LG LAC4710R User manual

CAR CD/MP3/WMA
RECEIVER
SERVICE MANUAL
MODEL : LAC4710R
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL .
MODEL: LAC4710R
SERVICE MANUAL
P/NO : AFN35097886 OCTOBER, 2007
Website http://biz.lgservice.com
Internal Use Only

1-1
CONTENTS
SECTION 1 SUMMARY
SERVICING PRECAUTIONS..........................................................................................................................................1-2
ESD PRECAUTIONS .......................................................................................................................................................1-3
SPECIFICATIONS.............................................................................................................................................................1-4
SECTION 2 ELECTRICAL
ELECTRICAL TROUBLESHOOTING GUIDE & WAVEFORMS .............................................................................2-1
1. MAIN, FRONT & TUNER PART................................................................................................................................2-1
2. CD PART.....................................................................................................................................................................2-4
• WAVEFORMS..............................................................................................................................................................2-7
INTERNAL BLOCK DIAGRAM OF ICs......................................................................................................................2-10
1. IC301 (HA13173AH) ................................................................................................................................................2-10
2. IC302 (BA00CCOWFP) ...........................................................................................................................................2-12
3. IC401 (µPD78F1164) ...............................................................................................................................................2-12
4. IC601 (BD3805F) .....................................................................................................................................................2-15
5. IC801 (TB2904HQ) ..................................................................................................................................................2-16
6. IC901 (PT6523) ........................................................................................................................................................2-17
BLOCK DIAGRAM .........................................................................................................................................................2-19
CIRCUIT DIAGRAMS.....................................................................................................................................................2-21
1. MAIN CIRCUIT DIAGRAM ......................................................................................................................................2-21
2. CDP CIRCUIT DIAGRAM........................................................................................................................................2-23
3. FRONT CIRCUIT DIAGRAM ..................................................................................................................................2-25
4. AUX CIRCUIT DIAGRAM ........................................................................................................................................2-27
5. LCD LIGHTING CIRCUIT DIAGRAM.....................................................................................................................2-28
PRINTED CIRCUIT DIAGRAMS..................................................................................................................................2-29
1. MAIN P.C.BOARD....................................................................................................................................................2-29
2. CDP P.C.BOARD .....................................................................................................................................................2-33
3. FRONT P.C.BOARD ................................................................................................................................................2-34
4. AUX P.C.BOARD......................................................................................................................................................2-35
5. LCD LIGHTING P.C.BOARD...................................................................................................................................2-35
SECTION 3 EXPLODED VIEWS
1. CABINET AND MAIN FRAME SECTION ................................................................................................................3-1
SECTION 4 REPLACEMENT PARTS LIST.............................................................4-1
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

1-2
1. Always disconnect the power source before:
1) Removing or reinstalling any component, circuit board, module or any other instrument assembly.
2) Disconnecting or reconnecting any instrument electrical plug or other electrical connection.
3) Connecting a test substitute in parallel with an electrolytic capacitor in the instrument.
CAUTION: A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an
explosion hazard.
2. Do not defeat any plug/socket B+ voltage interlocks with which instruments covered by this service
manual might be equipped.
3. Do not apply power to this instrument and or any of its electrical assemblies unless all solid-state
device heat sinks are correctly installed.
4. Always connect a test instrument’s ground lead to the instrument chassis ground before connecting
the test instrument positive lead. Always remove the test instrument ground lead last.
1) The service precautions are indicated or printed on the cabinet, chassis or components. When servicing,
follow the printed or indicated service precautions and service materials.
2) The Components used in the unit have a specified conflammability and dielectric strength. When replacing
any components, use components which have the same ratings. Components marked in the circuit diagram
are important for safety or for the characteristics of the unit. Always replace with the exact components.
3) An insulation tube or tape is sometimes used and some components are raised above the printed writing
board for safety. The internal wiring is sometimes clamped to prevent contact with heating components.
Install them as they were.
4) After servicing always check that the removed screws, components and wiring have been installed correctly
and that the portion around the service part has not been damaged. Further check the insulation between
the blades of attachment plug and accessible conductive parts.
SERVICING PRECAUTIONS
SECTION 1 SUMMARY
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

1-3
ESD PRECAUTIONS
Electrostatically Sensitive Devices (ESD)
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components
commonly are called electrostatically sensitive devices (ESD). Examples of typical ESD devices are
integrated circuits and some field-effect transistors and semiconductor chip components. The following
techniques should be used to help reduce the incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain
off any electrostatic charge on your body by touching a know earth ground. Alternatively, obtain and
wear a commercially available discharging wrist strap device, which should be removed for potential
shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive
surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static"
can generate electrical charges sufficient to damage ESD devices.
5. Do not use freon-propelled chemicals These can generate electrical charges sufficient to damage ESD
devices.
6. Do not remove a replacement ESD device from its protective package until immediately before you are
ready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together
by conductive foam, aluminum foil or comparable conductive materials).
7. Immediately before removing the protective material from the leads of a replacement ESD device, touch
the protective material to the chassis or circuit assembly into which the device will by installed.
CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL
OTHER SAFETY PRECAUTIONS.
8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless
motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor
can generate static electricity sufficient to damage an ESD device).
CAUTION. GRAPHIC SYMBOLS
THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL. WITHIN AN EQUILATERAL
TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE
OF UNINSULATED "DANGEROUS VOLTAGE" THAT MAY BE OF SUFFICIENT
MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK.
THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENED TO
ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY
INFORMATION IN SERVICE LITERATURE.
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

1-4
SPECIFICATIONS
• GENERAL
Output Power 50W x 4CH (Max.)
Power Source DC 12V
Speaker impedance 4Ω
Ground System Negative
Dimensions (W x H x D) 180 x 51 x 171mm (Without Control Panel)
Net Weight 2.0kg
• CD SECTION
Frequency Response 20Hz ~ 20kHz
S/N Ratio 80dB
Distortion 0.12%
Channel Separation (1kHz) 55dB
• RADIO SECTION
FM
Frequency Range 65 ~ 74, 87.5 ~ 107.9 or 87.5 ~ 108MHz
S/N Ratio 53dB
Distortion 0.7%
Usable Sensitivity 12dBµV
AM (MW)
Frequency Range 520 ~ 1720 or 522 ~ 1620kHz
S/N Ratio 45dB
Distortion 1.0%
Usable Sensitivity 28dBµV
• AUX SECTION
Frequency Response 20Hz ~ 20kHz
S/N Ratio 80dB
Distortion 0.1%
Channel Separation (1kHz) 45dB
Max Input Level (1kHz) 1.1V (35KΩ)
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

2-1
1. MAIN, FRONT & TUNER PART
No Symptom Check Point Location No.
SYSTEM CONTROL
1No Power Checked the Fuse. CN801
Checked the Back up Vdd, Gnd. CN801(16,15)
Checked the Micom Back Up Vdd. IC301(14), D307, IC401(30,47,50,99,100)
Checked the Micom Ground. IC401(20,51,97,98)
Checked the Reset. IC402, IC401(90)
Checked the X-tal. X401, X402
Checked the ACC in. Q301, Q302, IC401(38), CN801(14)
Checked the detachable switch. SW401, IC401(73)
Checked the flipdown Detector. CN901(19), IC401(74)
Checked the Key line. IC401(52,53)
2Not available Remocon Checked the Remocon Sens Vdd. CN901(14), Q316, Q317, D307
Checked the Remocon Sens line. RM901, IC401(5)
3Not available to Volume control Checked the Encoder Volume. SW901, IC401(40,41)
4Not available to Key Control Checked Tact switch. SW902 ~ SW918
Checked Key line. IC410(52,53)
5No sound Checked the E-VR Vdd. IC301(10), IC601(16)
Checked the E-VR Ground. IC601(1,22)
Checked the E-VR control. IC601(22,23), IC401(1,2)
Checked the E-VR Signal in/out. IC601(3,5,6,7,10,11)
IC601(12,13,14,15)
Checked the E-VR Mute Control IC601(19), IC401(6)
* Power IC Checked the Power IC Vdd. IC801(6,20)
: Refer to next page Checked the Power IC Ground. IC801(1,2,8,13,18,24)
Checked the Power IC Control. IC801(4, 22), IC401(3,10)
Checked the Power IC Signal in/out. IC801(11,12,14,15)
IC801(3,5,7,9,17,19,21,23)
Checked the Power IC Mute. IC801(22)
Checked the Power IC Standby. IC801(4)
Checked the Power IC Ripple. IC801(10)
Checked the Main Connector. CN801(1,2,3,4,8,9,12,13)
6No Line out signal Checked the E-VR Vdd. IC301(10), IC601(16)
Checked the E-VR Ground. IC601(1,22)
Checked the E-VR control. IC601(20,21), IC401(1,2)
Checked the E-VR Signal in/out. IC601(3,5,6,7,10,11)
IC601(12,13,14,15)
Checked the Line out Mute circuit Q705, IC401(48)
Check the Line out Jack CN703
8Heard Pop Noise Checked the Mute Control. IC601(19), IC801(4,22), IC401(3,6,10)
Checked the AF Mute. TU101(19), IC401(4)
9Not avaliable to Telephone Mute Checked the telephone Mute Control. CN801(5), Q305, Q306, IC401(62)
Checked the Mute Control. IC601(19), IC801(4,22), IC401(3,6,10)
10 Not avaliable to ANT(Motor Type) Control Checked the ANT Control. IC301(12,13), IC401(87)
11 Not avaliable to Remote Checked the Remote control. CN801(6), IC402(1,2,4), Q308, Q309
(External AMP) IC401(63,64)
12 No output Beep sound. Checked the Beep Control. IC401(80)
ELECTRICAL TROUBLESHOOTING GUIDE & WAVEFORMS
SECTION 2 ELECTRICAL
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

2-2
CAUTION - Tip for repair
Before exchange power amp IC(TB2904) for no audio problem, you have to check
below list.
1. Check VCC (pin 20, 6) & GND
2. Check input pin 11, 12, 14, 15
3. Check Standby, pin 4
: Follow the below list.
4. Check Mute function, pin 22
: Follow the below list.
5. Check Ripple pin 10.
: Normally it is high (about 10V)
6. Re-soldering all the pin of IC.
: Prevent crack of solder line.
* Keep changed IC, We request that you send it to HQ.
RL
RL
RL
11
9
8
7
5
2
3
17
18
19
21
24
23
12
15
14
120 6
RL
IN1
IN2
IN3
IN4
13
C1
C1
C1
C1
PRE-GND
10 25 22
OUT1 +
+
+
+
-
-
-
-
()
PW-GND1
OUT1 ( )
OUT2 ( )
PW-GND2
OUT2 ( )
OUT3 ( )
PW-GND3
OUT3 ( )
OUT4 ( )
PW-GND4
OUT4 ( )
TAB VCC1 VCC2
C3
C4
C2
: PRE-GND
: PW-GND
STBYRIP MUTE
C5
16
C6
4
OFF-SET
DET
MUTE
PLAY
5 V
R1
A
C-GND
Stand-by Power Sound Voltage
ON OFF OFF 0 to 1.5
OFF ON ON 3.5 to 6V
Mute Sound Voltage
ON OFF 0 to 1.5
OFF ON 3.5 to 6V
Picture 1) Power IC desc.
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

2-3
No Symptom Check Point Location No.
DISPLAY & LIGHTING
1No Display or Checked the LCD DRV Vdd. Q322, Q316, Q317
Some Display is broken IC901(58,59)
Checked the LCD DRV Ground. IC901(60)
Checked the LCD DRV OSC. IC901(61)
Checked the LCD DRV control. IC401(75,79,85,86),
IC901(57,62,63,64)
Checked the LCD DRV to LCD Pattern.
IC901(1 ~ 55)
2No LCD Lighting or Checked the LCD Lighting VDD. Q319, Q320, Q322, IC301(4,9)
Color is different IC401(64)
Checked the LED. LD930, LD931
3Not avaliable to LCD Lighting Checked the LCD Lighting Control. CN801(11), Q303, Q304, Q321,
control IC401(58)
Checked the LED. LD930, LD931
4No Key Lighting Checked the LED Lighting Vdd. IC301(4,9), IC401(64)
Checked the LED. LD901 ~ LD923
5Don't moved Level bar Checked the Level Meter control. IC401(54,57)
6Not avaliable to Dimmer control Chekced the Dimmer control. CN801(11), Q303, Q304, IC301(4,9)
No Symptom Check Point Location No.
TUNER FUNCTION
1Not available to Tuner Checked the Tuner Vdd. TU101(4,16), IC301(10), IC401(39)
Q350, Q351
Checked the Tuner Ground. TU101(3, 5,10,17)
Checked the PLL data. TU101(11,12,13,14,15)
IC401(67,68,44,45,46)
Checked the RF signal in. TU101(1, 2)
Checked the S-Meter control. TU101(7)
Checked the SD & ST IND. TU101(6)
2 Tuner no sound Checked the Tuner Signal out. TU101(8,9), IC601(6,7)
Checked the AF mute. TU101(19), IC401(4)
3Not available to RDS Checked the RDS data. TU101(20,21), IC401(65,83)
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

2-4
Something wrong with the CD player?
No loading?
OK
YES
CN510(13, 6)
YES
NO
Checked the CD Vdd?
IC506(26, 32, 47, 78, 18)
YES
NO
Checked the CD DSP ground?
IC504(7, 8, 20)
YES
NO
Checked the motor DRV
VDD?
IC506(72)
YES
NO
Checked the CD DSP reset?
X503
YES
NO
Checked the CD DSP X-tal?
CN509(15)
YES
NO
Fig 3, 4
Fig 1, 2
Fig 1, 2
Checked the disc in
load switch?
CN509(12, 17)
IC513(12, 14, 15)
YES
NO
Checked the loading
motor control?
CN509(10)
YES
NO
Checked the 8/12cm
sens switch?
2. CD PART
A B C
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

2-5
No reading & "FILE CHECK"
DISPLAY?
OK
YES
CN509(8)
YES
NO
Fig 1, 2
Fig 3, 4
Fig 10, 11
Fig 5
Fig 5
Fig 9
Fig 8
Fig 7
Fig 13
Fig 6
Checked the limit switch?
CN509(16)
YES
NO
Checked the motor DRV
mute control?
D5, D6
YES
NO
Checked the motor
LD control?
IC506(67, 68, 69, 70, 71)
YES
NO
Checked the CD DSP control?
IC506(25)
IC513(17, 18)
YES
NO
Checked the focus control?
IC506(25)
R517
YES
NO
Checked the focus error
level out.(FE mon)?
IC506(54)
YES
NO
Checked the PLL locking.
(FSEQ)?
IC506(41, 16)
YES
NO
Checked the RF signal
out check?
IC506(21)
IC513(8, 5)
YES
NO
Checked the spindle
motor control?
PN504(5, 6)
YES
NO
Checked the TRVP control?
IC506(24)
IC513(19, 20)
YES
NO
Checked the tracking control?
A
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

2-6
Fig 3, 4
No ejected the CD?
OK
YES
CN901(16) [MAIN]
YES
NO
Checked the Eject key?
YES
D6, D5
NO
Checked the loading motor
control?
B
CD no sound?
OK
YES
IC506(56, 59)
NO
Checked the DSP
signal out?
YES
C
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

2-7
• WAVEFORMS
Fig 1) Switching condition for loading
CN509:[PIN15]
CN509:[PIN10]
CN509:[PIN8]
LOADING S/W
12/8 S/W
LIMIT S/W
Fig 2) Switching condition for unloading
CN509:[PIN15]
CN509:[PIN10]
CN509:[PIN8]
LOADING S/W
12/8 S/W
LIMIT S/W
Fig 3) Motor control signal for loading
REW
FEW
SLED CON
LOADING IN
IC504:[PIN13]
IC504:[PIN14]
R5091:[SLED CON]
R5465:[LOAD IN]
SL-
SL+
SLED CON
LOADING IN
Fig 4) Motor control signal for unloading
REW
FEW
SLED CON
LOADING IN
IC504:[PIN13]
IC504:[PIN14]
R5091:[SLED CON]
R5465:[LOAD IN]
SL-
SL+
SLED CON
LOADING IN
D6:[REW]
D5:[FEW]
R5091:[SLED CON]
R5465:[LOAD IN]
D6:[REW]
D5:[FEW]
R5091:[SLED CON]
R5465:[LOAD IN]
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

2-8
Fig 5) Focus control signal
PN501:F-[PIN14]
IC506:FOP[R511]
R517:FE
PN501:F+[PIN15]
FOP
F+
F-
FE
Fig 6) Tracking control signal
IC506:TRP[R5013]
PN501:T+[PIN13]
PN501:T - [PIN16]
R517:TE
TRP
T+
T-
TE
Fig 7) Spindle control signal
PLLF
SP+
SP-
SPOUT
Fig 8) PD, RFOUT
Fig 9) CLK, REQ & DATA
PD/MD
RFOUT
LOADING IN
IC506:CLK[PIN52]
IC506:REQ[PIN53]
IC506:DATA[PIN54]
CLK
REQ
DATA
IC506:PLLF:[PIN54]
IC504:SP+[PIN11]
IC504:SP-[PIN12]
IC506:SPOUT[PIN21]
IC506:PD[41]
IC506:RFOUT[46]
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

2-9
Fig 10) MLD, MDATA & MCLK
MLD
MCLK
MDATA
IC506:MLD
[PIN58]
IC506:MCLK
[PIN70]
IC506:MDATA
[PIN72]
MLD
MCLK
MDATA
Fig 11) STAT, MDATA & NRST
NRST
STAT
MDATA
IC506:NRST
[PIN57]
IC506:STAT
[PIN71]
IC506:MDATA
[PIN48]
STAT
NRST
MDATA
Fig 12) SLED control
SL-
SL+
SL+
IC506:NRST
[PIN57]
IC506:STAT
[PIN71]
IC506:MDATA
[PIN48]
IC504:[PIN13]
IC504:[PIN14]
R5091:[SLED CON]
R5465:[LOAD IN]
IC506:MLD
[PIN58]
IC506:MCLK
[PIN70]
IC506:MDATA
[PIN72]
TRVP
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

2-10
INTERNAL BLOCK DIAGRAM OF ICs
1. IC301 (HA13173AH)
1-1. BLOCK DIAGRAM
GND
BIAS
VB
+B
VDDOUT
AUDIOOUT
ILMOUT
CTL 1
GND
TAB
VREF
1.5V
Over voltage detect
TSD
VREF
CDOUT
VREF
EXTOUT
VBUP
DSPOUT
CTL 2
2.5V
CTL 3
2.5V
CTL 4
2.5V
15
FREG F
RFREG3
FREG B
13
12
11
10
9
8
7
6
5
4
3
2
1
14
3.5V
DBUP
CBUP
100uF
CVDD
10uF
CDSP
10uF
CAUDIO
10uF
CCD
0.1uF
CEXT
10uF
CILM
0.1uF
CFREG
10uF
QFREG
RFREG1
RFREG2
DEXT1
DEXT2
C1
100uF
C2
0.1uF
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

2-11
1-2. PIN FUNCTION (Note1)
1GND Ground - - - -
2FREG_B External Trs bass drive (Note4) On/Off On/Off Off Off
3FREG_F FREG feedback terminal On/Off On/Off Off Off
4ILMOUT 8.4V output for JLM/500mAmax On/Off Off Off Off
5CTL4 FREG control terminal - - - -
6CDOUT 8.0V output for CD/1.3Amax (Note4) On/Off Off Off Off
7DSPOUT 3.3V output for DSP/250mAmax (Note4) On/Off Off Off Off
8VB Battery - - - -
9CTL3 ILM control terminal - - - -
10 AUDIOOUT 8.4V output for AUDIO/500mAmax (Note4) On/Off Off Off Off
11 CTL1 DSP, CD, Audio control terminal - - - -
12 EXTOUT High side output/600mAmax (Note4) On/Off Off Off Off
13 CTL2 EXT control terminal - - - -
14 VDDOUT 5.7V output for micro controller (Note4) On On On Off
15 VBUP Back up - - - -
Note1. In the uper table. “On” means always On. “Off” means compulsory Off and “On/Off” means that it can control by control
terminal.
Note2. Thermal protection circuit
Abuilt-in thermal protection circuit (TSD:Thermal shut down) prevents thermal damage to the IC. All outputs except
VDD(pin14) and FREG (pin2&3) are switched off when the circuit operates, revert to the original state when the
temperature drops to a certain level.
Note3. Overvoltage protection circuit
The overvoltage protection circuit (surge protector) turns off all outputs without Vdd, when VB voltage is more than
about 21V. And the overvoltage protection circuit (surge protector) turns off Vdd output with other all outputs, when
VB voltage is more than about 26V. When the overvoltage protection operates on VB>=18V condition, the stand by
current increases.
Note 4. Overcurrent protection circuit
FREG_B (pin2), ILMOUT (pin4), CDOUT (pin6), DSPOUT (pin7), AUDIOOUT (pin10), EXITOUT (pin12), VDDOUT
(pin14) output circuits are built-in overcurrent protection circuit based on the respective output current. These
overcurrent protection circuits limit the current with a curve shape of “7” in the voltage-current graph. This prevents IC
destruction due to overcurrent.
Normal
operation
Protection function
Pin No.
Pin name Function (Note2) (Note3) (Note3)
TSD On VB=24V VB=50V
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

2-12
2. IC302 (BA00CCOWFP)
2-1. BLOCK DIAGRAM 2-2. PIN NO., PIN NAME
3. IC401 (µPD78F1164)
3-1. PIN CONFIGURATION
PEXLVI(I)
PFLMD0_CTR(O)
PRDS_CLK(I)
PFRT_DO(O)
PFRT_DI(I)
PFRT_CLK(O)
PANT(O)
DOWNLOAD_CLK
DOWNLOAD_IO
RESET
SUB_CLK(32.768Khz) SUB_CLK(32.768Khz)
FLMD0
X’TAL(19.2,Mhz)
X;TAL(19.2Mhz)
REGC
Vss
EVss
Vdd
EVdd
AVref0 PTUNER_MUTE(O) PLINE_MUTE(O) AVref PPLL_CLK(I) PPLL_DI(I) PPLL_DO(O) PUSB_TX/PBT_TX(O) PUSB_RX/PBT_RX(I) PVOLB(I) PVOLA(I) PACC_OUT(O) PACC_IN(I) POPT_OUT2(O) POPT_OUT1(O) POPT_OUT0(O) POPT_IN2(I) POPT_IN1(I) POPT_IN0(I) PUSB_PROTECT(I)
PBEEP(O)
PFRT_CE(I)
PCDP_CLK(O)
PCDP_DI(I)
PCDP_DO(O)
PFRT_RST(O)
PFRT_OPEN(I)
PFRT_DETECT(I)
PART_TX(O)
PART_RX(I)
PART_EN(I)
PSD_ST(I)
PPLL_CE(O)
PEEPROM_CE(O)
PDIM_IN(I)
PRDS_DI(I)
PPWR(O)
PREMOTE(O)
PTEL_MUTE(I)
PAUDIO_MUTE(O)
PAUX_MUTE(O)
PLIGHT(O)
PDIM_OUT(O)
PEJECT(I)
PQUALTY(I)
PSMETER(I)
PLEVEL_METER(I)
PKEY2(I)
PKEY1(I)
AVss
PEV_CLK(O)
PEV_CE(O)
PPWR_MUTE(O)
PAF_MUTE(O)
PRMC(I)
PSOFT_MUTE(O)
PEALA_SW1(O)
PEALA_SW2(O)
PSPEC_CLK(O)
PSTANDBY(O)
PDECK_LD(I)
PCDP_BLK(I)
PCDP_VDET(I)
PCDP_POWER(O)
PDECK_INN(I)
PDECK_12/8(I)
PSLED_CTRL(O)
PRCP_FEW(O)
PCDP_REW(O)
EVss1
PDRV_MUTE(O)
PDAC_MUTE(O)
PCDP_RST(O)
PCDP_MLD(O)
PZERO_MUTE(I)
PISP(O)
PUSB_POWER/PBT_POWER(O
)
PUSB_SW(I)
PUSB_RESET(O)
EVdd1
uPD78F1164
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

2-13
3-2. PIN DESCRIPTION
Pin Name in Micom Name in Model Enable I/O I/O setted Output Format Description
1P60/SCL0 PEV_CLK I/O O N-CH Clock output to TDA7419 for the volume control
2P61/SDA0 PEV_DE I/O O N-CH Data output to TDA7419 for the volume control
3P62 PPWR_MUTE I/O O N-CH To Power amp, "MUTE" command output
4P63 PAF_MUTE I/O O N-CH AF mute
5 P31/TI03/TO03/INTP4 PRMC I/O I - Remocon input
6P64/RD' PSOFT_MUTE I/O O CMOS Direct volume mute signal output
7P65/WR0' PEJECT I/O I - Eject key input
8P66/WR1' PEALA_SW2 I/O O CMOS EALA control output 2
9P67/ASTB PSECP_CLK I/O O CMOS Spectrum analyze clock output to TDA7419
10 P77/EX23/KR7/INTP11 PSTANDBY I/O O CMOS To PowerR amp, "STAND-BY" command output
11 P76/EX22/KR6/INT10 PDECK_LD I/O I - Deck load SW
12 P75/EX21/KR5/INT9 PCDP_IBLK I/O I - SubQ ack
13 P74/EX20/KR4/INTP8 PCDP_VDET I/O I - Vibration detection
14 P73/EX19/KR3 PCDP_POWER I/O O CMOS CDP power on
15 P72/EX18/KR2 PDECK_INN I/O I - Deck inner SW
16 P71/EX17/KR1 PDECK_12/8 I/O I - Deck 2cm disc detect SW
17 P70/EX16/KR0 PSLED_CTRL I/O O CMOS Deck sled/Loading motor selector
18 P06/WAIT' PCDP_FEW I/O O CMOS Loading motor loading
19 P05/CLKOUT PCDP_REW I/O O CMOS Loading motor unloading
20 EVSS1 - Ground Potential for Ports
21 P80/EX0 PDRV_MUTE I/O O CMOS Deck driver IC mute
22 P81/EX1 PDAC_MUTE I/O O CMOS DAC mute
23 P82/EX2 PCDP_RST I/O O CMOS CDP reset
24 P83/EX3 PCDP_MLD I/O O CMOS DSP ACK
25 P84/EX4 PZERO_MUTE I/O I - DAC zero mute monitor
26 P85/EX5 PISP I/O O CMOS USB Flash upgrade enable
27 P86/EX6 PUSB_POWER(PBT) I/O O CMOS USB power on/BT power on(3.3V Ctrl)
28 P87/EX7 PUSB_SW I/O I - USB device detect sw
29 P30/INTP3/RTC1HZ PUSB_RESET I/O O CMOS OTG reset
30 EVDD1 - Positive power supply for ports
31 P50/EX8 PUSB_PROTECT I/O I - Protection IC overcurrent detection
32 P51/EX9 POPT_IN0 I/O - For diode option check, signal 1 or 2 input0
33 P52/EX10 POPT_IN1 I/O I - For diode option check, signal 1 or 2 input1
34 P53/EX11 POPT_IN2 I/O I - For diode option check, signal 1 or 2 input2
35 P54/EX12 POPT_OUT0 I/O O CMOS For diode option check, signal 1 output
36 P55/EX13 POPT_OUT1 I/O O CMOS For diode option check, signal 2 output
37 P56/EX14 POPT_OUT2 I/O O CMOS For diode option check, signal 3 output
38 P57/EX15 PACC_IN I/O I - ACC in
39 P17/EX31/TI02/TO02 PACC_OUT I/O O CMOS ACC out
40 P16/EX30/TI01/TO01/INTP5 PVOLA I/O O CMOS Encoder volume terminal #A input
41 P15/EX29/RTCDIV/RTCCL PVOLB I/O O CMOS Encoder volume terminal #A input
42 P14/EX28/RxD3 PUSB_RX/PBT_RX I/O I - Data input for USB/BT
43 P13/EX27/TxD3 PUSB_TX/PBT_TX I/O O CMOS Data output for USB/BT
44 P12/EX26/SO00/TxD0 PPLL_DO I/O O CMOS Data output for PLL IC
45 P11/EX25/SI00/RxD0 PPLL_DI I/O I - Data input for PLL IC
46 P10/EX24/SCK00' PPLL_CLK I/O O CMOS CLK output for PLL IC
47 AVREF1 -
• A/D converter reference voltage input
• Positive power supply for P20 to P27, P150 to
P157, and A/D converter
48 P110/ANO0 PLINE_MUTE I/O O CMOS Line out mute
49 P111/VNO1 PTUNER_MUTE I/O O CMOS Tuner <----> VR IC mute
50 AVREF0 -
• D/A converter reference voltage input
• Positive power supply for P110, P111, and D/A converter
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

2-14
Pin Name in Micom Name in Model Enable I/O I/O setted Output Format Description
51 AVSS
52 P157/ANI15 PKEY1 I/O I - Key #1 line input
53 P156/ANI14 PKEY2 I/O I - Key #2 line input
54 P155/ANI13 PLEVEL_METER I/O I - Level meter input
55 P154/ANI12 PSMETER I/O I - Radio station's strength signal input
56 P153/ANI11 PQUALTY I/O I - Connect to tuner pack QUALITY
57 P152/ANI10 PLVL_MTR_CD_AUX I/O I - Level meter input(CD,AUX)
58 P151/ANI9 Bt Detect I/O I - Backup voltage Detect
59 P150/ANI8 PLIGHT I/O O CMOS Backlight control output
60 P27/ANI7 PAUX_MUTE I/O O CMOS AUX mute
61 P26/ANI6 PAUDIO_MUTE I/O O CMOS VR IC <--> PWR AMP mute
62 P25/ANI5 PTEL_MUTE I/O O CMOS Telephone mute input
63 P24/ANI4 PREMOTE I/O O CMOS External amp on
64 P23/ANI3 PPWR I/O O CMOS Power on
65 P22/ANI2 PRDS_DI I/O I - From tuner pack, RDS data input
66 P21/ANI1 PDIM_IN I/O I - Dimmer input
67 P20/ANI0 PEEPROM_CE I/O O CMOS EEPROM Chip select
68 P130 PPLL_CE O O CMOS PLL chip select
69 P131/TI06/TO06 PSD_ST I/O I - SD level input from Tuner pack
70 P04/SCK10'/SCL1 PART_EN I/O O - ART Enable input
71 P03/SI10/RxD1/SDA1 PART_RX I/O I - Data input for ART
72 P02/SO10/TXD1 PART_TX I/O I CMOS Data output for ART
73 P01/TO00 PFRT_DETECT I/O I - Front detaching/attaching detect
74 P00/TI00 PFRT_OPEN I/O I - Front open/close detect
75 P145/TI07/TO07 PFRT_RST I/O O CMOS Front micom(LCD drv) reset
76 P144/SO20/TxD2 PCDP_DO I/O O CMOS Data output for CDP
77 P143/SI20/RxD2/SDA2 PCDP_DI I/O I - Data input for CDP
78 P142/SCK20'/SCL2 PCDP_CLK I/O O CMOS CLK output for CDP
79 P141/PCLBUZ1/INTP7 PFRT_CE I/O I - Data enable output to front micom(LCD drv)
80 P140/PCLBUZ0/INTP6 PBEEP I/O O CMOS Buzzer output
81 P120/INTP0/EXLVI PEXLVI I/O I - Low voltage detector(Connect to Vdd)
82 P47/INTP2 PFLMD0_ CTR I/O O CMOS Disc download FLMD0 control(Connect to
FLMD0(Pin93))
83 P46/INTP1/TI05/TO05 PRDS_CLK I/O I - From tuner pack, RDS data input
84 P45/SO01 PFRT_DO I/O O CMOS Data output to front micom(LCD drv)
85 P44/SI01 PTUNER_MUTE I/O I - TUNER Mute
86 P43/SCK01' PFRT_CLK I/O O CMOS CLK output to front micom(LCD drv)
87 P42/TI04/TO04 PANT I/O O CMOS Antena control output
88 P41/TOOL1 Download_CLK I/O - - CLK for onboard debugger
89 P40/TOOL0 Download_IO I/O - - Data I/O for flash memory programmer
(Pull-up register(10K))
90 RESET' - - - - System reset input
91 P124/XT2 - I I - Sub clock 32.768 KHz
92 P123/XT1 - I I - Sub clock 32.768 KHz
93 FLMD0 - Flash memory programming mode setting
94 P122/X2/EXCLK - I I - X-tal 19.2 MHz
95 P121/X1 - I I - X-tal 19.2 MHz
96 REGC - - Connect to VSS via a capacitor (0.47 to 1µF)
97 VSS - Ground
98 EVSS0 - Ground Potential for Ports
99 VDD - Positive power supply (+5V)
100 EVDD0 - Positive power supply (+5V) For Ports
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

2-15
4. IC601 (BD3805F)
4-1. BLOCK DIAGRAM
1110987654
3
21
100k
D2
100k
D1
100k
C2
100k
C2
100k
B2
100k
B1
DGND
I2BUS
Logic VCO
SDA SCL SEL ADJ VCC OUTF1 OUTR1 OUTF2 OUTR2 MUTE
Fader
(0~-58,
- dB)
Fader
(0~-58,
- dB)
Fader
(0~-58,
- dB)
Fader
(0~-58,
- dB)
To n e
Pass
Bass, Treble, Middle
(-15dB~+15dB, 1dB step)
Volume
(+23~-79dB, - dB
1dB step)
Bass, Treble, Middle
(-15dB~+15dB, 1dB step)
Tone
Pass
Input Gain
(0~15dB, 1dB step)
Mute
Volume
(+23~-79dB, - dB
1dB step)
Input Gain
(0~15dB, 1dB step)
Mute
Input Selector
(4 stereo include 1 isolation input)
AGND FIL AP1 AP2AN
VCC/2
50k
50k 50k
50k 50k
50k
50k
50k
Bass
fo: 60, 70, 80, 100, 120, 140, 160, 200Hz
Q: 0.5, 0.75, 1, 1.25
Middle
fo: 500Hz, 1kHz
Q: 1
Tr e b l e
fo: 5, 7.5, 10, 12.5kHz
22 21 20 19 18 17 16 15 14 13 12
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only