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9.5.
Mechanical Adjustment
9.5.1.
ENVELOPE OUTPUT ADJUSTMENT
When replacing the Main Chassis Unit or the Cylinder Unit, be sure to perform the Envelope Output Adjustment as shown below.
1. Remove the Bottom Case Unit and Front Case Unit. (Refer to "Disassembly and Assembly Instructions")
2. Connect the oscilloscope to TP3908 (Envelope) and TP3906 (HID) on the Main P.C.B..
3. Play back the Color Bar Standard Tape (VFM3010EDS or VFM3110EDS). "Envelope" and "HID" signal will be output.
4. Adjust the S1 post by turning the top of post with Post Height Adjustment Fixture (VFK1899) so that the left half of envelope
signal becomes as flat as possible.
5. Adjust the T1 post by turning the top of post with Post Height Adjustment Fixture (VFK1899) so that the right half of envelope
signal becomes as flat as possible.
Fig. M1-1
35
PV-GS90P
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