Harman Kardon DVD 27 Service Manual page 72

DVD27
Multimedia ICs
•
Pin descriptions and input / output circuits
Pin. No Pin name IN
K
1 MUTE
2 INA
K
4 INB
7 INC
3
5
GND —
8
14 OUTA2
12 OUTB2
9 OUTC2
—
15 OUTA1
13 OUTB1
10 OUTC1
16 V —
CC
Reference
OUT Equivalent circuit
voltage
— —
— —
— 0V
14pin
12pin
9pin
0.9V
K
0.95V
15pin
13pin
10pin
— 5.0V
15k
8k
GND
Vcc
72
harman/kardon
BA7660FS
Function
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.).
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