Ic601 (Bd3805F) - LG LAC5800(R) Service Manual

5. IC601 (BD3805F)

5-1. BLOCK DIAGRAM
22 21
DGND SDA
2
I BUS
Logic
Bass
fo: 60, 70, 80, 100, 120, 140, 160, 200Hz
Q: 0.5, 0.75, 1, 1.25
Treble
fo: 5, 7.5, 10, 12.5kHz
Middle
fo: 500Hz, 1kHz
Q: 1
VCC/2
AGND FIL
1 2
LGE Internal Use Only
20 19 18
SCL MUTE SEL
VCO
Tone
Pass
50k 50k
50k
50k
50k 50k
50k
50k
AP1 AN AP2
4 5
3
17 16 15 14
ADJ VCC
OUTF1 OUTR1 OUTF2 OUTR2
Fader Fader
(0~-58, (0~-58,
- dB) - dB)
Tone
Pass
Bass, Treble, Middle
(-15dB~+15dB, 1dB step)
Volume
(+23~-79dB, - dB
1dB step)
Input Gain
(0~15dB, 1dB step)
Mute
Input Selector
(4 stereo include 1 isolation input)
100k 100k 100k
B1 B2 C2
6 7 8 9
2-24 Copyright © 2008 LG Electronics. Inc. All right reserved.
13 12
Fader Fader
(0~-58, (0~-58,
- dB) - dB)
Bass, Treble, Middle
(-15dB~+15dB, 1dB step)
Volume
(+23~-79dB, - dB
1dB step)
Input Gain
(0~15dB, 1dB step)
Mute
100k 100k 100k
C2 D1 D2
10 11
Only for training and service purposes