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View Full Version : Maintenance, Troubleshooting & Repair


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  1. Distorted Reverb- SF Super Reverb
  2. Fading Marshall
  3. I don't think tube amps are supposed to emit smoke....
  4. Removeing the groundswitch in a Fender ab763
  5. B-52 AT100 head trouble
  6. Walter Woods parts
  7. Ampeg v4 bias supply issue
  8. Relays in Marshall TSL 100, channel switching issues
  9. Carvin BelAir troubles
  10. Roland JC-77 noisy Chrous OFF mode
  11. Roland Cube 60 Chorus CH60 - Help Chorus broken!
  12. Marshall valvestate vs65r loud pop
  13. Heater wiring for 6CG7 tube
  14. Mesa Boogie Rect-o-verb
  15. Anyone know the B+ Voltage of Marshall DSL401
  16. Randall pro-tube 2000 no sound. HELP!
  17. big trouble in home brew
  18. Problem with Laney TT100H
  19. randall rg50tc advertised as el34's sold with 5881's???
  20. Effects Loop Bleed Issue
  21. Marshall MG100 HDFX Burnt IC1
  22. GK 400RB blowing fuse on start-up
  23. Epiphone Galaxie 25
  24. Low volume issue
  25. Kustom 250 Fuzz issue
  26. Triaxis Troubleshooting
  27. Peavey kb 100 speaker replacement.
  28. Need a little help guys
  29. B-52 AT100
  30. Q: 1986 Marshall - troubleshooting
  31. stood on lead roland cube 20 dead. Help please
  32. Beginner advice
  33. Epiphone triggerman speaker?
  34. BF Showman Driver Stage Hum
  35. Trouble with Ampeg V-4
  36. BF Bandmaster rebuild troubleshooting
  37. Ruby Reverb spring repair
  38. OT Shunt biasing question...
  39. Fender FM212R Reverb Failure
  40. Yamaha T50C Soldano Overdrive Hum
  41. Need to install grounded power cable - advice
  42. 5E3 serious crackling
  43. Crate GX80 Channel switching
  44. Hum / Buzz only when cord attached...
  45. Dropping Voltage at PT
  46. Current surge in a heater circuit.
  47. Boogie - cuts out
  48. Bandmaster AB763, please help this newbie diagnose, i have all voltage measurments...
  49. Ampeg SVT-4 PRO Volume Drop at Gain Peak
  50. Plate voltage rising on PR
  51. Bassman 100 help: screen resistors fried
  52. Clean Amp distortion problem?
  53. Crate GTX120 residual hum issue
  54. Crate GX130C guitar amp cuts in and out
  55. How to discharge filter caps?
  56. AC15 screen resistors
  57. Hotrod Deville squealing?
  58. Marshall VS265 Speaker Issue
  59. Carrotron Noise Fader
  60. 5150 Channel switching
  61. Fender Stage Lead problem
  62. Bandmaster ab763. Thump or "waa" sound when standby is disengaged.
  63. Recap question
  64. Need Transistor Sub For Kustom K200
  65. Newbie looking for help on 5E3 hybrid
  66. HRDlx very very low output after mods
  67. AC15 RI red plating, no audio
  68. Bad Reverb Tank???
  69. Rats in the Peavey
  70. Alamo Amp-5 Help
  71. Princeton Reverb (Blackface) problem
  72. ampeg gemini 2 weak reverb
  73. Time for my first recap - Advice sought
  74. Marshall JMP Standby Problem
  75. marshall tsl bias and hum problem
  76. Marshall DSL 401 Bridge Rectifier
  77. no crunsh sound but lot of noise with Mesa Boogie Mark 3
  78. Cant seem to figure this one out......Soldano designed Yamaha T50C
  79. Super Reverb
  80. BNC or Banana Jacks to 1/4 jack
  81. Trouble shooting Silvertone twin twelve, squeal
  82. Hartke 3500 problem
  83. 50's Rickenbacker M8 amp died today. Help!
  84. Advice needed- best way to lower plate voltage
  85. Trouble with Fender frontman 15g
  86. Problem with a plexi
  87. loud hum w/ my Mesa
  88. Crate V18 does anyone have schematic for the smps pcb?
  89. Ampeg BA115 Trouble Shooting
  90. Fried my Ampeg AX-70!?
  91. Peavey Classic VT tube problem
  92. KT88 Champ
  93. Sunn Model T cap job
  94. el-84 red plating
  95. Help with Peavy Classic 50 4*10
  96. Peavey Chorus 400
  97. peavy bandit reverb out.
  98. Crate vintage club 30 volume spikes?
  99. Which Bias Probe to get? Compu-Bias or ??
  100. Crate G10-XL info
  101. Power Tube Rattle
  102. Not sending to reverb on Traynor YCV20
  103. Fender Super 210, no clean channel, stays loud
  104. SVT short, OPT suspected.
  105. Line 6 AX2 repair help
  106. Ampeg SVT-5 Pro Misc Questions
  107. Test point input signal
  108. Bugera V22
  109. Help fixing my Mesa Boogie Mark IV
  110. Need help with a 1988ish Polytone
  111. Fender Frontman 65R - hiss when cable plugged in
  112. Bad OT affect bias, cause redplating?
  113. new combo smell is it normal
  114. Orange Rocker 30 volume in&out
  115. Acoustic B200 short problem.
  116. Diagnosis assistant
  117. How to wire this Hiwatt Custom 20 fix?
  118. PT hum in Orange OR 80
  119. 60Hz Hum in Mesa Boogie Triaxis
  120. Epiphone Galaxie 10 Power Transformer
  121. Dummy Loads??!
  122. 1970's Fender Princeton: No Sound
  123. How to not destroy pots when removing knobs???
  124. Ampeg Gemini II can cap values
  125. Delta Blues reverb op amp
  126. Help with Biasing a Bassman 5F6A
  127. Roc Pro 1000 stuck on disortion?
  128. Peavey Dual amp
  129. HiWatt DR201 Bias Problem
  130. Capacitor Failure
  131. Help for a complete new guy
  132. B-52 matrix 200 with no output.
  133. Sound Cuts From Marshall vs65r
  134. A power or volume drop on a Fender Supersonic
  135. Bad pots, Come on?
  136. What did I do wrong?
  137. Cornford Carrera - Crackling/hissing
  138. Mesa Boogie Duel rec. 3 ch. solo head with no power amp output
  139. Getting bias vltage from a non-centertapped secondary
  140. hartke 3500 power-on problem
  141. '84 Marshall 5005 Lead 12 power switch
  142. Tremolo Not Working-1972 Super Reverb
  143. fender stage 100 amp buzzing
  144. Laney becomes intermittent after two hours...
  145. Help with Carvin Legacy please - newbie
  146. Bassman 100 grid leak and bias Q's
  147. Hookup wire
  148. Noisy Princeton Reverb Clone
  149. Hot Rod Deluxe Master Pot
  150. Output wattage opinions?
  151. newbie help with marshall amp please
  152. '74 Pro Reverb with hum and reverb noise
  153. Removing powertubes and running
  154. Need Help with Fender Twin Reverb
  155. Power supply for a preamp
  156. need help with a resistor value
  157. Help with Marshall Please
  158. noise peavey classic 50
  159. Peavey XR 600E repairs
  160. nmv twin reverb vibrato
  161. Fender Twin-Amp Feedback
  162. Laney LC15 problem
  163. level dependant buzz/static
  164. 1964 Gibson GA17RVT "Scout" volume......
  165. Marshall 8004 Woes
  166. Trace Acoustic TA100R Schem.
  167. 1973 Princeton. Low volume.
  168. why is SFDR picking up more buzz than BF Bassman?
  169. Deluxe Reverb Stock Speaker Trouble
  170. Peavey Classic VTX
  171. Carvin BelAir - Low Voltage, Output, lot's of problems
  172. PREMIER AMPS B-160 and B-220
  173. My new Mesa Boogie Mark III Red Stripe
  174. Belgiums bitch
  175. Got a fender blues deville mexican, fixed a few problems but reverb feedsback bad.
  176. Marshall Haze 40C Tube 4 turns sign wave into hard very loud sq. wave to early,ideas?
  177. piezo preamp
  178. Vibro Champ not Vib-ing
  179. Deluxe Reverb Reissue Hum Issue
  180. Kustom 150 power supply 50% high
  181. Vibro Champ from parts... B+ voltage low, 155v
  182. Fender Footswitch trouble
  183. Amp Hiss
  184. AC30 TB/6 Vib/Trem Controls
  185. VOX AD100VT Troubleshoot
  186. plugging 8 ohm speaker into super reverb
  187. PV XXX channel sw problem
  188. Deluxe Reverb Power transformer - 0990761
  189. buzzing amp
  190. Mode Four smokin' but with real smoke!
  191. Ampeg SVT4-Pro Problems
  192. Peavey 130 Hum
  193. Crate Vintage Club 50 Head Is Hissing and Crackling
  194. trouble with ashdown evo2 300 and trace elliott gp7 amp heads
  195. Fender Squier 15 input jack
  196. Peavey Vypyr 15
  197. mesa problems
  198. Behringer ULM2000 microphone
  199. switch for an Ibanez TS9
  200. 5V4 in Champ
  201. Testing an output transformer
  202. CS800 Proper Schematic
  203. Hiwatt 200 problems
  204. Old Pro Reverb
  205. Help with output transformer
  206. Roland cube 100 guitar amp- loss of power
  207. Marshall g100rcd smoke checked?
  208. Is this "Crossover Distortion"?
  209. rattle in GT EL84s, again!
  210. Fender Showman output?
  211. Yamaha T100C
  212. Peavey Stereo Chorus 400 footswitch circuit needed.
  213. Marshall MHZ40C - Buzzing
  214. My Classic 30 DIED!!!
  215. Behringer GMX110 fried power amplifier
  216. Echoplex EP2 Hum
  217. How I "safely" use 2-prong amps until I change to 3-prong!
  218. Low voltages in 1972 Orange Graphic 80
  219. Need help! channel and crunch switch not working!!!
  220. need diagnosis help for dead amp
  221. Bridge rectifier issue...
  222. Mig-50 PI type parasitics after a few hours
  223. Fender Princeton Chorus
  224. Peavey Bass 400 m3 DC on Output
  225. Ampeg B-15T distortion
  226. Unidentified Model
  227. peavey 5150 sounds bad
  228. Vibro Champ Rebuild - Plate voltage high
  229. Bugera 333xl sounds bad suddenly
  230. Crate GTX212 Squeals on power up
  231. Crate PX-600 Whistles when turned off
  232. G1 amp in a Case
  233. Fender Frontman 15G 60hz Hum
  234. Peavey Vypyr 15 problems
  235. Carlsbro top 50 OT installation
  236. Help with Peavey Bravo
  237. Traynor Bassmaster Tubes
  238. Hum in DIY preamp
  239. Yamaha G50 112
  240. Sunn concert bass repaires
  241. NO sound out of 30 watt Peavey Delta Blues!
  242. Ruby EL84
  243. Quiet champ, blown OT?
  244. Need help yesterday
  245. Yamaha fifty 210, G50-210
  246. Diagnose a cheapo amp?
  247. Old Amp Hum
  248. Noisy presence pot
  249. Vintage Ampeg SVT troubles
  250. Trace Elliot SuperTramp Twin losing power