Micron Electronics CPD-2401 Service Manual
SPECIFICATIONS
D99
CHASSIS
SERVICE MANUAL
CPD-2401
CPD-2401
US Model
Canadian Model
Chassis No. L29N-A
COLOR MONITOR
Picture tube
Video image area
Resolution
Standard image area
Input signal
Video
Sync
0.24-0.25 mm aperture grill pitch
17 inches measured diagonally
90-degree deflection
(16" maximum viewing image)
Approx. 326 X 243 mm (w/h)
(12
7/8
x 9
5/8
inches)
Horizontal: Max. 1280 dots
Vertical: Max. 1024 lines
Approx. 312 x 234 mm (w/h)
(12
1/4
x 9
1/4
inches)
Analog RGB (75 ohms typical)
0.7 Vp-p,
±
5%, Positive
Separate HD/VD,
TTL Polarity Free
External Composite,
TTL Polarity Free (2K ohms impedance)
Power Consumption
Deflection frequency
AC input voltage / current
Dimensions
Mass
Maximum 120W
Minimum 95W
Horizontal: 30 to 85 KHz
Vertical: 48 to 120 Hz
100 to 120 V, 50/60 Hz, 1.7A
220 to 240V, 50/60Hz, 0.9A
404 x 414 x 420mm (w/h/d)
(15
15/16
x 16
3/8
x 16
1/2
inches)
Approx. 18.8 kg (41 lbs. 7 oz.)
Design and specifications are subject to change without notice.
CPD-2401
POWER MANAGEMENT
The power saving mode complies with the VESA Display Power Management Signaling standard. Each
state of power management shall be activated by the host computer terminating the appropriate sync
signals. Blanking the video must precede termination of the sync signals. The elapsed time counter
shall also be controlled by the host computer. Reactivation of the monitor shall be accomplished from
the host computer by re-establishing the normal sync signal.
Power consumption Screen Horizontal Vertical Power Recovery time indicator
mode (video) sync signal sync signal consumption
1 Normal operation active yes yes < 120 W -- Green
2 Standby (1st mode) blank no yes < 15 W Approx. 3 sec. Green and Orange
Alternate
3 Suspend (2nd mode) blank yes no < 15 W Approx. 3 sec. Green and Orange
Alternate
4 Active-off (3rd mode) blank no no < 3 W Approx. 10 sec. Orange
5 Power-off -- -- -- 0 W -- Off
SELF DIAGNOSIS FUNCTION
When a failure occurs, the STANDBY/TIMER lamp will flash a set number of times to indicate the
possible cause of the problem. If there is more than one error, the lamp will identify the first of the
problem areas.
Status Area of Failure LED Indication
1 Failure 1 HV or +B Amber (0.5 second)/Off (0.5 second)
2 Failure 2 Amber (1.5 second)/Off (0.5 second)
H Stop or V Stop
3 Failure 3 ABL Amber (0.5 second)/Off (1.5 second)
4 Aging/ S elfTest Amber (0.5 second)/Off (0.5 second)/
Green (0.5 second)/Off (0.5 second)
TIMING SPECIFICATION
TIMING SPECIFICATION
Resolution (H x V)
Dot Clock (MHz)
Hor. Freq.(kHz)
Ext (H/V)/Polarity
Ext (CS)/Polarity
MODE 123
640 x 480
HORIZONTAL
H-Total
H-Blanking
H-Front Porch
H-Sync.
H-Back Porch
H-Active
(µsec)
VERTICAL
Ver. Freq. (Hz)
V-Total
V-Blanking
V-Front Porch
V-Sync.
V-Back Porch
V-Active
(lines)
SYNC.
Int (G)
Int/Non Int
25.175
31.469
31.778
6.356
0.636
3.813
1.907
25.422
59.940
525
45
10
33
480
No
Yes -/-
No
Non Int
2
720 x 400
28.322
31.469
31.777
6.355
0.636
3.813
1.907
25.422
70.087
449
400
Yes -/+
Non Int
— 2 —
No
No
49
12
35
2
800 x 600
56.250
53.674
18.631
4.409
0.569
1.138
2.702
14.222
85.061
631
600
Yes +/+
Non Int
31
1
3
27
No
No
Primary Mode
45
1024 x 768
94.500
68.677
14.561
3.725
0.508
1.016
2.201
10.836
84.997
808
40
36
768
No
Yes +/+
No
Non Int
1280 x 1024
135.000
1
3
79.976
12.504
3.022
0.119
1.067
1.837
9.481
75.025
1066
42
1
3
38
1024
No
Yes +/+
No
Non Int
TABLE OF CONTENTS
Section Title Page
Safety Check Out Instructions............................................................... 4
1. GENERAL .................................................................................. 5
2. DISASSEMBLY
2-1. Cabinet Removal............................................................ 9
2-2. Service Position.............................................................. 9
2-3. A and D Board Removal ................................................ 9
2-4. Picture T ube Removal .................................................. 10
3. SAFETY RELATED ADJUSTMENTS ............................ 11
4. ADJUSTMENTS..................................................................... 12
5. DIAGRAMS
5-1. Block Diagram .............................................................. 15
5-2. Circuit Boards Location ................................................ 18
5-3. Schematic Diagrams and Printed Wiring Boards ........ 19
1. A Board - Schematic Diagram ................................ 19
2. D Board - Schematic Diagram................................ 2 3
5-4. Semiconductors............................................................ 29
6. EXPLODED VIEWS
6-1. Chassis......................................................................... 30
6-2. Packing Materials ......................................................... 31
7. ELECTRICAL PARTS LIST ............................................... 33
CPD-2401
SAFETY CHECK-OUT
After correcting the original service problem, perform the
following safety checks before releasing the set to the
customer:
1. Check the area of your repair for unsoldered or poorlysoldered connections. Check the entire board surface
for solder splashes and bridges.
2. Check the interboard wiring to ensure that no wires are
“pinched” or contact high-wattage resistors.
3. Check that all control knobs, shields, covers, ground
straps, and mounting hardware have been replaced. Be
absolutely certain that you have replaced all the
insulators.
4. Look for unauthorized replacement parts, particularly
transistors, that were installed during a previous repair.
Point them out to the customer and recommend their
replacement.
5. Look for parts which, though functioning, show obvious
signs of deterioration. Point them out to the customer
and recommend their replacement.
6. Check the line cords for cracks and abrasion.
Recommend the replacement of any such line cord to
the customer.
7. Check the B+ and HV to see if they are specified values.
Make sure your instruments are accurate; be suspicious
of your HV meter if sets always have low HV .
8. Check the antenna terminals, metal trim, “metallized"
knobs, screws, and all other exposed metal parts for
AC Leakage. Check leakage as described below.
Leakage T est
The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any exposed metal part
having a return to chassis, must not exceed 0.5 mA (500
microampere). Leakage current can be measured by any one of
three methods.
1. A commercial leakage tester, such as the Simpson 229 or
RCA WT -540A. Follow the manufacturers' instructions to use
these instructions.
2. A battery-operated AC milliammeter . The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of
a VOM or battery-operated AC voltmeter. The "limit"
indication is 0.75 V , so analog meters must have an accurate
low voltage scale. The Simpson's 250 and Sanwa SH-63Trd
are examples of passive VOMs that are suitable. Nearly
all battery operated digital multimeters that have a 2V AC
range are suitable. (See Figure A)
WARNING!!
NEVER TURN ON THE POWER IN A CONDITION IN WHICH THE
DEGAUSS COIL HAS BEEN REMOVED.
SAFETY-RELA TED COMPONENT W ARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK ON THE
SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE P ARTS
LIST ARE CRITICAL FOR SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS THAT ARE
CRITICAL FOR SAFE OPERATION ARE IDENTIFIED IN THIS
MANUAL. FOLLOW THESE PROCEDURES WHENEVER CRITICAL
COMPONENTS ARE REPLACED OR IMPROPER OPERA TION IS
SUSPECTED.
To Exposed Metal
Parts on Set
1.5 k
0.15 µF
Ω
Earth Ground
Figure A
AC
Voltmeter
(0.75 V)
AVERTISSEMENT!!
NE JAMAIS METTRE SOUS TENSION QUAND LA BOBINE DE
DEMAGNETISATION EST ENLEVEE.
ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!
LES COMPOSANTS IDENTIFIES PAR UNE TRAME ET PAR UNE
MARQUE SUR LES SCHEMAS DE PRINCIPE, LES VUES
EXPLOSEES ET LES LISTES DE PIECES SONT D'UNE
IMPORTANCE CRITIQUE POUR LA SECURITE DU
FONCTIONNEMENT. NE LES REMPLACER QUE PAR DES
COMPOSANTS SONY DONT LE NUMERO DE PIECE EST
INDIQUE DANS LE PRESENT MANUEL OU DANS DES
SUPPLEMENTS PUBLIES PAR SONY. LES REGLAGES DE
CIRCUIT DONT L'IMPORTANCE EST CRITIQUE POUR LA
SECURITE DU FONCTIONNEMENT SONT IDENTIFIES DANS LE
PRESENT MANUEL. SUIVRE CES PROCEDURES LORS DE
CHAQUE REMPLACEMENT DE COMPOSANTS CRITIQUES, OU
LORSQU'UN MAUVAIS FONTIONNEMENT SUSPECTE.
— 4 —
CPD-2401
4
Getting Started
Setup
Connect the monitor to your computer system.
This monitor will sync to platforms running at horizontal frequencies between 30 and 85 kHz.
Step 1
Make sure the computer s ys tem is switched off and a t tach
the video signal cable to the video output of the computer.
Step 2
Make sure the computer is switched off and attach the
power cord to the monitor. Then, attach the other end of
the power cord to a power outlet.
Step 3
Switch on the monitor and computer.
Step 4
Adjust the user controls according to your personal
preference.
Installation is complete.
Parts and Controls
1
(RESET) button (pages 6, 9)
This button resets the adjustments to the factory settings.
2
(BRIGHTNESS) (
v/V
) buttons (page 5)
These buttons adjust the picture brightness and function as the
(
v/V
) buttons when adjusting other items.
3
(MENU) button (page 6)
This button displays the MENU OSD.
4 6
(CONTRAST) (
B/b
) buttons (page 5)
These buttons adjust the contrast and function as the (
B/b
)
buttons when adjusting other items.
5 1
(POWER) switch and indicator
This button turns the monitor on and off.
The indicator lights up green when the monitor i s on, and lig hts
up green and orange when the monitor is in Power Saving
mode.
6
AC IN connector
This connector provides AC pow e r to the monitor.
7
Video input connector (HD15) (page 5)
This connector inputs RGB video signals and SYNC signals.
Computer
to the video output
to a power outlet
Power cord
Front
Rear
5
Getting Started
Customizing Your Monitor
US
This monitor can be adjusted within the angles shown below. To
turn the monitor vertically or horizontally, hold it at the bottom with
both hands.
1
Press the (BRIGHTNESS)
v/V
or 6 (CONTRAST)
B/b
buttons.
The BRIGHTNESS/CONTRAST OSD appears.
2
To adjust the brightness.
Press the (BRIGHTNESS)
v/V
buttons.
To adjust the contrast.
Press the 6 (CONTRAST)
B/b
buttons.
Use of the Tilt/Swivel
Video Connector
Pin No. Signal Pin No. Signal
1 Red video 8 Blue return
2 Green video 9 Not used (no pin)
3 Blue video 10 Ground
4 Ground 11 Ground
5 CPU host ground 12 SDA (serial data)
6 Red ground 13 Horiz ontal Sync
7 Green return 14 Vertical Sync
15 SCL (serial clock)
90°
5°
90°
15°
1234
5
987
10
11 12 13 14 15
6
Adjusting the Picture Brightness
and Contrast
BRIGHTNESS/CONTRAST
26 26
SECTION 1
GENERAL
The following are partial abstracts from the Operating Instruction
Manual. The page numbers shown reflect those of the Operating
Instruction Manual.
CPD-2401
7
Customizing Your Monitor
US
1
Adjusting the size and centering
of the picture (SIZE/CENTER)
This setting is stored in memory for the current input signal.
1
Press the MENU button.
The main MENU appears on the screen.
2
Press the
v/V
buttons to highlight SIZE/
CENTER and press the MENU button again.
The SIZE/CENTER menu appears on the screen.
3
Press the
v/V
buttons to select the desired
adjustment item. Then press the 6
B/b
buttons to
adjust the setting.
The OSD automatically disappears after about 30 seconds. To
close the OSD, press the MENU button again.
Note
Adjustment stops when either the horizontal or vertic al size reaches its
maximum or minimum valu e.
2
Adjusting the shape of the
picture (GEOMETRY)
The GEOMETRY settings allow you to adjust the rotation and
shape of the picture.
The rotation setting is stored in memory for all input signals. All
other settings are stored in memory for the current input signal.
1
Press the MENU button.
The main MENU appears on the screen.
2
Press the
v/V
buttons to highlight GEOMETRY
and press the MENU button again.
The GEOMETRY menu appears on the screen.
3
First press the
v/V
buttons to select the desired
adjustment item. Then press the 6
B/b
buttons to
adjust the setting.
The OSD automatically disappears after about 30 seconds. To
close the OSD, press the MENU button again.
3
Adjusting the color of the picture
(COLOR)
The COLOR settings allow you to adjust the picture’s color
temperature by changing the color level of the white color field.
Colors appear reddish if the temperature is low, and bluish if the
temperature is high. This adjustment is useful for matching the
monitor’s colors to a printed picture’s colors.
This setting is stored in memory for all input signals.
1
Press the MENU button.
The main MENU appears on the screen.
2
Press the
v/V
buttons to highlight COLOR and
press the MENU button again.
The COLOR menu appears on the screen.
3
Press the
v/V
buttons to select a color
temperature.
The preset color temperatures are 9300K and 5000K. Since the
default setting is 9300K, the whi tes chan ge from a bluish hu e to
a reddish hue as the temperature is l owered to 5000K.
You can also fine tune the color temperature by selecting in
step 2 above, and using the 6
B/b
buttons to adjust the color
temperature manually.
This OSD allows you to adjust the color temperature between
9300K and 5000K.
Press the 6
B/b
buttons to adjust the color temperature.
The OSD automatically disappears after about 30 seconds. To
close the OSD, press the MENU button again.
Adjusting the Settings
Select To
HORIZONTAL CENTERING
shift the picture to the left or
right
VERTICAL CENTERING
shift the picture up or down
HORIZONTAL SIZING
enlarge or reduce the picture
width
VERTICAL SIZING
enlarge or reduce the picture
height
ZOOM
enlarge or reduce the picture
width and height
proportionally
Select To
ROTATION
rotate the picture
PINCUSHION
expand or contract the picture sides
PIN BALANCE
shift the picture sides to the left or right
KEYSTONE
adjust the picture width at the top of the
screen
KEY BALANCE
shift the picture to the left or right at the
top of the screen
COLOR
9300K
5000K
26
6
Customizing Your Monitor
The OSD (On-screen Display) System
You can adjust most of the monitor’s settings using the OSDs (Onscreen Display). All of the OSDs in this illustration are described on
the following pages in order. You can access any of these OSDs
from the MENU OSD. To adjust monitor settings using the OSDs,
follow the steps below:
Basic controls:
• Use the (MENU) button to display the MENU OSD and to
select menu items.
• Use the (BRIGHTNESS)
v/V
buttons to highlight menu
items and to adjust settings.
To adjust the monitor settings:
1
Press the MENU button to display the MENU OSD.
2
Highlight the desired OSD using the BRIGHTNES S buttons an d
press the MENU button again.
3
If necessary, use the BRIGHTNESS buttons to select a specific
item.
4
Adjust the monitor setting using the BRIGHTNESS and
CONTRAST buttons.
• To reset the current item to its original setting, press the
(RESET) button while the item’s adjustment OSD is displayed.
5
When you finish adjusting the setting, press the MENU button to
return to the MENU OSD.
Press the MENU button twice to return to normal viewing.
• Resetting: If you press the RESET button while an OSD is
displayed, only the current adjustment item is reset. For
additional information on using the reset function, see the
“Resetting the Adjustments” section on page 9.
• Each of the adjustment’s OSD automatically disappears after
30 seconds.
Introducing the OSD System
OK
MENU
MENU
EXIT
SIZE/CENTER
GEOMETRY
COLOR
CONVERGENCE
LANGUAGE
OPTION
HELP
80.0kHz/ 75Hz
1280 X 1024
1
2
3
4
5
6
7
Horizontal/Vertical
frequencies for
current input signal
Resolution for current
input signal
1
SIZE/CENTER
2
GEOMETRY
3
COLOR
4
CONVERGENCE
5
LANGUAGE
6
OPTION
7
HELP
SIZE/CENTER
26
26
GEOMETRY
COLOR
9300K
5000K
26
CONVERGENCE
LANGUAGE
ENGLISH
FRANÇAIS
DEUTSCH
ESPAÑOL
ITALIANO
NEDERLANDS
SVENSKA
ON
DEGAUSS
OPTION
HELP
RETURN TO MAIN MENU
RECOMMENDED RESOLUTION
FLICKER
THIN HORIZONTAL LINE
DISTORTED SHAPE
OUT OF FOCUS
DISCOLORATION
8
Customizing Your Monitor
4
Adjusting the quality of the
picture (CONVERGENCE)
The CONVERGENCE settings allow you to adjust the quality of
the picture by eliminating red or blue shadows around letters,
characters and lines.
Both settings are stored in memory for all input signals.
1
Press the MENU button.
The main MENU appears on the screen.
2
Press the
v/V
buttons to highlight
CONVERGENCE and press the MENU button again.
The CONVERGENCE menu appears on the screen.
3
Press the 6
B/b
buttons to adjust the horizontal
convergence, or the
v/V
buttons to adjust the
vertical convergence.
The OSD automatically disappears after about 30 seconds. To
close the OSD, press the MENU button again.
5
Changing the OSD language
(LANGUAGE)
This setting is stored in memory for the current input signal.
1
Press the MENU button.
The main MENU appears on the screen.
2
Press the
v/V
buttons to highlight LANGUAGE
and press the MENU button again.
The LANGUAGE menu appears on the screen.
3
Press the
v/V
buttons to select the language you
prefer.
The OSD automatically disappears after about 30 seconds. To
close the OSD, press the MENU button again.
6
Additional settings (OPTION)
You can manually degauss (demagnetize) the screen, cancel the
moire, adjust the OSD horizontal position, adjust the OSD vertical
position and lock the controls using the OPTION OSD.
1
Press the MENU button.
The main MENU appears on the screen.
2
Press the
v/V
buttons to highlight OPTION and
press the MENU button again.
The OPTION menu appears on the screen.
3
Press the
v/V
buttons to highlight the desired
adjustment item.
Adjust the selected item according to the following instructions.
The OSD automatically disappears after about 30 seconds. To
close the OSD, press the MENU button again.
Degaussing the monitor
The monitor is automatically degaussed (demagnetized) when the
power is turned on.
To manually degauss the monitor, first press the
v/V
buttons to highlight (M ANUAL DEGAUSS).
Then press only the right 6 b button.
The monitor is degaussed for about three seconds. If a second
degauss cycle is needed, allow a minimum interval of 20
minutes for the best result.
Adjusting the amount of the moire cancellation
To adjust the amount of moire cancellation, first press
the
v/V
buttons to highlight ( MOIRE
CANCEL). Then press the
6 B/b
buttons to adjust the
amount of moire cancellation until the moire effect is
at a minimum.
* Moire is a type of natural interference which produces soft, wavy lines on
your screen. It may appear due to interference between the pattern of the
picture on the screen and the phosphor pitch pattern of the monitor.
Adjusting the OSD Horizontal Position
To change the horizontal position of the OSD, first
press the
v/V
buttons to highlight (OSD H
POSITION). Then press the
6 B/b
buttons to adjust
the horizontal position of the OSD.
Adjusting the OSD Vertical Position
To change the vertical position of the OSD, first press
the
v/V
buttons to highlight (OSD V
POSITION). Then press the
6 B/b
buttons to adjust
the vertical position of the OSD.
Locking the controls
To protect adjustment data by locking the controls,
first press
v/V
buttons to highlight
(CONTROL LOCK). Then press the
6 B/b
buttons to
toggle the Control Lock on or off.
Only the 1 (power) switch and MENU button will operate.
Example of moire
OSD H
POSITION
OPTION
26
OSD V
POSITION
OPTION
26
9
Customizing Your Monitor
US
7
Using the HELP OSD
1
Press the MENU button.
The main MENU appears on the screen.
2
Press the
v/V
buttons to highlight HELP and
press the MENU button again.
The HELP OSD appears on the screen.
3
Press the
v/V
to select an option from the HELP
menu, then press the MENU button to view the HELP
information.
Resetting the adjustments
Navigate through the on-screen menus to select the adjustment item
you want to reset, and press the RESET button before the OSD
disappears.
Press the RESET button when no OSD is displaye d on the screen.
Note that the following items are not reset by this method:
• on-screen menu language (page 8)
• on-screen menu position (page 8)
Press and hold the reset button for more than two seconds. This
resets everything to the factory presets including the input selection.
Note
The RESET button does not function when
(CONTROL LOCK) is
set to ON.
HELP
RETURN TO MAIN MENU
RECOMMENDED RESOLUTION
FLICKER
THIN HORIZONTAL LINE
DISTORTED SHAPE
OUT OF FOCUS
DISCOLORATION
Resetting a specific adjustment
Resetting all of the adjustments
for the current input signal
Resetting all of the adjustment
data to the factory presets
12
Additional Information
US
* If a second degauss cycle is needed, allow a minimum interval of 20 minutes for the best result. A humming noise may be heard, but this is not a malfunction.
Picture is fuzzy
• Adjust the brightness and contrast (page 5).
• Degauss the monitor* (page 8).
• If CANCEL MOIRE is ON, the picture may become fuzzy. Decrease the moire cancellation
effect (page 8) or set CANCEL MOIRE to OFF.
Picture is ghosting
• Eliminate the use of video cable extensions and/or video swi tch boxes.
• Check that all plugs are firmly seated in their sockets.
Picture is not centered or sized
properly
• Adjust the size (page 7) or centering (page 7). Note that some video modes do not fill the
screen to the edges.
Edges of the image ar e curved
• Adjust the geometry (page 7).
Wavy or elliptical pattern (moire) is
visible
• Cancel the moire (page 8).
x
Problems caused by the connected computer or other equipment
• Change your desktop pattern.
Color is not uniform
• Degauss the monitor* (page 8). If you place equipment that generates a magnetic field, such
as a speaker, near the monitor, or if you change the direction the monitor faces, color may
lose uniformity.
White does not look white
• Adjust the color temperature (page 7).
Letters and lines show red or blue
shadows at the edges
• Adjust the convergence (page 8).
Monitor buttons do not operate
• If the control lock is set to ON, set it to OFF (page 8).
A hum is heard right after the
power is turned on
• This is the normal sound of the auto-degauss cycle. When the power is turned on, the monitor
is automatically degaussed for 3 seconds.
Symptom Check these items
11
Additional Information
Warning Messages
If there is something wrong with the input signal, one of the following messages appears.
To solve these problems, see the “Troubleshooting” section below.
Troubleshooting
If the problem is caused by the connected computer or other equipment, please refer to the connected equipment’s instruction manual.
1
Out of Scan Range
This message indicates that the current input signal is not appropriate for the monitor’s specificatons.
2
Power Save Mode
This message indicates that the monitor has reduced power consumption.
3
Check Signal Cable (self test pattern)
This message indicates that either no input signal is received, or the video cable is not connected.
Symptom Check these items
No picture
If the 1 (power) indicator is not lit • Check that the power cord is properly connected.
• Check that the 1 (power) switch is in the “on” position.
If the CHECK SIGNAL CABLE
message appears on the screen, or if
the 1 (power) indicator is either
orange or alternating between green
and orange
• Check that the vi deo signal cable is properly connected and all plugs are firmly seated in
their sockets.
• Check that the HD15 video input cable’s pins are not bent or pushed in.
x
Problems caused by the connected computer or other equipment
• The comput er is in power saving mode. Try pressing any key on the computer keyboard.
• Check that the computer’s power is “on.”
• Check that the graphic video board is completely seated in the proper bus slot.
If the OUT OF SCAN RANGE
message appears on the screen
x
Problems caused by the connected computer or other equipment
• Check that the video frequency range is within that specified for the monitor. If you replaced
an old monitor with this monitor, reconnec t the old monito r and adjust the frequenc y range to
the following:
Horizontal: 30 – 85 kHz
Vertic a l: 48 – 120 H z
Picture flickers, bounces,
oscillates, or is scrambled
• Isolate and eliminate any potential sources of electric or magnetic fields such as other
monitors, laser printers, electric fans, fluorescent lighting and televisions.
• Move the monitor away from power lines or place a magnetic shield near the monitor.
• Try plugging the monitor into a different AC outlet, preferably on a dif fe re n t circuit .
• Try turning the monitor 90° to the left or right.
x
Problems caused by the connected computer or other equipment
• Check your graphic video board manual for the proper monitor setting.
• Confirm that the graphics mode (VESA, VGA, etc.) and the frequency of the input signal are
supported by this monitor (Appendix). Even if the frequency is within the proper range,
some graphic video boards may have a sync pulse that is too narrow for the monitor to sync
correctly.
• Adjust the computer’s refresh rate (vertical frequency) to obtain the best possible picture.
INFORMATION
MONITOR IS WORKING
OUT OF SCAN RANGE
CHANGE PC SETTING
INFORMATION
MONITOR IS IN
POWER SAVE MODE
ACTIVATE USING PC
INFORMATION
MONITOR IS WORKING
CHECK SIGNAL CABLE
RED
GREEN
BLUE
WHITE
SECTION 2
EMI Shield
Cable stopper
Five screws
(BVTP 3 x 12)
D board
One screw
(BVTT 4 x 8)
Holder
A board
Chassis base
DISASSEMBLY
CPD-2401
2-1. CABINET REMOVAL
2-2. SERVICE POSITION
Two claws
PUSH
Cabinet
PUSH
Two screws
(BVTP 4 x 16)
2-3. A and D BOARD REMOVAL
A board
D board
1 When the D-board is
placed in service
position, the Safety Earth
Wire (green and yellow
wire) is disconnected.
2 After service is
completed and the
D-board reinstalled, the
Safety Earth Wire must
be reattached to the
chassis with the proper
screw. This must be
confirmed before any
subsequent procedures
are attempted.
— 9 —
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