Read Panasonic KX-TGA915EXS Service Manual online
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KX-TGA915EXS
4.2.
Circuit Operation
4.2.1.
Outline
USB adaptor consists of the following ICs as shown in Block Diagram (P.7).
• DECT BBIC (Base Band IC): IC1
- All data signals (forming/analyzing ACK or CMD signal)
- All interfaces (ex: Key, Detector Circuit, Charge, DC/DC Converter, Flash ROM, LCD)
- All interfaces (ex: Key, Detector Circuit, Charge, DC/DC Converter, Flash ROM, LCD)
• FLASH MEMORY: IC2
- Source program data and temporary user data are stored
• EEPROM: IC5
- All setting data is stored.
ex: ID code, user setting (Device name, Name & ID of connected device)
• RF Module: IC6
- PLL Oscillator
- Detector
- Compress/Expander
- Amplifier for transmission and reception
- Detector
- Compress/Expander
- Amplifier for transmission and reception
• Regulator IC: IC4
- +3.2 V regulator
• Regulator IC: IC7, IC9
- +2.5 V regulator
• USB Controller: IC3
• AND IC: IC8
• AND IC: IC8
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