7

Video ICs

BA7796FS

V

100k

100k

V

0.1

µ

0.1

µ

~

1k

1

2

3

4

PB IN

REC OUT

Fig. 2 REC head switch AC withstanding voltage measurement circuit

(1) REC / EE CTRL, PB / EE CTRL, INPUT SW CTRL

REC / EE

PB HSW

LINE SW

REC AMP

L

L

L

TUNER

OFF

ON

TUNER

OFF

L

L

M

LINE2

OFF

ON

LINE2

OFF

L

L

H

LINE1

OFF

ON

LINE1

OFF

LH

—

PB

OFF

ON

PB

OFF

H

L

L

TU REC

ON

OFF

TUNER

ON

H

L

M

L2 REC

ON

OFF

LINE2

ON

H

L

H

L1 REC

ON

OFF

LINE1

ON

HH

—

inhibit

————

REC HSW

INPUT SW

PB / EE

If REC / EE CTRL is set to“M”, the REC pause state is possible (REC head switch: open, REC amplifier: off).

Control pins

Mode

Mode

Function

(2) MUTE CTRL

MUTE

LINE SW

H

MUTE

OPEN

L

MUTE

CLOSE

Function

Control pins

Mode

(3) EQ CTRL

E Q

2 MODE

3 MODE

HEAD EQ

PB EQ

REC EQ

L

SP

SP

OFF

CLOSE

CLOSE

M

—

LP

ON

OPEN

CLOSE

H

EP

EP

ON

OPEN

OPEN

Mode

Function

Control pins