Samsung SM0-150TPV, Service Manual

Alignment and Adjustments 

Samsung Electronics

3-5

3-4 Other Adjustment

3-4-1GENERAL

1.  Usually, a color Monitor needs only slight

touch-up adjustment upon installation.  Check
the basic characteristics such as height,
horizontal and vertical sync and focus.  

2. The picture should have good black and white

details.  There should be no objectionable
color shading; if color shading is present,
perform the purity and convergence
adjustments described below.

3. Use the specified test equipment or its

equivalent.

4. Correct impedance matching is essential.  

5. Avoid overload. Excessive signal from a sweep

generator might overload the front-end of the
Monitor.  When inserting signal markers, do
not allow the marker generator to distort test
results.

6.  Connect the Monitor only to an AC power

source with voltage and frequency as specified
on the backcover nameplate.

7.  Do not attempt to connect or disconnect any

wires while the Monitor is turned on.  Make
sure that the power cord is disconnected
before replacing any parts. 

8.  To protect against shock hazard, use an

isolation transformer.

3-4-2  AUTOMATIC DEGAUSSING

A degaussing coil is mounted around the
picture tube, so that external degaussing after
moving the Monitor should be unnecessary.
But  the receiver must be properly degaussed
upon installation.  

The degaussing coil operates for about 1
second after the power is switched ON.  If the
set has been moved or turned in a different
direction,  disconnect its AC power for at least
30 minutes.

If the chassis or parts of the cabinet become
magnetized, poor color purity will result.  If
this happens, use an external degaussing coil.
Slowly move the degaussing coil around the
faceplate of the picture tube and the sides and
front of the receiver.  Slowly withdraw the coil
to a distance of about 6 feet before removing
power.  

3-4-3 HIGH VOLTAGE CHECK

CAUTION:  There is no high voltage adjustment on this chassis.

The B+ power supply must be set to +125 volts (Full color  bar input
and normal picture level).

1.   Connect a digital voltmeter to the second

anode of  the picture tube.

2.   Turn on the Color Monitor.  Set the  Brightness

and  Contrast controls to minimum (zero
beam current).  

3.   The high voltage should not exceed 31KV.

4.   Adjust the Brightness and contrast controls to

both extremes.  Ensure   that the high voltage
does not exceed 31KV under any conditions.

3-4-4 FOCUS ADJUSTMENT

1.   Input a black and white signal.

2.   Adjust the tuning control for the clearest

picture.

3.   Adjust the FOCUS control for well defined

scanning lines in the center area of the screen.