JVC HV-34LH21, Service Manual

Page: 2 / 21

1-10 (No.52200)
3.3 MEMORY IC REPLACEMENT
3.3.1 MEMORY IC
This TV use memory IC.
In the memory IC, there are memorized data for correctly
operating the video and deflection circuits.
When replacing memory IC, be sure to use IC written with the
initial values of data.
3.3.2 PROCEDURE FOR REPLACING MEMORY IC
(1) Power off
Switch the power off and disconnect the power cord from
the wall outlet.
(2) Replace the memory IC
Be sure to use a memory IC 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 setting of SYSTEM CONSTANT SET
• It must not adjust without signal.
a) Press the [DISPLAY] key and the [PICTURE MODE]
key of the REMOTE CONTROL UNIT
simultaneously.
b) The SERVICE MENU screen of Fig. 1 will be
displayed.
c) While the SERVICE MENU is displayed, press the
[DISPLAY] key and [PICTURE MODE] key
simultaneously, and the SYSTEM CONSTANT SET
screen of Fig. 2 will be displayed.
d) Check the setting values of the SYSTEM
CONSTANT SETTING. If the value is different, select
the setting item with the [MENU
/ ] key, and set
the correct value with the [MENU / ] key.
e) Press the [OK] key to memorize the setting value.
f) Press the [DISPLAY] key, and return to the normal
screen.
(5) Receive channels setting
Refer to the OPERATING INSTRUCTIONS and set the
receive channels (channels preset) as described.
(6) User settings
Check the user setting values 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.
Fig.1
Fig.2
Fig.3
1. IF
3. AUDIO
5. VSM PRESET
7.PIP
9. SHIPPING(OFF) 2. V/C
4. DEF
6. STATUS
8. SURROUND
0. BUS FREE
SERVICE MENU
1-9 : SELECT DISP : EXIT
1. TEXT
SYSTEM CONTANT SET
DISP : EXIT -/+ : STORE OK
2. PIP
3. COLOUR AUTO
4. BLUE BACK MUTE
ZOOM
(ASPECT) key
DISPLAY key
PICTURE MODE
key
MENU key
(
/ & / )
Numbers keys
[RM-C1350]
OK key
SERVICE MENU