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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Fender Twin Reverb Started smoking & popping... outlet overload?!
  2. Ashdown FA60 blowing mains fuse
  3. I let the magic smoke out of my fender champion 600
  4. Schematic for Crate GLX65
  5. Blues Deluxe Tube problem.
  6. Vibrolux Reverb Ticking Tremolo
  7. Peavey Classic 30 grief
  8. Blues DeVille Bias
  9. Marshal MG 100HDFX
  10. Peavey 260c Assistance/Insight needed.
  11. Marshall 100 watt 1x12 model 2150....no heaters?
  12. 1995 Blues deluxe channel switching problem
  13. Testing varistor
  14. Help reparing arc'd socket PCB on Fender Deville
  15. Need help changing an auto bias circuit to adjustable Crate BV50
  16. Fender "The Twin" - burnt resisitor
  17. Hughes and Kettner Warp X - Help
  18. Speakers in 65 original Super Reverb?
  19. 1971 traynor ygm3 risen from the dead, dying again
  20. Fender Hot Rod Delux
  21. Crate palomino v16
  22. Unusual problem...
  23. Bugera 333xl 2x12 combo - breakthrough hiss on crunch n lead channels
  24. So I'm poking around with my chop stick...
  25. Quieting an old beast
  26. Did my amp really fix itself?
  27. Simple rig to match mosfets?
  28. Sozo Amplification / Slow ?
  29. Signal leaking with all controls at 0, other questions about Traynor YBA-3
  30. SVT-VT volume and noise problem, help!
  31. Vox VT 50
  32. Crate BV50-H loud hum on clean channel
  33. Crate GT1200H circuit draw at speaker jack
  34. Vibroverb 63 Reissue Bias Pot Mod
  35. Deluxe Reverb RI Bias questions as not same as my BF Super Reverb and Problems
  36. Wish Enzo Well
  37. where to buy fender pots?
  38. Strange overtones on certain low notes.
  39. A line out after PI in a princeton reverb
  40. Hartke HA3500 C401 Venting- Help Please
  41. MusicMan 4x12GS EVM 12L speaker trouble
  42. Yamaha Amp troubleshoot
  43. Cheap a$$ tube checker?
  44. Tone stack ?
  45. Ampeg SVT-VR turning on and off
  46. qsc rmx 2450
  47. Marshall AVT50 eating fuses
  48. SS "Whirlitzer" clone too fast!
  49. Reviving 1978 Lab series L3
  50. Mackie swa1501 copper trace damaged
  51. Kustom K50 Trem/Vibe not working
  52. Marshall Valvestate 8100 Effects Loop question
  53. Peavey Deuce eating fuses
  54. 5f1 problems
  55. HELP! Marshall G50CD booster sounds horrible.
  56. 135W Fender Twin is slowly burning up phase inverter tubes after a recap.
  57. Orignal '65 Fender Blackface Deluxe - Low bass .. .muddy.
  58. VH-140C little or no signal without jumper in effects loop
  59. Marshall DSL-50 fried lineup of B+ resistors in preamp ?
  60. Beloved Little Marshall MG15CDR Severely Ill, Please Please Help!
  61. small amp speakers
  62. Hughes & Kettner ATTAX 100 effects fail
  63. Crate BV50-H repairs?
  64. Ampeg BA115 input jack issues
  65. Mystery problems SVT 4 Pro continues
  66. Peavey TKO80
  67. 73 Silver face Twin Reverb hum balance pot observation ?
  68. Fender Bassman 200 Q10 & Q11 Quite Hot!
  69. Fender Red Knob Dual Showman is Killing Me
  70. Vintage OR80 with standby switch on OT CT... change it?
  71. Diving in... do you like you mikev med or rare?
  72. My Marshall G100cd Distortion channel doesn't distort like it use to
  73. Peavey TB Raxx - Transformer Secondary winding
  74. Fender Hot Rod Deluxe Drive/More Drive switching problem
  75. traynor ygm3 high plate voltage
  76. Mesa Triple Rectifier... trouble shooting
  77. cooked '66 deluxe reverb power transformer....wondering why??
  78. Peavey Valveking feedback troubles
  79. SWR Blonde On Blonde help please!
  80. Need help T-shooting a fender SS
  81. Need help with Marshal 2203l PI pin voltage specs
  82. Help with OLD to NEW Varistor Rating
  83. Advice on Hartke 3500 bass amp repair--power amp module
  84. Hot swapping tubes ?
  85. 2 channels blending when they shouldn't be?
  86. 1983 Fender Concert 1x12 buzzing
  87. Randall Rg100 head gain problem
  88. amp smoking...
  89. Princeton Chorus - No reverb
  90. Spike in B+
  91. Behringer dual 31 band eq issue
  92. DC heater question (Randall RG50)
  93. No sound from Fender Blues Deluxe Reissue
  94. Spidervalve 212 blows 500ma HT fuse
  95. Preamp filter stage question
  96. Line6 flextone II HD output section
  97. building the cab to pair with tiny terror
  98. AMPEG SVT-CL rewiring for 220V and other issues
  99. Onboard Tube Amp Bias Setup
  100. Digital effects board
  101. Peavey Classic 50 repair
  102. SWR SM-900 - no signal at preamp. Anyone got a schematic?
  103. 1997 Fender Vibrolux rattle sound!
  104. orange thunderverb
  105. Peavey Encore 65 blows fuse
  106. Peavey 5150 combo OT specifications
  107. SVT 7 pro no speaker output
  108. Should I buy this amp?
  109. Peavey Mace 320T
  110. Solder prices...
  111. Peavey Studio Pro 112 Transtube Red Stripe Hum
  112. Marshall 2098 Solid State Lead 100 Repair
  113. 1978 fender twin reverb problems...please help
  114. Ampeg SVT4 pro blown power channel
  115. Fender Stage 185 not making any sound
  116. Fender bandmaster
  117. troubleshooting low volume on a tube amp...
  118. Fender Princeton Reverb Silverface crackling
  119. Polytone Mini Brute II Problem
  120. Peavey Classic 30 - Speaker Short
  121. Fender 5f1 volume loss, overly compressed
  122. Hartke bass cab,input problem
  123. New Build... When the tone control is dimed I get crackle and volume diminishes.
  124. Tech soldering question ..
  125. danelectro honeytone amp.
  126. Bugera 333xl 212 Static and Popping
  127. Feedback in reverb Bandamaster Reverb AA1069
  128. Crate GX-212 Need Reverb Tank Part Number
  129. Peavey XR560 PA head
  130. 66 Fender Bassman hum
  131. Rose Morris AC30 Hum
  132. Fender roc pro 1000 help
  133. ho HUM... hum is driving me nuts
  134. mystery output transformer impedance
  135. SVT 4 Pro hum
  136. amp and speaker ohm help
  137. Blues Junior Buzz
  138. Recapping Filter Cap Clamps
  139. 450+ plate volts from 360v source @ the rectifier???? 6v6 amp
  140. Epiphone Valve Standard - Dropped --> VERY loud Whine/Hum
  141. Speaker switching suggestions for Vox
  142. high pitched squeal from my peavey XXL combo?
  143. 3 amps, same fault in one week: arced-over power tube sockets
  144. Problem with Valvestate 8280
  145. Help with switch wiring Vox V125
  146. Carvin x 60 b problems
  147. Trying to fix a broken Carlsbro Cobra 90 Series "Sherwood" amp
  148. VOX VC4 Foot Controller for Valvetronix (broken bus jack)
  149. Peavey Mark III Bass Head
  150. MArshall AVT 150H inadvertent loss of gain and high pitch squeals.
  151. 92PU06 Crossover?
  152. Magna Electronics Co. Melodier Model M-194-4-J bad OT?
  153. I thought speaker mounting holes were standardized?
  154. Peavey Valveking blows fuses
  155. grounding a 6.3V CT to reduce hum
  156. Best High Quality E- Caps
  157. ampeg reverbrocket2 ps voltage problem?????
  158. Ampeg SVT-400T Thump/DC On Power On
  159. Vox V125 Assistance?
  160. Marshall jcm 900 2100 noisy buzz/hiss/squeal
  161. Vox AC30cc2x HT Fuse Holder
  162. Ampeg Gemini VI - Can't Crank It
  163. Bugera BVP5500 fault
  164. Guya-tone GA-830. Low output.
  165. 73 Super Reverb RIZES from the dead
  166. Marshall G15R CD Has a Hum Increased with Second gain Increase????
  167. Problem with Boogie MkIIa
  168. Vox Royal Gaurdsman - normal channel low volume?
  169. Bad Sozo caps???
  170. Fender Twin amp won't power on
  171. Marshall 5212 Split Fifty Problem
  172. good place to insert an effect loop
  173. Amp fuses
  174. Randall RH200 - Unknown Resistor
  175. High Power Resistors Getting Hot - Too Hot?
  176. Help with Vox AC30 CC2
  177. Enzo, MarkusBass, and other SVT 4-Pro Masters
  178. Bugera 1990 help
  179. Princeton Reverb rebuild
  180. How do I test an adjustable voltage regulator in my guitar preamp?
  181. Setting up a 66 blackface for bass
  182. Super reverb preamp pin voltages
  183. Recommendation for oscilloscope test leads for guitar amps.
  184. cathode bypass caps voltage in princeton reverb
  185. Trouble with Mesa Stiletto Deuce
  186. Peavey Triple XXX Head has strange problem Please Help
  187. Bugera 333 Channel Switching Circuit
  188. Yamaha MagicStomp
  189. Fender M-80 Combo amp Mods or revisions on power supply or circuit?
  190. ADA MicroTube Output Design
  191. Tremolux 5G9 - tremolo not working
  192. Trace Elliott Commando killing output transistors
  193. Advice about multiple circuts
  194. Sunn Beta Bass preamp troubles
  195. Audio generator recommendation for n00b.
  196. Fender M-80 Combo amd 1x12 needing a schematic
  197. 73 Super Reverb
  198. Peavey Ultra (Mega) combo problems
  199. Fender Twin Reverb Reissue distorted reverb
  200. Ampeg "Joey"???
  201. Traynor Guitar Mate Reverb
  202. Spider jam schematics
  203. Have I killed my output tranny?
  204. Troubleshooting by Tube Substitution a Fender Twin Reverb
  205. Operadio pia125
  206. elevated heater center tap
  207. Fender Blues Jr III - FX Loop negates reverb
  208. MESA Mk3 reverb question
  209. Jcm 900 mkiii direct line out buzz
  210. Peavey Classic 50 Main transformer
  211. Transistor Crossover part help
  212. Bassman 200 Power Transformer?
  213. Peavey Classic 50 50 Power Amp Bias mod/repair
  214. Blackfaced Fender Twin Reverb Master Vol buzzing
  215. Fendet twin reverb osillating when the reverb depth is increased
  216. ADA MicroTube 100 Popping Fuses
  217. Peavey Studio Chorus smoking resistor
  218. Carvin X-50B with glowing second grids of EL34
  219. taking the blanket off a Valveking...
  220. Fixing my Peavey rage 158. What kinda pots and any mods while im in there.
  221. GMX212 Doenst record my presets!
  222. Crate Vintage Club 30 Squeal
  223. The Peavey 6505 and a New Failure Mode
  224. Fender Bassman 135; what to do with that voltage divider?
  225. How do you find a break in a cable?
  226. JC 120 wont turn on help please
  227. Marshall jcm 2000 dsl blowing ht fuse.
  228. Hot Rod Deville BAD Oscillation On More Drive
  229. Silvertone 1471 rehab
  230. Old panaramic amp, reverb and tremolo issues
  231. Help troubleshooting treble pot issue
  232. Ampeg V2
  233. Power trans "gurgling"
  234. CompuBias readings on 1974 Vibrolux... does it seems "cold"?
  235. Marshall Valvestate 2000 avt150 fuse help plus.
  236. Marshall JCM2000 Power Transformer - Taps For 220V?
  237. Mesa MK IV footswitch system
  238. Koch Amp burnt PCB
  239. Fender Hot Rod Deluxe Reverb Buzzing
  240. Hot Rod Deville With Harsh Crackle/Distortion
  241. Crackle in Marshall VS100
  242. Peavey Bass Mark III 400BH won't power on
  243. SVT4-pro question
  244. Marshall Valvestate 8100 / 8080 Shorting Output
  245. replacing 2 prong ac cord
  246. While biasing a Fender Tremolux (AA763) the biasing is current is increasing?
  247. FX loop buzz only when unplugged again
  248. Valveking troubles
  249. short bursts of hi freq squeal?
  250. Marshall DSL 100 overall volume issue