After Sales Technical Documentation COMPACT HANDSFREE UNIT PHF–5 Original 05/97 NMP Part No.
Compact Handsfree Unit PHF–5 After Sales Technical Documentation AMENDMENT RECORD SHEET Amendment Number Page 2 Date Inserted By Comments Original 05/97
After Sales Compact Handsfree Unit PHF–5 Technical Documentation COMPACT HANDFREE UNIT PHF–5 Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Technical Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . List of Modules . .
Compact Handsfree Unit PHF–5 After Sales Technical Documentation Introduction General The PHF–5 is a compact handsfree unit for handportable telephones and it provides a possibility to use HF operation. The phone cannot be used as a handset but the PHF–5 can be upgraded with a handset and an antenna coupler. The hook off –signal is given to the phone when a handset is lifted from the hook. The PHF–5 has an internal speaker and external microphone.
After Sales Compact Handsfree Unit PHF–5 Technical Documentation Modes of Operation Power Off The module does not receive supply voltage from a charger to the d.c. connector. There are no voltages on the module. Power on/Mute on The d.c. voltage in the XEAR line is below 0.5 V. There is no audio input signal present. HF speaker amplifier and headset amplifier are muted. The current consumption is below 10 mA. Power on/Mute off The d.c. voltage in the XEAR line is above 1 V.
Compact Handsfree Unit PHF–5 After Sales Technical Documentation External Signals and Connections D.C. Supply Connector X100 Pin: Signal name: Function: 1 GND Ground 2 VCC Input from charger • min/max voltage: 5.5...10.8 V d.c. • min/typ/max current: 740...780...820 mA d.c. LCH–6 or LCM–1 • min current: 285 mA d.c.
After Sales Compact Handsfree Unit PHF–5 Technical Documentation Handset/Headset Connector X400 Pin: Signal name: Function: 1 GND Ground 2 HMIC Microphone signal • typical/max. voltage: 0.7...15 mV • min/typ/max. bias voltage: 2...3.2...4.4 V d.c. 3 HEAR Speaker signal • min/typ/max. voltage: 0...60...
Compact Handsfree Unit PHF–5 After Sales Technical Documentation CAP interface This block converts signal levels and also provides single–ended to differential and level conversions as well as hook pulldown and device identification. Audio In The circuit performs differential to single–ended conversion of incoming audio signal. The function is: EAR = SGND–XEAR (Gain is 0 dB). Output d.c. bias in EAR line is 2 V, input is a.c. coupled, and the stage tolerates about ±1.
After Sales Compact Handsfree Unit PHF–5 Technical Documentation but this doubles the power consumption and temperature rise of the IC and therefore it might reduce lifetime. The amplifier is on when HFMUTE is off (below 2.4 V). Headset Capsule Amplifier This block is a current booster block that doubles the EAR input voltage but has significant output impedance together with input protection block (100 Ω). The load of the handset is also 100 Ω, so the actual gain is 0 dB for handset.
Compact Handsfree Unit PHF–5 After Sales Technical Documentation Hookoff Sense This block monitors the handset microphone current and provides HOOKOFF and EXTAUD signals. The current of the 2.2 kΩ bias resistor of the handset microphone preamplifier block is monitored (by monitoring voltage drop) and if the d.c. resistance of the handset microphone is less than about 50 kΩ, the HOOKOFF line is tied high (above 3 V), othervise low (below 0.1 V).
After Sales Compact Handsfree Unit PHF–5 Technical Documentation Power and Control Line Usage of Blocks Block: Power line: Input Protection Diode pairs – to VCC & GND – CAP Interface +5 V +2 V HOOKOFF 5 V Regulation VCC – – Gives +5V line out 2 V and 4 V Regulation +5 V – – Gives VSTAB and +2V lines out Speaker Amplifier +5 V internal biasing HFMUTE Handset Capsule Amplifier +5 V +2 V HFMUTE HF microphone preamplifier VSTAB VSTAB – for mic, internal biasing output pulldown w
Compact Handsfree Unit PHF–5 After Sales Technical Documentation Block Diagram Speaker spring pads sp– X400 Handset connector sp+ hear X300 Microphone connector hmic hfmic X100 DC connector X200 6–pin cable connector vcc hook xmic sgnd xear Input protection, ref = 100..199 sp– sp+ hearp xmicp hmicp Handset microphone preamplifier, ref = 510..519 Av = 17 dB hfmicp hookp HF microphone preamplifier, ref = 500..509 Av = 10 dB xearp sgndp vcc CAP interface, ref = 300..
After Sales Compact Handsfree Unit PHF–5 Technical Documentation Circuit Diagram of DH6 (Versio 12 Edit 148) Original 05/97 Page 13
Compact Handsfree Unit PHF–5 After Sales Technical Documentation Layout Diagram of DH6 for layout version 12 Page 14 Original 05/97
After Sales Compact Handsfree Unit PHF–5 Technical Documentation Part List of DH6 (EDMS Issue 7.
Compact Handsfree Unit PHF–5 After Sales Technical Documentation R430 R431 R432 R433 R434 R435 R436 R460 R461 R500 R501 R502 R503 R510 R511 R512 R513 R530 R531 R532 R533 R534 C100 C101 C102 C103 C104 C105 C106 C107 C108 C109 C110 C111 C112 C113 C114 C115 C116 C117 C118 C119 C120 C121 C122 C123 C124 C130 Page 16 1430087 1430095 1430167 1430167 1430167 1430065 1430087 1430071 1430091 1430065 1430043 1430087 1430071 1430065 1430043 1430087 1430065 1430071 1430095 1430043 1430071 1430095 2310791 2320091 232
After Sales Compact Handsfree Unit PHF–5 Technical Documentation C200 C202 C203 C250 C251 C252 C253 C255 C270 C281 C282 C300 C301 C304 C305 C306 C307 C308 C309 C310 C430 C431 C432 C433 C460 C462 C464 C465 C500 C501 C502 C504 C510 C511 C512 C530 C531 C533 Z103 Z105 Z106 Z107 Z108 Z109 Z110 Z111 V100 V101 2320091 2517848 2611668 2320091 2611668 2611668 2611668 2320091 2611668 2604209 2310791 2320063 2604209 2320063 2604209 2611668 2611668 2320063 2320063 2604209 2320063 2611668 2604209 2320063 2604209 2320
Compact Handsfree Unit PHF–5 After Sales Technical Documentation V102 V103 V104 V250 V280 V281 V300 V430 V460 V500 V510 V530 N100 N101 N200 X100 X200 X300 X400 Page 18 4100285 4100285 4100285 4200917 4200917 4200917 4200917 4200909 4340303 4200917 4200917 4200917 4301182 4301182 4340065 5409003 5409015 5400017 5400017 9854073 9854073 Diode x 2 BAV99 Diode x 2 BAV99 Diode x 2 BAV99 Transistor BC848B/BCW32 Transistor BC848B/BCW32 Transistor BC848B/BCW32 Transistor BC848B/BCW32 Transistor BC858B/BCW30 IC,
After Sales Compact Handsfree Unit PHF–5 Technical Documentation Exploded View Original 05/97 Page 19
Compact Handsfree Unit PHF–5 After Sales Technical Documentation Assembly Parts ITEM 1 2 3 4 5 6 or 6 7 8 9 10 11 Q’TY CODE DESCRIPTION VALUE, TYPE Front cover Dust shield Loudspeaker 1W 15R HF speaker module RF shield Connectin wires Connecting spring Compact HF cable Acoustic foam Back cover PT screw KB25X7 Label blank DMD00055 DMD00068 D64MM H19MM 2 2 9450571 9480214 5140013 0200658 9510259 710F000 9510260 9780145 9480212 9450570 6291928 9380154 5 Page 20 DMD00052 DMD00051 4C 24532 DMD00067
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