Icom IC-7700 User manual
S-14407XZ-C1
Feb. 2008
HF/50MHz TRANSCEIVER
This service manual describes the latest service information
for the IC-7700 HF/50MHz TRANSCEIVER at the time of
publication.
NEVER connect the transceiver to an AC outlet or to a DC
power supply that uses more than specifed. This will ruin
the transceiver.
DO NOT expose the transceiver to rain, snow or any liquids.
DO NOT reverse the polarities of the power supply when
connecting the transceiver.
DO NOT apply an RF signal of more than 20 dBm (100 mW) to
the antenna connector. This could damage the transceiver’s
front-end.
To upgrade quality, any electrical or mechanical parts and
internal circuits are subject to change without notice or
obligation.
MODEL VERSION
IC-7700
USA
EUR
FRA
ITR
ESP
UK
KOR
Be sure to include the following four points when ordering
replacement parts:
1. 10-digit Icom parts numbers
2. Component name
3. Equipment model name and unit name
4. Quantity required
<ORDER EXAMPLE>
1110003491 S.IC TA31136FNG IC-7700 MAIN UNIT 5 pieces
8820001210 Screw 2438 screw IC-7700 Top cover 10 pieces
Addresses are provided on the inside back cover for your
convenience.
Icom, Icom Inc. and logo are registered trademarks of Icom Incorporated (Japan) in the United States, the United
Kingdom, Germany, France, Spain, Russia and/or other countries.
ORDERING PARTS
1. Make sure the problem is internal before disassembling
the transceiver.
2. DO NOT open the transceiver until the transceiver is
disconnected from its power source.
3. DO NOT force any of the variable components. Turn
them slowly and smoothly.
4. DO NOT short any circuits or electronic parts. An
insulated tuning tool MUST be used for all adjustments.
5. DO NOT keep power ON for a long time when the
transceiver is defective.
6. DO NOT transmit power into a Standard Signal
Generator or a Sweep Generator.
7. ALWAYS connect a 50 dB to 60 dB attenuator between
the transceiver and a Deviation Meter or Spectrum
Analyzer when using such test equipment.
8. READ the instructions of test equipment throughly
before connecting a test equipment to the transceiver.
REPAIR NOTES
INTRODUCTION CAUTION
CONTENTS
SECTION 1 SPECIFICATIONS
SECTION 2 INSIDE VIEWS
SECTION 3 CIRCUIT DESCRIPITON
3-1 RECEIVER CIRCUITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3-2 TRANSMITTER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3-3 FREQUENCY SYNTHESIZER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3-4 MAIN CPU PORT ALLOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
SECTION 4 ADJUSTMENT PROCEDURES
4-1 PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4-2 ADJUSTMENTS ON THE OSC UNIT AND PLL UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
4-3 ADJUSTMENTS ON THE RF UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
4-4 ADJUSTMENTS ON THE PA200W BOARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
4-5 ADJUSTMENTS ON THE MAIN UNIT (including RF UNIT). . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
4-6 ADJUSTMENTS ON THE SCOPE UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
4-7 AUTOMATIC ADJUSTMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
SECTION 5 PARTS LIST
SECTION 6 MECHANICAL PARTS
SECTION 7 BOARD LAYOUTS
SECTION 8 GENERAL WIRING
SECTION 9 BLOCK DIAGRAM
SECTION 10 SCHEMATIC DIAGRAM
FRONT UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
LOGIC UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2
MAIN UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-8
PLL UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-12
OSC UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-13
ANT-SW UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-16
DIGISEL UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-16
RF UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17
NETWORK BOARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-22
CTRL BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23
FILTER UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-24
PA200W BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-25
SCOPE UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-26
DC-DC UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-29
1 - 1
SECTION 1 SPECIFICATIONS
D
General
• Frequency coverage (unit: MHz) :
Receiver 0.030000–60.000000*1
Transmitter 1.800000–1.999999*2, 3.500000–3.999999*2,
5.330500*3, 5.346500*3, 5.366500*3, 5.371500*3,
5.403500*3, 7.000000–7.300000*2,
10.100000–10.150000*2, 14.000000–14.350000*2,
18.068000–18.168000*2, 21.000000–21.450000*2,
24.890000–24.990000*2, 28.000000–29.700000*2,
50.000000–54.000000*2
*1Some frequency ranges are not guaranteed.
*2Depending on versions. *3USA version only.
• Operating mode : USB, LSB, CW, RTTY, PSK31, AM, FM
• Number of memory channels : 101 (99 regular, 2 scan edges)
• Antenna connector : SO-239×4 (antenna impedance: 50 1)
• Operating temperature range : 0˚C to +50˚C; +32˚F to +122˚F
• Frequency stability : Less than ±0.05 ppm (approx. 5 min. after from turn
the main power, [I/O], ON, 0–50˚C; 32–122˚F)
• Frequency resolution : 1Hz
• Power supply requirement : 85–265 V AC (universal input)
• Power consumption :
Receive Stand-by 200 VA typical
Max. audio 210 VA typical
Transmit at 200 W 800 VA
• Dimensions (projections not included) :425×149×437 mm; 1623⁄32×57⁄8×177⁄32 in
• Weight : Approx. 22.5 kg; 50 lb
• ACC 1 connectors : 8-pin DIN connector
• ACC 2 connectors : 7-pin DIN connector
• Display*:7-inch (diagonal) TFT color LCD (800×480)
• EXT-DISPLAY connector : D-sub 15S
• CI-V connector : 2-conductor 3.5 (d) mm (1⁄8w)
• RS-232C connector : D-sub 9-pin
• USB connector : USB (Universal Serial Bus)1.1/2.0×2
D
Transmitter
• Transmit output power :
SSB, CW, RTTY, PSK31, FM
5–200 W
AM 5–50 W
• Modulation system :
SSB D.P.S.N. modulation
AM Digital low power modulation
FM Digital phase modulation
• Spurious emission :
Harmonics More than 60 dB (HF bands)
More than 70 dB (50 MHz band)
Unwanted emission More than 50 dB (HF bands)
(except Harmonics) More than 66 dB (50 MHz band)
Out of band emission More than 40 dB (HF bands)
More than 60 dB (50 MHz band)
• Carrier suppression : More than 63 dB
• Unwanted side-band suppression : More than 80 dB
•
∂
TX variable range : ±9.999 kHz
• Microphone connector : 8-pin connector (600 1)
• ELEC-KEY connector : 3-conductor 6.35 (d) mm (1⁄4w)
• KEY connector : 3-conductor 6.35 (d) mm (1⁄4w)
• RELAY connector : Phono (RCA)
• ALC connector : Phono (RCA)
1 - 2
D
Receiver
•Receive system : Double conversion superheterodyne system
•Intermediate frequencies :
1st 64.455 MHz
2nd 36 kHz
•Sensitivity (typical) :
SSB, CW, RTTY (BW=2.4 kHz, 10 dB S/N)
0.100000– 1.799999 MHz 0.5 µV (pre-amp 1 ON)
1.800000–29.990000 MHz 0.16 µV (pre-amp 1 ON)
50.000000–54.000000 MHz 0.13 µV (pre-amp 2 ON)
AM (BW=6 kHz, 10 dB S/N)
0.100000– 1.799999 MHz 6.3 µV (pre-amp 1 ON)
1.800000–29.990000 MHz 2 µV (pre-amp 1 ON)
50.000000–54.000000 MHz 1 µV (pre-amp 2 ON)
FM (BW=15 kHz, 12 dB SINAD)
28.000000–29.990000 MHz 0.5 µV (pre-amp 1 ON)
50.000000–54.000000 MHz 0.32 µV (pre-amp 2 ON)
• Internal Modulate Distortion (typical) :Dynamic range 109 dB
(at 14.100 MHz, 100 kHz separation, pre-amp OFF,
CW mode; BW=500 Hz)
• Selectivity :
SSB, RTTY (BW=2.4 kHz) More than 2.4 kHz/–3 dB
Less than 3.6 kHz/–60 dB
CW (BW=500 Hz) More than 500 Hz/–3 dB
Less than 700 Hz/–60 dB
AM (BW=6 kHz) More than 6.0 kHz/–3 dB
Less than 15.0 kHz/–60 dB
FM (BW=15 kHz) More than 12.0 kHz/–6 dB
Less than 20.0 kHz/–60 dB
• Spurious and image rejection ratio : More than 70 dB
• Squelch sensitivity (pre-amp OFF) :
SSB, CW, RTTY, PSK31 Less than 5.6 µV
FM Less than 1 µV
• RIT variable range : ±9.999 kHz
• Audio output power : More than 2.6 W at 10% distortion with an 8 1load
• PHONES connector : 3-conductor 6.35 (d) mm (1⁄4w)
• EXT-SP connectors : 2-conductor 3.5 (d) mm (1⁄8w)/8 1
D
Antenna tuner
• Matching impedance range : 16.7 to 150 1unbalanced
(HF bands; VSWR better than 3:1)
20 to 125 1unbalanced
(50 MHz band; VSWR better than 2.5:1)
• Minimum operating input : 8W(HF bands)
15 W (50 MHz band)
• Tuning accuracy : VSWR 1.5:1 or less
• Insertion loss (after tuning) :Less than 1.0 dB
D
D
All stated specifications are typical and subject to change without notice or obligation.
2 - 1
SECTION 2 INSIDE VIEW
(viewing from the bottom)
RF UNIT
OSC UNIT
DIGISEL UNIT
(under the cover)
MAIN UNIT
PLL UNIT
SCOPE UNIT
3 - 1
SECTION 3 CIRCUIT DESCRIPTION
3-1 RECEIVER CIRCUITS
ANT-SW UNIT
Antenna switching relays (RL51, 61, 71, 81) select the RX
signals which are from [ANT1]–[ANT4], and the relays are
controlled by relay controller (IC11). RX signals from [ANT1]
–[ANT3] are applied to the CTRL BOARD, RX signals from
[ANT4] are applied to the RF UNIT directly.
CTRL BOARD
The CTRL BOARD has TX/RX switch which toggles the RF
path between in TX and RX.
RX signals from the ANT-SW UNIT are passed through the
TX/RX switches (RL252–254), and applied to the RF UNIT.
RF UNIT
RF UNIT contains receive circuits; from RX BPF to 2nd
RX IF AMP. The RX signals are filtered by BPFs to remove
unwanted signals and amplified, then down-converted twice
into 2nd IF signal.
The received signals from the ANT-SW UNIT and CTRL
BOARD are passed through some relays and attenuators,
then filtered by BPFs which is assigned to filter the RX
signals that desired to receive. The filtered RX signals are
amplified by RF AMPs before being applied to the 1st mixer.
• 0.03–30 MHz SIGNALS
The RX signals from the band SW (RL351) are passed
though one of the BPF or LPF. The filtered signals are
entered to the DIGISEL UNIT, and gone through or
by-passed the DIGISEL (Digital RF Selector Switch) filter.
When the DIGISEL function is activated, the RX signals
are passed through the DIGISEL SW (RL21) and narrow
bandwidth filter (D_SEL) which filters out unwanted signals
with its sharpen frequency response.The filtered signals are
amplified by the RF AMP (Q201) which recovers the insert
loss of the D_SEL filter, then backed to the RF UNIT via
DIGISEL SW (RL2).
The RX signals from the DIGISEL UNIT are applied to or
by-passed the Pre-AMP.
When the Pre-AMP1/2 is activated, the RX signals are
applied to the Pre-AMP1 (for all HF bands) or Pre-AMP2
(for 24 MHz and above) via P.AMP SW (RL1004), and the
amplified RX signals are applied to the 1st mixer (IC1051)
via the P.AMP SWs (RL1005, 1006) and LPF.
The RX signals are mixed with the 1st LO signals from
the PLL UNIT (1st LO signals are gone through LO AMPs
(Q1105, 1104, 1101) before being applied.) to be converted
into the 1st RX IF signal.
• 30–60 MHz SIGNALS
RX signals from the band SW (RL351) are passed though
one of the BPFs (Fc=50–54 MHz or Fc=54–60 MHz) to
remove unwanted signals.
The filtered signals are amplified by one of (or both of)
the Pre-AMPs (or by-passed; according to the setting).
The amplified RX signals are then applied to the 1st mixer
(Q1211, 1212) via the LPF.
The RX signals are mixed with the 1st LO signals from PLL
UNIT (the 1st LO signals are gone through LO AMP (Q1301),
HPF and LPF before being applied.) to be converted into
the 1st RX IF signal.
A portion of 1st IF signal is applied to the SCOPE UNIT via
buffer (Q1352).
The converted 1st RX IF signal is then filtered by one of 1st
IF filters on the MCF BOARDs (FI1401). Selecting of the
filter to pass is carried out by IF SW (IC1402, 1403). The
filtered 1st RX IF signal is amplified by two 1st IF AMPs
(Q1401–1403), then splitted into two before being applied
to the 2nd mixers; as a image rejection mixer (IC501,
1502). Each divided 1st RX IF signal is mixed with 2nd LO
signals from the PLL UNIT (gone through ATT, LO AMP
(Q1651), buffer (IC1651) and another buffer (IC1651)), to be
converted into the 36 kHz 2nd RX IF signal.
One of the LO signal is 90 degrees phase-shifted before
being applied to the 2nd mixer (IC1502), and the converted
2nd RX IF is 90 degrees phase-shifted too.
These converted 2nd RX IF signals are buffer-amplified
by buffer (IC1502/IC1501) and amplified by 2nd IF AMP
(IC1504/IC1503). Then the 2nd RX IF signals whose phase
is different each other are phase-shifted by the phase shifter
(IC1505), then composed by the composer (IC1505).
The composed 2nd RX IF signal is amplified by another 2nd
IF AMP (IC1506), then entered to the MAIN UNIT.
Signal Frequency Signal Frequency
1st RX IF 64.455 MHz 1st RX LO 64.485–124.455 MHz
2nd RX IF 36 kHz 2nd RX LO 64.491 MHz
1st TX IF 36 kHz 1st TX LO 64.485–124.455 MHz
2nd TX IF 455 kHz 2nd TX LO 64 MHz
3rd TX IF (*)
*; Refer to "SPECIFICATIONS."
• FREQUENCY CONFIGURATION
3 - 2
MAIN UNIT
MIAN UNIT contains receive circuits; from demodulator
to AF circuits. The 2nd IF signal is demodulated by digital
audio processing circuits.
• DEMODULATOR CIRCUIT
The 36 kHz 2nd RX IF signal from the MAIN UNIT is
applied to the Analog to Digital Converter (ADC; IC1251) via
the IF mute SW (IC1201) and unbalance-balance convert
circuit (IC1211, 1231), to be converted into the 24-bit serial
data. The serial data is applied to the DSP (IC1001) and
processed as digital audio signals. The processed digital
audio signals are then applied to the Digital Audio Converter
(DAC; IC1501) to be converted into the analog audio
signals; as recovered AF signals.
The recovered AF signals are applied to the RX AF circuits
via buffer (IC1751).
• RX AF CIRCUITS
The recovered AF signals are amplified and level-adjusted,
then output from the audio interfaces. (The destination of AF
output signals is depends on the setting)
<OUTPUT FROM Int./Ext. SPEAKER>
The recovered AF signals from the buffer (IC1751) are
passed through the SQL SW (Q351), and applied to the
AF AMP (IC331). The amplified AF signals are splitted into
two AF lines; one is bound for the headphones jack (J2) on
the FRONT UNIT, another is bound for the internal speaker
(SP1)/external speaker via the external SP jack (J751) on
the MAIN UNIT. Both of AF signals on each AF lines are
applied to the 2-channel Voltage Controlled Amplifier (VCA;
IC311) whose gain is determined by applied control voltage
to be adjusted its signal level.
The level-adjusted AF signals are applied to the AF power
AMP (IC281) which power-amplifies to obtain audio output
power, via LPF (Q291/301).
The power-amplified AF signals are passed through the AF
mute SW (RL261), then applied to the internal speaker (SP1)
via the external SP jack (J751), or an external speaker on
the MAIN UNIT.
When the headphones are connected to the headphones
jack (J2) on the FRONT UNIT, the power-amplified AF
signals from the AF power AMP (IC281) are applied to the
connected headphones.
<TO THE AUDIO STORAGE>
When recording received audio, recovered AF signals from
the buffer (IC1571) are also send to the audio storage
(IC203) on the LOGIC UNIT to be recorded.
<OUTPUT FROM ACC PORT>
The recovered AF signals from the buffer (IC1571) are
amplified by AF AMPs (IC241), the amplified AF signals
are applied to the VCA (IC231) to be adjusted its signal
level. The level-adjusted AF signals are output from [ACC1]
socket.
SCOPE UNIT
The 1st RX/TX IF signal from the buffer (Q1352) on the RF
UNIT are passed through the scope IF SW (IC31), scope
ATT, LPF and BPF (dual tuned), and amplified by scope
AMP (Q2) then applied to the 2nd scope mixer (D101).
The 1st IF signal is converted into the 45 MHz 2nd scope IF
signal (S2IF), and filtered to remove unwanted signals, then
amplified by the 2nd scope IF AMPs (Q201 and Q202).The
amplified 2nd scope IF signal is applied to the 3rd scope
mixer (D4) to be converted into the 200 kHz 3rd scope IF
signal.The converted signal is amplified by the 3rd scope IF
AMP (IC401), filtered by the active LPF (IC403), level-limited
by the saturation AMP (IC404). The level-limited signal is
applied to the ADC (IC501) which samples the 200 kHz 3rd
scope IF signal (0–2.5 V) into digital signal, then applied to
the DSP (IC601) as the serial data.
The DSP processes input data, then output to the CPU to
display the frequency and relative signal strength of RX
signals on the spectrum screen.
3 - 3
3-2 TRANSMITTER CIRCUITS
MAIN UNIT
The MAIN UNIT contains transmit circuits; from MIC AMP to
modulator cicuit.
• TX AF CIRCUITS
The audio signals from the microphone (MIC signals)
are amplified by MIC AMP (IC171) and level-adjusted by
VCA (IC171). The level-adjusted MIC signals are passed
through the MIC mute SW (IC201) and MIC line selector
(IC211) which selects the MIC line; MIC signals from the
microphone jack on the FRONT UNIT, or from [ACC1]
socket on the MAIN UNIT.
The MIC signals are then applied to the limiter AMP (IC221)
which limits the amplitude of MIC signals. The amplitude-
limited MIC signals are applied to the ADC (IC1251) via the
unbalance-balance convert circuit (IC1311, 1321, 1331),
to be converted into the 24-bit serial data. The serial data
is applied to the DSP (IC1001) and processed as digital
audio signals. The processed digital audio signals are then
applied to the Digital to Analog Converter (DAC; IC1501) to
be converted into the analog audio signals; as the 36 kHz
1st TX IF signal. The 1st TX IF signal is entered to the RF
UNIT.
RF UNIT
RF UNIT contains transmit circuits;TX mixers and AMPs.
The 36 kHz 1st TX IF signal from the MAIN UNIT is applied
to the 1st TX mixer (IC503) to be mixed with the 491 kHz
3rd LO signal from the PLL UNIT, to be converted into
the 455 kHz 2nd TX IF signal. The converted 2nd TX IF is
amplified by the 2nd IF AMP (Q501), filtered by 2nd TX IF
filter (FI1501 for BW=20 kHz or FI1502 for BW=4 kHz).The
filtered 2nd TX signal is amplified by 2nd IF AMP (Q504),
and applied to the 2nd TX mixer (D505) to be mixed with the
64 MHz 2nd LO signal from the PLL UNIT, to be converted
into the 64.455 MHz 3rd TX IF signal. The converted 3rd
TX IF signal is passed through the BPF (FI503), amplified
by 3rd IF AMP (Q506), and filtered by the LPF. The filtered
3rd TX IF signal is applied to the 3rd TX mixer (D506) to
be mixed with the 3rd LO signal from the PLL UNIT, to
be converted into the 4th TX IF signal (=TX signal). The
converted TX signal is filtered by the LPF, amplified by RF
AMP (Q508), passed through one of BPFs, then applied to
the YGR AMP (Q801).
The amplified TX signal is entered to the PA200W BOARD.
PA200W BOARD
•TX AMPLIFIERS
The TX signal from the RF UNIT is amplified by the RF AMP
(Q101), Pre-drive (Q201), drive (Q301) and power (Q401A,
B) amplifiers in sequence, to obtain TX output power. The
power-amplified TX signal is entered to the FILTER UNIT.
FILTER UNIT
• TX FILTERS
The power-amplified TX signal from the PA200W BOARD
is passed through one of BPFs (according to the TX
frequency) to remove unwanted signals including harmonic
components. The filtered TX signal is then entered to the
CTRL BOARD.
CTRL BOARD
The CTRL BOARD mainly contains circuits for parameter
detection of TX signal; Forward Wave, Reflected wave,
Reactance, Resistance, antenna current and voltage.
TX signal from the FILTER UNIT is passed through several
detection circuits in sequence, then applied to the antenna
[ANT1]–[ANT4].
• FOR (Forward Wave) voltage detection circuit
A portion of TX signal is rectified by current trans (L101) and
diode (D102), and the produced DC voltage is composed
by C103, C106 and C116 to detect FOR voltage (Forward
wave components). The detected voltage is amplified by
IC101 and applied to the A/D port of CPU (IC1).
• REF (Reflected Wave) voltage detection circuit
A portion of TX signal is rectified by current trans (L101) and
diode (D101), and the produced DC voltage is composed by
C102, C105, C115, C120 and C121 to detect REF voltage
(Reflected wave components). The detected voltage is
amplified by IC101 and applied to the A/D port of CPU (IC1).
• Reactance components detection circuit
A portion of TX signal which is detected by current trans
(L151) and TX signal which is divided by C153 and C158
are amplified by C-MOS IC. This AMP, as the first stage,
employs a C-MOS type AMP to detect the low TX signal.
The inverter AMP requires input level lower than others
need, and provides high speed operation for stable high
frequency operation with low TX signal.
The amplified signal is adjusted its waveform, then applied
to the IC155 and IC156 for phase comparison. The output
signal is rectified by D153 and D154, composed and
amplified by IC201, then applied to the A/D port of the CPU
(IC1).
• Resistance components detection
A portion of TX signal which is detected by current trans
(L201) and TX signal which is divided by C202, C205 and
C206 are adjusted so that two of these are the same on the
voltage. And two of these are rectified composed each other
to detect the resistance components. When the detected
voltage is increased, Q201 is activated to amplify the signal
for high detection sensitivity.
3 - 4
3-3 FREQUENCY SYNTHESIZER CIRCUITS
PLL UNIT
PLL UNIT provides LO signals; 1st LO for TX/RX IF circuits,
2nd RX LO (64.491 MHz), 2nd TX LO (64 MHz), 3rd TX LO
(491 kHz), marker frequency (100 kHz), reference frequency
for the SCOPE UNIT (40 MHz) and clock signal for the DSP
UNIT (12.888 MHz). These LO signals are generated by the
reference signal from the OSC UNIT as reference.
This transeiver employs the Direct Digital Synthesizer (DDS)
which digitally creates arbitrary waveforms and frequencies
from a fixed source frequency, to provide extremely high
resolution and stability frequency and pure waveform.
• Reference frequency signal
The 10 MHz reference frequency signal generated on
the OSC UNIT is applied to the 4th harmonic extractor
(Q702, L702, 703) via buffer (Q30) to produce the 40 MHz
reference signal.
• 1st LO signals
The 40 MHz reference signal from the harmonic extractor
is amplified by Q101, and applied to the DDS (IC101)
as the clock signal. The DDS generates the 10.4122038
–10.4963312 MHz sine waves, and these are passed
through the ceramic filter (FI101; Fc=10.7 MHz) to adjust
the waveform, then applied to the PLL IC (IC201) via buffer
(Q151).
The PLL IC (IC201) controls the oscillating frequency
of 6 VCOs (VCO1 to VCO6) using the reference signal
generated by the DDS as reference frequency.
The output signals of each VCOs (1st LO signals) are
buffer-amplified by Q301, passed through the HPF and
LPF, then amplified by the 1st LO AMPs (Q302 and Q351).
The amplified 1st LO signals are buffer-amplified by Q352,
passed through the LPF, HPF and ATT, then output to the
RF UNIT as 1st LO signals (64.485–124.455 MHz).
• 2nd LO signals
The 40 MHz reference signal from the harmonic extractor is
amplified by IC503, and applied to the DDS (IC501) as the
clock signal. The DDS generates the reference frequency
which controls the oscillating frequency of 64 MHz VCO
(Q541).
The output signal of 64 MHz VCO (Q541) is buffer-amplified
by Q561, and applied to the hybrid divider.
The hybrid divider divides the VCO output into two; 2nd TX
LO and 2nd RX LO.
<2nd TX LO signal>
The VCO output signal from the hybrid divider is passed
through the ATT, and applied to the 2nd LO AMP (Q591).
The amplified VCO output signal is passed through the BPF,
then entered to the RF UNIT as the 2nd TX LO signal.
<2nd RX LO signal>
The VCO output signal from the hybrid divider is passed
through the ATT, and applied to the 2nd LO AMP (Q801).
The amplified VCO output signal is passed through the ATT
and, applied to the 2nd LO mixer (D821) and mixed with
the 491 kHz 3rd TX LO signal from the 3rd TX LO oscillator
(IC651), to convert into the 64.491 MHz 2nd RX LO signal.
The converted 2nd RX LO signal is passed through the
ATT and BPF, and applied to the 2nd LO AMP (Q831). The
amplified signal is entered to the RF UNIT as the 2nd RX
LO signal.
• 3rdTX LO signal
The 40 MHz reference signal from the harmonic extractor
is amplified by IC652, and applied to the DDS (IC565) as
the clock signal. Using the clock signal, the DDS directly
generates the 491 kHz 3rd TX LO signal.
The output signal of DDS is passed through the LPF and
HPF, and applied to the buffer AMP (Q680). The buffer-
amplified 2rd TX LO signal is entered to the RF UNIT via
ATT.
• DSP system clock
The 40 MHz reference signal from the harmonic extractor
is amplified by IC1651, and applied to the DDS (IC1652)
as the clock signal. Using the clock signal, the DDS directly
generates 12.288 MHz system clock signal. The system
clock signal is passed through the LPF and HPF, and
applied to the buffer (Q1680). The buffer-amplified system
clock signal is entered to the MAIN UNIT via ATT.
• Scope clock
The 40 MHz reference signal from the harmonic extractor is
amplified by Q1601, and entered to the SCOPE UNIT.
VCO Oscillator
component Oscillating frequency
VCO1 Q220 64.485–72.454999 MHz
VCO2 Q230 72.455–79.454999 MHz
VCO3 Q240 79.455–86.454999 MHz
VCO4 Q250 86.455–94.454999 MHz
VCO5 Q260 94.455–109.454999 MHz
VCO6 Q270 109.455–124.455 MHz
3 - 5
3-4 MAIN CPU (IC604) PORT ALLOCATIONS
Pin
No. Description IN/
OUT Condtion
42 Clock signal to 4094/LMX2306 (PLL UNIT).
(DDS for 1st LO PLL-IC/DDS, 2ndTX LO DDS, 3rd TX LO) O
43 "Serial data to 4094/LMX2306 (PLL UNIT).
(DDS for 1st LO PLL-IC/DDS, 2ndTX LO DDS, 3rd TX LO) O
44 N/C O
45 Mode status (1Lo or T2Lo) output. O
46 Chip select siganl to PLL. I/O
47 Strobe to the PLL. O
51 Clock signal to units other than PLL and SCOPE. O
52 Serial data (other than PLL, SCOPE and DSP). O
53 N/C O
54 CI-V format data (UART). O
55 CI-V format data (UART). I
56 Clock to the DSP IC. O
57 Seral data (TXD/RXD) to the DSP. O
58 START signal to the TUNER UNIT (UART, 9600). O
142 Serial data to the DAC (BU9480) for ext.S-meter. O
140 Clock (A-clock) to the DAC (BU9480) for ext. S-meter. O
138 Clock (B-clock) to the DAC (BU9480) for ext. S-meter. O
137 Power line for liner circuit control signal. O "H"=Power ON
113 Forword wave detected voltage (A/D). I
114 Reflected wave detected voltage (A/D). I
115 ALC fedback voltage (A/D). I
116 Drain current (final amp.). I
117 Drain voltage (final amp.). I
118 PA UNIT temparature. I
119 Cooling fan motor current. I
120 Voltage from key pad (rear panel). I
133 Serial data to the FRONT CPU (UART, 38400). O
134 Serial data from the FRONT CPU (UART, 38400). I
135 CW/RTTY keying signal to the DSP. O "L"=Key pushed
81 Mute control signal. I "H"=Mute
82 TX power line control signal. O "L"=TX
83 Noise pulse. I
105 RX power line control signal. O "L"=RX
3 Serial communication with the scope DDS (AD9857) detect signal. O "H"=detected
33 Serial data to the SCOPE UNIT DDS/PLL/DSP. O
34 Strobe to the scope PLL (LMX2306). O
59 Chip selet signal to the scope DDS (AD9857). O "L"=AD9875 is slected
60 Profile (0/1) select signal to the scope DDS (AD9857). O "H"=Profile 1 is selected.
61 Clock signal to the DDS/PLL/DSP. O
121 DSP data (TXD/RXD). I
122 Hand shake signal from SCOPE DSP. I
123 Extra port for SCOPE DSP. I
124 Serial data from SCOPE DSP. I
125 N/C I
126 Through signal from the TUNER UNIT. I "H"=Through
127 Key input from the tUNER UNIT. I "H"=Tuner ON
128 Straight key input (A/D). I "L"=Key pushed
3 - 6
Pin
No. Description IN/
OUT Condtion
23 Clock to the EEPRROM (HN58X2464TI). O
24 Serial data from the EEPRROM (HN58X2464TI). I/O
26 Clock signal to the EEPROM (DIGISEL UNIT; CAT24WC256). O
27 Serial data from/to the EEPROM (DIGISEL UNIT;CAT24WC256). I/O
30 RTTY keying. I "H"="space" is marked
31 Transverter control signal from the [ACC] connector. I "L"=Transverter is
activated.
21 PLL unlock signal. I "L"=Unlocked
5–
20 Address bus lines. O
73–
71 Data bus lines. I/O
84 WAIT signal (bus line control). I "L"=Wait.
85 SEND signal. O "L"=TX
86 Dual Port SRAM intrude signal. I
87 "L" indicator control signal (bus control). O "L"= lights.
88 "H" indicator control signal (bus control). O "H"= lights.
89 READ data (bus contol). O
90 Address data (bus contol). O
94 PTT/ACC SEND input. I "H"=TX
107 Squelch signal to the [ACC] connector. O "H"=Squelch open (RX
LED lights)
109 Squelch signal. O "L"=Squelch open (Mute
OFF)
35 External SEND (lead relay) signal output. O "H"=Relay ON
36 External SEND (IC relay) signal output. O "H"=Relay ON
37 Chip select signal to the Dual Port SRAM. O "L"=SRAM is selected.
38 Chip select signal to the expander. O "L"= Expander is
selected.
3-4 MAIN CPU (IC604) PORT ALLOCATIONS (continued)
4 - 1
SECTION 4 ADJUSTMENT PROCEDURE
4-1 PREPARATION
¤ REQUIRED EQUIPMENTS
EQUIPMENT SPECIFICATION EQUIPMENT SPECIFICATION
Spectrum analyzer
Frequency range : At least 90 MHz
Bandwidth : 100 kHz or more Digital multimeter Input impedance : 50 kΩ/DC or more
Measuring range :Voltage: 0.1–10V
Current: 5A/30A
RF power
(terminated type)
Measuring range : 10–300 W
Frequency range : 1.8–100 MHz
Impedance : 50
Ω
SWR : Less than 1.2 : 1
Standard Signal
Generator (SSG)
Frequency range : 0.1–100 MHz
Output level : 0.1 µV to 32 mV
(–127 to –17 dBm)
Frequency Counter Frequency range : 0.1–100 MHz
Frequency accuracy :
±0.5 ppm or better
Input level : Less than 1 mW AC Millivoltmeter Measuring range :10 mV to 10 V
Modulation
Analyzer Frequency range : 30–300 MHz
Measuring range : 0 to ±10 kHz External Speaker Input impedance : 8 Ω
Capacity : More than 5 W
Audio Generator Frequency range : 300–3000 Hz
Output level : 1–500 mV Attenuator Power attenuation :50 or 60 dB
Capacity : More than 200 W
¤ EXPOSING UNITS
OSC UNIT cover
RF UNIT cover
Bottom cover
PLL/SCOPE UNITs cover
1) Remove 8 screws from the both sides.
2) Remove 7 screws from the bottom, then remove the
bottom cover.
3) Turn over the transceiver.
4) Remove 8 screws from the RF UNIT cover, 10 screws
from the PLL/SCOPE UNITs cover and 10 screws
from the OSC UNIT cover, then remove those covers.
CAUTION:The transceiver weighs approx. 22.5 kg (50 lb). Always have two people available to carry, lift or turn over the transceiver.
CAUTION!: BACK UP originally programmed contents (Memory channels, Common settings, etc.) in the transceiver before
starting adjustment.When all adjustments are completed, these contents in the transceiver will be cleared.
4 - 2
ALC
ADJ
ALCRELAY CW KEY
EXT
KEYPAD
METER
DC OUT
15V
MAX1A
REF I/O
10MHz
-
10dBm
INOUT
REMOTE RS
-
232C
EXT
-
DISPLAY
RX ANT
INOUT
S/P DIF
12
ACC
EXT
-
SP
ANT 1 ANT 2 ANT 3 ANT 4 GND
AC
15A
I
X
-
VERTER
OSC UNIT
RF UNIT
SCOPE UNIT
PLL UNIT
MAIN UNIT
<Bottom view>
<Rear view>
<Front view>
SSG
(for adjustments on the OSC UNIT)
SINAD METER
RF power meter
SSG
CAUTION !
DO NOT select an TX adjustment item while an SSG
is connected to the antenna connector.
Audio
generator
PTT
[MIC]
AC millvolt
meter
¤ UNITS LOCATION
¤ CONNECTIONS
4 - 3
4-2 ADJUSTMENTS ONTHE OSC UNIT AND PLL UNIT
ADJUSTMENT ADJUSTMENT CONDITION OPERATION ADJUSTMENT
POINT VALUE
REFERENCE
SIGNAL LEVEL 1 • Reference signal source :
External
• Receiving
1) Connect an Standard Signal
Generator to J1071 ([EXT-REF I/O]
terminal on the rear panel) and set
as;
Frequecy : 10.000 MHz
Level : –10.0 dBm
Modulation : None
2) Connect a Spectrum Analyzer to
J1072.
3) Adjust the REF signal level with
L1061 and L1062.
L1061, L1062
(OSC UNIT)
(repeatedly)
Maximum
level
REFERENCE
SIGNAL LEVEL
(40MHz)
1 • Receiving 1) Connect a Spectrum Analyzer to
CP701 (PLL UNIT).
2) Adjust the REF signal (40 MHz)
level with L702 and L703.
L702, L703
(PLL UNIT)
(repeatedly)
Maximum
level
HPL
LOCKVOLTAGE
(VCO1)
1 • Frequency : 7.999 MHz
• Mode : USB
• Receiving
1) Connect a Digital multimeter to CP2
"LV2" (PLL UNIT).
2) Adjust the lock voltage with C222.
C222
(PLL UNIT) 3.9–4.1 V
(VCO2) 2 • Frequency : 14.999 MHz
• Mode : USB
• Receiving
1) Connect a Digital multimeter to CP2
"LV2" (PLL UNIT).
2) Adjust the lock voltage with C232.
C232
(PLL UNIT) 3.9–4.1 V
(VCO3) 3 • Frequency : 21.999 MHz
• Mode : USB
• Receiving
1) Connect a Digital multimeter to CP2
"LV2" (PLL UNIT).
2) Adjust the lock voltage with C242.
C242
(PLL UNIT) 3.9–4.1 V
(VCO4) 4 • Frequency : 29.999 MHz
• Mode : USB
• Receiving
1) Connect a Digital multimeter to CP2
"LV2" (PLL UNIT).
2) Adjust the lock voltage with C252.
C252
(PLL UNIT) 3.9–4.1 V
(VCO5) 5• Frequency : 44.999 MHz
• Mode : USB
• Receiving
1) Connect a Digital multimeter to CP2
"LV2" (PLL UNIT).
2) Adjust the lock voltage with C262.
C262
(PLL UNIT) 3.9–4.1 V
(VCO6) 6 • Frequency : 60.000 MHz
• Mode : USB
• Receiving
1) Connect a Digital multimeter to CP2
"LV2" (PLL UNIT).
2) Adjust the lock voltage with C272.
C272
(PLL UNIT) 3.9–4.1 V
1st LO
OUTPUT LEVEL 1 • Frequency : 14.999 MHz
• Mode : USB
• Receiving
1) Connect a Spectrum Analyzer to
J351 "1LO" (PLL UNIT).
2) Adjust the output level with R357.
R357
(PLL UNIT) 2.35–2.85
dBm
2nd LO
LOCKVOLTAGE 1 • Frequency : 14.100 MHz
• Mode : USB
• Receiving
1) Connect a Digital multimeter to CP3
"LV3" (PLL UNIT).
2) Adjust the lock voltage with C546.
C546
(PLL UNIT) 1.7–2.3 V
RX 2nd LO
LEVEL 1 • Frequency : 14.100 MHz
• Mode : USB
• Receiving
1) Connect a Spectrum Analyzer to
J831 "R2LO" (PLL UNIT).
2) Adjust the output level with L801
and L834.
L801, L834
(PLL UNIT)
(repeatedly)
Max. level
(–20.0
dBm ±3.0
dB)
TX 2nd LO
LEVEL 1 • Frequency : 14.100 MHz
• Mode : USB
• Transmitting
1) Connect a Dummy Load to [ANT1].
2) Connect a Spectrum Analyzer to
J561 "T2LO" (PLL UNIT).
3) Adjust the output level with L565
and L566.
L565, L566
(PLL UNIT)
(repeatedly)
Max. level
(3.0 dBm
±3.0 dB)
C2
C14
C15
C16
C17
C18
C19
C20
C21
C22
C51
C52C53
C54
C61
C64
C101
C102
C103
C104
C105
C106
C107
C108
C109
C110
C111
C112
C113
C114
C115
C116
C117
C118
C119
C120
C121
C122
C123
C124
C128
C201
C202
C203
C204
C205
C206
C208
C209
C210
C212
C219
C220 C221
C222
C223
C224
C225
C226
C227
C228
C229
C230
C232
C233
C234
C235
C236
C237
C238
C239
C240 C241
C242
C243
C244
C245
C246
C247
C248
C250
C252
C253
C254
C255
C256
C257
C258
C259
C260
C262
C263
C264
C265
C266
C267
C268
C272
C273
C274
C275
C276
C277
C278
C283
C284
C285
C286
C287
C288
C289
C290
C291
C292
C293
C294
C296
C301
C302
C308
C309
C310
C311
C331
C332C333
C334
C335
C336
C337
C341
C342
C344
C351
C352
C353
C354
C355
C356 C357
C361
C441
C442
C443 C444
C445
C446
C447
C448
C449
C451
C452
C453
C501
C502
C503
C504 C506 C507
C509 C510 C511 C512 C513
C514
C515C516
C517C518C519
C520
C521
C525
C526
C532
C533
C534
C535
C540
C541
C542
C543
C545
C546
C547 C548
C549
C550
C551
C552
C553
C554
C558
C559
C565
C566
C580
C581
C593
C604
C605
C653
C654 C655 C657 C658
C659
C660
C661
C663 C664
C665
C666
C667
C668 C669 C670 C671 C672
C680
C681
C682
C683
C684C685
C686
C687
C688C689
C690
C691
C692
C703
C704
C705
C709
C710
C711
C712
C713
C801
C802
C803
C811 C812
C813
C831
C832
C834C835
C836
C837
C838
C1601
C1607
C1608
C1609
C1610
C1611
C1612
C1613
C1651
C1652
C1655 C1656
C1658
C1659 C1660
C1661
C1664C1665
C1666
C1667
C1668
C1669
C1670
C1671 C1672 C1673
C1680
C1681
C1682
C1683
C1684C1685
C1689
C1690
C1691
C1692
C1711
C1751
C1752
C1753
C1754
C1755
C1756
C1757
D201
D205
D220
D221
D222
D230
D231
D232
D240
D242
D250
D252
D261
D262
D263
D270
D271
D272
D341
D441
D501
D542
D821
EP10
EP11
EP12
EP13
EP20
EP21
EP22
EP1701
EP1702
EP1703
EP1704
EP1705
EP1706
EP1707
EP1708
EP1709
FI101
FI831
IC2
IC51
IC101
IC102
IC103IC104
IC201
IC501
IC503
IC602
IC651
IC652
IC1651
IC1652
IC1701
J31
J351
J561
J601
J681
J831
J1601
J1681
J2018
J2019
J2019
L2
L20
L30
L101
L102
L103
L123
L201
L220
L221
L222
L230
L231
L232
L240
L241
L242
L250
L251
L252
L260
L261
L262
L270
L271
L272
L280
L302
L331
L332
L341
L351
L441
L442
L451
L452
L501
L530 L531
L532
L541
L542
L543
L562
L565 L566
L681
L682
L683
L701
L702
L703
L801
L812
L821 L822
L831
L834
L1602
L1603
L1681
L1682
MP201
MP221
MP541
MP653
MP1651 MP1653
Q41
Q101
Q201
Q220Q230Q240Q250Q260Q270
Q280Q281Q282Q283Q284Q285
Q301
Q341
Q351
Q441
Q502
Q540
Q541
Q561
Q580
Q680
Q801
Q811
Q831
Q832
Q1601
Q1680
R3
R4
R5
R6
R10
R11
R13
R14
R15
R16
R17
R19
R51
R61
R101 R102 R103
R104
R105
R106
R107
R108
R109
R110
R111
R112
R113
R131R132
R133
R138
R201
R205
R206
R210
R220
R221
R222 R223
R224
R230
R231
R232 R233
R234
R240
R241
R242 R243
R244
R250
R251
R252 R253
R254
R260
R261
R262 R263
R264
R270
R271
R272
R273
R274
R301
R302
R303
R304
R305
R306R307
R341
R342
R343
R352
R353
R354
R355
R356
R357
R358
R359
R364
R365
R366
R441
R442
R443
R503
R504
R506
R509
R522
R534
R537
R540
R544
R545
R546
R548
R550
R554
R555
R556
R561
R563
R564
R565
R570
R571
R572
R573
R574 R575
R580
R581
R582
R603
R604
R655
R656
R657 R658
R659 R660
R661 R662
R663 R664
R665 R666
R667 R668
R669 R670
R671 R672
R673 R674
R675 R676
R677 R678
R679 R680
R685
R686 R687
R688
R689
R690
R691
R692
R693
R704
R708
R709
R710
R711
R712
R802
R803
R812
R814
R834R835
R839
R1602R1606
R1607
R1608
R1651
R1652
R1656R1657
R1658 R1659
R1660 R1661
R1662 R1663
R1664 R1665
R1666 R1667
R1668 R1669
R1670 R1671
R1672
R1673
R1674
R1675
R1676
R1677
R1678
R1679
R1680
R1685
R1686
R1687
R1688
R1689
R1690
R1691
R1692
R1693
R1694
R1705
R1706
R1707
MP101
B6724D
LV1
C222
TO LOGIC
MP651
MP501
10M
TO RF J1001
3
1Lo
R357
C232
C242
C252
C262
C272
MKR
T2Lo
TO OSC
C546
LV3
LV2
CP2
2
5
6
7
PLL
TO RF J502
SAD
TO SCOPE J3
TO DC-DC
J2018
CP701
CP3
176x113 t=1.6(2)
T3Lo
TO RF J501
R2Lo
4
DACK
DIP
8
1
TO RF J351
TO RF J1651
CP1
TOMAINJ801
9
BROWN
J1702
H0H5H10
H15
H20H25
H30H35
H40H45
H50
H55H60
H65H70
H75H80
H85
H90H95H100H105
H110H115
H120
H125H130
H135
H140
H145H150
H155
H160
H165
H170
H175
V0 V5 V10 V15 V20 V25 V30 V35 V40 V45 V50 V55 V60 V65 V70 V75 V80 V85 V90 V95 V100 V105 V110
C1004
C1005
C1006
C1007
C1008
C1010
C1011
C1012
C1013
C1014
C1015
C1016
C1017
C1018
C1019
C1020
C1021
C1022
C1023
C1024
C1025
C1026
C1027
C1028
C1030
C1031
C1032
C1033
C1042
C1043
C1044
C1045
C1046
C1047
C1048
C1050
C1051
C1052
C1053
C1062
C1063
C1064
C1066
C1067
C1069
C1070
C1071
C1072
C1073
C1074
C1075
C1077
C1091
C1092
C1093
C1094
C1101
C2016
C2017
C6110
D1010
D1011
D1071 D1072
EP1010
EP1069
EP1070
EP1091
EP1092
IC10
IC1091
IC1092
J1071
J1072
J2016
J2017
L1020
L1021
L1022
L1023
L1024
L1041
L1042 L1043
L1044
L1061
L1062
Q1010
Q1011
Q1012Q1013
Q1021
Q1022
Q1023
Q1042
Q1043
Q1061
Q1062
Q1070
Q1101
R1011
R1012
R1013
R1020
R1021
R1022
R1023
R1024
R1025
R1026
R1027
R1028
R1043
R1044
R1045
R1046
R1047
R1061
R1062
R1063
R1064
R1065
R1067
R1068
R1071
R1072
R1073
R1074
R1075
R1077
R1078
R1079
R1080
R1091
R1092
R1093
R1094
R1095
R1096
R1097
R1098
R1099
R1100
R1101
R1102
R2016
R2017
R2018
RL1010
RL1011
X10
B6734B
J2016
N
R
H0H5H10H15H20H25H30H35H40H45H50H55H60H65H70
V0 V5 V10 V15 V20 V25 V30 V35 V40
• PLL UNIT
(TOP VIEW) • OSC UNIT
(TOP VIEW)
L1061
L1061
L1062
L1062
J1072
J1072
J1071
J1071
From SG
From SG
To RF voltmeter
To RF voltmeter
CP2
CP2
HPL lock voltage check
HPL lock voltage check
C232
C232
(VCO2)
(VCO2)
C222
C222
(VCO1)
(VCO1)
R357
R357
1st LO level adjustment
1st LO level adjustment
4 - 4
L703
L703
Reference signal level (40MHz) adjustment
Reference signal level (40MHz) adjustment
L702
L702
CP701
CP701
C272
C272
HPL lock voltage adjustment
HPL lock voltage adjustment
(VCO6)
(VCO6)
C262
C262
(VCO5)
(VCO5)
C252
C252
(VCO4)
(VCO4)
C242
C242
(VCO3)
(VCO3)
J351
J351
C546
C546
2nd LO lock voltage adjust
2nd LO lock voltage adjust
CP3
CP3
L834
L834
L801
L801
L565
L565
L566
L566
TX 2nd LO level
TX 2nd LO level
adjustment
adjustment
J831
J831
J561
J561
RX 2nd LO level
RX 2nd LO level
adjustment
adjustment
- ADJUSTMENT AND CHECK POINTS -
• PLL UNIT (TOP VIEW)
4 - 5
4-3 ADJUSTMENTS ONTHE RF UNIT
ADJUSTMENT ADJUSTMENT CONDITION OPERATION ADJUSTMENT
POINT VALUE
PRERARATION
(Preset) 1 • Frequency : 14.150 MHz
• Mode : USB
• ANTENNA : [ANT1]
• [P.AMP1] : "ON"
• Receiving
• Connect a Digital multimeter to
CP1102" (RF UNIT). R1101
(RF UNIT) 4.4–4.6 V
2•Connect a Digital multimeter to
CP1103" (RF UNIT). R1132
(RF UNIT) 4.4–4.6 V
3•Set R1228 (RF UNIT) to center
position. R1228
(RF UNIT)
Center
position
(MCF-M) 4•Set the L1401 and L1402 as below. L1401, L1402
(MCF-M BOARD)
–
(MCF-W) 5•Set the L1401 and L1402 as below.
L1401, L1402
(MCF-W BOARD) –
(MCF-N) 6•Set the L1401 and L1402 as below.
L1401, L1402
(MCF-N BOARD) –
RECEIVE
SENSITIVITY
(HF BAND)
1 • Frequency : 14.150 MHz
• Mode : USB
• ANTENNA : [ANT1]
• Receiving
1) Connect an SSG to the [ANT1] and
set as;
Frequecy : 14.1515 MHz
Level : 0 dBµ
Modulation : None
2) Connect an AC Millivoltmeter to the
[EXP-SP].
3) Adjust the sensitivity with L1408
and L1058.
L1408, L1058
(repeatedly)
(RF UNIT)
Max. audio
output leve
l
IMAGE
RESPONSE 1 • Frequency : 14.150 MHz
• Mode : USB
• ANTENNA : [ANT1]
• Receiving
1) Connect an SSG to the [ANT1] and
set as;
Frequecy : 14.0765 MHz
Level : +94 dBµ
Modulation : None
2) Connect an AC Millivoltmeter to the
[EXP-SP].
3) Adjust the sensitivity with R1516
and C1656.
R1516, C1656
(RF UNIT)
Min. audio
output leve
l
RECEIVE
SENSITIVITY
(50 MHz BAND)
1 • Frequency : 50.0200 MHz
• Mode : USB
• ANTENNA : [ANT1]
• [PREAMP2] : "ON"
• Receiving
1) Connect an SSG to the [ANT1] and
set as;
Frequecy : 50.0215 MHz
Level : –10 dBµ
Modulation : None
2) Connect an AC Millivoltmeter to the
[EXP-SP].
3) Adjust the sensitivity with L1222.
L1222
(RF UNIT)
Max. audio
output leve
l
IFTHROUGH
(50 MHz) 1 • Frequency : 50.0200 MHz
• Mode : USB
• Receiving
1) Connect an SSG to the [ANT1] and
set as;
Frequecy : 64.455 MHz
Level : +94 dBµ
Modulation : None
2) Monitoring the S-METER on the
display, adjust the swing width with
C1265.
C1265
(RF UNIT)
Min.
swing
width
3 rotation
s
Core
3.5 rotations
Core
4.5 rotations
Core
Center position
C7
C8
C9
C10
C11
C272
C276
C283
C285
C286
C287
C297
C302
C303
C304
C397
C398
C399
C501
C502
C503
C505
C506
C507
C508
C509
C510
C511
C512
C513
C514
C515
C517
C518
C519
C520
C521
C522
C523
C524
C525
C526
C527
C528
C539
C540
C564
C565
C566
C567
C568
C569
C574
C576
C577
C589
C590
C681
C682 C683
C684
C685
C686
C687
C688
C689
C690
C691
C692
C693
C694
C695 C696
C697
C698
C699
C700
C701
C702
C703
C704
C705
C706
C707
C708
C709
C710
C711 C712
C713
C714
C715
C716
C717
C718
C719
C720
C721
C722
C723
C724
C725
C726
C727 C728
C729
C730
C731
C732
C733
C734
C735
C736
C737
C738
C739
C740
C741
C742
C743 C744
C745
C747
C749
C750
C751
C755
C756
C758
C759
C760
C761
C801
C802
C804
C807
C813
C814
C816
C910C914
C1001
C1011
C1013
C1014
C1032
C1034
C1037
C1038
C1041
C1053
C1054
C1055
C1056
C1057
C1061
C1062
C1064
C1066
C1067
C1070
C1071
C1072
C1073
C1074
C1083
C1084
C1085
C1091 C1092
C1093
C1101
C1102
C1103
C1104
C1106
C1109
C1110
C1111
C1112
C1113
C1115
C1116
C1117
C1118
021
1C
9
1
11C
C1121
C1122
C1123
C1124
C1125
C1126
C1153
C1201
C1202
C1214
C1215
0
42
1C
6
32
1C
C1241
C1244C1245
C1246
C1247
C1248C1249
C1250
C1251
C1252
C1256
C1265
C1266
C1268
C1302
C1303
C1304 C1305
C1306
C1307
C1308
C1309
C1310
C1312
C1313
C1314
C1357
C1360
C1403
C1405
C1406C1407
C1418
C1420
C1421
C1423
C1428
C1429
C1431
C1433
C1441
C1501
C1502
C1503
C1504
C1505
C1506
C1507
C1508
C1509
C1510
C1511
C1512 C1513
C1514 C1515
C1516
C1517
C1518
C1519
C1520
C1521
C1522
C1523
C1524
C1525
C1526 C1527
C1528 C1529
C1530
C1531
C1534
C1535
C1536
C1537
C1538
C1539
C1540
C1541
C1655
C1656
8561C7561C
C1659
C1662
C1663
C1703
C1704C1705
C1706
C1717
C1718
C1720
C1721
C1722
C1723
C1724
2091C1091C
4091C3091C
C2004
C2006
C2007
C2009
C2010
C2012
C2013
C2015
C2016
C2017
C2018
C2019
C2020
C2021
C2022
C2023
D260 D262
D505
D506
D611 D612
D613
D614
D615 D616
D617 D618
D619 D620
D801
D802
D1001
20
1
1D1011
D
D1201
D2001
D2002
EP1091
EP1092
EP1093
EP1505
EP1802
EP1810 EP1811
EP1813
EP1814
EP1815
EP1816
EP1831
EP1832
EP1833
EP1835
EP1837
EP1901
EP2002
EP2004
EP2005
EP2006
EP2007
EP2008
EP2009 EP2010
EP2011
EP2012
EP2013
EP2014
EP2015
EP2016
EP2017
EP2018
2002F1002F
FI501
FI502
FI503
201CI101CI
IC501
IC502
IC503
IC1051
IC1081
IC1402
IC1403
2051CI1051CI
4051CI3051CI
IC1505
IC1506
IC1651
IC1652
IC1701
IC1702
IC1703
IC1704
2091CI1091CI
IC1903
IC1904
J101
J102
J103
J104
J105
J106
J108
J351
J352
J391
J501
J502
J503
J801
J808
J810
J1001
J1101
J1301
J1401
J1402
J1403
J1404
J1405
J1406
J1501
J1651
J2001
J2002J2003
J2004
J2006
J2007
J2007
L3
L4
6L5L
L23
L24
L25
L26
L27
L53
L54
L55
L56
L57
L83
L84
L85
L86
L87
L113
L114
L115
L116
L117
L143
L144
L145
L146
L147
L173
L174
L175
L176
L177
L203
L204
L205
L206
L207
L233
L234
L235
L236
L237
L260
L263
L264
L265
L266
L267
L268
L291
L292
L293
L294
L295
L296
L320
L326
L504
L505
L507
L508
L509
L510
L512
L513
L514
L518
L519
L521
L522
L527
L626
L627
L628
L629
L630
L631
L632
L633
L634
L635
L636
L637
L638
L639
L640
L641
L642
L643
L644
L645
L646
L647
L648
L649
L650
L651
L801
L803
L905
L1004
L1005
L1006
L1007
L1008
L1009
L1010
L1011
L1012
L1013
L1015
L1052
L1053
L1054
L1055
L1056
L1058
L1060
L1062
L1063
L1071
L1072
L1101
L1102
L1103
L1104
L1105
L1151
L1201
L1208
L1210
L1211
L1213
L1214
L1216
L1217
L1218
L1219
L1220
L1222
L1223
L1228
L1301
L1302
L1303
L1304
L1305
L1307
L1353
L1405 L1406
L1407
L1408
L1501
L1652
L1902
MP502 MP511
MP1058
MP1101 MP1301
MP1408
Q260
Q501
Q503
Q509
Q804
Q805
Q901
Q1005
Q1101
Q1102
Q1104
Q1105
Q1205
Q1211
Q1212
Q1301
Q1402
Q1403
2051Q1051Q
Q1701
Q1702 Q1703
R1
R3
R101
R102
R103
R104
R105
R106
R107
R108
R117
R118
R119
R120
R121
R122
R123
R133
R134
R135
R260
R261
R262
R263
R264
R320
R322
R388
R405
R501
R502
R503
R504
R505
R506
R507
R508
R509
R510
R516
R517
R518
R519
R523
R524
R525
R526
R527
R534
R537
R538
R562
R575
R576
R577
R578
R579
R580
R585
R606
R607
R608
R609
R610
R611
R612
R613
R614
R801
R810
R811
R812
R813
R814
R815
R816
R817
R819
R820
R821
R1002
R1006
R1008
R1018
R1019
R1024
R1054
R1055
R1056
R1071
R1072
R1073
R1101
R1103
R1104
R1105
R1107
R1111
R1113
R1114
R1116
R1117
R1118
R1119
R1121
R1122
R1123
R1124
R1126
R1127
9211
R
8
2
11R
R1130
R1132
R1133
R1134
R1135
R1151
R1203
R1208
R1209
R1210
R1211
R1226
R1227
R1228
R1232
R1302
R1304
R1307
R1314
R1315
R1316
R1360
R1402
R1408
R1409
R1411
R1412
R1413
R1415
R1501
R1502
R1503
R1504
R1506
R1507
R1508
R1509 R1510
R1511
41
51
R3
15
1R2
151
R
R1515
R1516
R1517
R1518
R1519
R1520
R1521
R1522
R1523
R1524
R1525
R1527
R1528
R1529
1351R0351R
R1532
R1533
R1534
R1535
R1536
R1539
R1540
R1541 R1543
R1544
R1657
R1658
R1659
R1660
R1661
R1662
R1663
R1665
R1675
R1677
R1706
R1709
R1710
R1711
R1712
R1715
R1720
R1721
R1722
R1902
R1903
R1904
R1905
R1906
R1907
R1908
R1909
R1910
R1911
R1912
R1913
R1914
R1915
R1916
R2007
R2008
R2009
R2010
R2011
R2012
RL1
RL2
RL21
RL22
RL51
RL52
RL81
RL82
RL111
RL112
RL141
RL142
RL171
RL172
RL201
RL202
RL231
RL232
RL261
RL262
RL351
RL352
RL353
RL381
RL401
RL402
RL410
RL431
RL902
RL903
RL1003RL1004
RL1005
RL1006
RL1201
RL1202
W1411
J2006
9
1
7
8
4
F
E
V
I
W
TO ANT-SW J3 TO CTRL J351
TO RF J810
TO DIGISEL J2 TO PLL J351
TO RF J1101
TO DC-DC J7
TO MAIN J941
2A
FUSE
XVRT
RXANT-IN
RXANT-OUT
DC-OUT METER KEYPAD
R1101
R1132
B6721D
J1501
MP1651
23
5
6
D
V
J
U
T
K
W
L
TO PLL J561
TO SCOPE J11
TO PLL J831
TO PLL J681
TO RF J352
TO SCOPE J1
TO PLL
J601
TO PA200W J1
TO MAIN J831
MP1652
RF
C1656 R1516
R538
R1228
CP1103
CP1102
G
M
RED
MP506
C1265
C576
TO RF J391
TO DIGISEL J1
DIP
CP802
CP801
H0H5H10
H15
H20H25H30H35H40H45
H50H55H60
H65H70H75H80
H85
H90H95H100H105H110H115H120H125H130H135
H140H145H150
H155H160H165H170
H175
V0 V5 V10 V15 V20 V25 V30 V35 V40 V45 V50 V55 V60 V65 V70 V75 V80 V85 V90 V95 V100V105V110V115V120V125V130V135V140V145V150V155V160V165V170V175V180V185V190V195V200V205V210V215V220V225V230V235V240V245V250
C1401
C1402
C1403
C1404 C1405
C1406
C1407
C1408
FI1401
2041L1041L
MIDDLE
B6739A
TUONI
MCF-M
H0H5H10H15H20H25H30H35
V0 V5 V10
C1401
C1402
C1403
C1404 C1405
C1406
C1407
C1408
FI1401
2041L1041L
NARROW
B6740A
TUONI
MCF-N
H0H5H10H15H20H25H30H35
V0 V5 V10
C1401
C1402
C1404
C1406
C1408
FI1401
2041L1041L
WIDE
B6722A
TUONI
MCF-W
H0H5H10H15H20H25H30H35
V0 V5 V10
• RF UNIT (TOP VIEW) • MCF-M BOARD
(TOP VIEW)
• MCF-N BOARD
(TOP VIEW)
• MCF-W BOARD
(TOP VIEW)
MCF-W BOARD
MCF-M BOARD
MCF-N BOARD
R1101
R1101
Preset
Preset
R1228
R1228
L1058
L1058
RX sensitivity adjustment
RX sensitivity adjustment
L1408
L1408
Image response adjustment
Image response adjustment
R1516
R1516
C1656
C1656
RX sensitivity
RX sensitivity
(50MHz)
(50MHz)
adjustment
adjustment
L1222
L1222
C1265
C1265
TX output power adjustment
TX output power adjustment
L505
L505
C576
C576
L512
L512
R538
R538
TX total gain adjustment
TX total gain adjustment
4 - 6
R1132
R1132
IF through (50MHz)
IF through (50MHz)
adjustment
adjustment
Preset
Preset
L1401
L1401
L1402
L1402
Preset
Preset
L1401
L1401
L1402
L1402
Preset
Preset
L1401
L1401
L1402
L1402
- ADJUSTMENT AND CHECK POINTS -
4 - 7
4-4 ADJUSTMENTS ONTHE PA200W BOARD
ADJUSTMENT ADJUSTMENT CONDITION OPERATION ADJUSTMENT
POINT VALUE
IDLING
(Preparation) "IDLING" must be adjusted by cold-started.
1 • Mode : USB
• MIC gain : Minimum • Connect an Audio Generator to the
MIC jack (see the page 4-2) and set
it as;
Frequency : 1.5 kHz
Level : 1 mV
––
2 1) Set 3 variable resisters to the preset
point.
2) Disconnect the W1 from the PA200W
BOARD, and connect an Ammeter
between the PA200W BOARD and
W1.
3) Measure the driving current, and
note it as the initial value.
R301, R407,
R410
Max.
counter
clockwise
IDLING
(DRIVER AMP.) 1 • Frequency : 14.100 MHz
• Mode : USB
• Transmitting
• Adjust the driving current with R301.R301 +1.0 A
more than
initial value
IDLING
(FINAL AMP.) 1 • Frequency : 14.100 MHz
• Mode : USB
• Transmitting
• Adjust the driving current with
variable resisters.R407 (for main
adjustment)
R425 (for critical
adjustment)
+2.0 A
more than
initial value
2R410 (for main
adjustment)
R426 (for critical
adjustment)
+3.0 A
more than
initial value
3 Apply slight vibration to the PA200W BOARD, and verify that the current is stable against the vibration.
C1
C2
C3
C4
C6
C7
C8
C9
C10
C11
C12
C15
C16
C17
C102
C103
C104
C106
C107
C108
C109
C110
C111
C112
C113
C114
C201
C202
C204
C206
C207
C301
C303
C305
C307
C309
C311
C313
C314
C317
C318
C319
C401C402
C403
C404
C405
C406
C407
C408
C409
C410
C411
C412
C413
C414
C415
C416
C417
C418
C419
C420
C501
C502
C503
C504
C505
C506
C507
C510
C511
C512
C513
C514
C515
C551
C553
C554
D1
D401
D402
D403D404
D551
EP501
EP502
IC2
J1
J2
J5
J401
J402
L1
L2
L3
L4
L6
L7
L101
L102
L201
L202
L301
L303
L304
L305
L306
L307
L401
L402
L403
L404
L501
Q1
Q2
Q101
Q201
Q301
Q401A
Q401B
R1
R2
R4
R5
R6
R7
R101
R102
R103
R104
R105
R106
R107
R108
R110
R111
R112
R113
R115
R117
R118
R119
R201
R202
R203
R205
R301
R302
R305
R307
R309
R310
R312
R401
R402
R403
R404
R405
R406
R407
R408R409
R410
R411
R412
R413
R414
R416 R418
R420R422
R423
R424
R425
R426
R427
R501
R502
R503
R504
R507
R508
R511
R512
R513
R514
R521
R522
R523
R551
R552
R554
R563
R564
R565
B6728A
R3
L404
Q301
W401
EP503
GRAY BLACK
W501
J5
4
3
2
5
67
DIP
TO MAIN J851
TO DC-DC J8
TO FILTER J901
PA200W
TO RF J801
D
C
Q401
J2
Q401
1
GRAY
BLACK
H0H5H10H15
H20
H25H30H35H40H45
H50H55
H60
H65H70H75H80H85
H90H95
H100H105H110
H115
H120H125H130
H135
H140H145
H150
H155
H160H165H170H175
H180
H185H190
H195
H200
V0 V5 V10 V15 V20 V25 V30 V35 V40 V45 V50 V55 V60 V65 V70 V75 V80 V85 V90 V95 V100
• PA200W BOARD
(TOP VIEW)
Idling adjustment (Driver amp.)
Idling adjustment (Driver amp.)
R301
R301
R407
R407
R410
R410
R425
R425
R426
R426
+
–
Ammeter
Idling adjustment (Final amp.)
Idling adjustment (Final amp.)
W1
(from REG UNIT)
+: Gray –: Black
4 - 8
- ADJUSTMENT AND CHECK POINTS -
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7
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