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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Replacing caps in Magnatone
  2. polytone brute bass amp back again....
  3. Line 6 AX2 Power Transformer Hookup
  4. Pp el 34 ht waaay too high!
  5. repair question: Tremolo Silvertone 1484
  6. Fender Twin Amp tremolo lives again
  7. Cooked power tranny? (Vibrolux Reverb)
  8. 36 coupe filament problem
  9. Crate GX-120 problem
  10. Marshall JCM-800 "clipping diodes"
  11. Making a footswitch for MG15MS15ZW
  12. too high filament voltage and weird scope reading
  13. JCM 2OOO tsl 602 "won't switch channels"
  14. CE1000 CE2000 int audio
  15. 63 Deluxe questions
  16. Marshall Troubles
  17. Hartke 3500 Mosfet - Powering on, but not much more
  18. Peavey Delta Blues - Blown Fuse (2x now)
  19. Bugera 333xl-212 sound fluctuations
  20. Reverberocket R212R problem
  21. Peavey Classic 50 with Reverb problem
  22. Peavey KB100 Horn Source?
  23. Behringer BX1200 - no sound :(
  24. When a Death Cap Commits Suicide...
  25. Fender Dual Showman Reverb amp. Noisey
  26. Hotrod Deville 2X12 volume increases for a few seconds
  27. Seymour Duncan Convertible with popping noise
  28. JCM2000 - How hot is Too Hot???
  29. Multi-section caps last longer?
  30. Weird "Ground Potential" Experience
  31. older mosfet Trace Elliott unreliability
  32. Identify a modern Cap
  33. Extremely low bias reading, blown fuse/tube in a Valveking after bias pot install
  34. Help with SF Fender Twin tremolo (ultra linear model)
  35. Help with Sunn 200S
  36. SWR Workingman's 10 -- plays for 20s, then dies
  37. amp teck help requested
  38. 5E3 volume noise
  39. Solution to dealing with loose notes
  40. Wax Spilled in Amp - Removal Ideas?
  41. Hot Rod Deluxe channel switch problem
  42. Hot Rod Deluxe channel switch problem
  43. Anybody have a pic of a Fender Concert IIs input jack wiring?
  44. Vibrolux B+ drops by HALF at practice space
  45. silly question about standby switch
  46. New power tranny: rectifier and power lamp blow (Silvertone 1482)
  47. Fender BF Twin Rev Tremolo
  48. Markley CD-120/JMF Spectra Channel Switching
  49. Bizarre 5150 volume problem
  50. Magnatone 280 B built, vibrato questions
  51. Peavey Tour 450
  52. Boss Me-8b and Boss GT-6B Repair Help
  53. Help with a Line 6 Flextone
  54. First post! need help getting a PT back running!
  55. Hum in Triode mode
  56. Eden WT-300
  57. Single Rectifier without power tubes
  58. Peavy Classic Deuce 2 Guitar AMP on switch
  59. Crate VC2010 problem
  60. Fender M80 Chorus Help!!
  61. Crate hybrid
  62. dsl 100 motherboard good in 2007 model?
  63. rectifier???????????????caps????????jtm 60
  64. dsl 50 schematic for 100? work?
  65. Peavey studio pro 112 (redline version)
  66. Fender G DEC Jr Transformer
  67. bugera 333xl no sound
  68. BF Bandmaster Vibrato 'motorboating'(?)
  69. marshall dsl 100 bias running loose 2007 model
  70. acoustic 370 EQ questions
  71. Need black/white pointer knobs for Champ 25.
  72. Gibson GA19RVT Tremolo problem
  73. Fender Frontman 15G aux problem
  74. Crate VC120 no power
  75. Randall RG200 Valve dynamic burning heater resistors
  76. Fender Pro Tube Twin Low Output
  77. PS Filter Capacitors
  78. full schematic SWR workingsman
  79. Marshall MGDFX100 & 30DFX please help
  80. Marshall AVT150 Blowing fuse
  81. BF Fender Bandmaster problem
  82. Ampeg V4B-AV
  83. 60's Ampeg Reverberocket II no clean headroom
  84. Marshall avt50 unstable
  85. Help with a Tweed Champ first build?
  86. Problem With Mesa Studio Preamp
  87. Marshall 4140 Faceplate
  88. swr 550x input jacks
  89. Enzo, I fixed the Acoustic 270, but why?
  90. Yamaha EMX660
  91. problems with 5150 combo
  92. Marshall DSL 100 No Reverb
  93. Blues Deluxe strange hum problem
  94. Noisy Peavey EVH 150
  95. Hiwatt DR-103 Clone PI Issues
  96. Stone SGT60 drawing way too much current(blowing fuses)
  97. Acoustic Model 109 (G60-112) help
  98. Fender 30 ticking
  99. Fender Twin Amp Jumping Channels
  100. Mesa DC-5
  101. Verb tanks
  102. Marshall TSL122 Re-Cap
  103. Fender Showman Help- LOUD Hum
  104. Gibson GA 30 RV Loudness issue...
  105. Carvin XV-212C help
  106. Concert Bias
  107. AVT 150H Replacement Parts
  108. H&K Switchblade schematics?
  109. Fender Deluxe 85 Volume Issue?
  110. Transformer testing
  111. el84 Bias 9V at grid enough?
  112. SWR 350 hum problem
  113. B2Re Ampeg don't let me play
  114. DRRI 6V6s red plating
  115. Blues Junior Power Up Crackle
  116. Bugera 333XL popping noise
  117. Hot Rod deluxe motorboating in drive channel
  118. Peavey 6505 bias and grounding issue
  119. OT? vibrochamp..newb help please?
  120. Fender Twin Amp - Gain channel sucks, clean channel has limited Bass
  121. Sunn Model T rectifier diodes
  122. Ashdown 500 EVO blowing fs3 fuse
  123. gallien krueger MB150S
  124. Behringer BXL 1800A finally working
  125. Speaker coil for dummy load?
  126. Odd microphonic problem
  127. Marshall TSL100
  128. Dumble clone transformers
  129. 5Y3 Red Plate Special
  130. New Fluke Multimeter recommendation?
  131. Capacitor codes?
  132. torque t100 ga
  133. VHT amp problem
  134. Ampeg VT-40, has no sound...
  135. power/standby in one switch?
  136. Bogner XTC FX loop volume and tone drop
  137. Hartke HA3500/VX3500 combo troubleshoot.
  138. Fender 65 DRRI "squelching" noises . .
  139. 67 Vibrolux Reverb - Distortion/no signal???
  140. delete
  141. Line 6 Flextone help
  142. trace elliot 715x dead
  143. Marshall Valvestate 8280 Problems
  144. # 0990775 fender output transformer ??
  145. Vibrolux Reverb volume at zero
  146. Fender Bandmaster/Showman mod reversal
  147. Acoustic 470 PA
  148. Fender Stage 160 Instantly Blowing Fuses
  149. Help need jtm60 amp guru>>>>>>>>>>>>>
  150. Fender Princeton Reverb II troubleshoot
  151. Marshall MG50DFX
  152. HIWATT Amp Problem
  153. Blues Deville 4x10, flooded, no reverb
  154. SWR Workingmans 15" humming
  155. ampeg VL 1002
  156. Peavey GPS 900 pwr amp
  157. epiphone special
  158. Need help finding output transformer for Gibson BR-1 amp.
  159. Problem with +/- 15 supply to op amps
  160. SOVTEK Midget 50 Head blowing main fuse
  161. Princeton Reverb problems
  162. Allen Accomplice actin' funny
  163. Orange Rockerverb - Reverb -real 'bong-ie' sounding
  164. Crown K1 Volume Pots
  165. Flash Upon Power Up
  166. Behringer PMP3000
  167. Blues Jr. reverb problem
  168. Peavey 400BH blows fuse
  169. Fender Bassman Blackface '64 restore
  170. How to determine faults
  171. Problems w/ Hiwatt lead 50 head
  172. Ampeg v4-b problems
  173. PEAVEY - Rage 12 Watt - Problem
  174. Peavey Combo 300 problems
  175. What parts to save?
  176. Celestion G12T-75 Speaker Rattle problem
  177. Traynor YBA-1A...low distorted output.
  178. Strange preamp voltages in a Gibson GA-5 (like 5F1 tweed Champ)
  179. Fender Sidekick 35-Reverb Troubles
  180. Classic 50/212 Mod Trouble
  181. Fender Twin Reverb Silverface Repair Issue
  182. Fender Blues DeVille Hiss Problem
  183. boogie studio 22+ power transf substitute.
  184. Marshall Super bass red plating
  185. JCM800 6550 tube substitution and fuses
  186. Crate CPB150
  187. Fender Super-Sonic Driving Ground
  188. LR Baggs Acoustic Reference
  189. Crate G130cxl chorus "rate" pot value
  190. JCM 600 troubles
  191. How does a Tube Rectifier fail?
  192. Peavey Basic 60 Static
  193. Ampeg BA-115 Style Switch Cuts Out
  194. Noisy Silvertone 1484
  195. what's my next step up in solder irons?
  196. Peavey Artist VT,,need some help!
  197. I accidently installed a helicopter in my dumbleator!
  198. Marshall AVT150H losing power in OD2 channel
  199. Fender Blues Deluxe Components Source
  200. Buzz when touching polepieces
  201. bugera 333xl back with new info
  202. Amp Problem
  203. Peavey Classic 50/50 issues
  204. Fender Champ problems
  205. Fender Blues Deluxe Help
  206. Peavey Deuce SS preamp section
  207. Can I slow down this trermolo? - GA-5T
  208. Heath ta-16
  209. stuck rail
  210. Please tell me why I got a horrible shock
  211. Ampeg VT120 Acting Funny
  212. mesa boogie become monophonic
  213. Kustom 200 question
  214. New Peavey Vypyr 15 (problem?)
  215. Music Man 210 (chasis 2275-65)
  216. Peavey Minx 110 cutting in and out
  217. Roland JC120 issues
  218. Boogie - odd voltages
  219. fx loop sucking tone
  220. Marshall wires dsl 100
  221. volume drops, then goes. help?
  222. Peavey Express 112 Sheffield
  223. Best 30-40W tube design?
  224. Marshall MG 15 DFX and Valvestate VS schematics
  225. Madison Divinity II Head volume problems
  226. Gallien Krueger 700RB II - Bad Ground
  227. JCM 900-4100 preamp question
  228. Test equipment......
  229. Peavey Mace doesn't power up anymore
  230. Marshall AVT275 - No Sound From Main Speakers
  231. marshall vs 100 need help
  232. PIN Chart/Diagram
  233. 12dw7/ecc832
  234. Peavey TNT 100 Problem/ Questions
  235. Hot Rod Deville 212
  236. Fender Sidekick 35- transformer substitution
  237. Keyboard - Internal Zip drive
  238. 1966 Bandmaster and 60Hz hum....?
  239. Fender performer 1000 ( PR 209)
  240. Peavey XR 680c Volume cuts&Jumps
  241. HR Deville problem....?
  242. Late 90's Peavey Transtube Supreme repair (power transistor questions)...
  243. Stage 160 pre amp into FM 212 power amp question
  244. Fender Blues DeVille Faceplate?
  245. Thanks For The Help!
  246. MPSU95 sub?
  247. Transformer testing?
  248. New 5150 owner, need some help
  249. Peavey Duel 212 problem
  250. AC30SS hi-res schematics