JVC AV-48P575 Series Service Manual page 16

3.2 MEMORY IC REPLACEMENT
3.2.1 MEMORY IC
This memory IC stores data for proper operation of the video and
deflection circuits.
When replacing, be sure to use an IC containing this (initial
value) data.
3.2.2 MEMORY IC REPLACEMENT PROCEDURE
(1) Power off
Switch off the power and disconnect the power cord from
the wall outlet.
(2) Replace the memory IC
Initial value must be entered into the new IC.
(3) Power on
Connect the power cord to the wall outlet and switch on the
power.
(4) SERVICE MENU setting
Before entering the SERVICE MENU, confirm that the setting
of TV/CATV SW of the REMOTE CONTROL UNIT is at the
"TV" side and the setting of VCR/DVD SW of the REMOTE
CONTROL UNIT is at the "VCR" side. If the switches have not
been properly set, you cannot enter the SERVICE MENU.
a) Press [SLEEP TIMER] key and, while the indication
of SLEEP TIMER 0 MIN is being displayed, press
[DISPLAY] key and [VIDEO STATUS] key (Fig.2)
simultaneously.
b) The SERVICE MENU screen of Fig.1 is displayed.
c) Verify what to set in the SERVICE MENU, and set
whatever is necessary (Fig.1).
Refer to the SERVICE ADJUSTMENT for setting.
d) Press the [BACK] key twice to return normal screen.
(5) Receive channel setting
Refer to the OPERATING INSTRUCTIONS (USER'S GUIDE)
and set the receive channels (Channels Preset) as described.
(6) User settings
Check the user setting items according to after page.
Where these do not agree, refer to the OPERATING
INSTRUCTIONS (USER'S GUIDE) and set the items as
described.
3.2.3 SERVICE ADJUSTMENT ITEM
Setting item
1.PICTURE/SOUND
AUDIO
VIDEO
DEFLECTION
FACTORY setting
2.YC SEP
YC separation setting
3.WHITE BALANCE
LOW LIGHT/HIGH LIGHT
adjustment
4.MEMORY SETUP
5.RF AFC
TUNER RF AFT setting
Item No. Remark
A01~A27
S01~S99
D01~D32
F01~F70
YCM001~YCM185
Do not adjust
YCS001~YCS114
BR, DRV R, DRV B,
CUT R, CUT G, CUT B
------ Do not adjust
TUNER, AFC,FINE
Do not adjust
SERVICE MENU
1.PICTURE/SOUND
2.YC SEP
3.WHITE BALANCE
4.MEMORY SETUP
5.RF AFC
6.CONVER A
SERVICE MENU SELECT KEY
VCR/DVD
switch
TV/CATV
MULTI SCREEN
switch
FREEZE SWAP
DISPLAY
SLEEP
TIMER
SOUND
VIDEO
STATUS
MEMORY
(MUTING
FUNCTION
(LEFT)
MENU
Setting item
6.CONVER A
Convergence adjustment
7.CONVER B
Convergence adjustment
8.IP
DIST process setting
9.DSD
DSD process setting
0.HDMI
Digital input setting
7.CONVER B
8.IP
9.DSD
0.HDMI
Fig.1
POWER
TWIN INDEX C.C.
SELECT INPUT
NUMBER
TUNE
ASPECT
LIGHT
FUNCTION
OK (UP)
FUNCTION
(RIGHT)
BACK
BACK
FUNCTION
(DOWN)
RM-C1257G
Fig.2
Item No. Remark
CPA01~CPA11
CCA01~CCA12
Do not adjust
CDA01~CDA07
CBA01~CBA94
------
IPA001~IPA042 Do not adjust
DSA001~DSA053
DSB001~DSB053
Do not adjust
DSC001~DSC044
DSD001~DSD017
HDM001~HDM080
Do not adjust
RHD001~RHD170
(No.YA091)1-15