— 4 —
3. TINT color adjustment
•
Conditions
(1) Apply 11.50
±
0.05 [V] on Vcc1-1.
(2) Signals:
provide color bar pattern (white 75 %) composite video signal from CP196.
Signal level; 1Vp-p
±
0.01V (75 ohm termination), conforming to NTSC-M system.
(3) Connect 47kohm resistor between CP304 and CP300 (GND).
•
Adjustment
(1) Triggering CP702 (FRP), observe CP706 (VB) waveform.
(2) Adjust VR302 so that
1
,
4
pulses are level.
(3) Adjust VR303 so that
2
,
3
pulses are level.
(4) Adjust VR302 so that
1
,
4
pulses are level.
(5) Adjust VR303 so that
2
,
3
pulses are level.
•
Caution
(1) Be sure that amplitude difference between (1) and (4) pulses is less than 0.1 [V].
(2) Be sure that amplitude difference between (2) and (3) pulses is less than 0.1 [V].
VCC1-1
IF signal
Signal
generator
Stabilizer
Oscilloscope
M-PCB
CP706
