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TRC-70
DESCRIPTION OF COMPONENTS
CONTROL UNIT (X53-3280-21)
Conponent
Use/Function
Operation/Condition/Compatibility
Ci
5V AVR
Input 8V, output 5V.
IC2
Divided 1/3
5: Output 10.1MHz
— 10: Input 30.3MHz
IC3
A loop PLL IC
5: Ref. input 10.1MHz
= 7 : VCO locked voltage output.
8:"H*t when unlocked
11 : VCO input 40.72~70.62MHz.
ICA
VCO select decoder
Control data | __VCO switching
V1
V2
|VCO1/VCO2IVCO3/VCO4
L
L
ON | OFF | OFF | OFF
.
H
L
OFF {| ON | OFF | OFF
L
H
OFF | OFF}
ON | OFF
H
H
OFF | OFF | OFF}
ON
IC5
A loop MIXER
5 : Input 71.395~101.295MHz
= 11 : Input 30.675~30.695MHz
13 : Output 40.72~70.62MHz
IC6
B loop PLL IC
5: Ref. input 10.1MHz
7:VCO lock voltage output
8 : "H" when unlocked.
13 : VCO input 37,5~39.5MHz
1C7
Divided 1/100
4: Input 37.5~39.5MHz
8 : Output 375~395kHz
IC8
MIXER
1 : Output 30.675~30.695MHz
2: Input 30.3MHz
5: input 375~395kHz
IC9
C loop PLL IC
5: Ref.input 10.1MHz
7:VCO lock voltage output
8 : "H* when unlocked
11: VCO input 59.3~59.7MHz
d
IC10
Divided 1/100
4: Input 59.3~59.7MHz
8 : Output 593~597kHz
IC11
MIXER
1 : Output 10.693~10.697MHz
2: Input 10.1MHz
5: Input 5938~597kHz
1C300
\/O Expander
1C301
5V AVR
Input 13.6V (CB line), output 5V.
IC302
CPU
8bit microprocessor
1C303
Address latch
Latched an address signal for multiplex bus.
IC304
Address decoder
Chip select signal occur.
IC305
System reset
Watch a 13.8V voltage, reset signal occur to CPU.
IC306
System reset wave form
1C307
Inverter
Inverted reset signal.
IC308
OR gate
Make a logic that can not be memory writing when reset operation.
1C310
EPROM
Memoriezed program.
IC311
EEPROM
Keep to memory channel data.
IC312
Back-up signal wave form
Q1
Ref. buffer amplifier
30.3MHz.
Q2, 3
Ref. amplifier
30.3MHz.
Q4
Ref. buffer amplifier
10.1MHz.
Q5~7
A loop active filter
Qs
HET amplifier
71.395~101.295MHz.
ag
Buffer amplifier
71.395~101.295MHz.
Q10, 11
A loop PLL IF amplifier
40.72~70.62MHz.
Q12, 13
A loop B.P.F select switch
ON A loop operative to VCO3 or VCO4.
O14
A loop B.P.F select switch
ON A loop operative to VCO1 or VCO2.
Q15~17
B loop active filter
.
Q18
Buffer amplifier
30.3MHz.
:
Q19~21
Unlock switching
ON when unlocked.
Normaly OFF,
Q22~24
C loop active filter
.
Q25
Buffer amplifier
10.1MHz.
Q26
Carrier output switching
OFF when H3E received.
Q27
CAR amplifier
10.693~10.697MHz.
Q28
CAR output amplifier switching
ON when unlocked.
Q29
LED indicator switch
ON when unlocked.
Q300
Tuning start indication switch
ON when tuning start. Normaly OFF.
Q301
Tuning finished response switch
ON when tuning finished. Normaly OFF.
Q302
Tuning through indication switch
ON when tuning through. Normaly OFF.
28
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