Product Description; Concept Of 120X; V120X+ Ic Description; Non Qualcomm Ic's - Motorola V120e Service Manual

Personal Communications Sector
V 120e W/AGPS
V 120e is same as V120X in
functionality except that it also has the
Assisted Global Positioning System.
AGPS helps in 911 emergency calls to track
the user to its exact location.
Concept:
The phone receives the signals from GPS sat-
ellites(from 3 of 24 in the orbit), signals as low
as –149dB(typical is –130dB) and transmit the
information to the cell site in CDMA mode.
GPS service is available only with CDMA ser-
vice. No GPS operation in AMPS system.
GPS works on 1575.42Mhz frequency.
V120X+ is identical in electrical and
Mechanical hardware to V120X except
as follows to support the AGPS:
— 30 new parts which contains discrete
components – resistors , capacitors, and
filters which are mostly at the front end of
the receiver.
— Pogo pin on the PC Board which is
connected to the front end of the receiver
makes the mechanical contact with the
GLSR-GPS antenna which is placed inside
the back housing.
— RF shield covers the front end receiver of
the GPS circuit.
— FM and GPS share the lines at the back end
of the receiver.
— The GPS IF frequency is 183.6Mhz
— The Bandwidth of the GPS IF filter is
40Mhz

Product Description

V120e IC description:
1. 1.Qualcomm IC's:
— MSM5100
— PM1000
— RFR3300
— IFR3000
— RFT3100
— PA2001- 4C/5C

2. Non Qualcomm IC's:

— Memory IC's :Flash part 32M bit intel
sawtooth, Eeprom 8M bit intel Jaguar,
SRAM: 8M bit
— Semtech SC801 charger controller
— Harness ASIC
— Phillips ISP1105 USB transceiver
— Phase lock loop
— Reference Oscillator 19.2Mhz

Testing and Troubleshooting GPS:

1. Do the DC analysis of the Front end of the GPS
receiver.
2. The GPS Circuit is turned on momentarily when
you dial 911.
3. Do the visual check of the Antenna, Pogo pin
and discrete parts at the Front end of the
receiver.
For all other Testing and Troubleshooting refer to
V120X documentation.
5
120e
© 2001 Motorola, Inc.