Video ICs
BA7796FS
~V BVRHAC
100k
SW3
0.1µ
100k
V V3
0.1µ
1
PB IN
2
3
4
REC OUT
1k
~ e3
Fig. 2 REC head switch AC withstanding voltage measurement circuit
•Control mode table
(1) REC / EE CTRL, PB / EE CTRL, INPUT SW CTRL
REC / EE
L
L
L
L
H
H
H
H
Control pins
PB / EE
L
L
L
H
L
L
L
H
INPUT SW
L
M
H
—
L
M
H
—
Mode
TUNER
LINE2
LINE1
PB
TU REC
L2 REC
L1 REC
inhibit
PB HSW
OFF
OFF
OFF
OFF
ON
ON
ON
—
Function
REC HSW LINE SW
ON
TUNER
ON
LINE2
ON
LINE1
ON
PB
OFF
TUNER
OFF
LINE2
OFF
LINE1
—
—
If REC / EE CTRL is set to“M”, the REC pause state is possible (REC head switch: open, REC amplifier: off).
REC AMP
OFF
OFF
OFF
OFF
ON
ON
ON
—
(2) MUTE CTRL
Control pins
MUTE
H
L
Function
Mode
LINE SW
MUTE OPEN
MUTE CLOSE
(3) EQ CTRL
Control pins
EQ
L
M
H
Mode
Function
2 MODE 3 MODE HEAD EQ PB EQ REC EQ
SP
SP
OFF
CLOSE CLOSE
—
LP
ON
OPEN CLOSE
EP
EP
ON
OPEN OPEN
7