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View Full Version : Maintenance, Troubleshooting & Repair



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  1. EC Tremolux Service Manual
  2. Ampeg BA115HP speaker popping
  3. Fender deluxe 112 Plus. Really hot but sounding fine?
  4. Randall part #
  5. Peavey VTM 60 Clean Channel?
  6. Peavey Classic VTX
  7. line 6 spider iii 15 no Power
  8. Acoustic Model 115 - Reverb Not Working
  9. Spider Valve HD100 input/codec board burnt
  10. Peavey Heritage VTX, no sound output
  11. DV Mark DV40 112 40W Combo Reverb Volume Issue
  12. Sound City 30C Mark 6 - occasional soft motor boating
  13. Hartke HS 1200 bass amp transformer needed
  14. New 2203 pops
  15. Think I just blew my power transformer
  16. Marshall SL5
  17. Behringer LPA1180 Power supply in short
  18. KMD XV100SD Tube Amp has FX Loop problem - please help
  19. Reverb isolator replacement for Gibson Saturn amp
  20. Lost inside Acoustic G120 2x12 (Model 127)
  21. Vox channel switch pop
  22. stabilizing an amp
  23. 73 Vibro Champ : No Sound
  24. Fender Deluxe 112 plus bad buzz
  25. How do I tell the different primary wires in a power tranny?
  26. Peavey Heritage VTX driver checking?
  27. Sunn Sentura II - Cap PolarityQuestion
  28. Thermal Switch Kicking On/Off (Peavey XR-600B series 400HB)
  29. New KT66 opinions
  30. Crate GT1200H Effects Insert
  31. Weak/Distorted Sound from old Roland Cube 40 (Orange)
  32. .How much tolex will you need to covered cabinet
  33. 65 Fender Twin Reissue crackles at high volume
  34. Early 70's Fender Princeton
  35. Crate GT1200H Volume Loss after 20-30 min's
  36. Ampeg SVT-3 Pro - starts up - then fan cuts out before relay switches - no output.
  37. Crate V50
  38. Effiective ways to test multi section cap can?
  39. Laney GH50L hum
  40. Ceriatone JTM45 blowing mains fuse
  41. Behringer k3000fx blowing fuses
  42. AIDEAN MESIA 100 troubles with hum and reverb
  43. Anyone need a tre' bitchin' dummy load?
  44. Carvin Sx-200 blown switching power supply
  45. '62 JMI era Vox AC30 rebuild help!
  46. Peavey original Backstage schematics
  47. Conductive Fibre Eyelet Board? Vintage Fender
  48. Marshall 40th Anniversary Super 100 JTM 45/100 hums.
  49. Troubles Finding This Part
  50. QSC PWM IC
  51. parallel caps in Marshall curcuit
  52. Ampeg SVT-II (non-pro) craps out after a few minutes
  53. 1965 Supro Amp
  54. Princeton crackles when I play chords
  55. fender pro junior mod failure
  56. Bias mod Peavey VTM 60
  57. newer fender octave BS
  58. Drip Edge '69 Deluxe Reverb Chassis pic for your consideration
  59. Low gain vs. high gain tubes
  60. bassman burnout
  61. Redmere Soloist in a bushel basket
  62. Assistance replacing an impedance selector on Vintage Marshall JCM 800
  63. Mesa Studio 22 Caliber Plus issues
  64. rex branded Valco 6143 amp w/no power transformer
  65. Fender Blackface Tremolux RED HOT
  66. OH no this amp is so clean!!
  67. Mojo 5E3 bias (heat?) issues...
  68. Vox AC30-6/TB with Loud Xfmr Mechanical Hum
  69. Bose Acoustic Wave Radio AWRCC2 Noise
  70. Chicago Blues Box - blowing tubes
  71. RC4739DB substitution
  72. Laney VC30 Porblems
  73. measuring output power
  74. Super Champ XD Red light on. Channel select light off. No Sound.
  75. Laney AOR series 2 100 watt/Laney pro-tube 50 watt
  76. JMI VOX AC30 Motor Boating on Normal Channel - Help
  77. Crackling/buzzing with higher volumes in a Carvin X100B combo.
  78. Top Boost preamp anomaly Q
  79. Pwavey CS800X
  80. Ampeg PF500
  81. Roland JC 77 reverb issue
  82. Orion Lasers
  83. HI new to the group.
  84. SF Vibro Champ, no vibrato
  85. 6L6 tubes for Peavey Deuce?
  86. Crate VC3112 clean channel noise
  87. Ampeg B15 with dreadful hum Help
  88. Mircophonic SS amp?
  89. 6L6 tubes
  90. 59 Fender Super amp, replaced PT heater question
  91. Hartke 10" replacement suggestions?
  92. 100w valve head cutting out
  93. Princeton Reverb clone tremolo intensity help
  94. Tips to remove stuck chassis from cabinet?
  95. Noisy pots
  96. B-52 AT-100, won't power on... please help!
  97. Dean Markley CD120
  98. Hartke A100
  99. Loud Hum in 1974 Twin Reverb
  100. Laney dp100 bass amp disaster
  101. Old Gretsch Amp - need schematic and advise
  102. fender Prosonic 22 hum problem
  103. Need some hel retrofitting new PT into 70's Dual Showman Rvb
  104. Deluxe Reverb RI - Buzzin'!
  105. Marshall MG50DFX no sound on CD, main input, or FX return.
  106. Soundcraft EFX8 vs heavy falling object
  107. OR120 Pix Only Help!
  108. Servicing noisy pots on late Fender Pro Reverb Amps---PCB removal insanely difficult
  109. Need advice replacing some caps in old tube amp
  110. VOX AC15 virtually no output (volume) even with volume all the way up
  111. Crate BX-25 Intermitent Volume levels
  112. Harmony H406 distorted Really low output
  113. GK800RB Pwr Transformer question
  114. GK 250ML speakers
  115. Crate Taxi TX15 battery full but dosent work
  116. Frontman 212R Power Amp Problem
  117. Bassman 50 volume issue
  118. Marshall valvestate 8080 repaired?
  119. Peavey Vypyr 75 blown fuse
  120. Marshall JCM 2000 DSL 100 - tubes red-plating
  121. Have the problem with Fender Passport 500pro
  122. JCM2000 DSL 100W Head issue resolved!
  123. Carvin vt112 low output
  124. Fender The Twin Resistors?
  125. Engl Fireball 60 crackling on warm up
  126. I don't know how you guys do it!
  127. Kustom K100-2 reverb problem
  128. Gallien Krueger 200MB - Low voltage at rectifier
  129. Fender Super Reverb silverface Hum
  130. Power Problem Maine Amp
  131. 1948 Fender Champion 800 no output
  132. Bugera 333 Hum and radio station
  133. Which model Boogie is this?
  134. Fender Hot Rod Deluxe snap , crackle , pop ...
  135. fender hrd speaker blown
  136. Harmony H500 AC cord mod
  137. Marshall mg50dfx
  138. NPN Transistor question
  139. Peavey Classic 400 Tube Bass Amp - Preamp issue
  140. Gibson Vanguard GA77RVT Troubles - Reverb on Normal Channel
  141. Peavey XR600E (Dead)
  142. Power Transformer - Rivera-era Fender Concert
  143. Peavey Folded Line Reverb Tank
  144. Silvertone 1431 6AU6 Screen Grid Trimmer
  145. XLR/1/4" combo jacks for QSC
  146. Help a novice finish a vox 15r pot repair
  147. Interference from EOP devices
  148. Twin Reverb Issue
  149. Proper way to test a Power Transformer after an amp meltdown?
  150. Peavey CS-800x power board circuit short
  151. DOD 831 II Graphic Eq. Will someone help to troubleshoot this dead unit ?
  152. AC power test setups and tools; GFI as a tester
  153. SVT CL brief buzz coming out of standby
  154. hot rod deluxe PT voltage?
  155. Hartke LH500 Protection Circuit
  156. Pickup issue
  157. SVT 3 PRO - hum
  158. Peavey Valveking VK212 100W Combo: No Tube Power
  159. Fender DRRI reverb problem suspect footswitch please help going crazy!
  160. Sope question
  161. Ensoniq SQ-80 losing polyphony voices
  162. loud intermittent humming problem
  163. Carvin X100 speaker fuse
  164. Traynor YGM-3 Reverb Fail
  165. Fender Super 60
  166. DFX Professional 215X
  167. Cooling fan re-connection
  168. Amcrom Power Stage 2 O/P problem
  169. HELP!...peavey bass head mark III series buzz problem...HELP!
  170. Popping tremolo - dead amp
  171. Laney hair puller
  172. Reverb oscillation fixed
  173. Fender Super Bassman Automatic Bias issues
  174. Varisistor ratings in a Fluke 8010A bench meter
  175. ampeg sb12 very high voltages
  176. Ampeg B200r trouble
  177. Marshall AS50R with a loud popping sound on switch on
  178. Is this one possible failure mode for filter caps?
  179. Bad red plating problem!
  180. Tracking a Princeton Reverb build hum!!!
  181. Anoten twin reverb 65 ri with reverb hum
  182. Crate GLX212 preamp screeching sound
  183. Power Amp module for Marshall MG100hdfx wired wrong
  184. Pot cleaning
  185. Mosfet Question (Trace Elliot)
  186. Yamaha P7000 Service Manual in English?
  187. Blues Deluxe Low B+ voltage crackling distorting
  188. Fuse Blowing Issues
  189. Tube Sockets
  190. 1984 Legend A30 Series II Power Transformer Question...
  191. Gibson GA77 RET-L Lancer, help with zenor diode replacement
  192. Burns Orbit Three - Ticking
  193. Source for Reverb Tank Transducers?
  194. Trace Elliot Velocette questions
  195. SVT-CL: Another one for the guru :-)
  196. High B+ voltage in '60s Ampeg Gemini
  197. Fender '68 Custom Twin Reverb Hum
  198. Solid State Acoustic Guitar Amp - Hum Problem
  199. TSL100 noisy when VPR switch pushed in
  200. Bogner Shiva Power Tube Pins 1&8 Not grounded?
  201. Soldano Lucky 13 (Leaking o/p board?)
  202. Help Fixing my Sessionette 75 AMP Power Module
  203. Peavey VTX Heritage phaser
  204. Any tips on reflowing solder on PCB?
  205. Peavey Envoy 110 Transtube (red stripe) question - crackling on sustained notes
  206. audio testing of amplifiers...espically home audio and PA...
  207. High voltage replacement caps
  208. Behringer PMP1000
  209. Ampeg V9 SVT filament transformer hum and vibration
  210. Yorkville NX750P
  211. Fender Twin Reverb 65 RI keeps blowing 8 amp filament fuse
  212. Marshall JCM2000 TSL100 Footswitch problems
  213. My fender stage 185 amp won't power up
  214. Ampeg SVT-3 Pro Repair help, R27 catches fire on power up
  215. Marshall JCM 800 (2203) Microphonic O/P Valve problem.
  216. Hot Rod Deluxe, 1996, at my wits end - hum problem won't go away!
  217. Kustom Challenger
  218. Finding Plate Voltage
  219. Reverb Tanks: An Orientation Experiment
  220. Ugly distortion with tube amp when you play
  221. Sound City 120R: need some advice
  222. Another Antique Peavey
  223. Ampeg SVT-CL/AV Tech Flex replacing Clear Vinyl 'garden hose' harness sleeving
  224. Preamp DC Heater Help
  225. Peavey Bravo Plate voltage
  226. Carlsbro TC200 recap
  227. Ashdown MAG 600 Blows Fuses
  228. Otange AD140 real output power?
  229. Gibson G50 hums...
  230. V4 ONLY works on my bench
  231. Hammond output transformer help
  232. Mesa Mark V sneaky or annoying?
  233. Ampeg STV 4 Pro MOSFET replacement and other Qs
  234. New amp with high voltage on the transformer
  235. SVT-CL: Protection at Turn-On
  236. Carvin Pro Bass II
  237. Power transformer secondary
  238. jcm 900 mkIII combo safer connection with mesa boogie 4x12 cabs
  239. Fender Ultimate Chorus issues
  240. 5mm SQ Red/Yel LED's for Fender HR DieVille Amps, Pedals
  241. Crackling, splattering in amp...
  242. MusicMan 1650RD troubles
  243. Marshall JCM900 SL-X 50Watt high gain master volume 2500 Muffled sound
  244. Hot Power Transformer, Budda SD30-II
  245. Fender Twin Reverb....silver face
  246. Parts for a Peavey 212 SF?
  247. Fender Super Sonic 22 Vol and Bass drop on Burn ch.
  248. Deluxe Reverb - weird vibrato oscillator voltages + choppy trem
  249. Problem with Univox U130L
  250. OK comrades...MIG 100B and MIG 100H Differences?