akira CT-21FD9 Series, Service Manual

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Model No: CT-21FD9CP_21FD9M
Version 1.0
7-1-1. V-SIZE ADJUSTMENT.
- Select the V-SIZE by pressing CH UP/DOWN key
- Adjust the V-SIZE by pressing VOL UP/DOWN key for approximately one-half inch over
scan at top and bottom of picture screen.
7-1-2. V-CENTER ADJUSTMENT.
- Select the V-CENTER by pressing CH UP/DOWN key.
- Adjust V-CENTER so that the vertical center of the picture may be coincident with the
mechanical center of CRT.
7-1-3. H-CENTER ADJUSTMENT.
- Select the H-CENTER by pressing CH UP/DOWN key.
- Adjust the H-CENTER by pressing VOL UP/DOWN key to be agreed with screen center and
mechanical center.
7-1-4. V-LIN ADJUSTMENT.
- Adjust V-LIN by pressing VOL UP/DOWN key.
7-1. V-SIZE / V-CENTER / H-CENTER (F2)
- Receive the video no signal.
- Select the SERVICE mode by pressing CH UP/DOWN key.
- Make the horizontal line by pressing VOL UP/DOWN key.
- Adjust the SCREEN, till horizontal line is just disappeared.
7-2. SCREEN (SERVICE) ADJUSTMENT (F3)
- Receive a black and white pattern or white balance adjusting pattern.
- Before attempting white balance adjustment, the receiver should be operating for at least
15minites.
- Check the all of position to the reference value (nominal center)
- The reference color of the measurement equipment set to G.
- Adjust the CUTOFF G, CUTOFF R, and CUTOFF B at bias mode.
- Adjust the R DRV, B DRV at drive mode.
7-3. WHITE BALANCE ADJUSTMENT (F3)
- Change Mode to VIDEO NO SIGNAL
- Select the NORMAL1 mode in the fuzzy key.
- Select the SUB BRIGHT mode by pressing CH UP/DOWN key in FACTORY2 mode.
- Adjust the SUB BRIGHT value till disappeared to back screen by pressing VOL UP/DOWN.