JVC AV-28T5BK/P Service Manual page 15

3.2 MEMORY IC REPLACEMENT
• This model uses the memory IC.
• This memory IC stores data for proper operation of the video and drive circuits.
• When replacing, be sure to use an IC containing this (initial value) data.
3.2.1 MEMORY IC REPLACEMENT PROCEDURE
1. Power off
Switch off the power and disconnect the power plug from the
AC outlet.
2. Replace the memory IC
Be sure to use the memory IC written with the initial setting
values.
3. Power on
Connect the power plug to the AC outlet and switch on the
power.
4. System constant check and setting
* It must not adjust without signal.
(1) Press the [INFORMATION] key and the [MUTING] key
of the REMOTE CONTROL UNIT simultaneously.
(2) The SERVICE MODE screen of Fig. 1 will be displayed.
(3) While the SERVICE MODE is displayed, press the
[INFORMATION] key and [MUTING] key simultaneously,
and the SYSTEM CONSTANT SET screen of Fig. 2 will
be displayed.
(4) Refer to the "SYSTEM CONSTANT SETTING", and
check the setting items. Where these differ, select the
addres with the [FUNCTION
the [FUNCTION / ] keys. (The letter of the selected
item is displayed in yellow.)
(5) Setup will become effective if the main power is shut off.
5. Receiving channel setting
Refer to the OPERATING INSTRUCTIONS and set the
receive channels (Channels Preset) as described.
6. User settings
Check the user setting items according to the given in page
later. Where these do not agree, refer to the OPERATING
INSTRUCTIONS and set the items as described.
7. SERVICE MODE setting
Verify what to set in the SERVICE MODE, and set whatever is
necessary (Fig.1). Refer to the SERVICE ADJUSTMENT for
setting.
3.2.2 SYSTEM CONSTANT SETTING
Address
AV-28T5SK
00
01
/ ] key and adjust it with
AV-28T5SP
A7 EF
00 02
SERVICE MENU
1. IF
3. AUDIO
5. VSM PRESET
7. SHIPPING (OFF)
MODEL=JW2 EURO (XXXXX)
Address
EEP EDIT (LAST MEMORY)
TOP ADDRESS=000H
00 01 02 03 04 05 06 07
8F 00 FE FF FF FF FF FF
08 09 0A 0B 0C 0D 0E 0F
FF 01 BB FC 1F F9 FF FF
Setting data
MUTING
1
4
7
INFORMATION
TV
FUNCTION
/
Setting data
AV-28T5SR AV-28T5BR
E7 E7
01 01
2. V/C
4. DEF
6. VPS
Fig.1
Do not adjust
Fig.2
2 3
5 6
8 9
0
AV
MENU
P
MENU
OK
FUNCTION
/
P
TV
AV-28T5BK
A7
00
(No.YA261)1-9