Icom IC-7200 Service Manual page 87

• CPU (LOGIC UNIT: IC1) (continued)
PIN LINE
No. NAME
PLL+MAIN system data (M62352GP×2, AD9951,
69 PDT
AD9833)
PLL+MAIN system clock (M62352GP×2, AD9951,
70 PCK
AD9833)
KS0–
71–75 Key matrix strobe output 0
KS4
Squelch signal (SQLS) output via the [ACC/MIC]
76 SQSS
terminal
77 RTKI Keying input for RTTY
78 MSNDS External SEND control (via MIC jack)
79 MNFL Manual notch volume input
80 DCVL Power voltage loading
81 DOTK DOT input (keying)
82 DASK DASH input (keying)
83 IPD Pre-driver current (sauce voltage) input
84 IDL Id (current) loading
85 SNDL SEND loading (from ACC socket)
86 ALML ALC meter
87 REFL REF voltage (SWR detection)
88 FORL FOR voltafe (SWR detection)
89 FANL PA UNIT temperature (thermo-sensor)
90 UDL MIC UP/DOWN input
91 PB2L [TWIN PBT] volume (outer)input
92 PB1L [TWIN PBT] volume (inner)input
93 RFGL [SQL/RF] gain volume input
95 AFGL [AF gain] volume input
96 VREF A/D conversion reference voltage (=VCC1)
98 LOST Strobe for shift register for 1st LO filter
99 MSNDL SEND signal from [MIC] jack.
100 DRFS DSP data frame(RX)
• SHIFT REGISTER (RF UNIT: IC141)
LINE NAME
B0S BPF/LPF (0.030000–1.599999 MHz) select
B1S BPF/LPF (1.600000–1.999999 MHz) select
B2S BPF/LPF (2.000000–3.999999 MHz) select
B3S BPF/LPF (4.000000–7.999999 MHz) select
B4S BPF/LPF (8.000000–10.999999 MHz) select
B5S BPF/LPF (11.000000–14.999999 MHz) select
B6S BPF/LPF (15.000000–21.999999 MHz) select
B7S BPF/LPF (22.000000–32.999999 MHz) select
• SHIFT REGISTER (RF UNIT: IC142)
LINE NAME
AMS AM mode select
B8WS RX BPF/LPF (33.000000 MHz and higher) select
B8S TX BPF/LPF (33.000000 MHz and higher) select
PROF PREAMP OFF
PRON PREAMP ON
ATTS Attenuator control
L3S LPF (5.000000–7.999999 MHz) select
L2S LPF (2.000000–4.999999 MHz) select
• SHIFT REGISTER (MAIN UNIT: IC2701)
LINE NAME
LOF0 1st LO filter (0.030000–14.999999 MHz) select
LOF1 1st LO filter (15.000000–29.999999 MHz) select
LOF2 1st LO filter (30.000000–44.999999 MHz) select
LOF3 1st LO filter (45.000000–54.000000 MHz) select
SIGNAL DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
I/O ACTIVE
O H data=1
O – data latch
O H H strobe subject of interrrupt
O H open (mute OFF)
I H H=SPACE (keying)
transmitting (except MIC
O H
SEND)=H
I – CCW=0 V, CW=5 V
I – power voltage 5V convert
I L down=1.55 V, up=2.5 V
I L down=1.55 V, up=2.5 V
In proportional
I –
(Voltage vs Current)
In proportional
I –
(Voltage vs Current)
I L Detect TX (less than 1.0 V)
I – 0 (min)–5 V (max)
I – 0 (min)–5 V (max)
I – 0 (min)–5 V (max)
I – 0 (min)–5 V (max)
I – 0–5 V
I – CCW=0 V, CW=5 V
I – CCW=0 V, CW=5 V
I – CCW=0 V, CW=5 V
I – CCW=0 V, CW=5 V
I –
O H
I L TX detect (less than 1.0 V)
O H
ACTIVE
H
H
H
H
H
H
H
H
ACTIVE
H
H
H
H
H
L
H
H
ACTIVE
H
H
H
H
3 - 6
PULL-UP/
PULL-DOWN
–
–
–
47 kΩ pull-
down
47 kΩ pull-up
47 kΩ pull-
down
–
–
47 kΩ pull-up
47 kΩ pull-up
–
–
–
–
–
–
–
–
–
–
–
–
– –
– –
–
– –