JVC PD-42WV74 Service Manual page 18

3.3 REPLACEMENT OF MEMORY IC
This unit uses the nonvolatile memory IC. The memory IC memories data for video-chroma and drive circuits. To replace the memory
IC without the data written, malfunctions might occurred while power is on, and the normal image might not appear. When replacing
the memory IC, be sure to use the IC written with the initial values of data.
3.3.1 PROCEDURE FOR REPLACING THE MEMORY IC
NOTE:
Before entering the SERVICE MODE, 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 is at the "VCR"
side. If the switches have not been properly set, you cannot
enter the SERVICE MODE.
(1) Switch the power off and unplug the power cord from the
wall outlet.
(2) Replacing the memory IC. [Be sure to use the IC written
with the initial values of data]
(3) Plug the power cord into the wall outlet and switch the
power on.
(4) Receive channel setting
(5) User setting
Memories the user setting items. The [SETTINGS OF
FACTORY SHIPMENT] setting is as next page.
(6) SERVICE MODE
Check the SERVICE MODE setting items of setting mode
in Table 1, set if necessary. For setting method, please
refer to the [ADJUSTMENT
ADJUSTMENT PROCEDURE ] of ADJUSTMENT section.
MAIN MENU MAIN MENU
1.PICTURE/SOUND
2.YC SEP
3.WHITE BALANCE
4.MEMORY SETUP
5.RF AFC
6.DD/CM
1-18 (No.YA029)
PREPARATION :
7.PANEL
8.PP
9.IP
0.HDMI
SERVICE MODE SETTING ITEMS
Setting items
1. PICTURE/SOUND (sound and picture setting)
Sound circuits (A)
Video circuits (S)
Deflection circuits (D)
Factory setting items (F)
2. YC SEP
3-dimensional YC separation
setting
3. WHITE BALANCE: Cannot adjust
4. MEMORY SETUP: Do not adjust
Memory data edit
5. RF AFC: AFC setting (Automaticaly set)
6. DD/CM
Panel image processing setting
7. PANEL: Do not adjust
Panel power limit control
8. PP
Multi-screen processing setting
9. IP
DIST processing setting
0. HDMI
Digital input process setting
Settings Item No.
Fixed A01~A27
Adjust S01~S99
Fixed D01~D32
Adjust F01~F59
Adjust YCM001~YCM185
Fixed YCS001~YCS114
Fixed -
Adjust DDT01~DDT34
Fixed CMT01~CMT57
Fixed DDP01~DDP37
Fixed CMP01~CMP03
Fixed PDA001~PDA012
Fixed PDB001~PDA021
Fixed RGA001~RGA003
Adjust ADM001~ADM034
Fixed PPA001~PPA008
Fixed PPB001~PPB036
Fixed PPC001~PPC008
Fixed PPD001~PPD025
Fixed IPA001~IPA120
Fixed IPB001~IPB079
Fixed IPC001~IPC044
Fixed IPD001~IPD026
Fixed IPE001~IPE015
Fixed HDM001~HDM080
Fixed RHD001~RHD170