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1) Shift the rear panel to the right side (LED side) so that the Main Board Assy can be viewed.
* At that time, put a Back Panel completely to the end of the main board Assy so that the outer light does not
influence the CCD waveform.
2) Connect the probe of an oscilloscope to the Main Board Assy. (See Figure 3.)
• Connect GND in Ch1 to J2, connect the measurement pin in Ch1 to J1.
• Connect GND in trigger (or Ch2 ) to J4.
• Connect the measurement pin in trigger (or Ch2 ) to J3.
• Set the Ch1 mode to 1.0 V/DIV AC.
• Set the trigger to 2 V/DIV DC.
• Set the sweep to 400 ~ 500
µ
sec/DIV.
* Set the trigger to EXT or Ch2. Only Ch1 is displayed.
* For a new Main Board Assy volume control R82 is not installed because of automatic adjustment.
ADJUSTMENT
J1
J2
J3
J4
3) Temporary focus adjustment
Adjust the lens to the reference position and fix the
two lens fixing screws temporarily. (See Figure 4.)
* Install the lens so that the lens marking is located
horizontally and toward you.
V-shaped groove of plate
and holder Fix the lens so
that it aligns with mark.
Lens fixing
screws
(Temporary)
Fig. 3 Main Board Assy
Fig. 4 Temporary focus adjustment
