4. TROUBLE SHOOTING
- 39 -
• Replacement of a PAM
A PAM (Power Amplifier Module ; U303) may need to be replaced with new one due to following
problems.
- Can not make a call after serious damage / impact on the phone or dropping the phone.
- Can not make a call again after sending or receiving call.
- Message “Reading Power Time Out”, is displayed on the panel of equipment such as HP8960
during RF calibration for several times, then the RF calibration can not process at all.
• How to replace a PAM.
1. Using a screwdriver to disassemble the back housing carefully.
2. Use a soldering station to detach the soldered parts of main PCB and FPCB.
3. Then remove the main PCB from the housing.
4. Set a hitting gun at 500
. Then switch on the power and wait for 5 minutes.
5. Place the hitting gun 1 cm away from the top end of a PAM for 5 minutes. After hitting it up, use
tweezers (pincette) to hold both the sides of a PAM and lift it up carefully.
6. Use a solder station to adhere a little of lead on PCB pad where a PAM is replaced on.
7. Place a new PAM carefully on PCB pad.
8. Hit up a PAM and PCB pad to attach them together by using the hitting gun.
9. Assemble them to the housing after about 10 minutes.
10. After the replacement, please process the RF calibration.
Содержание LG-510W
Страница 1: ...GSM Phone SERVICE MANUAL MODEL LG 510W SERVICE MANUAL MODEL 510W ...
Страница 27: ...3 TECHNICAL BRIEF 26 3 8 Power Management ADP3408 Figure 3 12 ADP3408 Inner Block Diagram ...
Страница 30: ...3 TECHNICAL BRIEF 29 Figure 3 13 Keypad Switches and Scanning ...
Страница 34: ...4 TROUBLE SHOOTING 33 4 TROUBLE SHOOTING Fig 4 1 shows a measurement set up Figure 4 1 Measurement Set up ...
Страница 35: ...4 1 RX Trouble 4 TROUBLE SHOOTING 34 ...
Страница 36: ...4 TROUBLE SHOOTING 35 RX Level Check EGSM ...
Страница 37: ...4 TROUBLE SHOOTING 36 RX Level Check DCS ...
Страница 38: ...4 2 TX Trouble 4 TROUBLE SHOOTING 37 ...
Страница 39: ...4 TROUBLE SHOOTING 38 TX Level Check ...
Страница 41: ...4 TROUBLE SHOOTING 40 4 3 Power on Trouble ...
Страница 42: ...4 TROUBLE SHOOTING 41 ...
Страница 43: ...4 TROUBLE SHOOTING 42 4 4 Charge Trouble ...
Страница 44: ...4 TROUBLE SHOOTING 43 4 5 LCD Trouble ...
Страница 45: ...4 TROUBLE SHOOTING 44 4 6 Receiver Trouble ...
Страница 46: ...4 TROUBLE SHOOTING 45 4 7 Buzzer Trouble ...
Страница 47: ...4 TROUBLE SHOOTING 46 4 8 MIC Trouble ...
Страница 48: ...4 TROUBLE SHOOTING 47 4 9 Vibrator Trouble ...
Страница 49: ...4 TROUBLE SHOOTING 48 4 10 Indicator LED Trouble ...
Страница 50: ...4 TROUBLE SHOOTING 49 ...
Страница 51: ...4 TROUBLE SHOOTING 50 4 11 Backlight LED Trouble ...
Страница 52: ...4 12 Folder on off Trouble 4 TROUBLE SHOOTING 51 ...
Страница 53: ...4 13 SIM Detect Trouble 4 TROUBLE SHOOTING 52 ...
Страница 54: ...4 14 Earphone Trouble 4 TROUBLE SHOOTING 53 ...
Страница 55: ...4 TROUBLE SHOOTING 54 ...
Страница 56: ...4 TROUBLE SHOOTING 55 4 15 HFK Trouble ...
Страница 57: ...4 TROUBLE SHOOTING 56 ...
Страница 61: ... RF Components Keypad Side Figure 5 2 RF Components Keypad Side 5 TEST POINT DATA 60 U304 APCIC ...
Страница 63: ...5 TEST POINT DATA 62 Figure 5 4 Receiver RF Levels GSM CH 62 60dBm DCS CH 699 60dBm ...
Страница 65: ... Test Point of TX Levels 2 Figure 5 6 Test Point of TX Levels 2 5 TEST POINT DATA 64 10 19 ...
Страница 66: ...5 TEST POINT DATA 65 GSM Pwr LvI 5 CH 62 32dBm DCS Pwr LvI 0 CH 699 29dBm Figure 5 7 Transmitter RF Levels ...
Страница 68: ...5 TEST POINT DATA 67 Control Signal Test Points 2 Figure 5 9 Control Signal Test Points 2 TXEN TXRAMP ...
Страница 69: ...Figure 5 10 Regulator Output RF2V8 Figure 5 11 VCTCXO Power Supply 2V7_VCTCXO 5 TEST POINT DATA 68 ...
Страница 70: ...5 TEST POINT DATA 69 Figure 5 12 13MHz Clock Figure 5 13 Control Signal of FEM in RX mode GSM DCS both ...
Страница 72: ...5 TEST POINT DATA 71 Figure 5 16 CLK DATA SEN Figure 5 17 CLK DATA AGCEN ...
Страница 73: ...Figure 5 18 RXON1 RXON2 Figure 5 19 TXEN TARAMP TXPA 5 TEST POINT DATA 72 ...
Страница 74: ...5 TEST POINT DATA 73 Figure 5 20 TX IQ Signal Figure 5 21 RX IQ Signal ...
Страница 87: ...9 2 FPCB Figure 9 2 FPCB Blockdiagram 9 BLOCK DIAGRAM 86 ...
Страница 88: ...9 BLOCK DIAGRAM 87 9 3 RF Figure 9 3 RF Blockdiagram ...
Страница 89: ...9 BLOCK DIAGRAM 88 ...
Страница 90: ... 89 10 CIRCUIT DIAGRAM 10 CIRCUIT DIAGRAM 10 1 BB Circuit ...
Страница 91: ... 90 10 CIRCUIT DIAGRAM 10 2 RF Circuit ...
Страница 92: ... 91 11 PCB LAYOUT 11 PCB LAYOUT ...
Страница 93: ... 92 11 PCB LAYOUT ...
Страница 95: ...12 DOWNLOAD AND CALIBRATION 94 Figure 12 2 Download Setup Type2 Using JIG ...
Страница 110: ...P N MMBD0012501 DECEMBER 2001 SERVICE MANUAL MODEL 510W ...