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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Ampeg v4 tubes glowing red
  2. JCM900 4100 Problem
  3. Ampeg vl 502 got really quiet all of a sudden...
  4. Change speaker impedance??
  5. fender twin amp volume surge in effects loop
  6. Baldwin C1 amp Fuse size
  7. Johnson 40W tube amp combo
  8. Peavey kb/a 100
  9. Ampeg Reverbrocket R12R No Tremolo
  10. Ampeg B2 Combo Explodin'
  11. AC30 Top Boost Pulsating Tremolo??
  12. Peavey Bandit 112 powers up no sound
  13. Getting inside my Behringer acx1000 amp
  14. Could someone tell me what a cross for a "Reverb Pan type M" would be.
  15. Distortion channel trouble, B-52 AT-212
  16. discounted SED factory seconds
  17. Marshall TSL100 head model year 2001
  18. JCM 800 loud cracking sound
  19. Vox V1143 Super Beatle schemo
  20. Mesa Lone Star Screen Grid Resistor Values
  21. Quasi Complementary Output Stage Design Question
  22. 12ax7 - 334V schem says 185V ???
  23. Aluminium TO3 insulators??
  24. Deluxe Reverb Buzz
  25. Wanted to get some advice about starting reconing at my amp shop. Good idea?
  26. Crate v18 Catastrophe
  27. Fender Bassman 300 whats the b+ voltage?
  28. Lab Series enigma
  29. Fender Princeton 65 dsp Distortion channel cutting in and out.
  30. marshall jcm3210 mosfet - gain pot w/pull switch
  31. The Twin jack
  32. Embarassing question about tube retainers.
  33. Fender 75 wont go low?
  34. Roland cube 60 broken lead channel.
  35. JCM900 4500
  36. Replaced Power Caps but Now No Clean Channel
  37. Ampeg ba115 blows fuses
  38. Gallien Krueger 1000RB Oscillating
  39. Crate Stealth GT50 doesn't have any Vol on Dst channel
  40. f^*%ing Blues Jr
  41. Ripped Cone repair method
  42. Silverface Bassman 135 Ext Spkr jack...?
  43. Loud hum and blown fuse
  44. AVT150HXT Marshall head, wont play lows
  45. IIEEEE! Is this thing glued together??
  46. Behringer PMP5000
  47. Identify Parts Please...
  48. Is this a dead output transformer?!?
  49. mt54
  50. cathode resistor and cap, SFTR vs AB763
  51. F6.3l fuse
  52. Marshal 5213 Mosfet
  53. Super Reverb weak vibrato
  54. Loss of Gain in a Crate V1512
  55. Need help fixing simple SWR Triad speaker wiring
  56. How to bias an Ampeg Gemini VI gs15r
  57. VOX VT 50 crackling
  58. Ampeg B18-N Output Tubes Run Hot
  59. 65 Twin Reverb RI Reverb Noise
  60. 65 Twin Reverb RI Reverb Noise
  61. Blues Jr reverb problem?
  62. Blues Jr. Reverb Buzz
  63. Help needed with a TSL 100 head !!
  64. DeVille bias pot problem
  65. Tone Stack Calculator - Traynor
  66. AC15 has output but no sound...
  67. Mesa Lonestar special - whooshing sound
  68. Peavey Nashville 400
  69. Earth bassman 4x12 Low volume/dirty tone issue
  70. Kustom K150-5 PA no reverb
  71. Re-capping Gemini I question
  72. peavey PA 120
  73. Tube type question?? Vox
  74. Electrolytic cans voltage ratings...
  75. A Problem with the old model c?, Peavey cs800 power amp Loud Popping
  76. Source for A1M 12MM miniature pot
  77. Behringer GMX110 volume issue clean vs dirty
  78. Need Help Fender Acoustisonic
  79. red plating?
  80. "Non-serviceable" Fender amps
  81. Acoustic 150B in horrible condition
  82. Weather Strip?
  83. Marshall fuseholders
  84. moving to the USA
  85. Vox VT50 volume dependent hum?
  86. peavey tnt 130
  87. Marshall Mosfet Lead Output Stage Problem
  88. Mesa Boogie MKIII blowing fuses
  89. Looking for Fender Frontman 212R B 50K Pot
  90. Cold bias on Epiphone Triggerman
  91. Buzz
  92. Deoxit
  93. Twin Reverb - help with troubleshoot
  94. Fender Blues Deville 1994 - Cutting Out
  95. Hartke 3500 distortion in preamp
  96. heater wire for a Kalamazoo reverb 12 I just got
  97. marshall 6100 trouble
  98. Fender Super Sonic Effects Loop Issue
  99. Hello Classic 30 question.
  100. Setting bias on a Ampeg SVT 4 Pro
  101. Cap Replacement...Which caps to use
  102. Lonestar Special 5w & 15w fade out
  103. Marshall DSL 100, loudspeaker out, 16 ohms ok but parallel 4,8 ohm no sound
  104. Lab Series L4 Bass Head 200 watts, IC sub for CA3094ae Op Amp
  105. Popping/Crackling Blues Jr on Startup
  106. vibro champ
  107. Please help with my Peavey Classic 50!
  108. Peavey Renown Problem
  109. Fender Twin Reverb-less 65 RI
  110. Musicman 2100 RD line out?
  111. Thank you to the kind contributors here
  112. help me put humpty together again(Sound City Content)
  113. Fender Blue Deluxe Problem
  114. Distorted Reverb- SF Super Reverb
  115. Fading Marshall
  116. I don't think tube amps are supposed to emit smoke....
  117. Removeing the groundswitch in a Fender ab763
  118. B-52 AT100 head trouble
  119. Walter Woods parts
  120. Ampeg v4 bias supply issue
  121. Relays in Marshall TSL 100, channel switching issues
  122. Carvin BelAir troubles
  123. Roland JC-77 noisy Chrous OFF mode
  124. Roland Cube 60 Chorus CH60 - Help Chorus broken!
  125. Marshall valvestate vs65r loud pop
  126. Heater wiring for 6CG7 tube
  127. Mesa Boogie Rect-o-verb
  128. Anyone know the B+ Voltage of Marshall DSL401
  129. Randall pro-tube 2000 no sound. HELP!
  130. big trouble in home brew
  131. Problem with Laney TT100H
  132. randall rg50tc advertised as el34's sold with 5881's???
  133. Effects Loop Bleed Issue
  134. Marshall MG100 HDFX Burnt IC1
  135. GK 400RB blowing fuse on start-up
  136. Epiphone Galaxie 25
  137. Low volume issue
  138. Kustom 250 Fuzz issue
  139. Triaxis Troubleshooting
  140. Peavey kb 100 speaker replacement.
  141. Need a little help guys
  142. B-52 AT100
  143. Q: 1986 Marshall - troubleshooting
  144. stood on lead roland cube 20 dead. Help please
  145. Beginner advice
  146. Epiphone triggerman speaker?
  147. BF Showman Driver Stage Hum
  148. Trouble with Ampeg V-4
  149. BF Bandmaster rebuild troubleshooting
  150. Ruby Reverb spring repair
  151. OT Shunt biasing question...
  152. Fender FM212R Reverb Failure
  153. Yamaha T50C Soldano Overdrive Hum
  154. Need to install grounded power cable - advice
  155. 5E3 serious crackling
  156. Crate GX80 Channel switching
  157. Hum / Buzz only when cord attached...
  158. Dropping Voltage at PT
  159. Current surge in a heater circuit.
  160. Boogie - cuts out
  161. Bandmaster AB763, please help this newbie diagnose, i have all voltage measurments...
  162. Ampeg SVT-4 PRO Volume Drop at Gain Peak
  163. Plate voltage rising on PR
  164. Bassman 100 help: screen resistors fried
  165. Clean Amp distortion problem?
  166. Crate GTX120 residual hum issue
  167. Crate GX130C guitar amp cuts in and out
  168. How to discharge filter caps?
  169. AC15 screen resistors
  170. Hotrod Deville squealing?
  171. Marshall VS265 Speaker Issue
  172. Carrotron Noise Fader
  173. 5150 Channel switching
  174. Fender Stage Lead problem
  175. Bandmaster ab763. Thump or "waa" sound when standby is disengaged.
  176. Recap question
  177. Need Transistor Sub For Kustom K200
  178. Newbie looking for help on 5E3 hybrid
  179. HRDlx very very low output after mods
  180. AC15 RI red plating, no audio
  181. Bad Reverb Tank???
  182. Rats in the Peavey
  183. Alamo Amp-5 Help
  184. Princeton Reverb (Blackface) problem
  185. ampeg gemini 2 weak reverb
  186. Time for my first recap - Advice sought
  187. Marshall JMP Standby Problem
  188. marshall tsl bias and hum problem
  189. Marshall DSL 401 Bridge Rectifier
  190. no crunsh sound but lot of noise with Mesa Boogie Mark 3
  191. Cant seem to figure this one out......Soldano designed Yamaha T50C
  192. Super Reverb
  193. BNC or Banana Jacks to 1/4 jack
  194. Trouble shooting Silvertone twin twelve, squeal
  195. Hartke 3500 problem
  196. 50's Rickenbacker M8 amp died today. Help!
  197. Advice needed- best way to lower plate voltage
  198. Trouble with Fender frontman 15g
  199. Problem with a plexi
  200. loud hum w/ my Mesa
  201. Crate V18 does anyone have schematic for the smps pcb?
  202. Ampeg BA115 Trouble Shooting
  203. Fried my Ampeg AX-70!?
  204. Peavey Classic VT tube problem
  205. KT88 Champ
  206. Sunn Model T cap job
  207. el-84 red plating
  208. Help with Peavy Classic 50 4*10
  209. Peavey Chorus 400
  210. peavy bandit reverb out.
  211. Crate vintage club 30 volume spikes?
  212. Which Bias Probe to get? Compu-Bias or ??
  213. Crate G10-XL info
  214. Power Tube Rattle
  215. Not sending to reverb on Traynor YCV20
  216. Fender Super 210, no clean channel, stays loud
  217. SVT short, OPT suspected.
  218. Line 6 AX2 repair help
  219. Ampeg SVT-5 Pro Misc Questions
  220. Test point input signal
  221. Bugera V22
  222. Help fixing my Mesa Boogie Mark IV
  223. Need help with a 1988ish Polytone
  224. Fender Frontman 65R - hiss when cable plugged in
  225. Bad OT affect bias, cause redplating?
  226. new combo smell is it normal
  227. Orange Rocker 30 volume in&out
  228. Acoustic B200 short problem.
  229. Diagnosis assistant
  230. How to wire this Hiwatt Custom 20 fix?
  231. PT hum in Orange OR 80
  232. 60Hz Hum in Mesa Boogie Triaxis
  233. Epiphone Galaxie 10 Power Transformer
  234. Dummy Loads??!
  235. 1970's Fender Princeton: No Sound
  236. How to not destroy pots when removing knobs???
  237. Ampeg Gemini II can cap values
  238. Delta Blues reverb op amp
  239. Help with Biasing a Bassman 5F6A
  240. Roc Pro 1000 stuck on disortion?
  241. Peavey Dual amp
  242. HiWatt DR201 Bias Problem
  243. Capacitor Failure
  244. Help for a complete new guy
  245. B-52 matrix 200 with no output.
  246. Sound Cuts From Marshall vs65r
  247. A power or volume drop on a Fender Supersonic
  248. Bad pots, Come on?
  249. What did I do wrong?
  250. Cornford Carrera - Crackling/hissing