Sony CPD-4401 Service Manual
SERVICE MANUAL
CPD-4401
CPD-4401
US Model
Canadian Model
AEP Model
Chassis No. SCC-L30N-A
Picture tube
Video image area
Resolution
Standard image
area
Input signal
Video
Sync
SPECIFICA TIONS
0.24 mm (center) -0.25mm (edge)
aperture grill pitch
19 inches measured diagonally
90-degree deflection
(18" maximum viewing image)
Approx. 364.8 X 273.6 mm (w/h)
3/8
7/8
x 10
x 10
7/8
inches)
1/2
inches)
(14
Horizontal: Max. 1600 dots
Vertical: Max. 1200 lines
Approx. 352 x 264 mm (w/h)
(13
Analog RGB (75 ohms typical)
0.7 Vp-p, Positive
Separate Horizontal and Vertical
TTL level, Positive or Negative
Video Composite (Sync on Green)
0.3 Vp-p
F99
Power Consumption
Maximum
Nominal
Deflection frequency
AC input voltage/current
Dimensions
Mass
CHASSIS
140 W, 478 BTU/h
100 W, 341BTU/h
Horizontal: 30 to 107 KHz (automatic)
Vertical: 48 to120 Hz (automatic)
100 to 120 V, 50/60 Hz,
1.8A (RMS) at 100VAC
220 to 240V, 50/60Hz,
1.0A (RMS) at 240 VAC
449 x 463 x 463 mm (w/h/d)
2/3
1/5
(17
x 18
Approx. 26.0 kg (57 lb 5 oz)
x 18
1/5
inches)
Design and specifications are subject to change without notice.
TRINITRON® COLOR MONITOR
CPD-4401
POWER MANAGEMENT MODES
If you have VESA's DPMS compliance display card or software installed in your PC, the monitor can automatically reduce
its power consumption when not in use. If input from keyboard, mouse, or other input devices is detected, the monitor
will automatically "wake up." The following table shows the power consumption and signaling of this automatic power
saving feature.
SELF DIAGNOSTIC 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.
TIMING SPECIFICA TIONS
— 2 —
1.5 k
Ω
0.15 µF
AC
Voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
SAFETY CHECK-OUT
CPD-4401
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 follows.
LEAKAGE TEST
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 o ne
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 tha t hav e 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 PARTS
LIST ARE CRITICAL FOR SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY P ARTS 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.
Figure A
AVERTISSEMENT!!
NE JAMAIS METTRE SOUS TENSION QUAND LA BOBINE DE
DEMAGNETISA TION EST ENLEVEE.
ATTENTION AUX COMPOSANTS RELA TIFS A LA SECURITE!!
LES COMPOSANTS IDENTIFIES P AR UNE TRAME ET P AR UNE
MARQUE SUR LES SCHEMAS DE PRINCIPE, LES VUES
EXPLOSEES ET LES LISTES DE PIECES SONT D'UNE IMPORT ANCE
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
MAUV AIS FONTIONNEMENT SUSPECTE.
— 3 —
CPD-4401
TABLE OF CONTENTS
Section Title Page
SAFETY CHECK-OUT ............................................................................. 3
1. GENERAL ........................................................................................ 5
2. DISASSEMBLY
2-1. Cabinet/Shield Removal ............................................. 1 0
2-2. Service Position ........................................................... 1 0
2-3. D, A, H and N Board Removal ..................................... 10
2-4. Picture Tube Removal ................................................. 11
3. SAFETY RELATED ADJUSTMENT ................................................ 12
4. ADJUSTMENTS ............................................................................ 13
5. DIAGRAMS
5-1. Block Diagram ............................................................. 1 5
5-2. Circuit Boards Location ............................................... 18
5-3. Schematic Diagrams and Printed Wiring Boards ...... 18
1. D Board - Schematic Diagram .............................. 1 9
2. H Board - Schematic Diagram .............................. 2 5
3. N Board - Schematic Diagram .............................. 2 6
4. A Board - Schematic Diagram ............................... 27
5-4. Semiconductors .......................................................... 3 0
6. EXPLODED VIEWS
6-1-1. Chassis (US/Canada Model) ................................... 3 2
6-1-2. Chassis (AEP Model) ................................................ 3 3
6-2. Packing Materials......................................................... 3 4
7. ELECTRICAL P ARTS LIST............................................................ 35
— 4 —
The instructions given are partial abstracts from
4
Setup
Connect the monitor to your computer system.
This monitor will sync to platforms runningat horizontal
frequencies between 30 and107 kHz.
Step 1 Make sure the computer system is switched off and attach
the video signal cable to the video output of the computer.
Step 2 Make sure thecomputer is switched offand attach the
power cord to the monitor. Then, attach theother end o f
the power cord to a power outlet.
Step 3 Switch onthe monitor and computer.
Step 4 Adjust the user controlsaccordingto your personal
preference.
Installation is c omplete.
Identifying parts and
controls
1 (RESET) button (pages 6, 9)
This button resets theadjustmentsto the factory settings.
2 (AUTOSIZING AND CENTERING) button (page 5)
This button automatically fillsthe screen andadjusts vertical
and horizontal centering.
3 (BRIGHTNESS) (v/V) buttons (page 5)
These buttons adjust the picture brightnessand function as the
(v/V) buttons whenadjusting other items.
4 (MENU) button (page 6)
This button displays the MENU OSD.
5 6 (CONTRAST) (B/b) buttons(page 5)
These buttons adjust the contrast andfunction as the(B/b)
buttons when adjustingother items.
6 1 (POWER) switch and indicator
This button turns the monitor on and off.
The indicator lights up green when the monitoris on, andlights
up green and orange when the monitor is in Power Saving
mode.
7 AC IN connector
This connector provides AC power to the monitor.
8 Video input connector(HD15) (page 5)
This connector inputs RGB video signals and SYNC signals.
Computer
to the videooutput
to a poweroutlet
Power cord
Front
Rear
the Operating Instruction Manual. The page numbers shown reflect those of the Operating Instruction Manual
Precautions
Installation
Do not installthe monitor in the following places:
• on surfaces (rugs, blankets, etc.) or near materials (curtains,
draperies) that may block the ventilation holes
• near heat sources such as radiators or air ducts, or in a place
subject to direct sunlight
— 5 —
• in a place subject to severe temperature changes
• in aplace subject to mechanical vibration or shock
• on an unstablesurface
• near equipment which generates magnetism, such as a
transformer or high voltagepower lines
• near oron an electrically charged metalsurface
Maintenance
• Clean the screen witha soft cloth. If you use a glass cleaning
liquid, do not use any type of cleaner containing an anti-static
solution or similar additive as this may scratch the screen’s
coating.
• Do not rub, touch, or tap the surface of the screen with sharp or
abrasive items such as a ball point pen orscrewdriver. Thistype
of contact may result in a scratched picture tube.
• Clean the cabinet,panel and controlswith a softcloth lightly
moistened with a mild detergent solution. Donot use anytype of
abrasive pad, scouring powder orsolvent, such as alcoholor
benzene.
Transportation
When you transportthis monitor for repair or shipment, use the
original carton and packingmaterials.
Warning on Power Connection
• Use the supplied powercord. If you use a different power cord,
be sure thatit is compatiblewith your localpower supply.
For the customers in theUS
If you do not use the appropriate cord, this monitor will not
conform to mandatory FCC Standards.
Example of plug types
for 100 to120 V AC for 200 to240 V AC
• Before disconnecting the power cord, wait at least 30 seconds
after turning off the power to allow the static electricityon the
screen’s surface to discharge.
• After the power is turned on, the screen isdemagnetized
(degaussed) for about 3 seconds. This generates a strong
magnetic field aroundthescreen, which may affectdata stored on
magnetic tapes and disksplaced near the monitor. Besure tokeep
magnetic recording equipment, tapes and disks away from the
monitor.
The equipment should be installed near an easily accessible
outlet.
SECTION 1
GENERAL
US
3
CPD-4401
CPD-4401
— 6 —
Use of the Tilt/Swivel
This monitor can be adjusted within the anglesshown below. To
turnthe monitor vertically or horizontally, hold it at the bottom with
both hands.
90°
15°
90°
5°
Video Connector
1234
6
11 12 13 14 15
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 Horizontal Sync
7 Green return 14 Vertical Sync
5
987
10
15 SCL (serial clock)
Automatically sizing and centering
the picture
You can easily adjust the picture to fillthe screen by pressing the
Auto Sizing and Centering button.
Press the Auto Sizing and Centering button.
The picture automaticallyfills the screen.
Adjusting the Picture Brightness
and Contrast
1 Press the (BRIGHTNESS)v/V or6 (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.
BRIGHTNESS/CONTRAST
26 26
Customizing Your Monitor
The OSD (On-screen Display)
System
Introducing the OSD System
You can adjustmost of the monitor’s settings usingthe OSDs (OnscreenDisplay). All of the OSDs in this illustrationare described on
the following pages in order. You can access any of these OSDs
from the MENU OSD. To adjust monitorsettings 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.
1
2
3
4
5
6
7
Resolutionfor current
input signal
1 SIZE/CENTER 2 GEOMETRY 3 COLOR
SIZE/CENTER
26
4 CONVERGENCE 5 LANGUAGE 6 OPTION
CONVERGENCE
26
GEOMETRY
LANGUAGE
ENGLISH
FRANÇAIS
DEUTSCH
ESPAÑOL
ITALIANO
NEDERLANDS
SVENSKA
2 Highlight the desired OSD using theBRIGHTNESS buttons and
press the MENU button again.
3 If necessary, use the BRIGHTNESS buttons to selecta specific
item.
4 Adjust the monitor setting using the BRIGHTNESS and
CONTRAST buttons.
• To reset the current item to itsoriginal setting, pressthe
(RESET) button whilethe item’s adjustmentOSD is
displayed.
5 When you finish adjustingthe setting,pressthe MENU button to
return to the MENU OSD.
Press the MENU button twice to return tonormal viewing.
• Resetting: Ifyou press theRESET button while an OSD is
displayed, only the current adjustment item is reset. For
additional information on using the resetfunction, see the
“Resetting the Adjustments” sectionon page 9.
• Each of the adjustment’s OSD automatically disappears after
30 seconds.
MENU
MENU
EXIT
SIZE/CENTER
GEOMETRY
COLOR
CONVERGENCE
LANGUAGE
OPTION
HELP
80.0kHz/ 75Hz
1280 X 1024
26
OK
Horizontal/Vertical
frequencies for
current input signal
COLOR
9300K
5000K
sRGB
OPTION
DEGAUSS
ON
Note
• This function isintended for use with a computer running Windows or
similar graphic user interfacesoftware that provides afull-screen picture.
It may not work properly if the background color isdark or if the input
picture does notfill the screen to theedges (such as anMS DOS prompt).
7 HELP
HELP
RETURN TO MAIN MENU
RECOMMENDED RESOLUTION
FLICKER
THIN HORIZONTAL LINE
DISTORTED SHAPE
OUT OF FOCUS
DISCOLORATION
5
6
Adjusting the Settings
8
4 Adjusting the quality of the
picture (CONVERGENCE)
The CONVERGENCE settings allow you to adjustthe quality of
the picture by eliminating red or blue shadows aroundletters,
characters and lines.
Both settings arestored 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 andpress the MENU button
again.
The CONVERGENCE menu appears on the screen.
3
First press the v/V buttons to selectthe 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.
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 buttonsto highlight LANGUAGE
and press the MENUbutton again.
The LANGUAGE menu appears on the screen.
3
Press the v/V buttons to select thelanguage 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 theOSD horizontal position,adjust the OSD vertical
position and lockthe controls using the OPTION OSD.
1
Press the MENU button.
The main MENU appears on the screen.
2
Pressthe v/V buttons tohighlight OPTIONand
press the MENU buttonagain.
The OPTION menu appears on the screen.
3
Press the v/V buttons to highlight the desired
adjustment item.
Adjust the selected item according tothe following instructions.
The OSD automatically disappears after about 30 seconds. To
close the OSD, press the MENU button again.
Degaussing the monitor
The monitor isautomatically degaussed (demagnetized) whenthe
power is turned on.
To manually degauss the monitor, first press the
v/V buttons tohighlight (MANUAL DEGAUSS).
Then press only the right 6 b button.
The monitor is degaussed for about five seconds. If a second
degauss cycle isneeded, allow a minimum interval of 20
minutes for the best result.
Adjusting the moire
To adjust the moire, firstpress the v/V buttons to
highlight (MOIRE ADJUST). Then press the
6 B/b buttons to adjustthemoire until theeffect is at
a minimum.
* Moire is a type ofnatural interference which produces soft,wavy lines on
your screen. Itmay 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 changethe horizontalposition of the OSD,first
press the v/V buttons tohighlight (OSD H
POSITION). Then press the 6 B/b buttons to adjust
the horizontalposition of the OSD.
Adjusting the OSD Vertical Position
To change the verticalpositionof the OSD,firstpress
the v/V buttonsto highlight (OSD V
POSITION). Then press the 6 B/b buttons to adjust
the verticalposition of the OSD.
Locking the controls
To protect adjustment data by locking the controls,
first press v/V buttons tohighlight
(CONTROLLOCK). Then press the 6 B/b buttons
to togglethe ControlLock on or off.
Only the 1 (power) switchand MENU buttonwill operate.
Example of moire
OSD H
POSITION
OPTION
26
OSD V
POSITION
OPTION
26
1 Adjusting the size and centering
of the picture (SIZE/CENTER)
— 7 —
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 theMENU button again.
The SIZE/CENTER menuappears 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.
Select To
HORIZONTALCENTERING
VERTICAL CENTERING
HORIZONTALSIZING
VERTICAL SIZING
ZOOM
Note
Adjustment stops when either the horizontal or vertical size reaches its
maximum or minimum value.
shift the picture to the left or
right
shift the pictureup or down
enlargeorreducethepicture
width
enlargeorreducethepicture
height
enlargeorreducethepicture
width and height
proportionally
2 Adjusting the shape of the
picture (GEOMETRY)
The GEOMETRY settingsallow you to adjust therotation and
shape of thepicture.
The rotation settingis stored in memory for all input signals.All
other settings are stored in memoryfor the currentinput 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 MENUbutton again.
The GEOMETRY menuappears on the screen.
3
First press the v/V buttons to selectthe 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.
Select To
ROT ATION
PINCUSHION
PIN BALANCE
KEYSTONE
KEY BALANCE
3 Adjusting the color of the picture
(COLOR)
The COLOR settings allow you to adjust thepicture’s color
temperature by changing the color level ofthe white color field.
Colors appear reddishif the temperatureis low, and bluish if the
temperature is high.This adjustment is useful for matchingthe
monitor’s colors toa printed picture’s colors.
This setting is stored in memory for allinput signals.
1
Press the MENU button.
The main MENU appears on the screen.
2
Press the v/V buttonsto highlight COLOR and
press the MENU buttonagain.
The COLOR menu appears on the screen.
3
Press the v/V buttons to select a color
temperature.
The preset color temperatures are 9300Kand 5000K. Since the
defaultsettingis 9300K, the whites change from a bluishhue to
a reddish hue as the temperature islowered to 5000K.
You can also fine tunethecolor temperature by selecting in
step 2 above,and using the 6 B/b buttons to adjustthe color
temperaturemanually.
You can choosethe optimal Brightness/Contrastsetting by
turning the sRGBfeature on. To turnit on, selectsRGB in step
2 above, and press the 6 b button.
This OSD allows you to adjust the colortemperature between
9300K and 5000K.
Press the 6 B/b buttons to adjustthe color temperature.
The OSD automaticallydisappearsafter about 30 seconds. To
close the OSD, press the MENU button again.
Note
The sRGB optimal setting will be undone once the brightness and/or the
contrast adjustment is made manually.
rotate the picture
expand or contractthe picture sides
shift the picturesides to the left orright
adjust the picturewidth at thetop of the
screen
shift the picture to theleft or right at the
top of the screen
COLOR
9300K
5300K
26
sRGB
7
CPD-4401
Restoring the Color Image
11
If Thin Lines Appear on Your Screen (damper wires)
The lines you may beseeing on your screen arenormal forthe Trinitronmonitor andare nota malfunction.These are shadowsfrom the damper
wires that stabilizethe aperture grille,and are most noticeable when the screen’s background islight (usually white).
The aperture grille is the essential elementthat makes aTrinitron picture tube uniqueby allowing more lightto reach thescreen, resulting in a
brighter, more detailedpicture.
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.
1 OutofScanRange
This message indicates that the current input signal is not appropriate for the monitor’s specificatons.
2 Power Save Mode
This message indicates that themonitor has reduced powerconsumption.
3 Check Signal Cable (self test pattern)
This message indicates that either no input signal is received, or the video cable is not connected.
Damper wires
Approx. 7 cm
Approx. 7 cm
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
The color of mostdisplay monitorstendto gradually lose brilliance
after several years of usage. The Image Restoration feature allows
you to restore the color to the original factory preset levels.
To restore the image, first press the v/V buttons to select
(COLOR RETURN). Then press the right 6 b button.
A white rectangle appears in the center of the screen while the
image is being restored (about two seconds).
OPTION
Resetting the adjustments
Resetting a specific adjustment
Navigate through theon-screen menus toselectthe adjustment item
you want to reset, and press the RESET button before the OSD
disappears.
CPD-4401
ON
COLOR
RETURN
— 8 —
Note
Before using this feature, the monitor must be in normaloperation mode for
at least 30 minutes.
If the monitor goes into power saving mode, you mustreturn the monitor to
normal operation mode and wait for 30 minutes forthe monitor to beready.
You may need toadjust your computer’s powersaving settings to helpkeep
the monitor in normaloperation mode for thefull 30 minutes. Ifthe monitor
is not ready, the following message will appear.
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 buttonagain.
The HELP OSD appears on the screen.
3
Press the v/V to selectan optionfrom theHELP
menu, then press the MENU button to view theHELP
information.
OPTION
AVAILABLE
AFTER
WARM-UP
COLOR
RETURN
HELP
RETURN TO MAIN MENU
RECOMMENDED RESOLUTION
FLICKER
THIN HORIZONTAL LINE
DISTORTED SHAPE
OUT OF FOCUS
DISCOLORATION
Resetting all of the adjustments for
the current input signal
PresstheRESETbuttonwhennoOSDisdisplayedonthescreen.
Note that the following items are not resetby this method:
• on-screen menu language (page 8)
• on-screen menuposition (page 8)
Resetting all of the adjustment data
to the factory presets
Press and hold the reset button for morethan two seconds. This
resets everything to the factory presets.
Note
The RESET button does not function when
set to ON.
(CONTROL LOCK) is
9
— 9 —
Troubleshooting
If the problemis caused by the connected computeror other equipment ,please refer tothe connected equipment’s instructionmanual.
Symptom Check these items
No picture
If the 1 (power) indicator is not lit • Check thatthe power cordis properly connected.
If the CHECK SIGNAL CABLE
message appears on the screen, or if
the 1 (power) indicator is either
orange oralternating between green
and orange
If the OUT OF SCAN RANGE
message appears on the screen
Picture flickers, bounces,
oscillates, or is scrambled
Picture is fuzzy • Adjust the brightnessand contrast (page 5).
Picture is ghosting • Eliminate theuse of video cable extensions and/orvideo switch boxes.
Picture is not centered or sized
properly
Edgesoftheimagearecurved • Adjust the geometry(page 7).
Wavy or ellipticalpattern (moire) is
visible
Color is not uniform • Degauss the monitor* (page 8). If you place equipment that generates a magnetic field, such
White does not look white • Adjust the color temperature (page 7).
Letters and lines show red or blue
shadows at the edges
Monitor buttons do not operate • IfthecontrollockissettoON,setittoOFF(page8).
A hum is heardright after the
power is turned on
* If a second degauss cycle is needed, allow a minimum interval of 20 minutes for the bestresult. A hummingnoise may beheard, but this is not a malfunction.
• Check thatthe 1 (power)switch is in the “on”position.
• Check that the video 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.
xProblems caused by the connectedcomputer orother equipment
• The computeris in powersaving mode. Try pressingany key on the computer keyboard.
• Check thatthe computer’s power is“on.”
• Check thatthe graphic video board is completely seated inthe proper busslot.
xProblems caused by the connectedcomputer orother equipment
• Check thatthe video frequency rangeis within that specified for the monitor. If you replaced
an old monitor withthismonitor,reconnect the old monitor andadjust the frequency rangeto
the following:
Horizontal: 30– 107kHz
Vertical:48 – 120 Hz
• Isolate and eliminate any potential sources of electric or magnetic fields such as other
monitors, laser printers,electric fans, fluorescentlighting 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 adifferent circuit.
• Try turning the monitor 90° to the left or right.
xProblems caused by the connectedcomputer orother equipment
• Check yourgraphicvideo board manualfor the proper monitorsetting.
• Confirm that the graphics mode (VESA,VGA, etc.) and the frequencyof the input signal are
supported by thismonitor (Appendix). Evenif the frequencyis within the proper range,
some graphic videoboards may have a sync pulse that is toonarrow for the monitor to sync
correctly.
• Adjust the computer’s refresh rate (vertical frequency)to obtain the best possible picture.
• Degauss themonitor* (page 8).
• Adjust the moire (page 8).
• Check that all plugs are firmly seated in their sockets.
• Adjust the size (page 7) or centering (page 7).Note that somevideo modes do not fill the
screen to the edges.
• Adjust the moire (page 8).
xProblems caused by the connectedcomputer orother equipment
• Change your desktop pattern.
as a speaker, near the monitor, or if you change the direction the monitor faces, color may
lose uniformity.
• Adjust the convergence (page 8).
• This is thenormalsound of the auto-degauss cycle. When thepoweris turned on, the monitor
is automatically degaussed for 5 seconds.
12
CPD-4401
CPD-4401
SECTION 2
DISASSEMBLY
2-1. CABINET/SHIELD REMOVAL
Push in the tip of a screwdriver
about 5mm to unlock the claw.
4
Four screws
(+ BVTP 4 x 8)
5
8
Three screws
(+BVTT 4 x 8)
9
Side cover
Top cover
9
Side cover
T o remove the rear cover of the unit, press in and unsnap the claw on
the right side of the unit, then press in and unsnap the right claw at
the top of the unit. Repeat this with the claw on the left side and
top left of the unit and remove.
Bezel assembly
7
8
Three screws
(+BVTT 4 x 8)
6
Video shield
2-2. SERVICE POSITION
Cabinet
1
Two screws
(+ BVTP 4 x 16)
Cabinet
2
Two claws
1
A board
1 When the D board is placed in service position, the Safety Earth Wire
(black wire) is disconnected.
2 After service is completed and the D board reinstalled, the Safety Earth
Wire must be reattached to the chassis. This must be confirmed before
any subsequent procedures are attempted.
Cabinet
2
Two claws
Three screws
(+BVTT 4 x 8)
Bezel assembly
3
rotate 180º
2
D board
2-3. D, A, H and N BOARD REMOVAL
9
Two screws
(BVTT 4 x 8)
11
H board
10
N board
8
D board
7
One screw
(BVTT 4 x 8)
6
Five screws
(BVTP 3 x 8)
5
Holder
7
One screw
(BVTT 4 x 8)
3
One screw
(BVTT 4 x 8)
4
Cable bracket
2
A board
1
Three screws
(BVTT 4 x 8)
— 10 —
2-4. PICTURE TUBE REMOVAL
2
A board
3
Neck ass'y
4
Deflection yoke
5
Two screws
(BVTP 4 x 16)
6
Four screws
(Tapping screw 5)
Picture tube shield
9
Demagnetization coil
Tension spring
7
Two screws
(BVTP 4 x 16)
CPD-4401
1
Anode-cap
8
Stand
ass'y
(D board)
Cushion
REMOVAL OF THE ANODE-CAP
WARNING: Short circuit the anode of the picture tube and the anode-cap to the metal chassis, CRT shield or carbon painted on the
CRT, after removing the anode.
REMOVAL PROCEDURES
1. Turn up one side of the rubber cap in
the direction indicated by arrow .
HOW TO HANDLE AN ANODE-CAP
1. Do not use sharp objects which may cause damage to the surface
of the anode-cap.
2. Do not squeeze the rubber covering too hard to avoid damaging the
anode-cap. A material fitting called a shatter-hook terminal is built into
the rubber.
3. Do not force turn the foot of the rubber cover. This may cause the
shatter-hook terminal to protrude and damage the rubber.
2. Use your thumb to pull the rubber cap firmly
in the direction indicated by arrow .
3. When one side of the rubber cap
separates from the anode button, the
anode-cap can be removed by turning
the rubber cap and pulling it in the
direction of arrow .
— 11 —
CPD-4401
SECTION 3
SAFETY RELA TED ADJUSTMENT
When replacing parts shown in the table below, the following
operational checks must be performed as a safety precaution
against X-ray emissions from the unit.
Part Replaced ( )
HV ADJ RV901
Part Replaced ( )
HV Protector T901 (FBT), R917, R918, R923, R920,
Circuit R919, R1004, C920, D911, D912
Beam Current R933, R932, R921, R1006, D915,
Protector Circuit D917, IC901, T901 (FBT)
HV Regulator T901 (FBT), IC901, R924, R925,
Circuit RV901
Allow the unit to warm-up for one minute prior to checking
the following conditions:
HV Regulator Check
1) Input white cross hatch signal. (fH = 106.3 kHz)
2) CONT and BRT Control normal condition.
3) Input voltage: 120 ± 2 VAC
4) Confirm that the voltage is within the voltage range shown
below.
Standard voltage: 27.0KV ± 0.2KV
5) When replacing components identified by
sure to recheck the High Voltage.
6) Verify the High Voltage as shown above (27.0KV
+0.2KV) is within specification. If not, RV904 on D board.
7) After adjusting the High Voltage within specification, put
the RV cover on RV901 as shown below and apply
sufficient amount of RTV around RV901.
, make
HV Protector Check
1) Confirm the voltage more than 15.0 VDC between D912
cathode and GND on D Board.
2) Using an external DC power supply, apply the voltage
shown below between cathode of D915 on D Board and
GND.
Confirm that the HV protector circuit (Hold down) works
and CRT screen disappears when applying the voltage
protector as shown below.
Standard DC Voltage: 21.1 +0.00 / - 0.05 VDC
Check Condition
• Input voltage : 120 ± 2 VAC
• Input signal : (fH = 31.4 kHz), Cross Hatch
• CONT and BRT Control: Normal Condition
Beam Current Protector Check
(Software Logic)
1) Using an external current source, apply 1.68mA from pin
of T901 (FBT) to GND on D Board. Confirm that the
software logic beam current protector works and that the
CRT screen disappears.
Check Condition
• Input voltage : 120 ± 2 VAC
• Input signal : (fH = 31.4 kHz), Cross Hatch
• CONT and BRT Control: Normal Condition
B± Maximum Check
1) Input white cross hatch (fH = 106.3 kHz) signal.
2) Beam control: Normal condition
3) Input voltage: 100 - 120 VAC
Note: Use NF power supply or make sure that
distortion factor is 3% or less.
4) Confirm that the voltage is within the voltage range
shown below.
Standard voltage: 195.0 -205.0 VDC
RV901
— 12 —
CPD-4401
a
b
SECTION 4
ADJUSTMENTS
Connect the communication cable of the connector located on the D board on the monitor. Run the service software and then foll ow
these instructions.
IBM AT Computer
as a Jig
1-690-391-21
1
D-sub
(9 Pin [female])
*The parts above ( ~ ) are necessary for DAS adjustment.
mini Din
(8Pin)
1
A-1500-819-A
2
Interface Unit
3
4 Pin
3
4 Pin 4 Pin
Allow a 30 minute warm-up period prior to making the following adjustments:
4-1. Landing Rough Adjustment
1. Enter the full white signal.
2. Adjust the contrast to the maximum.
3. Input full green signal.
(Note: Turn off the outputs from R ch and B ch of SG)
4. Move the DY backward and adjust the purity magnet
coarsely so that a green raster positions in the center of
screen.
5. Moving the DY forward, adjust so that an entire screen
becomes pure green.
6. Adjust DY Tilt, use TLV of DY for this adjustment. Fix
the
Register "TILT" to 0.
7. Lightly tighten the DY screw.
3-702-691-01
Connector Attachment
To BUS CONNECTOR
Fasten wedges so that DY does not move.
14. If landing does not meet specifications, correct with a
disc magnet.
15. Perform auto-degauss.
16. Remove sensor and wobbling coil.
17. Confirm that there is no DY tilt. Affix purity magnet on
DY using white paint.
4-2. Landing Fine Adjustment
1. Place the set in the Helmholtz coil.
2. Set TLH plate to the zero position.
3. Adjust Purity Magnet on the Neck Assembly to zero
position and secure it with white pin.
4-3. Convergence Rough Adjustment
1. Enter the white crosshatch signal.
2. Roughly adjust the H. STAT and V. STAT with a
four-pole magnet.
3. Roughly adjust HMC and VMC with a six-pole magnet.
4. Set "VPIN SAW TOP" and "VPIN SAW BTM" to zero
position.
5. Display a plain green pattern.
6. Degauss CRT and shield with hand-degausser .
7. Perform auto-degauss.
4-4. Convergence Fine Adjustment
1. Display crosshatch pattern with R and B.
2. Adjust H. STAT and V. STAT with 4-pole magnet.
(Do not adjust H.STAT and V.STAT with resistor.)
8. Attach a wobbling coil to the specified position of CRT.
9. Attach a landing adjuster sensor on the CRT.
10. Using a landing checker, adjust the DY position, purity,
tilt of DY.
11. Tighten the DY screw.
Clamping torque: 22 ± 2 kg.cm (2.2 ± 0.2 N.m)
12. Perform auto-degauss.
13. Adjust top and bottom pin pitching DY by up and down
with two wedges so that (a) is equal to (b)(see the figure
at right). Also, leave the yaw of DY to the physical
center position with another two wedges.
CRT
DY
TLV VR (Unused)
XCV Core
2 Pole
6 Pole Mg
A Board
Neck Assy
2 Pole (Unused)
4 Pole Mg
TLH Plate
— 13 —
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