Kenwood VGS-1 - User Manual

© 2003-11 PRINTED IN JAPAN
B51-8669-00
(
N
)
1011
VOICE GUIDE & STORAGE UNIT
VGS-1
SERVICE MANUAL
CIRCUIT DESCRIPTION
Recording/Playback Operation .................................................................... 2
I/O Ports ......................................................................................................... 2
Beat Shift Circuit ........................................................................................... 3
Amateur Transceiver Identification ............................................................. 3
SEMICONDUCTOR DATA
MCU : HD6433024D01TE (IC2) ...................................................................... 4
Reset IC : S-80930CNNBG80 (IC1) ................................................................ 5
Analog Switch : TC7W66FK (IC53, IC54)...................................................... 5
Bus Switch with Level Shifting : TC7MBD3244AFK (IC57) ........................ 5
COMPONENTS DESCRIPTION ......................................................................... 6
PARTS LIST ........................................................................................................ 6
PC BOARD
ACCESSORY UNIT (X42-3250-60) ................................................................ 8
SCHEMATIC DIAGRAM..................................................................................... 9
TERMINAL FUNCTION .................................................................BACK COVER
CONTENTS

Summary

CIRCUIT DESCRIPTION

Recording;Playback Operation

Details audio signal input, amplification, filtering, and digital conversion for recording and playback.

I;O Ports

Explains how VGS-1 adapts to 3V/5V systems using CMOS bus switch (IC57) for external connections.

Beat Shift Circuit

Circuit preventing spurious reception by shifting clock oscillator frequency via transistor switch (Q1).

Amateur Transceiver Identification

Describes factory settings for amateur or land mobile radio use and how to identify the unit's configuration.

SEMICONDUCTOR DATA

MCU: HD6433024 D01 TE (IC2)

Detailed pinout, function, and I/O specifications for the Micro Controller Unit (IC2).

Reset IC: S-80930 CNNBG80 (IC1)

Block diagram and functional overview of the reset integrated circuit (IC1).

Analog Switch: TC7 W66 FK (IC53, IC54)

Block diagram and truth table detailing the operation of the analog switch ICs.

Bus Switch with Level Shifting: TC7 MBD3244 AFK (IC57)

System figure and functionality of the level shifting bus switch IC.

COMPONENTS DESCRIPTION; PARTS LIST

Accessory Unit (X42-3250-60) Components

Lists major components and their functions for the accessory unit.

VGS-1 Parts List

Detailed list of parts and their part numbers for the VGS-1 unit.

PC BOARD

ACCESSORY UNIT (X42-3250-60) Component side view

Shows component placement on the accessory unit's component side.

ACCESSORY UNIT (X42-3250-60) Foil side view

Shows component placement on the accessory unit's foil side.

TERMINAL FUNCTION

Accessory Unit CN1

Lists pin numbers, names, I/O, functions, and remarks for CN1.

Kenwood VGS-1 Specifications