Elevation Adjustment - Pioneer CRT3452 Service Manual

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6.4 ELEVATION ADJUSTMENT

A
- This adjustment shall be performed when an error code 84 is displayed for an elevation error.
• Precautions
This mechanism unit uses a slide variable resistor to detect the height of the stage.
To absorb misalignment of the stage height due to unevenness of the DVD/CD mechanism unit and main unit,
the adjustment for each mechanism unit needs to be performed using semi-fixed resistors.
Because adjustment is performed on the production line, readjustment is not necessary usually. However, if an
elevation error occurs or when the slide variable resistor, spindle motor and CRG
chassis are replaced, elevation needs to be adjusted in the following procedures:
• Purpose
B
Adjust and check that the operation of elevation is normal.
• Adjustment method
• Measuring apparatus
• Measuring point
• Setting state
C
D
• Check procedures
For the flowchart of the test mode.
1. Enter the test mode and select a multiple DVD/CD player.
E 2. Set the mechanism unit test mode.
F
70
1
2
Oscilloscope, L.P.F. (one piece)
EREF or EPVO
Without magazine, test mode
Place the DVD/CD mechanism unit facedown (place the DVD/CD mechanism unit so
that the main unit may be set to the upper side).
MAIN UNIT
XDV-M8357ZT/UC
2
3
PCB UNIT(B)
L.P.F.
EREF
47kΩ
EPVO
1µF
VR302
Display on head unit
3
4
Oscilloscope
0 0 8 0 0 0 0 0
2 0 4 0 0 0 0 0
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