Mystere ca11 User Manual Download Page 7

ca11  

Troubleshooting

Some tips:

•   No output. Power is on, but power LED is off and tubes do not light up.

  AC cable makes bad connection in IEC connector. Please check.

•   No output. Power is on, but power LED is off and tubes do not light up.

  Mains fuse is out. Replace fuse as per instructions on page 5.

•   No output. Power is on, but power LED is off and tubes do not light up.

  Mains fuse is not out. Thermal protection may have switched off power transformer. If so, the preamplifier 

will switch on again after internal temperature of power transformer returns to normal. Overheating might 

be caused by higher environment temperature than normal or heavy use.

•   No output. Power LED is on and tubes do light up normally.

  Check input selector setting, input and output wiring; if all seems to be OK check power amplifier.

•   Hum or noise coming from one channel.

  Noisy tube. First swap the 6SN7 tubes left to right. If noise follows tube swap, then you have found the 

problem tubeset. Now swap one by one from left to right. If noise follows, you have found the problematic 

tube.

•   Hum or noise coming from one channel or two channels.

  Check rectifier tube 5AR4: swap with new 5AR4 tube, if hum disappears then replace faulty 5AR4 tube.

•   Noise/distortion coming from both channels.

  Tubes may be in need of replacement. Read page 6 for tube basics and replacement options.

  Maintaining tube equipment can be easy if you have spare tubes. At least one tube of each type.

  If you try these possible solutions and problems persist, contact us or your local distributor for further 

investigation.

Mystère

Summary of Contents for ca11

Page 1: ...ca11 User manual Serialnumber Myst re FUSE UPDATE D I N F O R M ATI O N INSIDE...

Page 2: ...t so much more than simply splitting the integrateds into pre and power stages a technique common in the industry today Like all our separates its chassis provides space a tremendous advantage More sp...

Page 3: ...hope that the Myst re ca11 preamplifier will make you want to follow our next steps in expanding this new range of products If you have any questions or comments don t hesitate to contact us You can...

Page 4: ...if desired Check to see the power switch is off down Connect each source to the corresponding plugs Connect output of preamp with input of poweramp Your Myst re preamp inverts phase Connect positive t...

Page 5: ...airs of stereo inputs 1 set of preamp outputs terminal ca11 Front panel Rear panel Myst re Fuse Protection A note on fuses Fuses are safety valves They should always be replaced with the exact same va...

Page 6: ...a few minutes While it is not wise to leave tube power amplifiers on 24 hours a day you may leave this preamplifier on though it will result in more frequent tube replace ment Through experimentation...

Page 7: ...s do light up normally Check input selector setting input and output wiring if all seems to be OK check power amplifier Hum or noise coming from one channel Noisy tube First swap the 6SN7 tubes left t...

Page 8: ...panied by written description of the defect and a return authorization number available from Durob Audio BV or the authorized representative via e mail Upon receipt of the defective product Durob Audi...

Page 9: ...t all of the stones at Stonehenge were shaped with the inner surfaces of many stones being dressed to be either flat or concave and their outer surfaces irregular or convex The contrasting acoustic ex...

Page 10: ...Sales Support Myst re Durob Audio BV P O Box 109 5250 AC Vlijmen The Netherlands 31 73 511 2555 www mystere eu com info mystere eu com Email us for your local distributor...

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