JVC AV28L2EUGR Service Manual page 21

Measuring
Item
instrument
Adjustment Signal
of SUB generator
COLOUR Ⅱ Ⅱ Ⅱ Ⅱ
Oscilloscope
Remote
control unit
W Cy Mg B
Test point Adjustment part
TP-47B 7.COLOUR
TP-E(# # # # )
(PAL/SECAM/NTSC)
[CRT
SOCKET
PWB ]
PAL COLOUR
SECAM COLOUR
(A)
(-)
NTSC COLOUR
0
(+)
[Method of adjustment using measuring instrument]
(PAL COLOUR)
1. Receive a PAL full field colour bar signal(75% white).
2. Select 2.V/C from the SERVICE MENU.
3. Select 7.COLOUR with the FUNCTION UP/DOWN key.
4. Set the initial setting value of PAL COLOUR with the
FUNCTION - or + key.
5. Connect the oscilloscope between TP-47B and TP-E
6. Adjust PAL COLOUR and bring the value of (A) in the
illustration to +5V (voltage difference between white (w) and
blue (B)).
7. Press the MENU key and memorize the setting value.
(SECAM COLOUR)
1. Receive a SECAM full field colour bar signal(75% white).
2. Set the initial setting value of SECAM COLOUR with the
FUNCTION -/+ key.
3. Adjust SECAM COLOUR and bring the value of (A) of the
illustration to +4V (W ～ B).
4. Press the MENU key and memorize the setting value.
(NTSC 3.58 COLOUR)
1. Input a NTSC 3.58MHz COMPOSITE VIDEO signal (full field
colour bar with 75% white) from the EXT terminal.
2. Set the initial setting value of NTSC 3.58 COLOUR with the
FUNCTION -/+ key.
3. Adjust NTSC 3.58 COLOUR and bring the value of (A) of the
illustration to +6V (W ～ B).
4. Press the MENU key and memorize the setting value.
(NTSC 4.43 COLOUR)
1. Input a NTSC 4.43MHz COMPOSITE VIDEO signal (full field
colour bar with 75% white) from the EXT terminal.
2. Set the initial setting value of NTSC 4.43 COLOUR with the
FUNCTION -/+ key.
3. Adjust NTSC 4.43 COLOUR and bring the value of (A) of the
illustration to +6V (W ～ B).
4. Press the MENU key and memorize the setting value.
No. 51778
AV28L2EUGR
AV28L2EUBL
AV28L2EUGY
Description
21