3. TECHNICAL BRIEF
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3.12 Microphone
The microphone is soldered to the main PCB. The audio signal is passed to VINNORP (#K8) and
VINNORN (#K7) pins of the AD6522. The voltage supply 2V45_VAN is output from the ADP3408,
and is a bias voltage for both the VINNOR (through R41) and VINAUX (through R54) lines. The
VINNOR or VINAUX signal is then A/D converted by the Voiceband ADC part of the AD6521. The
digitized speech is then passed to the DSP section of the AD6522 for processing (coding,
interleaving etc.).
Figure 3-14. Microphone.
3.13 Earpiece
The earpiece is driven directly from the AD6521 VOUTNORP (#J10) and VOUTNORN (#K10)
pins and the gain is controlled by the PGA in the AD6521. The earpiece is located in the handset
folder front panel, and the signals are routed to it via FPCB connector between Main Board and
FPCB board.
Figure 3-15. Earpiece.
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 ...