MOTOROLA CONFIDENTIAL - PROPRIETARY
6881036B20
November 20, 2000
5
Level 3 Service Manual
General Operation
General Operation
The Product Family 38C Personal Communicator consists of a transceiver and a
microcomputer-controlled decoder, referred to as the controller (see Figure 1).
Messages and calls are received by way of an RF carrier that is frequency modulated
by a coded binary sequence. The circuits in the transceiver board section, through
a triple-conversion process, convert the RF signal to a low frequency signal that is
passed on to the controller. The controller processes the coded data using digital
techniques, and controls messages memory, Liquid Crystal Display (LCD), and alert
tones.
The controller processes coded messages, and forwards the messages to the trans-
mitter. The transmitter section generates a modulated RF carrier signal, amplifies
the signal, then radiates the signal through the antenna.
The following describes the general theory of operation for the Product Family 38C
Personal Communicator. See Figure 1 for a simplified, high-level functional block
diagram. Circuit descriptions are provided. Detailed functional block diagrams and
schematics for the transceiver board and controller are provided in the Supplements
listed in Related Publications.
000700-A
Figure 1. Simplified Functional Block Diagram
Antenna
Board
Keyboard
Transceiver
RX/TX
Switch
Controller
Whitecap
MAGIC
G CAP
Vibrator
Motor
Alert
Transducer
Display
Backlight
3.6V Li Ion
Battery
Headset
6881036B20
3
38C
Summary of Contents for 38C V100
Page 1: ...Level 3 Service Manual Model V100 GSM Technology Product Family 38C Personal Communicator ...
Page 2: ......
Page 73: ...V100 BOARD LAYOUT PAGE 1 2 ...
Page 74: ...V100 BOARD LAYOUT PAGE 2 2 ...
Page 77: ...V100 CONNECTOR SCHEMATICS ...
Page 78: ...V100 DISPLAY SCHEMATICS ...
Page 79: ...V100 FM SCHEMATICS ...
Page 81: ......
Page 83: ......