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5-1.
BLOCK DIAGRAM – BASE UNIT Section –
A1
RF UNIT
ANT
TX AUDIO
RX AUDIO
TX DATA
RX DATA
PLL DATA
PLL CLK
PLL EN
CAR DET
VOICE SPEAKERPHONE
U4
MIC101
TI
MIC
MIC
MICO
11
10
9
AMP
MIC
MUTE
TLI2
12
17
RLI2
20
SPEAKER AMP
U14
RECO
RX
3
OUTPUT1
INPUT+
1
22
ATTENUATOR
SP101
6
OUTPUT2
INPUT–
2
MUTE
7
SECTION 5
DIAGRAMS
TEL LINE
SWITCH
U13 (3/4)
+
9
8
TEL LINE
SWITCH
6
U13 (2/4)
4
3
5
HTO+
TO
5
TX
HTI
HYBRID
8
7
HTO–
ATTENUATOR
AMP
6
TLI1
23
LEVEL
RLI1
26
DETECTOR
VCI
ATTENUATOR
13
CONTROL CIRCUIT
SPEAKER ON/OFF
DIAL MODE
SWITCH
DETECTOR
U13 (1/4)
AF AMP
PD
FI
RI
FILTER
21
1
2
(FOR SPEAKER)
2
1
AMP
U2 (3/4)
13
LINE TRANSFORMER
AF AMP
BUFFER
(FOR TX)
Q1
U2 (1/4)
AF AMP
(FOR RX)
U2 (2/4)
FREQUENCY SHIFT
KEYING DEMODULATOR
U3
AF AMP
IN SE
9
(FOR DTMF)
U2 (4/4)
DTMF
16
IN P
10
OUT
IN N
11
IN DSP
13
IN DCN
14
M DAT
24
SCK
23
SD IN
22
SD OUT
21
INT
20
DCB RD
1
DC COMPA
2
4
5
14
57 58 59 60 61
X1
3.58MHz
64
TEL SWITCH
53 TX DATA
11
RX DATA
50
PLL DATA
49
PLL CLK
48
PLL EN
52
CAR DET
OFF
SW1
45
RI LO
LOW
RINGER
44
RI HI
HIGH
SYSTEM
CONTROLLER
KEY MATRIX
U7
KEY1 – 17,
KEY19 – 22
38 VOL1
D11
39 VOL2
D10
40 VOL3
D9
13
SP SW
1
MIC MUTE
43
RINGER
63
RO LO
D13
2
SPK MUTE
22
23
X2
8MHz
13
13
T2
D14
D16
D15
D7
HOOK ON/OFF
U8
KEY16
KEY17
HOLD
SPEAKERPHONE
KEY13
KEY 14
TONE
OPER 0
KEY10
KEY11
PQRS 7
TUV 8
KEY 7
KEY 8
GHI 4
JKL 5
KEY4
KEY5
1
ABC 2
OFF HOOK
25
EE DO
54
4
DO
EE DI
42
3
DI
EEPROM
EE CLK
41
2
CLK
U6
EE CS
55
1
CS
LED7
LINE LED
26
LINE
LED6
SPK LED
27
SPEAKERPHONE
LED8
INTCOM LED
28
INTERCOM
LED2
N MSG LED
29
NEW CALL
LED4
30
WAIT LED
VOICE MAIL
LED1
CHRG LED
31
CHARGE
RESET SIGNAL
RESET
21
GENERATOR
Q5, 6
CHARGE
CHARGE
PARK
9
DETECT
CONTROL
Q4
Q2, 8
FST CHG
10
+5V
B+
REGULATOR
(+5V)
U5
SPP-N1025/N1026
J7
LINE
• SIGNAL PATH
: TX
: RX
: BELL
KEY22
INTERCOM
KEY15
KEY21
#
CALL WAITING/
FLASH
KEY12
KEY20
WXYZ 9
REDIAL/
PAUSE
KEY 9
KEY2
MNO 6
PGM
KEY6
KEY1
DEF 3
SPEED DIAL
KEY3
KEY19
+
VOLUME
–
+
CHARGE
TERMINAL
–
J3
–
+
DC IN 9V
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