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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Roland Cube 60 Keyboard
  2. Crate FXt65 cuts out on clean channel only
  3. Randall RG75 G3 Combo amp
  4. 1972 Fender Bandmaster Reverb
  5. Frankenstein'd Pro Junior build
  6. Premier 88 tremolo not working
  7. Randall RX120R Solid State Treble Fault
  8. Univox U-1011 question
  9. Fender White Noise
  10. Peavey JSX issues...
  11. Ampeg V2 bias question
  12. Output transformer fault or OK?
  13. Source for Peavey 7 pin DIN jack?
  14. Peavey Bandit 112 - MSC 2B DZ89052 diode alternative/replacement
  15. Marshall Mosfet 100- HISS
  16. Noisy mains transformer
  17. DSL bias problem
  18. Hot Rod 3 Bright Switch squeels
  19. Hooked up PT wrong on a 6v6 2204 build
  20. Randall RGT100ES Burned Resistor
  21. Super Six Back Panel
  22. Sovtek Mig100U - Help!
  23. Ampeg V2 - a few quick questions
  24. Fender Showman Plate Dissipation is 0mv
  25. Ampeg SVT-CL zero Ig2 in one tube causes funny readings all over
  26. Bottom Line: Tube Dissipation and its effects on tone
  27. Mesa Boogie Studio 22 Low Output (Unless FX Loop Patch)
  28. Peavey XR8600D output phase issue...
  29. OP AMP question
  30. Marshall JTM 60 problem with gain channel with FX loop
  31. Bugera 333xl (non-Infinium) popping fuses
  32. Markbass Combo head II issue
  33. Smoke coming from amp
  34. Markbass combo head II problem
  35. Ceramic capacitors and working voltage
  36. Peavey 400B module troubleshooting
  37. Roland cube 20 weird constant scratchy wind noise
  38. Best way to check filtering quality of Power/Line Conditioner
  39. Hissy GK 250 ML
  40. Peavey PV10 Mixer Ribbon Cable To Effects Board
  41. Fender Hod Rod Deluxe
  42. In my Vox AC15H1TV resistors R32, R24, R33, R21 different from the schematic !?!
  43. Acoustic Control 150B DC offset issue
  44. fried Peavey 5150 Combo
  45. Roland KC 550 fuses?
  46. Fender BF Bassman AB165 output waveform issue...
  47. Egnater Tourmaster 4100
  48. Silvertone 1484 with blown capacitor
  49. This one really has me scratching my head...
  50. Fender Hot Rod Deville distorting
  51. Installing Tube Dampers correctly
  52. My VS100 has a heartbeat??
  53. 74 Fender Bronco Failing Power Tube Cathode Caps
  54. Epiphone socal 50 Reverb tank
  55. Peavey M-7000 Mark Power Amp - Slow Power Up
  56. Mesa Boogie Prodigy
  57. removing tube hold down (spring type)
  58. Old tube testers - worth getting?
  59. Marshall VS100 Op Amp issue?
  60. Ampeg SVT CL preventative maintenance question - to fil transformer fuse? or not to?
  61. fender deville query.
  62. Dual cone voice coils
  63. the "speaker grill" section of Fender amp heads
  64. Ampeg SVT CL export model fan problem
  65. Marshall VS265 one side dead
  66. Noob 10x scope probe question
  67. Smoking resistor!
  68. Crate KX-160 KX160 Noise Help
  69. "Thuddy" background noise during pick attack
  70. DRRI reverb stump
  71. Bandmaster blackface low power
  72. The Little amp with the tone I love most wants to *ELECTROCUTE* me!
  73. Issue with Laney GH100L
  74. Chalky white residue on tube shields
  75. Fender prosonic
  76. Fender reverb in combo amp
  77. ampeg micro cl head schematic reqd
  78. Fender Super Champ footswitch...LEDs not lighting
  79. gear damaged during fire.....
  80. SVT 7 Pro Help.
  81. 1994 Fender Twin Amp
  82. custom built 200watt bass amp transformer
  83. Soldano Avenger 100 FX Loop Install
  84. Need Help Diagnosing a Marshall Valvestate 8200
  85. Board Mounted Pots in Preamp ??
  86. vintage Univox U65rn fix? light turns on, but no sound...
  87. Urei 1178 compressor setup issue
  88. Determining Speaker Impedance on customized Carvin 4x12 Cabine
  89. Oh yes...ANOTHER Tsl Marshall!
  90. Mosfet replacement advice
  91. Epiphone EA-600RVT Solid State amp weak output vol
  92. Schematic needed for Vibrolux Reverb w/ 4 6L6's ? Or was this a custom job?
  93. Mackie HR824 trouble -- white noise from tweeter
  94. Another AVT-150/TDA 7293 Thread
  95. Laney LC15R - strange noise
  96. Bassman AB165, bass control is hardly working
  97. Marshall 5005 Sound Problems
  98. SVT 5 Pro 06A565 Preamp Schematic
  99. 2SK364 / 2SK170 Replacement
  100. Marshall VS65
  101. Orange AD200 Bass MK III not working
  102. Audio Technica ATW-14
  103. Fender Hot Rod Deluxe
  104. Yorkville NX55P and 750P
  105. JC120 Loud Buzz
  106. Roland D-Bass 210
  107. Acoustic 165 has low output
  108. Is 5.6V DC Too Low for 12AX7 Heaters? Peavey Classic 50
  109. 59 Champ popping fuse
  110. Egnater Tweeker 40 NO OUTPUT
  111. POP when pluging into normal channel
  112. Carvin BX250 micro bass capacitor voltage rating question
  113. Potentiometers for Fender Stage Lead II 212?
  114. PV Classic 50 ate my JJs EL84s need -18v to sound good ??
  115. Bugera 6262 Infinium head problem (no amplified sound)
  116. Roland JC120 Too Bright
  117. Negative Feedback Loop
  118. Bose L1, PS1 help needed have official Bose Repair Manual
  119. fender champion 100 spare parts
  120. Sunn Power Switch
  121. Speaker impedence switching/wiring
  122. Checking tubes
  123. Echoplex won't erase.
  124. Silvertone 1484 install 3 prong power cord
  125. Troubleshooting Amp
  126. Marshall AVT
  127. PV Classic 30 Pre Heaters Dead
  128. Marshall TSL
  129. Fender Supersonic 60 reverb whistle
  130. Hughes & kettner Grandmeister 36 needed ! anyone can help?
  131. Fender Silverface Deluxe Reverb Hum
  132. Crate MX65R repair - Parts Q
  133. Hartke HA7000
  134. Weird problem or crappy PT?
  135. Sit or Stand... How tall is your workbench?
  136. SVT -5 Pro
  137. Help fixing a very vintage Peavey
  138. Peavey VK 112 Weak Lead Channel
  139. Ampeg Micro CL distortion
  140. Mellotron power cord
  141. 1965 Hohner Orgaphon 50 MH (4xPL84)
  142. finally, and you got tobe kidding!
  143. Vintage Chassis Cleaning -- What to use?
  144. Wooden Eyelet board on "boutique" amp??!
  145. Roland JC77 Dead Short Only When Both Speakers are Connected
  146. ESD damage suspected...but strange
  147. Crate VC 6210 power supply problem
  148. 100/50 watt switch curcuit
  149. fizzy distortion at nearly any level-- AB763
  150. Tremelo schematic - correct?
  151. VOXAC15c1 loose treble knob help!
  152. Peavey Heritage vtx 2x12 question
  153. Removing glued on capacitors from circuit board?
  154. Realistic Carnival 6V6GT Tube Amp Help
  155. Crate Blue Voodoo Blown 1/4A fuses
  156. Speaker pulsating with or without any input signal. What causes that?
  157. Where to get Engl pots?
  158. Crate GX-80 reverb repair question, wrong new tank...too much reverb
  159. Sprague electrolytic caps
  160. Fender Bassman 135 blowing fusss
  161. Ultra Chorus Gain Channel Remove
  162. JC120 Chorus Issue
  163. Blues jr PT HV dead
  164. 5150--crazy problem
  165. Another Hot Rod Deluxe Issue
  166. Hartke 3500
  167. Orange Drops going kaput in 80-90's Mesa/Boogies
  168. Fender Super '94 Pro series channel switching issues
  169. AMPEG VT-22 phase inverter imbalance
  170. VHT Special 6 out of volume
  171. Crosstalk between gain stages of Mesa Road King II guitar amplifier
  172. Fender optocoupler
  173. Blackfacing a 74' Bassman 10
  174. Best way to wire an idle preamp tube half?
  175. Earth Amp BT-2000 Bass Traveler Bridge Rectifier Issues
  176. Can't solder headphone speaker wire correctly
  177. Problems - 30watt JTM45 kit
  178. Deluxe Reverb Build - noisy vibrato and slow response to vibrato pedal
  179. PV Delta Blues intermittent "howling"
  180. Recommendation for Class D Amp book
  181. Peavey Delta Blues w high freq osc.
  182. Sunn Beta Lead has 40 v DC on speaker out jack
  183. BadCat - Classic Cat - Hot! Hot! Hot!
  184. 1976 Fender Vibrolux Hum after minor repair.
  185. Valvestate 8240 troubleshooting
  186. fender stage 100 head loud input hum
  187. 6L6GC in Kt88/6550 place?
  188. Gk mb150s not powering on
  189. Kalamazoo Model 1...how to make it brighter?
  190. Trying not to walk away from Mark Bass Little Mark Tube 800 repair
  191. Peavey Valveking V112 Lead Channel Out
  192. 1973 Twin Reverb...Reverb Circiut. Running Out Of Ideas
  193. Fender Ultralinear SR 6v6 mod
  194. Crate gtx65
  195. Crate G-20: "input" produces no sound, but plugging guitar into footswitch does
  196. Fixing a Fender Champion 30 Amp
  197. Ampeg Jet fizz J-12D
  198. Bugera 6262 crackling/power amp board issue...
  199. Hartke HA 3500 Transient attack
  200. Marshall MA50C input jack
  201. Bugura 333XL Combo Issues.
  202. Anyone else walking away from repairs?
  203. Peavey Bandit 112 really loud feedback for no reason
  204. Fender performer 1000
  205. New 15" bass speakers CA154 vs BL15-300x
  206. AC Voltage on the B+ rail
  207. Traynor YCV40 Low Output
  208. Peavey 5150 II Plate voltage too high?!
  209. B-52 ATX100 Low Power Output
  210. Peavey Bass Version B
  211. Fender Stage 185 Losing Sound, Until I punch It On the Noggin
  212. 68 Fender Bandmaster Reverb help needed
  213. 1968 Fender Bassman- Serious Volume Loss
  214. JBL EON 515-XT repair
  215. Crate Blue Voodoo 6212 HELP NEEDED!!!
  216. nfb issue
  217. Need a channel switching PC mount switch for a Crate GX80.
  218. Squeal/Siren noise Silvertone 1481
  219. repair TKO 115 Bass Amp
  220. Fender 212r repair: distorted sound output and bump on power on
  221. Blackstar HT Studio 20 power transformer
  222. Princeton Reverb - hum but no reverb
  223. .22 cap on Impedance Selector Marshall/Splawn??
  224. Ampeg SVT CL reliability/tech recommendation
  225. Laney RB9 +HT rail dropping. Last ditch attempt!
  226. Peavey Bandit 65 Speaker replacement recommendation
  227. Vox Buckingham Tremolo Problem
  228. Fender Hot Rod Deluxe - persisting issue after replacing components
  229. Redmere Soloist Footswitch Mystery
  230. Symptoms of a bad cathode bias resistor '68 bassman
  231. Mesa/Boogie Maverick repair nightmare
  232. Fender DRRI FS wiring
  233. Jet City 20 combo Troubleshooting
  234. Mark Bass cmd151P schematic?
  235. Musicman 2275-130 - tremolo issues revisited
  236. Amp popping noise when switching pickups
  237. Marshall JMP 50 watt model 1987 confirmation please
  238. Gallien Krueger 1001RB ... R61???
  239. Marshall tube codes
  240. Fender Super 60....Reverb circuit feeds back with volume at zero.
  241. Traynor YCV40 Issues
  242. jcm900 4101 4x5881 pc0112 1kohm screen resistor.... doh!!
  243. Help clean up RI fender Super Reverb
  244. Newbie Question: Death Cap in Vintage Fender 3 prong corded amp
  245. Silverface Twin Reverb: Reverb pot adding distortion
  246. Fender Princeton 650 Troubleshooting help
  247. tbrsl1
  248. Fender Performer 1000 distortion channel
  249. Peavey KB-1 DC on Output
  250. 1968 Fender Bassman refreshing some components.