Giant Electronics MBO Alpha 28xx, MBO Alpha 27xx, MBO Alpha 26xx Service Manual
Giant Electronics ltd. Service manual for DECT phone rev.: 01
SERVICE MANUAL
(FOR MBO Alpha 26xx / 27xx / 28xx)
PAGE: 1 / 42
Giant Electronics ltd. Service manual for DECT phone rev.: 01
CONTENTS
z MODEL SPECIFICATION -------------------------------------------------- P3
z FEATURES LIST ------------------------------------------------------------- P4
z PRODUCTION TECHNICAL SPECIFICATION -------------- P05 ~ P12
z OPERATION MANUAL ------------------------------------------- P13 ~ P34
z MAIN PARTS DESCRIPTIONS ------------------------------------------ P35
z BASE RF CIRCUIT DIAGRAM ------------------------------------------ P36
z HANDSET RF CIRCUIT DIAGRAM ------------------------------------ P36
z HANDSET PROCESSOR CIRCUIT DIAGRAM ---------------------- P37
z BASE PROCESSOR CIRCUIT DIAGRAM ---------------------------- P38
z BASE LINE INTERFACE CIRCUIT DIAGRAM --------------------- P38
z BASE POWER & LEDS CIRCUIT DIAGRAM ----------------------- P39
z BASE MAIN ASSEMBLY LAYOUT DRAWING -------------------- P40
z HANDSET MAIN ASSEMBLY LAYOUT DRAWING ------------- P41
z BASE & HANDSET RF ASSEMBLY LAYOUT DRAWING ------ P42
PAGE: 2 / 42
Giant Electronics ltd. Service manual for DECT phone rev.: 01
MODEL SPECIFICATION
GENERAL DESCRIPTION
DECT TDMA: Time Division multiple Access
z
DECT uses 10 frequency bands and time division multiplexing. Each channel
z
has a frame structure. A DECT frame of 10 milliseconds is divided into 2 X 12
timeslots. Therefore one cell can handle up to 120 slots.
LCD display and Hands-free in handset (portable part)
z
SUPPLY POWER
HANDSET : 2X1.2V AAA 600mAhr Ni-MH rechargeable batteries
z
BASE : AC230V DC7V 300mA / AC7V 150mA adaptor
z
POSSIBLE RANGE
OPEN SPACE : UP TO 300 METERS
z
IN BUILDING : UP TO 50 METERS
z
WEIGHT
HANDSET : Less than 120g (with batteries)
z
BASE : 180g
z
SIZE (L x W x H)
HANDSET : 135x50x26
z
BASESET : 115x80x115
z
LIST OF STANDARD ITEMS
Cordless handset (portable part) ------------------------------------- 1 pc
z
Base station (fixed part) ---------------------------------------------- 1 pc
z
Battery pack ……………………………………………………. 1 pc
z
AC adaptor -------------------------------------------------------------- 1 pc
z
Telephone line cord --------------------------------------------------- 1 pc
z
Belt chip for handset …………………………………………… 1 pc
z
Instruction manual, single color ……………………………….. 1 pc
z
Gift box with inner box ………………………………………. 1 pc
z
PAGE: 3 / 42
Giant Electronics ltd. Service manual for DECT phone rev.: 01
FEATURES LIST
z Digital, cordless, easy to use telephone complying to DECT/GAP standards.
z CID function with caller list for 20 numbers or names from phonebook (network-
dependent).
z Alphanumeric LC display.
z Exchangeable top covers.
z Telephone directory (phonebook) for 40 entries with names and telephone numbers.
z Extended redialing for 10 numbers.
z Microphone muting function.
z Acoustic battery and range warning signals.
z 10 incoming call ringing melodies.
z Headset connection.
z Can be expanded for use with up to 5 mobile handsets.
z Operation of a handset on up to 4 base stations.
z Paging function from base station to handset.
z Programmable call barring.
z Key lock.
z DTMF, Flash.
z Up to 150 hours standby.
z Up to 12 hours continuous call time.
z Operation via 2 standard batteries, AAA type. ( micro, Ni-MH)
z Hands-free calling using the handset.
ANSWERING MACHINE PART
z Fully digital answering machine
z Adjustable call acceptance, 2-7 rings
z Date and time display for each message ( network-dependent)
z Answering machine operati0on via the handset
z Remote control option
z Security code
PAGE: 4 / 42
Giant Electronics ltd. Service manual for DECT phone rev.: 01
PRODUCTION TECHNICAL SPECIFICATION
1. 8GHz DECT Telephone
PAGE: 5 / 42
Giant Electronics ltd. Service manual for DECT phone rev.: 01
TECHNICAL SPECIFICATION
ELECTRICAL
PRODUCTION LIMIT
FIX PART PORTABLE PART REMARK
TESTING CONDITIONS
Supply
Temperature
Humidity
RADIO SECTION
Frequency Range 1880 MHz ~ 1900 MHz 1880 MHz ~ 1900 MHz
Number Of Channels 10 10
Channel Frequency RX TX RX TX
Channel 0 1881.792 MHz
Channel 1 1883.520 MHz
Channel 2 1885.248 MHz
Channel 3 1886.976 MHz
Channel 4 1888.704 MHz
Channel 5 1890.432 MHz
Channel 6 1892.160 MHz
Channel 7 1893.888 MHz
Channel 8 1895.616 MHz
Channel 9 1897.344 MHz
Frequency Stability
Modulation Method GFSK GFSK
Frequency Deviation
Maximum positive B-Field part 3
Maximum negative B-Field part 3
NTP Power 20 +6/ -2 dBm 20 +6/ -2 dBm 50 ohm Termination
Receiver Sensitivity
BER ≤ 0.0001
Jitter
Radio Regulation EN 301 406 EN 301 406
230VAC ± 10%, 50Hz 2.6V ± 0.1V
25 ± 10°C 25 ± 10°C
65 ± 20% 65 ± 20%
fc ± 65kHz fc ± 65kHz @20 ± 10°C
+203 / +403 KHz +203 / +403 KHz @CMD60
-403 / -203 KHz -403 / -203 KHz @CMD60
≤
-88 dBm
0 ± 1µs0
0 ± 100ns 0 ± 100 ns
≤
-88 dBm
±
1 µs
unless otherwise stated
unless otherwise stated
unless otherwise stated
Slot - Slot
Bit - Bit
LINE INTERFACE
DTMF SIGNALING
DTMF Freq. Tolerance:
697Hz
770Hz
852Hz
941Hz
1209Hz
1336Hz
1477Hz
Tone Level: Low Group
High Group
Twist (HG > LG)
< ± 1.5%
< ± 1.5%
< ± 1.5%
< ± 1.5%
< ± 1.5%
< ± 1.5%
< ± 1.5%
-13.0 ∼ -8.5 dBV
-11.0 ∼ -6.5 dBV
1 ∼ 4.5 dB
PAGE: 6 / 42
X Low Group, Row 1,2,3
X Low Group, Row 4,5,6
X Low Group, Row 7,8,9
X
X
X High Group, Col 2,5,8,0
X High Group, Col 3,6,9,#
X
X
X
Low Group, Row ∗,0,#
High Group, Col 1,4,7,
∗
Giant Electronics ltd. Service manual for DECT phone rev.: 01
S
PRODUCTION LIMIT
FIX PART PORTABLE PART REMARK
Tone Dial Digit Period, Td
Inter-digit Period, Tid
Mute Level
Unwanted Freq. Component
Pulse Dial Signaling See Table 1 Country specific
Flash Duration See Table 1 X Country specific
Maximum Ringer Stop Voltage X
Minimum Ringer Start Voltage X
Ringer Impedance @25Hz / 50Hz
On Hook DC Resistance
@100Vdc T/R-Earth
On Hook DC Resistance
@100Vdc T-R
Off Hook DC Characteristics See Table 2 and Figure1 X I-CTR 37
On Hook AC Impedance
@ 300~3400Hz, 20mA, 50Vdc
Off Hook AC Impedance
Leakage Current between
Simplexed Tips & Ring to Charge
Contacts
Line Interface Regulation EN 300 001, I-CTR 37,
65 ∼ 90 ms
≥
65 ms
≥
20 dB
<
20 dB
>
4 k ohm
≥
Ω
10M
≥
Ω
1M
>
Ω
10k
270 + (750 ⁄⁄ 150nF)
≤
3.5mA @1kVrms
for 1sec.
CTR 38
X
X
XI-CTR 37
X
XI-CTR 37
XI-CTR 37
X EN 300 001 4.1.1
XI-CTR 37
X
PULSE DIAL SIGNALING
Flash(Address 0X1CF)
Table 1- Country Specific: Pulse Dial Signaling and Flash Duration
C180x
peed
Make
Break
Pre-pulse 20ms
Post-pulse 20ms
Break Duration
10±1pps
60±4ms
PAGE: 7 / 42
Giant Electronics ltd. Service manual for DECT phone rev.: 01
Point Voltage (V) Current (mA)
A9,0 0
B 9,0 20,0
C 14,5 42,0
D 40,0 50,0
E 40,0 60,0
F 0 60,0
NOTE: Limits for intermediate currents can be found
by drawing a straight line between the break points on a
linear voltage/current scale.
G0 0
Table 2 - TE Voltage/Current Characteristics
U(V)
40
14,5
D
C
9,0
A B
G
0
0204260
F
50
Figure 1: TE voltage/current characteristics
E
Not to scale
I (mA)
PAGE: 8 / 42
Giant Electronics ltd. Service manual for DECT phone rev.: 01
PRODUCTION LIMIT
FIX PART PORTABLE PART REMARK
ACOUSTIC RESPONSE
SLR (Sending Loudness Rating) TBR10
@ 2800 ~ 1000 ohm +/- 4dB X Refer to acoustic sample
@ 500 ohm +/- 4dB X Refer to acoustic sample
Sending Response See Figure 2 and Table 3 X CTR 38
Sending Distortion CTR 38
@1KHz,-4.7dBPa < 7% X
@500Hz,-4.7dBPa < 7% X
@1KHz, +5dBPa < 10% X
RLR
(Receiving Loudness Rating)
@ 2800 ~ 1000 ohm X +/- 4dB PP@volume 3 Refer to acoustic sample
@ 500 ohm X +/- 4dB PP@volume 3 Refer to acoustic sample
Receiving Response See Figure 3 and Table 4 X CTR 38
Receiving Distortion CTR 38
@1KHz,-12dBV X < 7%
@500Hz,-12dBV X < 7%
@1KHz, 0dBV X < 7%
STMR X > 10 dB
Sending Noise X
Receiving Noise X
Return Loss – Impedance
@200∼300 Hz
@300∼4000 Hz
Echo Return Loss
@300∼3400Hz
Receiver Volume: Hi/Normal X
Acoustic Reference CTR 38
>
6 dB
>
8 dB
>
14 dB
XI-CTR 37
X
XCTR 38
X 500 ~ 2500 Hz
≥
6 dB
Ω
2×1400
Ω
2×1400
Ω
2×800
CTR 38
Ω
2×1400
Ω
2×1400
Ω
2×800
2×500Ω, Zr
PAGE: 9 / 42
Giant Electronics ltd. Service manual for DECT phone rev.: 01
Frequency (Hz) dB relative to arbitrary level
Upper limit 100 -6
2000 +7
4000 +7
8000 -13
Lower limit 300 -14
2000 -6
3400 -11
Table 3 - Co-ordinates of Sending Sensitivity Limit Curves
Co-ordination of Sending Sensitivity
Limit Curves
10
5
0
-5
zero
-10
-15
-20
Sensitivity dB relative arbitrary
100 1000 10000
Figure 2: Co-ordination of Sending Sensitivity Limit Curves
Frequency (Hz)
PAGE: 10 / 42
Giant Electronics ltd. Service manual for DECT phone rev.: 01
Frequency (Hz) dB relative to arbitrary level
Upper limit 100 -10
200 +2
4000 +2
8000 -15
Lower limit 300 -9
1000 -7
3400 -12
Table 4 - Co-ordinates of Receiving Sensitivity Limit Curves
C o -or d inate s of Rec eiv ing
S e n sitiv it y L imit C urve s
5
0
-5
zero
-10
-15
Sensitivity dB relative aebitrary
-20
100 1000 10000
Figure 3: Co-ordinates of Receiving Sensitivity Limit Curves
Frequency (Hz)
PAGE: 11 / 42
Giant Electronics ltd. Service manual for DECT phone rev.: 01
–
PRODUCTION LIMIT
FIX PART PORTABLE PART REMARK
OFF-LINE CID DATA TRANSMISSION (ETS 300 778-1)
Freq. and Baud Rate
Space Freq.
Mark Freq.
Baud Rate
Mark Level Detection Range -8 dBV ~ –36 dBV X
Space Level Detection range -8 dBV ~ –36 dBV
SNR Immunity @300~3400Hz 25 dB X
Transmission Prior to ringing
– TE Alerting Signals
DT-AS: Nom. Frequency
Signal Frequency
Twist
Duration
Unwanted Signal Immunity
(300 ∼ 3400 Hz)
RP-AS: Ringing Voltage
Nom. Frequency 25 Hz and/or 50 Hz X
Duration
Transmission During Ringing
First Ring Pattern
Ringing Voltage
Nom. Frequency 25 Hz and/or 50 Hz
Duration
Channel Seizure Detection
Length
Mark Signal Detection
Range
2100 ± 32 Hz
1300 ± 20 Hz
1200 ± 12 baud
2130 ± 11 Hz
2750 ± 14 Hz
-9 ∼ -40 dBV / tone
± 6 dBV
100 ± 10 ms
25 dB X
30 V ∼ 90 VRms
200 ∼ 450 ms
30 V ∼ 90 VRms
350 ∼ 1200 ms
96 ~ 300 bits X
180 ± 25 bits and / or
80 ± 25 bits
X
X
X
ETS 300778-1 4.2.1.1 &
4.2.3
X
X
X
X
X
X Extended
Recommendation
ETS 300778-1 4.2.1.2
X
ON-LINE CID DATA TRANSMISSION (ETS 300 778-2)
Freq. and Baud Rate
Space
Mark
Baud Rate
Mark Level Detection Range
Space Level Detection range
SNR Immunity @ Frequency
300 ∼ 3400 Hz
DT-AS Nom. Frequency
DT-AS Detection Level
DT-AS Detection Duration
DT-AS Twist
DTMF Acknowledge
TE-ACK)
Freq. Tolerance: 941 Hz 1.5% X
1163Hz 1.5% X
Tone Level: Low
Grp@20mA
Tone Level: High
Grp@20mA
Duration
Response Time
Mark Signal Detection
Length
2100 ± 32 Hz
1300 ± 20 Hz
1200 ± 12 baud
-10 ∼ -33 dBV
-10 ∼ -33 dBV
25 dB X
2130 ± 11 Hz
2750 ± 14 Hz
-10 ∼ -35 dBV / tone
80 ± 5 ms
± 6 dB
DTMF-D X
-8.5 ∼ -13 dBV
-6.5 ∼ -11.0 dBV
65 ms ∼ 90 ms
< 85 ms
80 bits ± 25 bits
X
X
X
X
X
X
X
XI-CTR 37
XI-CTR 37
X
X Between end of DT-AS
and start of TE-ACK
X
PAGE: 12 / 42
Giant Electronics ltd. Service manual for DECT phone rev.: 01
OPERATION MANUAL
1. Making External Calls
Charge the battery:
• Before you can use your new phone, you need to charge the battery.
• Put the supplied rechargeable batteries into the handset battery compartment and make sure
it is in the right polarity.
• Place the handset on the charge cradle of the base unit.
• The charge indicator
• The charge strength icon
• Charge the battery overnight for the first time.
To make a call:
on the base unit will light.
on the handset display will scroll.
• Press
• The base in-use indicator
• Dial the number you require.
To end a call:
• Press
Pre-dialing:
To make a call:
• Dial the number you require.
• To delete an incorrectly entered digit by pressing
• Press
• The phone will connect the line and dial the number you required.
To end a call:
• Press
To insert Pause for PBX system:
and wait for dialing tone.
will be turned on.
.
.
.
.
When you press and hold the digit, a Pause of 3 seconds will be added after the digit. A “P” will be
shown on the display.
2. Making Internal Calls
There should be more than one handset registered to a single base in order to make internal calls.
To make a call:
• Press
• Press the registered handset number you wish to dial.
.
PAGE: 13 / 42
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