Handset HSU–1 Technical Documentation [This page intentionally left blank] Page – 14 Original 50/96
Handset HSU–1 Technical Documentation 18 19 20 21 H1 Original 50/96 5140379 5140578 9510193 6291917 0200221 Cond. microphone 62 ±3 dB Receiver capsule 103 ±2 dB Earpiece clip PT screw Handset module DG–1 2.
Handset HSU–1 Technical Documentation Exploded view Assembly parts ITEM 1 2 3 4 5 6 8 9 10 11 12 13 14 15 16 16 16 16 17 Q’TY 2 6 Page – 12 CODE DESCRIPTION VALUE, TYPE 9450302 9459393 9450132 9450133 9450304 9450305 9460098 9780086 6490220 7313054 9560015 9560001 9480171 6154430 9380154 9380154 9380154 9380154 9450075 Front cover Bottom cover Mic spacer Earphone spacer Cradle cover Cradle bottom Latch Coil cord Magnet Magnet pad Spring Spindle D shape sealing PT screw Label blank Label HSU–1 Lab
Technical Documentation C015 C016 C017 C018 C019 C020 C021 C022 C023 C024 C025 C026 C027 C028 C029 C030 C031 C032 C033 C034 C035 C036 C037 L001 L002 V001 V002 V003 V004 N001 N002 N003 S001 X001 X002 2310544 2310336 2604431 2604209 2604431 2604209 2307816 2604431 2310336 2310512 2310752 2310336 2310784 2310336 2310336 2310512 2310336 2310512 2310512 2310512 2310512 2310512 2310512 3608502 3608502 4200917 4110140 4110140 4110140 4301062 4306494 4309488 5304759 5416638 5416640 9854017 9854017 Original 50/96
Handset HSU–1 Technical Documentation Parts List of DG1 (Version 1.
Technical Documentation Handset HSU–1 Layout Diagrams Original 50/96 Page – 9
Handset HSU–1 Technical Documentation Circuit Diagram version 6.
Technical Documentation Handset HSU–1 Voltage Regulator Supply voltage to DG–1 module is fed via connector X1 pin 1. Voltage is regulated with regulator N1 ( LP2951 ACM ). Capacitors C4 and C1 are used to improve filtering. Bias voltage for Mic and Ear signals and amplifiers is made byamplifier N2C (TL074ID). Regulated voltage 5 volts is devided by resistors R1 and R2 and the amplified by N2C. Capacitor C18 filters regulated voltage.
Handset HSU–1 Technical Documentation – HOOK switch ( REED relay ) – Voltage regulator Earphone and microphone paths are controlled by Hook switch, which is opened automatically, when the handset is lifted from the cradle. In the cradle there is a magnet and in the handset there is a reed relay. Reed relay controls audio switches. The earphone amplifier is differential type and output is symmetrical. Volume is user controllable.
Technical Documentation Handset HSU–1 External Signals and Connections The HSU–1 Audio Handset has an 8 pin modular connector at the end of the coil cord to the junction box. There are only five lines in use in the coil cord. External Connections Functional Description Main function of The HSU–1 Audio Handset is to form an electroacoustic interface between the user and the phone environment. The HSU–1 Audio Handset consists of handset with coil cord and of cradle.
Handset HSU–1 Technical Documentation Technical Specifications Modes of Operation DG–1 module has only one mode of operation. Audio paths will become active when the handset is lifted from the cradle. Otherwise muting is on. Maximum Ratings –supply voltage: 16.
Technical Documentation Handset HSU–1 Handset HSU–1 Introduction Main function of the HSU–1 Audio Handset is to form an electroacoustic interface between the user and the phone environment. Technical Summary The HSU–1 Audio Handset consists of handset with coil cord and of cradle. In the handset there is earphone and microphone with corresponding amplifiers. There is also a simply interface for controlling these functions. Electronics consist of DG–1 handset module.
Handset HSU–1 Technical Documentation CONTENTS Handset HSU–1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Technical Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Use of Handset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
After Sales Technical Documentation Handset HSU–1 Original 50/96 NMP Part No.
