Zenith R45W47 Service Manual - Adjustment Instructions
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ADJUSTMENT INSTRUCTIONS
3. Beam Alignment Adjustment
3-1. Test Equipment
Video Test Generator(801GF) or Signal Generator that can
produce NTSC DOT pattern(408NPS or 5518/5418
equipment)
3-2. Preliminary steps
(1) Heat run over 45 minutes.
(2) Pre-adjust Raster slope, Raster position, Centering
Magnet & Lens focus.
(3) Check if the Magnet is located 45mm from the end of CRT.
(4) In case of using 801GF : Receive #13 DOT Pattern of
VGA mode(Format #5) through PC input terminal.
In case of using NTSC generator : Receive Dot signal
through the external input terminal.
3-3. 2-Pole Magnet Adjustment
(1) Make Green raster by covering Red and Blue.
(2) Check the center position of DOT pattern on the center of
the screen after turning Green focus volume left.
(3) Turning green focus volume right and adjust 2-Pole
magnet so the position to coincide that of item ”(2)”.
(4) Adjust not to shift the screen by turning green focus
volume clockwise and counter clockwise.
(5) If the screen shifts, readjust (2)~(4).
(6) Do the same method in Red and Blue.
3-4. Beam Shape(4 & 6-Pole Magnet)
Adjustment
(1) Do after 2-Pole magnet adjustment.
(2) Make Green raster using lens cover and turn the focus
volume right.
(3) Make the dot in the center a perfect circle using 4 & 6-Pole
magnet.
(4) Do the same method in Red & Blue.
(5) Fasten the Magnet after adjustment.
(6) Adjust focus accurately.
4. Centering Magnet Adjustment
4-1. Preliminary steps
(1) Receive the image signal.
(2) Select ADJ key on the Service Remote and then select “0
Raster, Center, H/V_Size” move the cursor or using the
key No.
(3) When selecting the adjustment mode, the convergence
resets automatically and then preparation for adjustment
complete.
4-2. Adjustment
(1) Execute adjustment of Red, Green and Blue centering
Magnet.
Locate the Green centering Magnet in middle.
(2) Application the SGS THOMSON CONVERGENCE ASSY,
adjust center of Blue image signal from the center of Green
image signal 30
!
3mm in order to reach this standing with
the left side, adjust center of Red image signal from the
center of Green image signal 30
!
3mm in order to reach
this standing with the right side
(3) After adjustment complete, exit the RASTER adjustment
mode using ENTER key and exit the SVC adjustment
mode using ADJ key.
5. High Voltage Regulation Adjustment
5-1. Test Equipment
Digital Multi-Meter(DMM)
5-2. Preliminary steps
Select TV/AV key on the Remote Control and setting to A/V
no signal.
5-3. Adjustment
(1) Connect DMM to the P415(+), P416(-) of Deflection Board.
(2) Adjust VR401 so that the P415(+), P416(-) voltage is
21.7
!
0.1V. (High voltage 31.5KV)
45mm
45mm
2 Pole Magnet
4 Pole Magnet
6 Pole Magnet