IBM 6550-23N User manual

CHASSIS
SERVICE MANUAL
SPECIFICATIONS
D99
6550-23N/63N
US Model
Canadian Model
AEP Model
6550-23N : Chassis No. SCC-L29D-A
6550-63N : Chassis No. SCC-L29G-A
6550-23S/63S
S. Hemisphere Model
6550-23S : Chassis No. SCC-L29E-A
6550-63S : Chassis No. SCC-L29H-A
6550-33N/73N
Japan Model
6550-33N : Chassis No. SCC-L29F-A
6550-73N : Chassis No. SCC-L29J-A
COLOR MONITOR
6550-23N/23S/33N/63N/63S/73N
MODEL SPEC.
BODY COLOR DEST.
6550-23N US, CND, AEP
6550-23S WHITE TYPE SH
6550-33N J
6550-63N US, CND, AEP
6550-63S BLACK TYPE SH
6550-73N J
Picture tube 0.24 mm aperture grille pitch
17 inches measured diagonally
90-degree deflection
Viewable image size Approx. 327 ×243 mm (w/h)
(12
7
/ 8 ×9
5
/ 8 inches)
16.0” viewable diagonal
Resolution Horizontal: Max. 1600 dots
Vertical: Max. 1200 lines
Standard image area Approx. 312 ×234 mm (w/h)
(12
3
/ 8 ×9
1
/ 4 inches)
Deflection frequency Horizontal: 30 to 94 kHz
Vertical: 48 to 120 Hz
300 <Total Line <1700
AC input voltage/current
100 to 240 V, 50 – 60 Hz, Max. 1.7 A
Power consumption Max. 130 W
Dimensions Approx. 406 ×416 ×431 mm
(w/h/d)
(16 ×16
1
/ 2 ×17 inches)
Mass Approx. 20 kg (44 lb 1 oz)
* Recommended horizontal and vertical timing condition
• Horizontal sync width should be more than 1.0 µsec.
• Horizontal blanking width should be more than
3.0␣ µsec.
• Vertical blanking width should be more than 500 µsec.
Design and specifications are subject to change without
notice.

6550-23N/23S/33N/63N/63S/73N
– 2 –
DIAGNOSIS
Failure Power LED
HV/+B Failure Blink Amber (On 0.5 sec, Off 0.5 sec)
H Stop or V Stop (Included S-Cap) Blink Amber (On 0.5 sec, Off 0.5 sec)
ABL Failure Blink Amber (On 0.5 sec, Off 1.5 sec)
Aging/Self-Test Blink Amber (On 0.5 sec, Off 0.5 sec) .... Blink Green (On 0.5 sec, Off 0.5 sec)
TIMING SPECIFICATION
PRIMARY MODE PRIMARY
MODE AT PRODUCTION MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MODE 6 MODE 7 MODE 8 MODE 9 MODE 10
RESOLUTION 640 X 480 640 X 480 640 X 480 800 X 600 800 X 600 1024 X 768 1024 X 768 1280 X 1024 1280 X 1024 1600 X 1200
CLOCK 25.175 MHz 31.500 MHz 36.000 MHz 49.500 MHz 56.250 MHz 78.750 MHz 94.500 MHz 135.000 MHz 157.500 MHz 202.500 MHz
— HORIZONTAL —
H-FREQ 31.469 kHz 37.500 kHz 43.269 kHz 46.875 kHz 53.674 kHz 60.023 kHz 68.677 kHz 79.976 kHz 91.146 kHz 93.750 kHz
usec usec usec usec usec usec usec usec usec usec
H. TOTAL 31.778 26.667 23.111 21.333 18.631 16.660 14.561 12.504 10.971 10.667
H. BLK 6.356 6.349 5.333 5.172 4.409 3.657 3.725 3.022 2.844 2.765
H. FP 0.636 0.508 1.556 0.323 0.569 0.203 0.508 0.119 0.406 0.316
H. SYNC 3.813 2.032 1.556 1.616 1.138 1.219 1.016 1.067 1.016 0.948
H. BP 1.907 3.810 2.222 3.232 2.702 2.235 2.201 1.837 1.422 1.501
H. ACTIV 25.422 20.317 17.778 16.162 14.222 13.003 10.836 9.481 8.127 7.901
— VERTICAL —
V. FREQ(HZ) 59.940 Hz 75.000 Hz 85.008 Hz 75.000 Hz 85.061 Hz 75.029 Hz 84.997 Hz 75.025 Hz 85.024 Hz 75.000 Hz
lines lines lines lines lines lines lines lines lines lines
V. TOTAL 525 500 509 625 631 800 808 1066 1072 1250
V. BLK 45 20 29 25 31 32 40 42 48 50
V. FP 10 1 1 1 1 1 1 1 1 1
V. SYNC 2 3 3 3 3 3 3 3 3 3
V. BP 33 16 25 21 27 28 36 38 44 46
V. ACTIV 480 480 480 600 600 768 768 1024 1024 1200
— SYNC —
INT(G) NO NO NO NO NO NO NO NO NO NO
EXT(H/V)/POLARITY YES -/- YES -/- YES +/+ YES +/+ YES +/+ YES +/+ YES +/+ YES +/+ YES +/+ YES +/+
EXT(CS)/POLARITY NO NO NO NO NO NO NO NO NO NO
INT/NON INT NON INT NON INT NON INT NON INT NON INT NON INT NON INT NON INT NON INT NON INT
99.5.18 VER.
Power Saving Function
This monitor meets the power-saving guidelines set by
VESA and
E NERGY S TAR, as well as the more stringent
NUTEK .
If the monitor is connected to a computer or video graphics
board that is VESA DPMS (Display Power Management
Signaling) compliant, the monitor will automatically reduce
power consumption in three stages as shown below.
Notes
When your computer is in a power saving mode, MONITOR IS IN
POWER SAVE MODE appears on the screen if you press any
button on the monitor (page 15). After a few seconds, the monitor
enters the power saving mode again. Once the horizontal and
vertical sync signals are detected, the monitor automatically
resumes its normal operation mode.
1
2
3
4
5
Recovery time
—
Approx. 5 sec.
Approx. 5 sec.
Approx. 15 sec.
—
uindicator
Green
Green and orange
alternate
Green and orange
alternate
Orange
Off
Power
consumption
≤130 W
≤15 W
≤15 W
≤3 W
≤0.5 W
Screen
active
blank
blank
blank
—
Horizontal
sync signal
present
absent
present
absent
—
Vertical
sync signal
present
present
absent
absent
—
Power consumption
mode
Normal operation
Standby (1st mode)
Suspend (2nd mode)
(sleep)*
Active-off (3rd mode)
(deep sleep)*
Power-off

6550-23N/23S/33N/63N/63S/73N
– 3 –
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any exposed metal part hav-
ing a return to chassis, must not exceed 0.5 mA (500
microampers).
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 instruments.
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” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are
examples of a passive VOMs that are suitable. Nearly all
battery operated digital multimeters that have a 2 V AC
range are suitable. (See Fig. A)
WARNING!!
NEVER TURN ON THE POWER IN A CONDITION IN
WHICH THE DEGAUSS COIL HAS BEEN REMOVED.
SAFETY-RELATED COMPONENT WARNING!!
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 PARTS WHOSE PART NUMBERS AP-
PEAR AS SHOWN IN THIS MANUAL OR IN SUPPLE-
MENTS PUBLISHED BY SONY. CIRCUIT ADJUST-
MENTS THAT ARE CRITICAL FOR SAFE OPERATION
ARE IDENTIFIED IN THIS MANUAL. FOLLOW THESE
PROCEDURES WHENEVER CRITICAL COMPONENTS
ARE REPLACED OR IMPROPER OPERATION IS SUS-
PECTED.
AVERTISSEMENT!!
NE JAMAIS METTRE SOUS TENSION QUAND LA
BOBINE DE DEMAGNETISATION EST ENLEVÉE.
ATTENTION AUX COMPOSANTS RELATIFS À LA
SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE TRAME ET
UNE MARQUE ¡SONT CRITIQUES POUR LA SÉCURITÉ.
NE LES REMPLACER QUE PAR UNE PIÈCE PORTANT LE
NUMÉRO SPECIFIÉ. LES RÉGLAGES DE CIRCUIT DONT
L’IMPORTANCE EST CRITIQUE POUR LA SÉCURITÉ DU
FONCTIONNEMENT SONT IDENTIFIÉS DANS LE
PRÉSENT MANUEL. SUIVRE CES PROCÉDURES LORS
DE CHAQUE REMPLACEMENT DE COMPOSANTS CRI-
TIQUES, OU LORSQU’UN MAUVAIS FONCTIONNEMENT
EST SUSPECTÉ.
After correcting the original service problem, perform the fol-
lowing safety checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly-sol-
dered 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 tran-
sistors, 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.
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY CHECK-OUT
1.5 k Ω 0.15 µ FAC Voltmete
r
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground

6550-23N/23S/33N/63N/63S/73N
– 4 –
TABLE OF CONTENTS
Section Title Page
1. GENERAL .................................................................. 1-1
2. DISASSEMBLY
2-1. Cabinet and EMI Shield Removal ...................... 2-1
2-2. A and D Boards Removal ................................... 2-2
2-3. Service Position .................................................... 2-2
2-4. Picture Tube Removal .......................................... 2-3
3. SAFETY RELATED ADJUSTMENT............. 3-1
4. ADJUSTMENTS ...................................................... 4-1
5. DIAGRAMS
5-1. Block Diagrams ................................................... 5-1
5-2. Circuit Boards Location ...................................... 5-5
5-3. Schematic Diagrams and Printed Wiring Boards ...... 5-6
(1) Schematic Diagram of D Board ........................... 5-7
(2) Schematic Diagram of A Board .......................... 5-19
5-4. Semiconductors ................................................... 5-21
6. EXPLODED VIEWS
6-1. Chassis ................................................................. 6-1
6-2. Picture Tube.......................................................... 6-2
6-3. Packing Materials ................................................ 6-3
7. ELECTRICAL PARTS LIST ............................ 7-1

1-1
SECTION 1
GENERAL
The operating instructions mentioned here are partial abstracts
from the Operating Instruction Manual. The page numbers of
the Operating Instruction Manual remein as in the manual.
2
Getting Started
Use of the Tilt-Swivel
This monitor can be adjusted within the angles shown
below. To find the center of the monitor’s turning radius,
align the center of the monitor’s screen with the centering
dots on the stand.
Hold the monitor at the bottom with both hands when you
turn it horizontally or vertically. Be careful not to pinch
your fingers at the back of the monitor when you tilt the
monitor up vertically.
Note
Do not remove the tilt-swivel base from the monitor.
Warning on power connection
• Use an appropriate power cord for your local power
supply.
Examples of plug types:
• Before disconnecting the power cord, wait at least 30
seconds after turning off the power to allow the static
electricity on the CRT display surface to discharge.
• After the power has been turned on, the CRT is
demagnetized (degaussed) for about 5 seconds. This
generates a strong magnetic field around the metal frame,
which may affect the data stored on magnetic tapes and
disks near the bezel. Place magnetic recording equipment,
tapes, and disks away from this monitor.
The equipment should be installed near an easily
accessible electrical outlet.
Precautions
Installation
• Prevent internal heat build-up by allowing adequate air
circulation. Do not place the monitor on surfaces (rugs,
blankets, etc.) or near materials (curtains, draperies) that
may block the ventilation holes.
• Do not install the monitor near heat sources such as
radiators or air ducts, or in a place subject to direct
sunlight, excessive dust, mechanical vibration, or shock.
• Do not place the monitor near equipment which generates
magnetism, such as a transformer or high voltage power
lines.
Maintenance
• Clean the cabinet, panel and controls with a soft cloth
lightly moistened with a mild detergent solution. Do not
use any type of abrasive pad, scouring powder, or
solvent, such as alcohol or benzine.
• Do not rub, touch, or tap the surface of the screen with
sharp or abrasive items such as a ballpoint pen or
screwdriver. This type of contact may result in a scratched
picture tube.
• Clean the screen with a 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.
Transportation
When you transport this monitor for repair or shipment, use
the original carton and packing materials.
Getting started
for 100 to 120 V AC for 200 to 240 V AC for 240 V AC only
90°
90°
15°
5°
Centering dots
3
Getting Started
Getting Started
F
EN
ES
C
Identifying Parts and Controls
See the pages in parentheses for further details.
Front
1?(reset) button (page 13)
Resets the adjustments to the factory settings.
2¨(brightness) down and up (./>) buttons
(pages 5 – 13)
Adjust the picture brightness.
Function as the (./>) buttons when adjusting other
items.
3(menu) button (pages 5 – 13, 15)
Displays the MENU OSD.
4>(contrast) left and right (?//) buttons
(pages 5 – 13, 18)
Adjust the contrast.
Function as the (?//)buttons when adjusting other
items.
5u(power) switch and indicator (pages 14,
18)
Turns the monitor on or off.
The power indicator lights up in green when the
monitor is turned on, and either flashes in green and
orange, or lights up in orange when the monitor is in
power saving mode.
Rear
6AC IN connector (page 4)
Provides AC power to the monitor.
7Video input connector (HD15) (page 4)
Inputs RGB video signals (0.700 Vp-p, positive) and
SYNC signals.
Pin No.
1
2
3
4
5
6
7
Pin No.
8
9
10
11
12
13
14
15
Signal
Red
Green
(Sync on Green)
Blue
ID (Ground)
DDC Ground*
Red Ground
Green Ground
Signal
Blue Ground
—
Ground
ID (Ground)
Bi-Directional
Data (SDA)*
H. Sync
V. Sync
Data Clock(SCL)*
* Display Data Channel (DDC) Standard of VESA
1 2 3 4 5
87611 12 13 14 15
10
9

1-2
4
Getting Started
to a power outlet to AC IN
Power cord
Setup
This monitor works with platforms running at horizontal
frequencies between 30 and 94 kHz.
Step 1: Make sure the computer and
monitor are switched off
Step 2: Connect the monitor to the
computer
Connect the video signal cable to the video output of the
computer.
Note
Do not short the pins of the video signal cable.
Step 3: Connect the power cord
With the monitor switched off, connect one end of the
proper power cord for your local supply to the monitor and
the other end to a power outlet.
Step 4: Turn on the monitor and computer
To a computer video
output connector
Step 5: Adjust the monitor’s controls
according to your personal
preference
The installation of your monitor is complete.
Note
If no picture appears on the screen and “MONITOR IS WORKING”
or “MONITOR IS IN POWER SAVE MODE” appears on the screen,
see “Warning Messages” on page 15.
Workplace Preparation
Positioning the Monitor
Choose a suitable place to position the monitor where it is
not near fluorescent desk lighting or any equipment that
produces magnetic fields that could cause interference.
Ensure that the furniture or equipment can support the
weight of the monitor. Allow at least 2 inches (50mm)
ventilation space around the monitor.
Height
The monitor should be positioned so that the top of the
screen is slightly below your eye level when you sit at your
workstation.
Orientation
Choose a position that gives the least reflection from lights
and windows, usually at a right angle to any windows. The
monitor should be positioned directly in front of you so that
you do not have to twist your body. Tilt the monitor to a
comfortable viewing angle.
Working Practices
Rest
Take regular breaks. Vary your posture, and stand up and
stretch occasionally as prolonged use of computer
workstations can be tiring.
Back
You should sit back in the chair and use the backrest.
Hands
Use a light touch on the keyboard, keeping your hands and
fingers relaxed. Allow a space in front of the keyboard to
rest your wrists when not typing. Consider using a
wristpad.
Eyesight
Working with monitors, in common with any kind of
prolonged close work, can be visually demanding. Look
away from the screen periodically and have your eyesight
checked regularly.
Screen settings
Set the screen brightness and contrast to a comfortable level.
You may have to adjust this as the lighting changes during
the day. Many application programs let you select color
combinations which can help you to view in comfort.
5
Getting Started
F
EN
ES
C
Customizing Your Monitor
Before adjusting
• Connect the monitor and the computer, and turn them on.
Selecting the On-screen Display
Language
If you need to change the OSD language, see “Using the
LANGUAGE On-screen Display” on page 10.
The default setting is English.
Adjusting the Picture Brightness
and Contrast
Once the setting is adjusted , it will be stored in memory for
all input signals received.
1
Press the ¨(brightness) ./>or >(contrast) ?//
buttons.
The BRIGHTNESS/CONTRAST OSD appears.
2
For brightness adjustment
Press the ¨./>buttons.
>. . . for more brightness
.. . . for less brightness
For contrast adjustment
Press the >?//buttons.
/. . . for more contrast
?. . . for less contrast
The OSD automatically disappears after about 3 seconds.
To reset, press the ?(reset) button while the OSD is on.
The brightness and contrast are both reset to the factory
settings.
Customizing Your Monitor
26 26
BRIGHTNESS/CONTRAST
EX I T
SIZE/CENTER
GEOMETRY
CONVERGENCE
COLOR
HELP
LANGUAGE
OPT ION
MENU
OK
68.7kHz/ 85Hz
1024x 768
Introducing the On-screen
Display System
Most adjustments are made using the MENU OSD.
MENU OSD
Press the button to display the MENU OSD.
This MENU OSD contains links to the other OSDs described
below.
1EXIT
Closes the MENU OSD.
2SIZE/CENTER
Displays the SIZE/CENTER OSD for adjusting the
picture’s size, centering, or zoom.
3GEOMETRY
Displays the GEOMETRY OSD for adjusting the picture
rotation and pincushion, etc.
4COLOR
Displays the COLOR OSD for adjusting the color
temperature.
5CONVERGENCE
Displays the CONVERGENCE OSD for adjusting the
picture’s horizontal and vertical convergence.
6LANGUAGE
Displays the LANGUAGE OSD for selecting the
language.
7OPTION
Displays the OPTION OSD for adjusting the OSD
position, degaussing the screen, etc.
8HELP
Displays the HELP OSD for viewing helpful hints and
information about this monitor.
9The horizontal and vertical frequencies of
the current input signal
The horizontal and vertical frequencies of the current
input signal are displayed.
!º The resolution of the current input signal
If the signal matches one of this monitor’s factory preset
modes, the resolution is displayed.

1-3
Customizing Your Monitor
6
To
adjust the horizontal centering of the
picture
adjust the vertical centering of the
picture
adjust the horizontal size of the
picture
adjust the vertical size of the picture
enlarge or reduce the picture
Using the SIZE/CENTER On-
screen Display
The SIZE/CENTER settings allow you to adjust the
picture’s size, centering, or zoom.
Once the setting is adjusted, it will be stored in memory for
the current input signal.
1 Press the button.
The MENU OSD appears.
2 Press the ./>buttons to select “ SIZE/CENTER”
and press the button again.
The SIZE/CENTER OSD appears.
3 Press the ./>buttons to select the item you want to
adjust.
Select
(Horizontal Centering)
(Vertical Centering)
(Horizontal Sizing)
(Vertical Sizing)
(Zoom)
4
Press the ?//buttons to adjust the settings.
Select
(Horizontal Centering)
(Vertical Centering)
(Horizontal Sizing)
(Vertical Sizing)
(Zoom)
Press the button once to return to the MENU OSD, and
twice to return to normal viewing. If no buttons are pressed,
the OSD closes automatically after about 30 seconds.
To reset, press the ?(reset) button while the OSD is on.
The selected item is reset to the factory setting.
Notes
The (Zoom) adjustment stops when the horizontal or vertical
size reaches its maximum or minimum value. The horizontal
adjustment value is not displayed in the menu.
To
/. . . to move the picture right
?. . . to move the picture left
/. . . to move the picture up
?. . . to move the picture down
/. . . to increase picture width
?. . . to decrease picture width
/. . . to increase picture height
?. . . to decrease picture height
/. . . to enlarge the picture
?. . . to reduce the picture
26
SI ZE/CENTER
7
Getting Started
F
EN
ES
C
Customizing Your Monitor
Using the GEOMETRY On-
screen Display
The GEOMETRY settings allow you to adjust the shape and
orientation of the picture.
Once the (Rotation) is adjusted, it will be stored in
memory for all input signals received. All other adjustments
will be stored in memory for the current input signal.
1 Press the button.
The MENU OSD appears.
2 Press the ./>buttons to select “ GEOMETRY” and
press the button again.
The GEOMETRY OSD appears.
3
Press the ./>buttons to select the item you want
to adjust.
Select
(Rotation)
(Pincushion)
(Pin Balance)
(Keystone)
(Key Balance)
To
adjust the picture rotation
adjust the picture sides
adjust the picture side balance
adjust the picture width
adjust the picture shape balance
For
(Rotation)
(Pincushion)
(Pin Balance)
(Keystone)
(Key Balance)
Press
/. . . to rotate the picture clockwise
?. . . to rotate the picture counterclockwise
/. . . to expand the picture sides
?. . . to contract the picture sides
/. . . to move the picture sides to the right
?. . . to move the picture sides to the left
/. . . to increase the picture width at the
top
?. . . to decrease the picture width at the
top
/. . . to move the top of the picture to
the right
?. . . to move the top of the picture to
the left
4 Press the ?//buttons to adjust the settings.
Press the button once to return to the MENU OSD, and
twice to return to normal viewing. If no buttons are pressed,
the OSD closes automatically after about 30 seconds.
To reset, press the ?(reset) button while the OSD is on.
The selected item is reset to the factory setting.
26
GEOMETRY

1-4
8
Customizing Your Monitor
9300K
5000K
COLOR
Using the COLOR On-screen
Display
You can change the monitor’s color temperature. For
example, you can adjust or change the colors of a picture on
the screen to match the actual colors of a printed picture.
Once the setting is adjusted, it will be stored in memory for
all input signals received.
1 Press the button.
The MENU OSD appears.
2 Press the ./>buttons to select “ COLOR” and press
the button again.
The COLOR OSD appears.
3 Press the ./>buttons to select the color
temperature.
There are two color temperature modes in the OSD.
The preset adjustments are 9,300K and 5,000K.
Selecting your own color temperature between
9,300K and 5,000K
Press the ./>buttons to select “ (Variable)” and
adjust by pressing the ?//buttons.
/. . . for a higher temperature (bluish)
?. . . for a lower temperature (reddish)
Press the button once to return to the MENU OSD, and
twice to return to normal viewing. If no buttons are pressed,
the OSD closes automatically after about 30 seconds.
To reset, press the ?(reset) button while the OSD is on.
The selected color temperature is reset to the factory
settings.
9300K
5000K
26
COLOR
Getting Started
Customizing Your Monitor
F
EN
ES
C
9
Using the CONVERGENCE On-
screen Display
The CONVERGENCE settings allow you to adjust the
quality of the picture by controlling the convergence.
The convergence refers to the alignment of the red, green,
and blue color signals.
If you see red or blue shadows around letters or lines, adjust
the convergence.
Once the setting is adjusted, it will be stored in memory for
all input signals received.
1
Press the button.
The MENU OSD appears.
2 Press the ./>buttons to select “ CONVERGENCE”
and press the button again.
The CONVERGENCE OSD appears.
3 Press the ./>buttons to select the item you want to
adjust.
Select
(Horizontal Convergence)
(Vertical Convergence)
To
adjust the horizontal convergence
adjust the vertical convergence
For
(Horizontal Convergence)
(Vertical Convergence)
4 Press the ?//buttons to adjust the settings.
Press the button once to return to the MENU OSD, and
twice to return to normal viewing. If no buttons are pressed,
the OSD closes automatically after about 30 seconds.
To reset, press the ?(reset) button while the OSD is on.
The selected item is reset to the factory setting.
Press
/. . . to shift red shadows to the right
and blue shadows to the left
?. . . to shift red shadows to the left
and blue shadows to the right
/. . . to shift red shadows up and blue
shadows down
?. . . to shift red shadows down and
blue shadows up
26
CONVERGENCE

1-5
10
Customizing Your Monitor
Using the LANGUAGE On-
screen Display
English, French, German, Spanish, Italian, Dutch, Swedish,
Russian, and Japanese versions of the OSDs are available.
1
Press the button.
The MENU OSD appears.
2 Press the ./>buttons to select “ LANGUAGE” and
press the button again.
The LANGUAGE OSD appears.
3 Press the ./>buttons to select the desired language.
• ENGLISH
• FRANÇAIS: French
• DEUTSCH: German
• ESPAÑOL: Spanish
• ITALIANO: Italian
• NEDERLANDS: Dutch
• SVENSKA: Swedish
•: Russian
•: Japanese
Press the button once to return to the MENU OSD, and
twice to return to normal viewing. If no buttons are pressed,
the OSD closes automatically after about 30 seconds.
To reset to English, press the ?(reset) button while the
OSD is on.
Using the OPTION On-screen
Display
The OPTION OSD allows you to manually degauss the
screen, adjust the moire cancellation level, and adjust the
OSD position. It also allows you to lock the controls.
Degaussing the screen
The monitor screen is automatically degaussed
(demagnetized) when the power is turned on.
You can also manually degauss the monitor.
1 Press the button.
The MENU OSD appears.
2 Press the ./>buttons to select “ OPTION” and
press the button again.
The OPTION OSD appears.
3
Press the ./>buttons to select “ (DEGAUSS).”
4 Press the /button.
The screen is degaussed for about 5 seconds.
If you need to degauss the screen a second time, wait for at
least 20 minutes before repeating the steps above.
Press the button once to return to the MENU OSD, and
twice to return to normal viewing. If no buttons are pressed,
the OSD closes automatically after about 30 seconds.
ENGL I SH
FRANÇA I S
DEUTSCH
ESPAÑOL
ITALIANO
NEDERLANDS
SVENSKA
LANGUAGE
DEGAUSS
ON
OPT ION
11
Getting Started
F
EN
ES
C
Customizing Your Monitor
Changing the on-screen display position
You can change the OSD position (for example, when you
want to adjust the picture behind the OSD).
1 Press the button.
The MENU OSD appears.
2 Press the ./>buttons to select “ OPTION” and
press the button again.
The OPTION OSD appears.
3 Press the ./>buttons to select “ (OSD H
POSITION)” or “ (OSD V POSITION).”
Select “ (OSD H POSITION)” to adjust the horizontal
position.
Select “ (OSD V POSITION)” to adjust the vertical
position.
4 Press the ?//buttons to move the OSD to the
desired position.
Press the button once to return to the MENU OSD, and
twice to return to normal viewing. If no buttons are pressed,
the OSD closes automatically after about 30 seconds.
To reset, press the ?(reset) button while the OSD is on.
Adjusting the moire
If elliptical or wavy patterns appear on the screen, adjust the
moire cancellation level.
1 Press the button.
The MENU OSD appears.
2
Press the ./>buttons to select “ OPTION” and
press the button again.
The OPTION OSD appears.
3
Press the ./>buttons to select “ MOIRE* ADJUST.”
4 Press the ?//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.
Example of moire:
Press the button once to return to the MENU OSD, and
twice to return to normal viewing. If no buttons are pressed,
the OSD closes automatically after about 30 seconds.
To reset, press the ?(reset) button while the OSD is on.
DEGAUSS
ON
OPT ION
MO I RE
ADJUST
26
OPT ION
DEGAUSS
ON
OPT ION
OSD H
POS I T ION
26
OPT ION
OSD V
POS I T ION
26
OPT ION

1-6
12
Customizing Your Monitor
Locking the controls
You can protect adjustment data by locking the controls.
1 Press the button.
The MENU OSD appears.
2 Press the ./>buttons to select “ OPTION” and
press the button again.
The OPTION OSD appears.
3 Press the ./>buttons to select “ (CONTROL
LOCK).”
4 Press the /button to select “ON.”
Press the button once to return to the MENU OSD, and
twice to return to normal viewing. If no buttons are pressed,
the OSD closes automatically after about 30 seconds.
Only the u(power) switch, EXIT, and “ (CONTROL
LOCK)” of the “ OPTION” OSD will operate. If any other
items are selected, the mark appears on the screen.
To cancel the control lock
Repeat steps 1 through 3 above and press the ?button to
select “OFF.”
Using the HELP On-screen
Display
The HELP OSD contains helpful hints and information
about this monitor. If your monitor is displaying symptoms
that match those listed in the HELP OSD, follow the on-
screen instructions to resolve the problem. If the symptoms
do not match those listed in the HELP OSD or if the
problem persists, see “Troubleshooting” on page 16.
1
Press the button.
The MENU OSD appears.
2
Press the ./>buttons to select “ HELP” and press
the button again.
The HELP OSD appears.
3 Press the ./>buttons to select a HELP menu item
and press the button again.
Instructions or information to resolve the problem
appears on the screen. An explanation of each menu
item is given below.
RECOMMENDED RESOLUTION
If the picture does not fill the screen to the edges or if the
picture appears too large for the screen, adjust the
resolution to the figures shown in the OSD using your
computer. If the input signal matches one of this monitor’s
factory preset modes, the resolution and refresh rate of the
current input signal are displayed.
FLICKER
If the picture is flickering, adjust the refresh rate to figures
shown in the OSD. If the input signal matches one of this
monitor’s factory preset modes, the refresh rate of the
current input signal is displayed.
THIN HORIZONTAL LINE
The lines that appear on your screen are damper wires. See
page 14 for more information about the damper wires.
RETURN TO MA I N MENU
RECOMMENDED RESOLUT I ON
FLICKER
TH I N HOR I ZONTAL L I NE
DI STORTED SHAPE
OUT OF FOCUS
D I SCOLORAT I ON
HELP
DEGAUSS
ON
OPT ION
CONTROL
LOCK
OFF ON
OPT ION
13
Getting Started
F
EN
ES
C
Customizing Your Monitor
Resetting the Adjustments
Resetting an adjustment item
1
Press the and ./>buttons to select the OSD
containing the item you want to reset, and press the
button again.
2
Press the ./>buttons to select the item you want to
reset.
3 Press the ?(reset) button.
Resetting all of the adjustment data for
the current input signal
When there is no OSD displayed, press the ?(reset)
button.
All of the adjustment data for the current input signal is
reset to the factory settings.
Note that adjustment data not affected by changes in input
signal (OSD language , OSD position, and the control lock
function) is not reset to the factory settings.
Resetting all of the adjustment data for all
input signals
Press and hold the ?(reset) button for more than two
seconds.
All of the adjustment data, including the brightness and
contrast, is reset to the factory settings.
Note
The ?(reset) button does not function when (CONTROL
LOCK) is set to ON.
DISTORTED SHAPE
If the shape of the picture on the screen seems distorted, try
adjusting the picture’s geometry. Press the /button to
jump directly to the GEOMETRY OSD.
OUT OF FOCUS
The picture may seem to be out of focus when the red and
blue color signals are not aligned properly, causing red or
blue shadows to appear around letters and lines. Try
adjusting the picture’s convergence to make the shadows
disappear. Press the /button to jump directly to the
CONVERGENCE OSD. When the CONVERGENCE OSD is
displayed, the contrast, brightness, and moire adjustment
settings are automatically reset for all input signals.
DISCOLORATION
If the picture’s color appears abnormal in certain areas of
the screen, first check for any loose signal cables. After you
have checked the cables, try degaussing (demagnetizing)
the screen manually. Press the /button to jump directly to
the OPTION OSD, then select (DEGAUSS).
Press the button once to return to the MENU OSD, and
twice to return to normal viewing. If no buttons are pressed,
the OSD closes automatically after about 30 seconds.

1-7
14
Technical Features
Plug & Play
This monitor complies with the DDC1, DDC2B and DDC2Bi
Display Data Channel (DDC) standards of VESA.
When a DDC1 host system is connected, the monitor
synchronizes with the V. CLK in accordance with the VESA
standards and outputs the EDID (Extended Display
Identification Data) to the data line.
When a DDC2B or DDC2Bi host system is connected, the
monitor automatically switches to the appropriate standard.
Power Saving Function
This monitor meets the power-saving guidelines set by
VESA and
E NERGY
S TAR, as well as the more stringent
NUTEK .
If the monitor is connected to a computer or video graphics
board that is VESA DPMS (Display Power Management
Signaling) compliant, the monitor will automatically reduce
power consumption in three stages as shown below.
1
2
3
4
5
Recovery time
—
Approx. 5 sec.
Approx. 5 sec.
Approx. 15 sec.
—
uindicator
Green
Green and orange
alternate
Green and orange
alternate
Orange
Off
Power
consumption
≤130 W
≤15 W
≤15 W
≤3 W
≤0.5 W
Screen
active
blank
blank
blank
—
Horizontal
sync signal
present
absent
present
absent
—
Vertical
sync signal
present
present
absent
absent
—
Notes
• When your computer is in a power saving mode, MONITOR IS
IN POWER SAVE MODE appears on the screen if you press any
button on the monitor (page 15). After a few seconds, the
monitor enters the power saving mode again. Once the
horizontal and vertical sync signals are detected, the monitor
automatically resumes its normal operation mode.
• The power management feature is invoked when the computer
recognizes that you have not used your mouse or keyboard for a
user-definable period of time.
• IBM recommends that you switch off your monitor at the end of
each working day, or whenever you expect to leave it unused for
long periods during the day.
Damper Wires
When viewing a white background, very thin horizontal
lines may be visible on the screen as shown below. These
lines are the shadows of the damper wires and are
characteristic of CRTs that use aperture grilles. The wires
are attached to the aperture grille on the inside of the
Trinitron tube and prevent the vibration of the aperture
grille.
Damper wires
Power consumption
mode
Normal operation
Standby (1st mode)
Suspend (2nd mode)
(sleep)*
Active-off (3rd mode)
(deep sleep)*
Power-off
* “Sleep” and “deep sleep” are power saving modes defined by the Environmental Protection Agency.
15
Getting Started
F
EN
ES
C
Technical Features
Preset Modes
No.
1
2
3
4
5
6
7
8
9
10
Resolution
(dots ×lines)
640 ×480
640 ×480
640 ×480
800 ×600
800 ×600
1024 ×768
1024 ×768
1280 ×1024
1280 ×1024
1600 ×1200
Horizontal
Frequency
31.5 kHz
37.5 kHz
43.3 kHz
46.9 kHz
53.7 kHz
60.0 kHz
68.7 kHz
80.0 kHz
91.1 kHz
93.8 kHz
Vertical
Frequency
60 Hz
75 Hz
85 Hz
75 Hz
85 Hz
75 Hz
85 Hz
75 Hz
85 Hz
75 Hz
Graphics
Mode
VGA
VESA
VESA
VESA
VESA
VESA
VESA
VESA
VESA
VESA
Displaying the Monitor’s
Information
You can display the model name, serial number and year of
manufacture using the monitor‘s INFORMATION OSD.
Press and hold the button for 5 seconds.
The INFORMATION OSD appears.
Example:
The INFORMATION OSD includes the model name, serial
number, and manufactured year.
The OSD automatically disappears after about 30 seconds.
MODE L : I BM P 7 6
SER NO:12-34567
MANUFACTURED : 1999 - 5 2
INFORMATION
Warning Messages
If no pictures appears on the screen, one of the following
messages appears on the screen.
MONITOR IS WORKING or MONITOR IS IN POWER
SAVE MODE appears in the row 1.
If MONITOR IS WORKING appears on the screen
1The monitor’s condition
MONITOR IS WORKING
This indicates that the monitor is working properly.
2The input signal condition and the remedies
CHECK SIGNAL CABLE
This indicates that no signal is input. Check that the
video signal cable is properly connected and all plugs
are firmly seated in their sockets.
OUT OF SCAN RANGE and CHANGE PC SETTING
These indicate that the input signal is not supported by
the monitor’s specifications. Check that the video
frequency range is within that specified for the monitor.
(Horizontal: 30 – 94 kHz, Vertical: 48 –120 Hz)
If MONITOR IS IN POWER SAVE MODE appears on the
screen
1The monitor’s condition
MONITOR IS IN POWER SAVE MODE
This indicates that the computer is in power saving
mode. This message is displayed only when your
computer is in a power saving mode and you press any
of the buttons on the monitor.
2The remedies
ACTIVATE USING PC
Try pressing any key on the computer keyboard or
moving the mouse, and confirm that your computer’s
graphic board is completely seated in the correct bus
slot.
For more information, see “Troubleshooting” on page 16.
MON I TOR I S WORK I NG
OUT OF SCAN RANGE
CHANGE PC SETT I NG
INFORMATION
Technical Features Additional Information

1-8
16
Additional Information
Troubleshooting
This section may help you isolate the cause of a problem and as a result, eliminate the need to contact technical support.
Symptom Check these items
No picture
If the uindicator is not lit
If the “CHECK SIGNAL
CABLE” message appears on
the screen, or if the u
indicator is either orange or
alternating between green and
orange
If the “MONITOR IS IN
POWER SAVE MODE”
message appears on the
screen, or if the uindicator is
either orange or alternating
between green and orange
If the “OUT OF SCAN
RANGE” message appears on
the screen
If no message is displayed
and the uindicator is green
or flashing orange
Picture is scrambled
Color is not uniform
You cannot adjust the
monitor with the buttons on
the front panel
• Check that the power cord is properly connected.
• Check that the u(power) switch is in the “on” position.
• Check that your computer 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.
• Ensure that no pins are bent or pushed in the video input connector.
• Check that the graphic board is completely seated in the proper bus slot.
• The computer is in power saving mode. Try pressing any key on the computer
keyboard, or moving the mouse.
• Check that your computer power switch is in the “on” position.
• Check that the graphic board is completely seated in the proper bus slot.
• Check that the video frequency range is within that specified for the monitor.
(Horizontal: 30 – 94 kHz, Vertical: 48 – 120 Hz)
Refer to your computer’s instruction manual to adjust the video frequency range.
• If you are using a video signal cable adapter, check that it is the correct one.
• See “Self-diagnosis Function” (page 18).
• Check your graphics board manual for the proper monitor setting.
• Check this manual and confirm that the graphics mode and the frequency you are
trying to operate at is supported. Even if the frequency is within the proper range,
some graphic boards may have a sync pulse that is too narrow for the monitor to sync
correctly.
• Degauss the monitor (page 10).
If you place equipment which generates a magnetic field, such as a loudspeaker, near
the monitor, or you change the direction of the monitor, color may lose uniformity.
The degauss function demagnetizes the metal frame of the CRT to obtain a neutral
field for uniform color reproduction. If a second degauss cycle is needed, allow a
minimum interval of 20 minutes for the best result.
• If the control lock function is set to ON, set it to OFF using the OPTION OSD
(page␣12).
Additional Information
17
Getting Started
F
EN
ES
C
Additional Information
Additional Information
Symptom Check these items
Screen image is not centered
or sized properly
Edges of the image are
curved
White lines show red or blue
shadows at edges
Picture is fuzzy
Picture bounces or has wavy
oscillations
Picture is flickering
Picture appears to be
ghosting
Wavy or elliptical (moire)
pattern is visible
Two fine horizontal lines
(wires) are visible
Hum is heard right after the
power is turned on
• Adjust the size or centering (page 6).
Some video modes do not fill the screen to the edges. This problem tends to occur with
certain graphic boards.
• Adjust the geometry (page 7).
• Adjust the convergence (page 9).
• Adjust the contrast and brightness (page 5).
• Degauss the monitor (page 10).
If you place equipment which generates a magnetic field, such as a loudspeaker, near
the monitor, or you change the direction of the monitor, color may lose uniformity.
The degauss function demagnetizes the metal frame of the CRT to obtain a neutral
field for uniform color reproduction. If a second degauss cycle is needed, allow a
minimum interval of 20 minutes for the best result.
• If red or blue shadows appear along the edges of images, adjust the convergence
(page␣9).
• Select MOIRE ADJUST and adjust the moire cancellation effect (page 11).
• Isolate and eliminate any potential sources of electric or magnetic fields. Common
causes for this symptom are electric fans, fluorescent lighting, or laser printers.
• If you have another monitor close to this monitor, increase the distance between them
to reduce the interference.
• Try plugging the monitor into a different AC outlet, preferably on a different circuit.
• Try the monitor on a different computer in a different room.
• Set the refresh rate on the computer to obtain the best possible picture by referring to
your computer’s manual.
• Eliminate the use of video cable extensions and/or video switch boxes if this symptom
occurs. Excessive cable length or a weak connection can produce this symptom.
• Select MOIRE ADJUST and adjust the moire cancellation effect (page 11).
The moire may be modified depending on the connected computer.
• Due to the relationship between resolution, monitor dot pitch and the pitch of some
image patterns, certain screen backgrounds sometimes show moire. Change your
desktop pattern.
• These wires stabilize the vertically striped aperture grille (page 14). This aperture grille
allows more light to pass through to the screen giving the Trinitron CRT more color
and brightness.
• When the power is turned on, the auto-degauss cycle is activated. While the auto-
degauss cycle is activated, a hum may be heard. The same hum is heard when the
monitor is manually degaussed. This is not a malfunction.
• If the problem persists, call the IBM HelpCenter.
In the US. call 1-800-772-2227
In Canada call 1-800-565-3344
• Note the model name and the serial number of your monitor. Also note the make and name of your computer and graphic
board.

1-9
18
Additional Information
Specifications
Picture tube 0.24 mm aperture grille pitch
17 inches measured diagonally
90-degree deflection
Viewable image size Approx. 327 ×243 mm (w/h)
(12
7
/ 8 ×9
5
/ 8 inches)
16.0” viewable diagonal
Resolution Horizontal: Max. 1600 dots
Vertical: Max. 1200 lines
Standard image area Approx. 312 ×234 mm (w/h)
(12
3
/ 8 ×9
1
/ 4 inches)
Deflection frequency Horizontal: 30 to 94 kHz
Vertical: 48 to 120 Hz
300 <Total Line <1700
AC input voltage/current
100 to 240 V, 50 – 60 Hz, Max. 1.7 A
Power consumption Max. 130 W
Dimensions Approx. 406 ×416 ×431 mm
(w/h/d)
(16 ×16
1
/
2 ×17 inches)
Mass Approx. 20 kg (44 lb 1 oz)
* Recommended horizontal and vertical timing condition
• Horizontal sync width should be more than 1.0 µsec.
• Horizontal blanking width should be more than
3.0␣µsec.
• Vertical blanking width should be more than 500 µsec.
Design and specifications are subject to change without
notice.
Self-diagnosis Function
This monitor is equipped with a self-diagnosis function. If
there is a problem with your monitor or computer, the
screen will go blank and the uindicator will either light up
green or flash orange.
If the uindicator is green
1 Disconnect the video input cable or turn off the
connected computer.
2 Press the ubutton twice to turn the monitor off and
then on.
3 Press and hold the /button for 2 seconds before
the monitor enters power saving mode.
If all four color bars appear (white, red, green, blue), the
monitor is working properly. Reconnect the video input
cable and check the condition of your computer.
If the color bars do not appear, there is a potential monitor
failure. Inform the IBM HelpCenter of the monitor’s
condition.
If the uindicator is flashing orange
Press the ubutton twice to turn the monitor off and
then on.
If the uindicator lights up green, the monitor is working
properly.
If the uindicator is still flashing, there is a potential
monitor failure. Inform the IBM HelpCenter of the monitor’s
condition. Be sure to note the model name and serial
number of your monitor. Also note the make and model of
your computer and video board.
uindicator

6550-23N/23S/33N/63N/63S/73N SECTION 2
DISASSEMBLY
2-1. CABINET AND EMI SHIELD REMOVAL
2-1
5
Four screws
(+BVTT 3 x 8)
6
Three screws
(+BVTT 3 x 8)
3
Four screws
(+BVTP 4 x 16)
7
Release from four claws after slide EMI shield
to direction of arrows.
1
Two screw covers
(UR and LR)
2
Two screw covers
(UL and LL)
Claw
Claw
8
EMI shield
4
Cabinet

6550-23N/23S/33N/63N/63S/73N
2-2. A AND D BOARDS REMOVAL
2-3. SERVICE POSITION
2-2
1
Screw
(+BVTT 3 x 8)
CN601
GND
GND
6
Three screws
(+BVTT 3 x 12)
7
Four screws
(Washer head +P 3 x 8)
2
Cable stopper
5
A board
8
D board
3
Cable cover
4
Cable holder
1
2
A board
D board
3
(Note) The electric potential of heat sink of IC401 is not GND.
So please do not touch it absolutely to the base chassis
and etc., which make an ultimate cause of the bad move-
ment or break.

6550-23N/23S/33N/63N/63S/73N
2-4. PICTURE TUBE REMOVAL
3When one side of the rubber cap is
separated from the anode button, the
anode-cap can be removed by turning
up the rubber cap and pulling up it in
the direction of the arrow c.
• HOW TO HANDLE AN ANODE-CAP
1Don’t scratch the surface of anode-caps with shartp shaped mate-
rial!
2Don’t press the rubber hardly not to damege inside of anode-caps!
A material fitting called as shatter-hook terminal is built in the
rubber.
3Don’t turn the foot of rubber over hardly!
The shatter-hook terminal will stick out or damage the rubber.
a
b
Anode Button
c
• REMOVAL OF ANODE-CAP
NOTE: 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.
• REMOVING PROCEDURES
1Turn up one side of the rubber cap in
the direction indicated by the arrow a.2Using a thumb pull up the rubber cap firmly in the direction indicated by the
arrow b.
2-3
6
Two screws
(+BVTP 4 x 16)
8
Base assembly
7
Two screws
(+BVTT 4 x 8)
3
Screw
(+BVTT 4 x 8)
4
Two claws
5
Stand assembly
9
Four screws
(Tapping screw 5)
14
Deflection yoke
13
Neck assembly
11
Degaussing coil assembly
2
A board
12
Two extention coils
1
Anode cap
15
Two degaussing coil holders
16
Two degaussing coil holder
10
Picture tube
Bezel assembly
Cushion
8 pin
2 pin
CN2
CN601
CN303
GND

6550-23N/23S/33N/63N/63S/73N
2-4
MEMO
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6550-23N/23S/33N/63N/63S/73N SECTION 3
SAFETY RELATED ADJUSTMENT
Part Replaced ([)
RV501HV ADJ
When replacing or repairing the shown below table, the
following operational checks must be performed as a
safety precaution against X-rays emissions from the unit.
•HV Protector Circuit Check
Using an external DC Power Supply, apply the voltage
shown below between cathode of D517 on D board and
GND, and confirm that the HV HOLD DOWN circuite
works. (TV Rester disappears)
Standard voltage : 35.80 +0.00 V DC
Check Condition
• Input voltage : 120 ±2 V AC
• Input signal : Cross hatch (White lines on Black
back ground) at 68.7kHz / 85Hz
(Mode 7)
• Beam control : CONT : 0 (min), BRT : 0 (min)
•Beam Current Protector Check
An ammeter in series between FBT pin !] on D board
and GND, then, decrease gradually the resistance of the
variable resistor from maximum to minimum, and con-
firm that the Beam Current Protector Circuite works
(TV Rester disappears). The current must be within the
range shown below.
• Standard current : 1.55 +0.00 mA
Check Condition
• Input voltage : 120 ±2 V AC
• Input signal : Cross hatch (Black lines on white) at
31.5kHz / 60Hz (Mode 1)
• Beam control : CONT : 0 (min), BRT : 0 (min)
•B+ Voltage Check
Standard voltage : 179.0 ±3.0 V DC
Check Condition
• Input voltage : 120 V AC
Note : Use NF power supply or make sure that
distortion factor is 3% or less.
• Input signal : Cross hatch (White lines on black) at
68.7 kHz / 85Hz (Mode 7)
• Beam control : CONT : 255 (max), BRT : 255 (max)
HV Regulator
Circuit Check
HV Protector
Circuit Check
Beam Current
Protector Circuit
Check
Part Replaced (])
D board IC501, C532, C534,
C539, C553, C554,
C555, C556, C558,
C561, R540, R541,
R542, R544, R564,
R567, R568, RV501,
T501 (FBT)
D board IC607, IC901, D515,
D517, C540, C542,
C544, R510, R543
R547, R549, R552,
R595,
T501 (FBT)
D board IC605, IC607, IC901,
C535, C541, R545,
R546, R548, R550,
R596, R934,
T501 (FBT)
*Confirm one minute later turning on the power.
3-1
-0.10
-0.10

6550-23N/23S/33N/63N/63S/73N
4-1
SECTION 4
ADJUSTMENTS
•Landing Rough Adjustment
1. Enter the full white signal. (or the full black dots signal)
2. Set the contrast to “CONT”=MAX.
3. Make the screen monogreen.
Note: Off the outputs from R ch and B ch of SG.
4. Reverse the DY, and adjust coarsely the purity magnet so
that a green raster positions in the center of screen.
5. Moving the DY forward, adjust so that an entire screen be-
comes monogreen.
6. Adjust the tilt of DY, and fix lightly with a clamp.
Note: "TILT" shall be set at 0
•Landing Fine Adjustment
1. Put the set inside the Helmholtz coil.
2. Input the single green signal.
3. Demagnetize the CRT surface with the hand degausser , and
perform auto degaussing.
4. Attach the wobbling coil to the designated part of the CRT
neck.
5. Attach the sensor of the landing adjustment unit on the CRT
surface.
a
b
cd
Signal : Inverted crosshatch (Make the monogreen)
L/D control specification
±5 ±7 ±5
±5 ±7 ±5
±5 ±7 ±5
B
R
B
R
A
B
R
B
R
B
A1
B1
“A” and “B”,
“A1” and “B1”
must be equal.
Purity Magnet <<Zero Position>>
IBM AT Computer
as a Jig
1-690-391-21
1A-1500-819-A
Interface Unit
2
*The parts above ( ) are necessary for DAS adjustment.
13
D-sub
(9 Pin [female]) mini Din (8Pin) 4 Pin
3-702-691-01
Connector Attachment
3
To BUS CONNECTOR
4 Pin 4 Pin
Connect the communication cable of the computer to the connector located on the D board on the monitor. Run the service software
and then follow the instruction.
Purity magnet position
6. Adjust the DY position and purity, and the DY tilt.
7. Fasten DY with screw.
Note: Torque 22 ±2kgcm (2.2 ±0.2 Nm)
Perform auto degaussing.
8. Adjust each top and bottom pins by two wedges and then not
swing DY neck right and left. Adjust H. Trap to become
horizontal trapezoid(c = d).
(When fixing DY with wedges, insert wedges completely so
that the DY does not shake.)
“a” and “b” must be equal, and
“c” and “d” must be equal.
<How to drive in wedges>
9. If the L/D is not within the standards adjust purity magnet
and in front and behind of DY to satisfy L/D adjustment
standards. If the corner is not within the standards, adjust
disc magnet to satisfy L/D adjustment standards.
Note:
(1) When necessary to paste magnets more than 2 pieces, be
careful that the convergence and the distortion would be al-
terable.
(2) Paste within 80 to 120 mm from the DY on the diagonal line
of the magnet.
10. If using the magnet, be sure to demagnetize with the de-
gausser and check.
11. Remove the sensor and wobbling coil.
12. Check that the DY is not tilting.

6550-23N/23S/33N/63N/63S/73N
4-2
A312 mm
B
MODE All mode
234 mm
a 1.8 mm
b 1.8 mm
aB
Ab
B
AA0.20 mm
B
MODE All mode
0.24 mm
•Convergence Rough Adjustment
1. Enter the white crosshatch signal (white lines on black).
2. Adjust roughly the horizontal and vertical convergence at
four-pole magnet.
3. Adjust roughly HMC and VMC at six-pole magnet.
•Convergence Adjustment
Static convergence
1. Receive the crosshatch of R and B.
2. Recieve H. STAT and V. STAT by 4 pole magnet.
3. Recieve the white crosshatch signal.
4. Recieve HMC and VMC by 6 pole magnet.
5. Recieve the crosshatch of R and B.
Note: Adjust H. STAT and V. STAT in the beggining by 4 pole
magnet not adjuust them by register immediately.
6. Insert to TLH correction board and correct H. TILT.
7. Correct XCV by XCV core.
8. Correct V. TILT bu TLV-VR.
9. Adjust Y cross by YCH-VR.
10. Correct to get the most suitable convergence pattern.
When necessary, adjust above mentioned from step 1 to step
10 reiterate.
11. Paint lock TLH corection board, neck assy 4 and 6 pole
magnet.
•Convergence Specification
•White Balance Adjustment Specification
(1) 9300K
x = 0.283 ±0.005
y = 0.298 ±0.005
(2) 5000K
x = 0.346 ±0.005
y = 0.359 ±0.005
•Vertical and Horizontal Position and Size
Specification
•Focus adjustment
Adjust the focus volume 1 and 2 for the optimum focus.
Standard: HMC, VMC ±0.1 mm (In the center of screen)
B
RRB
R
B
B
R
R B B R
XCV YCH
TLV TLH
Purity Mg
4-pole Mg
6-pole Mg
XCV
YCH
H-Trap
TLH
TLV
4 Pole 6 Pole
<<Neck Assy's Zero Position>>
FBT
Focus volume 1 (V)
Focus volume 2 (H)
Purity