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Good quality service manual.The scheme is on A3 format and very readable.Thank you
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Very good service-manual with clear electrical diagrams. Thanks you.
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the manual is in quite good quality and it's in pdf. manual was send in less then 6h.
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Absolutely top, I've got now all Service-Manuals I'll need to repair my Mackie-Mixer!
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The service manuel is very helpful, we where able to restore the device to its working operation again.
UX-P4R
Maintenance of laser pickup
(1) Cleaning the pick up lens Befor you replace the pick up, please try to clean the lens with a alcohol soaked cotton swab. (2) Life of the laser diode (Fig.1) When the life of the laser diode has expired, the following symptoms wil appear. (1) The level of RF output (EFM output:ampli tude of eye pattern) will below.
Replacement of laser pickup
Turn off the power switch and,disconnect the power cord from the ac outlet.
Replace the pickup with a normal one.(Refer to "Pickup Removal" on the previous page)
Is RF output 1.1 0.15Vp-p?
NO
Replace it.
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.
YES O.K (Fig.1) Check the eye-pattern at TP1. Play a disc.
(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.
Finish.
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