SPP-A2770
26
26
ANT201
(ANTENNA)
JOG1
(JOG DIAL)
EEPROM
IC122
COL1, COL2,
COL3 – COL5
ROW2 – ROW6
K2 – K5, K7 – K21,
S11, S16
LCD201
LIQUID
CRYSTAL
DISPLAY
PANEL
X121
6MHz
TX
MUTING
Q2
ATTENUATOR
Q3
MIC AMP
Q5
RX
MUTING
Q4
SP1
(SPEAKER)
MIC1
(MIC)
H
M
L
S1
VOL
BUZZER DRIVE
Q101
BZ101
BUZZER
D122 – 124
(LCD BACK LIGHT)
LED
DRIVE
Q121
D125 – 128
(KEY BACK LIGHT)
LED
DRIVE
Q122
RF UNIT
(RF61) B+
CLOCK GENERATOR
(IC3) B+
B+ SWITCH
Q61
B+ SWITCH
Q1
AF AMP
(IC2) B+
B+ SWITCH
Q6
WD
TIMER
C127,
R137
L1
SYSTEM CONTROLLER (IC121),
EEPROM (IC122) B+
CODEC
(IC1) B+
+
–
CHARGE
TERMINAL
RECHARGEABLE
BATTERY PACK
(BP-T38)
DC3.6V
900mAh
CHARGE
CURRENT
CONTROL
Q102
D102
CHARGE
CONTROL
Q7
CHARGE
DETECT
Q104
CHARGE DETECT
WAKE-UP
Q105
INTERMITTENT
SCAN TIMER
C126,
R136
CLOCK
GENERATOR
IC3
X31
10.368MHz
Ref No.
K2
K3
K4
K5
K7
K8
K9
K10
K11
K12
K13
K14
K15
K16
K17
K18
K19
K20
K21
S11
S16
PANEL DESIGNATION
CALL WAITING/FLASH
REDIAL/PAUSE
INTERCOM
PGM
EZ ACCESS
HOLD/PLAY
ERASE
1/REPEAT
.
4 GHI
7 PQRS
TONE
2 ABC
5 JKL
8 TUV
0 OPER
3 DEF/SKIP
>
6 MNO
9 WXYZ
#
TALK
OFF
8 ANT
13
RXAD PCM
15
PCMB CLK
14
PCM SYNC
12
TXAD PCM
17
POW DWN
18
RESET B
19
SPI EN
20
SPI CLK
22
SPI IN
23
SPI OUT
11
IRQ CAP
CODEC
IC1
15
20
PUSH
A
B
SDA
CS
SCL
LCD RS
RESET
SYSTEM CONTROLLER
IC121
RF61
RF UNIT
I
J1
•
SIGNAL PATH
: RX
: TX
: BELL
S2
PUSH ENTER
6-2.
BLOCK DIAGRAM – HANDSET Section –
Содержание SPP-A2770 - 2.4ghz Cordless Telephone
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