ICs for TV
AN5195K-C
■ Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
Description
DC (V)
52
Horizontal AFC2 filter pin:
DC
1.5 V
to
6.3 V
(VCC2
To hor. out
)
• Pulse phase of FBP and IC inside are
compared and capacitor connected to
pin 52 is charged or discharged.
• Screen center position adjustment is
executed by charge or discharge of
DC current with DAC.
2 kΩ
2 kΩ
1.9V
V52
3.5 V
AFC2
detecter
I
From DAC
(hor. position)
3.3 V
• According to the time from H-out to
FBP-in, V52 is changed, and slice
52
1 kΩ
1 kΩ
0.022 µF
level of inside saw-tooth waveform is
changed.
50 µA
max.500 µA
53
Horizontal AFC1 filter pin:
• Pulse phase of horizontal sync. sig-
nal and IC inside are compared and
capacitor connected to pin 53 is
charged or discharged.
DC
6.3 V
(VCC2
)
typ. 4.3 V
4.3 V
R1
27 kΩ
27 kΩ
AFC1
detecter
• R1, R2, C1 and C2 are lag-lead fil-
ters for AFC1
1.5 V
53
Horizontal β curve
Hor.
OSC
22 µF
Hor. sync.
fH
C2
200 µA
0.033 µF
C1
820 Ω
R2
1 000 µA
V53
54
Horizontal oscillation pin:
AC
6.3 V
(VCC2
)
•
Oscillation is done at 32 × fH 503 kHz
f = 32 fH
by ceramic resonator.
(approx. 503 kHz)
22 kΩ
• Horizontal and vertical pulse are
made by count-down circuit of IC
inside.
300 Ω
80 µA
100
µA
200
µA
10 k 10 k
54
Ω
Ω
220 pF
55
6.3 V
(VCC2
Overvoltage protection input pin:
• Input pin for protection circuit
against X-ray caused by overvoltage.
• Shut-down is started by inside logic
circuit when H-out is low. (break-
down protection of horizontal drive
TR)
DC
)
Normally 0 V
4.3 V
40 kΩ
20 kΩ
20 kΩ
3 V
To
count down
20 kΩ
55
6.3 V
(VCC2
56
Horizontal pulse output pin:
• Pulse duty approx. 36%
AC
4.3 V
19 kΩ
)
Pulse
50 Ω
56
2.8 V
0 V
10 kΩ
40 kΩ
Hor. out
23
PANASONIC [ PANASONIC ]
