Icom IC-V85, Руководство по обслуживанию, Страница: 10 / 29

4 - 4
VCC SW5V
SW5V
74
45
“PS5C”
VCO5
T5V
R5V
LOGIC UNIT
RF UNIT
• POWER SUPPLY CIRCUITS
RF UNIT
PS5V
Logical circuits;
CPU (IC8),
Reset IC (IC21),
EEPROM (IC7), etc
VCO and BUFFER amp.;
VCO (Q76, D59−D61),
Buffers (Q5, Q74, Q75), etc.
COMMON;
PLL IC (IC19),
D/A converter, etc.
TRNSMITTER CIRCUITS;
Pre-driver (Q3), etc.
RECEIVER CIRCUITS;
IF IC (IC2), 1st mixer (Q13),
1st IF amp. (Q14), etc.
FOR POWER SAVE MODE;
APC amp. (IC26),
tone amp. (IC26), etc.
CPU
(IC8)
“R5C”
“T5C”
“PSVCO”
Q11 Q4, D6, D7
Q9, Q10, Q18, Q19
IC12
Q22
Q21
Q54
73 58 69
VCO5
Regulator
SW5V
Regulator
CPU5
Regulator
Charger
circuit
T5V
Regulator
R5V
Regulator
PS5V
Regulator
“PWRON”
From the
battery
From the
ext. DC power
Voltage line
Control signal
4-4 POWER SUPPLY CIRCUITS
DC voltage from the battery or external DC power supply is routed to whole circuit of the transciever via regulators.
4-5 CPU PORT ALLOCATION
Pin
No. Pin
Name
Description I/O
1 TONE Tone signals (DTMF/BEEP/1750Hz). OUT
2 CTCSS Tone signals (CTCSS/DTCSS). OUT
4 AFON
AF power amplifi er control signal.
"High"=While the AF poer amp. is activated.
OUT
5 RMUTE
AF line mute signal to the AF switch.
"Low"=While muting.
OUT
9 CSHIFT
Clock frequency shift control signal to the
clock oscillator.
OUT
10 RESET
CPU reset signal.
"Low"=CPU reset.
IN
16 PWRSW
[PWR] Key.
"Low"=When the key is pushed.
IN
17 NOIS "NOIS" signal. IN
18 DCC
Eexternal power supply connection detect.
"Low"=Powered by external DC.
IN
19 HOUT
Power supply detect.
"Low"=Powered by battery.
IN
20 PTT
Input signal from [PTT] key.
"High"=While the key is pushed.
IN
21−24 KR0−KR3
Input signal from Key pads.
"Low"=When the key is pushed.
IN
25 LEDC Backlight control signal to the LED driver. OUT
33 DISDA Serial data to the LCD driver.
IN
34 DISST Chip-enable signal to the LCD driver.
IN
35 DISCK Serial clock signal to the LCD driver. IN
36 DISEN Disable signal to the LCD driver.
IN
40 DICK
Pulse signal from [CONTROL DIAL].
IN
41 DIUD IN
42 MONISW
[MONI] key.
"Low"=When the key is pushed.
IN
45 PWRON Control signal to the power regulator. OUT
48−52 KS0−KS4
Input signal from Key pads.
"Low"=When the key is pushed.
OUT
53 MICS AF fi lter switching signal. OUT
54 MMUTE
MIC line mute signal to the AF switch.
"low"=While muting.
OUT
55 DADATA Data signal to the D/A converter.
OUT
56 DACK Clock signal to the D/A converter.
OUT
Pin
No. Pin
Name
Description I/O
57 DASTB Strobe signal to the D/A converter.
OUT
58 T5C
T5 line control signal to the T5 regulator.
"Low"=While transmitting.
OUT
59 TXC
Transmit mute signal to the TX switch.
"Low"=While TX muting.
OUT
61 UNLK
PLL unlock signal.
"Low"=PLL is unlocked.
IN
63 PLLSTB Strobe signal to the PLL IC. OUT
64 PLPS
PLL IC power save mode switching signal.
"Low"=While in power save mode.
OUT
65 PLLDATA Data signal to the PLL IC. OUT
66 PLLCK Clock signal to the PLL IC.
OUT
68 PLLSW
PLL loop fi lter characteristic toggle signal.
"High"=While the PLL is kicked-up.
OUT
69 PSVCO
VCO regulator control signal.
"Low"=While Vco is activated."
OUT
70 CHGIH
Charger circuit (High) control signal.
"High"=While charging.
OUT
71 CHGC
Charger circuit control signal.
"High"=While charging.
OUT
74 PS5C
Power save line control signal to the PS5V
regulator.
"Low"=While power save mode.
OUT
77 SI
External MIC key (A/D) input.
"High"=While the key is pushed.
IN
78 OPSD Data signal to the attached optional unit. OUT
79 ESCK Clock signal to the EEPROM. OUT
81 OPV1
Scramble unit detection signal.
"Low"=DTMF unit is attached.
IN
82 OPV2
Optional unit attachement detection signal.
"Low"=DTMF unit is attached.
IN
83 OPV3
DTMF unit detection signal.
"Low"=DTMF unit is attached.
IN
87 DCIN External power supply's voltage detection.
IN
88 LVIN Lock voltage.
IN
90 SD "SD" signal (RSSI signal). IN
91 VIN Remining battery voltage detection. IN
93 CTCIN DTCS and CTCSS signals.
IN
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