Zenith R45W47, Service Manual

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ADJUSTMENT INSTRUCTIONS
6. CUT-OFF Voltage Adjustment
6-1. Preliminary steps
Select ADJ key on the service Control and then select “1.
Cut-off” by moving the cursor or using the key No.
6-2. Adjustment
(1) Test Equipment: Oscilloscope, 100:1 Probe
(2) Connect oscilloscope to cathode of R, G, B(R926R/B/G:
SCREEN ADJ on the PCB) and GND.
(3) Turning Screen Volume (R/G/B) in Focus Pack and adjust
R/G/B is 165V
!
0.5V.
(4) After adjustment complete, exit the CUT-OFF adjustment
mode using ENTER key and exit the SVC adjustment
mode using ADJ key.
7. Deflection Adjustment
7-1. Preliminary steps
(1) Select ADJ key on the Service Remote and then select “0
Raster, Center, H/V_Size” move the cursor or using the
key No.
(2) Make Green raster using lens cover.
7-2. Adjustment
(1) Select the below each mode using CH
D
, CH
E
on the
Service Remote Control and adjust using VOL
G
, VOL
F
.
(2) Check the H-Position, V-Position is 28, 26 and When is
wrong, adjust each at corresponding setting.
(3) Does not adjust H, V-Position, adjust with centering
magnet.
(4) H SIZE : Horizontal SIZE Adjustment
Adjust until third line of circle outermost horizontal size is
accord with the edge of the frame.
(5) V-SIZE : Vertical SIZE Adjustment
Adjust until fifth Vertical BAR from upper and lower center
of the screen is accord with the last point of the frame.
(6) Pin-Amp : Pincushion Correction
Adjust the vertical line of most angle lattice of right/ left of
screen to be balance with vertical line of center the screen.
(7) Pin-Phase : Pincushion Phase Correction
Adjust the horizontal width of screen upper and lower is to
be same.
(8) Up-CPin : Upper Pincushion Correction
Adjust the pincushion of upper area of the screen.
(9) Lo-CPin : Lower Pincushion Correction
Adjust the pincushion of lower area of the screen.
(10) AFC-Bow : Upper/Lower Vertical BOW Adjustment
Adjust the BOW of upper and lower area of the screen.
(11) AFC-Angle : Upper/Lower Vertical ANGLE Adjustment
Adjust the ANGLE of upper and lower area of the screen.
(12) After adjustment complete, exit the RASTER adjustment
mode using ENTER key and exit the SVC adjustment
mode using ADJ key.
8. Lens Focus and Electric Focus
Adjustment
8-1. Preliminary steps
(1) Electric focus,Raster slope & Raster position must be pre-
adjusted.
(2) Heat-run over 45 minutes.
(3) Tune the TV set to receive Cross Hatch
(4) Adjustment must be operated in a dark room(simple dark
room) and pay attention not to touch the lens during
adjustment.
(5) Make any one color raster using lens cover.
(6) Rotating lens right from the front side chromatic aberration
occurs beside Cross-hatch line changes as follows;.
0V
165V
±
0.5V
Fifth Vertical Bar
Third Line
CHROMATIC
ABERRATION
CROSS HATCH
SIGNAL
Lens
Red
Green
Blue
Change of chromatic aberration
Orange
$
Scarlet
Blue
$
Red
Purple
$
Green