Service manual

74
Pin
Name
Voltage and
Peripheral circuit of pins Description of function
No. wave Information
30 FAST BLK IN
31 APC FILTER 6.5V
32
CHROMA
6.8V
OSC
33 ACC FILTER
Applying voltage of 2.5V
or more causes blanking
Cap challenge is
changed by R. As R is
decreased, the cap chal-
tenge becomes narrow-
er, but phase, jitters are
reduced.
Use XTAL of series
capacitance type.
As R is decreased, chro-
ma output increases but
ACC is not activated
smothly.
DESCRIPTION OF PIN (cont).
1k
1k
1k
3p
300 300
M351T01
300
0
50k
Vth
V
2.5V
666 666
4k
R
1.6k
22k
3k
2k
R
Vcc