Alignment Instructions - Samsung MZ467 Service Manual

ALIGNMENT INSTRUCTIONS
PLEASE READ BEFORE ATTEMPTING SERVICE
1. Line voltage must be kept within 10% of the rated
voltage.
2. When operating at AC voltage, you must adjust
DC B
+
voltage. To get collect B
+,
mode is to
be MDA. and then check B+ which is 12v ±0.1v,
if not, adjust VR706.
3. Do not discharge, ARC, or measure high voltage
when high voltage lead is connected to CRT.
Discharge 2nd anode of CRT only after high
voltage lead has been disconnected. Do not dis-
charge high voltage lead at any time. This may
results damage to transistor.
4. While the monitor is in operation, do not attempt
to connect or disconnect any wires.
5. Disconnect all power before attempting any
repair.
6. When the power is on, do not attempt to short
any portion of the circuit.This shorting may cause
damage to the transistors in the receiver.
ADJUSTMENT
Apply power and video signal(alpha-numeric infor-
mation) to the data display.
CENTERING
1. Loosen the deflection yoke clamp and carefully
move· the yoke on· the neck of the CRT as far
forward as possible. Rotate the yoke until the top
and bottom edges of the raster are straight.
Tighten the clamp.
2. Center the raster by rotating the centering rings.
B
+
ADJUSTMENT
1. Operate the monitor in MDA MODE.
2. Connect the plus pole of DVM (Digital multi meter)
to yellow wire which attached connect registor
and connect the other pole (GND) to chassis
frame.
3. Rotate the B + voltage adjusting control (VR706)
to provide DC 12V. (Tolerance is ±0.1v)
8
SUB-BRIGHTNESS
1. Set contrast(VR511) control to maximum and
brightness(VR415) control about 90 degrees
counterclockwise from fully clockwise portion.
2. Adjust sub-brightness control(VR411) at visual cut
off of the raster.
3. You could change the brightness by another
method in only MDA. To see more or less bright-
ness, you turn VR416.
HORIZONTAL FREQUENCY ADJUSTMENT
( Instrument in use : frequency counter and scope
probe )
1. Connect the PLUS pole of the scope probe to
brown wire of DY and GND pole to chassis frame.
2. Without input signal, adjust the horizontal frequen-
cy control(VR315) so that the horizontal frequency
is 18.00KHZ. (Tolerance is ±100 Hz)
VERTICAL FREQUENCY ADJUSTMENT
( Instrument in use : frequency counter, scope
probe )
1. Connect the GND pole of the scope probe to
chassis frame and the scope probe to DY pin
connected to yellow wire.
2. Without input signal, adjust the vertical frequency
control (VR223) so that the vertical frequency is
41HZ. (Tolerance is ±1 Hz)
HORIZONTAL WIDTH ADJUSTMENT
Adjust the horizontal width control (L40 1 ) so that the
horizontal width of displayed pattern is .230mm.
(Tolerance is ±3 mm)
VERTICAL SIZE ADJUSTMENT
Adjust the vertical size control(VR219,VR220) so that
the vertical of displayed pattern is 170mm.
(Tolerance is ±3 mm)
Height control VR219 (IN MDA MODE)
Height control VR220 (IN CGA MODE)