CDS-P5000
7.2.2 TEST MODE
1)Precautions
Y This unit uses a single power supply (+5V) for theY Disc detection during loading and eject operations is
regulator. The signal reference potential, therefore, isperformed by means of a photo transistor in this
connected to REFO(approx. 2.5V) instead of GND.unit.Consequently,if the inside of the unit is exposed
If REFO and GND are connected to each other by mis-to a strong light source when the outer casing is
take during adjustments,not only will it be impossibleremoved for repairs or adjustment,the following mal-
to measure the potential correctly,but the servo willfunctions may occur.
malfunction and a severe shock will be applied to the*During PLAY, even if the eject button is pressed,the
pick-up. To avoid this,take special note of the follow-disc will not be ejected and the unit will remain in
ing.the PLAY mode.
Do not connect the negative probe of the measuring*The unit will not load a disc.
equipment to REFO and GND together. It is especiallyWhen the unit malfunctions this way,either re-posi-
important not to connect the channel 1 negativetion the light source,move the unit or cover the
probe of the oscilloscope to REFO with the channel 2photo transistor.
negative probe connected to GND.
Since the frame of the measuring instrument is usual-Y When loading and unloading discs during adjustment
ly at the same potential as the negative probe,changeprocedures,always wait for the disc to be properly
the frame of the measuring instrument to floating sta-clamped or ejected before pressing another key.
tus.Otherwise, there is a risk of the actuator being
If by accident REFO comes in contact withdestroyed.
GND,immediately switch the regulator or power OFF.
Y Turn power off when pressing the button FF or the
Y Always make sure the regulator is OFF when connect-button REV key for focus search in the test mode. (Or
ing and disconnecting the various filters and wiringelse lens may stick and the actuator may be dam-
required for measurements.aged.)
Y Before proceeding to further adjustments and mea-Y SINGLE/4TRK/10TRK/32TRK will continue to operate
surements after switching regulator ON,let the playereven after the key is released.Tracking is closed the
run for about one minute to allow the circuits to sta-moment C-MOVE is released.
bilize.
Y JUMP MODE resets to SINGLE as soon as power is
Y Since the protective systems in the unitOs software areswitched off.
rendered inoperative in test mode,be very careful to
avoid mechanical and /or electrical shocks to the sys-
tem when making adjustment.
Y This unit is adjusted in a combination with the CD
control unit (KEH-P7000, etc.). Each regulator key
should be operated at the unit.
With the KEH-P7000 taken up for reference, a descrip-
tion will be given below concerning how to enter into
the test mode, including key operations. The key in
the adjustment text is also one of the KEH-P7000
keys.
Y How to enter into the test mode
Switch ACC,back-up ON while pressing the 4 and 6
keys together.
Y Resetting the test mode
Switch ACC,back-up Off.
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ACEC
