Nokia HSU-1 - Cell Phone Car Handset User Manual Download

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After Sales Technical Documentation

Original 50/96

NMP Part No. 0275276

Handset HSU–1

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Summary of Contents for HSU-1 - Cell Phone Car Handset

Page 1: ...After Sales Technical Documentation Original 50 96 NMP Part No 0275276 Handset HSU 1 ...

Page 2: ...DC Characteristics 4 AC Characteristics 4 Microphone Side 4 Earphone Side 4 Sidetone 4 External Signals and Connections 5 External Connections 5 Functional Description 5 Circuit Description 5 Earphone Amplifier 6 Microphone Amplifier 6 HOOK Operation 6 Voltage Regulator 7 Block Diagram 7 Circuit Diagram version 6 0 8 Layout Diagrams 9 Parts List of DG1 Version 1 1 Code 0200221 10 Exploded view 12 ...

Page 3: ...iers There is also a simply interface for controlling these functions Electronics consist of DG 1 handset module Mechanical di mensions are small and mechanics consists of A cover B cover and coil cord with the cradle The HSU 1 Audio Handset has a volume potentiom eter Use of Handset The HSU 1 Audio Handset is designed to be a dummy handset with no display and no keyboard Its use is to form an ele...

Page 4: ...ter Minimum Typical Maximum Nominal VBS Supply voltage for electronics 9 0 V 13 2 V 16 0 V Ihs Handset current consumption 6 0 mA 8 0 mA 12 0 mA Vaudio Regulated audio voltage 7 7 V 8 3 V 8 7 V Iaudio Audio current consumption 6 0 mA 8 0 mA 12 0 mA AC Characteristics Microphone Side Microphone amplifier gain for nominal signal is approx 30 dB Max output level is 1 Vrms Idle noise of microphone amp...

Page 5: ... between the user and the phone environment The HSU 1 Au dio Handset consists of handset with coil cord and of cradle In the hand set there is earphone and microphone with corresponding ampli fiers There is also a simply interface for controlling these functions Elec tronics consist of DG1 handset module Mechanical dimensions are small and mechanics consists of A cover B cover and coil cord with t...

Page 6: ...set by resistors R14 R15 R16 and R17 R18 R19 is used to form side tone Ear piece capsule is connected to the PC board via connector X2 Resistors R20 R23 R26 and trimmer R22 attenuates Ear signal Attenuation is about 20 dB when the trimmer is at minimum position Microphone Amplifier Transistor V1 supplies bias voltage to Microphone Bias voltage is filtered by C20 C11 C12 C14 and resistors R12 R13 B...

Page 7: ...tor 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 amplifi ers is made byamplifier N2C TL074ID Regulated voltage 5 volts is de vided by resistors R1 and R2 and the amplified by N2C Capacitor C18 filters regulated voltage Block Diagram ...

Page 8: ...After Sales Technical Documentation Handset HSU 1 Page 8 Original 50 96 Circuit Diagram version 6 0 ...

Page 9: ...After Sales Technical Documentation Handset HSU 1 Page 9 Original 50 96 Layout Diagrams ...

Page 10: ...5 R020 1412254 Chip resistor 270 5 0 1 W 0805 R021 1414029 Chip resistor 3 3 k 5 0 1 W 0805 R022 1703319 Tpmet 0w5 2k2 m R024 1414004 Chip resistor 680 5 0 1 W 0805 R025 1413635 Chip resistor 100 k 5 0 1 W 0805 R026 1412409 Chip resistor 1 5 k 5 0 1 W 0805 R027 1414406 Chip resistor 5 6 k 5 0 1 W 0805 R028 1412729 Chip resistor 33 k 5 0 1 W 0805 R029 1412536 Chip resistor 22 k 5 0 1 W 0805 R030 14...

Page 11: ...mic cap 560 p 5 50 V 0805 C031 2310336 Ceramic cap 18 p 5 50 V 0805 C032 2310512 Ceramic cap 560 p 5 50 V 0805 C033 2310512 Ceramic cap 560 p 5 50 V 0805 C034 2310512 Ceramic cap 560 p 5 50 V 0805 C035 2310512 Ceramic cap 560 p 5 50 V 0805 C036 2310512 Ceramic cap 560 p 5 50 V 0805 C037 2310512 Ceramic cap 560 p 5 50 V 0805 L001 3608502 Chip coil 5 Q 28 35 MHz 1206 L002 3608502 Chip coil 5 Q 28 35...

Page 12: ... cover 2D 23153 HSU 1 6 9450305 Cradle bottom 2D 23154 HSU 1 8 9460098 Latch 3D 23155 HSU 1 9 9780086 Coil cord 4C 22857 HSU 1 10 6490220 Magnet 4D 21413 CRE 1 11 7313054 Magnet pad 4D 21422 CRE 1 12 9560015 Spring 4D 23498 HSU 1 13 9560001 Spindle 4D 21412 CRE 1 14 2 9480171 D shape sealing 4D 24417 15 6 6154430 PT screw KB25x8 FeZn clr 16 9380154 Label blank 4D 22419 23 8x17 5 16 9380154 Label H...

Page 13: ...entation Handset HSU 1 Page 13 Original 50 96 18 5140379 Cond microphone 62 3 dB 2 2 kΩ 6x5 19 5140578 Receiver capsule 103 2 dB 20 9510193 Earpiece clip 4D 24147 21 6291917 PT screw KB25x5 FeZn clr H1 0200221 Handset module DG 1 ...

Page 14: ...After Sales Technical Documentation Handset HSU 1 Page 14 Original 50 96 This page intentionally left blank ...

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