Yaesu FT8800 User Manual
Dual Band FM Transceiver
FT-8800R
Technical Supplement
2003 VERTEX STANDARD CO., LTD. (EH018M90A
©
VERTEX STANDARD CO., LTD.
4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan
VERTEX STANDARD
US Headquarters
10900 Walker Street, Cypress, CA 90630, U.S.A.
International Division
8350 N.W. 52nd Terrace, Suite 201, Miami, FL 33166, U.S.A.
YAESU EUROPE B.V.
P.O. Box 75525, 1118 ZN Schiphol, The Netherlands
YAESU UK LTD.
Unit 12, Sun Valley Business Park, Winnall Close
Winchester, Hampshire, SO23 0LB, U.K.
VERTEX STANDARD HK LTD.
)
Unit 5, 20/F., Seaview Centre, 139-141 Hoi Bun Road,
Kwun Tong, Kowloon, Hong Kong
SCN
4
5
6
PWR
1
2
SQL SQL
VOL VOL
3
LOW
V/M
HM
SCN
KEY2
LOW
HM
V/M
Introduction
This manual provides technical information necessary for servicing the FT-8800R Transceiver.
Servicing this equipment requires expertise in handling 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.
Two PCB layout diagrams are provided for each double-sided circuit board in the transceiver. Each side of thr board is
referred to by the type of the majority of components installed on that side (“leaded” or “chip-only”). In most cases one
side has only chip components, and the other has either a mixture of both chip and leaded components (trimmers, coils,
electrolytic capacitors, ICs, etc.), or leaded components only.
While we believe the technical information in this manual to be correct, Vertex Standard 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
Specifications ..................................................... 2
Exploded View & Miscellaneous Parts ......... 3
Block Diagram ....................................................5
Circuit Description ............................................7
Alignment ......................................................... 11
Board Unit (Schematics, Layouts & Parts)
Main Unit ...................................................................... 17
Panel Unit ..................................................................... 45
Panel-Sub Unit ............................................................. 51
VR-L Unit ...................................................................... 53
VR-R Unit ...................................................................... 54
1
Specifications
GENERAL
Frequency Range: RX: 108.000 - 520.000 MHz,
700.000 - 999.995 MHz (Cellular Blocked)
TX: 144.000 - 146.000 MHz (or 144.000 - 148.000 MHz),
430.000 - 440.000 MHz (or 430.00 - 450.000 MHz)
Channel Steps: 5/10/12.5/15/20/25/50 kHz
Modes of Emission: F3, F2
Antenna Impedance: 50-Ohms, unbalanced (Antenna Duplexer built-in)
Frequency Stability: ±5 ppm @ 14° F ~ +140° F (–10 °C ~ +60 °C)
Operating Temperature Range: –4° F ~ +140° F (–20 °C ~ +60 °C)
Supply Voltage: 13.8 VDC (±15%), negative ground
Current Consumption (Approx.): RX: 0.5 A (Squelched)
TX: 8.5 A (144 MHz), 8.0 A (430 MHz)
Case Size (W x H x D): 5.5” x 1.6” x 6.6” (140 x 41.5 x 168 mm) (w/o knobs & connectors)
Weight (Approx.): 2.2 lb (1 kg)
TRANSMITTER
Output Power: 50/20/10/5 W (144 MHz),
35/20/10/5 W (430 MHz)
Modulation Type: Variable Reactance
Maximum Deviation: ±5 kHz
Spurious Radiation: Better than –60 dB
Microphone Impedance:2 kΩ
DATA Jack Impedance: 10 kΩ
RECEIVER
Circuit Type: Double-conversion superheterodyne
Intermediate Frequencies: 45.05 MHz/450 kHz (Main band),
47.25 MHz/450 kHz (Sub band)
Sensitivity (for 12dB SINAD): Better than 0.2 µV
Squelch Sensitivity: Better than 0.16 µV
Selectivity (–6dB/–60dB): 8 kHz/30 kHz
Maximum AF Output: 2 W @ 8 Ω for 5% THD
AF Output Impedance: 4-16 Ω
Specifications are subject to change without notice, and are guaranteed within the 144 and 430 MHz amateur bands only. Frequen-
cy ranges will vary according to transceiver version; check with your dealer.
2
Exploded View & Miscellaneous Parts
RA02132A0
HIMERON TAPE
M4090149
SPEAKER
T9206438A
WIRE ASSY
R0150630
HOLDER
MAIN UNIT
RA0438700
RUBBER
RA0446200
LEAF SPRING
RA0415200 (x2 pcs)
GROUND PLATE
RA0441300
PAD
CS1770001
CASE (W/O NYLON NET)
T9206228
WIRE ASSY
S5000206
FAN GUARD
M2090034A
FAN
FRONT PANEL ASSY
RA0404200 (x2 pcs)
ENCODER KNOB
RA0404300 (x2 pcs)
KNOB
RA0507300
REFLECTOR SHEET
G6090147A
RA0396800
LCD HOLDER
R6054387B (x2 pcs)
SPECIAL NUT
RA0404400 (x2 pcs)
KNOB
RA0397100
LCD
RA0396900 (x2 pcs)
INTER CONNECTOR
VR-L Unit
RA040710A
LIGHT SHEET
PANEL Unit
RA0397000
DIFFUSER SHEET
RELEASE KNOB
RA0407200
SPACER
RA0396700
LIGHT GUIDE
COIL SPRING
RA026900A
T9207010A
WIRE ASSY
VR-R UNIT
R0137550
RA02668AA
CHASSIS
T9101509
CT CABLE
PANEL-SUB UNIT
RA0396100
REAR PANEL
RA040480A
SUB PANEL ASSY
(W/ COIL SPRING, RELEASE KNOB)
P1090984
CONNECTOR
No. VXSTD P/N DESCRIPTION QTY.
U23116007 TAPTITE SCREW M2X16B 4
U31206007 OVAL HEAD SCREW M2.6X6B 14
U44308002 TAPTITE SCREW M3X8NI 17
U03310002 SEMS SCREW ASM3X10NI 4
U20308002 BINDING HEAD SCREW M3X8NI 2
U20318007 BINDING HEAD SCREW M3X18B 4
SUPPLIED ACCESSORIES
VXSTD P/N DESCRIPTION QTY.
AAA43X001 MH-48
A07530005 MH-42
T9021715 DC POWER CORD W/FUSE 1
Q0000081 SPARE FUSE 15 A 2
A6J
(depending on transceiver version)
B6JS
1
Non-designated parts are available only
as part of a designated assembly.
3
Exploded View & Miscellaneous Parts
Note:
4
Block Diagram
5
Block Diagram
Note:
6
Circuit Description
Receiver Signal Path
“Main” Band 430 MHz Signal
The 430 MHz signal is passed through a high-pass filter
network and a low-pass filter network to the antenna
switch diodes D1029, D1030 (both RSL135) and D1001
(HSC277TRF), then passed through another low-pass filter network to the “Main” band RF amplifier Q1001
(3SK296ZQ).
The amplified 430 MHz signal is passed through the band
switch D1002 (HSC277) to the varactor-tuned band-pass
filter network consisting of D1004, D1005, and D1006 (all
HVC350B) and associated circuitry, then applied to the
first mixer Q1003 (3SK296ZQ). Meanwhile, the UHF local signal from the UHF-VCO/B Q1116 (2SC5006) is de-
livered to first mixer Q1003, yielding the 45.05 MHz
“Main” band first IF.
“Main” Band 144 MHz Signal
The 144 MHz signal is passed through a low-pass filter
network and a high-pass filter network to the antenna
switch diodes D1113, D1114 (both UM9957F), D1115,
D1116 (both RLS135) and D1117 (both RLS135) then
passed through another low-pass filter network to the
“Main” band RF amplifier Q1014 (3SK296ZQ).
The amplified 144 MHz signal is passed through a varactor-tuned band-pass filter network consisting of D1017,
D1018, D1019 (all HVC365) and associated circuitry to
the first mixer Q1016 (3SK296ZQ). Meanwhile, the VHF
local signal from the VHF-VCO/B Q1120 (2SC5374) is
delivered to first mixer Q1016, yielding the 45.05 MHz
“Main” band first IF.
The demodulated “Main” band audio is passed through
the de-emphasis network, audio switch D1047 (DAN222),
low-pass filter network (consisting of Q1052 (NJM2902V)
and associated circuitry), and a high-pass filter network
(consisting of Q1054 (NJM2904V) and associated circuit-
ry). The filtered audio signal is passed through the audio
volume control IC Q1063 (M51132FP), which adjusts the
audio sensitivity to compensate for audio level variations,
then is delivered to the audio switch Q1066 and Q1067
(both TC4W66FU).
When the internal speaker is selected, the audio signal is
amplified by Q1069 (TDA7233D) then applied to the in-
ternal loudspeaker. When the external speaker is selected, the audio signal is amplified by Q1068 (LA4425A),
then it passes through the EXT SP jack to the external loudspeaker.
“Sub” Band 430 MHz Signal
The 430 MHz signal is passed through a high-pass filter
network and a low-pass filter network to the antenna
switch diodes D1029, D1030 (both RSL135) and D1001
(HSC277TRF), then passed through another low-pass filter network to the “Sub” band RF amplifier Q1002
(3SK296ZQ).
The amplified 430 MHz signal is delivered through the
band switch D1009 (HSC277) to the varactor-tuned band-
pass filter network consisting of D1011, D1012, D1013 (all
HVC350B) and associated circuitry, then applied to the
first mixer Q1005 (3SK296ZQ). Meanwhile, the UHF local signal from the UHF-VCO/A Q1123 (2SC5006) is de-
livered to first mixer Q1005, yielding the 47.25 MHz “Sub”
band first IF.
“Main” Band IF and AF Signals
The 45.05 MHz “Main” band first local signal is delivered
to the monolithic crystal filter XF1001 which strips away
unwanted mixer products, then is passed through IF amplifier Q1027 (2SC4400) to the IF IC Q1044 (TA31136FN).
Meanwhile, a portion of the output of 11.15 MHz crystal
X1002 is multiplied fourfold by Q1042 (2SC4400) to pro-
vide the 44.6 MHz second local signal, then delivered to
the IF IC Q1044. Within the IF IC Q1044, the 44.6 MHz
second local signal is mixed with the 45.05 MHz “Main”
band first local signal to produce the 450 kHz “Main” band
second IF.
The 450 kHz “Main” band second IF is passed through
the filter switch D1039/D1041 (both HSC277) to the ceramic filter CF1001 (CFWM450E) which strips away all
but the desired signal, then it passes through the IF amplifier within Q1044 to the ceramic discriminator CD1001
(CDBM450C24), which removes any amplitude variations
in the 450 kHz IF signal before detection of speech.
“Sub” Band 144 MHz Signal
The 144 MHz signal is passed through a low-pass filter
network and a high-pass filter network to the antenna
switc diodes D1113, D1114 (both UM9957F), D1115,
D1116 (both RLS135) and D1117 (both RLS135), then
passed through another low-pass filter network to the
“Sub” band RF amplifier Q1015 (3SK296ZQ).
The amplified 144 MHz signal is passed through the varactor-tuned band-pass filter network consisting of D1020,
D1021, D1022 (all HVC365) and associated circuitry to
the first mixer Q1017 (3SK296ZQ). Meanwhile, the VHF
local signal from the VHF-VCO/A Q1126 (2SC5374) is
delivered to first mixer Q1017, yielding the 47.25 MHz
“Sub” band first IF.
“Sub” Band IF and AF Signal
The 47.25 MHz “Sub” band first IF is delivered to the
monolithic crystal filter XF1002 which strips away unwanted mixer products, then passed through the IF amplifier Q1035 (2SC4400) to the IF IC Q1047 (TA31136FN).
7
Circuit Description
Meanwhile, a portion of the output of 11.7 MHz crystal
X1003 is multiplied fourfold by Q1043 (2SC4400) to pro-
vide the 46.8 MHz second local signal, then applied to the
IF IC Q1047. Within the IF IC Q1047, the 46.8 MHz second
local signal is mixed with the 47.25 MHz “Sub” band first
local signal to produce the 450 kHz “Sub” band second IF.
The 450 kHz “Sub” band second IF is delivered to the
ceramic filter CF1003 (CFWM450E) which strips away all
but the desired signal, then passed through the IF amplifier within Q1047 to the ceramic discriminator CD1002
(CDBM450C24) which removes any amplitude variations
in the 450 kHz IF signal before detection of speech.
The demodulated “Sub” band audio is passed through the
de-emphasis network, audio switch D1048 (DAN222),
low-pass filter network (consisting of Q1053 (NJM2902V)
and associated circuitry) and the high-pass filter network
(consisting of Q1054 (NJM2904V) and associated circuit-
ry). The filtered audio signal is passed through the audio
volume control IC Q1063 (M511312FP), which adjusts the
audio sensitivity to compensate for audio level variations,
then is delivered to the audio switch Q1066 and Q1067
(both TC4W66FU).
When the internal speaker is selected, the audio signal is
amplified by Q1069 (TDA7233D) then applied to the in-
ternal loudspeaker. When the external speaker is selected, the audio signal is amplified by Q1068 (LA4425A),
then it passes through the EXT SP jack to the external loudspeaker.
Squelch Control
“Main” Band
When no carrier is being received on the “Main” band,
noise at the output of the detector stage in Q1044 is amplified and band-pass filtered by the noise amp section of
Q1044. The resulting DC voltage is delivered to pin 5 of
main CPU Q1104 (M38268MCL), which compares the
squelch threshold level to that which set by the front panel SQL knob.
While no carrier is being received on the “Main” band,
pin 2 of Q1105 remain “low,” to disable the audio output
from the speaker.
Transmitter Signal Path
AF Signal
The speech signal from the microphone is passed through
the MIC jack J3003 to the AF amplifier Q3001 (NJM2904V)
on the PANEL-SUB UNT. The amplified speech signal is
passed through the panel separation jacks J3001 and J1005
to the MAIN Unit. On the MAIN UNIT, the speech signal
is delivered to the limiting amplifier Q1074 (NJM2902V) to
prevent over-modulation, then is delivered to a low-pass
filter network consisting of Q1074 and associated circuitry.
430 MHz Signal
The adjusted speech signal from Q1074 is passed through
transistor switch Q1114, Q1115 (both DTC144EE) to varactor diodes D1079 (HVC375B) and D1080 (HVC350B),
which frequency modulate the transmitting VCO, made
up of UHF-VCO/B Q1116 (2SC5006) and D1081
(HSC277).
The modulated transmit signal is passed through buffer
amplifiers Q1117, Q1118 and Q1119 (all 2SC5006) and
diode switches D1099, D1101 (both HSC277) to the pre-
drive amplifier Q1132 (2SK2596).
The amplified transmit signal from Q1132 is passed
through diode switch D1106 (HSC277) and the driver am-
plifier Q1134 (RD07MVS1) to the diode switch D1107
(HSC277), then finally amplified by power amplifier
Q1135 (RD70HVF1), providing up to 35 Watts of power
output. These three stages of the power amplifier’s gain
are controlled by the APC circuit.
The 35-Watt RF signal is passed through a high-pass filter network to the antenna switch D1118, D1119, and
D1120 (all UM9957F), then passed through a low-pass
filter network and another high-pass filter network to the
ANT jack.
144 MHz Signal
The adjusted speech signal from Q1074 is passed through
the transistor switch Q1114, Q1115 (both DTC144EE) to
varactor diodes D1082 and D1085 (both HVC365), which
frequency modulate the transmitting VCO, made up of
VHF-VCO/B Q1120 (2SC5374) and D1083 (HVC131).
“Sub” Band
When no carrier is being received on the “Sub” band, noise
at the output of the detector stage in Q1047 is amplified
and band-pass filtered by the noise amp section of Q1047.
The resulting DC voltage is delivered to pin 2 of main
CPU Q1104, which compares the squelch threshold level
to that which set by the front panel SQL knob.
While no carrier is being received on the “Right” band,
pin 15 of Q1105 remain “low,” to disable the audio output from the speaker.
8
The modulated transmit signal is passed through buffer
amplifiers Q1121 and Q1122 (both 2SC5374) and diode
switches D1089 and D1102 (both HSC277) to the pre-drive
amplifier Q1132 (2SK2596).
The amplified transmit signal from Q1132 is passed
through the diode switch D1105, D1106 (both HSC277)
and the driver amplifier Q1134 (RD07MVS1) to diode
switch D1108 (RLS135), then finally amplified by power
amplifier Q1135 (RD70HVF1) up to 50 Watts of power
output. These three stages of the power amplifier’s gain
are controlled by the APC circuit.
Circuit Description
The 50-Watt RF signal is passed through a low-pass filter
network to the antenna switch D1113 and D1114
(UM9957F), then passed through a high-pass filter network and another low-pass filter network to the ANT jack.
APC (Automatic Power Control) Circuit
430 MHz
A portion of the power amplifier output is rectified by
D1121 and D1122 (both MA2S728) then delivered to APC
Q1129 (NJM2904V), as a DC voltage which is proportional
to the output level of the power amplifier.
At Q1129, the rectified DC voltage from the power amplifier is compared to the reference voltage from the main
CPU Q1104 to produce a control voltage, which regulates
the supply voltage to the pre-drive amplifier Q1132
(2SK2596), driver amplifier Q1134 (RD07MVS1), and
power amplifier Q1135 (RD70HVF1), so as to maintain
stable output power under varying antenna loading conditions.
144 MHz
A portion of the power amplifier output is rectified by
D1109 and D1110 (both MA2S728) then delivered to APC
Q1129 (NJM2904V), as a DC voltage which is proportional
to the output level of the power amplifier.
At Q1129, the rectified DC voltage from the power amplifier is compared to the reference voltage from the main
CPU Q1104 to produce a control voltage, which regulates
the supply voltage to the pre-drive amplifier Q1132
(2SK2596), driver amplifier Q1134 (RD07MVS1), and
power amplifier Q1135 (RD70HVF1), so as to maintain
stable output power under varying antenna loading conditions.
PTT (Push to Talk) Circuit
430 MHz
When the PTT switch is pressed, pin 8 of sub CPU Q2001
(M38223M4M) goes “high,” which sends the “PTT” command to main CPU Q1104.
When the “PTT” command is received, the main CPU
controls the I/O IC Q1095 (BU2090FS), causing pin 8 of
Q1095 to go “low” which activates the UHF TX switch
section of Q1096 (IMT17).
When the UHF TX switch section of Q1096 is activated, it
controls the antenna switch diodes D1118, D1119, and
D1120 (all UM9957F), modulator switching diode D1088
(DAN222), modulator switching transistor Q1114 and
Q1115 (both DTC144EE), diode switches D1099, D1101,
D1106 and D1107 (all HSC277), and APC switches Q1130
(DTA144EE) and Q1131 (DTC144EE), which activate the
430 MHz transmitter circuit.
144 MHz
When the PTT switch is pressed, pin 8 of sub CPU Q2001
(M38223M4M) goes “high,” which sends the “PTT” command to main CPU Q1104.
When the “PTT” command is received, the main CPU
controls the I/O IC Q1095 (BU2090FS), causing pin 9 of
Q1095 to go “low” which activates the VHF TX switch
section of Q1096 (IMT17).
When the VHF TX switch section of Q1096 is activated, it
controls the antenna switch diodes D1113 and D1114
(both UM9957F), D1117 (HSC277) and D1115, D1116
(RLS135), modulator switching transistor Q1114 and
Q1115 (both DTC144EE), diode switches D1089, D1102,
D1105, D1106 (all HSC277) and D1108 (RLS135), and APC
switches Q1130 (DTA144EE) and Q1131 (DTC144EE),
which activate the 144 MHz transmitter circuit.
PLL Circuit
“Main” band
A portion of the output from UHF-VCO/B Q1116
(2SC5006) is passed through buffer amplifier Q1117
(2SC5006) and diode switch D1086 (HSC277) to the programmable divider section of the PLL IC Q1109
(MB15A02PFV1), where it is divided according to the frequency dividing data associated with the operating frequency input from the main CPU Q1104. It is then sent to
the phase comparator.
A portion of the output from the VHF-VCO/B Q1120
(2SC5374) is passed through buffer amplifier Q1121
(2SC5374) and diode switch D1087 (HSC277) to the programmable divider section of the PLL IC Q1109, where it
is divided according to the frequency dividing data associated with the operating frequency input from the main
CPU Q1104. It is then sent to the phase comparator.
The 11.15 MHz reference oscillator X1002 frequency is divided by the reference frequency divider section of Q1109
into 2230 or 1784 parts, to become 5 kHz or 6.25 kHz comparative reference frequencies, which are utilized by the
phase comparator.
The phase comparator section of Q1109 compares the
phase between the frequency-divided oscillation frequency of the VCO circuit and the comparative frequency, and
its output is a pulse corresponding to the phase difference. This pulse is integrated by the loop filter into a control voltage (VCV) to control the oscillation frequency of
the VCOs.
9
Circuit Description
“Sub” band
A portion of the output from the UHF-VCO/A Q1123
(2SC5006) is passed through buffer amplifier Q1124
(2SC5006) and diode switch D1093 (HVC131) to the programmable divider section of the PLL IC Q1122
(MB15A02PFV1), where it is divided according to the frequency dividing data associated with the operating frequency input from the main CPU Q1104. It is then sent to
the phase comparator.
A portion of the output from the VHF-VCO/A Q1126
(2SC5374) is passed through buffer amplifier Q1127
(2SC5374) and diode switch D1097 (HVC131) to the programmable divider section of the PLL IC Q1122, where it
is divided according to the frequency dividing data associated with the operating frequency input from the main
CPU Q1104. It is then sent to the phase comparator.
The 11.7 MHz reference oscillator X1003 frequency is divided by the reference frequency divider section of Q1122
into 2340 or 1872 parts to become 5 kHz or 6.25 kHz comparative reference frequencies, which are utilized by the
phase comparator.
Power Supply Line
When the user presses and holds in the “Right” VOL knob
for 2 seconds, pin 23 of the main CPU Q1104 goes “low”
and pin 40 of main CPU Q1104 goes “high,” which activates the power switch Q1078 (2SB1301) and Q1082
(2SC4617), to supply 13.8 VDC to each circuit in the transceiver.
The phase comparator section of Q1122 compares the
phase between the frequency-divided oscillation frequency of the VCO circuit and the comparative frequency, and
its output is a pulse corresponding to the phase difference. This pulse is integrated by the loop filter into a control voltage (VCV) to control the oscillation frequency of
the VCOs.
10
Alignment
Introduction and Precautions
The FT-8800R has been carefully aligned at the factory
for the specified performance across the 144 MHz and 430
MHz amateur bands. Realignment should therefore not
be necessary except in the event of a component failure.
All component replacement and service should be performed only by an authorized Vertex Standard representative, or the warranty policy may be voided.
The following procedures cover the sometimes critical and
tedious adjustments that are not normally required once
the transceiver has left the factory. However, if damage
occurs and some parts are replaced, realignment may be
required. If a sudden problem occurs during normal operation, it is likely 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 Vertex Standard 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 transceiver was purchased
for instructions regarding repair. Authorized Vertex Standard 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 attempts at realignment are not covered
by the warranty policy. Also, Vertex Standard 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 operation of the transceiver are clearly understood, the cause of the malfunction has been clearly pinpointed and any faulty components replaced, and the need for realignment determined
to be absolutely necessary.
SINAD
Meter
8-ohm
Dummy Load
EXT SP
Power Supply
13.8 VDC
RF Signal
Generator
DUAL BAND FM TRANSCEIVER
FT-8800R
RF Sampling
Coupler
Pin 5
Inline
Wattmeter
50-ohm
Dummy Load
Frequency
Counter
Deviation
Meter
AF Signal
Generator
Required Test Equipment
The following test equipment (and thorough familiarity
with its correct use) is necessary for complete realignment.
Correction of problems caused by misalignment resulting from use of improper test equipment is not covered
under the warranty policy. While most steps do not require all of the equipment listed, the interactions of some
adjustments may require that more complex adjustments
be performed afterwards. Do not attempt to perform only
a single step unless it is clearly isolated electrically from
all other steps. Have all test equipment ready before beginning, and follow all of the steps in a section in the order presented.
Regulated DC Power Supply: adjustable from 11.5 to
16 VDC, 10 A
RF Signal Generator with calibrated output level at
500 MHz
Frequency Counter: ±0.1 ppm accuracy at 500 MHz
AF Signal Generator
SINAD Meter
Oscilloscope
Spectrum Analyzer
Deviation Meter (linear detector)
AF Milivoltmeter
AF Dummy Load: 8-Ohm, 5 W
DC Voltmeter: high impedance
Inline Wattmeter with 5% accuracy at 500 MHz
50-Ohm non-reactive Dummy Load:
100 watts at 500 MHz
VHF/UHF Sampling Coupler
Set up the test equipment as shown for the transceiver
alignment, and apply 13.8 VDC power to the transceiver.
Alignment Preparation & Precautions
A dummy load and inline wattmeter must be connected
to the main antenna jack in all procedures that call for
transmission, except where specified otherwise. Correct
alignment is not possible with an antenna. After completing one step, read the following step to determine whether the same test equipment will be required. If not, remove the test equipment (except dummy load and wattmeter, if connected) before proceeding.
Correct alignment requires that the ambient temperature
in the repair shop be the same as that of the transceiver
and test equipment, and that this temperature be held
constant between 68 °C and 86 °F (20 °C ~ 30 °C). When
the transceiver is brought into the shop from hot or cold
air it should be allowed some time for thermal equalization with the environment before alignment. If possible,
alignments should be made with oscillator shields and
circuit boards firmly affixed in place. Also, the test equipment must be thoroughly warmed up before beginning.
Notes: Signal levels in dB referred to in alignment are
based on 0 dBµ = 0.5 µV (closed circuit).
11
Alignment
Entering the Alignment mode
Alignment of the FT-8800R is performed using a front-panel
software-based procedure. To perform alignment of the transceiver, it must first be placed in the “Alignment Mode,” in which
the adjustments will be made and then stored into memory.
To enter the Alignment mode:
1. Press and hold in the “Left” band [V/M] key and the
Hyper Memory [6] key while turning the radio on.
Once the radio is on, release these two keys.
2. Press the front panel keys in the following sequence.
“Left” band [LOW] “Left” band [V/M]
“Left” band [HM] “Left” band [SCN]
“Right” band [LOW] “Right” band [V/M]
“Right” band [HM] “Right” band [SCN].
3. You will now note the appearance of “b-0 REF.xxH” on
the display, this signifies that the transceiver is now
in the “Alignment” mode.
PLL Reference Frequency
1. Press the “Sub” band DIAL knob momentarily, if
needed, to switch the “Main” band to be the “Right”
band.
2. Tune the “Right” band frequency to 435.050 MHz.
3. Press and hold in the in the “Left” DIAL knob, if
needed, to set the Alignment parameter to “b-0
REF.xxH.”
4. Press the PTT switch to activate the transmitter, and
adjust the “Left” DIAL knob, as needed, so that the
counter frequency reading is 435.050 MHz (±100 Hz).
5. Press the “Right” band [SCN] key.
6. Press and hold in the in the “Right” DIAL knob, if
needed, to set the Alignment parameter to “A-0
REF.xxH.”
7. Tune the “Left” band frequency to 435.050 MHz.
8. Connect the frequency counter fed through the 0.001
µF capactor to the TP1104.
9. Adjust the “Right” DIAL knob, as needed, so that the
counter frequency reading is 387.800 MHz (±100 Hz).
RF Front-end Tuning
1. Connect the DC voltmeter to TP1020 on the MAIN
Unit, then inject a 439.050 MHz signal at a level of +10
dBµ (with 1 kHz modulation @ ±3.5 kHz deviation)
from the RF Signal Generator.
2. Press the “Sub” band DIAL knob momentarily, if
needed, to switch the “Main” band to be the “Right”
band.
3. Tune the “Right” band frequency to 439.050 MHz.
4. Press and hold in the in the “Left” DIAL knob to set
the Alignment parameter to “b-1 TUN.xxH.”
5. Adjust the “Left” DIAL knob, as needed, so that the
DC voltmeter reading is 1.1 V.
6. Tune the “Right” band frequency to 145.050 MHz.
7. Inject a 145.050 MHz signal at a level of +10 dBµ (with
1 kHz modulation @ ±3.5 kHz deviation) from the RF
Signal Generator.
8. Adjust the “Left” DIAL knob, as needed, so that the
DC voltmeter reading is 1.2 V.
9. Press the “Right” band [SCN
10. Press and hold in the in the “Right” DIAL knob, if
needed, to set the Alignment parameter to “A-1
TUN.xxH.”
11. Connect the DC voltmeter to TP1023 on the MAIN
Unit.
12. Tune the “Left” band frequency to 439.050 MHz.
13. Inject a 439.050 MHz signal at a level of +10 dBµ (with
1 kHz modulation @ ±3.5 kHz deviation) from the RF
Signal Generator.
14. Adjust the “Right” DIAL knob, as needed, so that the
DC voltmeter reading is 1.1 V.
15. Tune the “Left” band frequency to 145.050 MHz.
16. Inject a 145.050 MHz signal at a level of +10 dBµ (with
1 kHz modulation @ ±3.5 kHz deviation) from the RF
Signal Generator.
17. Adjust the “Right” DIAL knob, as needed, so that the
DC voltmeter reading is 1.2 V.
] key.
12
TP1020
TP1023
MAIN UNIT TEST POINTS
Alignment
TX Power Output
1. Press the “Sub” band DIAL knob momentarily, if
needed, to switch the “Main” band to be the “Right”
band.
2. Tune the “Right” band frequency to 440.050 MHz, then
set the Transmit Power Level to “LOW.”
3. Press and hold in the in the “Left” DIAL knob to set
the Alignment parameter to “b-2 PWR.xxH.”
4. Press the PTT switch to activate the transmitter, and
adjust the “Left” DIAL knob, as needed, so that the
wattmeter reading is 5 Watts (±0.5 Watt).
5. Increase the Transmit Power Level to “MID2.”
6. Press the PTT switch to activate the transmitter, and
adjust the “Left” DIAL knob, as needed, so that the
wattmeter reading is 10 Watts (±0.5 Watt).
7. Increase the Transmit Power Level to “MID1.”
8. Press the PTT switch to activate the transmitter, and
adjust the “Left” DIAL knob, as needed, so that the
wattmeter reading is 20 Watts (±0.5 Watt).
9. Increase the Transmit Power Level to “HIGH.”
10. Press the PTT switch to activate the transmitter, and
adjust the “Left” DIAL knob, as needed, so that the
wattmeter reading is 35 Watts (±0.5 Watt).
11. Tune the “Right” band frequency to 146.050 MHz, then
set the Transmit Power Level to “LOW.”
12. Press the PTT switch to activate the transmitter, and
adjust the “Left” DIAL knob, as needed, so that the
wattmeter reading is 5 Watts (±0.5 Watt).
13. Increase the Transmit Power Level to “MID2.”
14. Press the PTT switch to activate the transmitter, and
adjust the “Left” DIAL knob, as needed, so that the
wattmeter reading is 10 Watts (±0.5 Watt).
15. Increase the Transmit Power Level to “MID1.”
16. Press the PTT switch to activate the transmitter, and
adjust the “Left” DIAL knob, as needed, so that the
wattmeter reading is 20 Watts (±0.5 Watt).
17. Increase the Transmit Power Level to “HIGH.”
18. Press the PTT switch to activate the transmitter, and
adjust the “Left” DIAL knob, as needed, so that the
wattmeter reading is 50 Watts (±0.5 Watt).
TX Deviation
1. Press the “Sub” band DIAL knob momentarily, if
needed, to switch the “Main” band to be the “Right”
band.
2. Tune the “Right” band frequency to 440.050 MHz, then
set the Transmit Power Level to “LOW.”
3. Press and hold in the in the “Left” DIAL knob to set
the Alignment parameter to “b-3 DEV.xxH.”
4. Inject a 1 kHz audio tone at a level of 80 mV from the
Audio Generator.
5. Press the PTT switch to activate the transmitter, and
adjust the “Left” DIAL knob, as needed, so that the
deviation meter reading is 4.5 kHz (±0.2 kHz) (USA
Version: 4.2 kHz (±0.2 kHz)).
6. Tune the “Right” band frequency to 146.050 MHz, then
set the Transmit Power Level to “LOW.”
7. Press the PTT switch to activate the transmitter, and
adjust the “Left” DIAL knob, as needed, so that the
deviation meter reading is 4.5 kHz (±0.2 kHz) (USA
Version: 4.2 kHz (±0.2 kHz)).
DCS Tx Deviation
1. Press the “Sub” band DIAL knob momentarily, if
needed, to switch the “Main” band to be the “Right”
band.
2. Press and hold in the in the “Left” DIAL knob to set
the Alignment parameter to “b-4 DCS.xxH.”
3. Tune the “Right” band frequency to 440.050 MHz, then
activate DCS with the 023 DCS code, and set the Transmit Power Level to “LOW.”
4. Press the PTT switch to activate the transmitter (with
no microphone input), and adjust the “Left” DIAL
knob, as needed, so that the deviation meter reading
is between 0.60 kHz and 0.80 kHz.
5. Tune the “Right” band frequency to 146.050 MHz, then
activate DCS with the 023 DCS code, and set the Transmit Power Level to “LOW.”
6. Press the PTT switch to activate the transmitter (with
no microphone input), adjust the “Left” DIAL knob,
as needed, so that the deviation meter reading is between 0.60 kHz and 0.80 kHz.
13
Alignment
CTCSS Tx Deviation
1. Press the “Sub” band DIAL knob momentarily, if
needed, to switch the “Main” band to be the “Right”
band.
2. Press and hold in the in the “Left” DIAL knob to set
the Alignment parameter to “b-5 CTC.xxH.”
3. Tune the “Right” band frequency to 440.050 MHz, then
activate the CTCSS Encoder with a 100 Hz tone, and
set the Transmit Power Level to “LOW.”
4. Press the PTT switch to activate the transmitter (with
no microphone input), and adjust the “Left” DIAL
knob, as needed, so that the deviation meter reading
is between 0.65 kHz and 0.75 kHz.
5. Tune the “Right” band frequency to 146.050 MHz, then
activate the CTCSS Encoder with a 100 Hz tone, and
set the Transmit Power Level to “LOW.”
6. Press the PTT switch to activate the transmitter (with
no microphone input), and adjust the “Left” DIAL
knob, as needed, so that the deviation meter reading
is between 0.65 kHz and 0.75 kHz.
Center Meter Sensitivity
1. Inject a 440.050 MHz signal at a level of 10 dBµ from
the RF Signal Generator.
2. Press the “Sub” band DIAL knob momentarily, if
needed, to switch the “Main” band to be the “Right”
band.
3. Tune the “Right” band frequency to 440.050 MHz.
4. Press and hold in the in the “Left” DIAL knob to set
the Alignment parameter to “b-6 CTRL/V.”
5. Press the “Left” band [LOW] key.
6. Press the “Right” band [SCN] key.
7. Tune the “Left” band frequency to 440.050 MHz.
8. Press and hold in the “Right” DIAL knob to set the
Alignment parameter to “A-6 CTRL/V.”
9. Inject a 440.050 MHz signal at a level of 10 dBµ from
the RF Signal Generator.
10. Press the “Left” band [LOW] key.
S-Meter Sensitivity
1. Inject a 440.050 MHz signal at a level of –5 dBµ from
the RF Signal Generator.
2. Press the “Sub” band DIAL knob momentarily, if
needed, to switch the “Main” band to be the “Right”
band.
3. Tune the “Right” band frequency to 440.050 MHz.
4. Press and hold in the in the “Left” DIAL knob to set
the Alignment parameter to “b-7 SM L/V.”
5. Press the “Left” band [LOW] key.
6. Increase the RF Signal Generator output level to +23
dBµ.
7. Press the “Left” band [V/M] key.
8. Tune the “Right” band frequency to 146.050 MHz.
9. Inject a 146.050 MHz signal at a level of –5 dBµ from
the RF Signal Generator.
10. Press the “Left” band [LOW] key.
11. Increase the RF Signal Generator output level to +23
dBµ.
12. Press the “Left” band [V/M] key.
13. Tune the “Right” band frequency to 230.050 MHz.
14. Inject a 230.050 MHz signal at a level of –5 dBµ from
the RF Signal Generator.
15. Press the “Left” band [LOW] key.
16. Increase the RF Signal Generator output level to +23
dBµ.
17. Press the “Left” band [V/M] key.
18. Tune the “Right” band frequency to 350.05 MHz.
19. Inject an 350.05 MHz signal at a level of –5 dBµ from
the RF Signal Generator.
20. Press the “Left” band [LOW] key.
21. Increase the RF Signal Generator output level to +23
dBµ.
22. Press the “Left” band [V/M] key.
23. Tune the “Right” band frequency to 850.05 MHz.
24. Inject an 850.05 MHz signal at a level of +3 dBµ from
the RF Signal Generator.
25. Press the “Left” band [LOW] key.
26. Increase the RF Signal Generator output level to +31
dBµ.
27. Press the “Left” band [V/M] key.
28. Press the “Right” band [SCN] key.
29. Tune the “Left” band frequency to 440.050 MHz.
30. Inject a 440.050 MHz signal at a level of –5 dBµ from
the RF Signal Generator.
31. Press and hold in the in the “Right” DIAL knob to set
the Alignment parameter to “a-7 SM L/V.”
32. Press the “Left” band [LOW] key.
33. Increase the RF Signal Generator output level to +23
dBµ.
34. Press the “Left” band [V/M] key.
35. Tune the “Left” band frequency to 146.050 MHz.
36. Inject a 146.050 MHz signal at a level of –5 dBµ from
the RF Signal Generator.
37. Press the “Left” band [LOW] key.
38. Increase the RF Signal Generator output level to +23
dBµ.
39. Press the “Left” band [V/M] key.
40. Tune the “Left” band frequency to 230.050 MHz.
41. Inject a 230.050 MHz signal at a level of –5 dBµ from
the RF Signal Generator.
42. Press the “Left” band [LOW] key.
43. Increase the RF Signal Generator output level to +23
dBµ.
44. Press the “Left” band [V/M] key.
45. Tune the “Left” band frequency to 350.05 MHz.
46. Inject an 350.05 MHz signal at a level of –5 dBµ from
the RF Signal Generator.
47. Press the “Left” band [LOW] key.
48. Increase the RF Signal Generator output level to +23
dBµ.
14
Alignment
49. Press the “Left” band [V/M] key.
50. Tune the “Left” band frequency to 850.05 MHz.
51. Inject an 850.05 MHz signal at a level of +3 dBµ from
the RF Signal Generator.
52. Press the “Left” band [LOW] key.
53. Increase the RF Signal Generator output level to +31
dBµ.
54. Press the “Left” band [V/M] key.
DC Voltmeter
1. Set the power supply voltage to 13.8 VDC.
2. Press and hold in the in the “Sub” band DIAL knob to
set the Alignment parameter to “b-8 BAT SC.”
3. Press the “Left” band [SCN] key.
To close the Alignment mode, just press and hold in the
“Right” VOL knob for 2 seconds (to turn the power off).
The next time the transceiver is turned on, normal operation may resume.
15
Note:
16
Circuit Diagram
[
-1.4 dBu
0.80 V
0.96 V
(
-4.3 dBu
(
+4.0 dBu
]
[
+3.0 dBu
)
)
]
[
+2.7 dBu
]
(
+18.4 dBu
0.34 V
(
+18.3 dBu
)
1.36 V
)
[
+17.2 dBu
0.29 V
[
+16.9 dBu
0.33 V
0.29 V
MAIN Unit
2.20 V
0.61 V
47.25 MHz
(
+15.0 dBu
[
+14.9 dBu
2.20 V
0.61 V
45.05 MHz
(
+15.3 dBu
[
+14.8 dBu
2.23 V
0.21 V
)
]
2.23 V
]
0.83 V
)
]
1.05 V
1.36 V
AM 1.97 V
PK-B 2.27 V
AM 3.33 V
0 V
AM 3.53 V
PK-A 2.39 V
0.95 V
0.90 V
1.05 V
AM 3.16 V
PK-A 1.39 V
PK-B 1.48 V
1.89 V
1.91 V
1.89 V
1.91 V
PK-A 1.42 V
PK-B 1.50 V
PK-A 2.32 V
0.97 V
0.91 V
PK-B 2.41 V
1.89 V
1.75 V
1.73 V
1.91 V
AF VR-B:0~4.7 V
3.22 V
3.58 V
8.41 V
3.58 V
3.22 V
13.78 V
13.56 V
AF VR-A:0~4.7 V
1.35 V
1.28 V
13.00 V
6.47 V
8.85 V
0.52 V
0.12 V
0.79 V
0.21 V
0.83 V
0.79 V
0.20 V
0.12 V
0.79 V
0.79 V
0.70 V
0.69 V
4.97 V
4.97 V
4.78 V
4.77 V
45.05 MHz
(
+27.5 dBu
[
+26.9 dBu
Wide:
1.73 V
Narrow:
2.09 V
AM 4.52 V
AM 4.52 V
Wide:1.71 V
Narrow:2.05 V
)
]
Narrow:2.76 V
47.25 MHz
(
+26.8 dBu
[
+26.9 dBu
4.81 V
Wide:
2.40 V
)
]
4.81 V
Wide:
2.38 V
Narrow:2.73 V
0.65 V
4.84 V
0.65 V
4.84 V
4.84 V
Wide:
2.40 V
Narrow:2.76 V
4.84 V
Wide:
2.38 V
Narrow:
2.73 V
Wide:1.71 V
Narrow:2.05 V
Wide:1.73 V
Narrow:2.09 V
Narrow:
4.81 V
Narrow:4.88 V
1.35 V
AM 1.95 V
Wide:4.13 V
Wide:4.11 V
0 V
AM 3.70 V
45.05 MHz
(
)
+25.3 dBu
[
]
[
]
+13.4 dBu
)
1.54 V
1.55 V
[
+11.7 dBu
0.42 V
0.41 V
1.5 V
0.37 V
]
1.50 V
5.84 V
5.56 V
]
8.56 V
0.63 V
8.55 V
]
8.27 V
8.57 V
8.11 V
8.12 V
8.11 V
4.96 V
0.64 V
3.09 V
1.09 V
4.78 V
1.15 V 0.49 V
4.01 V
0.97 V (+16.5 dBu
0.96 V
(
)
+16.7 dBu
+24.3 dBu
1.20 V
47.25 MHz
(
+23.7 dBu) [+23.6 dBu
1.20 V
(
-8.5 dBu
[
-9.3 dBu
0.68 V
4.67 V
0.33 V
8.14 V
0.31 V
0.75 V
)
]
7.78 V
0.68 V
8.71 V
0.68 V
8.73 V
0.68 V
0.66 V
4.68 V
0.66 V
3.22 V
2.80 V
2.80 V
4.70 V
8.68 V
8.81 V
1.81 V
8.82 V 8.87 V 8.86 V 8.85 V 8.86 V 8.86 V 8.82 V 8.86 V
8.72 V
4.78 V 4.92 V 4.83 V 4.92 V 4.93 V 4.83 V
1.81 V
4.87 V
1.78 V
8.81 V
4.99 V
5.64 V
5.53 V
8.95 V
5.01 V
1.81 V
13.10 V
FAN on:4.14 V
off:0 V
13.78 V
13.06 V
FAN on:11.98 V
off:13.78 V
FAN on:0.18 V
off:13.53 V
13.80 V
(
12.68V
[
12.80 V
6.64 V
)
]
4.78 V
(
11.68V
[
11.66 V
(
)
3.52V
[
]
3.32 V
(
)
12.80V
[
]
12.88 V
4.70 V
(
)
2.95V
[
]
3.66 V
6.64 V
)
]
7.12 V
0.57 V
4.91 V
4.94 V
4.28 V
0.69 V
0.12 V
4.49 V
4.92 V
( ) : 145.050 MHz
[ ] : 433.05 MHz
17
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