LG B1300 User manual

SERVICE MANUAL
SERVICE MANUAL
B1300

Table of Contents
Chapter 1 - Performance ……………………
Chapter 2 –Technical Brief ……………………
Chapter 3 –Failure List ……………………
Chapter 4 –Trouble Shooting ……………………
4
11
30
32
1-1. Performance …………………………………………..
1-2. HW Feature ……………………………………………
2-1. The RF Chipset ………………………………………
2-2. The PA Circuit ……………………………………….
2-3. Peripheral Circuit ……………………………………
2-4. Digital Baseband Chip ………………………………
2-5. Analog Baseband Chip ………………………………
2-6. CPU Memories ……………………………………….
2-7. Power Supplies ……………………………………….
2-8. Battery Charge Interface ………………………….
2-9. System Connector ………………………………….
2-10. Keypad Switches and Scanning …………………..
2-11. Display Interface …………………………………….
2-12. Microphone …………………………………………..
2-13. Receiver/Speaker/Buzzer …………………………
2-14. Headset Interface …………………………………..
2-15. Back-light Illumination ……………………………
2-16. Vibrator ………………………………………………
11
15
16
16
18
20
20
22
24
26
27
28
28
29
29
29
4-1. Power Supply …………………………………………
4-2. Software Download …………………………………
4-3. Voice Function ………………………………………
4-4. Display Function …………………………………….
32
33
34
35
4
10

Table of Contents
Chapter 5 –Test Point Data ……………………
Chapter 6 –Assembly Instructions ……………………
Chapter 7 –Block Diagram ……………………
Chapter 10 –Equipment List ……………………
Chapter 11 –Exploded View &
Replacement Part List
……………………
Chapter 12 –Repair Record Form ……………………
37
48
53
64
65
73
5-1. Component Side(1-1) ……………………………….
5-2. Component Side(1-2) ……………………………….
5-3. Keypad Side(2-1) …………………………………….
37
41
45
1. Remove Battery Cover …………………………………
2. Remove Battery ………………………………………….
3. Remove Screws …………………………………………
4. Turn Handset Up ………………………………………..
5. Take off Front Panel …………………………………..
6. Take off Keypad & Metal-Dome …………………….
7. Take off Mainboard …………………………………….
8. Take off Battery Connecter & MIC & Vibrator …..
9. Turn Mainboard Down …………………………………
10. Take off Antenna ……………………………………...
11. Take off Shielding Cover …………………………….
48
48
49
49
49
50
50
51
51
52
52
Chapter 8 –Circuit Diagram ……………………
Chapter 9 –Tooling List ……………………
55
61
1. RF Section ………………………………………………..
2. Baseband Section ……………………………………….
53
54

Chapter 1. Performance
Item Description Specification
1Frequency Band
EGSM900 band
Tx: 890 + n*0.2 MHz
Rx: 935 + n*0.2 MHz
(n = 0 ～ 124)
Tx: 890 + (n-1024)*0.2 MHz
Rx: 935 +(n-1024)*0.2 MHz
(n = 975 ～ 1023)
GSM1800 band
Tx: 1710 + (n-512)*0.2
Rx: 1805 + (n-512)*0.2
(n = 512 ～ 885)
2Phase error RMS < 5 degrees
Peak < 20 degrees
3Frequency error < 0.1ppm ~ =90 Hz (for GSM900)
or 180 Hz (for GSM1800)
4Power Level
GSM900
Control Level Power level Tolerance
5 33 dBm ±2dB
6 31 dBm ±3dB
7 29 dBm ±3dB
8 27 dBm ±3dB
9 25 dBm ±3dB
10 23 dBm ±3dB
11 21 dBm ±3dB
12 19 dBm ±3dB
13 17 dBm ±3dB
14 15 dBm ±3dB
15 13 dBm ±3dB
16 11 dBm ±5dB
17 9 dBm ±5dB
18 7 dBm ±5dB
19 5 dBm ±5dB
1-1 Performance
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Item Description Specification
4Power Level
GSM1800
Control Level Power Level Tolerance
0 30 dBm ±2dB
1 28 dBm ±3dB
2 26 dBm ±3dB
3 24 dBm ±3dB
4 22 dBm ±3dB
5 20 dBm ±3dB
6 18 dBm ±3dB
7 16 dBm ±3dB
8 14 dBm ±3dB
9 12 dBm ±4dB
10 10 dBm ±4dB
11 8 dBm ±4dB
12 6 dBm ±4dB
13 4 dBm ±4dB
14 2 dBm ±5dB
15 0 dBm ±5dB
5Spectrum due to
modulation
GSM900
Offset from Carrier
(KHz).
100
200
250
400
600 ~ <1200
1200 ~ <1800
1800 ~ <3000
3000 ~ <6000
≧6000
GSM1800
Offset from Carrier
(KHz).
100
200
250
400
600 ~ <1200
1200 ~ <1800
1800 ~ <3000
3000 ~ <6000
≧6000
Max.
dBc
+0.5
-30
-33
-60
-60
-60
-63
-65
-71
Max.
dBc
+0.5
-30
-33
-60
-60
-60
-65
-65
-73
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Item Description Specification
6Spectrum due to switching
transient
GSM900
Offset from Carrier
(KHz).
400
600
1200
1800
GSM1800
Offset from Carrier
(KHz).
400
600
1200
1800
Max.
dBm
-19
-21
-21
-24
Max.
dBm
-22
-24
-24
-27
7Spurious emissions Conduction, Emission Status, Appendix 1
Conduction, Emission Status, Appendix 2
8Bit Error Rate
GSM900
BER(Class II) <2.439% @-102dBm
DCS1800
BER(Class II) <2.439% @-102dBm
9Rx Level Report accuracy
GSM900 GSM1800
>= -88 >= -86 2 2
>= -101 >= -99 3 2
< -101 < -99 4 2
10 SLR 8 +/- 3 dB
11 Sending Response
Frequency(Hz) Max.(dB) Min.(dB)
100 -12
200 0
300 0 -12
1,000 0 -6
2,000 4 -6
3,000 4 -6
3,400 4 -9
4,000 0
12 RLR 2 +/- 3 dB
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Item Description Specification
13 Receiving Response
Frequency(Hz) Max.(dB) Min.(dB)
100 -12
200 0
300 2 -7
500 * -5
1,000 0 -5
3,000 2 -5
3,400 2 -10
4,000 2
* Mean that Adopt a straight line in
between 300Hz& 1,000Hz to be Max.
level in the range.
14 STMR 13 +/- 5 dB
15 Stability Margin > 6 dB
16 Distortion
dB to ARL (dB) Level Ratio (dB)
-35 17.5
-30 22.5
-20 30.7
-10 33.3
0 33.7
7 31.7
10 25.5
17 Side tone Distortion Three stage distortion < 10%
18 <Change>System frequency
(13MHz) tolerance ≦2.5ppm
19 <Change>32.768KHz
tolerance ≦30ppm
20 Power consumption
Full power: < 280mA (GSM) ;
< 220mA (DCS)
Standby : Normal : <=5mA
21 Talk time GSM/ Level_7
(Battery Capacity 720mA): 180Min
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Item Description Specification
22 Standby time
Under conditions, at least 150 hours:
1.Brand new and full 720mAh battery
2.Full charge, keep GSM in idle mode
3.Broadcast set off.
4.Signal strength=-82dBm,
DRX=9multiframes
5.Back light of phone set off, no press
keypad
23 Ringer Volume
At least 90dB under below conditions:
1. Ringer set as ringer 7.
2. Test distance set as 10 cm
24 Charge Voltage Fast Charge: < 720 Ma
Trickle Charge: < 35 mA
25 Antenna display
Level (RSSI)
0 RSSI<=-104
1 -103<=RSSI<= -98
2 -97 <=RSSI<= -92
3 -91 <=RSSI<= -86
4 -85 <=RSSI<= -76
5 -75 <=RSSI
26 Battery indicator
Level (RSSI)
0 3.300≦V≦3.504
1 3.504≦V≦3.570
2 3.570≦V≦3.686
3 3.686≦V≦3.935
4 3.935≦V
27 Low Voltage Warning 3.504V
28 Forced shut down Voltage 3.35V
29 Battery Type
1 Li-Ion battery
Standard Voltage = 3.7V
Battery full charge voltage =4.2V
Capacity: 720mAh (Li-Ion);
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Item Description Specification
30 Travel Charger
Linear Charger
In put: 110V or 220 VAC, 50/60Hz
Out put: 5VDC+/-0.25V, 500mA
(No Load)
Switching-mode charger
In put: 96- 246VAC, 50/60Hz
Out put: 5VDC+/-0.25V, 500mA
(No Load)
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1-2 HW Feature
Item Feature Comment
Battery Li-Ion Battery, 720mAh
AVG TCVR current (mA) GSM Imax(280mA),DCS Imax(220mA)
Stand by current (mA) <=5mA
- Talk time
- Stand by time
- Charging time
3-hour (GSM Tx Level_7)
TBD-hour(Paging Period:5 RSSI:-82dBm)
2-hour
RX sensitivity GSM:-107dBm, DCS:-105dBm
TX output power GSM (Level 5:32dBm),
DCS (Level0: 29.5dBm)
GPRS compatibility N/A
SIM card type 3v/5v small
Display 128x64
Status Indicator Soft Icons
Keypad 0-9, #, *, C, Phone Book,up/down,
On/Off Hook
ANT Internal
System connector Yes
Ear Phone Jack N/A
PC synchronization N/A
Memory 2MB
Speech coding EFR/FR/HR
Data & Fax N/A
Vibrator Yes
Melody 15 default + 5 user edit
Voice Recording N/A
C-Mike N/A
Receiver Yes
Speaker Phone Yes
Portable Handsfree Yes, option
Travel Adapter Yes Switching
Options
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