AV-21PM
No. 56055
6
REPLACEMENT OF MEMORY IC
1.
MEMORY IC
This TV uses the following memory IC.
Memory IC: IC1702 on MAIN PW Board
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, re-
fer to "ADJUSTMENT LOCATIONS".
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 SYS-
TEM CONSTANT SET screen will be displayed. (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 with
the MENU
a
key, and set the correct value 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).
NAME OF REMOTE CONTROL KEYS
Fig. 1
(6) User setting
Check the user setting values in Table 2, and 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 3.) If readjustment is necessary, per-
form adjustment referring to "SERVICE ADJUSTMENTS".
SERVICE MENU
1. IF
3. DEF
5. PRESET
6. TURBO TIMER OFF
2. V/C
4. VSM PRESET
SERVICE MENU
1-6 : SELECT
DISP : EXIT
✽✽✽✽✽✽✽✽
✽✽✽✽✽
✽✽
.
✽✽✽✽
✽✽✽ ✽✽✽✽✽
✽✽
.
✽✽✽✽
+
−
+
−
POWER
PICTURE
MODE
SYSTEM
ECO
SENSOR
COLOUR
SOUND
TV/VIDEO
OFF
TIMER
CHANNEL
SCAN
DISPLAY
1
4
5
6
2
3
7
8
0
9
-/- -
MUTING
MENU
CHANNEL
VOLUME
I / II
PICTURE
MODE
MENU
MENU +
MENU
DISPLAY
MENU –
COLOUR
: MULTI
BILINGUAL
: NO
TUNER
: MU
ECO SENSOR
: YES
LANGUAGE
: E / R / A / F
SYSTEM CONSTANT -
I
SYSTEM CONSTANT SET 1/3
B/B SOUND
: OFF
LOCK
: 180
COLOUR AUTO
: NO
QSS
: MINT
ALC
: NO
TEXT RATE
: 20
SYSTEM CONSTANT -
II
SYSTEM CONSTANT SET 2/3
−
/
+
: OPERATE
DISP : EXIT
− / +
: OPERATE
DISP : EXIT
Fig. 2
a
: SELECT
a
: SELECT
AMP TUNER
: NO
VNR
: YES
EW-PIN IC
: YES
SYSTEM CONSTANT -
III
SYSTEM CONSTANT SET 3/3
−
/
+
: OPERATE
DISP : EXIT
a
: SELECT
