28
28
SPP-888
5-3. BLOCK DIAGRAM — HANDSET SECTION —
BPF1
1st
MIX
CF2
460kHz
RX
VCO
RX
PLL
LOCAL
OSC
DET
EXPANDER
2nd
MIX
BPF101
RF AMP
Q101
KEY
ACTIVE
IC201,202
TX POWER
CONTROL
Q103
RESET
Q404
VOLTAGE
DET
IC404
1st
MIX IN
1st
MIX
OUT
2nd
MIX
IN
2nd
MIX
OUT
CF1
10.68MHz
L3
VCO2
VCO CONT
RX
OUT
LO1
LO2
TX IN
TX OUT
RSSI
D-COMP OUT
VCO1
X1
10.22MHz
RSSI
TX
PLL
BATT
ALARM
BAT
ALM
B+
L4
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)
VOLUME
CONTROL
Q1
TX VCO
Q102
INVERTER
Q405
27
46
47
20
18
26
2
23
22
21
24
8
12
28
EN1
WP
SCL
SDA
PUSH
48 EN2
SYSTEM RESET
17 CHARGE IN
25 TX+B CTRL
HOLD
RSSI H/L
RX DATA IN
BATT LOW IN
HICUT MUTE
TX DATA
CLK
DATA
STB
SIG STATE
VOL CTRL
64
MIC ON/OFF
5
OSC1
6
OSC2
53
LCD+B CTRL
1
44
43
42
OUT 0
OUT 1
OUT 2
OUT 3
OUT 4
41
45
BEEP ATT
3
RINGER
39
LIGHTS
40
TALK LED
CTRL
RV1
MUTE
COMPRESSOR
LIMITER
DATA LATCH
CONTROL
MIC
IN
MIC
OUT
FIL
IN
COMP
OUT
FIL
OUT
9
6 7 8
5
10
11
COMPRESSOR
IC1 (3/3)
CLK
DATA
STB
SIG OUT
14
SYSTEM CONTROL
IC401
(CHARGE)
CN2
D404
24
23
21
Signal path
: RX
: TX
04
X401
4.048MHz
POWER
CONTROL
Q301
REG
IC301
RINGER DRIVE
Q401,402
LED ON/OFF
Q302
B+
B+
LCD1
LIQUID CRYSTAL
DISPLAY PANEL
BZ401
KEY
EEPROM
51
50
49 RETURN 0
RETURN 1
RETURN 2
RETURN 3
52
KEY
KEY MATRIX
S202-221
Q403
B+
D202
S201
ROTARY
ENCODER
EEPROM
IC402
5
6
7
62
63
61
SDA
SCL
WP
B+
+BTX
D201
D406
D405
D403
(1/2)
D403
(2/2)
MIC401
MICROPHONE
SP1
SPEAKER
B+
D302-308
(BACK-LIGHT)
B+
D301
TALK
ANT2
TELESCOPIC
ANTENNA
RX VT
RECHARGEABLE
BATTERY
(BP-T16)
RSSI
Hi
L101
TX VT
RX DISCRI
13
( )
E,R/W,RS
DB4
DB7
54
60
