General; Controller; Transceiver; Schematic Notes - Motorola GP350 Service Manual

Battery Filter Board
MAEPF-25508-O
MAEPF-25509-O
63A81084C55-O
Parts List:
0180702Y89 Battery Filter Board
REFERENCE MOTOROLA
DESCRIPTION
SYMBOL PART NO.
CAPACITOR, Fixed:
39pF ±5%; 50V
C2, 3, 4 2113740A43
COIL, RF:
L1, 2 2484657R01 Ferrite Bead
FUSE:
F1 6505663R044 4Amp.
Flex Circuit
Speaker Common
External Microphone
Ground
External Speaker
External Select
LS1
J5
INT SPKR 1
SPKR COM 2
MK1
GND 3
C1
INT MIC 4
EXT SEL 5
EXT SPKR 6
EXT MIC 7
RADIO SIDE
EXT SEL
CONNECTOR
GND
SPKR COM
MAEPF-25510-O
Parts List:
Flex Circuit
INT
SPKR
REFERENCE MOTOROLA
DESCRIPTION
SYMBOL PART NO.
CAPACITOR, Fixed:
33pF ±5%; 50V
C1 2113740A41
INT
MIC
LS1 5005589U05 SPEAKER
MICROPHONE:
MK1 5013920A04 Electret
EXT SPKR
EXT MI
Component Location Diagrams,
Schematic Diagrams, and Parts Lists for
Battery Filter Board and Flex Circuit

General

Controller components and transceiver components are all part of a single circuit board. Two circuit boards
(component location diagrams), VHF and UHF, show transceiver and controller components.

Controller

Any differences in the controller between the VHF and UHF RF bands will be on the controller schematic
and parts list.

Transceiver

Each bandsplit (VHF or UHF) will include 12.5 and 25KHz channel spacing. Any differences between 12.5
and 25KHz channel spacing will be denoted on the particular VHF or UHF schematic and corresponding
parts list.

Schematic Notes

1. Unless otherwise indicated, resistor values are in ohms, capacitor values are in picofarads, and inductor
values are in microfarads.
2. Non-polarized capacitors are chip-type unless otherwise indicated.
3. Polarized capacitors are titanium chip-type unless otherwise indicated.
4. "NU" means that a component is not used.
5. DC voltages are measured with a high impedance (10 megohm) DC voltmeter.
6. AC voltages are measured with a high impedance AC RMS voltmeter.
7. All voltages measured are in the receive mode unless indicated otherwise. Indications are as follows:
(R) Receive Mode
(T) Transmit Mode
8. Measured in the receive mode with an on-channel unmodulated signal at a level of -20dBm.
9. Measured in the receive mode with an on-channel unmodulated signal at a level of -20dBm, modulated
with 1kHz at 3kHz deviation (for 20/25kHz models) or 1.5kHz deviation (for 12.5kHz models), mea-
sured with an AC RMS voltmeter.
10. Same as note 8, except with volume control adjusted for 500 milliwatts (2.82 volts RMS across a 16-
ohm load connected to the external speaker jack.
11. Measured in the transmit mode with a 1kHz, 11mV RMS signal applied to the external microphone
input.
Battery Filter Board and Flex Circuit
Circuit Board Details, Schematic Diagrams, and Parts Lists
August 13, 1996 6880904Z07-O
Section 616
Section 7
6-1