— 6 —
•
Caution
(1) Make sure that there is no distortion on the waveforms.
(2) Connect COLOR terminal of Chroma IC (M52045FP) to GND.
(3) Monitor the B output signal with an oscilloscope via a low-pass filter (C = 2700 pF, R = 100 ohm).
•
Block diagram
5.TINT pot adjustment
•
Condition
(1) Signal
Broadcasting system: B/G,H
Color system: PAL color bar
(2) Signal level
Input electric field: 70 dB
µ
(75-ohm termination), P/S = 10 dB
(3) Other conditions
CCIR IF input (input electric field should be terminated with 75-ohm resistance).
Apply voltage of Vcc1-1 = 5.0
±
0.05 [V]
•
Adjustment
Observing output signal B with an oscilloscope, adjust TINT pot VR301 so that the wave from H and
H' will be same.
•
Caution
Do not connect COLOR terminal to GND.
Monitor B output signal with an oscilloscope via a low-pass filter (C = 2700 pF, R = 100 ohm).
•
Block diagram
L-PCB
VCC1-1
Stabilizer
B output
Low-Pass Filter
Signal
generator
Oscilloscope
White level
Pedestal level
L-PCB
VCC1-1
Stabilizer
Low-Pass Filter
B output
Signal
generator
Oscilloscope
H
H’
