EFJohnson SMARTZONE 7780 - Manual (Page 103)

November 1999
Part No. 001-7780-500 8-3 TRANSCEIVER BLOCK DIAGRAM
Rx Freq
Minus
45.225 MHz
First
Mixer
Q2
FI2 FI3 Q2
IF Amp
DET
RSSI
D13/
D14
Wide/Narrow
Band
Switch
Wide/Narrow
Band
Switch
Ceramic
Bandpass
Filter
Ceramic
Bandpass
Filter
Ceramic
Bandpass
Filter
FI6 FI5
Bandpass
Filter
Noise
Detector Comparator
FI4 D15/
D16
RF Amp
Bandpas
Filter
Bandpass
Filter
45.225 MHz
Bandpass
Filter
W/N
IF BOARD RECEIVER
TRANSMITTER
SYNTHESIZER
PLL BOARD
RF UNIT
LOGIC UNIT
10-KEY OR 3-KEY
BOARD
DISPLAY
BOARD
SWITCH BOARD
ASSEMBLY
IC1 Q8 Q9 D7
Q5, Q6
Q7, D1,
D3, D11 FI7 L34,
D4
L13,
D5
Antenna Reverse
Power
Detector
Forward
Power
Detector
Low Pass
Filter
Antenna
Switch
Power
Control
Power
Amp Driver Predriver Tx/Rx Switch
16-Ohm
Speaker
SP1
SPE
IC306
Microcomputer
Microphone
MC1
W/N
RSSI
NOISE
RXDATA
SN RX
TXDATA
IC305,
Q3
RESET
XTAL
EXTAL
9.8304 MHz
X2
Q106,
Q107
Audio Amp
AMUT
LVCC
IC105,
IC106
Audio Amp
Audio Amp
IC104 EXT Terminal
(Accessory Connector)
DS6
LC Display
IC1
Display
Controller
Keyboard
PTT Sw PTTIN
PLLST
DTMF SO
DTMF CK
Mic Mute Gate
IC204B
IC303
DTMF
Encoder
IC304
16K x 8
EEPROM
MSCK, MSO,
MSI, DPO TST
Key S0-S3
Key R0-R3
QSEL 0-3
S1
Channel Sw
ULOCK
R117
Volume
Control
Mute
Gate
IC103
Expander
IC208
1/2
Bandpass
Filter
IC101
DC
Restoration
IC107
Data
Low Pass Filter
IC102
Q104
Data
Mute Gate
Q103
Bandwidth
Control
IC113A,
IC114
DC Restoration
IC112,
IC113B
Data
Low Pass Filter
Q108
Data
Mute Gate
Q201 BWC
Bandwidth
Control
IC206
A/B
Data
LP Filter
Test
Switch
IC203 IC210
Data Switch
Low Pass Filter
< 3 kHz
IC205 IC202B
Limiter
High Pass Filter
> 300 Hz
IC202A
FI1 Q1
Q18
X3 Multiplier
X3
14.925 MHz
TCXO
IC4
Driver
Amp
Ref Freq
Set
R73
Second Mixer/Detector
Q12
Buffer
IC1 Synthesizer Chip
Phase
Detector
Reference
Counter
fR
fV
6.25
kHz
6.25
kHz
Prescaler
Div By
128/129
N
Counter
A
Counter
Charge
Pump
Q1, Q2 IC3
VCO
Buffer
Q10, Q11
Q13
Lock
Detect
LD
PWR (Power Control)
LTR(Modulation Balance)
MOD (Modulation)
IC201
Combiner
Digital Pot
T5V
DTMF
Mute
IC204A
IC208
1/2
Compressor
+5S
IC403
+3V Regulator
IC2
IC1
RF 5V
Regulator
VCO V Reg
Q1
CP V Reg R13
Squelch
Level
Adjust
BWC
TXDATA
Smartnet
T/R Switch
IC110
T5V
Wide/Narrow Band Select
Noise
VCC
RECEIVE AUDIO PROCESSING
RECEIVE DATA PROCESSING
TRANSMIT DATA PROCESSING
TRANSMIT AUDIO PROCESSING
SMARTNET DATA PROCESSING
IC209
+5V
Audio
44.775 MHz Second Injection
450 kHz Second IF
SMARTNET
Data
Q406
+5S Regulator
Q405
T5V Regulator
Q404
R5V Regulator
R5V
T5V
+5V
+5L
VCC
+5V Regulator
IC402
L5V Regulator
IC401
R5C
T5C
S5C
Power Supplies
+5V Q403
Q402
LVCC Switch
VCC Switch
LVCC To
Audio Amps
7.5V
Battery
BAT
Power
On-Off Sw
BAT To PA IC1,
Pwr Ctrl Circuit
IC3