Harman Kardon DVD 27, Service Manual

Page: 72 / 110

3
Multimedia ICs BA7660FS
•
Pin descriptions and input / output circuits
Pin. No Pin name IN OUT
Reference
voltage
Equivalent circuit Function
1 MUTE
K
— —
K
— —
2
4
7 INA
INB
INC
—
K
0.9V
0.95V
14
12
9
15
13
10
OUTA2
OUTB2
OUTC2
OUTA1
OUTB1
OUTC1
— — 5.0V 16 V
CC
Muting control
If MUTE (pin 1) is set to HIGH, muting
is carried out simultaneously on all
three channels.
Signal input
Input signals consist of composite
video signals, Y signals, C signals,
RGB, and others. The input level is
within a range of 0 to 1.3 (min.) to 1.5
(typ.).
— — 0V
3
5
8
GND
Ground
Signal output
The signal output level is (0.9 + 2
×
input voltage [V]). Pins 9, 12, and 14
are the pins for sag correction. If pins
10, 13, and 15 are set to 0.2V or less,
the protective circuit is triggered and
the power-saving mode is accessed.
Power supply
15k
8k
GND
15pin
13pin
10pin
14pin
12pin
9pin
Vcc
DVD27 harman/kardon
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