Zenith IQC50H94 Technical Training Manual - Convergence
20
CONVERGENCE
2. Set video conditions to factory preset.
3. The electric focus should have been coarse ad-
justed.
4. Start adjustment 20 minutes or more after TV is
turned on.
Adjustment Procedure
PROGRESSIVE MODE
1. Receive any NTSC signal.
2. Press the SERVICE ONLY SW on DEFLEC-
TION PWB.
3. Locate the horizontal size VR (R683). Adjustable
the horizotal size to the table below.
HD MODE
1. Input 1080i (fH=33.75kHz) component signal to
VIDEO 1 or 2.
2. Press the SERVICE ONLY SW on DEFLEC-
TION PWB.
3. Locate the horizontal size VR (R686). Adjustable
the horizotal size to the following table.
Size
Progressive Mode
HD Mode
50"
1050mm
1050mm
60"
1200mm
1200mm
Adjust Horizontal Size until the size matches the
chart below.
O
VERTICAL SIZE
· Digital Convergence RAM should be cleared.
With Power Off, press and hold the Service Only
Switch on the Deflection PWB, then press Power.
Adjustment Prerparation
1. The set can face east or west
2. Set video conditions to factory preset.
3. The electric focus should have been coarse ad-
justed.
4. Start adjustment 20 minutes or more after TV is
turned on.
Adjustment Procedure
PROGRESSIVE MODE
1. Receive any NTSC signal.
2. Press the SERVICE ONLY SW on DEFLEC-
TION PWB.
3. Locate the vertical size VR (R630). Adjustable the
vertical size according to the table below.
Size
O
50"
670mm
60"
775mm
Adjust Vertical Size until the size matches the chart
below.
O
BEAM FORM
Adjustment preparation
1. The beam alignment should have been com-
pleted.
2. The raster inclination, centering, horizontal/
vertical amplitude and optical focus adjustments
should have been completed.
3. Set video conditions to Brightness to 90 %
andContrast to MAX.
4. Input the dot signal.
Adjustment procedure
1. Green CRT beam shape adjustment. Short-
circuit 2P sub-mini connectors on Red and Blue
CRT P.W.B.s to project only the Green beam.