Notes For All Schematics And Circuit Boards - Motorola GM328 Service Manual

Notes For All Schematics and Circuit Boards

5.0 Notes For All Schematics and Circuit Boards
* Component is frequency sensitive. Refer to the Electrical Parts List for value and usage.
1. Unless otherwise stated, resistances are in Ohms (K = 1000), and capacitances are in picofarads
(pF) or microfarads (µF).
2. DC voltages are measured from point indicated to chassis ground using a Motorola DC
multimeter or equivalent. Transmitter measurements should be made with a 1.2 µH choke in
series with the voltage probe to prevent circuit loading.
3. Interconnect Tie Point Legend:
16_8MHz
3V3
5V
5V
5V RF
5V SOURCE
5VD
9V3
9V3FLT
A+
ADDR
AN
ANALOG INPUT 2
ANALOG INPUT 3
BATTERY VOLTAGE
BL A GREEN
BL A RED
BL GREEN
BL K GREEN
BL K RED
BL KP Green
16.8MHz Reference Frequency
Regulated 3.3V Supply Voltage for Voice Storage
Regulated 5V Supply Voltage for RF Circuitry
Regulated 5V Supply Voltage (Control Head)
Regulated 5V Supply Voltage for RF Circuitry
5V Signal to Switch On Control Head
Regulated 5V Supply Voltage for Digital Circuitry
Regulated 9.3V Supply Voltage
Filtered 9.3V Supply Voltage
13.2V Supply Voltage
µP Address Lines
Analog Lines to Analog to Digital Converter
External Keypad Matrix Column Signal
External Keypad Matrix Row Signal
Battery Voltage Sense Line
Back Light Anode Green
Back Light Anode Red
Green Back Light Control
Back Light Cathode Green
Back Light Cathode Red
Green Keypad Back Light Control
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