KENWOOD SERVICE BULLETINS BY NUMBER                    11/21/89


SB #      MODEL               TITLE

1                             (OBSOLETE)
2         TS-520              NOVICE OPERATION - 75 WATTS
3         QR-666              VFO STABILITY
4         TS-520              AM BROADCAST INTERFERENCE
5         TS-700A             REPEATER MODIFICATION (EUROPE)
6         T-599D              CHAIN DRIVE MODIFICATION
7         T-599A/D            SERVICE NOTES
8         R-599A/D            SERVICE NOTES
9         TS-820S             SPEECH PROCESSOR ALIGNMENT
10        TR-7400A            FINAL UNIT ARCING
11        TR-2200A            ANTENNA ADAPTER
12        TS-820              AUX BAND INSTALLATION (RX ONLY)
13        TS-820              RIT MODIFICATION
14        TS-820              MICROPHONE INPUT ATTENUATOR
15        VOX-3               SENSITIVITY AND DELAY
16        TR-8300             ALIGNMENT
17        T-599D              REDUCING 120HZ HUM
18        TR-7400A            SERVICE NOTES
19        DG-1                NEW DISPLAY TUBE
20        TS-700A             SERVICE NOTES
21        TS-520              SERVICE NOTES
22        TR-2200A            SERVICE NOTES
23        TR-7200A            SERVICE NOTES
24        TS-820S             SERVICE NOTES
25        DG-5                REPAIR
26        DG-1                SERVICE NOTES
27        TS-700A             9 VOLT REGULATOR REPLACEMENT
28        DG-5                REPAIR NOTES
29        DG-5                THEORY OF OPERATION
30        TS-820S             GENERAL ALIGNMENT PROCEDURE
31        R-599A/D            REMOVING CB BAND
32        TR-7400A            CHANGES IN PD UNIT
33        RM-76               FREQUENCY ERROR WITH TR-7600/7625
34        TR-7400A            METER LAMP LONGER LIFE
35        MC-45               MODIFICATION FOR USE WITH TR-7400A
36        TS-180S             DFC HUM WITH PS-30
37        TS-120S             VOX OPERATION PICK-UP TIME
38        TS-120S             FINAL TRANSISTOR REPLACEMENT
39        TR-7600/7625        ALTERNATOR WHINE
40        TS-120S             ANTENNA INPUT TRANSFORMER REPLACEMENT
41        BS-8                ALIGNMENT WITH TS-180S
42        TS-180S             IF #2 OUTPUT LEVEL CHANGE
43        TS-520S             -6VDC SUPPLY FAILURE
44        TS-120S/180S        PHONE PATCH TERMINAL ADDITION
45        TR-7600/7625        AUDIO TONE ON TX
46        TS-520 (S)          CW FREQUENCY SHIFT
47        TS-180S             INCREASE OF RX AUDIO OUTPUT
48        TS-120S             HUM IN SSB TX
49        UHF/VHF             OPTIONAL FILTER LIST
50        TR-7600/7625        OPTIONAL CERAMIC FILTER
51        TS-120S             FINAL PROTECTION
52        TS-520 (S)          BS-5 SWEEP INTERFERENCE
53        DG-1                STANDARD SERVICE
54        DG-5                STANDARD SERVICE
55        TS-180S             LOW 40 MTR ALC
56        TS-180S             DFC
57        SM-220              SHIELD INSTALLATION
58        TR-2400             TONE ENCODER RFI
59        RM-76               BATTERY BACK-UP POWER
60        TS-120S             REPAIR NOTES
61        TS-180S             TROUBLE SHEET
62        DK-520/DG-5         USE WITH TS-511/TS-900/T/R-599
63        TS-520              IF OUT FOR SM-220
64        TS-120S             FULL CW OUTPUT IN SSB MODE (USE SB-944)
65        TR-7600/7625        RF POWER MODULE RETURNS (OBSOLETE)
66        SM-220              FEEDBACK FROM BS-8
67        TS-180S             DFC INSTABILITY
801       TS-120S             TX OSCILLATION (USE SB-844)
802       RM-76               MICROPROCESSOR FAILURE
803       TS-180S             CW DELAY DURING VOX MEMORY OPERATION
804       TR-7625             INTERMITTENT TX
805       R-1000              MUTING
806       TR-7600/7625        MEMORY BATTERY BACK-UP
807       TR-2400             OPTIONAL CHARGE INPUT PROTECTION
808       TR-2400             OFFSET FAILURE
809       TR-2400             UNWANTED NOISE: TONE OR BURST AT TX
810       TR-2400             DISPLAY OR KEYBOARD TROUBLE
811       TR-2400             RX LOW, INTERMITTENT, OR DISTORTED
812       TS-520/820          CW FILTER SELECT CONTROL
813       R-1000              AGC, AM BANDWIDTH CHANGES
814       TR-2400             UNLOCK
815       TR-2400             PULSE NOISE
816       TS-120S             BAND PASS FILTER CHANGE
817       TS-180S             USE WITH A LINEAR AMPLIFIER
818       TR-2400             SCRATCHY TX
819       TR-2400             VOLUME CONTROL REPLACEMENT
820       TR-7625             FINAL MODULE REPLACEMENT
821       TS-120S             TX OSCILLATION (USE SB-844)
822       TR-2400             BATTERY CHARGER FAILURE
823       R-1000              RF ATTENUATOR 10 DB STEP OPTION
824       TR-9000             CW/SSB TX INSTABILITY
825       TR-9000             TX PULSE NOISE IN SSB
826       TR-7625             HYBRID AMPLIFIER MODULE SUBSTITUTION
827       TS-120S             VFO STABILITY
828       TR-7800             TONE PAD CONVERSION FOR 4TH COLUMN           
                              FUNCTION
829       TR-7800             LOSS OF MEMORY
830       TR-2400             TX NOISE
831       TS-120S             ANTENNA INPUT TRANSFORMER REPLACEMENT
832       TS-120S             FULL CW OUTPUT IN SSB MODE (USE SB-844)
833       TR-7800/9000        OPTIONAL CERAMIC FILTERS
834       TR-7800             PULSE NOISE
836       TR-7800             OPTIONAL CONTINUOUS CHARGE FOR INTERNAL      
                              BATTERY
837       TS-830S             OPERATION ON 240V AC
838       VFO-230             OPERATION ON 240V AC
839       TS-180S             VFO STABILITY
840       TS-830S             FREQUENCY SHIFT
841       TR-7800             CLOCK AND DISPLAY FAILURE
842       DS-2                REPLACEMENT FOR DS-1A
843       TR-8400             SUB-AUDIBLE ENCODER INSTALLATION
844       TS-120S             TX OSCILLATION
845       TR-8400             RX INTERNAL SPURIOUS SIGNALS
846       TR-7850             RF LED METER (LOW READINGS)
847       TS-830S             LOW VOLTAGE SUPPLY OPTIONAL IMPROVEMENTS
848       TS-530S             LOW VOLTAGE SUPPLY OPTIONAL IMPROVEMENTS
849       TR-9000             TRANSMITTER SIDEBAND CARRIER BALANCE
850       TS-180S             LOW PASS FILTER OPTIONAL CHANGES
851       TS-830S             NOISE BLANKER OPTIONAL IMPROVEMENTS
852       MC-46               DTMF OPERATION WITH OLDER EQUIPMENT
853       TR-8400             TRANSMITTER FREQUENCY RESPONSE VOICE OR      
                              DTMF
854       TR-7730             TRANSMITTER FREQUENCY RESPONSE VOICE OR      
                              DTMF
855       TR-8400             TRANSMIT DELAY TIME
856       TS-660              MICROPROCESSOR LATCH-UP
857       TS-830S             TRANSMITTER "TALKBACK"
858       TR-2500             RX IMD IMPROVEMENT
859       TR-9000             TEMPERATURE STABILITY IMPROVEMENT
860       TR-7800/7850        MEMORY CH. 7 INDICATOR ERRATIC
861       TR-7800/7850        MEMORY IMPROVEMENTS
862       VFO-120             DIAL LAMP SWITCHING CIRCUIT
863       TS-930S             INCORRECT LINE VOLTAGE SETTING (OBSOLETE)
864       SMC-25              MODIFICATION FOR USE WITH THE TR-2400
865       TS-430S             500KHZ HETERODYNE
866       TS-930S             CW HETERODYNE TONE
867       TS-930S             SSB TX TONE QUALITY
868       TS-930S             LOW RX SENSITIVITY
869       TS-930S             PLL UNLOCK
870       TR-7930/7950        RX INTERFERENCE
871       TR-9130             LOW DRIVE LEVEL
872       TS-930S             CW PITCH TONE SHIFT
873       TS-930S             CW VBT
874       TS-930S             RF FEEDBACK
875       TS-930S             RX AUDIO OSCILLATION
876       TS-930S             RF FEEDBACK INTO MIC CIRCUIT
877       AT-930              SERVICE NOTES
878       TS-530S             IF UNIT Q2, Q7 PROTECTION
879       TS-930S             INCREASED TX AUDIO
880       TM-201/401          INCREASED TX AUDIO
881       TS-930S             POWER SUPPLY SURGE PROTECTION
882       TS-430S             NOTCH CONTROL
883       TS-430S             AM WIDE/NARROW FILTER SELECTION
884       TS-930S             15 MTR INTERNAL BEAT NOTE
885       TS-430S             RECEIVER INTERNAL BEAT
886       TS-930S             INTERMITTENT TX POWER OUTPUT
887       TS-430S             NOISE BLANKER IMPROVEMENTS
888       TS-430S             INTERMITTENT PLL UNLOCK IN FM/AM
892       TM-411              LOW/NO RECEIVER SENSITIVITY
893       TS-930S             NOISY POWER SUPPLY FAN
895       TS-430S             PLL UNLOCK AT HIGH TEMPERATURE
896       TS-940S             LCD CLOCK DISPLAY ERRATIC OPERATION
897       TM-211/411          AF GAIN CONTROL PART CHANGE
900       TS-940S             PLL UNLOCK
901       TR-2600A            PLL UNLOCK (TROUBLESHOOTING)
902       TS-430S             LOW/INTERMITTENT RX
903       TR-2600A            PLL UNLOCK
904       TM-2550             DCL CALL SIGN DATA
905                           COAX CABLE WITH PLUG LIST
906       TM-2570             LOW TX POWER OUTPUT
907       TS-940S             ANTENNA TUNER RELAYS
908       TS-940S             PLL UNLOCK
909       TS-940S             AVR UNIT CAPACITOR CHANGE
910       TS-940S             AGC CIRCUIT IMPROVEMENTS
912       TS-940S             TRANSMITTER HUM IN SSB
913       TS-940S             SIGNAL TO NOISE RATIO IMPROVEMENT
914       HMC-1               NOT TO BE USED WITH TH-205ST/TH-215A
916       PS-50               IMPROVED VOLTAGE SURGE PROTECTION
917       TS-940S             VCO CARRIER TO NOISE RATIO IMPROVEMENTS
918       TS-940S             SQUELCH SWITCHING NOISE
919       R-5000              NO FREQUENCY CHANGE THROUGH COMPUTER         
                              INTERFACE
920       TH-205/215          PROTECTION FUSE REPLACEMENT WITH DIODE
921       TS-940S             SSB TALK POWER IMPROVEMENT
922       RC-10               HANG UP TIME/TIMEOUT TIMER SETTINGS
925       TM-3530A            NOISY TRANSMIT
926       TW-4100A            REPEATER STOP SCAN ON THE UHF BAND
927       RC-10               ALTERNATOR NOISE
928       TS-140S             INTERMITTENT LOSS OF TRANSMIT POWER
929       TS-140S             MOMENTARY TRANSMISSION WHEN VOX IS TURNED
                              ON
930       TM-721A             MICROCOMPUTER LOCK-UP
931       TM-721A             LOW/NO VHF TRANSMIT POWER
932       TH-25/45            W/TSU-6 TONE ALERT IMPROVEMENTS
933       TM-221A             NO TX IN HIGH POWER DUE TO VOLTAGE DROP
934       TM-221A             FINAL MODULE HINTS
935       TM-321A             LOSS OF TX AUDIO WITH MC-48B
936       TM-721A             S-METER DEFLECTION DUE TO PULSE NOISE
937       TM-721A             AF PA WHITE NOISE WITH MC-48B
938       PS-430              VOLTAGE INCREASE WITH TH-205/215
939       TH-25/45            AUTOMATIC POWER OFF FUNCTION
941                           SERVICE MANUAL RX SECTION LEVEL DIAGRAMS
942                           SERVICE MANUAL TX SECTION LEVEL DIAGRAMS
944       TH-205/215          VOLUME/SQUELCH CONTROL IMPROVEMENTS
945       TH-205              SIGNAL TO NOISE RATIO IMPROVEMENTS
946       TH-215/415          TX SIGNAL TO NOISE RATIO IMPROVEMENT
947       TS-440S             OPERATION WITH THE MC-85
948       TS-440S             NOTCH FILTER LOW FREQUENCY IMPROVEMENTS
949       TS-440S             PROTECTING Q33
950       TS-440S             CASE SCREWS BINDING IN THE HEAT SINK
951       TS-940S             ERRATIC DISPLAY (REMOVE THE SOCKET)
952       TS-440S             INTERMITTENT OPERATION (REMOVE THE           
                              SOCKET)
953       MC-55               CHANGE IN MIC ELEMENT (T91-0328-08)
954       TS-820S             TA7201P SUBSTITUTION PARTS KIT