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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Old Carvin Pro Bass II 300 pops and crackles
  2. Acoustic B100H Schematic?
  3. AB763 Showman Replacement PT Info?
  4. Roland Jazz Chorus-120
  5. Vibrolux 6G11a low voltage. Replaced transformer. please help..
  6. Deluxe Reverb Distortion
  7. Vox AC30 RI head with AC on the B+
  8. Cross referencing-finding parts
  9. Marshall TSL lead channel not working
  10. Furman PL-8 Series II
  11. Hartke 3500 transformer supplier?
  12. Marshall 201 footswitch
  13. BDW83D and BDW84D TO-3P Equivalents ???
  14. speaker polarity
  15. hartke 3500 amp .. problem blowing speakers
  16. Anybody got a pic of the underside of a Fender Bandmaster Power Supply board?
  17. Blues Junior distortion
  18. Carvin Stereo Tube 100 (TS100)
  19. PEAVEY CLASSIC 30 HUM whilst playing
  20. 50 Caliber reverb wire
  21. High-pitch noise in modded Peavey Classic30 (oscillation?)
  22. Orange OR120
  23. fender ultra chorus volume problem
  24. Reverb/Noise issues on Silverface Princeton Reverb
  25. Help With A JCM2000 TSL 122!
  26. Mesa 50 Caliber reverb wire
  27. Marshall 8100 Valvestate Volume issue on Distortion channel
  28. Marshall G80R CD lights up no output
  29. Dsl 100 Preamp hum
  30. Another DSL Marshall problem..
  31. Low Bias Voltage on Crate TV-120
  32. SVT 4 Pro issues
  33. marshall 20/20 el84 problem :-(
  34. SVT-3 PRO fan problem
  35. Ampeg Smokey Burning and Blue Flashes!!!
  36. want to help me help kids? (amp repair)
  37. ampeg reverbrocket 2 voltage chart wanted
  38. What Voltage should my Bias be set at?
  39. Fender Blues Deluxe Reissue completely dead
  40. Peavey Microbass
  41. matched tube question
  42. Maximum voltage on oscilloscope
  43. Vibro-King EL84 Modification?
  44. Fender Princeton Chorus question
  45. ampeg reverbrocket question
  46. Multivox Tape Echo (just like Roland 201) has low output distorted echo
  47. deville 410 loud hum
  48. new guy here, blues deville problem!!
  49. mesa boogie ground switch
  50. Fender Deville 212 - Help!
  51. Bad solder joints????
  52. Acoustic 470 cuts out.
  53. Peavey Mark IV: dc on the speaker and preout jacks
  54. newer tube/SS amps - any techs not wanting to fix them?
  55. Crate cabinet inside wiring
  56. Ampeg B 100R -15dB problem
  57. Peavey KB60 driver transistors
  58. Big trouble with modded Peavey C30
  59. Peavey Vintage
  60. never changed a fuse b4fender princeton 112
  61. I screwed this One up!
  62. Kay model 606 tube amp help needed
  63. JMP - missing resistors
  64. Marshall DSP 201
  65. Peavey VK100 6v heaters
  66. NFB question
  67. Crate VC 5310 gone bad!!! Please help!!
  68. Crate Power Resistor Question
  69. TSL602 Low gain
  70. Marshall MB450H popping on shut down
  71. Harmonic Tube(s) with attenuator
  72. valvastate 8008 blowing secondary fuses
  73. Volume issue
  74. Dean Markley DMC 80 Power Transformer Secondary AC Voltage?
  75. '59 Bassman Clone Presence Control Problem
  76. super reverb intermittant fuse blowing
  77. Kay 730-c upgrade for guitar
  78. TSL100 bias again
  79. Randomly popping fuse
  80. Power Supply Cap's, Options ???
  81. 5E3 hums when connected w/ TTE
  82. ok to pull tubes?
  83. Peavey Bandit 112 transtube 2001 sheffield spkr
  84. 1980 Princeton Reverb Vibrato Always On? HELP!
  85. Friends in the news
  86. Heater voltage too low on Fender Showman
  87. master reverb 30 starting to choke
  88. Mesa F-50 noise on clean channel
  89. Marshall JCM 2000 repair issues
  90. Fender lamps
  91. Deluxe reverb reissue doesn't like loud
  92. Vox AC30TB gain problem
  93. Chassis Clips
  94. Peavey 5150 combo amp fuse?
  95. Marshall JCM: Loud hum goes away when I touch the chassis
  96. Ampeg SVT-6 Pro Random Noises
  97. Behringer BXL 1800A
  98. General capacitor value (swapping) and function question
  99. Gibson G-10 (solid state) Output Stage Problem
  100. Help: Fender Pro Junior Undertones?
  101. Marshall dsl 201 combo
  102. Fender 75 Tube order?
  103. ampeg SVT noise issue
  104. standby switch
  105. Holden Slave mods
  106. Peavey VYPYR 15
  107. Fender Hot Rod Deville: clean channel switching problem
  108. How to get started with an oscilloscope?
  109. Marshall TSL 100 Issue
  110. Ampeg v4 trouble that needs to be shot
  111. crate bl120 crashes
  112. No sound from Vintage Deluxe Reverb
  113. Is a 6G6-A Bassman quiet for it's power?
  114. JCM2000 DSL pcb pots?
  115. crate v33h channel switching pop noise
  116. Ashdown mag 300 combo amp, quit on me.
  117. Ampeg B15S humming
  118. valve brands for fender amps?
  119. power loss in '66 blackface princeton n/r
  120. Tube burning station
  121. Fender Pro 185 Footswitch / Reverb Problem
  122. Cracking noise Classic 30/advice on replacement
  123. Help in removing master volume from silverface Twin
  124. Is ther an easy way to diagnose screen grid resistors?
  125. Op Amp tester
  126. SWR schem?
  127. Roland JC-60 input jack mystery - HELP!?
  128. Fuchs Amp Sizzles, Ground Noise
  129. JCM 2000 Reverb
  130. Marshall AVT150 problems
  131. '65 Twin Reverb R-Issue B+ noise problem
  132. Mesa Mark iii
  133. GK knobs WTF??
  134. ADA MicroTube 200 smoking issues
  135. Music man circuit breaker
  136. Dart amp
  137. Redplating on one tube
  138. Koch Twintone
  139. High-Pitched Squealing at High Volumes
  140. Ampeg SVP-1500 Protecting
  141. Super Reverb (no reverb)
  142. Ampeg B12XT Motorboating on Intensity
  143. Blown part in Fender Blues Deluxe Reissue
  144. 1980 twin reverb trouble shoot
  145. This may be a stupid question, but..
  146. need some help please!
  147. Peavey C30: moan from the speaker
  148. Fender PS 160 Vocal Amp Trany problems???
  149. New to forum.. please help
  150. soldering iron question.
  151. switch-on transient in solid-state amp
  152. JCM 800 poweramp not fully functioning
  153. Any large retailers still sell fuses???
  154. 1975 Twin Reverb - Which tubes?
  155. Vox Valvetronix - How the F*** do I get this thing apart?
  156. Peavey Deuce: Power Supply Board Component
  157. Crown CE2000....anyone actually repairing this junk?
  158. Acoustic 370 Repair - Atlanta, GA area
  159. Silvertone 1485 dual OT?
  160. watkins tremelo amp (1960)
  161. Fender FM65 DSP lockup
  162. Heater voltages too high?
  163. Ampeg SVT Classic goes into standby on its own
  164. magnatone 213 finished - vibrato doesn't work
  165. Sudden loud buzzing on Ashdown bass amp
  166. Marshall 8100 head hums!
  167. Old Symphonic 16-S Record Player Problems
  168. Bandmaster Reverb vibrato
  169. bandmaster reverb won't adjust
  170. Princeton 65: what to make of TP values
  171. Peavey C30 squeals
  172. M-80 popping buzzing
  173. Is This a Bias Trim Pot?
  174. Another AVT150 TDA7293 problem - please help
  175. Biasing Question: Marshall JCM602
  176. Fender Champion 600 On/off toggle switch
  177. Good book on solid-state troubleshooting and repair
  178. Bad Cat Panther with creeping bias
  179. No chorus effect on JC-120
  180. Engl Powerball
  181. Looking for a Ampeg VH-140C schematics
  182. Dynacord Eminent II
  183. Behringer PMX2000 Fried!
  184. Peavey 5150II Tube Question
  185. Holden Wasp 4xKT88 power tube arcing.
  186. Mark VIII Bass Head
  187. filter cap failure - gradual or sudden?
  188. pcb input jack replacement
  189. Peavey Classic 20 transformer source
  190. High-pitch noise in old tube amp (oscillation?)
  191. JTM Blowing Main Fuse?
  192. Marshall MG100HDFX head broken input jack
  193. Disharmonic distortions
  194. Matching speaker Ohms and amp Ohms
  195. Vox AC15 RE keeps blowing fuses
  196. Fender princeton 112 plus blowing fuses??
  197. Lucky find- what's your best find?
  198. '66 Ampeg Reverbrocket Transformers
  199. Loud hum
  200. Vibro Champ filters self-discharging - why?
  201. Beheinger hum?
  202. Peavey m 2600 old style one channel out
  203. older Roland Cube 60 .....low hummmmmm
  204. Fender HRD channel switching
  205. MusicMan 130, questions.
  206. Mesa V-Twin problem
  207. ic confusion
  208. Help Biasing my Vox ac50 cph
  209. Marshall AVT150H Sound?
  210. My vox ac50 classic plus head wont go off standby.
  211. Help!! I connected a burned my Fender DeVille
  212. Transformers
  213. Heathkit IO-103 oscilloscope
  214. Current rating for heater wiring in power transformer
  215. Cyber Champ preamp dead
  216. B52 AT-100 Reverb Problem
  217. Shorted Power Transformer Primary - Help!
  218. guitar research help
  219. Help with Crate Vintage Club 50
  220. help with Vox amp
  221. Ampeg B4 R slow power up anyone see this before?
  222. Locating Noise
  223. Questions about Bassman70
  224. Transformers for (silverface) Bassman 70
  225. How do I eliminate 120 cycle hum/noise from my solid-state amplifier?
  226. Fuse blow out on Valveking 112 and Amp Won't turn on again
  227. Peavey TNT-no output, and I think it's my fault
  228. Marshall DSL 100 Low Gain Problem HELP!!!
  229. Mesa Boogie Nomad 45 - Reverb INOP
  230. Musicman 2275-130 - tremolo issues
  231. filament supply question
  232. another squealing champ
  233. Orange AD30- Channel Switch Problem
  234. behringer in speaker crossover limiter bulb
  235. JMP -1 12AX7 tube voltages.
  236. ReCap kit from Fliptops.net for my V4
  237. Crate GX1200 devices?
  238. Ampeg VL-503 Blowing Fuses
  239. Help on my jcm 800 mods
  240. Alto power amps
  241. DC Pre-Amp Tube Filaments on vintage Fender - pros and cons?
  242. SWR Baby Blue 2
  243. Question for Enzo on Fender Frontman 25R
  244. Peavey duel 212 and rectoverb problem
  245. Kustom pcb
  246. Fender Supersonic Output Tube Substitution
  247. Peavey Firebass 700
  248. Help with Harmony 303a
  249. amp buzz
  250. Peavey XXX needs a love tap 2 work