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Kenwood Service Bulletins
AT-50
AT-50 BLOWS ACCESSORY FUSE IN TS-50
AT-50
BLOWS ACCY FUSE IN TS-50
more
AT-50
MECHANICAL STABILITY OF CASE
AT-930
SERVICE NOTES
MORE
BS-5
SM-220/BS-5 SWEEP INTERFERENCE
BS-8
ALIGNMENT WITH TS-180S/SM220
MORE
DG-1
SERVICE NOTE / BAD SOLDER JOINTS
DG-1
SERVICE NOTES (PC BOARD SOLDER)
MORE
DG-5
REPAIR OF RCA PLUGS/JACKS
DG-5
REPAIR NOTES
MORE
DG-5
THEORY OF OPERATION
MORE
DG-5
SERVICE NOTES (PC BOARD SOLDER)
MORE
DG-5
USE WITH TS-511/TS-900/T/R-599
MORE
MORE
DK-520
USE WITH TS-511/TS-900/T/R-599
MORE
MORE
DRU-2 ERRATIC
PLAYBACK/MEMORY LOSS
MORE
DS-2
REPLACEMENT FOR DS-1A IN TS820/TS520
DSP-100
6 PIN CABLE CHANGE
HMC-1
NOT TO BE USED WITH TH-205AT/TH-215A
MC-44DM
INTERMITTENT AUDIO
MC-44DM
INCREASE IN AUDIO LEVEL
MC-45
MODIFICATION FOR USE WITH TR-7400A
MORE
MC-46
DTMF OPERATION WITH OLDER EQUIPMENT
MC-48
MIC ELEMENT CHANGE /INSTALLATION
MC-55
CHANGE IN MIC ELEMENT (T91-0328-08)
QR-666
VFO STABILITY IN SWL RECEIVER
PB-2/PB-12
BATTERY CURRENT LIMITING RESISTOR FAILURE
PS-430
VOLTAGE INCREASE WITH TH-205/215
MORE
PS-50
AVR FAILURE /IMPROVED SURGE PROTECTION
R-599A/D
SERVICE NOTES
R-599A/D
REMOVING CB BAND
R-1000
AGC, AM BANDWIDTH CHANGES
MORE
R-1000
RF ATTENUATOR 10 DB STEP OPTION
R-1000
MUTING OPERATION - OPS MANUAL UPDATE
R-5000
NO FREQUENCY CHANGE THROUGH COMPUTER
RC-10
HANG UP TIME/TIMEOUT TIMER SETTINGS/XBAND RPT
MORE
RC-10
ALTERNATOR NOISE IN MIC CIRCUIT
RM-76
FREQUENCY ERROR WITH TR-7600/7625
RM-76
BATTERY BACK-UP POWER
RM-76
MICROPROCESSOR FAILURE
SM-220
ALIGNMENT WITH TS-180S/SM220
MORE
SM-220
SM-220/BS-5 SWEEP INTERFERENCE
SM-220
SHIELD INSTALLATION/SWEEP INTERFERENCE
SM-220
FEEDBACK FROM BS-8
SM-230
BANDSCOPE ATTENUATION MOD
MORE
SM-230
RTTY CROSS PATTERN MODIFICATION
SMC-25
MODIFICATION FOR USE WITH THE TR-2400
MORE
SMC-34
DISTORTED/MUFFLED AUDIO
MORE
T-599A/D
SERVICE NOTES
T-599D
REDUCING 120HZ HUM
TH-22AT
MEMORY LOSS WHEN BATTERY RUNS DOWN
TH-25A
TSU-6 ERRATIC TONE ALERT FUNCTION
TH-25A
DISABLE AUTOMATIC POWER OFF FUNCTION
MORE
TH-25AT
KEYPAD OVERLAY REPLACEMENT
TH-26A
INTERNAL BIRDIES
MORE
MORE
TH-27A
LOW TX POWER WITH TOSHIBA MODULES
TH-28A
DIFFICULT BATT. INSERTION
TH-28A
CTCSS TONE ERROR - 131.8,136.5,173.8 HZ
TH-42AT
MEMORY LOSS WHEN BATTERY RUNS DOWN
TH-45A
TSU-6 ERRATIC TONE ALERT FUNCTION
TH-45A
DISABLE AUTOMATIC POWER OFF FUNCTION
MORE
TH-45AT
KEYPAD OVERLAY REPLACEMENT
TH-48A
DIFFICULT BATT. INSERTION
TH-48A
CTCSS TONE ERROR - 131.8,136.5,173.8 HZ
TH-48A
MICRO CHANGE - DISABLE 800 MHZ RECEIVE
TH-75A
INTERMITTENT MEMORY LOSS
MORE
MORE
MORE
MORE
TH-75A
NO TX ON VHF WHEN IN VEHICLE
TH-77A
MEMORY LOSS WITH LOW BATTERY VOLTAGE
MORE
TH-78A
CLONE FAILURE W/ME-1
MORE
TH-78A
LEFT ENCODER INOPERATIVE
TH-78A
CALL CH. TONE FREQ PROBLEM WITH TSU-7
TH-78A
DIFFICULT BATT. INSERTION
TH-78A
MICRO CHANGE - DISABLE 800 MHZ RECEIVE
TH-78A
IMD IMPROVEMENT
MORE
TH-205A
PROTECTION FUSE REPLACEMENT WITH DIODE
TH-205A
VOLUME/SQUELCH CONTROL IMPROVEMENTS/BRACKET
MORE
TH-205A
RCV SIGNAL TO NOISE RATIO IMPROVEMENTS
MORE
TH-205A
NEW PTT KNOB INSTALLATION
TH-215A
PROTECTION FUSE REPLACEMENT WITH DIODE
TH-215A
VOLUME/SQUELCH CONTROL IMPROVEMENTS/BRACKET
MORE
TH-215A
TX SIGNAL TO NOISE RATIO IMPROVEMENT
MORE
TH-215A
NEW PTT KNOB INSTALLATION
TH-315A
NEW PTT KNOB INSTALLATION
TH-415A
VOLUME/SQUELCH CONTROL IMPROVEMENTS/BRACKET
MORE
TH-415A
TX SIGNAL TO NOISE RATIO IMPROVEMENT
MORE
TH-415A
NEW PTT KNOB INSTALLATION
TM-201
INCREASED TX AUDIO / MIC GAIN
TM-221A
NO TX IN HIGH POWER DUE TO VOLTAGE DROP
TM-221A
FINAL MODULE/LOW POWER OUTPUT HINTS
TM-231A
INTERMITTENT MEMORY LOSS
MORE
TM-321A
LOSS OF TX AUDIO WITH MC-48B
TM-401
INCREASED TX AUDIO / MIC GAIN
TM-411
MICRO CHANGE - DISABLE 800 MHZ RECEIVE
TM-455A
CHANGE IN PIN DIODE
TM-531A
20 MHZ OFFSET MODIFICATION
MORE
TM-631A
MEMORY LOSS
MORE
MORE
MORE
MORE
MORE
MORE
MORE
MORE
TM-631A
144MHZ FINAL BOARD CHANGE
TM-642A
MICRO CHANGE - DISBALE 800 MHZ RECEIVE
TM-642A
MICRO CHANGE - SUPERCEDES ASB-1033
TM-701A
INTERMITTENT MEMORY LOSS
MORE
TM-721A
MICROCOMPUTER LOCK-UP
MORE
TM-721A
LOW/NO VHF TRANSMIT POWER
TM-721A
S-METER DEFLECTION DUE TO PULSE NOISE
MORE
TM-721A
AF PA WHITE NOISE WITH UNIT SQULCHED
MORE
MORE
TM-731A
MEMORY LOSS
MORE
MORE
MORE
MORE
MORE
MORE
MORE
MORE
MORE
TM-731A
144MHZ FINAL BOARD CHANGE
MORE
TM-732A
440 RECEIVE INTERFERENCE FROM 2 METER XMIT
TM-732A
CHANGE IN VALUE OF CHIP FUSE
TM-732A
LOW CROSS-BAND REPEAT AUDIO
MORE
TM-732A
NOISE AT SQULECH ON/OFF ON OTHER BAND
TM-732A
S-METER SQUELCH SCAN IMPROVEMENT
TM-732A
CONTROL PCB FOIL DAMAGE
TM-732A
PROT OF Q201 (FIRST RF AMP) 440 SIDE
TM-732A
APC CIRCUIT MODIFICATION
MORE
TM-733A
PL TONE DISTORTION/AUDIBLE
MORE
TM-733A
PL TONE BLEED THRU TO SPEAKER
MORE
TM-742A
28MHZ/50MHZ R/C XMIT FAILURE
TM-742A
MICRO LOCKUP WHEN IN REMOTE OPERATION
TM-742A
MICRO CHANGE - DISBALE 800 MHZ RECEIVE
TM-742A
MICRO CHANGE - SUPERCEDES ASB-1033
TM-941A
BPF ALIGNMENT TOOL
TM-942A
28MHZ/50MHZ R/C XMIT FAILURE
TM-942A
MICRO LOCKUP WHEN IN REMOTE OPERATION
TM-942A
MICRO CHANGE - DISBALE 800 MHZ RECEIVE
TM-2550 DCL
CALL SIGN DATA LOSS
TM-2570
LOW TX POWER OUTPUT WITH GOOD VSWR
TM-3530A
NOISY TRANSMIT AFTER WARMUP
MORE
TR-2200A ANTENNA
ADAPTER
TR-2200A
SERVICE NOTES
TR-2400
TONE ENCODER RFI/MOTORBOATING
TR-2400
OPTIONAL CHARGE INPUT PROTECTION
TR-2400
OFFSET FAILURE
TR-2400
UNWANTED NOISE: TONE OR BURST AT TX
TR-2400
DISPLAY OR KEYBOARD TROUBLE
TR-2400
RX LOW, INTERMITTENT, OR DISTORTED
TR-2400
PLL UNLOCK / LOW CRYSTAL ACTIVITY
TR-2400
PULSE NOISE IN RECEIVE OR TRANSMIT
TR-2400
SCRATCHY TX AUDIO
TR-2400
VOLUME CONTROL REPLACEMENT - PRECAUTIONS
TR-2400
BATTERY CHARGER FAILURE / REPAIR
TR-2400
EXCESSIVE BACKGROUND NOISE ON XMIT
TR-2500
RX IMD IMPROVEMENT
TR-2600A
PLL UNLOCK (TROUBLESHOOTING)
TR-2600A
PLL UNLOCK CAUSED BY OSC FAILURE
TR-7200A
SERVICE NOTES
TR-7400A
FINAL UNIT ARCING
TR-7400A
VARIOUS SERVICE NOTES
TR-7400A
CHANGES IN PD UNIT OF IC'S
TR-7400A
METER LAMP LONGER LIFE
TR-7400A
MODIFICATION FOR USE WITH TR-7400A
TR-7600
ALTERNATOR WHINE
TR-7600
AUDIO TONE ON TX
TR-7600
OPTIONAL CERAMIC FILTER
TR-7600
RF POWER MODULE RETURNS (OBSOLETE)
TR-7600
MEMORY BATTERY BACK-UP
TR-7625
ALTERNATOR WHINE
TR-7625
AUDIO TONE ON TX
TR-7625
OPTIONAL CERAMIC FILTER
TR-7625
RF POWER MODULE RETURNS (OBSOLETE)
TR-7625
INTERMITTENT TX
TR-7625
MEMORY BATTERY BACK-UP
TR-7625
FINAL MODULE REPLACEMENT (USE SB-826)
TR-7625
HYBRID AMPLIFIER MODULE SUBSTITUTION
TR-7730
TRANSMITTER FREQUENCY RESPONSE VOICE AND DTMF
TR-7800
TONE PAD CONVERSION FOR 4TH COLUMN (ABCD)
TR-7800
INTERMITTANT LOSS OF MEMORY
TR-7800
OPTIONAL FILTERS TO IMPROVE SELECTIVITY
TR-7800
PULSE NOISE AND SPKR BUZZ DURING XMIT
TR-7800
DISPLAY FAILURE CAUSED BY FAILURE OF CLOCK
TR-7800
CONTINUOUS CHARGE FOR INTERNAL BATTERIES
TR-7800
MEMORY CH. 7 INDICATOR ERRATIC
TR-7800
MEMORY RETENTION IMPROVEMENTS
TR-7850
RF LED METER DISPLAYS LOW READING
TR-7850
MEMORY CH. 7 INDICATOR ERRATIC
TR-7850
MEMORY RETENTION IMPROVEMENTS
TR-7930
RX INTERFERENCE FROM FM/TV BROADCAST
TR-7950
RX INTERFERENCE FROM FM/TV BROADCAST
TR-8300
RECIEVER/TRANSMITTER ALIGNMENT
TR-8400
SUB-AUDIBLE ENCODER INSTALLATION
TR-8400
RX INTERNAL SPURIOUS SIGNALS
TR-8400
TRANSMITTER FREQUENCY RESPONSE VOICE AND DTMF
TR-8400
TRANSMIT/RECEIVE SWITCH TIME / PLL LOCKUP
TR-9000
CW/SSB TX INSTABILITY / FM'ING / CHIRP ON CW
TR-9000
TX PULSE NOISE IN SSB TRANSMISSION
TR-9000
OPTIONAL FILTERS TO IMPROVE SELECTIVITY
TR-9000
STABILITY IMPROVEMENT / PLL UNLOCK
TR-9000
XMIT SIDEBAND DISTORTION / CARRIER BALANCE
TR-9130
LOW DRIVE LEVEL / LOW OUTPUT POWER
TS-50S
LITHIUM BATT. REPLACMENT CAUTION
MORE
TS-50S
"HELLO" DISPLAYED DURING TRANSMIT
TS-50S
ANTENNA LEAD WIRE CONNECTION
TS-50S
MECHANICAL NOISE FROM FINAL UNIT
TS-120S
VOX OPERATION PICK-UP TIME
TS-120S
FINAL TRANSISTOR REPLACEMENT
TS-120S
ANTENNA INPUT TRANSFORMER REPLACEMENT
TS-120S
PHONE PATCH TERMINAL ADDITION
TS-120S
HUM IN SSB TX
TS-120S
FINAL PROTECTION
TS-120S
REPAIR NOTES
TS-120S
FULL CW OUTPUT IN SSB MODE (USE SB-944)
TS-120S
TX OSCILLATION (USE SB-844)
TS-120S
BAND PASS FILTER CHANGE - IMPROVE SELECTIVITY
TS-120S
TX OSCILLATION (SEE ASB-844)
TS-120S
VFO INSTABILITY AND DRIFT
TS-120S
ANT INPUT TRANSFORMER REPLACEMENT
TS-120S
FULL CW OUTPUT IN SSB MODE
TS-120S
TX OSCILLATION ESPECIALLY ON 10-15-20 METERS
TS-140S
INTERMITTENT LOSS OF TRANSMIT POWER
TS-140S
MOMENTARY TRANSMISSION WHEN VOX IS TURNED ON
MORE
TS-180S
ALIGNMENT WITH TS-180S/SM220
TS-180S
IF #2 OUTPUT LEVEL FOR SM220 OPERATION
TS-180S
PHONE PATCH TERMINAL ADDITION
TS-180S
INCREASE OF RX AUDIO OUTPUT
TS-180S
HUM WITH PS-30/ERRATIC DFC
TS-180S
ALC LOSS OR REDUCTION ON 40 METERS
TS-180S
DFC/HUM/INTERMITTANT FREQ STABILITY
TS-180S
TROUBLE SHEET/REPAIR NOTES
TS-180S
DFC INSTABILITY
TS-180S
CW DELAED KEYING DURING CW VOX OPERATION
TS-180S
LINEAR AMPLIFIER OPERATION / SWITCHING TIMES
TS-180S
VFO INSTABILITY / DRIFT IMPROVEMENT
TS-180S
ALC LEVEL IMPROVEMENT / LPF CHANGES
TS-430S
500 KHZ HETERODYNE
TS-430S
NOTCH CONTROL/BETTER ADJUSTMENT
TS-430S
AM WIDE/NARROW FILTER SELECTION
MORE
MORE
MORE
MORE
MORE
TS-430S
INTERNAL BEAT AT 28.415 & 21.526
TS-430S
NOISE BLANKER IMPROVEMENTS
TS-430S
INTERMITTENT PLL UNLOCK IN FM/AM
TS-430S
DELETED, SUPERCEDED BY #0895
TS-430S
PLL UNLOCK AT HIGH TEMPERATURE
TS-430S
LOW/INTERMITTENT RX / LPF RELAYS
MORE
MORE
TS-440S
OPERATION WITH THE MC-85
MORE
TS-440S
NOTCH FILTER LOW FREQUENCY IMPROVEMENTS
MORE
TS-440S
PROTECTING Q33 FROM SHORT ON REMOTE PLUG
MORE
TS-440S
CASE SCREWS BINDING IN THE HEAT SINK
TS-440S
INTERMITTENT OPERATION/ROM SOCKET
MORE
TS-440S
PLL UNLOCK IN VCO'S DUE TO GLUE
MORE
TS-440S
PLL UNLOCK / PLL #1
MORE
TS-440S
S/M ALIGNMENT PROCEDURE UPDATES
TS-450S
DISTORTED TX AUDIO WITH PACKET TERMINAL
TS-450S
CALIBRATION CABLE CHANGE
TS-450S
DISTORTED TX WITH PACKET TERMINAL
MORE
TS-450S
POOR TRANSMIT AUDIO FREQUENCY RESPONSE
TS-450S
LOW MIC GAIN W/DSP-100
TS-450S
PARTS CHANGES FOR DRIVER TRANSISTORS
TS-450S
CHANGE OF NOISY ENCODER
TS-520
NOVICE OPERATION - 75 WATTS
TS-520
AM BROADCAST INTERFERENCE
TS-520
SERVICE NOTES
TS-520
SM-220/BS-5 SWEEP INTERFERENCE
TS-520
IF OUT FOR SM-220
TS-520
REPLACEMENT FOR DS-1A IN TS820/TS520
TS-520S
-6VDC SUPPLY FAILURE
TS-520S
CW FREQUENCY SHIFT
TS-520S
CW FILTER SELECT CONTROL
TS-530S
LOW VOLTAGE SUPPLY / OPTIONAL IMPROVEMENTS
TS-530S
IF UNIT Q2, Q7 PROTECTION
TS-660
MICROPROCESSOR LATCH-UP
TS-690S
CALIBRATION CABLE CHANGE
TS-690S
DISTORTED TX AUDIO WITH PACKET TERMINAL
TS-690S
DISTORTED TX WITH PACKET TERMINAL
MORE
TS-690S
LOW MIC GAIN W/DSP-100
TS-700A
REPEATER OPERATION MODIFICATION (EUROPE)
TS-700A
SERVICE NOTES
TS-700A
9 VOLT REGULATOR REPLACEMENT
TS-820
AUX BAND INSTALLATION (RX ONLY)
TS-820
RIT MODIFICATION
TS-820
MICROPHONE INPUT ATTENUATOR
TS-820
REPLACEMENT FOR DS-1A IN TS820/TS520
TS-820S
SERVICE NOTES
TS-820S
GENERAL ALIGNMENT PROCEDURE
TS-820S
SPEECH PROCESSOR ALIGNMENT
TS-820S
CW FILTER SELECT CONTROL
TS-820S
TA7201P SUBSTITUTION PARTS KIT
TS-830S
OPERATION ON 240V AC
TS-830S
INTERMITTENT FREQUENCY SHIFT
TS-830S
LOW VOLTAGE SUPPLY DRIFT/IMPROVEMENTS
TS-830S
NOISE BLANKER IMPROVEMENTS / CROSS MODULATION
TS-830S
TRANSMITTER "TALKBACK" FROM RF INTRUSION
TS-850S
DISTORTED TX WITH PACKET TERMINAL
TS-850S
LOW OR NO RECEIVE SENSITIVITY/NO AUDIO
TS-850S
NO AUDIO FROM VS-2
TS-850S
S METER ADJUSTMENT
TS-850S
CLICK NOISE WITH NOTCH ON
TS-930S
INCORRECT LINE VOLTAGE SETTING
TS-930S
CW HETERODYNE TONE WITH VBT CONTROL
TS-930S
SSB TX AUDIO TONE QUALITY SN < 3080001
TS-930S
LOSS OF RX SENSITIVITY
TS-930S
PLL UNLOCK / BLANK DISPLAY
TS-930S
CW PITCH TONE SHIFT WHEN MONI SWITCH IS ON
TS-930S
CW VBT - SIMPLIFIED ALIGNMENT
TS-930S
RF FEEDBACK WHEN USING EXTERNAL SPEAKER
TS-930S
RX AUDIO OSCILLATION
TS-930S
RF FEEDBACK INTO MIC CIRCUIT
TS-930S
ALC LEVEL DRIFT AT 28 MHZ
TS-930S
POWER SUPPLY SURGE PROTECTION
TS-930S
15 MTR INTERNAL BEAT NOTE
TS-930S
INTERMITTENT TX POWER OUTPUT
TS-930S
NOISY POWER SUPPLY FAN
TS-940S
LCD CLOCK DISPLAY ERRATIC OPERATION
TS-940S
PLL UNLOCK
TS-940S
ANTENNA TUNER RELAY DAMAGE / MODIFICATION
MORE
TS-940S
PLL UNLOCK DUE TO LOW LEVELS
TS-940S
AVR UNIT CAPACITOR CHANGE / FAILURE
TS-940S
AGC CIRCUIT IMPROVEMENTS
MORE
TS-940S
TRANSMITTER HUM IN SSB
MORE
TS-940S
SIGNAL TO NOISE RATIO IMPROVEMENT WITH NB
TS-940S
VCO/CARRIER TO NOISE RATIO IMPROVEMENTS
MORE
MORE
TS-940S
SQUELCH SWITCHING NOISE SN < 711XXXX
MORE
TS-940S
SSB TALK POWER IMPROVEMENT S/N 601XXX-708XXX
MORE
TS-940S
ERRATIC DISPLAY (REMOVE THE ROM SOCKET)
MORE
TS-940S
MRF-485 DRIVER TRANSISTOR CHANGES (BLUE DOT)
MORE
TS-950
HUM WITH MONITOR ON S/N < 1060XXX |
