Hitachi CM615ET, Service Manual

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5
J. Power Adjustment
J-1. Adjust the VR980, have the +15Vs be 15.3v
±
0.1v (the voltage of the C944) in timing 1.
J-2. Check below items the voltage of C949 : 179
±
3v
J-3. Short-circuit protection function check
when short the C944, all output voltage should be shut down and unlatch
J-4. Side Pincushion, Tilt and Geometry Distortion Adjustment
1. Input timing 1, adjust the display be normal position and size.
2. Adjust front control key to get the best pincushion distortion and tilt.
3. Select P502 and adjust VR402~VR404 to get the best geometry distortion.
J-5. Focus Adjustment
1. Input timing 1, EXT. BRIGHTNESS move to center position. Use EXT.CONTRAST set the
brightness to 25FL.
2. Adjust Focus VR (mounting on F.B.T), to get best focus.
C947 : 75
±±±±
2v
C946 : 44
±±±±
1.5v
C940 : 8.4
±±±±
0.4v
the power source is 230vac input
when recover normal condition, all output voltage should recover automatically.