JVC AV-2586ME Service Manual page 28

Measuring
Item
instrument
SUB BRIGHT Remote
control unit
SUB Remote
CONTRAST control unit
SUB COLOUR Remote
control unit
Signal
generator
Oscilloscope
Remote
control unit
Y
W
VOLTAGE (W-B)
AV-2586ME
AV-25MS26
AV-25MX76/G
1-28 (No.YA444)
Test point Adjustment part
[2. V/C]
4. BRIGHT
[2. V/C]
5. CONT
[2. V/C]
6. COLOUR
TP-47B [2. V/C]
TP-E 6. COLOUR
[CRT SOCKET
PWB]
G R
(-)
(A)
0
B
C M
(+)
Voltage setting
PAL NTSC SECAM
+24V +21V +5V
+25V +27V +5V
+25V +27V +5V
Description
(1) Receive a NTSC broadcast.
(2) Set the PICTURE MODE to BRIGHT.
(3) Select 2. V/C from the SERVICE MODE.
(4) Select <4. BRIGHT>.
(5) Set the initial setting value of <4. BRIGHT>.
(6) If the brightness is not best with the initial setting value,
make fine adjustment until you get the best brightness.
(7) Press the [OK] key to memorize the set values.
(1) Receive a NTSC broadcast.
(2) Set the PICTURE MODE to BRIGHT.
(3) Select 2. V/C from the SERVICE MODE.
(4) Select <5. CONT>.
(5) Set the initial setting value of <5. CONT>.
(6) If the contrast is not best with the initial setting value,
make fine adjustment until you get the best contrast.
(7) Press the [OK] key to memorize the set values.
[Method of adjustment without measuring instrument]
PAL COLOUR
(1) Receive a PAL M broadcast.
(2) Set the PICTURE MODE to BRIGHT.
(3) Select 2. V/C from the SERVICE MODE.
(4) Select <6. COLOUR>.
(5) Set the initial setting value of <6. COLOUR>.
(6) If the colour is not the best with the initial set value,
make fine adjustment until you get the best colour.
(7) Press the [OK] key to memorize the set values.
SECAM COLOUR
(1) Receive a SECAM broadcast.
(2) Follow the same step 2 to 7 as in PAL COLOUR.
NTSC 3.58 COLOUR
(1) Receive a NTSC 3.58MHz broadcast.
(2) Follow the same step 2 to 7 as in PAL COLOUR.
NTSC 4.43 COLOUR
• When NTSC 3.58 COLOUR is set, NTSC 4.43
COLOUR will be automatically set.
[Method of adjustment using measuring instrument]
PAL COLOUR
(1) Receive a PAL M colour bar signal (full field colour
bar 75% white).
(2) Connect the oscilloscope between TP-47B and TP-E.
(3) Set the PICTURE MODE to BRIGHT.
(4) Select 2. V/C from the SERVICE MODE.
(5) Select <6. COLOUR>.
(6) Set the initial setting value of <6. COLOUR>.
(7) Adjust the value of (A) to the value in the voltage
table in the left.
(8) Press the [OK] key to memorize the set values.
SECAM COLOUR
(1) Receive a SECAM colour bar signal (full field colour
bar 75% white)
(2) Follow the same step 2 to 8 as in PAL COLOUR.
NTSC 3.58 COLOUR
(1) Receive a NTSC 3.58MHz broadcast.
(2) Follow the same step 2 to 8 as in PAL COLOUR.
NTSC 4.43 COLOUR
• When NTSC 3.58 COLOUR is set, NTSC 4.43
COLOUR will be automatically set.