Service Manual
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...Setting 109 11.2 Tx Test 111 11.3 RX Test 112 12. Receiver Trouble 71 4.12 Speaker Trouble 73 4.13 Headphone Trouble 75 4.14 Charging Trouble 77 4.15 FM Radio Trouble 79 5. BLOCK DIAGRAM 88 7. ENGINEERING MODE 95 9.1 About Engineering Mode 95 9.2 Access Codes 95 9.3...DCXO 24 3.4 RTC(32.768KHz Crystal 25 3.5 LCD Interface(3-wire SPI interface) .......26 3.6 SIM Card Interface 28 3.7 KEYPAD Interface 29 3.8 Battery Charging Block Interface ...........30 3.9 RF Interface 31 3.10 Audio Interface 33 3.11 Key LED Interface 37 3.12 Vibrator Interface 38 3.13 Memory Interface 39 3....
...Setting 109 11.2 Tx Test 111 11.3 RX Test 112 12. Receiver Trouble 71 4.12 Speaker Trouble 73 4.13 Headphone Trouble 75 4.14 Charging Trouble 77 4.15 FM Radio Trouble 79 5. BLOCK DIAGRAM 88 7. ENGINEERING MODE 95 9.1 About Engineering Mode 95 9.2 Access Codes 95 9.3...DCXO 24 3.4 RTC(32.768KHz Crystal 25 3.5 LCD Interface(3-wire SPI interface) .......26 3.6 SIM Card Interface 28 3.7 KEYPAD Interface 29 3.8 Battery Charging Block Interface ...........30 3.9 RF Interface 31 3.10 Audio Interface 33 3.11 Key LED Interface 37 3.12 Vibrator Interface 38 3.13 Memory Interface 39 3....
Service Manual
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...fraud, the unauthorized use of own system. There are may temporarily disconnect service as long as specifically noted in substantial additional charges for the security of telecommunications system by the manufacturer or its communications facilities or procedure. Incidence of Harm If a telephone ...network, the telephone company is faulty and possibly causing harm or interruption in its authorized agent. C. The user may void any charges that the equipment provided to customer is required to give advanced written notice to the user, allowing the user to take appropriate ...
...fraud, the unauthorized use of own system. There are may temporarily disconnect service as long as specifically noted in substantial additional charges for the security of telecommunications system by the manufacturer or its communications facilities or procedure. Incidence of Harm If a telephone ...network, the telephone company is faulty and possibly causing harm or interruption in its authorized agent. C. The user may void any charges that the equipment provided to customer is required to give advanced written notice to the user, allowing the user to take appropriate ...
Service Manual
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... Adapter X Portable Handsfree X Bluetooth headset X Bluetooth stereo earset controller X Car kit X Leather Pouch X Stylus Pen X X Compass X - 13 - 2. Handset Restore Factory Setting O Read Software Version O Battery Charging Mode O Security Emergency Call O Handset Lock O Security Code O Delete all SIM Lock O Key guard O Real Time Clock 12/24 hour O Calendar O Automatic Leap Year Adjustment...
... Adapter X Portable Handsfree X Bluetooth headset X Bluetooth stereo earset controller X Car kit X Leather Pouch X Stylus Pen X X Compass X - 13 - 2. Handset Restore Factory Setting O Read Software Version O Battery Charging Mode O Security Emergency Call O Handset Lock O Security Code O Delete all SIM Lock O Key guard O Real Time Clock 12/24 hour O Calendar O Automatic Leap Year Adjustment...
Service Manual
Page 19
...supply voltages and currents needed in the ROM, which ensures a hardware secured boot procedure. It offers a wide charger voltage range, making halfwave/full-wave charging with a special driver for the complete mobile phone application. White/blue backlight generation is directly connected to a power saving mode. Verification of the C166... unit (PMU) for very a low external parts count. The following security features are stored in a low feature mobile phone. A charger control circuit charges NiCd, NiMH and LiIon batteries. 3. The charger control supports hardware controlled pre...
...supply voltages and currents needed in the ROM, which ensures a hardware secured boot procedure. It offers a wide charger voltage range, making halfwave/full-wave charging with a special driver for the complete mobile phone application. White/blue backlight generation is directly connected to a power saving mode. Verification of the C166... unit (PMU) for very a low external parts count. The following security features are stored in a low feature mobile phone. A charger control circuit charges NiCd, NiMH and LiIon batteries. 3. The charger control supports hardware controlled pre...
Service Manual
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... - 26 - LCD Interface VBAT CHARGE PUMP MLED W_LED_DRV R202 C202 100K 27p U200 5 IN AAT3157ITP-T1 10 C1+ 8 CP 11 EN_SET 4 GND C1- 9 7 C2+ 6 C2- TECHNICAL BRIEF 3.5 LCD Interface(3-wire ...
... - 26 - LCD Interface VBAT CHARGE PUMP MLED W_LED_DRV R202 C202 100K 27p U200 5 IN AAT3157ITP-T1 10 C1+ 8 CP 11 EN_SET 4 GND C1- 9 7 C2+ 6 C2- TECHNICAL BRIEF 3.5 LCD Interface(3-wire ...
Service Manual
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... power. The low-current mode supply current can be feed back from a 2.7V to maximize efficiency for driving higher current LEDs. Charge pump Output Current Output (mA/Ch) 5.0 4.2 3.4 2.8 1.0 0.5 0.1 0.05 - 27 - AnalogicTech's S2Cwire™ (Simple Serial Control...™) serial digital input is a low noise, constant frequency charge pump DC/DC converter that uses a trimode load switch (1X), fractional (1.5X), and doubling (2X) conversion to 5.5V input. Data 1 2 3 4 5 6...
... power. The low-current mode supply current can be feed back from a 2.7V to maximize efficiency for driving higher current LEDs. Charge pump Output Current Output (mA/Ch) 5.0 4.2 3.4 2.8 1.0 0.5 0.1 0.05 - 27 - AnalogicTech's S2Cwire™ (Simple Serial Control...™) serial digital input is a low noise, constant frequency charge pump DC/DC converter that uses a trimode load switch (1X), fractional (1.5X), and doubling (2X) conversion to 5.5V input. Data 1 2 3 4 5 6...
Service Manual
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... - and end of current from an external power source. TECHNICAL BRIEF 3.8 Battery Charging Block Interface CHARGING IC 2V8_VIO VCHARGE VBAT VCHARGE R118 NA U101 CHARGE_DETECT R119 1.8K 1 VIN VBAT 10 C125 R120 2 _FAULT VSEN_TEMP 9 1u ...lithiumion/polymer battery cells. The AAT3681A precisely regulates battery charge voltage and current for the battery charge cycle: pre-conditioning/trickle charge; constant voltage; The adapter/USB charge input constant current level can be programmed up to charge single Cell lithiumion/polymer batteries with just one external component...
... - and end of current from an external power source. TECHNICAL BRIEF 3.8 Battery Charging Block Interface CHARGING IC 2V8_VIO VCHARGE VBAT VCHARGE R118 NA U101 CHARGE_DETECT R119 1.8K 1 VIN VBAT 10 C125 R120 2 _FAULT VSEN_TEMP 9 1u ...lithiumion/polymer battery cells. The AAT3681A precisely regulates battery charge voltage and current for the battery charge cycle: pre-conditioning/trickle charge; constant voltage; The adapter/USB charge input constant current level can be programmed up to charge single Cell lithiumion/polymer batteries with just one external component...
Service Manual
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... several methods are generated on -chip voltage regulators. The external memory and SIM card supply is provided by the on -chip with discharged batteries, trickle charging and system reset control. TECHNICAL BRIEF 3.14 Power Block Interface VD1 2V8_VIO 2V85_VSIM 2V8_VMEM 1V5_VRF0 3V2_VBUF C101 2.2u VD1 2V5_VANA (1608) L102 18nH C113 1u...
... several methods are generated on -chip voltage regulators. The external memory and SIM card supply is provided by the on -chip with discharged batteries, trickle charging and system reset control. TECHNICAL BRIEF 3.14 Power Block Interface VD1 2V8_VIO 2V85_VSIM 2V8_VMEM 1V5_VRF0 3V2_VBUF C101 2.2u VD1 2V5_VANA (1608) L102 18nH C113 1u...
Service Manual
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... automatically wraps around to the upper byte of two 80mW Class AB headphone drivers, internal feedback network (fixed -1.5V/V gain), undervoltage lockout (UVLO)/shutdown control, charge pump, and comprehensive click-and-pop suppression circuitry. - 43 - TECHNICAL BRIEF 3.15.1 FM Tunner The Si4702 patented digital low-IF architecture reduces external components and...
... automatically wraps around to the upper byte of two 80mW Class AB headphone drivers, internal feedback network (fixed -1.5V/V gain), undervoltage lockout (UVLO)/shutdown control, charge pump, and comprehensive click-and-pop suppression circuitry. - 43 - TECHNICAL BRIEF 3.15.1 FM Tunner The Si4702 patented digital low-IF architecture reduces external components and...
Service Manual
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LDO VOLTAGE PART V_BUF 3.2V C101 V_MEM 2.8V C109 V_IO 2.8V C107 V_SIM 2.85V C108 VRF0 1.5V C110 V_ANA 2.5V C113 - 55 - 4. TROUBLE SHOOTING Power On Trouble CHECKING FLOW START Check Battery Voltage > 3.35V YES Push power-on key And check the level change of PWRKEY YES Check the voltage of The LDO outputs at U102 NO Charge or Change Battery NO Check the contact of power key Or dome-switch NO Replace U102 YES THE PHONE WILL POWER ON.
LDO VOLTAGE PART V_BUF 3.2V C101 V_MEM 2.8V C109 V_IO 2.8V C107 V_SIM 2.85V C108 VRF0 1.5V C110 V_ANA 2.5V C113 - 55 - 4. TROUBLE SHOOTING Power On Trouble CHECKING FLOW START Check Battery Voltage > 3.35V YES Push power-on key And check the level change of PWRKEY YES Check the voltage of The LDO outputs at U102 NO Charge or Change Battery NO Check the contact of power key Or dome-switch NO Replace U102 YES THE PHONE WILL POWER ON.
Service Manual
Page 76
... TEST POINT Check Points -Connection of TA (check TA voltage 5.2V) -Charging Current Path component voltage drop -Battery voltage -Charging IC R124 Charger IC U101 C125 VBAT VCHARGE =5.2V C126 CN301 CIRCUIT CHARGING IC 2V8_VIO VCHARGE VBAT VCHARGE R118 NA U101 CHARGE_DETECT R119 1.8K 1 VIN 10 VBAT C125 R120 2 9 _FAULT VSEN_TEMP 1u NA...
... TEST POINT Check Points -Connection of TA (check TA voltage 5.2V) -Charging Current Path component voltage drop -Battery voltage -Charging IC R124 Charger IC U101 C125 VBAT VCHARGE =5.2V C126 CN301 CIRCUIT CHARGING IC 2V8_VIO VCHARGE VBAT VCHARGE R118 NA U101 CHARGE_DETECT R119 1.8K 1 VIN 10 VBAT C125 R120 2 9 _FAULT VSEN_TEMP 1u NA...
Service Manual
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YES Battery is out of R124 High or Low? TROUBLE SHOOTING Checking Flow START I/O Connector(CN301) Is well-soldered ? YES The Voltage of C128 Is 2.8V YES Check the voltage of order Change the TA Replace the U101 Check the U102 The battery may have problems. Change the battery. - 78 - 4. NO NO LOW NO NO YES Charging is properly operating Resolder the CN300 Pin 12,13 : VCHARGE The TA is charged? YES Is The Voltage of C126 5.2V ?
YES Battery is out of R124 High or Low? TROUBLE SHOOTING Checking Flow START I/O Connector(CN301) Is well-soldered ? YES The Voltage of C128 Is 2.8V YES Check the voltage of order Change the TA Replace the U101 Check the U102 The battery may have problems. Change the battery. - 78 - 4. NO NO LOW NO NO YES Charging is properly operating Resolder the CN300 Pin 12,13 : VCHARGE The TA is charged? YES Is The Voltage of C126 5.2V ?
Service Manual
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... 8 9 LG(42)-A-5505-10:01 LG Electronics Inc. - 89 - Date Name LG Electronics Inc. DRAWING NO. 7. CIRCUIT DIAGRAM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 A A 3 32.768KHZ CRYSTAL B X100 32KIN 4 3 32KOUT 1 2 MC-146_12_5PF 32.768KHz C104 18p C105 18p C R196 R197 R198 R199 MODEL KG278, MG160b, KG275 KG270 MG160a R196 ...15 16 R115 100K TCK TRSTn TRIG_OUT TRIG_IN CHG_EN K9 TCK B5 TRST_N C5 TRIG_OUT TRIG_IN F7 NMI_N (FOR CHARGING IC) N6 PMB7880 U102 W_LED_DRV A4 CC00IO A3 RSTOUT_N RESET_N P5 SAFE_RES M7 N7 _RESET W_LED_DRV RADIO_EN (FOR FM...
... 8 9 LG(42)-A-5505-10:01 LG Electronics Inc. - 89 - Date Name LG Electronics Inc. DRAWING NO. 7. CIRCUIT DIAGRAM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 A A 3 32.768KHZ CRYSTAL B X100 32KIN 4 3 32KOUT 1 2 MC-146_12_5PF 32.768KHz C104 18p C105 18p C R196 R197 R198 R199 MODEL KG278, MG160b, KG275 KG270 MG160a R196 ...15 16 R115 100K TCK TRSTn TRIG_OUT TRIG_IN CHG_EN K9 TCK B5 TRST_N C5 TRIG_OUT TRIG_IN F7 NMI_N (FOR CHARGING IC) N6 PMB7880 U102 W_LED_DRV A4 CC00IO A3 RSTOUT_N RESET_N P5 SAFE_RES M7 N7 _RESET W_LED_DRV RADIO_EN (FOR FM...
Service Manual
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... Checked Approved Date 11/16 2006 Sign & Name HYUN-OK.LEE MODEL DRAWING NAME GB3_RADIO Sheet/ Sheets 2/4 AUDIO,LCD,KEY LG Electronics Inc. CIRCUIT DIAGRAM 1 2 3 4 5 6 7 8 9 10 A A 2V0_VRTC KEY MATRIX END VBAT CHARGE PUMP END_KEY SW200 U200 5 IN AAT3157ITP-T1 10 C1+ C200 MAKER ID Voltage 1u KEY_OUT1 R201 SW201 1 SW202 2 SW203 3 SW204... LEBB-S14H 100ohm R216 C222 1u (10V,K,X5R) LD201 LD200 KEY_BACKLIGHT R222 1K R223 10K 2SC5585 Q200 (10V,K,X5R) 2 3 4 D Iss. 5 Notice No. DRAWING NO. REV-1.1 LG Electronics Inc. - 90 - 7.
... Checked Approved Date 11/16 2006 Sign & Name HYUN-OK.LEE MODEL DRAWING NAME GB3_RADIO Sheet/ Sheets 2/4 AUDIO,LCD,KEY LG Electronics Inc. CIRCUIT DIAGRAM 1 2 3 4 5 6 7 8 9 10 A A 2V0_VRTC KEY MATRIX END VBAT CHARGE PUMP END_KEY SW200 U200 5 IN AAT3157ITP-T1 10 C1+ C200 MAKER ID Voltage 1u KEY_OUT1 R201 SW201 1 SW202 2 SW203 3 SW204... LEBB-S14H 100ohm R216 C222 1u (10V,K,X5R) LD201 LD200 KEY_BACKLIGHT R222 1K R223 10K 2SC5585 Q200 (10V,K,X5R) 2 3 4 D Iss. 5 Notice No. DRAWING NO. REV-1.1 LG Electronics Inc. - 90 - 7.
Service Manual
Page 121
...-ion charger IC, 1A, 10Pin, 3x3, DFN 6 U102 IC EUSY0317401 BGA ,189 PIN,R/TP ,E-Gold voice 6 U200 IC EUSY0238702 TSOPJW-12 ,12 PIN,R/TP ,3PORT Charge Pump(AAT2154 Low cost version) 6 U301 IC EUSY0328001 BGA ,56 PIN,R/TP ,32Mb/4Mb , 200 nm, MirroBit 6 U302 IC EUSY0320801 QFN ,20 PIN,R/TP ,FM...
...-ion charger IC, 1A, 10Pin, 3x3, DFN 6 U102 IC EUSY0317401 BGA ,189 PIN,R/TP ,E-Gold voice 6 U200 IC EUSY0238702 TSOPJW-12 ,12 PIN,R/TP ,3PORT Charge Pump(AAT2154 Low cost version) 6 U301 IC EUSY0328001 BGA ,56 PIN,R/TP ,32Mb/4Mb , 200 nm, MirroBit 6 U302 IC EUSY0320801 QFN ,20 PIN,R/TP ,FM...