JVC AV-20N3 Service Manual page 10

AV-20N3
AV-20NMG3
AV-20NMG3B
REPLACEMENT OF MEMORY ICs
1. MEMORY ICs
This model uses memory ICs. This memory IC data are for proper operation of the video and deflection circuits.
When replacing memory ICs, be sure to us e ICs written with the initial values of data.
2. PROCEDURE FOR REPLACING MEMORY ICs
(1) Power off
Switch the power off and disconnect the power plug from the wall outlet.
(2) Replace ICs
Be sure to use memory ICs written with the initial data values.
(3) Power on
Connect the power plug into the wall outlet and switch the power on.
(4) Check and set SYSTEM CONSTANT SET
・ ・ ・ ・ It must not adjust without adjustment signals.
1) Press the DISPLAY key and the PICTURE MODE key of the REMOTE
CONTROL UNIT simultaneously.
2) The SERVICE MENU screen of Fig. 1 will be displayed.
3) While the SERVICE MENU is displayed, again press the DISPLAY key and
PICTURE MODE key simultaneously, and the SYSTEM CONSTANT SET
screen of Fig. 2 will be displayed.
4) Check the setting values of the SYSTEM CONSTANT SET of T able 1 If the
value is different, select the s etting item with the MENU ▼/▲key, and s et
the correct value with the MENU - / + k ey.
5) Press the DISPLAY key twice, and return to the normal screen.
(5) Receive channel of setting
Refer to the OPERATING INST RUCTIONS and set the receive channels
(channels preset) as described
(6) User Setting
Check the us er s etting value of 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 items of the SERVICE MENU, and reset where necessary.
For setting, refer to the SERVICE ADJUSTMENTS.
KEY ASSIGNMENT OF REMOTE CONTROL UNIT
DISPLAY
key
MENU
－ / ＋ key
Except for difference in body colour, the Remote Control
Unit RM-C364GY and RM-C364 have exactly the same
Func tions
10
PICT URE
MODE key
NUMBERS
key
MENU
▼ / ▲ key
No. 52025
SERVICE MENU
1.IF 2.V/C
3.DEF 4.VSM PRESET
5.PRESET
6.SETUP TOUR OFF
1-6 SELECT DISP : EXIT
.
****** ***** ****** ****** ****** ***** ***** ***** ** ** ** ** *** *** *** ***
*** *** ** ** ** ** ** ** *** ***
*** *** ** ** ** ** ** ** *** ***
Fig.1
SYSTEM CONSTANT- Ⅰ Ⅰ Ⅰ Ⅰ
SYSTEM CONSTANT SET 1
COLOUR :
***
BILINGUAL : NO
TUNER : MU
ECO SENSOR : YES
LANGUAGE :
***
/ : SELECT
- / + : OPERATE DISP : EXIT
SYSTEM CONSTANT-Ⅱ Ⅱ Ⅱ Ⅱ
SYSTEM CONSTANT SET 2
B/B SOUND :
***
LOCK : 180
COLOUR AUTO :
***
QSS : MINT
ALC : NO
TEXT RATE : 20
: SELECT
/
- / + : OPERATE DISP : EXIT
SYSTEM CONSTANT-Ⅲ Ⅲ Ⅲ Ⅲ
SYSTEM CONSTANT SET 3
AMP TUNER : NO
VNR : YES
TEXT TABLE : CYL
VOLUM PWM : POS
: SELECT
/
- / + : OPERATE DISP : EXIT
Fig.2