TDMA T2290/T2297:
GCAP2 (U1500)
B24
Description
The GCAP2(U1500) provides the regulators and start-up functions for the entire radio. The GCAP2 contains the following hardware
blocks:
•
On/Off control signal s to properly activate the radio.
•
Bandgap reference voltage
•
Audio amplifica tion for the speaker
•
Audio amplifi cation for the alert
•
Audio amplifica tion for the EXT speaker
•
Audio amplific ation of the microphone
•
Audio CODEC
•
8 channel, 8 bit A/D
•
Linear regulators
- RX_2.75V for RX circuits
- 2.75V for logic circuits
- TX_2.75V for TX circuits
- 5V for negative regulator
- REF_2.75V for negative regulator reference
BLOCK DIAGRAM NOT NECESSARY
REFER TO PAGE B25
Summary of Contents for T2290
Page 1: ...DIGITAL WIRELESS TELEPHONE Service Manual Level 3 Release 1 TDMA T2290 T2297 ...
Page 26: ... 2000 Motorola Inc TDMA T2290 T2297 Cellular Overview 16 ...
Page 40: ...Motorola Confidential Proprietary TDMA T2290 T2297 TDMA Test Mode NAM Programming 30 ...
Page 68: ...Disassembly TDMA T2290 T2297 Keypad Removal Motorola Confidential Proprietary 58 ...