DAEWOO ELECTRONICS CO., LTD.
OVERSEAS SER VICE DEPT .
Page 2
CONTENTS
SAFETY PRECAUTIONS1
GENERAL SAFETY INFORMATION2
SERVICING PRECAUTIONS3
TECHNICAL INFORMATION6
GENERAL INFORMATION7
PIN CONNECTOR8
CAUTIONS FOR ADJUSTMENT AND REPAIR8
ALIGNMENT PROCEDURE9
TROUBLESHOOTING HINTS11
OPERA TION & ADJUSTMENT25
BLOCK DIAGRAM29
PCB LA YOUT30
SCHEMA TIC DIAGRAM34
EXPLODED VIEW DIAGRAM38
REPLACEMENT PARTS LIST39
P AR TS LIST 40
Page 3
SAFETY PRECAUTIONS
CAUTION: No modifications of any circuit should be attempted. Service work should only be performed after
you are thoroughly familiar with all of the following safety check and servicing guidelines.
Safety Check
Care should be taken while servicing this analog color display because of the high voltages used in the deflection
circuits. These voltages are exposed in such areas as the associated flyback and yoke circuits.
Fire & Shock Hazard
¡
Insert an isolation transformer between the analog color display and AC power line before servicing chassis.
¡
In servicing, pay attention to original lead dress especially in the high voltage circuit. If a short circuit is found,
replace all parts which have been overheated as a result of the short circuit.
¡
All the protective devices must be reinstalled per original design.
¡
Soldering must be inspected for possible cold solder points, frayed leads, damaged insulation, solder splashes or
sharp solder points. Be certain to remove all foreign materials.
Implosion Protection
Picture tube in this monitor employs integral implosion protection system, but care should be taken to avoid damage
and scratching during installation.
Use only same type replacement picture tubes.
IMPORTANT SAFETY NOTICE : There are special components used in analog color display, which are
important for safety. These parts are shaded on the schematic diagram
and on the replacement parts list. It is essential that these critical parts
should be replaced with manufacturer's specified parts to prevent Xradiation, shock, fire or other hazards. Do not modify the original design
without getting a written permission from DAEWOO ELECTRONICS CO.
or this will void the original parts and labor warranty.
X-Radiation
WARNING : The only potential source of X-Radiation is the picture tube. However when the high voltage circuitry
is operating properly, there is no possibility of an X-Radiation problem. The basic precaution which
must be exercised is to keep the high voltage at the following factory recommended level.
NOTE : It is important to use an accurate, periodically calibrated high voltage meter.
¡
To measure the high voltage, use a high-impedance high-voltage meter.
Connect(-) to chassis and (+) to the CRT anode button.
¡
Turn the Contrast & Brightness control fully counterclockwise.
¡
Measure the high voltage. The high voltage meter should indicate the following factory recommended level.
¡
If the upper meter indication exceeds the maximum level, immediate service is required to
prevent the possibility of premature component failure.
¡
To prevent X-Radiation possibility, it is essential to use the specified picture tube.
¡
The nominal high voltage is 25.5KV or below, and must not exceed 29KV at zero beam current
at rated voltage.
1
Page 4
GENERAL SAFETY INFORMATION
T erms in the manual
CAUTIONStatements identify conditions or practices that could result in damage to the equipment or other
property.
WARNING Statements identify conditions or practices that could result in personal injury or loss of life.
T erms as marked on equipment
CAUTIONStatements indicate a personal injury hazard not immediately accessible as one reads the
marking, or a hazard to properly including the equipment itself.
WARNING Statements indicate a personal injury hazard immediately accessible as one reads the marking
Symbols in the manual
This symbol indicates where applicable cautionary or other information is to be found.
Symbols as marked on equipment
Protective GROUND terminal
High V oltage Warning And Critical Component Warning Label
Following warning label is on the CRT PWB shield case inside the unit.
Warning : This product includes critical
mechanical and electrical parts which are
essential for X radiation safety . For continued
safety , replace critical components indicated
in the service manual only with exact
replacement parts given in the parts list.
Operating high voltage for this product is
25KV at minimum brightness. Refer to
service manual for measurement procedures
and proper service adjustments.
2
Page 5
SERVICING PRECAUTIONS
CAUTION: Before servicing instruments covered by this service manual, its supplements and addenda, read
and follow the SAFETY PRECAUTIONS of this manual.
NOTE: If unforeseen circumstances create conflict between the following servicing precautions and any of
the safety precautions on page 1 of this manual, always follow the safety precautions.
Remember: Safety First.
General Servicing Precautions
1. Always unplug the AC power cord from the AC power source before:
a. Removing or reinstalling any component, circuit board, module, or any other instrument assembly.
b. Disconnecting or reconnecting any electrical plug or other electrical connection.
c. Connecting a test substitute in parallel with an electrolytic capacitor in the instrument.
CAUTION: A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in
a explosion hazard.
d. Discharging the picture tube anode.
2. Test high voltage only by measuring it with an appropriate high voltage meter or other voltage measuring device
(DVM, FETVOM. etc. ) equipped with a suitable high voltage probe. Do not test high voltage by "drawing an arc".
3. Discharge the picture tube anode only by: (a) first connecting one end of an insulated clip lead to the degaussing
or line grounding system shield at the point where the picture tube socket ground lead is connected, and then (b)
touching the other end of the insulated clip lead to the picture tube anode button, using an insulating handle to
avoid personal contact with high voltage.
4. Do not any spray chemicals on or near this instrument or any or its assemblies.
5. Unless specified otherwise in this service manual, clean electrical contacts by applying the following mixture to the
contacts with a pipe cleaner, cotton-tipped stick or comparable nonabrasive applicator: 10% (by volume) Aceton
and 90% (by volume) isopropyl alcohol (90% - 99% strength).
CAUTION: This is a flammable mixture. Unless specified otherwise in this service manual, lubrication of
contacts is not required.
6. Do not defeat any plug/socket B+ voltage interlocks with which instruments covered by this service manual might
be equipped.
7. Do not apply AC power to this instrument and/or any of its electrical assemblies unless all solid -state device heat
sinks are correctly installed.
8. Always connect the test instrument ground lead to the appropriate instrument chassis ground before connecting
the test instrument positive lead. Always remove the test instrument ground lead last.
9. Use only the test fixtures specified in this service manual with this instrument.
CAUTION: Do not connect the test fixture ground strap to any heatsink in this instrument.
3
Page 6
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity.
Such components commonly are called Electrostatically Sensitive (ES) Devices.
The examples of typical ES devices are integrated circuits, some field-effect transistors and semiconductor "chip"
components. The following techniques should be used to help reduce the incidence of component damage caused
by static electricity.
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any
electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a
commercially available discharging wrist strap device which should be removed for potential shock reasons prior
to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface
such as aluminum foil to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static type solder removal device. Some solder removal devices not classified as "anti-static"
can generate enough electrical charges to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate enough electrical charges to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to
install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam,
aluminum foil or comparable conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the
protective material to the chassis or circuit assembly into which the device will be installed.
CAUTION :Be sure that no power is applied to the chassis or circuit, and observe all other safety
precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmful motion such as
the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate enough
static electricity to damage an ES devices).
General Soldering Guidelines
1. Use a grounded-tip, low-wattage soldering iron with appropriate tip size and shape that will maintain tip
temperature within a 550¢ -600¢ (288¡ -316¡ ) range.
2. Use an appropriate gauge of RMA resin-core solder composed of 60 parts tin/40 parts lead.
3. Keep the soldering iron tip clean.
4. Thoroughly clean the surface to be soldered. Use a small wire-bristle(0.5 inch or 1.25cm) brush with a metal
handle. Do not use freon-propelled spray-on cleaners.
5. Use the following soldering technique:
a. Allow the soldering iron tip to reach normal temperature (550¢ to 600¢ or 288¡ to 316¡ )
b. Hold the soldering iron tip and solder strand against the component lead until the solder melts.
c. Quickly move the soldering iron tip to the junction of the component lead and the printed circuit foil, and hold
it there only until the solder flows onto and around both the component lead and the foil.
d. Closely inspect the solder area and remove any excess or splashed solder with a small wire-bristle brush.
CAUTION: Work quickly to avoid overheating the circuit board printed foil.
4
Page 7
FIGURE 1. USE SOLDERING IRON TO PRY LEADS
IC Removal/Replacement
Some utilized chassis circuit boards have slotted (oblong) holes through which the IC leads are inserted and then
bent flat against the circuit foil. When holes are slotted, the following technique should be used to remove and
replace the IC. When working with boards using the familiar round hole, use the standard technique as outlined in
paragraphs 5 on the page under the title of general soldering guidelines.
Removal
1. Desolder and straighten each IC lead in one operation by gently prying up on the lead with the soldering iron tip
as the solder melts.
2. Draw away the melted solder with an anti-static suction-type solder removal device (or with desoldering braid)
before removing the IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and solder it.
3. Clean the soldered areas with a small wire-bristle brush. (It is not necessary to reapply acrylic coating to the
1. Remove the defective transistor by clipping its leads as close as possible to the component body.
2. Bend the end of each of three leads remaining on the circuit board into a "U" shape.
3. Bend the replacement transistor leads into a "U" shape.
4. Connect the replacement transistor leads to the corresponding leads extending from the circuit board and crimp
the "U" with long nose pliers to insure metal-to-metal contact, then solder each connection.
5
Page 8
Power IC, Transistor or Devices Removal/Replacement
EXITMENUADJUSTSELECT
–+
1. Heat and remove all solders from the device leads.
2. Remove the heatsink mounting screw(if applicable).
3. Carefully remove the device from the circuit board.
4. Insert new device in circuit board.
5. Solder each device lead, and clip off excess lead.
6. Replace heatsink.
Diode Removal/Replacement
1. Remove defective diode by clipping its leads as close as possible to diode body.
2. Bend the two remaining leads perpendicularly to the circuit board.
3. Observing diode polarity, wrap each lead out of the new diode around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect the solder joints of the two "original" leads on the circuit board copper side. If they are not shiny, reheat
them and apply additional solder if necessary.
TECHNICAL INFORMATION
Electrical
CRT dot pitch0.28mm dot pitch
Horizontal frequency30KHz to 69KHz (Automatically)
Vertical frequency50Hz to 120Hz (Automatically)
Operating temperature10-40¡ /50-104¢
Operating humidity8-80%
Mechanical
CabinetMolded Plastic Cabinet with detachable tilt & swivel base
Dimension (set with stand)381.5(H)¡¿368(W)¡¿394(D) mm
Weight (net)14.2 Kg
ControlsPower Switch
OSD Key
Contrast
Brightness
Horizontal Position
Horizontal Size
Vertical Position
Vertical Size,
Pincushion
Trapezoid
Parallegram
Pin Corner
Pin Balance
R Gain, G Gain, B Gain
Color Temp
Recall
Degauss
Moire
System Spec
Tilt (Optional)
6
Page 9
GENERAL INFORMATION
This color monitor automatically scans all horizontal frequencies from 30KHz to 64KHz, and all vertical frequencies
from 50Hz to 120Hz. This color monitor adopted the OSD (On Screen Display), it shows the sync polarity and
frequency and it provides that easily adjust control. This color monitor supports IBM PC, PC/XT, PC/AT, personal
System/2 (PS/2), Apple Macintosh, and compatible users crisp text and vivid color graphics diaplay when using the
following graphics adapters : (VGA, 8514/A, Supper VGA, VESA and XGA and Apple Macintosh Video Card). And
so, this color monitor has a maximum horizontal resolution of 1280 dots and a maximum vertical resolution of 1024
lines for superior clarity of display.
By accepting analog signal inputs which level is zero to 0.7 Volts. This color monitor can display an unlimited palette
of colors depending on the graphics adapter and software being used.
Abbreviations
ADJAdjustment
AFCAutomatic Frequency Control
CRTCathode Ray Tube
DefDeflection
D.YDeflection Yoke
FBTFlyback Transformer
H.SYNCHorizontal Synchronization
OSCOscillator
P.S.UPower Supply Unit
PWAPrinted Circuit Board Wiring Assembly
R.G.BRed, Green, Blue
V.SyncVertical Synchronization
Degaussing is always required when adjusting purity or convergence.
¡
The white balance adjustment has been done by a color analyzer in factroy. The adjustment procedure, described
in the service manual is made by a visual check.
¡
Allow 20 minutes warm-up time for the display before checking or adjusting only electrical specification or function.
¡
Reform the leadwire after any repair work.
Caution For Servicing
¡
In case of servicing or replacing CRT, high voltage sometimes remains in the anode of the CRT. Completely
discharge high voltage before servicing or replacing CRT to prevent a shock to the serviceman.
8
Page 11
ALIGNMENT PROCEDURE
Standard Adjustment Conditions
1. Power source voltage : 90~264Vac 50/60Hz
2. Aging : Take at least 20 minutes warm-up time.
3. Signals
Video : Analog 0.7Vpp 75Ω terminal positive polarity
Synchronizing : TTL level Negative/Positive Separate/Composite
Deflection frequency
Horizontal Frequency : 30 KHz - 69KHz
Vertical Frequency : 50Hz - 120Hz
Pre-Adjustment
1. B+ Adjustment
Adjust 145.5Vdc¡ 0.5Vdc between TP1 and ground at 69KHz mode, varying VR104.
Main Adjustment
1. Setting the Controls
Set the value of items as following.
Contrast : Max. (OSD value up to MAX)
Brightness : Center (Set the OSD value to center)
Receive the cross hatch pattern of Factory preset mode.
H.Size, V.size, H.phase, V.position, Pincushion, Trapezoid are adjusted at each mode.
In Factory, Auto Alignment was done at each mode. Therefore, Factory preset mode has it's
own value according to each control.
3. Focus
(a) Set brightness control to center and contrast control to MAX.
(b) Receive all "H" character pattern of 69KHz mode signal.
(c) Adjust the Focus control of FBT to obtain best Focus (static focus and Dynamic focus).
4. Geometric Distortion Adjustment.
(a) Receive the cross hatch pattern of 69KHz mode signal.
(b) Pin balance, Pin center, Pin corner, Parallelogram are adjusted the best geometric status.
5. White Balance Adjustment
(a) Select 9300¡£K on the OSD Menu.
(b) Receive a cross hatch pattern of 60KHz mode signal by using the signal generator.
(c) Set the brightness control to the center, the contrast control to the maximum and sub contrast
control VR to the center.
(d) Cut off the FBT screen VR.
(e) Set the brightness control to the maximum and receive all the black patterms.
(f) Select the R-BIAS, G-BIAS and B-BIAS on the OSD menu and adjust the DATA +/- key to
get the color coordinates in x=0.281, y=0.311.
(g) Receive al full white pattern.
(h) Select the R-GAIN, G-GAIN and B-GAIN and adjust Data +/- key to get the color coordinates in
x=0.281¡ 0.05, y=0.311¡ 0.05
(i) Set the brightness control to the center and adjust the sub contrast control to get the screen
luminosity to 30t/L(a full white pattern over 30Ft/l).
(j) Check if the x,y coordinates of color analyzer is in X=0.281¡ 0.05, Y=0.311¡ 0.05.
If the color coordinates is out of range, adjust the R. G. B BIAS & GAIN to get the coorinates in
X=0.281, Y=0.311. Make sure that the coordinates is in range by using contrast control.
9
Page 12
(k) Select 6550¡£K on the OSD Menu and set the color coordinates in X=0.313, Y=0.329 at the maximum
contrast control and center brightness control.
(l) Check if the a full white pattern is over 30Ft/L. If you satisfied with the result, readjust the internal sub contrast
VR.
6. Static Convergence Adjustment
(a) Apply a magenta cross hatch pattern on display
(b) Adjust the focus from the best over all focus on the display.
Also adjust the brightness to the desired condition
(c) Vertical red and blue lines are converged by varying the angle between the two tabs of the 4-pole magnets.
(d) Horizontal red and blue lines are converged by varing the tabs together, keeping the angle between them
constant.
(e) Apply a white cross hatch pattern on display.
(f) Vertical green and magenta lines are converged by varing the the angle between the two tabs of the 6-pole
magnets.
Horizontal green and magenta lines are converged by varing the tabs together, keeping the angle between them
(g)
constant.
10
Page 13
TROUBLESHOOTING HINTS
Yes
Yes
No
About 45Vpp
Yes
No
No
No Character
Are the
Contrast &
Brightness Controls
maximum ?
Is
whole screen
bright?
Is CRT
Cathode (Rk, Gk, Bk)
signal level
normal?
Is
13Vdc line
normal?
Is the
output signal of the
(pin 20, 25, 30) pre-amp
(IC801, TDA4885)
normal?
Rk, Gk, Bk
Change the Contrast &
Brightness control value
to maximum
No Raster
Check the peripheral
circuit of CRT
Check the Video output
circuit and IC801
(pin 20, 25, 30) and
their ambient circuit
Refer to
No Raster
Yes
No
No
Trouble in 13Vdc line
of the Main PWB
Check the clamping
pulse circuit
Is
clamping pulse
(pin 5 of IC801)
normal?
No
Check the
signal cable
Is
input signal
normal?
Trouble in IC801 and
its ambient circuit
No
Yes
Yes
Yes
5Vpp
1. No Character
11
Page 14
2. No Raster
No
No
Refer to trouble in
power supply unit.
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Refer to trouble
in P.S.U
Is
Heater Voltage
(CRT PWB)
about
6V?
Is
CRT heater
red-hot?
Is
whole screen
bright?
Check
G1 voltage about
-55V?
Is CRT
G2 (screen) voltage
about 500V?
Is
85Vdc line
normal?
Yes
Does
increasing of the
Brightness control level
make screen
bright?
No
No
No Raster
Increase the Brightness
& Contrast control level
fully Maxium
Trouble in
power supply
circuit
Trouble in
video
circuit
Trouble in
CRT
Trouble in G1
line of Main
PWB
Trouble in FBT
Trouble in 85Vdc
line of power
supply unit
No High Voltage
trouble in FBT
Raster OK
12
Page 15
3. A Missing Color
No
No
No
No
RK, GK, BK
About 45V p-p
No
Yes
Yes
Yes
Yes
0.7Vpp
Check video signal
cable or video card.
Trouble in
IC801 or its
ambient circuit
Trouble in G1 line
and G2 line
One color is
missing
Is
input signal
normal?
Is the
output of pre-amp
(IC801, TDA4885)
pin 20, 25, 30
all normal?
CRT
Cathode (Rk, Gk, Bk)
is normal?
Each
grid (G1, G2)
voltage
normal?
Is
video output
Q803, Q813, Q823
waveform
normal?
Trouble in
video output
circuit,
Q803, 804
Q813, 814
Q823, 824
or ambient
Trouble in
85/13Vdc line
Replace CRT
Yes
13
Page 16
4. Abnormal OSD Font
No
Yes
Yes
Trouble in IC801
and its ambient
circuit
Trouble in IC301
and its ambient
circuit
Trouble in
IC301 or its
ambient circuit
Abnormal OSD Font
Is menu
key selected?
Is OSD Font
exist?
No
Is
the Fast
Blanking signal
(pin 12 of IC301)
normal?
No
Yes
Is the
input of IC301
(pin 13, 14, 15)
normal?
Yes
One color is
missing
Refer to Missing Color
* If menu key selected.
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Page 17
5. Horizontal Output Circuit
12Vp-p
Yes
Yes
Yes
Yes
Is
B+ line voltage
normal?
Is
Q502 base
waveform
normal?
MODE
VGA
S.VGA
VESA S.VGA
XGA
Hf=68KHz
No
No
No
Trouble in FBT
No
Refer to trouble
in power supply
unit
Trouble in power
supply circuit
Yes
No
Trouble in Q501, T503
Q501, Q510, Q511
and its ambient cirucit
Check the circuit of
13Vdc line
No
Trouble in IC501.
Trouble in H.Sync line
Trouble in Horizontal
output circuit
(No Raster)
Is
Q501 Gate
waveform
normal?
Is
IC501 8pin
H.DRV waveform
normal?
Is
IC501 pin 10
voltage about
13V?
Yes
Is
the input H.Sync
correct?
TP1 Voltage
66Vdc
82Vdc
103Vdc
116Vdc
145Vdc
10Vp-p
14.5Vp-p
15
Page 18
6. Unstable Picture
Yes
No
Trouble in IC501
or its ambient
circuit
Unstable
picture
Is the
pulse of pin 10 of
the IC501
correct?
Yes
No
Check IC201 and
its ambient circuit
Is the
pulse of pin 21 of
the IC201
correct?
Yes
No
Check the Q203 and
its ambient circuit
Is the
input H.Sync
correct?
Trouble in Signal Cable
or 15P D-Sub Connector
6.1 Horizontal
16
Page 19
6-2.Vertical
No
Yes
Refer to the
P.S.U
Unstable
picture
Is the
13Vdc line
voltage is correct?
Yes
No
Troube in
vertical D.Y
Is the
pulse of pin 6.4 of
the IC401
correct?
Yes
No
Check the IC401 and
its ambient circuit
Is the
output of
IC501 pin 12, 13
all correct?
Check the IC501 and
its ambient circuit
17
Page 20
7. Focus
Yes
OK
Check
Focus VR in
FBT
Is
Focus
acceptable?
Monitor remains
unfocused
Trouble in Focus
circuit (FBT)
No
18
Page 21
8. Convergence
Yes
Yes
No
Is
convergence
on the center area
bad?
Is
convergence on the
fringe area bad?
Poor convergence
Adjust static
convergence
Refer to
Adjustment
procedure of
convergence
Adjust D.Y
Location
19
Page 22
9. Abnormal Picture
=1000Vp-p
Yes
Is
changeable the
DC level of the base
of Q571?
Is
changeable the
DC level of pin 2 of
the IC571?
Is the
collector pulse
of Q502 correct?
MODE
VGA
Super VGA
VESA SVGA
XGA
Hf=68KHz
Yes
Refer to Horizontal Output circuit
Yes
NoYes
Check the IC571
and its
ambient circuit
Check the IC201 and
its ambient circuit
Trouble in H.OSC/
Deflection Circuit
Trouble in Horizontal
output circuit
Check the B+ and
anode voltage of CRT.
* Normally anode voltage
of CRT is approximately,
24.5KV
* Scan B+ are as follow :
No
No
No
Abnormal
H.Size
Is the
cathode waveform
of D504
correct?
TP1 Voltage
66Vdc
82Vdc
103Vdc
116Vdc
145Vdc
50-250Vpp
Trouble in L502, IC531
or
their ambient
circuit
9.1 Horizontal Size
* At first, adjust controls in the OSD Menu
20
Page 23
9.2 Vertical Size
Yes
Is the 13Vdc line
voltage is correct?
No
Refer to the P.S.U
Check the IC501 and
its ambient circuit
Abnormal
V.Size
No
Is the output of
IC501 pin 12, 13
all correct?
Yes
Check the IC401 and
its ambient circuit
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Page 24
10. Side-Pincushion Circuit
Yes
No
O.K
Side-Pincushion distortion
is excessive or barrel
Select
the side-pincushion
icon in OSD menu,
and adjust acceptable
position
Yes
No
Check the Q571
and its
ambient circuit
Is the
waveform of Q571
base correct?
Yes
No
Check IC571
or its
ambient circuit
Is the
waveform of IC501
pin 11(EWDRV)
normal?
Check IC501 and its ambient circuit
22
Page 25
11. Power Supply Unit (P.S.U)
No
Switch on
No
Yes
Check the power cord outlet
and diode Bridge D001
No
Yes
No
Yes
Yes
Yes
No
No
A
Trouble P.S.U
Is
power switch
on?
Is
fuse F001
O.K?
Is
surge protector
resistor R002
O.K?
Is
voltage of T001
pin 6 130V (270V)?
Is the
waveform T001 pin 8
correct?
Is
voltage of C101
190V DC?
Is
voltage of IC001
pin9 7V~9V DC
Is
voltage of C102
87V DC?
Replace R002
Trouble in bridge diode
D001 or peripheral
device
Trouble in switching
power transformer T001
Trouble in D101
or T001
No
Trouble in T001
or D103
23
Page 26
No
Trouble in D104,
Q101 or T001
Trouble in T001
or Q102, IC102
Trouble in IC101
or D105, IC102
P.S.U O.K
Yes
No
No
Yes
A
Is
voltage of Q101
collector
30V DC?
Is
voltage
of C115 13V DC?
Is
voltage of
IC101 pin 1
5V DC?
Yes
24
Page 27
OPERATION & ADJUSTMENT
EXITMENUADJUSTSELECT
: Launch OSD(On-Screen Display) Menus
: Select the next function
: Select the previous function
: Increase the value of any selected function
: Decrease the value of any selected function
: Exit OSD Menus & Launch OSD Menus, when no OSD
–+
–
+
MENU
EXIT
Register Value Change
Register Value Change
Register Value Change
Register Value ChangeRegister Value Change
Register Value Change
Register Value Change
Color Select
R G BR G B
OSD OFF
R G B
100%
–+
100%
–+
50%
–+
R G B
50%
–+
R G B
50%
–+
R G B
50%
–+
R G B
R GB
50%
–+
R GB
50%
–+
–+
–+–+
–+–+
–+
–+
–+
MENU
MENUMENU
MENUMENU
MENUMENU
EXITEXIT
Key Process
25
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1. OSD(On-Screen Display) Menu 1
93006550
H : +37.6KHz
V : +72Hz
–+
50%
CONTRAST
–+
50%
BRIGHTNESS
NOYES
DEGAUSS
NOYES
RECALL
COLOR TEMPERATURE
Adjust the contrast of image, the difference
between light and dark areas on the screen.
Range : 0 - 100%
Adjust the brightness of the entire display.
Degauss the display and restore image quality.
Reset the screen to the Factory Preset Display
Settings.
Choose different preset color temperatures or
set your own customized color parameters.
SYSTEM SPEC
Display horizontal & vertical frequency and
polarity.
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2. OSD(On-Screen Display) Menu 2
+–+
–
–+
50%
HORIZONTAL POSITION
–+
50%
HORIZONTAL SIZE
–+
50%
VERTICAL POSITION
–+
50%
VERTICAL SIZE
–+
50%
MOIRE
–+
50%
TILT
Adjust the position of the display horizontally
(left or right).
Adjust the display width (horizontal size).
Adjust the position of the display vertically
(up or down).
Adjust the display height (vertical size).
Eliminate a moire pattern looking like a series
of concentric circles or arcs.
• Image turns to by .
• Image turns to by .
Adjust the rotation when the screen is tilted left
or right. (Optional)
• Image turns to by .
• Image turns to by .
While adjusting moire, the display might look vague, so adjust moire at
best-fitted condition.
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3. OSD(On-Screen Display) Menu 3
50%
–+
50%
–+
50%
–+
+–+–+–+–+
–
Adjust the left and right margins for more
convex or more concave margins.
ƒUImage turns to by .
PINCUSHION
TRAPEZOID
PARALLELOGRAM
–+
50%
SIDE BALANCE
–+
50%
CORNER PINCUSHION
ƒUImage turns to by .
Adjust the trapezoid of the screen by moving
the lines inward or outward.
ƒUImage turns to by .
ƒUImage turns to by .
Adjust parallelogram when the screen is
leaning left or right.
ƒUImage turns to by .
ƒUImage turns to by .
Adjust the side Balance when the sides of the
screen are bowed towards left or right.
ƒUImage turns to by .
ƒUImage turns to by .
Adjust the left and right margins of the each
corner.
ƒUImage turns to by .
ƒUImage turns to by .
4. OSD(On-Screen Display) Menu 4
R
–+
50%
RED GAIN
G
–+
50%
GREEN GAIN
B
–+
50%
BLUE GAIN
Adjust the red gain.
Adjust the green gain.
Adjust the blue gain.
28
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BLOCK DIAGRAM
29
Page 32
PCB LAYOUT
Main PCB Solder Side
30
Page 33
Video PCB Solder Side
31
Page 34
Main PCB Component Side
32
Page 35
Video PCB Component Side
33
Page 36
SCHEMATIC DIAGRAM
343536
Page 37
Page 38
Page 39
37
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EXPLODED VIEW DIAGRAM
38
Page 41
REPLACEMENT PARTS LIST
Important Safety Notice
Components identified with the International Symbol have special characteristics important for safety.
When replacing any components, use only manufacturer's specified parts.
Abbreviation of Description
RESISTOR Description
Allowance
F¡ 1%
J¡ 5%
K¡ 10%
M¡ 20%
G¡ 2%
Example:
Fig &
Index
R101
CAP ACIT OR Description
Allowance
C¡ 0.25pF
D¡ 0.5%
F¡ 1pF
J¡ 5%
K¡ 10%
P¡ 100% ~ 0%
Z¡ 80% ~ -
Example:
Fig &
Index
C102CCXF1H104ZCeramic 50V Z
C105CBSLH200JCeramic 50V J
C402CCXB1H331KCeramic 50V K
Part NoDescription
Resistors
RE-4Z820JCabron : 82J
Part NoDescription
Capacitors
39
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!!!!!
PART LIST
!
The components identified by mark have special characteristics important for safety and x-ray radiation.
These should be replaced only with the types specified in the parts list.
DZ130DDZ12BM---DIODE ZENERDZ12BM
DZ210DDZ5R1B---DIODE ZENERDZ-5.1B
DZ21 1DDZ5R1B---DIODE ZENERDZ-5.1B
DZ213DDZ5R1B---DIODE ZENERDZ-5.1B
DZ214DDZ5R1B---DIODE ZENERDZ-5.1B
DZ621DDZ12BM---DIODE ZENERDZ12BM
DZ622DDZ12BM---DIODE ZENERDZ12BM
D007DZN4148---DIODE1N4148 AUTO 52MM
D106DZN4148---DIODE1N4148 AUTO 52MM
D1 11DZN4148---DIODE1N4148 AUTO 52MM
D1 12DZN4148---DIODE1N4148 AUTO 52MM
D130DZN4148---DIODE1N4148 AUTO 52MM
D205DZN4148---DIODE1N4148 AUTO 52MM
D206DZN4148---DIODE1N4148 AUTO 52MM
D450DZN4148---DIODE1N4148 AUTO 52MM
D512DZN4148---DIODE1N4148 AUTO 52MM
D521DZN4148---DIODE1N4148 AUTO 52MM
D580DZN4148---DIODE1N4148 AUTO 52MM
D621DZN4148---DIODE1N4148 AUTO 52MM
D622DZN4148---DIODE1N4148 AUTO 52MM
D680DZN4148---DIODE1N4148 AUTO 52MM
E14856310200EYE LETBSR T0.2 (R2.0)
E104856310200EYE LETBSR T0.2 (R2.0)
E1 14856310200EYE LETBSR T0.2 (R2.0)
E124856310200EYE LETBSR T0.2 (R2.0)
E134856310300EYE LETBSR T0.2 (R1.6)
E144856310300EYE LETBSR T0.2 (R1.6)
E154856310300EYE LETBSR T0.2 (R1.6)
E164856310300EYE LETBSR T0.2 (R1.6)
E174856310300EYE LETBSR T0.2 (R1.6)
E184856310300EYE LETBSR T0.2 (R1.6)
E194856310300EYE LETBSR T0.2 (R1.6)
E24856310200EYE LETBSR T0.2 (R2.0)
E204856310300EYE LETBSR T0.2 (R1.6)
E34856310200EYE LETBSR T0.2 (R2.0)
E44856310200EYE LETBSR T0.2 (R2.0)
E54856310200EYE LETBSR T0.2 (R2.0)
E64856310200EYE LETBSR T0.2 (R2.0)
E74856310300EYE LETBSR T0.2 (R1.6)
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LOCPART-CODEPART-NAMEPART-DESC
E84856310300EYE LETBSR T0.2 (R1.6)
E94856310200EYE LETBSR T0.2 (R2.0)
J00185801052GYWIRE COPPER1/0.52 TIN COATING
J00285801052GYWIRE COPPER1/0.52 TIN COATING
J00385801052GYWIRE COPPER1/0.52 TIN COATING
J00485801052GYWIRE COPPER1/0.52 TIN COATING
J10185801052GYWIRE COPPER1/0.52 TIN COATING
J10285801052GYWIRE COPPER1/0.52 TIN COATING
J10385801052GYWIRE COPPER1/0.52 TIN COATING
J10485801052GYWIRE COPPER1/0.52 TIN COATING
J10585801052GYWIRE COPPER1/0.52 TIN COATING
J10685801052GYWIRE COPPER1/0.52 TIN COATING
J10785801052GYWIRE COPPER1/0.52 TIN COATING
J10885801052GYWIRE COPPER1/0.52 TIN COATING
J10985801052GYWIRE COPPER1/0.52 TIN COATING
J1 1185801052GYWIRE COPPER1/0.52 TIN COATING
J1 1285801052GYWIRE COPPER1/0.52 TIN COATING
J1 1385801052GYWIRE COPPER1/0.52 TIN COATING
J1 1485801052GYWIRE COPPER1/0.52 TIN COATING
J1 1585801052GYWIRE COPPER1/0.52 TIN COATING
J1 1685801052GYWIRE COPPER1/0.52 TIN COATING
J1 1785801052GYWIRE COPPER1/0.52 TIN COATING
J1 1885801052GYWIRE COPPER1/0.52 TIN COATING
J1 1985801052GYWIRE COPPER1/0.52 TIN COATING
J12085801052GYWIRE COPPER1/0.52 TIN COATING
J12185801052GYWIRE COPPER1/0.52 TIN COATING
J12285801052GYWIRE COPPER1/0.52 TIN COATING
J12385801052GYWIRE COPPER1/0.52 TIN COATING
J12485801052GYWIRE COPPER1/0.52 TIN COATING
J12585801052GYWIRE COPPER1/0.52 TIN COATING
J12685801052GYWIRE COPPER1/0.52 TIN COATING
J12785801052GYWIRE COPPER1/0.52 TIN COATING
J12885801052GYWIRE COPPER1/0.52 TIN COATING
J12985801052GYWIRE COPPER1/0.52 TIN COATING
J13085801052GYWIRE COPPER1/0.52 TIN COATING
J13185801052GYWIRE COPPER1/0.52 TIN COATING
J13285801052GYWIRE COPPER1/0.52 TIN COATING
J13385801052GYWIRE COPPER1/0.52 TIN COATING
J13485801052GYWIRE COPPER1/0.52 TIN COATING
51
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LOCPART-CODEPART-NAMEPART-DESC
J13585801052GYWIRE COPPER1/0.52 TIN COATING
J13685801052GYWIRE COPPER1/0.52 TIN COATING
J13785801052GYWIRE COPPER1/0.52 TIN COATING
J13885801052GYWIRE COPPER1/0.52 TIN COATING
J13985801052GYWIRE COPPER1/0.52 TIN COATING
J14085801052GYWIRE COPPER1/0.52 TIN COATING
J14185801052GYWIRE COPPER1/0.52 TIN COATING
J14285801052GYWIRE COPPER1/0.52 TIN COATING
J14385801052GYWIRE COPPER1/0.52 TIN COATING
J14485801052GYWIRE COPPER1/0.52 TIN COATING
J14585801052GYWIRE COPPER1/0.52 TIN COATING
J14685801052GYWIRE COPPER1/0.52 TIN COATING
J14785801052GYWIRE COPPER1/0.52 TIN COATING
J14885801052GYWIRE COPPER1/0.52 TIN COATING
J14985801052GYWIRE COPPER1/0.52 TIN COATING
J15085801052GYWIRE COPPER1/0.52 TIN COATING
J15185801052GYWIRE COPPER1/0.52 TIN COATING
J15285801052GYWIRE COPPER1/0.52 TIN COATING
J15385801052GYWIRE COPPER1/0.52 TIN COATING
J15485801052GYWIRE COPPER1/0.52 TIN COATING
J15585801052GYWIRE COPPER1/0.52 TIN COATING
J15685801052GYWIRE COPPER1/0.52 TIN COATING
J15785801052GYWIRE COPPER1/0.52 TIN COATING
J15885801052GYWIRE COPPER1/0.52 TIN COATING
J15985801052GYWIRE COPPER1/0.52 TIN COATING
J16085801052GYWIRE COPPER1/0.52 TIN COATING
J16185801052GYWIRE COPPER1/0.52 TIN COATING
J16285801052GYWIRE COPPER1/0.52 TIN COATING
J16385801052GYWIRE COPPER1/0.52 TIN COATING
J16485801052GYWIRE COPPER1/0.52 TIN COATING
J16585801052GYWIRE COPPER1/0.52 TIN COATING
J16685801052GYWIRE COPPER1/0.52 TIN COATING
J16785801052GYWIRE COPPER1/0.52 TIN COATING
J16885801052GYWIRE COPPER1/0.52 TIN COATING
J16985801052GYWIRE COPPER1/0.52 TIN COATING
J17085801052GYWIRE COPPER1/0.52 TIN COATING
J17185801052GYWIRE COPPER1/0.52 TIN COATING
J17285801052GYWIRE COPPER1/0.52 TIN COATING
J17385801052GYWIRE COPPER1/0.52 TIN COATING
52
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LOCPART-CODEPART-NAMEPART-DESC
J17485801052GYWIRE COPPER1/0.52 TIN COATING
J17585801052GYWIRE COPPER1/0.52 TIN COATING
J17685801052GYWIRE COPPER1/0.52 TIN COATING
J17785801052GYWIRE COPPER1/0.52 TIN COATING
J17885801052GYWIRE COPPER1/0.52 TIN COATING
J17985801052GYWIRE COPPER1/0.52 TIN COATING
J18085801052GYWIRE COPPER1/0.52 TIN COATING
J18185801052GYWIRE COPPER1/0.52 TIN COATING
J18285801052GYWIRE COPPER1/0.52 TIN COATING
J18485801052GYWIRE COPPER1/0.52 TIN COATING
J18585801052GYWIRE COPPER1/0.52 TIN COATING
J18685801052GYWIRE COPPER1/0.52 TIN COATING
J18785801052GYWIRE COPPER1/0.52 TIN COATING
J18885801052GYWIRE COPPER1/0.52 TIN COATING
J18985801052GYWIRE COPPER1/0.52 TIN COATING
J19085801052GYWIRE COPPER1/0.52 TIN COATING
J19185801052GYWIRE COPPER1/0.52 TIN COATING
J19285801052GYWIRE COPPER1/0.52 TIN COATING
J19385801052GYWIRE COPPER1/0.52 TIN COATING
J19485801052GYWIRE COPPER1/0.52 TIN COATING
J19585801052GYWIRE COPPER1/0.52 TIN COATING
J19685801052GYWIRE COPPER1/0.52 TIN COATING
J19785801052GYWIRE COPPER1/0.52 TIN COATING
J19885801052GYWIRE COPPER1/0.52 TIN COATING
J19985801052GYWIRE COPPER1/0.52 TIN COATING
J20085801052GYWIRE COPPER1/0.52 TIN COATING
J20185801052GYWIRE COPPER1/0.52 TIN COATING
J20285801052GYWIRE COPPER1/0.52 TIN COATING
J20385801052GYWIRE COPPER1/0.52 TIN COATING
J20485801052GYWIRE COPPER1/0.52 TIN COATING
J20585801052GYWIRE COPPER1/0.52 TIN COATING
J20685801052GYWIRE COPPER1/0.52 TIN COATING
J20885801052GYWIRE COPPER1/0.52 TIN COATING
J20985801052GYWIRE COPPER1/0.52 TIN COATING
J21085801052GYWIRE COPPER1/0.52 TIN COATING
J21 185801052GYWIRE COPPER1/0.52 TIN COATING
J21285801052GYWIRE COPPER1/0.52 TIN COATING
J21385801052GYWIRE COPPER1/0.52 TIN COATING
J21485801052GYWIRE COPPER1/0.52 TIN COATING
53
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LOCPART-CODEPART-NAMEPART-DESC
J21585801052GYWIRE COPPER1/0.52 TIN COATING
J21685801052GYWIRE COPPER1/0.52 TIN COATING
J21785801052GYWIRE COPPER1/0.52 TIN COATING
J21985801052GYWIRE COPPER1/0.52 TIN COATING
J22085801052GYWIRE COPPER1/0.52 TIN COATING
J22185801052GYWIRE COPPER1/0.52 TIN COATING
J22285801052GYWIRE COPPER1/0.52 TIN COATING
J22385801052GYWIRE COPPER1/0.52 TIN COATING
J22585801052GYWIRE COPPER1/0.52 TIN COATING
J22685801052GYWIRE COPPER1/0.52 TIN COATING
J22785801052GYWIRE COPPER1/0.52 TIN COATING
J22885801052GYWIRE COPPER1/0.52 TIN COATING
J22985801052GYWIRE COPPER1/0.52 TIN COATING
J23085801052GYWIRE COPPER1/0.52 TIN COATING
J23185801052GYWIRE COPPER1/0.52 TIN COATING
J23285801052GYWIRE COPPER1/0.52 TIN COATING
J23485801052GYWIRE COPPER1/0.52 TIN COATING
J23585801052GYWIRE COPPER1/0.52 TIN COATING
J23685801052GYWIRE COPPER1/0.52 TIN COATING
R001RD-2Z105J-R CARBON FILM1/2 1M OHM J
R002RD-2Z154J-R CARBON FILM1/2 150K OHM J
R010RD-AZ332J-R CARBON FILM1/6 3.3K OHM J
R101RD-2Z154J-R CARBON FILM1/2 150K OHM J
R105RD-4Z203J-R CARBON FILM1/4 20K OHM J
R107RD-4Z911J-R CARBON FILM1/4 910 OHM J
R109RD-AZ472J-R CARBON FILM1/6 4.7K OHM J
R1 10RD-AZ241J-R CARBON FILM1/6 240 OHM J
R1 12RN-AZ8871FR METAL FILM1/6 8.87K OHM F
R1 13RN-AZ2051FR METAL FILM1/6 2.05K OHM F
R1 15RS01Z209JSR M-OXIDE FILM1W 2 OHM J SMALL
R1 17RD-AZ472J-R CARBON FILM1/6 4.7K OHM J
R1 19RD-AZ472J-R CARBON FILM1/6 4.7K OHM J
R120RD-AZ272J-R CARBON FILM1/6 2.7K OHM J
R124RS01Z820JSR M-OXIDE FILM1W 82 OHM J SMALL
R133RD-AZ302J-R CARBON FILM1/6 3K OHM J
R136RD-AZ124J-R CARBON FILM1/6 120K OHM J
R137RD-AZ103J-R CARBON FILM1/6 10K OHM J
R150RD-AZ102J-R CARBON FILM1/6 1K OHM J
R151RD-AZ154J-R CARBON FILM1/6 150K OHM J
000309978212800BAG POL YP.E FILM T0.03*900*900
000409978212900BAG POL YPE FILM T0.05*250*350
000502TP00075CLTAPE OPP50X75 CLEAR
000609975822500LABEL BARCODE80*22 ART P APER
000659978213700BAG CARGOLIGHT 1000*1850
0007099729205A3BASE STAND ASHIPS GY-275A
000109972920503BASE ST ANDHIPS GY-275A
000102221 110233RESIN PSLG HIPS 55WC GY-275A
000209972920403SWIVEL T ABLEHIPS GY-275A
000102221 110233RESIN PSLG HIPS 55WC GY-275A
00030997271 1100FOOTRUBBER(WHT) 14
000409978212601BAG POL YPE FILM T0.05*375*360
000502TU08024CLT APE VINYL0.08TX24MM CLEAR