Service Manual
Page 2
... 2. 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. Table Of Contents 1. TECHNICAL BRIEF 14 3.1 Digital Main Processor(PMB7880).........14 3.2 Power Amplifier Module (SKY77318) ....22...Clock (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....
... 2. 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. Table Of Contents 1. TECHNICAL BRIEF 14 3.1 Digital Main Processor(PMB7880).........14 3.2 Power Amplifier Module (SKY77318) ....22...Clock (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....
Service Manual
Page 15
... Features ] Baseband • High performance fixed-point TEAKlite DSP • C166S high performance microcontroller • There are supported - Keypad Interface (6x4 or 5x5 keys) - JTAG Interface - High Speed SSC Interface for connection of interstage and IF filter • ...8226; Two integrated LNAs • No need of external peripherals - I2S interface for DAI connections (for external RAM/FLASH connection - Keypad and display backlight supported. ] Receiver • Constant gain, direct conversion receiver with a highly linear tuning characteristic. - 16 - 3. EBU for Tape...
... Features ] Baseband • High performance fixed-point TEAKlite DSP • C166S high performance microcontroller • There are supported - Keypad Interface (6x4 or 5x5 keys) - JTAG Interface - High Speed SSC Interface for connection of interstage and IF filter • ...8226; Two integrated LNAs • No need of external peripherals - I2S interface for DAI connections (for external RAM/FLASH connection - Keypad and display backlight supported. ] Receiver • Constant gain, direct conversion receiver with a highly linear tuning characteristic. - 16 - 3. EBU for Tape...
Service Manual
Page 28
... should be determined at the very beginning of the system start because changes are not allowed later. - 29 - 3. TECHNICAL BRIEF 3.7 KEYPAD Interface KEY MATRIX END_KEY END SW200 2V0_VRTC KEY_OUT1 R201 680 C205 NA KEY_OUT2 R203 680 C206 NA KEY_OUT3 R204 680 C207 NA KEY_OUT4 R209 680...RIGHT SW215 SEND SW218 # SW219 DOWN C218 NA C219 NA C220 NA Figure 3-7 KEY MAXTRIX Interface The keypad interface is a 4x6 scan matrix (4 input and 6 output pins). • To set the keypad to the X-Bus, together with the XBIU and the Shared Memory Register, using a single Bus Interface...
... should be determined at the very beginning of the system start because changes are not allowed later. - 29 - 3. TECHNICAL BRIEF 3.7 KEYPAD Interface KEY MATRIX END_KEY END SW200 2V0_VRTC KEY_OUT1 R201 680 C205 NA KEY_OUT2 R203 680 C206 NA KEY_OUT3 R204 680 C207 NA KEY_OUT4 R209 680...RIGHT SW215 SEND SW218 # SW219 DOWN C218 NA C219 NA C220 NA Figure 3-7 KEY MAXTRIX Interface The keypad interface is a 4x6 scan matrix (4 input and 6 output pins). • To set the keypad to the X-Bus, together with the XBIU and the Shared Memory Register, using a single Bus Interface...