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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Gibson GA42RVT repair issues
  2. Blue glow on the inside glass
  3. 62 Ac30 Distorting :(
  4. peavey delta blues ?
  5. Marshall AVT150H channel switch popping
  6. Rivera K-tre too loud and hissing
  7. yamaha G50-112II
  8. Peavey XR1200 Repairs In Progress - Help Requested
  9. Ampeg B-2 Fan Trouble
  10. '67 bandmaster - intinsity pot for tremolo doesn't start working till about 5
  11. crate gfx-212 - bad input?
  12. G1 amp in Case
  13. Rectifier path of travel
  14. Marshall Valvestate 8080 big noise when starting up
  15. Mesa Stiletto problem
  16. Marshall Mode Four
  17. Ampeg SVT 5Pro Schematic
  18. Radial Headbone
  19. Anybody got a gut shot of a Gibson Ranger GA20?
  20. Mesa Boogie 50 Caliber + red plating
  21. Ampeg SVT 4 Pro curcuit breaker
  22. Ampeg BT25
  23. classic 30 with low volume and odd sounding distortion
  24. PV XR400b mixer/amp with 200 H power module low output
  25. Sunn Beta Lead power transistor
  26. Problem with a Mesa Boogie Dual Recifier
  27. mesa boogie 3 channel triple rectifier switching channels by itself , other noise
  28. FRED Diodes For A Kustom 200B?
  29. SF 135Watt: Dropping the B+ voltage, and bias mod
  30. Silly Questions from a Twin Reverb owning DIY Newbie
  31. Need a little help with a Laney Gh100L
  32. Broken amp, need diagnosis help
  33. Roland Jazz Chorus 120 "Schematics needed asap"
  34. Fender Princeton 65 DSP - Low Volume and Hiss
  35. Dead Vibrato: Fender Twin Reverb Reissue
  36. Reverb issues w/ a Peavey Classic 30
  37. Post In Music Electronics - Link
  38. help with a Kustom 200B
  39. Valvestate 8080 issues
  40. ill amp 'crackles' into speaker ?
  41. Acoustic Model 123
  42. Motorboating issue
  43. Fender Acoustasonic II SFX problem
  44. Hartke 3500 relay problems?
  45. VOX AC30/6 TB scratchy static noise
  46. Help ID a Mains transformer for 135W Twin
  47. Signal tracing rules
  48. Fender Hot Rod Deluxe won't play!
  49. Hot Rod Dlx Fizzy artifact!
  50. need help fixing my fender fm 212r
  51. almost a 6G6 build
  52. Tech-Caps???
  53. Crate GLX65 Question; Working Amp w/ no Sound from Speaker
  54. Marshall DSL 2000?? SO confused!!
  55. re:Peavey XR600B
  56. Taking the next step in my builds and repairs.
  57. Swr la series chirps on power up
  58. Tonefullness of one cap over another
  59. Low V supply issue Firebass 700
  60. LANEY VH100r Power tranformer buzz fixed ...
  61. Polytone - blown power transistor
  62. wave -like sounds
  63. marshall avt 150 h
  64. Crate GX-15R doesn't work - Any ideas?
  65. rca soldering
  66. Deluxe Reverb Mod or mix-up?
  67. Fender Twin Hum Hum Hum
  68. Major goof, major problem OT
  69. Crate V50 ?
  70. Ampeg SVT5 Pro
  71. High-Frequence Noise at Roland Bolt-30
  72. What Reverb Tank for a Yamaha Fifty 112?
  73. Power Amplifier Repair
  74. Problem with Fender Princeton DSP
  75. Peavey VTM 60 Blows fuse
  76. clean channel gone on my little Fender Champ 30 - fixable?
  77. Ampeg SVT 5 Pro
  78. redplate/biasing issue
  79. Behringer GMX212
  80. Amp/Guitar Temperature Sensitivity
  81. fizz and oscillation in Peavey Rockmaster head
  82. Classic 50 tube biasing?
  83. i have damaged my Crate VFX,please help..
  84. 6G12-A Concert clone behaving oddly
  85. Roland Cube 60 -- missing reverb
  86. Peavey Heritage VTX Series
  87. Blues DeVille reissue squealling preamp
  88. Substitute GZ34 for 5U4GB?
  89. Princeton Reverb Re-work
  90. No sound from speaker..?
  91. AC at pin 8 on a 6V6
  92. Pot replacement....I got "shafted"
  93. Keeps blowing the fuse
  94. Blues deluxe..same ole' problem
  95. Color coded capacitor
  96. Miscellaneous Question About Amp Damage
  97. Weber 6a14hp buzz when reverb is on.
  98. line 6 flextoneII hd head problem
  99. Ultimate Chorus
  100. Guitar Research T64RS TUBE
  101. Roland Bolt 60 reverb tank?
  102. Fuse Pops - Transformer Dead
  103. Orange rockerverb owners?
  104. Lafayette (or Univox??) U-80A mystery amp
  105. identify a transformer
  106. Bassman 100 - Should it be louder?
  107. Super Champ XD
  108. Amp Tech Needed in So Cal...
  109. Fender Princeton Chorus problems
  110. Marshall MG100dfx
  111. Marshall Super lead 1959 Problem
  112. JTM45 Build Buzz Problem
  113. Svt 4 pro tubes??
  114. Question about Marshall Valvestate 8100
  115. Marshall JMP 50 watt bias
  116. Traynor yvm-1 voice master acting funny - - -
  117. Fender Concert II problem ( preamp)
  118. Sticker on power tubes? Harmful?
  119. Need pot volume control for op pro preamp Ovation Guitar
  120. Marshall AVT150 Blown Fuses
  121. Diodes for a Twin
  122. Hiwatt Classic 50 Crackling when cranked
  123. NOS 6L6 vs Currently made 6L6
  124. More failed Jamicon 12,000u 80v
  125. Fender Super Reverb AA763 Bias
  126. marshall 8080 pot problems
  127. Need help with Fender Twin Reverb
  128. Vibrolux low volume
  129. Slightly off topic, but strange
  130. High voltage on pin 1 of V5 in '67 Super Reverb
  131. Powering vtl5c1 from heaters on SLO 100 ?
  132. Fender Twin loud reverb hiss
  133. Awful noise from Fender Bantam Bass
  134. power noise parkg10r amplifier
  135. HomeBrew Troublshooting Help
  136. Silvertone 1484 help needed
  137. PEAVEY BRAVO 112 crunch channel bad switch?
  138. 78 Crate CR-1R, 72 Gibson G20, 2006 Randall RG 100 G3 100 watt valve dynamic
  139. Ampeg svt cl hum issues
  140. Polytone Mini Brute lll, lV, M-PA
  141. Need help trouble shooting peavey xl-500 mix amp
  142. Serious ?grounding? problem - kind of scary...
  143. Silvertone 1484 diode substitutes
  144. Trouble with Peavey Backstage 110 amp
  145. '67 Ampeg Jet, no trem & high voltage
  146. Buzz/click!-dead when switching off standby
  147. New Matamp schems
  148. Where to get replacement parts for a Fender Twin Reverb?
  149. Phase linear 700b help!
  150. Complete newbie to amp repair
  151. Peavey TNT Fuse blowing
  152. Park G10 amp at 4Ohm Speaker?
  153. Need schematic for a Crate VC6112
  154. Crate Blue Voodoo 120H acting up:
  155. Mesa DC-5, Massive Hum on Clean Channel
  156. My gibson amp
  157. Peavey Classic vtx series- Troubleshooting repair help needed!!!
  158. fender studio lead amp problem
  159. Dear god not the Selmer again... & PPIMV...
  160. Peavey VT Classic 212 Broken Phase Help
  161. Yamaha G50-112 owners manual wanted
  162. marshall atv100 have no distortion?
  163. Palomino V8 loud hum.
  164. 5e3 volume interaction
  165. SWR workingmans 15 Frying resistors
  166. 59 Bassman reissue cuts out after 10 minutes
  167. Crate Vintage 30
  168. peavey 5150 212 won't power on
  169. SVT 350 XLR out HUM
  170. 65 Twin Reverb Vibrato Problem. Please Help
  171. Ampeg SVT-6PRO death & resurrection
  172. Sunn Sceptre
  173. Blue Voodoo clean channel hiss without volume
  174. Peavey Ultra switching pops
  175. peavey400bh
  176. Princeton speaker rattling in the breeze
  177. solder type ????
  178. Randall RG200
  179. Fender Pro Tube Pro Reverb - Dead Tremolo and Noisy Reverb
  180. Fender Bassman
  181. Ampeg VL502 problem
  182. Power xfrmer wire color? Help!
  183. Could someone explain how this amp was working?
  184. fender stage 100 dsp 112 combo
  185. Peavey KB60 acting up
  186. overheating resistors
  187. please tell me its not a crate
  188. 5150iii channel two compressing
  189. Randall RG50TC problem
  190. how dangerous are floating ground amps (old Supro)
  191. volume loss Crate V32
  192. volume loss Crate V32
  193. Fender Stage 100 DSP
  194. Squire Champ 15/Fender Frontman 15(R)
  195. svt 4 pro going mute
  196. VHT Pitbull 50/12 Issues... Help!
  197. Peavey Studio 210
  198. B-52 AT100 very low volume/fuse blows when standby turned off
  199. Behringer GMX212 amplifier problem
  200. anyone have pic of cts alnico 10' speaker?
  201. Peavey Transtube Supreme Schematic
  202. Help me understand
  203. Channel 2 Fading Out
  204. 61 Reverberocket Reverb Problem
  205. More on Marshall TSL100
  206. Switched Tube Consequences?
  207. Can pulling tubes out one at a time help you locate hum?
  208. Burning 6L6 screen resistors
  209. Please help Marshall jmc 800 (2205) loud hum running out of things 2 look 4.
  210. Ampeg B4R Issue
  211. Replacement power transistors for old JC-120?
  212. Bridge Bad, Would You Replace Regulators?
  213. Diode question
  214. 59' reissue troubles, cracks and hisses
  215. Working Man's 12 blows fuse
  216. barcusberry 1601
  217. Mesa Express - Switching the transformer
  218. Wrong Transformer in Vibro Champ?
  219. Musicman 130 (2275-130) problems
  220. Locating loud hum/noise
  221. Damper diodes as rectifiers
  222. Fender Twin blowing fuses
  223. Fender Twin amp nasty buzz
  224. 16mm 10K Pot for line 6 source
  225. Marshall DSL 100 reissue - hum
  226. Isolation Transformer help
  227. 4x6L6 heater troubles
  228. G80rcd marshall
  229. 5F1 Distortion Like Blown Speaker
  230. Fender Hotrod Deluxe noice
  231. Acoustic 125 guitar combo issues.. no output!
  232. SS amp blues...
  233. Unknown orange PT wire
  234. Deluxe Reverb FAILED at gig!
  235. Peavey Classic30 troubleshooting help please
  236. Crate GFX 120 - Constant hum
  237. Ampeg GT10 Xsistor part number
  238. Help with hum in Vox AC15H1TV
  239. troubleshooting Ampeg B-15-N
  240. Trace Elliot lamp
  241. Hot Rod Deluxe...low volume, weird voltages
  242. Peavey Classic 50 2/12 question
  243. Bogner Alchemist
  244. Trace Elliot GP12
  245. Model T Reissue (Fender) w/ hole burnt in PCB... PT ok?
  246. Bassman 100
  247. SE 5F1-type bias ?
  248. Marshall JMP1 Preamp Clean Channel problem
  249. Fender Deluxe 900 static
  250. Vox AC4TV Buzz Problem