to "ADJUSTMENT LOCATIONS".
(7) Setting of SERVICE MENU
2. PROCEDURE FOR REPLACING MEMORY ICVerify the setting for each setting item in the SERVICE
MENU. (See Table 3.) If readjustment is necessary, per-
form adjustment referring to "SERVICE ADJUSTMENTS".
(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.
SERVICE MENU
(3) Power onPICTURE
VIDEO STATUSOTHERS
Plug the power cord into the wall outlet and switch theLOW LIGHTHIGH LIGHT
power on.RF AFC CHK
VCO (CW)I2C BUS CTRL
(4) Check and setting of SYSTEM CONSTANT SET:
SELECT BYEXIT BY
1) Press the DISPLAY key and the VIDEO STATU key onOPERATE BYEXIITT
the remote control unit simultaneously.
The SERVICE MENU screen will be displayed. (See
Fig. 1
Fig. 1.)
2) In the SERVICE MENU, again press the DISPLAY key
and the VIDEO STATU key simultaneously. Then, the
SYSTEM CONSTANT SET screen will be displayed.SYSTEM CONSTANT- I
(See Fig. 2.)
3) Check whether the setting values of the SYSTEM CON-
STANT SET are the same as those indicated in Table
1. If the value is different, select the setting item withSYSTEM CONSTANT
VIDEO:1
the MENU 1/4 key, and set the correct value with the
AUDIO:MONO
MENU 2/3 key.VARI. OUT:NO
(The selected value will be stored in memory when theGAME:YES
CINEMA:YES
MENU 2/3 key is released.)
4) Press the EXIT key twice to return to the normal screen.
SELECT BYEXIT BY
OPERATE BYEXIITT
NAME OF REMOTE CONTROL KEYS
SYSTEM CONSTANT- II
TV/VIDEOPOWERDISPLAY
DISPLAY
PICTURESYSTEM CONSTANT
BOOSTER
CCD:YES
CLOSEDRETURN+:YES
CAPTION123SURROUND:NO
SLEEP
TIMER]]]]]]]]]]]]]456
VIDEOSELECT BYEXIT BY
STATUS789OPERATE BYEXIITT
VIDEO STATUS
COLOUR
SYSTEM100+0RETURN+
EXITMENUFig. 2
EXIT
MENU
MENU
MUTINGMENU
MENU
CHANNEL-VOLUME +
No. 560486 |
ACEC
JVC
