Table of Contents
Advertisement
SPP-205/206
5-1.
BLOCK DIAGRAM – HANDSET Section –
MIX, IF AMP, LIMITER AMP,
PLL, EXPANDER/COMPRESSOR
IC504
IC504 (1/2)
RX FREQUENCY:
43.72 – 46.97MHz
MIX1
IN1
B.P.F.
RF AMP
B.P.F.
39
FT502
Q501
L501
AT801
(ANTENNA)
L505
LO1
(RX VCO)
IN
14 BIT RX
40
VCO
COUNTER
LO1
RX
OUT
PHASE
41
DETECTOR
42
L.P.F.
L509
(TX VCO)
B.P.F.
TX AMP
TX VCO
FT504
Q504
Q505
46
20 21
05
S501
VOL
MIN
MID
MAX
SECTION 5
DIAGRAMS
MIX1
MIX2
MIX2
LIM
IF AMP/
OUT
FT503
OUT
FT501
IN
IN
37
34
35
32
LIMITER
AMP
1ST
2ND
MIX
MIX
4
D501
MODULATOR
TX OUT
TX
17
L.P.F.
SCRAMBLER
TX
TX
14 BIT
PD
L.P.F.
6
PHASE
TX
DETECTOR
COUNTER
TX VCO
8
X502
3.583MHz
48
47
6
5
COL1 – COL4
ROW1 – ROW5
34 – 31
18, 26, 25, 27, 44
KEY MATRIX
(SEET KEY)
– 21 –
L502
(DET)
27
IC504 (2/2)
RT501
RX
(RX)
AUDIO
DET
OUT
IN
RX
DETECTOR
25
24
L.P.F.
SCRAMBLER
DA
IN
22
DATA
RSSI
AMP
15
CD
OUT
13
CARRIER
DETECTOR
X501
10.24MHz
LO2 IN
1
2ND LOCAL
LO2 OUT
OSCILLATOR
2
ALC
C IN
LIMITER
TX
COMPRESSOR
19
20
AMP
MUTE
SERIAL
INTERFACE
9
11
10
D512
TALK/
BATT LOW
41 42 40
24
23
SYSTEM CONTROLLER
IC503
16
D601 – 604
LED DRIVE
(ILLUMINATION)
Q601
SPP-206
SCR
OUT
RX GAIN
RX
49
ADJUST
MUTE
E IN
48
E OUT
VOLUME
EXPANDER
46
CONTROL
SA
SPEAKER
IN
45
AMP
SPEAKER
MUTE
SA
OUT
44
AMP OUT
TX IN
MIC
MIC AMP
21
AMP
Q502
VCC
LOW BATTERY
BD1 OUT
14
REF1
DETECTOR
LOW BATTERY
BD2 OUT
VCC
16
DETECTOR
REF2
RINGER
RINGER
CONTROL
VOLUME
Q507
B+
17
35
38
2
30
39
22
B+
RX SYSTEM B+
TX SYSTEM B+
RESET
VOLTAGE
SWITCH
DETECT
Q516
IC502
– 22 –
• SIGNAL PATH
: RX
: TX
: BELL
SP801
(SPEAKER)
MC501
(MIC)
SP501
(RINGER)
Q508
37
36
+
CHARGE
TERMINAL
–
D502
D510
B+ SWITCH
(FOR RX SYSTEM)
Q509
B+ SWITCH
(FOR TX SYSTEM)
Q503
BT901
RECHARGEABLE
BATTERY PACK
B+
(BP-T16)
Advertisement
Table of Contents
