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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Peavey Stereo Chorus 212 Schematic?
  2. ID this part ?
  3. Danelectro DM10 thumping
  4. Ampeg SVT 4 T schematic??
  5. HELP with wiring a Teisco Checkmate CM-10
  6. Old Fender fiber boards
  7. Old Fend. Transf. Primary Colour Codes
  8. Configurable Dummy Resistor Load Box for Amp design/repair
  9. Amp trouble
  10. Schematic Request Peavey Envoy 110
  11. Connecting a 110V amp to 240V - possible?
  12. B-15 Crackle
  13. faint signal at zero volume
  14. Hot Rod Deluxe - Mystery
  15. Help the newbie with an Encore 65, distorted
  16. Acoustic Control G100t
  17. 66 Vibro Champ needs some help
  18. Video of hum when I switch on the reverb of my Twin Amp
  19. New power transformer issues
  20. Crate BV120H bias?
  21. varistor touble
  22. Crate Palomino v16 Schematic?
  23. PV classic 30 PT?
  24. Sunn 300 T Bias / Balance issues
  25. Marshall JCM2000 has no sound
  26. JCM 800 2205
  27. Mesa Boogie Formula Pre - Relay
  28. Fender cab question
  29. B+ to high on homebrew
  30. Roland JC120
  31. peavey VB2 schematic
  32. Another peavey 400 bh problem
  33. Ampeg B2 Voltages
  34. Fender 'Twin Amp'
  35. Marshall MG 100HDFX-Clean switching?
  36. Line-in confusion
  37. 1968 Duo Medalist switch issue
  38. Vibro Champ Heater Wiring
  39. Amp troubles!
  40. Randall RG200
  41. Where's the best place to buy filters, caps, etc?
  42. Replaced V1 plate resistor, now I am getting squealing
  43. '79 JMP 50. Old tubes cause low bias voltage?
  44. Fender SK 100B pre amp section out
  45. marshall tsl60 switching problems
  46. Your thoughts on Filter Caps.
  47. Mesa Boogie .50 Caliber Amp - Low Output On Overdrive Channel
  48. MIG100 - Replacing output jacks
  49. Crackeling Peavey Classic 50/50
  50. TSL 602 'Squawking'
  51. Gibson GA42RVT repair issues
  52. Blue glow on the inside glass
  53. 62 Ac30 Distorting :(
  54. peavey delta blues ?
  55. Marshall AVT150H channel switch popping
  56. Rivera K-tre too loud and hissing
  57. yamaha G50-112II
  58. Peavey XR1200 Repairs In Progress - Help Requested
  59. Ampeg B-2 Fan Trouble
  60. '67 bandmaster - intinsity pot for tremolo doesn't start working till about 5
  61. crate gfx-212 - bad input?
  62. G1 amp in Case
  63. Rectifier path of travel
  64. Marshall Valvestate 8080 big noise when starting up
  65. Mesa Stiletto problem
  66. Marshall Mode Four
  67. Ampeg SVT 5Pro Schematic
  68. Radial Headbone
  69. Anybody got a gut shot of a Gibson Ranger GA20?
  70. Mesa Boogie 50 Caliber + red plating
  71. Ampeg SVT 4 Pro curcuit breaker
  72. Ampeg BT25
  73. classic 30 with low volume and odd sounding distortion
  74. PV XR400b mixer/amp with 200 H power module low output
  75. Sunn Beta Lead power transistor
  76. Problem with a Mesa Boogie Dual Recifier
  77. mesa boogie 3 channel triple rectifier switching channels by itself , other noise
  78. FRED Diodes For A Kustom 200B?
  79. SF 135Watt: Dropping the B+ voltage, and bias mod
  80. Silly Questions from a Twin Reverb owning DIY Newbie
  81. Need a little help with a Laney Gh100L
  82. Broken amp, need diagnosis help
  83. Roland Jazz Chorus 120 "Schematics needed asap"
  84. Fender Princeton 65 DSP - Low Volume and Hiss
  85. Dead Vibrato: Fender Twin Reverb Reissue
  86. Reverb issues w/ a Peavey Classic 30
  87. Post In Music Electronics - Link
  88. help with a Kustom 200B
  89. Valvestate 8080 issues
  90. ill amp 'crackles' into speaker ?
  91. Acoustic Model 123
  92. Motorboating issue
  93. Fender Acoustasonic II SFX problem
  94. Hartke 3500 relay problems?
  95. VOX AC30/6 TB scratchy static noise
  96. Help ID a Mains transformer for 135W Twin
  97. Signal tracing rules
  98. Fender Hot Rod Deluxe won't play!
  99. Hot Rod Dlx Fizzy artifact!
  100. need help fixing my fender fm 212r
  101. almost a 6G6 build
  102. Tech-Caps???
  103. Crate GLX65 Question; Working Amp w/ no Sound from Speaker
  104. Marshall DSL 2000?? SO confused!!
  105. re:Peavey XR600B
  106. Taking the next step in my builds and repairs.
  107. Swr la series chirps on power up
  108. Tonefullness of one cap over another
  109. Low V supply issue Firebass 700
  110. LANEY VH100r Power tranformer buzz fixed ...
  111. Polytone - blown power transistor
  112. wave -like sounds
  113. marshall avt 150 h
  114. Crate GX-15R doesn't work - Any ideas?
  115. rca soldering
  116. Deluxe Reverb Mod or mix-up?
  117. Fender Twin Hum Hum Hum
  118. Major goof, major problem OT
  119. Crate V50 ?
  120. Ampeg SVT5 Pro
  121. High-Frequence Noise at Roland Bolt-30
  122. What Reverb Tank for a Yamaha Fifty 112?
  123. Power Amplifier Repair
  124. Problem with Fender Princeton DSP
  125. Peavey VTM 60 Blows fuse
  126. clean channel gone on my little Fender Champ 30 - fixable?
  127. Ampeg SVT 5 Pro
  128. redplate/biasing issue
  129. Behringer GMX212
  130. Amp/Guitar Temperature Sensitivity
  131. fizz and oscillation in Peavey Rockmaster head
  132. Classic 50 tube biasing?
  133. i have damaged my Crate VFX,please help..
  134. 6G12-A Concert clone behaving oddly
  135. Roland Cube 60 -- missing reverb
  136. Peavey Heritage VTX Series
  137. Blues DeVille reissue squealling preamp
  138. Substitute GZ34 for 5U4GB?
  139. Princeton Reverb Re-work
  140. No sound from speaker..?
  141. AC at pin 8 on a 6V6
  142. Pot replacement....I got "shafted"
  143. Keeps blowing the fuse
  144. Blues deluxe..same ole' problem
  145. Color coded capacitor
  146. Miscellaneous Question About Amp Damage
  147. Weber 6a14hp buzz when reverb is on.
  148. line 6 flextoneII hd head problem
  149. Ultimate Chorus
  150. Guitar Research T64RS TUBE
  151. Roland Bolt 60 reverb tank?
  152. Fuse Pops - Transformer Dead
  153. Orange rockerverb owners?
  154. Lafayette (or Univox??) U-80A mystery amp
  155. identify a transformer
  156. Bassman 100 - Should it be louder?
  157. Super Champ XD
  158. Amp Tech Needed in So Cal...
  159. Fender Princeton Chorus problems
  160. Marshall MG100dfx
  161. Marshall Super lead 1959 Problem
  162. JTM45 Build Buzz Problem
  163. Svt 4 pro tubes??
  164. Question about Marshall Valvestate 8100
  165. Marshall JMP 50 watt bias
  166. Traynor yvm-1 voice master acting funny - - -
  167. Fender Concert II problem ( preamp)
  168. Sticker on power tubes? Harmful?
  169. Need pot volume control for op pro preamp Ovation Guitar
  170. Marshall AVT150 Blown Fuses
  171. Diodes for a Twin
  172. Hiwatt Classic 50 Crackling when cranked
  173. NOS 6L6 vs Currently made 6L6
  174. More failed Jamicon 12,000u 80v
  175. Fender Super Reverb AA763 Bias
  176. marshall 8080 pot problems
  177. Need help with Fender Twin Reverb
  178. Vibrolux low volume
  179. Slightly off topic, but strange
  180. High voltage on pin 1 of V5 in '67 Super Reverb
  181. Powering vtl5c1 from heaters on SLO 100 ?
  182. Fender Twin loud reverb hiss
  183. Awful noise from Fender Bantam Bass
  184. power noise parkg10r amplifier
  185. HomeBrew Troublshooting Help
  186. Silvertone 1484 help needed
  187. PEAVEY BRAVO 112 crunch channel bad switch?
  188. 78 Crate CR-1R, 72 Gibson G20, 2006 Randall RG 100 G3 100 watt valve dynamic
  189. Ampeg svt cl hum issues
  190. Polytone Mini Brute lll, lV, M-PA
  191. Need help trouble shooting peavey xl-500 mix amp
  192. Serious ?grounding? problem - kind of scary...
  193. Silvertone 1484 diode substitutes
  194. Trouble with Peavey Backstage 110 amp
  195. '67 Ampeg Jet, no trem & high voltage
  196. Buzz/click!-dead when switching off standby
  197. New Matamp schems
  198. Where to get replacement parts for a Fender Twin Reverb?
  199. Phase linear 700b help!
  200. Complete newbie to amp repair
  201. Peavey TNT Fuse blowing
  202. Park G10 amp at 4Ohm Speaker?
  203. Need schematic for a Crate VC6112
  204. Crate Blue Voodoo 120H acting up:
  205. Mesa DC-5, Massive Hum on Clean Channel
  206. My gibson amp
  207. Peavey Classic vtx series- Troubleshooting repair help needed!!!
  208. fender studio lead amp problem
  209. Dear god not the Selmer again... & PPIMV...
  210. Peavey VT Classic 212 Broken Phase Help
  211. Yamaha G50-112 owners manual wanted
  212. marshall atv100 have no distortion?
  213. Palomino V8 loud hum.
  214. 5e3 volume interaction
  215. SWR workingmans 15 Frying resistors
  216. 59 Bassman reissue cuts out after 10 minutes
  217. Crate Vintage 30
  218. peavey 5150 212 won't power on
  219. SVT 350 XLR out HUM
  220. 65 Twin Reverb Vibrato Problem. Please Help
  221. Ampeg SVT-6PRO death & resurrection
  222. Sunn Sceptre
  223. Blue Voodoo clean channel hiss without volume
  224. Peavey Ultra switching pops
  225. peavey400bh
  226. Princeton speaker rattling in the breeze
  227. solder type ????
  228. Randall RG200
  229. Fender Pro Tube Pro Reverb - Dead Tremolo and Noisy Reverb
  230. Fender Bassman
  231. Ampeg VL502 problem
  232. Power xfrmer wire color? Help!
  233. Could someone explain how this amp was working?
  234. fender stage 100 dsp 112 combo
  235. Peavey KB60 acting up
  236. overheating resistors
  237. please tell me its not a crate
  238. 5150iii channel two compressing
  239. Randall RG50TC problem
  240. how dangerous are floating ground amps (old Supro)
  241. volume loss Crate V32
  242. volume loss Crate V32
  243. Fender Stage 100 DSP
  244. Squire Champ 15/Fender Frontman 15(R)
  245. svt 4 pro going mute
  246. VHT Pitbull 50/12 Issues... Help!
  247. Peavey Studio 210
  248. B-52 AT100 very low volume/fuse blows when standby turned off
  249. Behringer GMX212 amplifier problem
  250. anyone have pic of cts alnico 10' speaker?