DOWNLOAD Panasonic KX-TU301RUME Service Manual ↓ Size: 1.99 MB | Pages: 46 in PDF or view online for FREE

Model
KX-TU301RUME
Pages
46
Size
1.99 MB
Type
PDF
Document
Service Manual
Brand
Device
Telephone / EASY USE MOBILE PHONE
File
kx-tu301rume.pdf
Date

Panasonic KX-TU301RUME Service Manual ▷ View online

7
KX-TU301RUME
4 Technical Descriptions
4.1.
Block Diagram (Handset)
FLASH
IC2
32M bit
26MHz 
Crystal
X1
32KHz 
Crystal 
X2
TFT-LCD
(128 x160)
POW
Jack
Litium-ion
Battery
KeyPAD
Key
LED
LCD LED
SIM Card
GSM Module
MOD1
SRAM
IC3
1M bit
MIC
RECEIVER
SPEAKER
SPI
BACKLIGHT
KEY
SIM
16bit
16bit
VBAT
POWON  SW
PWON
Headset Jack
LED
Power IC (IC3)
W_LED_DRV
Tx Module
(PA+SW)
Rx
SAW
Matching
Matching
Antenna
Tx (900)
Tx (1800)
Rx(900)
Rx(1800)
PMB7880 (ULC2)
MIC
EPP
SP
HS_MIC
Torch
LED
Charger
Control
IC (IC2)
LDO
IC1
KeyLock  SW
KeyLock
Vibrator
LDO
IC4
VIB
Charger
Termina
AC Adapter
(PNLV226)
CHARGER
Thermistor
CF1
M0
Bell
LED
HS_SP
HS_DET
     (M2)
7   11
6
15
41
17    26
29    32
28
53
63
34
44
39,40
46,47
35,36,58,59
48,49
2    4,52
KX-TU301 BLOCK DIAGRAM (HANDSET)
8
KX-TU301RUME
4.2.
Circuit Operation (Handset)
4.2.1.
Outline
Handset consists of the following ICs as shown in Block Diagram (Handset) (P.7).
• GSM Module : MOD1
- GSM (GSM900/DCS1800) Network interface
- GSM Audio
Half Rate, Full Rate, Enhanced Full Rate (HR/FR/EFR), 
Adaptive Multi-rate (AMR), Echo cancellation, Noise reduction
- SIM card interface
4.2.2.
Power Supply Circuit
The power is supplied to the GSM module, Audio circuit, LCD, SIM card from Battery(+3.8v)as shown in Fig.101.The power
supply is as follows.
BAT+(3.8V) 
→ MOD1 → Audio circuit
BAT+(3.8V) 
→ MOD1 → LCD
BAT+(3.8V) 
→ MOD1 → SIM card
BAT+(3.8V) 
→ LED Power IC → LED
BAT+(3.8V) 
→ LDO → Vibrator
Fig.101
3.8V
VANA 2.5V
BAT+
GSM
 Audio circuit
module
BAT-
 MOD1
VIO 2.85V
   LCD
VSIM 2.85/1.80V
  SIM card
LED Power IC
IC3
LED
LDO
IC4
Vibrator
BAT
On
Off
VIO
2.85 V
Reset 
(RETn)
1
2
3
S
9
KX-TU301RUME
4.2.3.
Charge Circuit
Circuit Operation:
When charging with Charger, the charge current is as follows:
DC+(5.5V) 
→ F1(Charger)→ CHARGE+(Charger) → CHARGE+(Handset) → CN4 → L1 → Q1 → F2 → IC1 → IC2 →
BATTERY+... BATTERY- 
→ L2 → CN4 → CHARGE-(Handset)→ CHARGER-(Charger) → DC-(GND)
When charging without Charger, the charge current is as follows:
DC+(5.5V) 
→ JK1 → D1 → F2 → IC1 → IC2 → BATTERY+...
BATTERY-
→JK1→DC-(GND)
In this way, the BBIC on Handset detects the fact that the battery is charged.
The charge current is controlled by IC2 of Handset.
Refer to Fig.102 in Power Supply Circuit (P.8).
Fig.102
4.2.4.
Battery Low/Power Down Detector
Circuit Operation:
“Battery Low” and “Power Down” are detected by BBIC which check the voltage from battery.
The detected voltage is as follows;
• Battery Low
Battery voltage: V(Batt)   3.5 V ± 50 mV
The BBIC detects this level and "
" starts flashing.
• Power Down
Battery voltage: V(Batt)   3.3 V ± 50 mV
The BBIC detects this level and power down.
4.2.5.
GMS Module
• Establish and control the connection with GSM network
• SIM card interface
• Transmitter/Receiver
The voice signal input from MIC is coded and modulated to the GSM RF signal (GSM900 band: 880-915MHz/DCS1800
band:1710-1785MHz) in BBIC(IC1). GSM RF signal is amplified and radiated from antenna.
The GSM RF signal (GSM900 band: 925-960MHz/DCS1800 band: 1805-1880MHz) which is input from antenna is input to BBIC
(IC1) as shown in Block Diagram (Handset).
In IC1, the RF signal is demodulated.The voice data is decoded to analog audio and output through receiver or speaker.
• Keypad Interface
• Color display are supported
• Keypad and display backlight supported
• Speaker driver
• Receiver driver
• Headset driver
• Microphone input
• Charger circuitry for NiMH cells
4.2.6.
Speakerphone
The hands-free loudspeaker at SP+ and SP- is used to generate the ring alarm.
GND
GND
F1
GND
C8
1u
16
VMIC
GND
GND
GND
GND
GND
GND
GND
C9
10uF
GND
GND
GND
GND
GND
C10
0.1u
VIO
C1
22u
GND
Q1
G
D
S
GND
C11
22u
F2
C13
(   )
GND
CN4
1
2
GND
C69
33p
D8
GND
GND
TP-DCIN
GND
D1
TH
JK1
3
4
2
R10
10k
R4
100k
R6
470k
R1 3.6k
R2
7.5k
R3
82k
Q3
Q2
IC2
1 VCC
2 ROSC
3 LED
4 GND
5 VDD
6
TH
7
TMRCNT
8
RICHG
9
VSENSE
10
BAT
11
FIN
IC1
1
VO
2
NC1
3
GND
4
CS
5 CONT
6 NC2
7 NC3
8 VIN
9
FIN
L1
L2
D2
L3
CN5
1
2
3
CHARGE
Terminal
BATTERY
2.0A
)
10
KX-TU301RUME
4.3.
Circuit Operation (Charger Unit)
4.3.1.
Power Supply Circuit
The power supply is as shown.
TP1
TP2
J1
AC Adaptor
FUSE
F1
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