Nokia PHF–5 After Sales Technical
After Sales Technical Documentation
COMPACT HANDSFREE
UNIT PHF–5
Original 05/97 NMP Part No. 0275040
Compact Handsfree Unit PHF–5
AMENDMENT RECORD SHEET
After Sales
Technical Documentation
Amendment
Number
Date Inserted By Comments
Page 2
Original 05/97
After Sales
Technical Documentation
Compact Handsfree Unit PHF–5
COMPACT HANDFREE UNIT PHF–5
Contents
Introduction Page 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Page 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Summary Page 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation Page 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Modules Page 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Basic Specifications Page 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Modes of Operation Page 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Modes of Audio Output Destination and Hook Page 5. . . . . . . . . . . .
Switching Delay between Handset Mode to/from HF Mode Page 5.
External Signals and Connections Page 6. . . . . . . . . . . . . . . . . . . . . .
Circuit Description Page 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connectors Page 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Protection Page 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CAP interface Page 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio In Page 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio Out Page 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Device Identification Page 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hook Page 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 V Regulation Page 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 V and 4 V Regulation Page 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Speaker Amplifier Page 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headset Capsule Amplifier Page 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HF Microphone Preamplifier Page 9. . . . . . . . . . . . . . . . . . . . . . . . . . .
Handset Microphone Preamplifier Page 9. . . . . . . . . . . . . . . . . . . . . . .
Microphone Amplifier Page 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hookoff Sense Page 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Muting Logic Page 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power and Control Line Usage of Blocks Page 11. . . . . . . . . . . . . . . . . . .
Block Diagram Page 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Diagram of DH6 (Versio 12 Edit 148 Code 0200658) Page 13. .
Layout Diagram of DH6 for layout version 12 Page 14. . . . . . . . . . . . . . .
Part List of DH6 (EDMS Issue 7.0 Code: 0200658)) Page 15. . . . . . . . .
Exploded View Page 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly Parts Page 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Original 05/97
Page 3
Compact Handsfree Unit PHF–5
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.
Technical Summary
Operation
The PHF–5 can be powered by LCH–6 or LCM–1 rapid chargers to provide
rapid charging for the phone also during a HF call. The LCH–8 tricle charger is
not recommended for powering the PHF–5 because during a HF call there will
be insufficient charging current available for the phone.
After Sales
Technical Documentation
The phone is connected to the unit by a system connector. The cable length
including the connector housing is 15 cm. The other connectors are d.c. jack
(input from the charger), microphone connector and a handset connector.
There is no RF connector or external speaker connector in the PHF–5.
The PHF–5 has an internal HF–speaker.
List of Modules
Name of Module: Material Code:
HF speaker module DH–6 0200658
Assembly parts MPHF–5 0260677
Basic Specifications
Function: Value:
Input voltage 5.5...11 V d.c. typical range is
Current consumption 60 mA typical average during HF call
6.5...7.5 V with LCH–6
Page 4
Power source LCH–6 or LCM–1 charger
Original 05/97
After Sales
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. If there is no handset connected
or the handset is on hook, the XEAR signal is routed to the HF speaker and the
HF microphone signal is routed to the XMIC line. If the handset is off hook, the
XEAR signal is routed to the handset speaker and the handset microphone signal is passed to the XMIC line.
Compact Handsfree Unit PHF–5
Modes of Audio Output Destination and Hook
The audio output is routed to handset connector if
– a handset is connected and it is lifted from the cradle
– a headset is connected
– a button headset is connected
Otherwise the audio output is routed to the internal speaker and HF micro-
phone signal is routed to XMIC.
The hook off signal is passed to the phone if audio output is routed to external
device. This means that whether a normal or a button headset is connected,
the hook is also always off.
Switching Delay between Handset Mode to/from HF Mode
The internal logic for audio routing and hook signal includes a delay, which is to
prevent erroneous behaviour of the whole system when switching between
modes.
The hook signal for phone is given without any delay.
The audio routing is delayed for about 0.5 seconds, when the audio routing is
to change from handset mode to HF mode. The delay is below 100 milliseconds, when the audio routing is to change from HF mode to handset mode.
Original 05/97
Page 5
Compact Handsfree Unit PHF–5
External Signals and Connections
D.C. Supply Connector X100
Pin: Signal name: Function:
1 GND Ground
2 VCC Input from charger
• min/max voltage:
• min/typ/max current: 740...780...820 mA d.c.
LCH–6 or LCM–1
• min current: 285 mA d.c. LCH–8,
not recommended
System Connector X250 (and System Cable Connector X200)
Pin(X200) Signal name: Function:
1 (1) GND Digital ground
After Sales
Technical Documentation
5.5...10.8 V d.c.
2 (6) XMIC Microphone signal
3 (5) SGND Signal ground
5 (2) V_IN Charge output for phone, connected to VCC
6 (4) XEAR Speaker signal
12 (3) HOOK Hook off to phone
HF Microphone Connector X300
Pin: Signal name: Function:
1 GND Ground
• nominal voltage: 60 mV
• ld resistor/PHF–5: 22 kΩ to GND
• ld resistor/hook off: 22 kΩ to GND
• HF call min/typ/max curr: 630...730...810 mA
• mute on min/typ/max curr: 730...775...820 mA
• typ/max voltage: 60...694 mV
• mute on voltage: 0...0.5 V d.c.
• mute off voltage: 1...1.6...2 V d.c.
• min/typ/max voltage: 0...0.2...0.4 V
pulldown at hook off
Page 6
2 HFMIC Microphone signal
• typical/max. voltage: 2...30 mV
• min/typ/max. bias voltage: 2...3.2...4.4 V d.c.
with load
Original 05/97
Loading...