JVC AV-21VT14/P Service Manual page 21

Measuring
Item
instrument
SUB COLOUR 1 Remote
adjustment control unit
SUB COLOUR 2 Signal
adjustment generator
Oscilloscope
Remote
control unit
W
Test point Adjustment part
[2. V/C]
6. COLOUR
TP-47G [2. V/C]
TP-E 6. COLOUR
[CRT SOCKET
PWB]
B
M
R
(A)
C
(–)
0V
(+)
G
Y
Description
[Method of adjustment without measuring instrument]
Notes:
• Proceed to the following adjustment after having
completed the SUB CONTRAST adjustment.
• Set PICTURE MODE (VSM) to "BRIGHT".
- PAL COLOUR -
(1) Receive a PAL broadcast.
(2) Select 2. V/C from the SERVICE MENU.
(3) Select 6. COLOUR.
(4) Set the initial setting value for PAL COLOUR.
(5) If the colour is not best with the initial setting value,
adjust until you get the best colour.
(6) Press the [DISPLAY] key twice to return to the
normal screen.
- SECAM COLOUR -
(1) Receive a SECAM broadcast.
(2) Press the [COLOUR SYSTEM] key to select the
SECAM colour system.
(3) Adjust SECAM COLOUR in the same way as for
"PAL COLOUR".
- NTSC 3.58 COLOUR -
(1) Receive a NTSC 3.58MHz broadcast.
(2) Press the [COLOUR SYSTEM] key to select the
NTSC 3.58 colour system.
(3) Adjust NTSC 3.58 COLOUR in the same way as for
"PAL COLOUR".
- NTSC 4.43 COLOUR -
When adjustment is done for NTSC 3.58 COLOUR,
appropriate values are automatically set for NTSC 4.43
COLOUR.
[Method of adjustment using measuring instrument]
Notes:
• Proceed to the following adjustment after having
completed the SUB CONTRAST adjustment.
• Set PICTURE MODE (VSM) to "BRIGHT".
- PAL COLOUR -
(1) Receive a PAL colour bar signal (full field colour bar
75% white).
(2) Select 2. V/C from the SERVICE MENU.
(3) Select 6. COLOUR.
(4) Set the initial setting value of PAL COLOUR.
(5) Connect the oscilloscope between TP-47G and TP-E.
(6) Adjust PAL COLOUR to set the value (A) in the figure
to +12V.
- SECAM COLOUR -
(1) Receive a SECAM colour bar signal (colour bar 75%
white).
(2) Press the [COLOUR SYSTEM] key to select the
SECAM colour system.
(3) Set the initial setting value of SECAM COLOUR.
(4) Adjust SECAM COLOUR to set the value (A) in the
figure to ---.
- NTSC 3.58 COLOUR -
(1) Receive a NTSC 3.58 colour bar signal (full field
colour bar 75% white).
(2) Press the [COLOUR SYSTEM] key to select the
NTSC 3.58 colour system.
(3) Set the initial setting value of NTSC 3.58 COLOUR.
(4) Adjust NTSC 3.58 COLOUR to set the value (A) in
the figure to +4V.
- NTSC 4.43 COLOUR -
When adjustment is done for NTSC 3.58 COLOUR,
appropriate values are automatically set for NTSC 4.43
COLOUR.
(No.YA140)1-21