Pioneer CDX-M12 Service Manual page 22

cpDx<-Mil2
13 TE Offset Adjustment-2
« Purpose:
To adjust the electrical offset of the tracking servo to
zero.
«Maladjustment symptoms: ~
Search times too long, carriage run-away.
«Measuring equipment / jigs:
DC voltmeter or oscilloscope,
volume adjustment driver
* Measuring point:
TEY
¢ Test dise and setting:
No Disc Test mode
¢ Adjustment position:
VR353
Adjustment Procedure
24
14 Checking FEY Level
* Purpose:
Check the focus error level.
«If the level is insufficient:
Focus is hard to close and the playability is worsened.
* Measuring equipment / jigs:
Oscilloscope
« Measuring point:
FEY
¢ Test disc and setting:
SONY TYPE 4 (or ABEX TCD-782) Test mode
REFOUT
Checkout Procedure(This checkout always must be
performed after gain adjustment.)
. Connect the oscilloscope to REFOUT and FEY. Connect
FEX to REFOUT.
. Inthe test mode, set a test disc-loaded magazine and
select a tray with a test disc.
. Switch regulator ON.
. Using the se or Kd key, move the pick-up to the
center of the test disc.
. Press the F«2 key to close focus. During this action, the
disc repeats acceleration and deceleration.
. Observe the FEY waveform and measure the FEY
level.
. Switch regulator OFF.
. Disconnect FEX and REFOUT.
Normal level of FEY:2.0Vp-p more than
If the level is less than the above, examine the periph-
eral circuits of the unit or replace the pick-up.