Service Manual
Page 2
...& REPLACEMENT PART LIST ..... 113 12.1 Exploded View 113 12.2 Replacement Parts 115 12.3 Accessory 124 -3- TROUBLE SHOOTING 44 4.1 RF Trouble 44 4.2 TX Trouble 50 4.3 Power On Trouble 54 4.4 SIM Card Trouble 56 4.5 Vibrator Trouble 58 4.6 Keypad Trouble 60 4.7 RTC Trouble 62 4.8. BLOCK DIAGRAM ...88 7. STAND ALONE TEST 109 11.1 Test Program Setting 109 11.2 Tx Test 111 11.3 RX Test 112 12. ENGINEERING MODE 95 9.1 About Engineering Mode 95 9.2 Access Codes 95 9.3 Key Operation 95 9.4 Engineering Mode Menu Tree...
...& REPLACEMENT PART LIST ..... 113 12.1 Exploded View 113 12.2 Replacement Parts 115 12.3 Accessory 124 -3- TROUBLE SHOOTING 44 4.1 RF Trouble 44 4.2 TX Trouble 50 4.3 Power On Trouble 54 4.4 SIM Card Trouble 56 4.5 Vibrator Trouble 58 4.6 Keypad Trouble 60 4.7 RTC Trouble 62 4.8. BLOCK DIAGRAM ...88 7. STAND ALONE TEST 109 11.1 Test Program Setting 109 11.2 Tx Test 111 11.3 RX Test 112 12. ENGINEERING MODE 95 9.1 About Engineering Mode 95 9.2 Access Codes 95 9.3 Key Operation 95 9.4 Engineering Mode Menu Tree...
Service Manual
Page 40
... power supply for most of the SIM card supply 2.6/2.8/3.0/3.2 300 Used for the loudspeaker and earpiece driver 2.5 100 Used for the RF RX part 1.5 120 Used for the RF TX/TX part Figure 3-14-2 EGold Voice PMU LDO output voltage selection • LD1, LIO, LSIM, LBUF output voltage programmable by software. • LMEM...
... power supply for most of the SIM card supply 2.6/2.8/3.0/3.2 300 Used for the loudspeaker and earpiece driver 2.5 100 Used for the RF RX part 1.5 120 Used for the RF TX/TX part Figure 3-14-2 EGold Voice PMU LDO output voltage selection • LD1, LIO, LSIM, LBUF output voltage programmable by software. • LMEM...
Service Manual
Page 51
4. TROUBLE SHOOTING TX Trouble TEST POINT SW400 U400 FL400 FL401 CIRCUIT TP400 TP401 TP402 TP403 TP404 TP405 R400 NA R401 0 C400 1p L401 22nH SW400 RF500 R403 0 L400 2.2nH ANT G2 G1 RF X101 U102 VC1 VC2 C417 C418 27p 27p C410 22p FL400 LMSP2PAA-575TEMP 9 1 IN GSM1800_1900TX GSM1800_1900RX 6 3 7 VC_GSM850_900TX VC_GSM1800_1900TX 5 8 GND1 GSM850_900TX 2 4 10 GND2 GND3 GSM850_900RX Mode VC1 VC2 GSM900 TX H(2.7V) L DCS1800 TX L H(2.7V) GSM800 RX L L DCS1800 RX L L - 52 -
4. TROUBLE SHOOTING TX Trouble TEST POINT SW400 U400 FL400 FL401 CIRCUIT TP400 TP401 TP402 TP403 TP404 TP405 R400 NA R401 0 C400 1p L401 22nH SW400 RF500 R403 0 L400 2.2nH ANT G2 G1 RF X101 U102 VC1 VC2 C417 C418 27p 27p C410 22p FL400 LMSP2PAA-575TEMP 9 1 IN GSM1800_1900TX GSM1800_1900RX 6 3 7 VC_GSM850_900TX VC_GSM1800_1900TX 5 8 GND1 GSM850_900TX 2 4 10 GND2 GND3 GSM850_900RX Mode VC1 VC2 GSM900 TX H(2.7V) L DCS1800 TX L H(2.7V) GSM800 RX L L DCS1800 RX L L - 52 -
Service Manual
Page 88
...LG Electronics Inc. VER-1.1 1 2 3 4 5 6 7 8 9 LG(42)-A-5505-10:01 LG Electronics Inc. - 89 - Notice No. 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 ...FOR CHARGING IC) ADD02 A2 A19 ADD19 1 E4 F3 GND GND 2 ADD03 D4 A3 A18 L3 ADD18 RX RX RXD ADD04 A4 A17 ADD17 3 G4 K4 TX TX UFLS 4 NC1 TXD ADD05 ADD06 D2 A5 A6 A16 A15 J4 ADD16 ADD15 5 H4 H3 ON_SW ON_SW ...
...LG Electronics Inc. VER-1.1 1 2 3 4 5 6 7 8 9 LG(42)-A-5505-10:01 LG Electronics Inc. - 89 - Notice No. 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 ...FOR CHARGING IC) ADD02 A2 A19 ADD19 1 E4 F3 GND GND 2 ADD03 D4 A3 A18 L3 ADD18 RX RX RXD ADD04 A4 A17 ADD17 3 G4 K4 TX TX UFLS 4 NC1 TXD ADD05 ADD06 D2 A5 A6 A16 A15 J4 ADD16 ADD15 5 H4 H3 ON_SW ON_SW ...
Service Manual
Page 98
...Radio Frequency Channel Number (Frequency Number) of Serving Cell while Dedicated mode RxLf : Full RX level of Serving Cell RxLs : Sub RX level of Serving Cell RxQf : Full RX qual of Serving Cell RxQs : Sub RX qual of Serving Cell DSC : Downlink Signal Counter RLL : Radio Link Loss Counter Chtyp... Cell PTime : PENALTY_TIME value of Serving Cell RF# : Number of frequencies in MA(Mobile Allocation) T3212 : Periodic Location Update Timer TxPwrLev : Current Tx power of MS ACC : Access Control Class Band : Current Band Information TA : Current Timing Advance Cipher : Cipher mode of Serving Cell CBQ :...
...Radio Frequency Channel Number (Frequency Number) of Serving Cell while Dedicated mode RxLf : Full RX level of Serving Cell RxLs : Sub RX level of Serving Cell RxQf : Full RX qual of Serving Cell RxQs : Sub RX qual of Serving Cell DSC : Downlink Signal Counter RLL : Radio Link Loss Counter Chtyp... Cell PTime : PENALTY_TIME value of Serving Cell RF# : Number of frequencies in MA(Mobile Allocation) T3212 : Periodic Location Update Timer TxPwrLev : Current Tx power of MS ACC : Access Control Class Band : Current Band Information TA : Current Timing Advance Cipher : Cipher mode of Serving Cell CBQ :...