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File List  |  1990-05-31  |  13.6 KB  |  243 lines
  1. 5/31/90
  2.  
  3. Kenwood Service Bulletins - Part 1 of 3
  4.  
  5. The following is a list of Kenwood service bulletins which are
  6. available from the Kenwood phone BBS in California.
  7. This BBS can be reached by calling 213-761-8284  24 hours a day,
  8. 7 days a week.  The communication settings are 300-2400 Baud, 8N1.
  9.  
  10. 73 Don WB8HQS @ N9BAC.IN
  11.  
  12. ** Sorted by Model Number **
  13.  
  14. MODEL               SB #           TITLE
  15.  
  16. AT-930              877            SERVICE NOTES
  17. BS-8                41             ALIGNMENT WITH TS-180S
  18. DG-1                19             NEW DISPLAY TUBE
  19. DG-1                26             SERVICE NOTES
  20. DG-1                53             STANDARD SERVICE
  21. DG-5                25             REPAIR
  22. DG-5                28             REPAIR NOTES
  23. DG-5                29             THEORY OF OPERATION
  24. DG-5                54             STANDARD SERVICE
  25. DK-520              62             DG-5 USE WITH TS-511/TS-900/T/R-599
  26. DS-2                842            REPLACEMENT FOR DS-1A
  27. HMC-1               914            NOT TO BE USED WITH                  
  28.                                    TH-205AT/TH-215A
  29. MC-45               35             MODIFICATION FOR USE WITH TR-7400A
  30. MC-46               852            DTMF OPERATION WITH OLDER EQUIPMENT
  31. MC-55               953            CHANGE IN MIC ELEMENT (T91-0328-08)
  32. PS-430              938            VOLTAGE INCREASE WITH TH-205/215
  33. PS-50               916            IMPROVED VOLTAGE SURGE PROTECTION
  34. QR-666              3              VFO STABILITY
  35. R-1000              805            MUTING
  36. R-1000              813            AGC AM BANDWIDTH CHANGES
  37. R-1000              823            RF ATTENUATOR 10dB STEP OPTION
  38. R-5000              919            NO FREQ CHANGE BY COMPUTER           
  39.                                    INTERFACE
  40. R-599A/D            8              SERVICE NOTES
  41. R-599A/D            31             REMOVING CB BAND
  42. RC-10               922            HANG UP TIME/TIMEOUT TIMER SETTINGS
  43. RC-10               927            ALTERNATOR NOISE
  44. RM-76               33             FREQUENCY ERROR WITH TR-7600/7625
  45. RM-76               59             BATTERY BACK-UP POWER
  46. RM-76               802            MICROPROCESSOR FAILURE
  47. SM-220              57             SHIELD INSTALLATION
  48. SM-220              66             FEEDBACK FROM BS-8
  49. SMC-25              864            MODIFICATION FOR THE TR-2400
  50. T-599A/D            7              SERVICE NOTES
  51. T-599D              6              CHAIN DRIVE MODIFICATION
  52. T-599D              17             REDUCING 120Hz HUM
  53. TH-205              945            SIGNAL TO NOISE RATIO IMPROVEMENT
  54. TH-205/215          920            PROTECTION FUSE REPLACEMENT WITH
  55.                                    DIODE
  56. TH-205/215          944            VOLUME/SQUELCH CONTROL IMPROVEMENT
  57. TH-215/415          946            TX SIGNAL TO NOISE RATIO             
  58.                                    IMPROVEMENT
  59. TH-25/45            932            W/TSU-6 TONE ALERT IMPROVEMENTS
  60. TH-25/45            939            AUTOMATIC POWER OFF
  61. TM-201/401          880            INCREASED TX AUDIO
  62. TM-211/411          897            AF GAIN CONTROL PART CHANGE
  63. TM-221A             933            NO TX IN HIGH POWER DUE TO VOLTAGE
  64.                                    DROP
  65. TM-221A             934            FINAL MODULE HINTS
  66. TM-2550             904            DCL CALL SIGN DATA
  67. TM-2570             906            LOW TX POWER OUTPUT
  68. TM-321A             935            LOSS OF TX AUDIO WITH MC-48B
  69. TM-3530A            925            NOISY TRANSMIT
  70. TM-411              892            LOW/NO RECEIVER SENSITIVITY
  71. TM-721A             930            MICROCOMPUTER LOCK-UP
  72. TM-721A             931            LOW/NO VHF TRANSMIT POWER
  73. TM-721A             936            S-METER DEFLECTION DUE TO PULSE
  74.                                    NOISE
  75. TM-721A             937            AF PA WHITE NOISE WITH SQUELCH ON
  76. TR-2200A            11             ANTENNA ADAPTER
  77. TR-2200A            22             SERVICE NOTES
  78. TR-2400             58             TONE ENCODER RFI
  79. TR-2400             807            OPTIONAL CHARGE INPUT PROTECTION
  80. TR-2400             808            OFFSET FAILURE
  81. TR-2400             809            UNWANTED NOISE: TONE OR BURST AT TX
  82. TR-2400             810            DISPLAY OR KEYBOARD TROUBLE
  83. TR-2400             811            RX LOW INTERMITTENT OR DISTORTED
  84. TR-2400             814            UNLOCK
  85. TR-2400             815            PULSE NOISE
  86. TR-2400             818            SCRATCHY TX
  87. TR-2400             819            VOLUME CONTROL REPLACEMENT
  88. TR-2400             822            BATTERY CHARGER FAILURE
  89. TR-2400             830            TX NOISE
  90. TR-2500             858            RX IMD IMPROVEMENT
  91. TR-2600A            901            PLL UNLOCK (TROUBLESHOOTING)
  92. TR-2600A            903            PLL UNLOCK
  93. TR-7200A            23             SERVICE NOTES
  94. TR-7400A            10             FINAL UNIT ARCING
  95. TR-7400A            18             SERVICE NOTES
  96. TR-7400A            32             CHANGES IN PD UNIT
  97. TR-7400A            34             METER LAMP LONGER LIFE
  98. TR-7600/7625        39             ALTERNATOR WHINE
  99. TR-7600/7625        45             AUDIO TONE ON TX
  100. TR-7600/7625        50             OPTIONAL CERAMIC FILTER
  101. TR-7600/7625        65             RF POWER MODULE RETURNS (OBSOLETE)
  102. TR-7600/7625        806            MEMORY BATTERY BACK-UP
  103. TR-7625             804            INTERMITTENT TX
  104. TR-7625             820            FINAL MODULE REPLACEMENT
  105. TR-7625             826            HYBRID AMPLIFIER MODULE                                                 SUBSTITUTION
  106. TR-7730             854            TX FREQUENCY RESPONSE VOICE OR DTMF
  107. TR-7800             828            TONE PAD CONVERSION FOR 4th COLUMN  
  108.                                    FUNCTION
  109. TR-7800             829            MEMORY LOSS SUPERSEDED BY SB-861
  110. TR-7800             834            PULSE NOISE
  111. TR-7800/7850        860            MEMORY CH. 7 INDICATOR ERRATIC
  112. TR-7800/7850        861            MEMORY IMPROVEMENTS
  113. TR-7800/9000        833            OPTIONAL CERAMIC FILTERS
  114. TR-7850             846            RF LED METER (LOW READINGS)
  115. TR-7930/7950        870            RX INTERFERENCE
  116. TR-8300             16             ALIGNMENT
  117. TR-8400             843            SUB-AUDIBLE ENCODER INSTALLATION
  118. TR-8400             845            RX INTERNAL SPURIOUS SIGNALS
  119. TR-8400             853            TX FREQ RESPONSE VOICE OR DTMF
  120. TR-8400             855            TRANSMIT DELAY TIME
  121. TR-9000             824            CW/SSB TX INSTABILITY
  122. TR-9000             825            TX PULSE NOISE IN SSB
  123. TR-9000             849            TRANSMITTER SIDEBAND CARRIER                                            BALANCE
  124. TR-9000             859            TEMPERATURE STABILITY IMPROVEMENT
  125. TR-9130             871            LOW DRIVE LEVEL
  126. TS-120S             37             VOX OPERATION PICK-UP TIME
  127. TS-120S             38             FINAL TRANSISTOR REPLACEMENT
  128. TS-120S             40             ANTENNA INPUT TRANSFORMER           
  129.                                    REPLACEMENT
  130. TS-120S             48             HUM IN SSB TX
  131. TS-120S             51             FINAL PROTECTION
  132. TS-120S             60             REPAIR NOTES
  133. TS-120S             64             FULL CW OUTPUT IN SSB MODE (USE SB-                                     844)
  134. TS-120S             801            TX OSCILLATION (USE SB-844)
  135. TS-120S             816            BAND PASS FILTER CHANGE
  136. TS-120S             827            VFO STABILITY
  137. TS-120S             821            TX OSCILLATION (USE SB-844)
  138. TS-120S             831            ANTENNA INPUT TRANSFORMER
  139.                                    REPLACEMENT
  140. TS-120S             832            FULL CW OUTPUT IN SSB MODE (USE SB-
  141.                                    844)
  142. TS-120S             844            TX OSCILLATION
  143. TS-120S/180S        44             PHONE PATCH TERMINAL ADDITION
  144. TS-140S             928            INTERMITTENT LOSS OF TRANSMIT POWER
  145. TS-140S             929            MOMENTARY TX WHEN VOX IS TURNED ON
  146. TS-180S             36             DFC HUM WITH PS-30
  147. TS-180S             42             IF #2 OUTPUT LEVEL CHANGE
  148. TS-180S             47             INCREASE OF RX AUDIO OUTPUT
  149. TS-180S             55             LOW 40 MTR ALC
  150. TS-180S             56             DFC
  151. TS-180S             61             TROUBLE SHEET
  152. TS-180S             67             DFC INSTABILITY
  153. TS-180S             803            CW DELAY DURING VOX MEMORY
  154.                                    OPERATION
  155. TS-180S             817            USE WITH A LINEAR AMPLIFIER
  156. TS-180S             839            VFO STABILITY
  157. TS-180S             850            LOW PASS FILTER OPTIONAL CHANGES
  158. TS-430S             865            500KHz HETERODYNE
  159. TS-430S             882            NOTCH CONTROL
  160. TS-430S             883            AM WIDE/NARROW FILTER SELECTION
  161. TS-430S             885            RECEIVER INTERNAL BEAT
  162. TS-430S             887            NOISE BLANKER IMPROVEMENTS
  163. TS-430S             888            INTERMITTENT PLL UNLOCK IN FM/AM
  164. TS-430S             891            PLL UNLOCK AT HIGH TEMP. (USE SB-   
  165.                                    895)
  166. TS-430S             895            PLL UNLOCK AT HIGH TEMPERATURES
  167. TS-430S             902            LOW/INTERMITTENT RX
  168. TS-440S             947            OPERATION WITH THE MC-85
  169. TS-440S             948            NOTCH FILTER LOW FREQUENCY          
  170.                                    IMPROVEMENTS
  171. TS-440S             949            PROTECTING Q33
  172. TS-440S             950            CASE SCREWS BINDING IN THE HEAT      
  173.                                    SINK
  174. TS-440S             952            INTERMITTENT OPERATION (REMOVE
  175.                                    SOCKET)
  176. TS-520              2              NOVICE OPERATION (75 WATTS)
  177. TS-520              4              AM BROADCAST INTERFERENCE
  178. TS-520              21             SERVICE NOTES
  179. TS-520              63             IF OUTPUT FOR SM-220
  180. TS-520(S)           46             CW FREQUENCY SHIFT
  181. TS-520(S)           52             BS-5 SWEEP INTERFERENCE
  182. TS-520S             43             -6VDC SUPPLY FAILURE
  183. TS-520S/820S        812            CW FILTER SELECT CONTROL
  184. TS-530S             848            LOW VOLTAGE SUPPLY OPTIONAL
  185.                                    IMPROVEMENTS
  186. TS-530S             878            IF UNIT Q2-Q7 PROTECTION
  187. TS-660              856            MICROPROCESSOR LATCH-UP
  188. TS-700A             20             SERVICE NOTES
  189. TS-700A             5              REPEATER MODIFICATION (EUROPE)
  190. TS-700A             27             9 VOLT REGULATOR REPLACEMENT
  191. TS-820              12             AUX BAND INSTALLATION (RX ONLY)
  192. TS-820              13             RIT MODIFICATION
  193. TS-820              14             MICROPHONE INPUT ATTENUATOR
  194. TS-820S             9              SPEECH PROCESSOR ALIGNMENT
  195. TS-820S             24             SERVICE NOTES
  196. TS-820S             30             GENERAL ALIGNMENT PROCEDURES
  197. TS-820S             954            TA7201P SUBSTITUTION PARTS KIT
  198. TS-830S             837            OPERATION ON 240V AC
  199. TS-830S             840            FREQUENCY SHIFT
  200. TS-830S             847            LOW VOLTAGE SUPPLY OPTIONAL         
  201.                                    IMPROVEMENTS
  202. TS-830S             851            NOISE BLANKER OPTIONAL IMPROVEMENTS
  203. TS-830S             857            TRANSMITTER "TALKBACK"
  204. TS-930S             863            INCORRECT LINE VOLTAGE SETTING
  205.                                    (OBSOLETE)
  206. TS-930S             866            CW HETERODYNE TONE
  207. TS-930S             867            SSB TX TONE QUALITY
  208. TS-930S             868            LOW RX SENSITIVITY
  209. TS-930S             869            PLL UNLOCK
  210. TS-930S             872            CW PITCH TONE SHIFT
  211. TS-930S             873            CW VBT
  212. TS-930S             874            RF FEEDBACK
  213. TS-930S             875            RX AUDIO OSCILLATION
  214. TS-930S             876            RF FEEDBACK INTO MIC CIRCUIT
  215. TS-930S             879            ALC LEVEL DRIFT 28 MHz CW
  216. TS-930S             881            POWER SUPPLY SURGE PROTECTION
  217. TS-930S             884            15 MTR INTERNAL BEAT NOTE
  218. TS-930S             886            INTERMITTENT TX POWER OUTPUT
  219. TS-930S             893            NOISY POWER SUPPLY FAN
  220. TS-940S             896            LCD CLOCK DISPLAY ERRATIC OPERATION
  221. TS-940S             900            PLL UNLOCK
  222. TS-940S             907            ANTENNA TUNER RELAYS
  223. TS-940S             908            PLL UNLOCK
  224. TS-940S             909            AVR UNIT CAPACITOR CHANGE
  225. TS-940S             910            AGC CIRCUIT IMPROVEMENTS
  226. TS-940S             912            TRANSMITTER HUM IN SSB
  227. TS-940S             913            SIGNAL TO NOISE RATIO IMPROVEMENT
  228. TS-940S             917            VCO CARRIER TO NOISE RATIO          
  229.                                    IMPROVEMENT
  230. TS-940S             918            SQUELCH SWITCHING NOISE
  231. TS-940S             921            SSB TALK POWER IMPROVEMENT
  232. TS-940S             951            ERRATIC DISPLAY (REMOVE SOCKET)
  233. TW-4100A            926            REPEATER STOP SCAN ON THE UHF BAND
  234. VFO-120             862            DIAL LAMP SWITCHING CIRCUIT
  235. VFO-230             838            OPERATION ON 240V AC
  236. VOX-3               15             SENSITIVITY AND DELAY
  237.                     49             UHF/VHF OPTIONAL FILTER LIST
  238.                     905            COAX CABLE W/PLUG LIST
  239.                     941            SERVICE MANUAL RX SECTION LEVEL     
  240.                                    DIAGRAMS
  241.                     942            SERVICE MANUAL TX SECTION LEVEL
  242.                                    DIAGRAMS
  243.