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SPP-A972
4-1.
BLOCK DIAGRAM – MAIN Section –
CONF, INT COM,
SPK2, SPK1, L2, L1
A
(Page 27)
ANT1
(ANTENNA)
TX DATA
11
RX AUDIO
5
RF1
RF
UNIT
RSSI
6
PLL REF
10
PLL EN
2
SER DATA OUT
9
SER CLK
8
CS
SER CLK
(Page 27)
B
2
SK
SER DATA OUT
C
(Page 28)
3
DI
SER DATA IN
(Page 27)
D
4
DO
DTMF/CID SEL
E
(Page 27)
11
A
Z
4
Y
EX CID FSK
F
(Page 28)
15
X
14
CID DTMF DATA,
DTMF CLK
(Page 28)
G
DTMF O/P
(Page 28)
H
U1018
(MIC)
MCI
MCO
MIC
11
10
AMP
MUTE
12
MIC MUTE
DAOUT2
SPEAKER AMP
U1013
SP1
(SPEAKER)
8
VO2
VIN
2
5
VO1
CD
1
ASIC SPK MUTE
(Page 27)
J
TAD SPK SW
K
(Page 27)
05
SECTION 4
DIAGRAMS
68
TX DATA
AOP
83
67
DSIN
AIN
90
86
RINGER
P1.0
11
P1.1
12
79
ADIN2
64
PLLREF
P1.2
3
58
GPIO2/MON2
P1.3
14
ASIC
59
SIN
U1000 (1/2)
62
SOUT
P6.0
3
63
SCLK
55
GPIO5/TST1
P6.1
4
1
65
DAOUT2
80
ADIN1
EEPROM
U1011
89
FSK
56
GPIO4/TST0
P3.0
21
43
LINE1/2
SELECTOR
U1028
10
9
B
C
SELECTOR
Z0
L1 FSK
5
U1002
L2 FSK
11
10
9
Z1
3
A
B
C
Y0
Z0
2
5
Z
Y1
4
Z1
1
3
CID DTMF
X0
LINE COND1
Y0
12
2
DATA
Y
LINE COND2
15
X1
Y1
13
1
DTMF
CLK
X
14
X1
13
HTO+
TXO
TXI
HTI
5
TX
HYBRID
9
8
7
HTO–
ATTENUATOR
AMP
6
TLI2
TLI1
17
23
LEVEL
RLI2
RLI1
20
DETECTOR
26
VOICE SPEAKERPHONE
U1019
VLC
13
ATTENUATOR
CONTROL CIRCUIT
DIAL MODE
DETECTOR
RXO
RX
RXI
22
21
ATTENUATOR
17
TAD MIC +
TAD AUDIO OP
10
I-TAD
RX ON SWITCH
18
TAD SPK OUT
UNIT
TAD AUDIO IP
11
Q2001
(1/2)
4
TAD SPK MUTE
TAD AUDIO IP
12
– 25 –
LINE
SELECT
U1001 (1/4)
CONF
LINE
SELECT
U1004 (3/4)
AF AMP
L1
U1008 (4/4)
LINE
RING1
SELECT
RING2
U1004 (4/4)
SPK1
HOOK1
HOOK2
LINE
SELECT
U2001 (4/4)
AF AMP
U1010 (4/4)
LINE
SELECT
U2001 (1/4)
LINE
SELECT
U1004 (1/4)
SPK1
LINE COND1
LINE
SELECT
U1004 (2/4)
L1
LINE
SELECT
U1001 (3/4)
INT COM
LINE
SELECT
U1001 (2/4)
CONF
LINE
SELECT
U1006 (3/4)
L2
LINE
SELECT
U1006 (4/4)
SPK2
LINE
SELECT
U2001 (3/4)
AF AMP
U1009 (1/4)
LINE
SELECT
U2001 (2/4)
LINE
AF AMP
SELECT
U1007 (4/4)
U1006 (1/4)
SPK2
LINE
SELECT
U1006 (2/4)
L2
LINE
SELECT
U1001 (4/4)
INT COM
T1001
LINE
TRANSFORMER
TEL AMP
U1010 (1/4, 2/4)
HOOK
TEL AMP
ON/OFF
U1010 (3/4)
U1003
PARA DETECT
Q1006, 1008, U1022
LINE CONDITION
MONITOR
U1008 (1/4)
HOOK1
Q1007
RING1
U1008 (2/4, 3/4)
Q1010
RING2
U1007 (2/4, 3/4)
HOOK2
LINE CONDITION
LINE COND2
MONITOR
U1007 (1/4)
PARA DETECT
Q1019, 1022, U1023
T1000
LINE
TRANSFORMER
TEL AMP
U1009 (3/4, 4/4)
HOOK
TEL AMP
ON/OFF
U1009 (2/4)
U1016
D1014, 1016
D1017, 1021
• SIGNAL PATH
: RX
: TX
: RX (INTERCOM)
: TX (INTERCOM)
: BELL
– 26 –
1
2
J1003
L1/L1+L2
3
4
D1005, 1006,
D1018, 1020
RINGER
DETECT
RINGER
DETECT
1
J1011
2
L2
1
J1008
2
DATA
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