Memory Ic Replacement - JVC DT-V1710CG Service Manual

3.3 MEMORY IC REPLACEMENT

3.3.1 MEMORY IC
The unit incorporates a nonvolatile Memory IC, which stores data on the video and deflection systems, etc.
When it is replaced with an IC without the data stored in it, the set may malfunction or the video may become abnormal
when the unit is turned on.
When replacing the Memory IC, be sure to use an IC in which the data (initial values) has already been written.
3.3.2 MEMORY IC REPLACEMENT PRECDURE
1. Turn the unit off and unplug the power cord from the power
outlet.
2. Replace the Memory IC with a new Memory IC storing
the initial setting value data.
3. Plug the power cord into the power outlet and turn the
unit on.
4. Check the SETUP MENU and set its items as required.
(1) While holding down the
key.
(2) The SETUP MENU appears (Fig. 1).
(3) Check the items in the SETUP MENU by comparing
them with the data in the table on page 1-10.
If any item is set differently, set it as required.
5. Check the MAIN MENU and set its items as required.
Press the [MENU] key to display the MAIN MENU (Fig.
2). Check the items in the MAIN MENU by comparing
them with the data in the table on page 1-11. If any item is
set differently, set it as required.
6. Adjust the items that can be adjusted on the front panel.
(Some items cannot be adjusted unless the required signal
is input.)
7. Check that the initial values of the items in the SERVICE
MENU (Fig. 3). If any item is set differently, set it as
required.
For the setting method and the initial values, see the
corresponding pages for "SERVICE ADJUSTMENTS" in
this manual.
key, press the VOL - ( )
< >
SETUP MENU
FUNCTION SETTING
PICTURE SUB ADJ.
COLOR TEMP./BAL.
SIZE/POSI. ADJ.
DISTORTION ADJ.
STATUS DISPLAY
CONTROL LOCK : OFF
all reset
ENTER: +
EXIT:
SELECT:
MENU
Fig. 1
< >
MAIN MENU
APERTURE CONTROL
SLOT CONDITION
sub menu POSITION : LOWER
AREA MARKER
COLOR MATRIX
ENTER: +
EXIT:
SELECT:
MENU
Fig. 2
SIGNAL BLOCK
WHITE BALANCE BLOCK
DEFLECTION BLOCK
CPU BLOCK
DIAGNOSIS
UPC1884 ADJ.
TA1276 ADJ.
HOUR METER
ENTER: +
EXIT: SELECT:
MENU
Fig. 3
(No. 52152) 1-9