2-4-5 F.S. (Fail Safe) Adjustment
Note : The finished product has VR (RR402S)
adjusted and glued at the factory.
If necessary, do the F.S. adjustments in the
following sequence.
1. Use a digital multimeter.
2. Connect the digital multimeter to the JIG pin
(DZ482S) terminals
3. Adjust VR (RR402S) so that the voltage
becomes 2.25V.
4. After the adjustments are complete, be sure
to glue VR (RR402S) correctly.
❈
point voltage of 2.25V. Adjust to protect the
CRT and internal circuits from over-voltage,
exceeding 43KV, caused by the Set’s internal
& external conditions.
❈
Conditions enabling the Adjustment
- FBT is replaced
- H/V Module replaced
- 29KV high voltage is adjusted
2-4-6 F.S. (Fail Safe) Circuit Check
Note : The F.S. Circuit check must be performed
after servicing.
1. Turn on the TV.
2. Select the “STANDARD” video mode.
3. Short F/S Test point (located on the SUB
PCB). Then, both sound and picture
disappear. (Note: Even if the shorted
terminals are removed, both sound and
picture do not appear. This proves the F.S.
circuit is working. )
4. To restore both sound and picture, turn off
the TV and reset it after about 30 seconds.
2-4-7 Static Focus Adjustment
Precaution
1. Select the “STANDARD” video mode.
2. Input a crosshatch pattern.
3. Cover the lenses that are not being adjusted.
4. Connect a convergence jig and read data.
5. Adjust the lens for best focus.
(See Fig, 2-1)
STatic focus (continued)
Vary the focus pack VR (Red, Blue) on the
front cabinet. Adjust the TV for best possible
focus around the center of the crosshatch
pattern, without losing overall screen balance.
Figure Crosshatch Pattern
Examine these points together.
2-4-8 Lens Focus Adjustment
PRECAUTIONS
1. Do this adjustment after the static focus
adjustment and the tilt adjustment.
2. Select the “STANDARD” video mode.
(Contrast:100, Brightness:50)
3. Input a crosshatch pattern.
ADJUSTMENT
1. Loosen the lens screws.
2. Cover the two lenses that are not being
adjusted.
3. Adjust the lens, observing the color aberration
vertically and horizontally within 3 blocks of
the center of the crosshatch pattern.
Alignment and Adjustments
2-14
Samsung Electronics
Fig. 2-1 Crosshatch Pattern.
