Yaesu FTM-7250DR Manual

Specications
Exploded View
Block Diagram
Alignment
Board Unit (Schematics, Layouts & Parts)
MAIN Unit
PANEL Unit
DSP Unit
VHF/UHF DIGITAL/ANALOG TRANSCEIVER
FTM-7250DR/DE
Introduction
This manual provides the technical information necessary for ser-
vicing the FTM-7250DR/DE Transceiver.
Servicing this equipment requires expertise in handing surface-
mount chip components. Attempts by non-qualified persons
to service this equipment may result in permanent damage not
covered by the warranty, and may be illegal in some countries.
While we believe the information in this manual to be correct,
YAESU assumes no liability for damage that may occur as a
result of typographical or other errors that may be present. Your
cooperation in pointing out any inconsistencies in the technical
information would be appreciated.
Contents
Technical Supplement
EH075M90B
©2019 YAESU MUSEN CO., LTD.
Important Note
This transceiver was assembled using Pb (lead) free solder, based on the RoHS specication.
Only lead-free solder (Alloy Composition: Sn-3.0Ag-0.5Cu) should be used for repairs performed on this apparatus. The solder stated
above utilizes the alloy composition required for compliance with the lead-free specication, and any solder with the above alloy com-
position may be used.

FTM-7250DR/DE Technical Supplement
Specications
SPECIFICATIONS-1
General
Frequency Range:
TX: 144 - 146 MHz or 144 - 148 MHz
430 - 440 MHz or 430 - 450 MHz
RX: 108 - 579.995 MHz
Channel Steps: 5/6.25/(8.33)/10/12.5/15/20/25/50/100 kHz ( ) Air Band
Standard Repeater Shift: VHF: ±600 kHz
UHF: ±5 / 1.6 / 7.6 MHz
Frequency Stability: ±2.5 ppm (–4 °F to +140 °F [–20 °C to +60 °C])
Modes of Emission: F2D/F3E/F7W
Antenna impedance: 50 Ohms, unbalanced
Supply Voltage: 13.8 V DC ±15%, negative ground
Current Consumption (typical): RX: less than 0.5 A
Tx: 10 A (50 W) /6 A (25 W) /4 A (5 W)
Operating Temperature: –4 °F to +140 °F (–20 °C to +60 °C)
Case Size (W x H x D) (approx.): 6.1” (W) × 1.7” (H) × 5.7” (D) (155 × 42 × 145.5 mm) (w/o knobs and FAN)
Weight (approx.): 2.86 lbs (1.3 kg)
Transmier
RF Power Output: 50 / 25 / 5 W
Modulation Type: F2D/F3E : Variable Reactance
F7W: 4FSK (C4FM)
Maximum Deviation: ±5 kHz (Wide)
±2.5 kHz (Narrow)
Spurious Radiation: Beer than -60 dB
Microphone Impedance: 2 k Ohms
Receiver
Circuit Type: Double Conversion Super heterodyne
IFs: 1 st: 47.25 MHz, 2 nd: 450 kHz
Sensitivity (for 12 dB SINAD): 1.5 μV typ for 10 dB SN (108 - 137 MHz, AM)
0.16 μV for 12 dB SINAD (137 - 174 MHz, NFM)
1 μV for 12 dB SINAD (174 - 222 MHz, NFM)
0.5 μV for 12 dB SINAD (300 - 350 MHz, NFM)
0.2 μV for 12 dB SINAD (350 - 400 MHz, NFM)
0.18 μV for 12 dB SINAD (400 - 470 MHz, NFM)
0.35 μV for 12 dB SINAD (470 - 580 MHz, NFM)
Sensitivity (for Digital): 0.19 μV typ for BER 1%
Selectivity: 12 kHz/28 kHz (−6 dB/−60 dB)
Maximum AF Output: 3 W into 4 Ohms with 10% THD
Specications are subject to change without notice, and are guaranteed within the 144 and 430 MHz ama-
teur bands only. Frequency ranges will vary according to transceiver version; check with your dealer.

EXPLODED VIEW-1 FTM-7250DR/DE Technical Supplement
Exploded View & Miscellaneous Parts
REF. YAESU P/N Description Qty.
①U20306007 BINDING HEAD SCREW M3X6B 3
②U24308001 BIND HEAD TAPTITE-B M3X8 14
③U03310002 SEMS SCREW ASM3X10NI 3
④RA6075900 STUD 1
⑤U20318007 BINDING HEAD SCREW M3X18B 4
⑥U24208001 BIND HEAD TAPTITE-B M2.6X8 5
⑦U9900310 RAMIMATE M2.6X6(3KA) 5
Non-designated parts are available only as part of a designated assembly.
Accessories
YAESU P/N Description
T90217152 DC Power Cable
T9026115 DC Power Cable (European Version)
Q0000151 Fuse (15 A)
Q0000172 Fuse (15 A, European Version)
RA607080A Mobile Mounting Bracket
T9101606 USB Cable
①
②
⑦
⑥
④
⑤
③
CS2660701
DSP ASSY
MAIN Unit
RA6069000
COVER(CHASSIS)
S5000288
FAN GUARD
M2090060A
FAN
RA606890A (Lot. 1-12)
RA606890C (Lot. 13-)
CHASSIS
RA6061700
RUBBER(FAN)
P1091172A
CONNECTOR
①
①
②②
②
②
②②②
②②
②②
②
②
T9207482 (CE OFF)
T9207483 (CE ON)
WIRE ASSY
RA609420A
BLIND SHEET(5X110)
⑤
⑤
⑤
③
③
⑦
⑦
⑦
⑦
⑥
⑥
⑥
⑥
⑥
RA6069100
RUBBER PACKING
T9207248
FW-ASSY
RA6089100
SPONGE RUBBER(10X15)
RA6070700
SPACER(SP)
RA0208800
COIL SPRING(SP)
M4090262
SPEAKER
RA6185100
LIGHT GUIDE(LED)
RA6185700
FRONT PANEL ASSY
RA6185400
RUBBER KNOB
RA6070500
LCD SPACER
RA6070100
REFLECTOR
RA6070600
INTER CONNECTOR
G6090246
LCD
PANEL Unit
RA606950A
VOLUME KNOB(ASSY)
RA606930A
ENCODER KNOB(ASSY)
RA6062400
ThermalConductivePad
RA606920A
COVER
CQ0897001
PANEL ASSY
CS2558703 (TYP A2)
CS2558704 (TYP B2)
CS2558705 (TYP B3)
MAIN-1 ASSY
RA6088100
REFLECTOR SHEET(LED) RA6185300
RUBBER KNOB
RA6105500
BLIND SHEET(5X70)
RA6203300
SHIELD CASE COVER

BLOCK DIAGRAM-1 FTM-7250DR/DE Technical Supplement
Block Diagram

FTM-7250DR/DE Technical Supplement
Alignment
ALIGNMENT-1
Introduction and Precautions
The FTM-7250DR/DE has been carefully aligned
at the factory for performance across the specied
amateur bands. Realignment should therefore
not be necessary except in the event of a compo-
nent failure. All component replacement and ser-
vice should be performed only by an authorized
YAESU representative, or the warranty policy may
be voided.
The following procedures cover the sometimes crit-
ical and tedious adjustments that are not normally
required once the transceiver has left the factory.
However, if damage occurs and some parts are re-
placed, realignment may be required. If a sudden
problem occurs during normal operation, it is like-
ly due to component failure; realignment should
not be done until after the faulty component has
been replaced.
We recommend that servicing be performed only
by authorized YAESU service technicians, who are
experienced with the circuitry and fully equipped
for repair and alignment. Therefore, if a fault is
suspected, contact the dealer from whom the trans-
ceiver was purchased for instructions regarding re-
pair. Authorized YAESU service technicians realign
all circuits and make complete performance checks
to ensure compliance with factory specifications
after replacing any faulty components.
Those who do undertake any of the following
alignments are cautioned to proceed at their own
risk. Problems caused by unauthorized aempts at
realignment are not covered by the warranty pol-
icy. Also, YAESU must reserve the right to change
circuits and alignment procedures in the interest of
improved performance, without notifying owners.
Under no circumstances should any alignment be
attempted unless the normal function and opera-
tion of the transceiver are clearly understood, the
cause of the malfunction has been clearly pinpoint-
ed and any faulty components replaced, and the
need for realignment determined to be absolutely
necessary.
Required Test Equipment
RF Signal Generator with calibrated output level
at 1 GHz
Deviation Meter (linear detector)
 In-line Wameter with 5% accuracy at 1 GHz
50-ohm, 100-W RF Dummy Load
8-ohm AF Dummy Load
Regulated DC Power Supply adjustable from
11.5 to 16 V DC, 15 A
Frequency Counter: 0.2-ppm accuracy at 1 GHz
AF Signal Generator
AC Voltmeter
DC Voltmeter: high impedance
VHF/UHF Sampling Coupler
SINAD Meter
Important Notice
Do not adjust the alignment menus that are
not mentioned in this manual.

FTM-7250DR/DE Technical Supplement
Alignment
ALIGNMENT-2
Alignment Preparation & Precautions
A 100-W RF dummy load and in-line wattmeter
must be connected to the main antenna jack in all
procedures that call for transmission; alignment
is not possible with an antenna. After complet-
ing one step, read the next step to see if the same
test equipment is required. If not, remove the test
equipment (except dummy load and wameter, if
connected) before proceeding. Correct alignment
requires the transceiver and test equipment be
maintained at a constant ambient temperature be-
tween 68 °F ~ 86 °F (20 °C ~ 30 °C). When the trans-
ceiver is brought into the shop from hot or cold air,
it should be allowed some time to come to room
temperature before alignment. Whenever possible,
alignments should be made with oscillator shields
and circuit boards rmly axed in place. Also, the
test equipment must be thoroughly warmed up be-
fore beginning.
Note: Signal levels in dB referred to in the alignment
procedure are based on 0 dBμ=0.5 μV (closed circuit).
Test Setup
Set up the test equipment as shown below for
transceiver alignment. Maintain the supply voltage
at 13.8V DC for all steps.
Internal System Alignment Routine
This uses a programmed routine in the transceiver
which simplies many previously complex discrete
component seings and adjustments with digital-
ly-controlled settings via front panel buttons and
LCD indications.
Programming the alignment password
1. Set the transceiver to the Analog-mode.
2. Press and hold in the [MHz(SETUP)]key for
one second, then rotate the DIAL knob to select
"OPEN MSG 28".
3. Press the [MHz(SETUP)]key, then rotate the
DIAL knob to select "MESSAGE".
4. Press the [V/M(MW)]key momentarily to enable
programming of the opening message. You will
notice the rst character entry’s location blink-
ing.
5. Rotate the DIAL knob to select the "A", then
press the [V/M(MW)]key momentarily to save
the "A" and move to the next character.
6. Repeat the previous step to complete the align-
ment password "AH075M".
7. When you have completed the password, press
and hold the [MHz(SETUP)]key for one second
to save the seings and exit to normal operation.
MIC JackTest Equipment Setup
MIC SW2
MIC SW1
GND +8V
MIC INPUT
PTT/CLONE
FTM-7250DR/DE
Inline
Wattmeter
SINAD MeterDeviation Meter
Frequency
Counter
RF
Signal Generator
AF
Signal Generator
50-Ohm
Dummy Load
MIC
ANT
EXT SP
RF Sampling
Coupler
DC INPUT

FTM-7250DR/DE Technical Supplement
Alignment
ALIGNMENT-3
To enter the Alignment mode
1. Set the transceiver to the Analog-mode.
2. Turn the transceiver o.
3. Press and hold in the [BAND(SQL)]and
[MODE(DG-ID)]keys while powering the trans-
ceiver on. The transceiver will enter the adjust-
ment mode, and the display will show the rst
alignment setting. Thereafter, the frequencies
used during alignment will automatically be set
without action by the technician.
In the alignment process, each adjustment is
selected by rotating the DIAL knob. The alignment
is performed by: pressing the [V/M(MW)]key
injecting a signal of the required frequency and
level; making the adjustment; and then pressing
the [V/M(MW)]key again, to store the adjustment.
To exit the alignment routine, press the [GM(AMS)]
key.
As each transceiver is individually optimized at
the factory, the precise seings for the transceiver
on your bench may be slightly dierent.
PLL Reference Frequency Adjustmen t
1. Rotate the DIAL knob to select the Alignment
Menu "rF".
2. Press the [V/M(MW)]key.
3. Press the PTT switch to transmit and rotate the
DIAL knob so that the frequency counter seing
is 440.000 MHz (±100 Hz).
4. Release the PTT switch, then press the
[V/M(MW)]key.
RF Front-end Tuning
1. Inject a 145.100 MHz signal at a level of -9 dBμV
(with 1 kHz modulation @±3.5 kHz deviation)
from the RF signal generator.
2. Press the [BAND(SQL)]key to enter the 144
MHz band.
3. Rotate the DIAL knob to select the Alignment
Menu "tn".
4. Press the [V/M(MW)]key.
5. Adjust the DIAL knob so that the maximum-
SINAD.
6. Press the [V/M(MW)]key.
7. Inject a 435.100 MHz signal at a level of -9 dBμV
(with 1 kHz modulation @±3.5 kHz deviation)
from the RF signal generator.
8. Press the [BAND(SQL)]key to enter the 430
MHz band.
9. Rotate the DIAL knob to select the Alignment
Menu "tn".
10.Press the [V/M(MW)]key.
11.Adjust the DIAL knob so that the maximum-
SINAD.
12.Press the [V/M(MW)]key.

FTM-7250DR/DE Technical Supplement
Alignment
ALIGNMENT-4
Squelch Threshold Level
1. Inject a 145.100 MHz signal at a level of -11
dBμV (with 1 kHz modulation @±3.5 kHz devia-
tion) from the RF signal generator.
2. Press the [BAND(SQL)]key to enter the 144
MHz band.
3. Rotate the DIAL knob to select the Alignment
Menu "tL".
4. Press the [V/M(MW)]key.
5. Press the [BAND(SQL)] key three times.
6. Press the [V/M(MW)]key.
7. Inject a 435.100 MHz signal at a level of -11
dBμV (with 1 kHz modulation @±3.5 kHz devia-
tion) from the RF signal generator.
8. Press the [BAND(SQL)]key to enter the 430
MHz band.
9. Rotate the DIAL knob to select the Alignment
Menu "tL".
10.Press the [V/M(MW)]key.
11.Press the [BAND(SQL)]key three times.
12.Press the [V/M(MW)]key.
Tight Squelch Level
1. Inject a 145.100 MHz signal at a level of -3 dBμV
(with 1 kHz modulation @±3.5 kHz deviation)
from the RF signal generator.
2. Press the [BAND(SQL)]key to enter the 144
MHz band.
3. Rotate the DIAL knob to select the Alignment
Menu "tH".
4. Press the [V/M(MW)]key.
5. Press the [BAND(SQL)]key three times.
6. Press the [V/M(MW)]key.
7. Inject a 435.100 MHz signal at a level of -3 dBμV
(with 1 kHz modulation @±3.5 kHz deviation)
from the RF signal generator.
8. Press the [BAND(SQL)]key to enter the 430
MHz band.
9. Rotate the DIAL knob to select the Alignment
Menu "tH".
10.Press the [V/M(MW)]key.
11.Press the [BAND(SQL)]key three times.
12.Press the [V/M(MW)]key.

FTM-7250DR/DE Technical Supplement
Alignment
ALIGNMENT-5
S-meter Level (S1)
1. Inject a 145.100 MHz signal at a level of -5 dBμV
(with 1 kHz modulation @±3.5 kHz deviation)
from the RF signal generator.
2. Press the [BAND(SQL)]key to enter the 144
MHz band.
3. Rotate the DIAL knob to select the Alignment
Menu "S1".
4. Press the [V/M(MW)]key.
5. Press the [BAND(SQL)]key three times.
6. Press the [V/M(MW)]key.
7. Inject a 435.100 MHz signal at a level of -5 dBμV
(with 1 kHz modulation @±3.5 kHz deviation)
from the RF signal generator.
8. Press the [BAND(SQL)]key to enter the 430
MHz band.
9. Rotate the DIAL knob to select the Alignment
Menu "S1".
10.Press the [V/M(MW)]key.
11.Press the [BAND(SQL)]key three times.
12.Press the [V/M(MW)]key.
S-meter Level (S9)
1. Inject a 145.100 MHz signal at a level of -23
dBμV (with 1 kHz modulation @±3.5 kHz devia-
tion) from the RF signal generator.
2. Press the [BAND(SQL)]key to enter the 144
MHz band.
3. Rotate the DIAL knob to select the Alignment
Menu "S9".
4. Press the [V/M(MW)]key.
5. Press the [BAND(SQL)]key three times.
6. Press the [V/M(MW)]key.
7. Inject a 435.100 MHz signal at a level of -23
dBμV (with 1 kHz modulation @±3.5 kHz devia-
tion) from the RF signal generator.
8. Press the [BAND(SQL)]key to enter the 430
MHz band.
9. Rotate the DIAL knob to select the Alignment
Menu "S9".
10.Press the [V/M(MW)]key.
11.Press the [BAND(SQL)]key three times.
12.Press the [V/M(MW)]key.

FTM-7250DR/DE Technical Supplement
Alignment
ALIGNMENT-6
TX Power (High)
1. Press the [BAND(SQL)]key to enter the 144
MHz band.
2. Rotate the DIAL knob to select the Alignment
Menu "HP".
3. Press the [V/M(MW)]key.
4. Press the PTT switch to activate the transmier,
adjust the DIAL knob so that the RF Power Me-
ter reading is 50 W (±1.5 W).
5. Release the PTT switch, then press the
[V/M(MW)]key.
6. Press the [BAND(SQL)]key to enter the 430
MHz band.
7. Rotate the DIAL knob to select the Alignment
Menu "HP".
8. Press the [V/M(MW)]key.
9. Press the PTT switch to activate the transmier,
adjust the DIAL knob so that the RF Power Me-
ter reading is 50 W (±1.5 W).
10.Release the PTT switch, then press the
[V/M(MW)]key.
TX Power (Mid)
1. Press the [BAND(SQL)]key to enter the 144
MHz band.
2. Rotate the DIAL knob to select the Alignment
Menu "L3".
3. Press the [V/M(MW)]key.
4. Press the PTT switch to activate the transmier,
adjust the DIAL knob so that the RF Power Me-
ter reading is 25 W (±1 W).
5. Release the PTT switch, then press the
[V/M(MW)]key.
6. Press the [BAND(SQL)]key to enter the 430
MHz band.
7. Rotate the DIAL knob to select the Alignment
Menu "L3".
8. Press the [V/M(MW)]key.
9. Press the PTT switch to activate the transmier,
adjust the DIAL knob so that the RF Power Me-
ter reading is 25 W (±1 W).
10.Release the PTT switch, then press the
[V/M(MW)]key.

FTM-7250DR/DE Technical Supplement
Alignment
ALIGNMENT-7
TX Power (Low)
1. Press the [BAND(SQL)]key to enter the 144
MHz band.
2. Rotate the DIAL knob to select the Alignment
Menu "L2".
3. Press the [V/M(MW)]key.
4. Press the PTT switch to activate the transmier,
adjust the DIAL knob so that the RF Power Me-
ter reading is 5 W (±0.5 W).
5. Release the PTT switch, then press the
[V/M(MW)]key.
6. Press the [BAND(SQL)]key to enter the 430
MHz band.
7. Rotate the DIAL knob to select the Alignment
Menu "L2".
8. Press the [V/M(MW)]key.
9. Press the PTT switch to activate the transmier,
adjust the DIAL knob so that the RF Power Me-
ter reading is 5 W (±0.5 W).
10.Release the PTT switch, then press the
[V/M(MW)]key.
TX Deviation
1. Inject a 1 kHz, 50 mV signal from the Audio
Generator.
2. Press the [BAND(SQL)]key to enter the 144
MHz band.
3. Rotate the DIAL knob to select the Alignment
Menu "dU".
4. Press the [V/M(MW)]key.
5. Press the PTT switch to activate the transmier,
adjust the DIAL knob so that the Deviation Me-
ter reading is 4.2 kHz ±0.1 kHz (USA Version) or
4.5 kHz ±0.1 kHz (European/Asian Version).
6. Release the PTT switch, then press the
[V/M(MW)]key.
7. Press the [BAND(SQL)]key to enter the 430
MHz band.
8. Rotate the DIAL knob to select the Alignment
Menu "dU".
9. Press the [V/M(MW)]key.
10.Press the PTT switch to activate the transmier,
adjust the DIAL knob so that the Deviation Me-
ter reading is 4.2 kHz ±0.1 kHz (USA Version) or
4.5 kHz ±0.1 kHz (European/Asian Version).
11.Release the PTT switch, then press the
[V/M(MW)]key.

FTM-7250DR/DE Technical Supplement
Alignment
ALIGNMENT-8
CTCSS TX Deviation
1. Press the [BAND(SQL)]key to enter the 144
MHz band.
2. Rotate the DIAL knob to select the Alignment
Menu "103".
3. Press the [V/M(MW)]key.
4. Press the PTT switch to activate the transmier,
adjust the DIAL knob so that the Deviation Me-
ter reading is 0.65 kHz ±0.1 kHz.
5. Release the PTT switch, then press the
[V/M(MW)]key.
6. Press the [BAND(SQL)]key to enter the 430
MHz band.
7. Rotate the DIAL knob to select the Alignment
Menu "103".
8. Press the [V/M(MW)]key.
9. Press the PTT switch to activate the transmier,
adjust the DIAL knob so that the Deviation Me-
ter reading is 0.65 kHz ±0.1 kHz.
10.Release the PTT switch, then press the
[V/M(MW)]key.
DCS TX Deviation
1. Press the [BAND(SQL)]key to enter the 144
MHz band.
2. Rotate the DIAL knob to select the Alignment
Menu "dC".
3. Press the [V/M(MW)]key.
4. Press the PTT switch to activate the transmier,
adjust the DIAL knob so that the Deviation Me-
ter reading is 0.65 kHz ±0.1 kHz.
5. Release the PTT switch, then press the
[V/M(MW)]key.
6. Press the [BAND(SQL)]key to enter the 430
MHz band.
7. Rotate the DIAL knob to select the Alignment
Menu "dC".
8. Press the [V/M(MW)]key.
9. Press the PTT switch to activate the transmier,
adjust the DIAL knob so that the Deviation Me-
ter reading is 0.65 kHz ±0.1 kHz.
10.Release the PTT switch, then press the
[V/M(MW)]key.
Closing the Alignment mode
1. Press the [GM(AMS)]key to save the new set-
ting and exit to normal operation.
2. The next time the transceiver is turned on, nor-
mal operation will resume.

FTM-7250DR/DE Technical Supplement
MAIN-1
Circuit Diagram
MAIN Unit (Lot. 1)

FTM-7250DR/DE Technical Supplement
MAIN-2
Parts Layout (Side A)
MAIN Unit (Lot. 1)
1
2
3
4
5
ABCDEFG

FTM-7250DR/DE Technical Supplement
MAIN-3
Parts Layout (Side B)
MAIN Unit (Lot. 1)
1
2
3
4
5
abcdefg

FTM-7250DR/DE Technical Supplement
MAIN-4
Circuit Diagram
MAIN Unit (Lot. 2)

FTM-7250DR/DE Technical Supplement
MAIN-5
Parts Layout (Side A)
MAIN Unit (Lot. 2)
1
2
3
4
5
ABCDEFG

FTM-7250DR/DE Technical Supplement
MAIN-6
Parts Layout (Side B)
MAIN Unit (Lot. 2)
1
2
3
4
5
abcdefg

FTM-7250DR/DE Technical Supplement
MAIN-7
Circuit Diagram
MAIN Unit (Lot. 3 - 4)

FTM-7250DR/DE Technical Supplement
MAIN-8
Parts Layout (Side A)
MAIN Unit (Lot. 3 - 4)
1
2
3
4
5
ABCDEFG