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Very good service Within one day i received a pdf of the users manual and electric circuits so I was able to measure the different voltages in the printed circuit and find out the fault Payment was also reliable and easy.Without the manual i could not have repaired.So thanks to "Search for a manual"
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you are doing great job guys.....my father ask me to find out the schematics of Sony KV25R1D to sort out the problem ..(he was electrical technician, and excperianced with TV and simillar stuff). finally he found the cause and change all necessary parts....now he has got working old dog..and is very happy!!... thank you all.. NB..he also saved the repair cost.
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Perfect. Received my manual within 24 hours. Clear scan of the manual I needed. No problem.
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Item as described, very well detailed manual with complete schematics. I've received the download information shortly after payment, very good support.
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Really good and well scanned. File is complete the full service manual for 5$
Madrigal Audio Laboratories P.O. Box 781 Middletown, CT 06457-0781 (860) 346-0896 FAX (860) 347-6251
TECHNICAL SERVICES
INFORMATION SHEET
5.1 / 7.1 AMPLIFIER OSCILLATION
Page 1 of 1
MARCH 17, 1999
OVERVIEW
There have been reports of 7.1 and 5.1 amplifiers shutting down when connected with 4-conductor speaker cable. The configuration of cable is frequently used to drive the 5.3 and 7.3 dual feed surround speakers. Citation amplifiers are ultra-wide bandwidth circuit designs. When this design is connected to long lengths of 4-conductor speaker wire, the output of one channel may leak into the ground of the ground of the adjacent channel through the cable, causing an amplifier to oscillate and go into protection. This is caused by the proximity of multiple conductors within a single wire sleeve.
PARTS
A 22uf capacitor needs to be installed between the negative terminals of the amplifier. The diagram below shows the location.
INSTALLING
Below is a diagram that shows how to connect the 22uf capacitor. If you should have further questions regarding the hook-up of these devices, please contact the customer support department at (860) 346-0896.
22uf capacitor connects between the negative of each pair of channels.
Speaker wire connection should be hooked up as usual.
51-71 AMP Oscillation-CIT31799.doc DOC# CIT31799
Page 1 WB-TS / FB-DW
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