Table of Contents
Warnings
1.
10.
1.
Warning and Notes
Satety regulations require that the unit should be returned
1.
in its original condition and that components identical to
the original components are used. The safety components
are indicated by the symbol
In order to prevent damage to ICs and transistors, all
high-voltage flash-overs must be avoided. In order to
prevent damage to the picture tube, the method shown
in Fig. 1 shoutd be used to discharge the picture tube.
2.
Use a high-voltage probe and a multimeter (position DC-V).
Discharge until the meter reading is 0 V (after approximately
30 seconds).
esp &
All ICs and many other semiconductors are sensitive to
electrostatic discharges (ESD). Careless handling during
repair can drastically shorten their life. Make sure that
during repair you are connected by a pulse band with
resistance to the same potential as the ground of the unit.
Keep components and tools also at this same potential.
When repairing a unit, atways connect it to the AC Power
voltage via an isolating transformer.
Be careful when taking measurements in the high-voltage
section and on the picture tube panel.
It is recommended that saferty goggies be worn when
replacing the picture tube.
When making adjustments,use piastic rather than metal tools.
This will prevent any short-circuit or the danger of a
circuit becoming unstable.
Never replace modules or other components while the
unit is switched on.
Together with the defleciton unit, the picture tube is used
as an integrated unit. Adjustment of this unit during repair
is not recommended.
After repair, the wiring should be fastened in place with
the cable clamps.
All units that are returned for service or repair must pass
the original manufactures safety tests.
44 Go to cover page
Notes
The direct voltages and waveforms are average voltages.
They have been measured using the Service test software
and under the following conditions :
-
Mode : 640° 480 (31.5kHz / 60Hz)
-
Signal pattem : grey scale
-
Adjust brightness and contrast control for the
mechanica! mid-position (click position)
The picture tube panel has printed spark gaps.
Each spark gap is connected between an electrode of the
picture tube and the Aquadag coating.
The semiconductors indicated in the circuit diagram(s)
and in the parts lists are completely interchangeable per
position with the semiconductors in the unit, irrespective
of the type indication on these semiconductors.
Fig.1
Kiq Go to cover page
1.
General point
V1
During alignment and measurement supply a distortion
tree AC-mains voltage to the apparatus via anisolating
transformer with a low internal resistance.
1.2
All voltages have to be measured or applied with respect
to ground, unless otherwise stated. Note:
Not ail heatsinks
are grounded, avoid using heatsinks as ground.
1.3
The term "Linear RGB" is meant the 0.7 Vpp video with
separate SYNC (TTL Level ). Reference
tactory preset
mode timings (format of pattern generator CHROMA-2135)
are shown in TABLE 1 to TABLE 8. Preload timing
TABLE 9 to TABLE 22.
1.4
Any external voltage source should have low internal
impedance.
1.5
The alignment has to be done in room
temperature 25 5C.
1.6
Digit control buttons for
OSD MENU:
LANGUAGE
ZOOM
ADJUST HORIZONTAL - POSITION
- SIZE
ADJUST VERTICAL
- POSITION
- SIZE
ADJUST SHAPE
-
ADJUST
SIDE CURVE
- PINCUSHION
- BALANCE
- ADJUST SIDE ANGLES
- TRAPEZOID
- PARALLELOGRAM
- ROTATE IMAGE
ADJUST COLOR
- 3colour temperatures (9300K, 6500K, SRGB)
- 1 user preset independent AGB adjustment
RESET TO FACTORY SETTING
EXTRA CONTROLS
- ADJUST MOIR
- HORIZONTAL
- VERTICAL
- DEGAUSSING
MODEL SELECT
CLOSE MAIN CONTROLS
2.
Pre warm-up
==
2.4
Align in pre-warmed condition at least 30 minutes during
Manufacturing.
3.
Main chassis alignment
3.1
Power supply adjustment :
All supply voltages were fixed and adjustment is
unnecessary. {Check the voltages on Chassis line)
3.2
Apply a VGA31.5KHz/480 fines cross-hatch
signal.
3.2.1
Adjust BPLUS of factory setting to obtain the
anode voltage 25.0KV+/-1KVat zero beam current.
3.3
Monitor the following auxiliary voltages.
+5
source across 7153 PinoutandGND
+5V
+ 0.15VDC
+6
source across C2154
+6.2V
+ 0.2VDC
+12 source across C2155
+12.6V
+ 0.4
VDC
-12 source across C2156
-12.5V
40.4
VOC
+82 source across C2153
+82.0V
+ 1.5
VDC
+190
source across C2152 (+ to Gnd)
+190.5V
+ 3.0
VDC
-96 source across C2630
-96V
+ 6.0 VDC
4.
General
conditions
for aging and alignment
=
=
som:
4.1
Aging/burn-in:Use low mains AC supply (90Vac) for monitor
first power on test.Pre-adjust the Focus till cross hatch
pattern can be clearly visibie then enter the agingmode.
(Press both Up and Down keys, and then switch-on the
monitor with signal cabie disconnected.)
4.5
4.3
44
4.5
4.6
4.7
4.8
5.1
Electrical Instructions
During all alignments. supply s distortion bee AD mains
voltage to the monitor set via an isolating transformer with
tow internal impedance.
All measurements are carried out at nominal mains voltage,
unless otherwise stated.
Align in pre-warmed condition, at least 30 minutes warm-up
with nominal
light output.
Purity, geometry and subsequent alignments should be
carried out in a magnetic cage with correct magnetic field.
Northern Hemisphere:
H=0, V= 450mG,Z=0
Southern Hemisphere:
H=0, V=-500mG,Z=0
Equatorial Support
:H=0,V=
omG,Z=0
All voltages are to be measured or applied with respect to
ground , unless otherwise statec.Attention : Not all
heatsinks are GND, avoid using heatsinks as ground.
The white balance and purity has to be adjusted in dully
lighted room.
All alignments have to be done in a room with a temperature
Of 25 10C.
Alignment of Vg2, cut-off point, white tracking
ZRETRCERSRESSecesc=
EEPROM data has to be pre-set according to software
approval sheets, sheet-139,
sheet-140: (loaded beforehand with average values of
mode pre-set data and mode pre-set selection bytes.) The
following table is for reference only.Optimum values should
be determined by Factory(ME) for every production
batch.
In factory, alignments are done vial'C on the I/F cable
DDC bus,
butthe set can
also be manually aligned.
Enter factory mode
by pressing both Up and Down
keys while power-on.
Setect factory.
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