Hitachi C47-WD8000 Service Manual page 47

SERVICE ADJUSTMENTS
(5) Fine adj.
Adjustment points are 117 points.
(H : 13 points x V : 9 points)
ADJ. points can be moved with using
[2], [4], [5], [6] keys.
For better result, adjust convergence
from center to outside of the screen.
(6) Green convergence adj.
Press [▼ / CH down] key on R/C to select green convergence mode.
Adjust each green line using [▲], [▼], [►],[◄] (cursor) key.
(7) Red convergence adj.
Press [0] key on R/C to select red convergence mode.
Adjust each red lines to green cross-hatch line, using [▲], [▼], [►],[◄] (cursor) key.
(8) Blue convergence adj.
Press [▲ / CH up] key on R/C to select Adjustment point blue convergence mode.
Adjust each blue lines to green cross-hatch line, using [▲], [▼], [►],[◄] (cursor) key.
(9) Calculation *
After convergence adjustment is finished, press [MODE] key on R/C, then the calculation mode starts.
The operation time is about for 0.5 seconds. This operation fills convergence data between each
adjustment points.
(10) Write data to ROM
Press [INDEX] key on R/C.
1st press: "ROM WRITE?" is displayed for alarm.
2nd press: Data starts to write to ROM, it takes about 3 seconds.
And no picture appears during this operation. If green dot pattern appears, writing operation has
been succeeded. Press [MUTE] key to return to the adjustment mode. If red dot pattern appears,
writing operation has been failed.
Replace digital convergence-unit and readjust.
Push the "SERVICE ONLY" switch again to finish the adjustment.
* In fact, above (9) 'Calculation' process by pressing [MODE] key can be omitted, because (10) ROM WRITE
process includes calculation process as well.
ROM WRITE process
by pressing [INDEX] key twice.
: ① Calculation process
: ② Writing data to ROM
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