LG MAX221UB Service Manual

2-13
CIRCUIT VOLTAGE CHART
IC101
PIN PIN NAME
Voltage
AM Mode FM Mode
1 AMRFIN 2.884 -
2 AMRFDEC 4.175 -
3 FMIN2 - 3.1
4 FMIN1 - 3.1
5 GNDRF - -
6 VCC2 8.3 8.3
7 AMRFAGC 0 0.2
8 LOUT 3.8 3.8
9 ROUT 3.8 3.8
10 GNDAUD - -
11 AMIFAGC2 0 0
12 MPXIN 3.6 3.6
13 MPXOUT 3.6 3.6
14 RSST 0.67 0.6
15 XTAL2 5.9 5.9
16 XTAL1 5.9 5.9
17 GNDD - -
18 SCL 4.9 4.9
19 SDA 4.9 4.9
20 VREF 3.9 3.9
21 VREGSUP 6.9 6.9
22 VCC1 8.3 8.3
23 GND - -
24 VCODEC 5.6 5.6
25 PLL - -
26 PLLREF 2.2 2.2
27 TEST - -
28 AMSELIN1 0.018 -
29 AMSELIN2 0.018 -
30 AMIFAGC1 1.3 -
31 AMSELOUT1 8.3 -
32 AMSELOUT2 8.3 -
IC601
PIN PIN NAME Voltage
1 A1 4.183
2 A2 4.185
3 B1 4.184
4 B2 4.184
5 C1 4.18
6 C2 4.18
7 DP1 4.13
8 DN 4.13
9 DP2 4.13
10 EP1 4.13
11 EN1 4.13
12 EN2 4.13
13 EP2 4.13
14 MIN 4.2
15 MUTE 5
16 LRST 0
17 LOUT 0
18 OUTS2 4.22
19 OUTS1 4.22
20 OUTR2 4.22
21 OUTR1 4.2
22 OUTF2 4.2
23 OUTF1 4.2
24 VCC 8.43
25 SCL 5
26 SDA 5
27 GND 0
28 FIL 4.2
IC804
PIN PIN NAME Voltage
1 TAB 0
2 PW-GND2 0
3 OUT2(-) 6.88
4 STBY 4.997
5 OUT2(+) 6.88
6 VCC2 14.38
7 OUT1(-) 6.89
8 PW-GND1 0
9 OUT1(+) 6.87
10 RIPPLE 6.77
11 IN1 6.81
12 IN2 6.8
13 PRE-GND 0
14 IN4 6.81
15 IN3 6.82
16 AC-GND 6.87
17 OUT3 6.9
18 PW-GND3 0
19 OUT3(-) 6.92
20 VCC1 14.39
21 OUT4(+) 14.38
22 MUTE 4.12
23 OUT4(-) 6.92
24 PW-GND4 0
25 OFFSET/SHORT 0
IC801
PIN PIN NAME Voltage
1 ILL 8.42
2 GND 0
3 CD 8 V 8.1
4 CTL1 4.661
5 AUDIO 8.4 V 8.43
6 CTL2 2.98
7 DSP 3.3 V 3.3
8 CTL3 0
9 USB F/B 0
10 USB CTL 1300 mA 14.37
11 EXT 14.38
12 USB SENS 4.11
13 VDD 5.7 V 5.65
14 VCC 14.12
15 BACK UP 14.38

LG MAX221UB Specifications

General

Brand	LG
Model	MAX221UB
Category	Receiver
Language	English