JVC AV-20N3 Service Manual page 25

Measuring
Item
instrument
Signal
Ad justment
gener ator
of TINTⅠ Ⅰ Ⅰ Ⅰ
Remote
control unit
Signal
Ad justment
gener ator
of TINTⅡ Ⅱ Ⅱ Ⅱ
Oscillo-
scope
Remote
control unit
W
Y
Cy
Test point Ad justment part
6. TINT
NT SC 3.58 T INT
NT SC 4.43 TINT
TP-47G/R 6. TINT
TP-E (# # # # )
[CRT
NT SC 3.58 T INT
SOCKET
PWB]
B
R
Mg
(－)
0V
(B)
(＋)
G
NT SC 4.43 TINT
[Method of adjustm ent without m easuring instrument]
1. Input a NTSC 3.58 full field colour bar signal (75% white).
2. Enter the SERVICE MENU.
3. Select 2. V/C from SERVICE MENU.
4. Select 6. TINT with the MENU ▼/▲ key.
5. Set the initial setting value of NTSC 3.58 with the MENU - / +
key.
6. If you cannot get the best tint with the initial setting value, make
fine adjustment until you get the best tint.
When NTSC 3.58 is set, NTSC 4.43 will be automatically set at the
respective values .
[Method of adjustm ent using measur ing instrument]
1. Input a NTSC 3.58 full field colour bar signal (75% white).
2. Enter the SERVICE MENU.
3. Select 2. V/C from SERVICE MENU.
4. Select 6. TINT with the MENU ▼/▲ key.
5. Set the initial setting value of NTSC 3.58 with the MENU - / +
key.
6. Connect the osc illosc ope between TP-47G/R and TP-E.
7. Adjust NTSC 3.58 TINT to bring the value of
illustration to the voltage as shown given billow.
(Voltage differenc e between (W) and (Cy))
Model
AV-20N3
AV-20N3
/D
AV-20NMG3
AV-20NMG3B
AV-20NMG3
/-A
When NTSC 3.58 is set, NTSC 4.43 will be automatically set at the
respective values .
No. 52025
AV-20NMG3
AV-20NMG3B
Description
(B)
Voltage(W- Cy)
+9V
+9V
AV-20N3
in the
25