Panasonic EB-GD30 Technical Manual
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Panasonic EB-GD30 Technical Manual

Panasonic EB-GD30 Technical Manual

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Technical Guide
GD30/GD50 Personal Cellular Telephone
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or
cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or
products dealt with in this service manual by anyone else could result in serious injury or death.
Issue 1
Revision 0
Frequency range
Tx/Rx frequency separation
RF channel bandwidth
Number of RF channels
Speech coding
Operating temperature
Type
RF Output Power
Modulation
Connection
Voice digitizing
Transmission speed
Diversity
Signal Reception
Intermediate Frequencies
Antenna Terminal Impedance
Antenna VSWR
Dimensions
Volume
Weight
Display
Illumination
Keypad
SIM
External DC Supply Voltage
Battery
Standby Battery Life
DRX 9
Conversation Battery Life
PL 7, DTX 50%
WARNING
Order Number: MCUK991001G8
Handheld Portable
Specification
900 MHz
Tx: 890 - 915 MHz
Tx: 1710 - 1785 MHz
Rx: 935 - 960 MHz
Rx: 1805 - 1880 MHz
45 MHz
200 kHz
124
Full rate/Half rate/Enhanced
Full rate/Half rate
Full rate
-10°C to +55°C
Class 4 Handheld
Class 1 Handheld
2 W maximum
1 W maximum
GMSK (BT = 0.3)
8 ch/TDMA
13 kbps RPE-LTP / 13 kps ACLEP / 5.6 kps CELP / VSLEP
270.3 kbps
Frequency hopping
Double superheterodyne
282 MHz and 45 MHz
50 Ω
<2.1 : 1
Height: 135 mm
Width:
45 mm
Depth:
20.5 mm (30 mm with EB-BLD30 Battery)
123 cc (150 cc with EB-BLD30 Battery)
GD30: 130 g with EB-BSD30 Battery (170 g with EB-BLD30)
GD50: 115 g with EB-BSD50 Battery (170 g with EB-BLD30)
Graphical chip on glass liquid crystal, Alphanumeric,
16 x 3 characters, 5 icons and 6 x 1 characters
4 LEDs for the LCD (Green)
8 LEDs for the keypad (Green)
1 LED Incoming call (Green)
1 Charging LED (Red)
17 keys, Navigation key
Plug-in type only
3.6 V
EB-BSD30: 3.6 V nominal, 670mAh, Ni-MH
EB-BSD50: 3.6 V nominal, 670mAh, Li-Ion
EB-BLD30: 3.6 V nominal, 1340mAh, Ni-MH
EB-BSD30/EB-BSD50: 95 hrs maximum
EB-BLD30: 190 hrs maximum
EB-BSD30/EB-BSD50: 180 minutes
EB-BLD30: 360 minutes
Battery life figures are dependent on network conditions.
EB-GD30
EB-GD50
1800 MHz
95 MHz
374

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  • Page 1 Order Number: MCUK991001G8 Technical Guide GD30/GD50 Personal Cellular Telephone Handheld Portable EB-GD30 EB-GD50 Specification 900 MHz 1800 MHz Frequency range Tx: 890 - 915 MHz Tx: 1710 - 1785 MHz Rx: 935 - 960 MHz Rx: 1805 - 1880 MHz...
  • Page 2 This Technical Guide is copyright and issued on the strict understanding that it is not to be reproduced, copied, or disclosed to any third party, either in whole or part, without the prior written consent of Matsushita Communication Industrial UK Ltd. Every care has been taken to ensure that the contents of this manual give an accurate representation of the equipment.

  • Page 3: Table Of Contents

    CONTENTS 1 INTRODUCTION Purpose of this Guide ......1 Structure of the Guide ......1 2 INTERFACES AND TEST POINTS Interfaces .
  • Page 4 This page is left intentionally blank. Issue 1 Section MCUK991001G8 Revision 0 – iv – Technical Guide...

  • Page 5: Introduction

    INTRODUCTION 1.1 Purpose of this Guide This guide contains technical information for the Panasonic GD30 personal cellular telephone system operating on the GSM network. Procedures for installing, operating and servicing (e.g. disassembly and testing) the telephone system are provided in the associated Service Manual.
  • Page 6 INTRODUCTION This page is left intentionally blank. Issue 1 Section 1 MCUK991001G8 Revision 0 – 2 – Technical Guide...

  • Page 7: Interfaces And Test Points

    INTERFACES AND TEST POINTS INTERFACES AND TEST POINTS 2.1 Interfaces 2.1.1 Main and Keypad PCBs The interface between Main and Keypad PCBs is made via a 32-way connector as follows: KBC(2) DATA(7) KBC(3) DATA(6) KBC(4) DATA(1) KBR(0) DATA(2) KBR(1) DATA(4) KBR(2) DATA(0) KBR(3)

  • Page 8: External Interface

    INTERFACES AND TEST POINTS 2.1.2 External Interface The GD30 and GD50 telephones have two external connectors: a multi-way connector for use with external accessories such as hands free kits and PC data card. additional contacts for charging the battery pack while inserted in the desktop charger. Main Unit <==>...
  • Page 9 INTERFACES AND TEST POINTS Name H/H <=> EXT Total Function H/H Circuit NON_HOOK <== Indicates if the optional second handset is on or off hook. In handsfree operation, if the optional handset is not fitted this signal defaults to on 100k hook.

  • Page 10: Sim Interface

    INTERFACES AND TEST POINTS Battery Connector Name H/H <=> EXT Total Function H/H Circuit VBAT <== Positive battery terminal. Li+ (2 cells in parallel): 3.6 V nom. NiMH (3 cells in series): 3.6 V nom. 10108-1 BAT_TEMP <== BAT_TEMP has 2 purposes. ChargerIC VREFOUT 1) Determine whether a battery is attached to the H/H.

  • Page 11: Test Points

    2.2 Test Points 2.2.1 Main PCB TP No. Signal TP No. Signal KBR(0) TP20 EAR_N TP1B TP21 EAR_P MICP TP22 IGNITION TP2B nBSCAN (U503 pin 92) TP23 SERIAL_IN VSVCXO TP24 SERIAL_OUT TP3B TDI (U503 pin 88) TP25 SIM_RST SIM_PWR TP26 MICN TP4B nRESET...

  • Page 12: Keypad Pcb

    INTERFACES AND TEST POINTS 2.2.2 Keypad PCB TP No. Signal EAR_P EAR_N DS12 DS11 DS10 TP10 TP11 TP12 TP13 TP14 TP15 CH LEDOUT TP16 PG LEDOUT TP17 BKLT OUT TP18 TP19 nPOWKEY TP20 KBR0 TP21 PAGING LED TP22 CHANNEL LED TP23 V(5) [LCD_CN1] Issue 1...

  • Page 13: Rf Overview

    RF OVERVIEW RF OVERVIEW 3.1 Introduction 3.1.1 General Specifications GD30/GD50 is a Dual Band product incorporating two switchable transceivers, one for the GSM900 band and another for the GSM1800 (DCS1800) band. The transmit and receive bands for the mobile are given in the table below: GSM900 890-915 MHz 935-960 MHz...
  • Page 14 RF OVERVIEW Issue 1 Section MCUK991001G8 Revision 0 – 10 – Technical Guide...
  • Page 15 RF OVERVIEW Rx 1st IF Rx 2nd IF 935-960MHz 45MHz 225MHz 45MHz 270MHz ÷2 ÷6 RF LO 1160-1185MHz Fdiff IF LO 270MHz 540MHz ÷2 270MHz Fcomparison TX VCO 270MHz 890-915MHz 10150-1 Figure 3.2: GSM 900 Frequency Plan Rx 1st IF Rx 2nd IF 1805-1880MHz 225MHz...

  • Page 16: Rf & Accessory Connector

    RF OVERVIEW 3.2.3 Antenna The antenna is a fixed helical type. A mechanical RF switch is used to route the RF signal from the external antenna for handsfree operation and test purposes. 3.2.4 Transmit and Receive The transmit and receive paths of GD30/GD50 are covered in their own specific chapters later in this manual. 3.3 RF &...

  • Page 17: Transmitter

    TRANSMITTER TRANSMITTER 4.1 Introduction This section provides a technical description of the transmitter circuit of the RF circuit. A circuit diagram of the whole system is provided in the Service Manual. 4.2 Uplink Frequencies 4.2.1 GSM 900 The uplink frequencies for the GSM 900 band can be calculated as follows: CHANNEL UPLINK FREQUENCIES (MHz) NUMBERS...

  • Page 18: Functional Description

    TRANSMITTER 4.3 Functional Description Dual Band Receiver (PART) U701 Modulator U800 Mixer Antenna Diplexer + Sw. Phase S701 Detector Exciter U802 900 MHz Coupler E801 Loop Dual Band Filter Tx VCO U702 1800 1800 MHz Coupler E800 Dual Band PA U801 10153-1 Figure 4.1: Transmitter...

  • Page 19: Receiver

    RECEIVER RECEIVER 5.1 Introduction This Section provides a technical description of the receiver section of the RF circuit. A complete circuit diagram is provided in the Service Manual. 5.2 Downlink Frequencies 5.2.1 GSM 900 The downlink frequencies for the GSM 900 band can be calculated as follows: CHANNEL DOWNLINK FREQUENCIES (MHz) NUMBERS...

  • Page 20: Functional Description

    RECEIVER 5.3 Functional Description 5.3.1 Dual Band Receiver IC The main building block for the Dual Band Receiver is the Hitachi Bright2 IC. The receiver is a triple superheterodyne type with the 1st IF at 225 MHz and 2nd IF at 45 MHz. The intermediate frequencies are common to both frequency bands. The Rx IC contains the following stages: Gain controlled 1st mixer for GSM 900 band.
  • Page 21 RECEIVER The DC level at the output of the Op Amps is 1.35 V with a 200 mV p-p single ended AC swing sufficient to drive the baseband VEGA. The coupling between the RF output and the baseband output has been designed as DC coupling in order to minimise the turn-on time of the Rx IC.
  • Page 22 RECEIVER This page is left intentionally blank. Issue 1 Section 5 MCUK991001G8 Revision 0 – 18 – Technical Guide...

  • Page 23: Baseband Overview

    BASEBAND OVERVIEW BASEBAND OVERVIEW 6.1 Introduction The main Baseband circuitry is located with the RF circuits on the Main PCB, while the keypad, LCD and backlights are located on the Keypad PCB. A metallised plastic chassis is used to separate the Main and the Keypad PCBs. The continuous chassis design is important for EMC purposes.
  • Page 24 BASEBAND OVERVIEW 6.2.1 Keypad The Keypad has a 5 x 5 matrix in rows and columns, allowing 25 keys to be scanned. Each row has a built-in pull-up resistor and the column line outputs are selected low. On a key press, the row input is pulled low by the corresponding column generating a keypad interrupt.

  • Page 25: Cpu Memory

    BASEBAND OVERVIEW There are not enough general purpose I/O lines available on GEMINI, so eight additional signal lines are provided by the port expander. To control the additional lines, the data bus lines D0 to D7 are used along with RnW and a dedicated nCS(0) line. The ‘D’...

  • Page 26: Real Time Clock

    BASEBAND OVERVIEW 6.2.6 LCD The LCD assembly is a sub-assembly comprising the LCD glass and driver chip on a flexible PCB with connection to the Keypad PCB via zebra strip connectors. A 96 x 58 pixel graphical display is used to give maximum information. It can also display Chinese characters and large characters, e.g., 12 characters x 2 lines or 16 characters x 3 lines, both with two lines of icons.
  • Page 27 BASEBAND OVERVIEW When using the hands free feature, GSM requires that the sending audio frequency response must fit within the mask shown below. 1000 10000 Frequency (Hz) 10070-1 Figure 6.6: Hands Free GSM Transmit Audio frequency response mask 6.2.9 Speaker Because Vega runs from a 2.7 V supply, a low impedance (dynamic) speaker must be used.
  • Page 28 BASEBAND OVERVIEW When using the internal Handsfree feature, the receive audio frequency response must fit within the mask shown below. 1000 10000 Frequency (Hz) 10072-1 Figure 6.8: Handsfree GSM Transmit Audio frequency response mask 6.2.10 Desktop Hands Free Mode (GD50 only) In handheld mode, the speaker is driven by the ear-piece amplifier inside VEGA U504.
  • Page 29 BASEBAND OVERVIEW 6.2.11 Buzzer The volume level of the buzzer is defined by the 6 bit PWM register setting in GEMINI I/O. The buzzer tone is then superimposed on this level using software. Timer 1 in GEMINI is used to time the period between switching the buzzer on and off to make the tone. For more complex buzzer ringing tones, the buzzer volume level can also be altered after each time-out of Timer 1.
  • Page 30 BASEBAND OVERVIEW This page is left intentionally blank. Issue 1 Section 6 MCUK991001G8 Revision 0 – 26 – Technical Guide...

  • Page 31: Gemini

    GEMINI GEMINI 7.1 Introduction Gemini contains the DSP, CPU and GSM timing functions and many peripheral functions. The software for the DSP is contained in masked ROM. 7.2 Functional Description SPEECH BASEBAND INTERFACE INTERFACE TDMA TIMER CORE 10087-1 Figure 7.1: GEMINI Block Diagram 7.2.1 Digital Signal Processor The Digital Signal Processor (DSP) core is compatible with the Texas Instruments TMS350C5xx family of DSPs.

  • Page 32: Memory Interface

    GEMINI 7.2.3 Memory Interface The memory interface allows the 32 bit CPU to access 16 and 8 bit devices, and allows the addition of wait states to memory access. The memory interface allows between 0 and 7 wait states to be added. The ROM area is hardware write protected, a FLASH write enable bit in the ROM wait state configuration register can be used to enable write access the ROM area.
  • Page 33 GEMINI 7.2.5 General Purpose I/O The general purpose I/O includes keypad scanning, two PWM ports and 16 general purpose I/O lines. The I/O lines are multiplexed onto other functions, if I/O is selected the other function is unavailable. I/O Pin Assignments Signal Name Pin No.
  • Page 34 GEMINI This page is left intentionally blank. Issue 1 Section 7 MCUK991001G8 Revision 0 – 30 – Technical Guide...

  • Page 35: Vega

    VEGA VEGA 8.1 Introduction VEGA contains the interface circuits to the Audio, RF and auxiliary analogue functions for the baseband circuit. 8.2 Functional Description TIMING JTAG SIGMA FILTER DELTA 10 bit FILTER I DAC BURST GMSK STORE 10 bit FILTER Q DAC SIGMA FILTER...
  • Page 36 VEGA 8.2.2 Downlink I and Q Offset Offset Calibration Register DLIP Antialiasing Sigma_Delta SINC Filter Modulator Filter Filter DLIN To baseband serial interface fs1=6.5 MHz fs2=1.08 MHz fs3=270.8 kHz DLQP Antialiasing Sigma_Delta SINC Filter Modulator Filter Filter DLQN Offset Offset Calibration Register 10090-1...
  • Page 37 VEGA 8.2.4 AFC Control The 13 MHz system clock frequency is controlled by a 13 bit sigma-delta D/A in the VEGA chip 3/5V 1-BIT DAC 13-BIT DIGITAL & LOW-PASS MODULATOR FILTER OUTPUT SWING CONTROL VTCXO RINT1 RINT2 PROGRAMMATION REGISTER CEXT 10092-1 Figure 8.5: AFC block diagram 8.2.5 Audio...
  • Page 38 VEGA Voice Downlink Path Auxiliary AUXO Amplifier EARP Smoothing From voice Earphone Sigma_Delta SINC One bit Filter serial Bandpass Interpolation Volume Cont interface EARN Modulator Filter Amplifier Filter & PGA fs1=1MHz fs2=40KHz fs3=8.0KHz 10094-1 Figure 8.7: Voice DAC block diagram 8.2.6 Auxiliary A/D VEGA provides five A/D inputs.

  • Page 39: Power Supplies

    POWER SUPPLIES POWER SUPPLIES 9.1 Introduction This section describes the Power Supply Unit (PSU) used on the GD30/GD50 Main PCB and the method by which it is controlled. The Battery life during GSM 1800 operation benefits from lower transmit power and higher PA efficiency and is therefore more efficient than when operating in GSM 900.

  • Page 40: Power-Down

    POWER SUPPLIES 9.3.3 Power-up Sequence The power-up sequence can be initiated by pressing the power key, or by applying a power source to the EXT_PWR signal line. Both enable the linear regulators and the CPU becomes active. The CPU must then check the battery condition; if the phone is not required to power-down or sleep immediately, the result must be OK or LOW.

  • Page 41: Power Management

    POWER SUPPLIES 9.5 Power Management 9.5.1 Overview The power supply circuit supplies regulated power to the base-band parts, controls battery charging and monitors battery usage. The Power Management section consists of five parts as follows: Power Source. Power On/Off Control & Power Source Failure. Voltage Regulation.
  • Page 42 POWER SUPPLIES Issue 1 Section MCUK991001G8 Revision 0 – 38 – Technical Guide...

  • Page 43: Voltage Regulation

    POWER SUPPLIES 9.5.3 Power On/Off Control The hardware model for the Power On/Off Control and Power Source Failure functions can be expressed by the following boolean expression and logic diagram. On/Off = VBAT + (LOGIC_PWR · RTC_INT · (nLVA_INT + (nPOWKEY · nIGNITION · nEXT_PWR))) nLVA_INT nPOWKEY nIGNITION...
  • Page 44 POWER SUPPLIES D1V8: Power supply for GEMINI process version 1833C07 (ARM, DSP and ASIC) Voltage 1.8 V ± 3% Current 120 mA max. A2V8: Baseband power supply for Analogue circuitry (VEGA, microphone and speaker) Voltage 2.8 V ± 3% Current 100 mA max.
  • Page 45 POWER SUPPLIES 9.5.7 Accessory Control GD30/GD50 can detect accessories connected to its I/O connector and control the power supply to them. These are controlled by the signals detailed in the following table. Inputs Outputs Peripherals nLogic_ HF_ON Charger Ext_Pwr Ignition nHFsense adp_sense nON_HOOK...

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