Dell D1626HT - UltraScan 1600HS - 21" CRT Display User manual

CHASSIS
SERVICE MANUAL
SPECIFICATIONS
US Model
Canadian Model
AEP Model
EQ Model
SH Model
J Model
Chassis No. SCC-L04K-A
D1626HT
R
COLOR MONITOR
N3
Picture tube 0.25 - 0.27 mm aperture grill pitch,
21 inches measured diagonally,
90 degree deflection
Phosphor Type P22
Transmission Ratio Approx. 39%
Faceplate Anti Reflective (AR)/Anti Static (AS)
coating
Viewable image size Approx. 403.8 ×302.2 mm (w/h)
(16 ×12 in.) 19.8” viewing image
Resolution
Horizontal Max. 1600 dots
Vertical Max. 1200 lines
Display picture size Approx. 388 ×291 mm (w/h)
(15 3/8×11 1/2in.)
or
Approx. 364 ×291 mm (w/h)
(14 3/8×11 1/2in.)
Input signal
Video Analog RGB (75 Ωtypical)
0.7 Vp-p, Positive
Sync External HD/VD, Composite
Polarity Free TTL
Video Composite (Sync on green)
0.3 Vp-p, Negative
Deflection frequency
Horizontal 30 to 107 kHz
Vertical 48 to 160 Hz
AC input voltage/current 100 to 240 V, 50 – 60 Hz, 2.0 – 1.0 A
Inrush current 120 VAC/50 A
240 VAC/80 A
Power consumption
Maximum 160 W
Nominal 120 W, 409 BTU/h
Dimensions 498 ×505 ×474 mm (w/h/d)
(19 5/8×20 ×18 3/4in.)
Net weight Approx. 31 kg (68 lb 5 oz)
Shipping weight 37 kg (81 lb 9 oz)
Environmental Temperature
Operating 10˚ to 40˚ C (50˚ to 104˚ F)
Non-operating 0˚ to 60˚ C (32˚ to 140˚ F)
Environmental Humidity
Operating 10% to 80% (Non-condensing)
Non-operating 5% to 90% (Non-condensing)
Design and specifications are subject to change without notice.

D1626HT
– 2 –
SAFETY CHECK-OUT
(US Model only)
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
microampers).
Leakage current can be measured by any one of three meth-
ods.
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 ex-
amples of a passive VOMs that are suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able. (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 COMPO-
NENTS ARE REPLACED OR IMPROPER OPERATION
IS SUSPECTED.
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 CRITIQUES, OU LORSQU’UN
MAUVAIS FONCTIONNE-MENT 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 transis-
tors, 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 recom-
mend 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.
1.5 k Ω 0.15 µ FAC
Voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
CAUTION ON DAS (ECS) CONNECTOR
•The connector for DAS (ECS) adjustment is provided inside the
cover shown below. Be careful with an electrical shock when
connecting the connector with the power supplied. Also, return
the removed cover to the home position.
Rear side

D1626HT
– 3 –
MODE AT PRODUCTION MODE 1 MODE 2 MODE 3 MODE 4 MODE 5
MODE FOR CUSTOMER VESA VESA VESA VESA VESA
RESOLUTION 1024 X 768 1024 X 768 1280 X 1024 1280 X 1024 1600 X 1200
CLOCK 78.750 MHz 94.500 MHz 135.000 MHz 157.500 MHz 229.500 MHz
— HORIZONTAL —
H-FREQ 60.023 kHz 68.677 kHz 79.976 kHz 91.146 kHz 106.250 kHz
usec usec usec usec usec
H. TOTAL 16.66 14.561 12.504 10.971 9.412
H. BLK 3.657 3.725 3.022 2.844 2.44
H. FP 0.203 0.508 0.119 0.406 0.279
H. SYNC 1.219 1.016 1.067 1.016 0.837
H. BP 2.235 2.201 1.837 1.422 1.325
H. ACTIV 13.003 10.836 9.481 8.127 6.972
— VERTICAL —
V. FREQ(HZ) 75.029 Hz 84.997 Hz 75.025 Hz 85.024 Hz 85.000 Hz
lines lines lines lines lines
V. TOTAL 800 808 1066 1072 1250
V. BLK 32 40 42 48 50
V.FP 1 1111
V. SYNC 3 3333
V. BP 28 36 38 44 46
V. ACTIV 768 768 1024 1024 1200
— SYNC —
INT(G) NO NO NO NO NO
EXT(H/V)/POLARITY YES P/P YES P/P YES P/P YES P/P YES P/P
EXT(CS) /POLARITY NO NO NO NO NO
INT/NON INT NON INT NON INT NON INT NON INT NON INT
POWER SAVING FUNCTION
This monitor has three Power Saving modes. By sensing the absence of a
video signal from the computer, it reduces power consumption as follows.
Power
consumption
≤160 W
≤100 W
≤15 W
≤5 W
0 W
—
Recovery
time
—
Approx.
3 sec.
Approx.
3 sec.
Approx.
10 sec.
—
—
uindicator
Green
Green and orange
alternate
Green and orange
alternate
Orange
Off
Orange flashing
Power
consumption
mode
Normal
operation
Standby
(1st mode)
Suspend
(2nd mode)
Active-off
(3rd mode)
Power-off
Failure mode
1
2
3
4
5
6
Failre
+B failure
Horizontal / Vertical Deflection failure,
Thermal protector
ABL protector
HV failure
Aging / Self Test
Power LED
Yellow →Off
(0.5 sec) (0.5 sec)
Yellow →Off
(1.5 sec) (0.5 sec)
Yellow →Off
(0.5 sec) (1.5 sec)
Yellow →Off →Yellow →Off
(0.25 sec) (0.5 sec) (0.25 sec) (1.25 sec)
Yellow →Off →Green →Off
(0.5 sec) (0.5 sec) (0.5 sec) (0.5 sec)
Aging Mode (Video Aging) : During Power Save, press “MENU” key for longer than 2 second.
Self Test (OSD Color Bar) : During Power Save, press “CONTRAST” + (>) key for longer than 2 second.
Reliability Check Mode : During Power Save, press “CONTRAST” – (.) key for longer than 2 second.
DIAGNOSIS
TIMING SPECIFICATION
Note
If no video signal is input to the monitor, the “NO INPUT SIGNAL”
message appears (page 13). After about 60 seconds, the Power Saving
function automatically puts the monitor into
Active-off mode and the uindicator lights up orange. Once the monitor
detects horizontal and vertical sync signals, the monitor automatically
resumes normal operation mode.
97.10.29 VER.

D1626HT
– 4 –
Note: Hand degauss must be used on stand-by or power-off condition.
This model has an automatic earth magnetism correction function by using an earth
magnetism sensor and a LCC coil. When using a hand degauss while monitor (LCC
coil) is being operated, it sometimes gets magnetized, and the system may not work
properly as a result.
TABLE OF CONTENTS
Section Title Page
1. GENERAL................................................................... 5
2. DISASSEMBLY
2-1. Cabinet Removal .................................................. 13
2-2. D Board Removal ................................................ 13
2-3. G Board Removal ................................................ 14
2-4. A Board Removal ................................................ 14
2-5. L Board Removal ................................................. 15
2-6. I/O TERMINAL Board Removal ......................... 15
2-7. Service Position .................................................... 16
2-8. H and J Boards Removal ..................................... 16
2-9. Picture Tube Removal ......................................... 17
3. SAFETY RELATED ADJUSTMENT ............ 18
4. ADJUSTMENTS ...................................................... 19
5. DIAGRAMS
5-1. Block Diagrams .................................................... 21
5-2. Frame Shcematic Diagram.................................... 27
5-3. Circuit Boards Location........................................ 29
5-4. Schematic Diagrams and Printed Wiring Boards..... 29
(1) Schematic Diagram of D Board ........................... 33
(2) Schematic Diagrams of G, GA, H, J
and L Boards ........................................................ 37
(3) Schematic Diagram of A Board ........................... 44
5-5. Semiconductors .................................................... 49
6. EXPLODED VIEWS
6-1. Chassis ................................................................. 51
6-2. Picture Tube ......................................................... 52
6-3. Packing Materials ................................................ 53
7. ELECTRICAL PARTS LIST ............................ 54

– 5 –
SECTION 1
GENERAL
The operating instructions mentioned here are partial abstracts from the Operating Instruction Manual. The page numbers of the Operating Instruction Manual remain as in the manual.
5
Getting Started
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Video Input 1 Connector (HD15)
Pin No. Signal
1 Red
2 Green (Composite
Sync on Green)
3 Blue
4 ID (ground)
5 DDC Ground*
6 Red Ground
7 Green Ground
Pin No. Signal
8 Blue Ground
9 DDC +5V*
10 Ground
11 ID (ground)
12 SDA
(serial data)
13 Horizontal Sync
14 Vertical Sync
15 SCL
(serial clock)
Use of the Tilt/Swivel
With the tilt/swivel, you can adjust this monitor to any desired
angle within 180° horizontally and 20° vertically.
To turn the monitor vertically and horizontally, hold it at the
bottom with both hands as shown below.
Parts and Controls
Rear
1(RESET) button (pages 7 and 11)
Resets the adjustments to the factory settings.
2(AUTO SIZING AND CENTERING) button
(page 6)
Automatically adjusts the size and centering of the
images.
3¨(BRIGHTNESS) ./>buttons (page 6)
Adjust the picture brightness.
Operate as the ./>buttons when adjusting other
items.
4(MENU) button (page 7)
Displays the MENU OSD.
5>(CONTRAST) ?//buttons (page 6)
Adjust the contrast.
Operate as the ?//buttons when adjusting other items.
6u(POWER) switch and indicator (page 12)
Turns the monitor on and off.
The indicator lights up green when the monitor is on,
and lights up orange when the monitor is in Power
Saving mode.
7AC IN connector
Provides AC power to the monitor.
8Video input 1 connector (HD15)
Inputs RGB video signals and SYNC signals
9Video input 2 connector (5 BNC)
Inputs RGB video signals (0.7 Vp-p, positive) and SYNC
signals.
Front
Getting Started
15°
90°
90°
5°
* Display Data Channel (DDC) standard of VESA.

5 4 3 2 1678910 1112131415









– 6 –
6
Customizing Your Monitor
Adjusting the Picture Brightness
and Contrast
1 Press the¨(BRIGHTNESS)./>or
>(CONTRAST)?//buttons.
The BRIGHTNESS/CONTRAST OSD appears.
Automatic Sizing and
Centering of the Picture
You can easily adjust the size and centering of the picture so it
fills the screen by pressing the button.
1 Turn on the monitor and computer.
2 Press the button.
The picture fills the screen.
Input Signal Selection
This monitor has two signal input terminals (HD15 and
5 BNC) and can be connected to two computers. When the
power of both computers is on, manually select the input signal
you want to view as follows.
1 Turn on the monitor and both computers.
2 Press the MENU button to display the MENU OSD.
3 HighlighttheOPTIONOSDusingtheBRIGHTNESSand
CONTRAST buttons and press the MENU button again.
ON
MANUAL DEGAUSS
UNLOCK
1 MIN
OPTION
ZZ...
1
ZZ...
INPUT
1 MIN
OPTION
UNLOCK
2
Horizontal
frequency Vertical frequency
2 To adjust the brightness
Press the ¨(BRIGHTNESS) ./>buttons.
To adjust the contrast
Press the >(CONTRAST) ?//buttons.
Notes
• This function is intended for use with a computer running
Windows or similar graphic user interface software that
provides a full-screen picture. It may not work properly if the
background color is dark or if the input picture does not fill the
screen to the edges (such as an MS-DOS prompt).
• The screen may go blank for a few seconds while performing the
Sizing and Centering function. This is not a malfunction.
• Although a picture with an aspect ratio of 5:4 (resolution: 1280 ×
1024) does not fill the screen to the edges, the picture is
accurately displayed.
4 Pressthe¨(BRIGHTNESS)./>buttonstoselect
(INPUT).
5 Pressthe >(CONTRAST) ?//buttonstoselect
“1” or “2.”
When you select “1”
The monitor displays the signal from the computer
connected to the HD15 terminal.
When you select “2”
The monitor displays the signal from the computer
connected to the 5 BNC terminals.
When you connect computers to both terminals
If you restart the computer you are viewing, or that computer
goes into power saving mode, the monitor may automatically
switch to the signal from the other computer. This is because
the monitor automatically switches from an interrupted signal
to a constant signal. If this happens, manually select the
computer signal you want to view.
BRIGHTNESS/CONTRAST
26 26
80.0kHz/ 75Hz

– 7 –
7
Getting Started
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The OSD (On-screen Display) System
Introducing the OSD System
You can adjust most of the monitor’s settings using the OSDs
(On-screen Display). All of the OSDs numbered 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) ./>and >(CONTRAST)
?//buttons to highlight menu items and to adjust
settings.
To adjust the monitor settings:
1Press the MENU button to display the MENU OSD.
2Highlight the desired OSD using the BRIGHTNESS and
CONTRAST buttons and press the MENU button again.
3If necessary, use the BRIGHTNESS buttons to select a
specific item.
4Adjust 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.
5When 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 11.
• The OSD automatically disappears after 30 seconds.
COLOR CENTER SCREEN
GEOMETRY ZOOM
LANGUAGE OPTIONSIZE
Customizing Your Monitor
MENU
EXIT
CENTER
SIZE
GEOM
COLOR
LANG
ZOOM
SCREEN
OPTION
OK
MENU
SIZE
26
73
CENTER
26
73
ZOOM
73V 66H
ROTATION
GEOMETRY
26
ENGLISH
FRANÇAIS
DEUTSCH
ESPAÑOL
ITALIANO
LANGUAGE
COLOR
OPTION
SCREEN
R BIAS
5000K 6500K 50
G BIAS 50
B BIAS 50
R GAIN 50
G GAIN 50
B GAIN 50
9300K
TOP
BOT
H CONVERGENCE
26
ADJ
ON
MANUAL DEGAUSS
UNLOCK
1 MIN
ZZ...

– 8 –
8
Select
H CONVERGENCE
V CONVERGENCE
TOP
V CONVER TOP
BOT
V CONVER BOTTOM
LANDING
ADJ
LANDING ADJUST
CANCEL MOIRE
*
MOIRE ADJUST
3Using the SCREEN OSD
You can adjust the convergence and landing of the picture and
cancel the picture’s moire using the SCREEN OSD.
Convergence is the alignment of the Red, Green and Blue
electron beams on the screen. When convergence is not aligned,
red or blue shadows may be noticeable (especially with text)
which can affect the clarity or focus of the image.
Landing is used to correct color imbalances at the four corners
of the screen due to influence from the earth’s magnetism.
Moire is a wavy or elliptical pattern which may appear on the
screen. The moire cancel adjustment is provided to eliminate
moire.
The CANCEL MOIRE setting is stored in memory for the
current input signal. All other settings are stored in memory for
all input signals.
1 Press the MENU button to display the MENU OSD.
2 Highlight the SCREEN OSD using the BRIGHTNESS and
CONTRAST buttons and press the MENU button again.
3 Press the ¨(BRIGHTNESS) ./>buttons to select the
desired adjustment item.
4 Press the >(CONTRAST) ?//buttons to adjust the item.
5 Press the MENU button once to return to the MENU OSD,
or press it twice to return to normal viewing.
To
adjust the horizontal convergence
adjust the vertical convergence
adjust the screen’s upper vertical
convergence
adjust the screen’s lower vertical
convergence
select one of the four corners that
needs color correction due to
influence from the earth’s magnetism
correct the color at one of the four
corners of the screen
eliminate elliptical or wavy lines on
the screen
adjust the degree of moire
cancellation
* CANCEL MOIRE must be “ON” for “ (MOIRE ADJUST)” to
appear on the screen.
Adjusting the Settings
1Using the COLOR OSD
You can adjust the monitor’s color temperature using the
COLOR OSD. For example, you can adjust the monitor to
match the colors of a printed picture.
You can adjust the color temperature from 9300K (blue-white)
to 5000K (warm red).
This setting is stored in memory for all input signals.
1 Press the MENU button to display the MENU OSD.
2 Highlight the COLOR OSD using the BRIGHTNESS and
CONTRAST buttons and press the MENU button again.
3 Press the ?//buttons to select the color temperature.
There are three color temperature modes in the OSD.
The preset adjustments are: 5000K, 6500K and 9300K.
Fine tuning the color temperature
Press the ./>buttons to select an item and adjust the item by
pressing the ?//buttons.
Select R(red), G(green), or B(blue) BIAS to adjust the black
level of each color’s signal.
Select R(red), G(green), or B(blue) GAIN to adjust the white
level of each color’s signal.
The “5000K,” “6500K” or “9300K” indication changes and the
new color settings are stored in memory for each of the three
color modes.
The color temperature mode indications change as follows:
5000K n1, 6500K n2, 9300K n3
4 Press the MENU button once to return to the MENU OSD,
or press it twice to return to normal viewing.
2Using the CENTER OSD
You can adjust the picture centering using the CENTER OSD.
This setting is stored in memory for the current input signal.
1 Press the MENU button to display the MENU OSD.
2 Highlight the CENTER OSD using the BRIGHTNESS and
CONTRAST buttons and press the MENU button again.
3 To adjust vertical centering, press the ¨(BRIGHTNESS)
./>buttons.
4 To adjust horizontal centering, press the >(CONTRAST)
?//buttons.
5 Press the MENU button once to return to the MENU OSD,
or press it twice to return to normal viewing.
Customizing Your Monitor

– 9 –
9
Getting Started
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Customizing Your Monitor
4Using the ZOOM OSD
You can enlarge or reduce the picture size using the ZOOM
OSD.
This setting is stored in memory for the current input signal.
1 Press the MENU button to display the MENU OSD.
2 Highlight the ZOOM OSD using the BRIGHTNESS and
CONTRAST buttons and press the MENU button again.
3 Press the >(CONTRAST) ?//buttons to enlarge or
reduce the picture size.
4 Press the MENU button once to return to the MENU OSD,
or press it twice to return to normal viewing.
Note
You can enlarge or reduce the picture size until either the
horizontal or vertical size reaches its maximum or minimum
value.
5Using the OPTION OSD
You can manually degauss (demagnetize) the CRT, select the
input signal, move the OSD position, set the Power Saving
delay time, and lock the user controls using the OPTION OSD.
1 Press the MENU button to display the MENU OSD.
2 Highlight the OPTION OSD using the BRIGHTNESS and
CONTRAST buttons and press the MENU button again.
3 Press the ¨(BRIGHTNESS) ./>buttons to select the
desired adjustment item.
4 Press the >(CONTRAST) ?//buttons to activate the
manual degauss, select the input signal, move the OSD
position, change the Power Saving delay time or lock the
user controls.
5 Press the MENU button once to return to the MENU OSD,
or press it twice to return to normal viewing.
Degauss: If a second degauss cycle is needed, allow a minimum
interval of 20 minutes for the best result.
Input Signal Selection: Select the desired input signal when
two computers are connected.
OSD Position Change: To change the OSD position, press the
¨(BRIGHTNESS) ./>buttons to select the direction
(horizontal or vertical), then press the >(CONTRAST)
?//buttons to move the OSD in the selected direction.
Power Saving Delay Time: The monitor enters Power Saving
mode after the selected time elapses. If you select “OFF,” the
monitor does not go into Power Saving mode.
User Control Lock: Once you select “ON” to lock the user
controls, you cannot select any item except “EXIT” and
“OPTION” in the MENU OSD. If you try to access any other
OSD, the Hmark appears on the screen.
To cancel the Control Lock: Repeat the above procedure and
set Control Lock to “OFF.”

– 10 –
10
Customizing Your Monitor
7Using the LANGUAGE OSD
You can set the OSD language to English, German, French,
Spanish, Italian or Japanese using the LANGUAGE OSD.
To reset to English, press the RESET button while the
LANGUAGE OSD is displayed.
1 Press the MENU button to display the MENU OSD.
2 Highlight the LANGUAGE OSD using the BRIGHTNESS
and CONTRAST buttons and press the MENU button again.
3 Press the ¨(BRIGHTNESS) ./>buttons to select the
desired language.
4 Press the MENU button once to return to the MENU OSD,
or press it twice to return to normal viewing.
8Using the GEOMETRY OSD
You can adjust the picture’s geometry using the GEOMETRY
OSD.
The rotation setting is stored in memory for all input signals.
All other settings are stored in memory for the current input
signals.
1 Press the MENU button to display the MENU OSD.
2 Highlight the GEOMETRY OSD using the BRIGHTNESS
and CONTRAST buttons and press the MENU button again.
3 Press the ¨(BRIGHTNESS) ./>buttons to select the
desired geometry adjustment.
4 Press the >(CONTRAST) ?//buttons to adjust the
geometry.
5 Press the MENU button once to return to the MENU OSD,
or press it twice to return to normal viewing.
Select
ROTATION
PINCUSHION
PIN BALANCE
KEYSTONE
KEY BALANCE
To
adjust the picture rotation
adjust the picture sides
adjust the picture side balance
adjust the trapezoidal distortion
adjust the picture shape balance
6Using the SIZE OSD
You can adjust the picture size using the SIZE OSD.
This setting is stored in memory for the current input signal.
1 Press the MENU button to display the MENU OSD.
2 Highlight the SIZE OSD using the BRIGHTNESS and
CONTRAST buttons and press the MENU button again.
3 To adjust the vertical size press the ¨(BRIGHTNESS) ./>
buttons.
4 To adjust the horizontal size press the >(CONTRAST)
?//buttons.
5 Press the MENU button once to return to the MENU OSD,
or press it twice to return to normal viewing.

– 11 –
11
Getting Started
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Resetting the Adjustments
Resetting a specific adjustment:
1 Press the MENU button to display the MENU OSD
2 Highlight the OSD containing the adjustment you want to
reset using the BRIGHTNESS and CONTRAST buttons and
press the MENU button again.
3 Press the ¨(BRIGHTNESS) ./>buttons to select the
adjustment you want to reset.
4 Press the (RESET) button to reset this specific
adjustment.
Resetting all of the adjustments for
the current input signal
WhilethereisnoOSDdisplayed,pressthe (RESET)
button.
All of the adjustments for the current input signal are reset to
the factory settings.
Adjustments not affected by changes in the input signal (such
as OSD language, OSD position, input signal selection, Power
Saving delay time and the Control Lock function) are not reset
to the factory settings.
Resetting all of the adjustments for
all input signals
Press and hold the (RESET) button for more than two
seconds.
All of the adjustments, including the brightness and contrast,
are reset to the factory settings.
Specifications
Picture tube 0.25 - 0.27 mm aperture grill pitch,
21 inches measured diagonally,
90 degree deflection
Phosphor Type P22
Transmission Ratio Approx. 39%
Faceplate Anti Reflective (AR)/Anti Static
(AS) coating
Viewable image size Approx. 403.8 ×302.2 mm (w/h)
(16 ×12 in.) 19.8” viewing image
Resolution
Horizontal Max. 1600 dots
Vertical Max. 1200 lines
Display picture size Approx. 388 ×291 mm (w/h)
(15
3
/ 8 ×11
1
/ 2 in.)
or
Approx. 364 × 291 mm (w/h)
(14
3
/ 8 ×11
1
/ 2 in.)
Input signal
Video Analog RGB (75 Ωtypical)
0.7 Vp-p, Positive
Sync External HD/VD, Composite
Polarity Free TTL
Video Composite (Sync on green)
0.3 Vp-p, Negative
Deflection frequency
Horizontal 30 to 107 kHz
Vertical 48 to 160 Hz
AC input voltage/current 100 to 240 V, 50 – 60 Hz, 2.0 – 1.0 A
Inrush current 120 VAC/50 A
240 VAC/80 A
Power consumption
Maximum 160 W
Nominal 120 W, 409 BTU/h
Dimensions 498 ×505 ×474 mm (w/h/d)
(19
5
/ 8 ×20 ×18
3
/ 4 in.)
Net weight Approx. 31 kg (68 lb 5 oz)
Shipping weight 37 kg (81 lb 9 oz)
Environmental Temperature
Operating 10˚ to 40˚ C (50˚ to 104˚ F)
Non-operating 0˚ to 60˚ C (32˚ to 140˚ F)
Environmental Humidity
Operating 10% to 80% (Non-condensing)
Non-operating 5% to 90% (Non-condensing)
Design and specifications are subject to change without notice.
Technical FeaturesCustomizing Your Monitor

– 12 –
11
Getting Started
EN
F
ES
D
J
C s
C t
PL
Resetting the Adjustments
Resetting a specific adjustment:
1 Press the MENU button to display the MENU OSD
2 Highlight the OSD containing the adjustment you want to
reset using the BRIGHTNESS and CONTRAST buttons and
press the MENU button again.
3 Press the ¨(BRIGHTNESS) ./>buttons to select the
adjustment you want to reset.
4 Press the (RESET) button to reset this specific
adjustment.
Resetting all of the adjustments for
the current input signal
WhilethereisnoOSDdisplayed,pressthe (RESET)
button.
All of the adjustments for the current input signal are reset to
the factory settings.
Adjustments not affected by changes in the input signal (such
as OSD language, OSD position, input signal selection, Power
Saving delay time and the Control Lock function) are not reset
to the factory settings.
Resetting all of the adjustments for
all input signals
Press and hold the (RESET) button for more than two
seconds.
All of the adjustments, including the brightness and contrast,
are reset to the factory settings.
Specifications
Picture tube 0.25 - 0.27 mm aperture grill pitch,
21 inches measured diagonally,
90 degree deflection
Phosphor Type P22
Transmission Ratio Approx. 39%
Faceplate Anti Reflective (AR)/Anti Static
(AS) coating
Viewable image size Approx. 403.8 ×302.2 mm (w/h)
(16 ×12 in.) 19.8” viewing image
Resolution
Horizontal Max. 1600 dots
Vertical Max. 1200 lines
Display picture size Approx. 388 ×291 mm (w/h)
(15
3
/ 8 ×11
1
/ 2 in.)
or
Approx. 364 × 291 mm (w/h)
(14
3
/ 8 ×11
1
/ 2 in.)
Input signal
Video Analog RGB (75 Ωtypical)
0.7 Vp-p, Positive
Sync External HD/VD, Composite
Polarity Free TTL
Video Composite (Sync on green)
0.3 Vp-p, Negative
Deflection frequency
Horizontal 30 to 107 kHz
Vertical 48 to 160 Hz
AC input voltage/current 100 to 240 V, 50 – 60 Hz, 2.0 – 1.0 A
Inrush current 120 VAC/50 A
240 VAC/80 A
Power consumption
Maximum 160 W
Nominal 120 W, 409 BTU/h
Dimensions 498 ×505 ×474 mm (w/h/d)
(19
5
/ 8 ×20 ×18
3
/ 4 in.)
Net weight Approx. 31 kg (68 lb 5 oz)
Shipping weight 37 kg (81 lb 9 oz)
Environmental Temperature
Operating 10˚ to 40˚ C (50˚ to 104˚ F)
Non-operating 0˚ to 60˚ C (32˚ to 140˚ F)
Environmental Humidity
Operating 10% to 80% (Non-condensing)
Non-operating 5% to 90% (Non-condensing)
Design and specifications are subject to change without notice.
Technical FeaturesCustomizing Your Monitor

D1626HT
– 13 –
SECTION 2
DISASSEMBLY
2-1. CABINET REMOVAL
2-2. D BOARD REMOVAL
Two screws
(+ BVTT 4 x 8)
Two screws
(+ BVTP 3 x 10)
D board
Screw
(+ P 3.5 x 20)
Open the D block in the direction
of the arrow . and remove of
the arrow .
Three hooks
6
A
B
A
B
Screw
(+BVTT 4 x 8)
1
2
3
4 5
Top cover
Four screws
(+ BVTT 4 x 8)
Four screws
(+ BVTT 4 x 8)
Video shield
4
5
6
8
Screw cover
Cabinet
3
Four screws
(+ BVTP 4 x 16)
2
1
Two claws
Screw cover
7

D1626HT
– 14 –
2-3. G BOARD REMOVAL
Open the G block in the direction
of the arrow . and remove of
the arrow .
Two screws
(+ BVTT 4 x 8)
Three hooks
Two screws
(+BVTP 3 x 10)
G shield
G board
BATwo printed circuit board holders
A
B
1
7
Screw
(+ BVTT 4 x 8)
3
2
4
5
6
2-4. A BOARD REMOVAL
A board Three screws
(+BVTT 4 x 8)
12

D1626HT
– 15 –
2-5. L BOARD REMOVAL
L board
Four printed circuit board holders
1
2
CN5001
CN5002 CN5004
CN5003
2-6. I/O TERMINAL BOARD REMOVAL
Three screws
(+ BVTT 3 x 8)
1
I/O terminal board assy
2
CN511 CN401
CN402

D1626HT
– 16 –
2-7. SERVICE POSITION
2-8. H AND J BOARDS REMOVAL
D board (Refer to 2-2.)
Rear shield
D,G boards
A board (Refer to 2-4.)
G board
(Refer to 2-3.)
CAUTION : SHORT
*
If the claw is hooked,
opening and closing
the board is impossible.
Do not try to do it by force.
*
If the claw is hooked,
opening and closing
the board is impossible.
Do not try to do it by force.
Four screws
(Tapping screw 5)
CN801
H board Two screws
(+ BVWHTP 3 x 12)
Bezel
1
2
3
4
Claw
J board
7
CN891
Shaft Claw
Claw
5
6

D1626HT
– 17 –
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 hurt the surface of anode-caps with shartp shaped material!
2Don’t press the rubber hardly not to hurt 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 hurt the rubber.
• 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.
2-9. PICTURE TUBE REMOVAL
a
b
c
Anode Button
Open the D block
(Refer 2-2.)
GND (DY)
6P (DY)
10P (DY)
Four screws
(+ BVTT 4 x 8)
A board
Open the G block
(Refer 2-3.)
Neck assy
Deflection yoke
Picture tube
Three connectors
Anode cap
1
2
3
4
5
6
8
9
7

D1626HT
– 18 –
SECTION 3
SAFETY RELATED ADJUSTMENT
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.
a) HV Regulator Circuit Check
1) Confirm that the voltage of the pin 2of CN901 on D
board is within the voltage range shown below.
Standard: 9.00 ± 0.065 VDC
b) HV Protector Circuit Check
1) Confirm that the HV protector circuit works and TV
Raster disappears when apply the voltage as shown
below between pin 3of CN901 on D board and
GND using an external DC power supply.
Check Condition: Less than 34.10 VDC
c) Beam Current Protector Circuit Check-1
1) Measure HV voltage and record that value.
2) Shorted between pin 1and pin 4of CN901 on D
board.
3) Connect to the Constant Current Jig (A) between pin
1of CN901 on D board and GND, confirm that the
Beam Current Protector Circuit works and HV go
down more than 1.25 kV from the value of (1).
Check Condition: 1.50 mA
d) Beam Current Protector Circuit Check-2
1) Connect to the Constant Current Jig (B) between pin
1of CN901 on D board and GND, confirm that the
Beam Current Protector Circuit works and TV Raster
disappears.
Check Condition: 1.59 mA
e) Voltage of 3rd winding of FBT
1) Confirm that the voltage of pin 3of CN901 on D
board is within the voltage range shown below.
Standard: more than 28.0 VDC
HV Regulator
Circuit Check
HV Protector
Circuit Check
Beam Current
Protector Circuit
Check
Part Replaced (])
D Board IC901, T902
• Mounted D board
D Board Q660, Q661, D916,
D935, C924, R665,
R667, R940, R980,
T902
• Mounted D board
G Board PH680, Q680, Q683,
D680, R680, R685,
R686, R687, R688,
R689
• Mounted G board
D Board IC901, D904, D907,
D908, R011, R908,
R909, R921, R925,
R926, R929, R930,
T902
• Mounted D board
Check Condition
Input voltage : 100 ~ 240 VAC
Input signal : White Cross Hatch at 107 kHz
Beam control : BRT and CONT →Minimum
B+ voltage : 195 ~ 205 VDC

D1626HT
– 19 –
SECTION 4
ADJUSTMENTS
•Landing Rough Adjustment
1. Enter the full white signal. (or the full black dots signal).
2. Adjust the contrast to the maximum.
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. 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. (“LCC SW” = “12”)
2. Input the single green signal and set the CONT control to
MAX.
Note: After the W/B adjustment with 9300K, measure an average
of ΣIk when a full white signal is entered in the CONT
MAX/BRT CENT status. Then make adjustment so that the
specified screen can be attained after aging for 2 hours with
Ik equivalent to 30% of the average value.
3. Demagnetize the metal part of the chassis with the hand de-
gausser and coil degausser, and the CRT surface with the
hand degausser.
Input AC 230V to AC IN, turn on and off the power to per-
form auto degaussing. (Perform auto degaussing by setting
“MON CON REG2”=152. Return to the original value after
use.)
Demagnetize the CRT surface with the hand degausser again.
Note:
(1) Hand degauss must be used on stand-by or power-off condi-
tion.
This model has an automatic earth magnetism correction
function by using an earth magnetism sensor and a LCC coil.
When using a hand degauss while monitor (LCC coil) is being
operated, it sometimes gets magnetized, and the system may
not work properly as a result.
(2) Adjust in a non-magnetic field. BV=45uT.
(3) If adjusting in a magnetic fields, add the shift from the non-
magnetic field in your estimation.
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.
6. Adjust the DY position and purity, and the DY tilt, and land-
ing of the center and 4 corners with the landing checker.
After adjustment, set “LCC SW” to “13”.
•Write terrestrial magnetism sensor reading VX and VY to
“LCC VX” and LCC VY” respectively. Adjust the landing
by moving “LCC NS”, “LCC LT”, “LCC LB”, “LCC RT”
and “LCC RB”. However, the register adjustment must be
limited within the following range.
“LCC NS” 128 ± 15
“LCC LT”, “LCC LB”, “LCC RT”, “LCC RB”
128 ± 40
Save the service data.
A difference between red and blue
must be within the specification
given right.
* Adjustment and measurement should be made at the points one
inch inside the fluorescent screen.
± 6 ± 6 ± 6
± 6 ± 4 ± 6
± 6 ± 6 ± 6
<Specifications>
Adjust so that the green is within
the specification given right.
4 corner adjust target : within ± 1
The red and blue must be within
the specification given right with
respect to the green.
0 ± 3 0 ± 7.5 0 ± 3
0 ± 5 0 ± 5 0 ± 5
0 ± 3 0 ± 7.5 0 ± 3
(µm)
(µm)
10 10 10
10 7 10
10 10 10
(µm)
7. For the up/down swing, swing the DY and insert a wedge so
that the up and down pins are equal at the top and bottom.
Adjust the DY TLV VR so that the horizontal trapezoid is
equal at the left and right. Insert the wedge firmly so that the
DY does not shake.
8. Check the landing of each corner, and if it does not satisfy the
specification, adjust the landing of four corners using “LCC
LT“, “LCC LB”, “LCC RT” and “LCC RB”.
However, the register adjustment must be limited within the
following range.
“LCC NS” 128 ± 15
“LCC LT”, “LCC LB”, “LCC RT”, “LCC RB” 128 ± 40
After adjustment, save the service data.
9. Remove the sensor and wobbling coil.
10. Switch the signal to R.G.B., and check that each color is pure.
11. Check that the DY is not tilting.

D1626HT
– 20 –
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.
XBV XCV
R
B
B
RR B B
R BBR
H. AMP
H. TILT (TLH) YBHYCH
R B R B
R
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
•Convergence Rough Adjustment
(1) Receive an image of the white crosshatch signals (white lines
on black).
(2) Place the protrusions of the 6-fold poles magnet attached to
the CRT neck upon each other. (Fig. 1)
(3) Make rough adjustment of the H and V direction convergence
by using 4-fold poles magnet.
(4) Make a rough adjustment of the V direction convergence by
using “V. STAT”.
Protrusions
60°
*
Fig. 1
Fig. 3 Fig. 2
TLV
YCH
YBH
XBV
XCV
APH
* Set so that the protruding parts of
the 2 magnet rings agree with each
other.
*
•Convergence Specification
•White Balance Adjustment Specification
(1) 9300K
x = 0.281 ± 0.005
y = 0.311 ± 0.005
(All White)
(2) 6500K
x = 0.313 ± 0.005
y = 0.329 ± 0.005
(All White)
•Vertical and Horizontal Position and Size
Specification
•Focus adjustment
Adjust the focus volume 1 and 2 (HDK 1 and 2) for the
optimum focus.
B
a
a 3.5 mm
b 3.5 mm
b
A
MODE
A
B
1, 2, 5
388 mm
291 mm
3, 4
364 mm
291 mm
FBT
HDK1 (V)
HDK2 (H)
B
A
VMODE
A
B
For SH Model
1-5
0.28 mm
0.32 mm