27
27
SPP-888
5-2. BLOCK DIAGRAM — BASE PHONE SECTION —
ANT1
TELESCOPIC
ANTENNA
BPF
FL2
1st
MIX
460kHz
CF2
RX
VCO
RX
PLL
LOCAL
OSC
QUAD
EXPANDER
REVERSE
CURRENT
PROTECTION
PH201
TEL LINE
CONTROL
Q120,121
2nd
MIX
RX
AMP
Q2
BPF
FL1
TX
AMP
Q1
1st
MIX
IN
1st
MIX
OUT
2nd
MIX
IN
2nd
MIX
OUT
CF1
10.68MHz
L4
RX VT
VCO2
VCO CONT
RX
OUT
LO1
LO2
TX IN
TX OUT
RSSI
D-COMP OUT
VCO1
X1
10.22MHz
RSSI
TX
PLL
+5V
+5V
FL4
IF
IN
AF
OUT
D-COMP
IN
34
32
27
28
1
47
22
43 44
42
46
3
4
40
38
36
MIX, IF AMP, DET
IC1 (1/3)
MUTE
PRE
AMP
RX
AMP
15
17
18
20
19
PRE
IN
RECE
IN
EXP
OUT
R02
R01
EXPANDER
IC1 (2/3)
TX OSC
Q4
42
43
TX IN
MICS
QR
GARX
AUXC
HFC
MIC+
MUTE
COMPRESSOR
LIMITER
DATA LATCH
CONTROL
MIC
IN
FIL
IN
COMP
OUT
FIL
OUT
9
6 7 8
5
10
11
COMPRESSOR
IC1 (3/3)
CLK
DATA
STB
SIG OUT
14
24
23
04
RSSI
Hi
RV1
L3
TX VT
RX DISCRI
+5V
TXAUX
RAUX
10
12
VBB
LSAO
14
16
SLPE
REG
17
18
IR
AGC
15 LN
VOLUME CONTROL
IC102
VOICE PROCESSOR
IC103
38
44
28
20
33
34
RECO
HFRX
GALS
35
41
40
39
37
DTMF 32
GATX
TXOUT
VOL
27
HFTX 36
23
26
1
11
31
30
AUXO
PD
MIC
MUTR
MUTT
MIC201
MIC
4
2
3
1
MUTE
SWITCH
Q111
LOCAL HANDSET
1
13
2
12
6
5
11
10
9
8
3
4
TEL LINE
DETECTOR
Q101
TEL LINE
SWITCH
Q105
SPEAKER
AMP MUTE
Q701
RING
SWITCH
Q104
RING
DETECTOR
PH101
RING
MUTE
PH102
DP
CONTROL
Q102
TEL PARA
DETECTOR
Q103,106
+5V
SP101
SPEAKER
LINE
FILTER
T101
1
8
RING CONTROL
IC101
D108
D709
D112
D104
D107
D106
D10
D105
D109
D115
D116
-1
-2
S101
(HOOK)
OFF
ON
SURGE
ABSORBER
VAR101
NOISE
FILTER
L101
J101
LINE
5
52 11
64
63
62
61
31
DTMF
HFC
36
35
34
33
VOL0
23
HOOK DET
CLK
DATA
PLL
STB
SIG IN
30
DP
39
SP AMP MUTE
22
RING DET
60
DIAL MODE
29
LINE DET
28
PARA DET
1
VOL1
VOL2
VOL3
BEEP ATT
BEEP
SP MUTE
AUXC
MUTT
MUTR
PD
4 3 2
9
37
EEDATA
6
EECLK
SDA
SCL
7
5 6
OSC1
13
OSC2
14
RSSI CTRL
21
RX DATA
8
TX DATA
10
RX MUTE
51
X301
4.048MHz
EEPROM
IC301
TX +B CTRL
TX +B
SWITCH
Q3
+5V
P
T
S301
DIAL MODE
KEY SWITCH
S501-523
45
ROW0
46
ROW1
47
ROW2
48
LOW3
41
COL0
42
COL1
43
COL2
44
COL3
49
LOW4
50
LOW5
-
+
DC IN 9V
J201
20
56
16
D501
POWER
D502
LINE
2
1
VOLTAGE
DETECTOR
IC201
REG +5V
Q201,202
HOLD
LINE LED
RESET
+5V
D203
D705
KEY LED
DRIVE
Q601
LCD BACK
LIGHT
D601-605
24
BACK LIGHT
LIQUID CRYSTAL
DISPLAY PANEL
LCD601
40
INH
25
LCD CE
26
LCD CL
27
LCD DI
41
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
42 43 44
INH
CE
CL
DI
P7
P8
S10
S11
P1
P2
P3
P4
P5
P6
S15
S16
S17
S19
S12
S13
S14
S22
S23
S24
S25
S26
S20
S21
31 32 33 34
COM1
COM2
COM3
COM4
32
LCD PICT
38
LCD PICT2
4
24
LCD DRIVE
IC601
SYSTEM CONTROL
IC302
Signal path
: RX (From TEL LINE)
: TX (To TEL LINE)
: BELL