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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Ampeg VL-502 and Lee Jackson GP-1000 Preamp Problem, Help Please
  2. B52 AT100 Bias Instructions
  3. JCM2000 Unusual low volume on clean channel
  4. Worlds best solder sucker
  5. 1/4" Panel Mount 4 and 6 Leg Through Hole Jacks
  6. Peavey XXX massive distortion
  7. Bugera help
  8. Has anyone every dropped and dented a transformer on the corner??
  9. Early 70's Equalizer with reverb box!
  10. Marshall ST1 Pcb
  11. Marshall Amps
  12. Classic 30 Dropping Resistor
  13. Marshall AVT100: DFX Not Working
  14. Fender bandmaster reissue r69 keeps burning up
  15. '61 Gibson GA30RV ... power problems
  16. Fender Princeton Reverb Reissue w/ hum problem at idle = bad rectifier
  17. 65 Deluxe Reissue Tremolo Not functional
  18. Peavey Heritage VTX....problem
  19. guitar amp dont have power no lights in panel peavey vypyr 75
  20. Trouble with 2006 Deluxe Reverb Reissue
  21. carlbro stingray bass head
  22. TSL Clean Channel Problem (sound coming out through with all controls on 0)
  23. Sunn Studio PA troubleshooting
  24. peavey triumph 60 problem
  25. Fender Hot Rod DeVille 410 cutting in and out
  26. Sano 50wr tremolo
  27. Ampeg VT40 problems
  28. VOX AC30TB reissue voltage selector
  29. Software based function generator
  30. Gibson GA20 (old, octal preamp)
  31. Gibson Thor bias?
  32. My music man 65 is driving me nuts Hums even with out tubes fuse blows
  33. Ampeg G-15 Reverb Help
  34. Marshall jcm 2000 problem
  35. AMP BH-260 Low Output
  36. AC30 CC2 crackling...?
  37. Marshall tsl bias range too high at lowest setting. Resistor change?
  38. Marshall 2205 very bright- drifted R9 resister?
  39. Ampeg vintage svt help - need replacement hum control pot
  40. Peavey 6505+ schematics
  41. silent swr workingman 15
  42. JCM 900 2100 w/ potential blown PT
  43. RC4558NB
  44. Mesa Solo 50 Head - Low-ish Output
  45. "The reverb doesn't work. I think it has dirt in it. You should maybe try...
  46. New eyelet board + complete parts kit for AB763 / Deluxe Reverb
  47. Scratchy soundingPots
  48. Crate CR-165B amp ?
  49. Noisy Reverb on Rivera R55-12
  50. Peavey valveking 100 head blowing the fuse for the 14V circuit
  51. Marshall G80RCD trouble
  52. Peavey Bandit 112 problem
  53. Peavey XR-1200 / CS-400 Blowing Fuses and Power transistors
  54. Know a good 8" speaker??
  55. Biasing peavey windsor
  56. 1 pair output tubes rapidly draw excessive current
  57. Its me again withe the old peavey
  58. No Sound, hum, or hiss from SLO Clone
  59. Oscillation help
  60. Valvestate 100 OD ch issues
  61. Marhsall jcm2000 DSL-401 - footswitch won't switch between od1/od2 (front panel will)
  62. Fender Hot Rod Deluxe question
  63. Is anyone intrested in helping me get an old peavey running?
  64. got power light on but no sound?
  65. Weird Vibrato oscillation in a Princeton Reverb Clone build
  66. Fender Super 60 Reverb Tank Replacement
  67. Fender Super 60 Input Jack Repair
  68. Crate B160XL problems...
  69. Mesa Boogie Mk4 Slow to warm up
  70. Need help identifying this amp
  71. Please Help me fix my Marshall G30R CD (similar to MG series)
  72. Another Hum problem in a SE tube amp
  73. Replacing PS board in B-52 AT-100
  74. Bugera 333XL Is my tubes bad or is the internals gone bad?
  75. blackheart little giant head tube retaining clips
  76. Peavey 260 C (1978 model) buzzing
  77. Vactec E Vactrol Cell / Ampeg ?
  78. Peavey Classic 50 2x12 mishap
  79. 1982 JCM 800 2204 problems
  80. Brands of solder
  81. SWR Workman's 15 Bass Combo (buzzing / Fuzz noise)
  82. Gibson GA-5T Tremelo not working
  83. Tons of Free Amplifier Schematic Diagrams
  84. Bogen CHB20A project to much bass
  85. 'Laney Klipp 60' keeps blowing the same power tube.
  86. Marshall V100 valvestate footswitch not working
  87. Ashdown Five-Fifteen 100w combo keeps blowing fuses. Help me?
  88. Ampeg BA-210 SP
  89. MF350 issues (yes i searched)
  90. Little mustard caps
  91. Blue Voodoo 60: One power tube getting NO CURRENT!?!
  92. Cant Find Dg212bdx dip-16 analog switch for marshall mg30dfx
  93. Marshall Mode Four channel problems
  94. Sunn Coliseum-300 Folding Early
  95. Bugera 333XL stuck in standby???
  96. Tremolo bug in Epiphone EA-26 RVT
  97. 1964 Fender Bandmaster with 4 6L6 tubes ?
  98. Peavey Heritge VTX
  99. jvm410h -=-=-=-= jrc-23fhs relay question
  100. Odd voltage reading...
  101. Fender Super 60 optoisolator
  102. 5150 Head post gain volume has no effect
  103. Amp Tripping Circuit Breaker in Practice Studio (but nowhere else!)
  104. Ampeg G15 Reverb : What next?
  105. Help with intermittent reverb diagnosis: '65 drri?
  106. Vox Buckingham distortion
  107. Brownnote 18watt lite - Some strings tend to overload the amp
  108. Peavey Classic B supply drift.
  109. Is this what blocking distortion sounds like?
  110. Crate CR-165B ?
  111. Bassman circuit question
  112. trying to revive a fender 160
  113. Bassman NFB and other problems
  114. Thomas Vox SS Royal Guardsman - repair shop near Baltimore?
  115. Carvin MTS 3200 Master Tube Series - Reverb and other ?s
  116. can someone tell me part # for this
  117. Fender pro 185 repair trouble! Please help!
  118. Power transformer size question
  119. Fender pro 185 help needed - trouble with r175 & r176
  120. 5F1 hums, quiets down when volume at maximum
  121. Reverb is broken, help?
  122. replaced PT and now major hum
  123. Silverface Bassman 50 questions
  124. A fake guitar for your test bench
  125. Hiss / Hum / Noise in my FX-Loop: Error in schematic, or layout?
  126. fender sidekick 65 bass amp recurring problem
  127. Silverface Deluxe loud
  128. SF MV Twin Reverb 120 HZ hum in reverb circuit
  129. Silverface Champ Shriek/hum, overheating issue?
  130. Univox model 400 blown speakers
  131. 69 Twin Reverb Crackle
  132. Marshall MG100 HDFX broken input jack
  133. Kustom 2-15C-1 bass amp
  134. Help with a silverface champ
  135. Princeton Reverb
  136. Deluxe Reverb Reissue, No bass from channel 2 ????
  137. Mesa tripple rectifier solo head mods.
  138. Vox Kensington V1242 "G" tuner.
  139. Samick SGA120 issues
  140. acoustic 140 loud pops when tapped & bass pot noise
  141. deluxe AB763 problem
  142. Volume issue with Fender Tweed Princeton
  143. SVT 1000
  144. Spitfire Clone Noise
  145. Peavey Combo 300 won't turn off
  146. Sound City 40c Mark 6....dead?
  147. Hot Rod DeVille clean mode has no volume
  148. 1965 Deluxe - static (occasional)
  149. Mesa Boogie Vtwin preamp; PSU?
  150. Damage to Output Transformer?
  151. Iv'e got a Matchless chief that is fluttering when i turn volume up
  152. suitable replacement power supply
  153. what transistor can I substitute for a C4382?
  154. Acoustic 320 blows fuses. Expert advice needed..
  155. Cathode resistor heat
  156. Peavey delta blues
  157. Harmony H303A amp
  158. weak tremolo in Silvertone 1432
  159. Fender Bass Rumble Amp crackling?
  160. Marshall MG100HDFX Blown Fuse
  161. blues junior volume is low then cuts in loud at 7
  162. Which Rotary Switch?
  163. Mesa SOB Blowing Fuses
  164. Define "leaky" caps...
  165. Peavey Triple XXX Not switching to Clean Channel
  166. Broken Spring Reverb, Could this be the problem?
  167. Noise name in english?
  168. Amp tone help
  169. Fender Silverface Bassman 10 isn't working. I need help fixing it!
  170. Boss MT-2 Fades
  171. Twin Reverb master volume PLEASE HELP
  172. Bugera Alchemist Schematic.
  173. o/p jack wiring of ovation legend 1717
  174. Help! Bias Confusion!
  175. Question about filter cap in ancient amp.
  176. silvertone 1484 no sound from channel one
  177. Feelers out: Line 6 Spider 3 main DSP board?
  178. is this power transformer toast?
  179. Need some expert troubleshooting advice
  180. MS8 Midi switcher Glitching problem, Need help from the wise man
  181. Power tube current draw changes unevenly over time?
  182. Ampeg B2R intermittent
  183. Sound City not enough negative voltage for biasing.
  184. Fender Silverface Twin Hums after PT upgrade.
  185. Input very sensitive, can hear noises through cable as it moves or taps anything..
  186. Peavey Classic 30 head with humming reverb.
  187. Help needed with Laney CD 630 Mixer amp..Loud Cracking & Popping Noises..read on..
  188. sliver Sunn concert bass voltage problems
  189. Fender Hot Rod Deluxe general tube question
  190. Randall RH 100 trouble
  191. schematic & service manual free resource
  192. AC30CC Tube rattle
  193. The roaring silence...
  194. Another Crate SMPS issue (V100H)
  195. Studiomaster 300 8.2 Powerhouse. Powers up fine but no sound from output.
  196. Flying components...
  197. Twin Reverb Speakers
  198. EV 7200 power amp
  199. Peavey 5150 no sound, tubes not glowing
  200. SVT-2 Pro
  201. Rectifiers for Princeton
  202. 5F6A Clone Blew Main Fuse
  203. Hiwatt DR-504 Bias Circuit schematic
  204. Bias probes- ma vs. mv ?
  205. AVT 50 Footswitch circuit damaged
  206. Peavey 5150 Mark 2 Hiss/White Noise problem
  207. Source for a PT for a Marshall 9005 Power Amp (other than MM)?
  208. Roland GA60 schematics please
  209. Marshall MG250DFX Problems
  210. WHat rateing transformer goes in a mx2442a behringer p.s.
  211. Fender Champ 12 transformer very hot
  212. Scratchy trem intensity pot: How best to proceed?
  213. Ampeg BT 25v Schematic
  214. Estimate for Hiwatt DR-504 repair
  215. No Dirty Channel on Marshall VS100 Head
  216. Polytone Mini Brute lll, lV, M-PA schematics
  217. Peavey Encore 65 Amp. No Sound?
  218. Fender Blues Deluxe Reissue buzz/crackle
  219. Gallien krueger Backline 250 bass head radio-like noise problem
  220. Allen & Heath RPS11 random fuse blow issue
  221. newbie help
  222. Marshall VS102. Is it supposed to be this loud?
  223. Marshall JVM410C, messed up channel levels
  224. Help! smelly yellow smoke!
  225. Marshall Valvestate 102. How to test reverb tank?
  226. audio centron Mp1200 power amp
  227. Tube (?) Issue with Fender 1998 Tweed Hot Rod Deville 410
  228. Peavey Bandit 65 volume fade.
  229. Silly Doubt JCM900 Dual Reverb 2x12 Combo 100W (5881)
  230. Fender Princeton Chorus - 1988 Loud HUM from speakers
  231. Vox Buckingham Reverb Tank
  232. What fuse to use in vintage Danelectro amp?
  233. Ashdown EVOIII 500 Head - Constantly muted
  234. 6L6WGB sub for 6L6GC
  235. Line 6 Spyder Just Hisses
  236. Tube Amp Crackle - input
  237. Intermittent Reverb Fender HRD
  238. Deluxe VM
  239. Quick and easy OT testing
  240. Hiwatt DR-504 oscillation; presence control
  241. Sessionette 75 problem.
  242. Marshall JCM TSL100 problem
  243. Help:ampeg svt 2 pro 100v>>240v
  244. 65 Fender Reissue
  245. Rumbling Marshall 5210 combo, HELP !!!
  246. Concertina Circuit Question
  247. EL84 Plate Voltage Oddity
  248. blue voodoo 120 problem
  249. Marshall JVM410C, messed up channel levels
  250. DR-504 missing original partridge