LG LPC-M140X, Service Manual

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LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes 2-15 2-16
PIN NO. SYMBOL DESCRIPTION VOLT(V) I/O
1 FM RF IN FM RF IN 0.7V I
2 RF GND GND for FM RF, FM OSC stage 0V
3 AM LOW CUT AM LOW CUT 0.6V
4 MIX OUT MIX OUT 4.1V O
5 AGC AM AGC 0.5V
6 VCC Vcc for AM, FM IF, FM MPX stage 4.3V
7 AM IF IN AM IF IN 3.7V I
8 FM IF IN FM IF IN 4.3V I
9 GND GND for AM, FM IF, FM MPX stage 0V
10 TUN LED Tuning LED 0V
11 ST LEC Stereo LED 0V
12 QUAD FM QUAD Detector 3.5V
13 R OUT R-ch Output 1.2V O
14 L OUT L-ch Output 1.2V O
15 LPF 1 LPF terminal for synchronous Detector 3.6V
16 LPF 2 LPF terminal for synchronous Detector 3.1V
17 MPX IN MPX IN 0.7V I
18 DET OUT DET OUT 0.9V 0
19 AFC AFC 0.5V
20 AM OSC AM OSC 4.3V
21 FM OSC FM OSC 4.6V
22 RF VCC Vcc for FM OSC stage 4.3V
23 FM RF OUT FM RF OUT 4.3V I
24 AM RF IN AM RF IN 4.3V I
• TUNER PART
1. TA2111N
• DECK PART.
1. AN7312
PIN NO. SYMBOL DESCRIPTION VOLT(V) I/O
1 GND 0V
2 ALC TIME ALC TIME constant 0V
3 ALC INPUT ALC input CH 1 0V I
4 Output 1 1.2V O
5 PHASE CH1 Phase compensation of CH 1 0V
6 NF NF of CH 1 1.2V
7 INPUT Input of CH 1 0V I
8 INPUT Input of CH 2 0V I
9 NF NF of CH 2 1.2V
10 PHASE CH2 Phase compensation of CH 2 0V
11 Output 2 1.2V O
12 ALC INPUT ALC input CH2 0V
13 TER Rippli filter 1.7V
14 VCC VCC 1.8V
PIN NO. SYMBOL DESCRIPTION VOLT(V) I/O
1 VCC Vcc 2 11.0V
2 OUT Out 1 5.7V
3 B.S B.S 1 10.0V
4 GND Pre-GND 0V
5 NF NF 1 0.5V
6 IN IN 1 0V
7 IN IN 2 0V
8 NF NF 2 0.5V
9 RIPPLE RIPPLE 6.0V
10 B.S B.S 2 10.0V
11 OUT OUT 2 5.8V
12 VCC Vcc 1 11.0V
• POWER PART.
1.UTC8227P
PIN NO. SYMBOL DESCRIPTION VOLT(V) I/O
1 S 10 I/O port 5/LCD segment output/CD processor function 0V
2 S 11 I/O port 5/LCD segment output/CD processor function 3.2V
3 S 12 I/O port 5/LCD segment output/CD processor function 0V
4 AD 1 I/O port 6/LCD segment output/CD processor function 0V
5 AD 2 I/O port 6/LCD segment output/CD processor function 0.5V
6 AD 3 I/O port 6/LCD segment output/CD processor function 0.4V
7 AD 4 I/O port 6/LCD segment output/CD processor function 3.2V
8 MVDD Power supply pins for the controller block 3.2V
9 MVSS Power supply pins for the controller block 0V
10 SCK 1 I/O port 1-0/serial clock input/output 1 NC
11 SDIO 1 I/O port 1-1/serial data input/output 1 0V
12 S11 I/O port 1-2/serial data input1/Cdprocessor function 0V
13 MUTE I/O port 1-3/ buzzer outut 0V
14 SCK 2 I/O port 7-0/serial clock input/output 2 0V
15 SDIO 2 I/O port 7-1/serial data input/output 2 2.8V
16 INTR I/O port 7-2/interrupt input/serial data input 2 NC
17 PDO Output pin for a phase error signal between the EFM, PLCK signals 1.6V
18 TMAX TMAX detection result output pin 0V
19 LPFN Inverted input pin for PLL low-pass filter amplifier 1.5V
20 LPFO Output pin for PLL low-pass filter amplifier 3.2V
21 VCOF VCO filter pin 0.9V
22 AVSS Ground pin for analog block 0V
23 SLCO DAC output pin for generation data slice level 1.5V
24 RFI RF signal input pin 1.6V
25 AVDD Power supply pin for analog block 3.2V
26 VRER Analog reference voltage pin 1.6V
27 RFZI RFRP zero-cross signal input pin 1.6V
28 RFRP RF ripple signal input pin 0.7V
• CD PART
1. TC94A58FAGP (DSP/MICOM IC)
GND
OUTPUT
OUTPUT
FIL
❏
IC/TR VOLTAGE & PIN DESCRIPTION