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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Just looking for some advice/opinons on whats up with my gear
  2. Marshll 1987 clone blowing fuse
  3. Showman AB763
  4. Marshall JCM2000 DSL
  5. Help with Ampeg V2
  6. 1988 Carvin X-100B 4-6L6's
  7. Fishman Lunchbox whoops Loudbox Hexfets
  8. mesa triple rect 3 channel switching issue
  9. Traynor trem problem
  10. Crate MX65R . . . vague problems . . .
  11. S.o.s M80 Fender Chorus Amp
  12. 5150 II help
  13. Marshall Mode 4
  14. Noisy Vibrolux
  15. mesa component wrong spec?
  16. Amazed and Disappointed
  17. Gibson Falcon
  18. Tube amp DVD - Any good?
  19. Popping Sound On Amp When Playing Guitar
  20. Marshall 1959SLP Low Bias readings. Help !
  21. Help, my newly build 5e3 is really quiet???
  22. When is it safe to work on?
  23. Power Supply probs - I'm a novice, HELP!!
  24. '65 Gibson GA25RVT - Bias supply issues?
  25. Harmony H305 Schematic needed
  26. Hum on bass channel of Blackfaced Bassman
  27. Warwick PRO FET IV schematics
  28. Manual for Bias Tool
  29. Clean-dirty on orange tiny terror
  30. B+ dropped from 427V to 339V !
  31. Flames in the power section - HELP!
  32. What the???
  33. Peavey Delta Blues hum. please help!
  34. Deluxe reverb, No Reverb!!!
  35. PI is suddenly red plating - HELP!!
  36. JCM900 50w dual reverb low on power
  37. Bizarre hum problem from tone stack
  38. Biasing Question
  39. HIWATT Bias Resistor Question
  40. Marshall Cabinet help??
  41. High-pitched piping whistle in C30
  42. Sunn 300T popping thermistor
  43. peavy classic 30 popping noise
  44. Old DI with Distortion
  45. Acoustasonic SFX II Problem...Schematic?
  46. Gibson Medalist 410 schem request
  47. Anybody have a dead Champ 25
  48. How to open a Crate BX100 combo?
  49. FX Loop problem with delay pedal
  50. Univox tube amp oscillates/feedbacks
  51. disassembly of a Hugges and Kettner duotone combo
  52. Mm 210-65
  53. Blues Deluxe Channel Problem
  54. ADA amp
  55. Did i damage my amp?
  56. Carvin XV-112E combo repair...
  57. Marshall VBA400 power amp voltages
  58. Cap replacement suggestions for SFDR?
  59. Strange Hot Rod Deville breakup
  60. Crate GX-15
  61. Marshall DSL50
  62. bandit 112 problem
  63. Tilting amp back onto its legs almost kills volume in fx loop
  64. Trem problem
  65. a bit off topic? Need schematic for Nikko 220 power amp
  66. Super reverb Vibrato--no worky
  67. Looking for Marshall VS100 schematic
  68. mosfet forward bias/ Hartke HA3500
  69. Power supply ground buzz....
  70. Noise in SFDR
  71. Ampeg J12t cuts out
  72. MusicMan 2275-65
  73. Blues Deluxe channel Limbo
  74. Fender Tonemaster
  75. Laney tube amp problem VC 30
  76. Question about replacement 100 watt Marshall PT
  77. Torres bias kit problems
  78. Peavey Ultra Plus - dead...
  79. Dead JCM800 . . need help . . .
  80. Hum in my fender blues de luxe
  81. HELP!! Marshall TSL100 Hum Clean channel only
  82. Marshall JTM60 preamp filaments
  83. Capacitor voltage rating
  84. spitfire problem
  85. Hum in power amp
  86. HELP with a Vintage Amp that's dead...
  87. 5150II Noises (and lack thereof)...
  88. Repair Safety First
  89. ODS troubles when cranked
  90. Extension speaker jacks (Alamo in particular)
  91. Marshall JMP-1 Midi preamp
  92. Marshall 50 watt JCM800 PT\Heyboer Woes
  93. Roland JC-120 fuse blowing
  94. 5 Volt Tap Question
  95. Fender Stage 112SE
  96. Vox AC 30 80ties problem
  97. Super Reverb RI trouble
  98. Problem with my Sunn 2000S
  99. Sovtek Mig50 low power
  100. Question about Bridge Rectifiers
  101. Safety for Tube Amp Nu-B
  102. Looking for schematic for Garnet PM1 mixer
  103. Vox AC125 HELP!
  104. Biasing trick for a Rivera R-55 ???
  105. Help - replacing plastic 4-prong jack
  106. tips on selecting replacement transistors when the original type is unknown
  107. Fender Super 60
  108. buying an oscilloscope
  109. Noise problems - Silverface Deluxe Reverb
  110. Wacky 5150 schematic
  111. mesa boogie dual rectifier odd feedback
  112. Need Valco "Chicago 51" schematic
  113. No sound at all: missing B+ ???
  114. Rivera f-55 - Octal sockets?
  115. Schematic for VOX AC-15 TBRX ?
  116. Loud Hum In Peavey Pacer Amp
  117. 6G9-B Tremolux (Brownface) voltage check - running too hot
  118. Ampeg Vl-1002
  119. roland cube 30 warbling
  120. popping when i turn transistor amp off
  121. 1965 Deluxe tube specs
  122. Grounded cap in Pro-Reverb, V5, pin 6
  123. Cap can question
  124. Sunn Sentura 2
  125. Strange Buzzing problem
  126. SS Ampeg B100 power transistors - What are they?
  127. Need Champ 25 Power Transformer
  128. Trace Elliot speed twin gone bang
  129. Locating Buzz in Distortion
  130. Marshall DSL100
  131. Marshall repair - how to replace speaker??
  132. Source for a 4PDT?
  133. Valve Jnr EL84 bias..
  134. 5150 Combo problem
  135. Info on this amp???
  136. sound city 50+ problem
  137. Update from Ashdown on 60H bias-FYI
  138. New Cap just died?
  139. Peavey Delta Blues
  140. ashdown peacemaker 60 bias adjust
  141. schematic for Ashdown Peacemaker 60
  142. Crate problem PART 2
  143. Need EBS TD650 scheme
  144. 18-watt - 60 and 120 hums
  145. Marshall Tube Amp Problem/Please Help
  146. Ampeg VL-1002/Please help..
  147. Crate vc5310 Valves ARRGGH lost volume
  148. '65 Super Reverb Tubes
  149. Need schematic for Crate FXT120
  150. roland kc-500 amp repair
  151. HUGE rookie mistake 18-watt heaters
  152. marshall slx power amp oscillating
  153. Valvestate problem - low volume
  154. Trouble With a Paraphase PI
  155. Peavey Delta Blues popping sound
  156. Johnson JM-150 amp PCBs
  157. How can you tell if a rectifier tube is bad?
  158. Vox AD30 noises
  159. Acoustic 300 schematic needed and ???
  160. JCM 800 No Power
  161. Deluxe Reverb tube problem
  162. Marshall valvestate 8100 blowing fuses
  163. Crate problem
  164. Sovtek Mig 100 Problems
  165. Bassman 135 Blowing Fuses
  166. Need schematic for H&K Attax 100
  167. Replacement PT for a JCM800
  168. Biasing
  169. Replacement OT for EKO?
  170. Current 6L6GC tubes...Tung Sol, JJ, other?
  171. SHOCKING Princeton
  172. Firefly amp
  173. 5150 standby doesn't work
  174. Rivera Fandango 212 combo problem
  175. replace one or all speakers?
  176. New 1967 Traynor YBA-3 - Noisy Crackling When Idling
  177. power transformer with no bias tap
  178. Fender Prosonic Amp gone "funny"
  179. 500 ohm grid stoppers for 6V6?
  180. reverb feedback
  181. Pro Jr. problem...
  182. swr workingman 15 catastophe !
  183. dead ampeg, need help troubleshooting
  184. Marshall blown PT cause
  185. No sound - volume knobs are ineffective
  186. Flutter with 12au7 tubes...
  187. Complicated homebrew help?
  188. Traynor YBA-1 Bassmaster Capcan replacement
  189. Mixing brands of output tubes
  190. Marshall DSL
  191. ampeg svt 4 pro-ground loop issue
  192. Fender performer 1000 Hey Enzo
  193. dead cap?
  194. Biasing question
  195. Q: Blackfacing a '69 SF Vibrolux Reverb?
  196. When did Electrolytic Capacitors get so darn expensive???
  197. subharmonics in Marshall 4210 (2205)
  198. Fender Princeton Recording Amp
  199. 6L6 Groove tube filiament solder issue
  200. Water damage Peavey Artist 240
  201. Sovtek MIG 60
  202. Newbie question - obtaining an oscilloscope
  203. Discharging filter caps in a Classic 30
  204. Problems with my 5150 combo
  205. Peavey Classic 30 tube glowing red
  206. space echo dying
  207. Hartke 3500-Output transistors
  208. deluxe reverb tube q
  209. Fender M80 help needed
  210. Hiwatt Lead 50 bias reistor
  211. Yet another parts source question
  212. Vox AD60VT Part search....
  213. unresponsive speaker
  214. Reverb in my Blues Jr doesn't work.
  215. Fender Acousticonic Jr.
  216. Loss of power (volume really weak)
  217. Holland amp schems?
  218. Sick Laney VC30 112
  219. beginners luck advice needed
  220. A quick quesiton about testing resistence
  221. HT fuse just won't stop blowing.
  222. Eico 950 B
  223. 5150 - Powered up with no speaker cable
  224. Mesa Studio Preamp - "dirty pot" sound
  225. vox tube change
  226. Roland jc-120
  227. How to use a tube tester
  228. Hartke HA2000 Part ID
  229. How do I get started in amp repair business
  230. Marshall JCM 800
  231. Hiwatt SG50 Lead
  232. PLEASE HELP!! Ampeg SVT R47 Preamp Resistor headache!!!
  233. Valve junior filter cap help
  234. Peavey 6505+ problem
  235. Filter cap voltage
  236. Randall RG80-112sc Channel Bleed
  237. Lee Jackson sp-1000
  238. safely run 8 ohm speaker off 4 ohm amp?
  239. One Tube Red Plates
  240. Can I use 6L6 tubes in my marshall 2555?
  241. I want to put 6550 tubes in my Marshall 2555
  242. Mesa single rect low volume
  243. Are Illinois caps better the Weber-branded caps?
  244. Twin Reverb build cuts out when Vol Cranked
  245. ? about TSL pot
  246. Peavey Delta power tranny Blues
  247. tube help on a Peavey Delta Blues 2x10
  248. bassman 135 feedback or parasitic
  249. One socket causing tubes to "run away"
  250. Hum with Reverb Channel?