- ページ 33

カーレシーバー Pioneer CDX-M2096ZRNのPDF サービスマニュアルをオンラインで閲覧またはダウンロードできます。Pioneer CDX-M2096ZRN 47 ページ。 Multi-compact disc player

ページを印刷する

1. Operations and Specifications

6. ADJUSTMENT

6.1 CD ADJUSTMENT

1)Precautions

• This unit uses a single power supply (+5V) for the

regulator. The signal reference potential, therefore, is

connected to REFO(approx. 2.5V) instead of GND.

If REFO and GND are connected to each other by

mistake during adjustments,not only will it be

impossible to measure the potential correctly,but the

servo will malfunction and a severe shock will be

applied to the pick-up. To avoid this,take special note

of the following.

Do not connect the negative probe of the measuring

equipment to REFO and GND together. It is especially

important not to connect the channel 1 negative

probe of the oscilloscope to REFO with the channel 2

negative probe connected to GND.

Since the frame of the measuring instrument is

usually at the same potential as the negative

probe,change the frame of the measuring instrument

to floating status.

If by accident REFO comes in contact with

GND,immediately switch the regulator or power OFF.

• Always make sure the regulator is OFF when

connecting and disconnecting the various filters and

wiring required for measurements.

• Before proceeding to further adjustments and

measurements after switching regulator ON,let the

player run for about one minute to allow the circuits

to stabilize.

• Since the protective systems in the unit's software are

rendered inoperative in test mode,be very careful to

avoid mechanical and /or electrical shocks to the

system when making adjustment.

• This unit is adjusted in a combination with the CD

control unit (KEH-M9100ZRN/EW). Each regulator key

should be operated at the unit.

With the KEH-M9100ZRN/EW taken up for reference,

a description 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-

M9100ZRN/EW keys.

• How to enter into the test mode

Switch ACC,back-up ON while pressing the AF and 6

keys together.

• Resetting the test mode

Switch ACC,back-up Off.

• Disc detection during loading and eject operations is

performed by means of a photo transistor in this

unit.Consequently,if the inside of the unit is exposed

to a strong light source when the outer casing is

removed for repairs or adjustment,the following

malfunctions may occur.

*During PLAY, even if the eject button is pressed,the

disc will not be ejected and the unit will remain in

the PLAY mode.

*The unit will not load a disc.

When the unit malfunctions this way,either re-

position the light source,move the unit or cover the

photo transistor.

• When loading and unloading discs during adjustment

procedures,always wait for the disc to be properly

clamped or ejected before pressing another key.

Otherwise, there is a risk of the actuator being

destroyed.

• Turn power off when pressing the button FWD or the

button REV key for focus search in the test mode. (Or

else lens may stick and the actuator may be

damaged.)

• SINGLE/4TRK/10TRK/32TRK will continue to operate

even after the key is released.Tracking is closed the

moment C-MOVE is released.

• JUMP MODE resets to SINGLE as soon as power is

switched off.

CDX-M2096ZRN