PANASONIC GD30, GD50 Service Manual

Service Manual
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GD30/GD50 Personal Cellular Telephone
Frequency range Tx: 890 - 915 MHz
Tx/Rx frequency separation 45 MHz 95 MHz RF channel bandwidth 200 kHz Number of RF channels 124 374 Speech coding Full rate/Half rate/Enhanced
Operating temperature -10°C to +55°C Type Class 4 Handheld Class 1 Handheld RF Output Power 2 W maximum 1 W maximum Modulation GMSK (BT = 0.3) Connection 8 ch/TDMA Voice digitizing 13 kbps RPE-LTP / 13 kps ACLEP / 5.6 kps CELP / VSLEP Transmission speed 270.3 kbps Diversity Frequency hopping Signal Reception Double superheterodyne Intermediate Frequencies 282 MHz and 45 MHz Antenna Terminal Impedance50 Antenna VSWR <2.1 : 1 Dimensions Height: 135 mm
Volume 123 cc (150 cc with EB-BLD30 Battery) Weight GD30: 130 g (170 g with EB-BLD30 Battery)
Display Graphical chip on glass liquid crystal, Alphanumeric,
Illumination 4 LEDs for the LCD (Green)
Keypad 17 keys, Navigation key SIM Plug-in type only External DC Supply Voltage3.6 V Battery EB-BSD30: 3.6 V nominal, 670mAh, Ni-MH
Standby Battery Life DRX 9
Conversation Battery Life PL 7, DTX 50%
Rx: 935 - 960 MHz
Full rate
Width: 45 mm Depth: 20.5 mm (30 mm with EB-BLD30 Battery)
GD50: 115 g (170 g with EB-BLD30 Battery)
16 x 3 characters, 5 icons and 6 x 1 characters
8 LEDs for the keypad (Green) 1 LED Incoming call (Green) 1 Charging LED (Red)
EB-BSD50: 3.6 V nominal, 670mAh, Li-Ion EB-BLD30: 3.6V 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
Order Number: MCUK991001C8
Handheld Portable
EB-GD30 EB-GD50
Specification
900 MHz 1800 MHz
Tx: 1710 - 1785 MHz Rx: 1805 - 1880 MHz
Full rate/Half rate
WARNING
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 ser products dealt with in this service manual by anyone else could result in serious injury or death.
Issue 1 Revision 0
ice or repair the product or
7 CIRCUIT DIAGRAMS
7.1 Main PCB: Top Level Diagram
CIRCUIT DIAGRAMS
BASEBAND
(Figure 7.2)
RF
(Figure 7.3)
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CIRCUIT DIAGRAMS
7.2 Main PCB: Baseband Overview
PSU
(Figure 7.4)
PROCESSOR
Figure 7.5
AUDIO
(Figure 7.6)
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7.3 Main PCB: RF Overview
CIRCUIT DIAGRAMS
PSU &
SYNTHESIZER
(Figure 7.9)
RECEIVER &
Tx MODULATOR
(Figure 7.7)
TRANSMITTER
(Figure 7.8)
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