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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Help with a Tweed Champ first build?
  2. Problem With Mesa Studio Preamp
  3. Marshall 4140 Faceplate
  4. swr 550x input jacks
  5. Enzo, I fixed the Acoustic 270, but why?
  6. Yamaha EMX660
  7. problems with 5150 combo
  8. Marshall DSL 100 No Reverb
  9. Blues Deluxe strange hum problem
  10. Noisy Peavey EVH 150
  11. Hiwatt DR-103 Clone PI Issues
  12. Stone SGT60 drawing way too much current(blowing fuses)
  13. Acoustic Model 109 (G60-112) help
  14. Fender 30 ticking
  15. Fender Twin Amp Jumping Channels
  16. Mesa DC-5
  17. Verb tanks
  18. Marshall TSL122 Re-Cap
  19. Fender Showman Help- LOUD Hum
  20. Gibson GA 30 RV Loudness issue...
  21. Carvin XV-212C help
  22. Concert Bias
  23. AVT 150H Replacement Parts
  24. H&K Switchblade schematics?
  25. Fender Deluxe 85 Volume Issue?
  26. Transformer testing
  27. el84 Bias 9V at grid enough?
  28. SWR 350 hum problem
  29. B2Re Ampeg don't let me play
  30. DRRI 6V6s red plating
  31. Blues Junior Power Up Crackle
  32. Bugera 333XL popping noise
  33. Hot Rod deluxe motorboating in drive channel
  34. Peavey 6505 bias and grounding issue
  35. OT? vibrochamp..newb help please?
  36. Fender Twin Amp - Gain channel sucks, clean channel has limited Bass
  37. Sunn Model T rectifier diodes
  38. Ashdown 500 EVO blowing fs3 fuse
  39. gallien krueger MB150S
  40. Behringer BXL 1800A finally working
  41. Speaker coil for dummy load?
  42. Odd microphonic problem
  43. Marshall TSL100
  44. Dumble clone transformers
  45. 5Y3 Red Plate Special
  46. New Fluke Multimeter recommendation?
  47. Capacitor codes?
  48. torque t100 ga
  49. VHT amp problem
  50. Ampeg VT-40, has no sound...
  51. power/standby in one switch?
  52. Bogner XTC FX loop volume and tone drop
  53. Hartke HA3500/VX3500 combo troubleshoot.
  54. Fender 65 DRRI "squelching" noises . .
  55. 67 Vibrolux Reverb - Distortion/no signal???
  56. delete
  57. Line 6 Flextone help
  58. trace elliot 715x dead
  59. Marshall Valvestate 8280 Problems
  60. # 0990775 fender output transformer ??
  61. Vibrolux Reverb volume at zero
  62. Fender Bandmaster/Showman mod reversal
  63. Acoustic 470 PA
  64. Fender Stage 160 Instantly Blowing Fuses
  65. Help need jtm60 amp guru>>>>>>>>>>>>>
  66. Fender Princeton Reverb II troubleshoot
  67. Marshall MG50DFX
  68. HIWATT Amp Problem
  69. Blues Deville 4x10, flooded, no reverb
  70. SWR Workingmans 15" humming
  71. ampeg VL 1002
  72. Peavey GPS 900 pwr amp
  73. epiphone special
  74. Need help finding output transformer for Gibson BR-1 amp.
  75. Problem with +/- 15 supply to op amps
  76. SOVTEK Midget 50 Head blowing main fuse
  77. Princeton Reverb problems
  78. Allen Accomplice actin' funny
  79. Orange Rockerverb - Reverb -real 'bong-ie' sounding
  80. Crown K1 Volume Pots
  81. Flash Upon Power Up
  82. Behringer PMP3000
  83. Blues Jr. reverb problem
  84. Peavey 400BH blows fuse
  85. Fender Bassman Blackface '64 restore
  86. How to determine faults
  87. Problems w/ Hiwatt lead 50 head
  88. Ampeg v4-b problems
  89. PEAVEY - Rage 12 Watt - Problem
  90. Peavey Combo 300 problems
  91. What parts to save?
  92. Celestion G12T-75 Speaker Rattle problem
  93. Traynor YBA-1A...low distorted output.
  94. Strange preamp voltages in a Gibson GA-5 (like 5F1 tweed Champ)
  95. Fender Sidekick 35-Reverb Troubles
  96. Classic 50/212 Mod Trouble
  97. Fender Twin Reverb Silverface Repair Issue
  98. Fender Blues DeVille Hiss Problem
  99. boogie studio 22+ power transf substitute.
  100. Marshall Super bass red plating
  101. JCM800 6550 tube substitution and fuses
  102. Crate CPB150
  103. Fender Super-Sonic Driving Ground
  104. LR Baggs Acoustic Reference
  105. Crate G130cxl chorus "rate" pot value
  106. JCM 600 troubles
  107. How does a Tube Rectifier fail?
  108. Peavey Basic 60 Static
  109. Ampeg BA-115 Style Switch Cuts Out
  110. Noisy Silvertone 1484
  111. what's my next step up in solder irons?
  112. Peavey Artist VT,,need some help!
  113. I accidently installed a helicopter in my dumbleator!
  114. Marshall AVT150H losing power in OD2 channel
  115. Fender Blues Deluxe Components Source
  116. Buzz when touching polepieces
  117. bugera 333xl back with new info
  118. Amp Problem
  119. Peavey Classic 50/50 issues
  120. Fender Champ problems
  121. Fender Blues Deluxe Help
  122. Peavey Deuce SS preamp section
  123. Can I slow down this trermolo? - GA-5T
  124. Heath ta-16
  125. stuck rail
  126. Please tell me why I got a horrible shock
  127. Ampeg VT120 Acting Funny
  128. mesa boogie become monophonic
  129. Kustom 200 question
  130. New Peavey Vypyr 15 (problem?)
  131. Music Man 210 (chasis 2275-65)
  132. Peavey Minx 110 cutting in and out
  133. Roland JC120 issues
  134. Boogie - odd voltages
  135. fx loop sucking tone
  136. Marshall wires dsl 100
  137. volume drops, then goes. help?
  138. Peavey Express 112 Sheffield
  139. Best 30-40W tube design?
  140. Marshall MG 15 DFX and Valvestate VS schematics
  141. Madison Divinity II Head volume problems
  142. Gallien Krueger 700RB II - Bad Ground
  143. JCM 900-4100 preamp question
  144. Test equipment......
  145. Peavey Mace doesn't power up anymore
  146. Marshall AVT275 - No Sound From Main Speakers
  147. marshall vs 100 need help
  148. PIN Chart/Diagram
  149. 12dw7/ecc832
  150. Peavey TNT 100 Problem/ Questions
  151. Hot Rod Deville 212
  152. Fender Sidekick 35- transformer substitution
  153. Keyboard - Internal Zip drive
  154. 1966 Bandmaster and 60Hz hum....?
  155. Fender performer 1000 ( PR 209)
  156. Peavey XR 680c Volume cuts&Jumps
  157. HR Deville problem....?
  158. Late 90's Peavey Transtube Supreme repair (power transistor questions)...
  159. Stage 160 pre amp into FM 212 power amp question
  160. Fender Blues DeVille Faceplate?
  161. Thanks For The Help!
  162. MPSU95 sub?
  163. Transformer testing?
  164. New 5150 owner, need some help
  165. Peavey Duel 212 problem
  166. AC30SS hi-res schematics
  167. Crate RFX 65 RetroFex Hum
  168. Peavey 400 B/G Mark III Bass Amp Problem
  169. Acoustic 270 repair
  170. 7189 questions
  171. Peavey encore 65
  172. Need ampage v-4 filter caps
  173. Bassman 100 tubes drawing low current
  174. Silvertone 1484 Twin Twelve Tremolo Not Working
  175. Wire colors JMP 50 OT?
  176. 12v transformer for relays
  177. silvertone 1484 reverb(?)
  178. peavey PV-4C trips reset Switch
  179. Motorboating and NFB
  180. Fender Bassman 6G6A Intermittent HT
  181. EVH 5150 iii Schematics
  182. AMPEG Echo Twin ET-2 Question
  183. Low voltage Orange
  184. Marshall Mode Four MF350 Problems
  185. behringer gm 108
  186. Weird voltages in T50
  187. simple, but i need HELP AMPEG 115 amp
  188. 69 Marshall Super Lead blowing fuses
  189. 96 Fender Twin (PR266) Reverb Static Problem
  190. Getting a Hickok tube tester going again.
  191. Extra tap on primary side of power transformer. What is it?
  192. EVH 5150 III (5153) clipping with Wah
  193. Behringer BX600 optocoupler?
  194. WAY high plate voltage in Fender clone
  195. BZZZZZZZT!!!! Suprise!
  196. Early Marshall 1987/Tremolo Standby Snubber Caps....?
  197. Silvertone 1482
  198. Never assume
  199. Bugera 6262 mod.
  200. 80s Fender Concert
  201. Marshall VS102R hum
  202. Fender Twin Amp - need help
  203. Dead Fender Stage 185-replacing thermisto
  204. 69 Laney socket arcing over
  205. australian transformer help
  206. Silverface Combo To Head Conversions
  207. 6V6 tube pin #1 stuck in tube socket...help.
  208. Ampeg BA115 busted?
  209. Stinky Hot Rod Deluxe
  210. Eden Metro 2 ohm load problem
  211. 1973 Fender Twin Reverb - Tinny Sharp sound
  212. Crate Blue Voodoo B60 abnormal signal distortion problem
  213. Fender Twin Amp Tremolo not working
  214. bandmaster rectifier diode type?
  215. Too Much Gain with ax84 amps build
  216. "Manufacturer bypassed" fuses - WTF?
  217. AVT-150 mute circuit
  218. PV 260c driver sub
  219. Randall RG100ESXP sparks and LEDs don't work
  220. Vox V125 Centre Tapped Pots
  221. Suggestions for Boogie Trem-O-Verb Problem?
  222. Possible dumb question alert:: OT Primary/Secondary impedance ?
  223. Crate head gx2200h channel problems
  224. Simulated Tube Rectifier
  225. Marshall Repair Newbie
  226. Silvertone 1474: Sounds like DC on a pot but...
  227. Marshall PROBLEMO!
  228. 1973 bassman 50 problem
  229. JCM900 Volume Fades
  230. Question about capacitor values and voltages....?
  231. Supro/Wards Airline GIM-9131A Tremolo
  232. Champ preamp tube oscillates
  233. Crate Volume Control Problem
  234. Bugera 333xl 212 combo problem
  235. Another Marshall Hum Problem - help!
  236. Heathkit
  237. question Polytone Mini Brute III / IV / M-PA
  238. Peavey TubeFex Pre Amp Error Codes???
  239. Help repairing Ampeg 1540 Crossover
  240. Hum - Marshall Valvestate VS265R
  241. 1975 Fender Twin 2nd channel distorting - Help!
  242. Hum in a Marshall
  243. Ampeg SVT 4 Pro power issue
  244. Crate Blue Voodoo 6212 Low Output
  245. Can Cap replacements for Traynor YGL-3
  246. Marshall AVT-50 volume drop-out
  247. Bugera 333xl-212 Issue AGAIN
  248. Vox Cambridge 30 Reverb Twin keeps blowing TDA2050
  249. Need 5B3 Deluxe OT recommendations
  250. Fender Studio Lead spares