Pioneer DEH-P860XN Service Manual

DEH-P860MP/XN/UC561 2 3 41 2 3 4CDFABE6.2 CD ADJUSTMENT1) Cautions on adjustments• In this product the single voltage (3.3V) is used for theregulator. The reference voltage is the REFO1 (1.65V)instead of the GND.If you should mistakenly short the REFO1 with the GNDduring adjustment, accurate voltage will not be obtained,and the servo’s misoperation will apply excessive shockto the pickup. To avoid such problems:a. Do not mix up the REFO1 with the GND whenconnecting the (-) probe of measuring instruments.Especially on an oscilloscope, avoid connecting the (-)probe for CH1 to the GND.b. In many cases, measuring instruments have the samepotential as that for the (-) probe. Be sure to set themeasuring instruments to the floating state.c. If you have mistakenly connected the REFO1 to the GND,turn off the regulator or the power immediately.• Before mounting and removing filters or leads foradjustment, be sure to turn off the regulator.• For stable circuit operation, keep the mechanismoperating for about one minute or more after theregulator is turned on.• In the test mode, any software protections will notwork. Avoid applying any mechanical or electricalshock to the mechanism during adjustment.• The RFI and RFO signals with a wide frequency rangeare easy to oscillate. When observing the signals,insert a resistor of 1k ohms in series.• The load and eject operation is not guarantied with themechanism upside down. If the mechanism is blockeddue to mistaken eject operation, reset the product orturn off and on the ACC to restore it.2) Test modeThis mode is used to adjust the CD mechanism module.• To enter the test mode.While pressing the 4 and 6 keys at the same time, reset.• To exit from the test mode.Turn off the ACC and back up.Notes:a. During ejection, do not press any other keys than theEJECT key until the loaded disc is ejected.b. If you have pressed the (→) key or (←) key during focussearch, turn off the power immediately to protect theactuator from damage caused by the lens stuck.c. For the TR jump modes except 100TR, the track jumpoperation will continue even if the key is released.d. For the CRG move and 100TR jump modes, the trackingloop will be closed at the same time when the key isreleased.e. When the power is turned off and on, the jump modeis reset to the single TR (91), the RF amp gain is set to 0dB,and the auto-adjustment values are reset to the defaultsettings.