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Found website easy to use and manual very clear. First class service
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The quality is quite good and clear. Nothing of the informations inside is lost during the digitalizing process
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Very good service, fast downloads and good manuals.
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Good qulity. Even as it is an old manual (from 1991-1992) it has a good scanned quality and is complete, including user's manual, disassembly intructions, diagrams and schematics, ajustments, troubleshooting and parts list, as usual with SONY manuals and Owner-manuals service.
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tres bon document
cela a permis de verifier la connection de l'ecran
merci
salutations
KD-S621
Maintenance of laser pickup
(1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens with a alcohol soaked cotton swab. (2) Life of the laser diode When the life of the laser diode has expired, the following symptoms will appear. (1) The level of RF output (EFM output:ampli tude of eye pattern) will be low.
Is RF output 1.0 0.35Vp-p?
NO Replace it.
YES O.K
Replacement of laser pickup
Turn off the power switch and,disconnect the power cord from the ac outlet. (3) Semi-fixed resistor on the APC PC board The semi-fixed resistor on the APC printed circuit board which is attached to the pickup is used to adjust the laser power.Since this adjustment should be performed to match the characteristics of the whole optical block, do not touch the semi-fixed resistor. If the laser power is lower than the specified value,the laser diode is almost worn out, and the laser pickup should be replaced. If the semi-fixed resistor is adjusted while the pickup is functioning normally,the laser pickup may be damaged due to excessive current.
Replace the pickup with a normal one.(Refer to "Pickup Removal" on the previous page)
Plug the power cord in,and turn the power on. At this time,check that the laser emits for about 3seconds and the objective lens moves up and down. Note: Do not observe the laser beam directly.
Play a disc.
Check the eye-pattern at TP1.
Finish.
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 $4.99 KD-S621 JVC
Owner's Manual Complete owner's manual in digital format. The manual will be available for download as PDF file aft…
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