JVC AV-28T5BK/P Service Manual page 21

4.6 TOOL OF SERVICE MODE OPERATION
Operate the SERVICE MODE with the REMOTE CONTROL UNIT.
4.6.1 SERVICE MODE ITEMS
With the SERVICE MODE, various adjustment can be made, and they are broadly classified in the following items of settings.
1.IF This mode adjusts the IF circuit.
2.V/C This mode adjusts the VIDEO circuit
3.AUDIO This mode adjusts the AUDIO circuit. [Do no adjust]
4.DEF This mode adjusts the DEFLECTION circuit.
5.VSM PRESET This mode sets the VSM (Video Status Memory) data.
6.VPS This mode shows the monitor of the VPS, PDC, WSS and SN. [Do not adjust]
7.SHIPPING (OFF) This mode initialize the data for factory shipment. [Do no adjust]
4.6.2 BASIC OPERATION IN SERVICE MODE
4.6.2.1 HOW TO ENTER THE SERVICE MODE
Press the [INFORMATION] key and [MUTING] key of the
REMOTE CONTROL UNIT simultaneously. Then SERVICE
MODE screen will be displayed as shown figure.
SERVICE MENU
1. IF
3. AUDIO
5. VSM PRESET
7. SHIPPING(OFF)
MUTING
1
4
7
INFORMATION
TV
FUNCTION
/
2. V/C
4. DEF
6. VPS
Fig.1
2 3
5 6
8 9
0
AV
MENU
P
MENU
OK
FUNCTION
/
P
TV
Fig.2
4.6.2.2 SELECTION OF SUB MENU SCREEN
Press one of the CHANNEL number key with the remote control
unit, and select the SUB MENU SCREEN from SERVICE
MODE.
4.6.2.3 SETTING METHOD
1.IF
[1. VCO] : It must not adjust without signal
(1) [1] key
Select 1.IF.
(2) [1] key
Select 1.VCO(CW).
Check the arrow position between the ABOVE REF. and
BELOW REF.
(3) [INFORMATION] key
Return to the SERVICE MODE main manu screen.
2.V/C, 4.DEF and 5.VSM PRESET.
(1) [2], [4] and [5]key
Select one from 2.V/C, 4.DEF, 5.VSM PRESET.
(2) [FUNCTION / ] key
Select setting items.
(3) [FUNCTION / ] key
Set the setting values of the setting items.
(4) [MENU] key
Memorize the setting value.
(Before storing the setting values in memory, do not
press the CH, TV, POWER ON / OFF key. if you do, the
values will not be stored in memory.)
(5) [INFORMATION] key
Return to the SERVICE MODE main manu screen.
3.AUDIO, 6.VPS and 7.SHIPPING (OFF)
It is not requirement to adjustment.
4.6.2.4 MEMORIZE THE ADJUSTMENT DATA
When adjustment is completed, press the [MENU] key to
memorize the adjustment value. If not to do it, adjustment data is
not memorized to the memory IC. And if exit the adjustment
mode before memorize the data, the adjustment value which you
change is canceled.
4.6.2.5 RELEASE OF SERVICE MODE
After completing the setting, return to the SERVICE MODE, then
again press the [INFORMATION] key.
(No.YA261)1-15