JVC TM-H140PN Service Manual page 38

TM-H140PN
Prior to adjusting PAL CHROMA, PAL PHASE, NTSC 3.58 CHROMA and NTSC 3.58 PHASE, adjustments of PAL system should
always be done first.
Item Test equipment
PAL CHROMA Signal generator
adjustment (Colour bar)
PAL PHASE
adjustment
NTSC 3.58
CHROMA
adjustment
30
Oscillo-scope
G
y
Cy
75% W
Signal generator
(Colour bar)
Oscillo-scope
G
y
Cy
75% W
Mg
Mg
Test points
TP-47B
TP-E(
7h)
[CRT SOCKET
PWB]
R
B
Adjustment
locations
503
(PAL CHROMA)
[SERVICE MENU]
0V±2V
Adjustment procedure
1. Input a PAL colour bar signal.
2. Connect the oscillo-scope probe to TP-47B and
TP-E(
7h ).
3. Select the SIGNAL BLOCK from SERVICE
MENU.
4. Select the S03 item.
5. Adjust the S03 to take the level difference in
waveform is 0V
±
2V as shown in figure.
SOS (PAL PHASE) 1. Check that S08 item data is "062". If the value
[SERVICE MENU]
different, correct it "062".
TP-47B
TP-E(
7h)
[CRT SOCKET
PWB]
R
B
504
(NTSC CHROMA)
[SERVICE MENU]
0V±2V
No.51766
1. Input a NTSC 3.58 colour bar signal.
2. Connect the oscillo-scope probe to TP-47B and
TP-E(
7h ).
3. Select the SIGNAL BLOCK from SERVICE
MENU.
4. Select the S04 item.
5. Adjust the S04 to take the level difference in
waveform is 0V± 2V as shown in figure.