Dc Distribution And Regulation Part; Transceiver Pin Description - Pantech GB310 Service Manual

GB310 Service Manual

4.2.1 DC Distribution and Regulation Part

The battery voltage, in return, is applied to the logic part and RF part via LDO(Low Drop-Out)
regulator. As several LDO regulators are used, power can be supplied for each necessary part
efficiently. Audio/Logic parts use +2.8V. Si4205
also use +2.8V DC voltage.
(U303)
4.2.2 Transciever pin description
Fig.4-2. Top view of RF Transceiver PCB Layout
Fig.4-3. Top View of Si4205-BM
1
PANTECH
RF Transceiver (U304) and RF3133 Power Amplifier