HP P4819 User manual

SERVICE MANUAL
21CR1 CHASSIS
Design and specications are subject to change without notice.
COLOR MONITOR
US Model
Canada Model
AEP Model
China Model
Japan Model
N. Hemisphere Model
S. Hemisphere Model
Chassis No: SCC-L33S-A
P4819
9-978-996-01
ORIGINAL MANUAL ISSUE DATE: 11/2002
ALL REVISIONS AND UPDATES TO THE ORIGINAL MANUAL ARE APPENDED TO THE END OF THE PDF FILE.
REVISION DATE REVISION TYPE SUBJECT
11/2002 No revisions or updates are applicable at this time.
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:

SERVICE MANUAL
21CR1 CHASSIS
Design and specications are subject to change without notice.
COLOR MONITOR
US Model
Canada Model
AEP Model
China Model
Japan Model
N. Hemisphere Model
S. Hemisphere Model
Chassis No: SCC-L33S-A
P4819
9-978-996-01
Picture tube 0.24 mm aperture grill pitch (center)
21 inches measured diagonally
90-degree deection
FD Trinitron
Video image area 19.8" viewing image
Approx. 403.8 X 302.2 mm (w/h)
(16 x 12 inches)
Resolution
*Maximum
Addressable: Horizontal: Max. 1600 dots
Vertical: Max. 1200 lines
Standard image area Approx. 388 x 291 mm (w/h)
(15
3/8
x 11
1/2
inches)
or Approx. 364 x 291 mm (w/h)
(14
3/8
x 11
1/2
inches)
Input signal
Video Analog RGB (75 ohms typical)
0.700 Vp-p Positive
Sync H/V Separate and Composite sync
TTL 2 k ohms, Polarity free
Sync on Green:
0.3 Vp-p Negative
Power consumption 145 W
Deection frequency* Horizontal: 30 kHz to 130 kHz
Vertical: 48 kHz to 170 kHz
AC input voltage/current 100V to 240V, 50 - 60Hz,
2.0 - 1.0A
Dimensions 497 x 502 x 490.3 mm (w/h/d)
Mass Approx. 30.5 kg (67 lb 4 oz.)
Plug and Play DDC2B/DDC2Bi, GTF**
* Recommended horizontal and vertical timing condition
● Horizontal sync width duty should be more than 4.8% of
total horizontal time or 0.8 µs, whichever is larger.
● Horizontal blanking width should be more than 2.3 µ sec.
● Vertical blanking width should be more than 450 µ sec.
** If the input signal is Generalized Timing Formula (GTF)
compliant, the GTF feature of the monitor will automatically
provide an optimal image for the screen.
SPECIFICATIONS

— 3 —
P4819
TABLE OF CONTENTS
SECTION TITLE PAGE
Power Management .................................................................................................................................. 4
Diagnosis Function.................................................................................................................................... 4
Timing Specication .................................................................................................................................. 5
Warnings and Cautions ............................................................................................................................. 6
Safety Check-Out...................................................................................................................................... 7
SECTION 1: DISASSEMBLY.................................................................................................................................. 8
1-1. Cabinet Removal............................................................................................................................. 8
1-2. Service Position............................................................................................................................... 9
1-3. A1 Board (C Block) Removal ........................................................................................................ 10
1-4. A1 Board Removal ........................................................................................................................ 10
1-5. Bezel Assembly and H7 Board Removal........................................................................................11
1-6. D Board Removal .......................................................................................................................... 12
1-7. Picture Tube Removal ................................................................................................................... 13
Anode Cap Removal ..................................................................................................................... 13
1-8. Harness Location .......................................................................................................................... 14
SECTION 2: SAFETY RELATED ADJUSTMENTS.............................................................................................. 15
2-1. HV Regulator Circuit Check .......................................................................................................... 15
2-2. HV Protector Circuit Check............................................................................................................ 15
2-3. Beam Current Protector Circuit Check .......................................................................................... 15
SECTION 3: ADJUSTMENTS .............................................................................................................................. 16
3-1. Landing Rough Adjustment ........................................................................................................... 16
3-2. Landing Fine Adjustment............................................................................................................... 16
3-3. Convergence Rough Adjustment................................................................................................... 17
3-4. White Balance Adjustment Specication ....................................................................................... 17
3-5. Vertical and Horizontal Position and Size Specication ................................................................ 18
3-6. Focus Adjustment.......................................................................................................................... 18
SECTION 4: DIAGRAMS...................................................................................................................................... 19
4-1. Circuit Boards Location ................................................................................................................. 19
4-2. Printed Wiring Board and Schematic Diagram Information........................................................... 19
4-3. Block Diagrams ............................................................................................................................. 20
A1 Block Diagram, H7 Block Diagram, and L2 Block Diagram ..................................................... 20
DA Block Diagram and N Block Diagram ...................................................................................... 21
D Block Diagram ........................................................................................................................... 22
4-4. Schematics and Supporting Information ....................................................................................... 23
H7 Board Schematic Diagram....................................................................................................... 23
D Board Schematic Diagram......................................................................................................... 24
DA Board Schematic Diagram....................................................................................................... 26
N Board Schematic Diagram......................................................................................................... 27
L2 Board Schematic Diagram ....................................................................................................... 28
A1 Board Schematic Diagram ....................................................................................................... 29
4-5. Semiconductors............................................................................................................................. 31
SECTION 5: EXPLODED VIEW ........................................................................................................................... 33
5-1. Chassis.......................................................................................................................................... 33
5-2. Picture Tube .................................................................................................................................. 34
5-3. Packing Materials .......................................................................................................................... 35
SECTION 6: ELECTRICAL PARTS LIST............................................................................................................ 36

— 4 —
P4819
POWER MANAGEMENT
The power saving mode complies with the VESA Display Power Management Signaling standard. Each state of power management shall be activated
by the host computer terminating the appropriate sync signals. Blanking the video must precede termination of the sync signals. The elapsed time
counter shall also be controlled by the host computer. Reactivation of the monitor shall be accomplished from the host computer by re-establishing the
normal sync signal.
Power consumption Screen Horizontal Vertical Power Recovery time Indicator
mode (video) sync signal sync signal consumption
1 Normal operation active yes yes < 135 W -- Green
2 Active-off* (deep sleep)** blank no* no* < 3 W Amber
3 Power-off -- -- -- 0 W (approx) -- Off
* When your computer enters power saving mode, the input signal is cut and NO SIGNAL appears on the screen before the
monitor enters active mode. After a few seconds, the monitor enters power saving mode.
* "Deep sleep" is power saving mode dened by the Environmental Protection Agency.
DIAGNOSIS FUNCTION
When a failure occurs, the STANDBY/TIMER lamp will ash 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 rst of the problem areas.
1
2
3
5
4
Status Area of Failure LED Indication
Amber (0.5 second) / Off (0.5 second)
Amber (0.5 second) / Off (1.5 second)
+B
Horizontal/Vertical Deflection Failure
Thermal Protector
ABL Protector
HV Failure
Failure 1
Failure 2
Failure 3
Failure 4
Aging/Self Test
6Out of scan range
Amber (1.5 second) / Off (0.5 second)
Green (0.5 second) / Off (0.5 second)
Green (OSD Indication)
Amber (0.25 second) / Off (0.25 second)
Amber (0.25 second) / Off (1.25 second)
Amber (0.5 second) / Off (0.5 second)
Aging Mode (Video Aging): During Power Save, press MENU button for longer than 2 seconds.
Self Test (OSD Color Bar): During Power Save, push up Control button for longer than 2 seconds.
Reliability Check Mode: During Power Save, push down Control button for longer than 2 seconds.

— 5 —
P4819
TIMING SPECIFICATION
MODE AT PRODUCTION MODE 1 MODE 2 MODE 3 MODE 4 MODE 5
RESOLUTIION 640 X 480 1600 X 1200 1280 X 1024 1920 X 1440 640 X 400
CLOCK 25.175 MHz 229.500 MHz 157.500 MHz 297.000 MHz 25.175 MHz
--HORIZONTAL--
H-FREQ 31.469 kHz 106.250 kHz 91.146 kHz 112.500 kHz 31.469 kHz
usec usec usec usec usec
H. TOTAL 31.778 9.412 10.971 8.889 31.778
H. BLK 6.356 2.440 2.844 2.424 6.356
H. FP 0.636 0.279 0.406 0.485 0.636
H. SYNC 3.813 0.837 1.016 0.754 3.813
H. BP 1.907 1.325 1.422 1.185 1.907
H. ACTIV 25.422 6.972 8.127 6.465 25.422
--VERTICAL--
V. FREQ (HZ) 59.940 Hz 85.000 Hz 85.024 Hz 75.000 Hz 69.931 Hz
lines lines lines lines lines
V. TOTAL 525 1250 1072 1500 450
V. BLK 45 50 48 60 50
V. FP 10 1 1 1 12
V. SYNC 2 3 3 3
V. BP 33 46 44 56 36
V. ACTIV 480 1200 1024 1440 400
--SYNC--
INT (G) NO NO NO NO NO
EXT (H/V)/POLARITY YES N/N YES P/P YES P/P YES N/P YES N/N
EXT (CS)/POLARITY NO NO NO NO NO
INT/NON INT NON INT NON INT NON INT NON INT NON INT
2
MODE 7 MODE 8 MODE 9 MODE 10
1280 X 1024 1600 X 1200 1800 X 1440 1920 X 1440
135.000 MHz 234.780 MHz 299.000 MHz 341.000 MHz
79.976 kHz 107.108 kHz 120.565 kHz 128.485 kHz
usec usec usec usec
12.504 9.336 8.294 7.783
3.022 2.522 2.274 2.152
0.119 0.511 0.472 0.457
1.067 0.750 0.666 0.622
1.837 1.261 1.137 1.073
9.481 6.815 6.020 5.630
75.025 Hz 85.006 Hz 80.003 Hz 84.977 Hz
lines lines lines lines
1066 1260 1507 1512
42 60 67 72
1 1 1 1
3 3 3 3
38 56 63 68
1024 1200 1440 1440
NO NO NO NO
YES P/P YES N/P YES N/P YES P/P
NO NO NO NO
NON INT NON INT NON INT NON INT
MODE AT PRODUCTION MODE 6
RESOLUTIION 1024 X 768
CLOCK 94.500 MHz
--HORIZONTAL--
H-FREQ 68.677 kHz
usec
H. TOTAL 14.561
H. BLK 3.725
H. FP 0.508
H. SYNC 1.016
H. BP 2.201
H. ACTIV 10.836
--VERTICAL--
V. FREQ (HZ) 84.997 Hz
lines
V. TOTAL 808
V. BLK 40
V. FP 1
V. SYNC 3
V. BP 36
V. ACTIV 768
--SYNC--
INT (G) NO
EXT (H/V)/POLARITY YES P/P
EXT (CS)/POLARITY NO
INT/NON INT NON INT

— 6 —
P4819
WARNINGS AND CAUTIONS
CAUTION
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.
WARNING!!
An isolation transformer should be used during any service to avoid possible shock hazard, because of live chassis. The chassis of this
receiver is directly connected to the ac power line.
! SAFETY-RELATED COMPONENT WARNING!!
Components identied 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 appear as shown in this manual or in supplements published
by Sony. Circuit adjustments that are critical for safe operation are identied in this manual. Follow these procedures whenever critical
components are replaced or improper operation is suspected.
ATTENTION!!
Apres avoir deconnecte le cap de l’anode, court-circuiter l’anode du tube cathodique et celui de l’anode du cap au chassis metallique de
l’appareil, ou la couche de carbone peinte sur le tube cathodique ou au blindage du tube cathodique.
An d’eviter tout risque d’electrocution provenant d’un chássis sous tension, un transformateur d’isolement doit etre utilisé lors de tout
dépannage. Le chássis de ce récepteur est directement raccordé à l’alimentation du secteur.
! ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!
Les composants identies par une trame et par une marque ! sur les schemas de principe, les vues explosees et les listes de pieces
sont d’une importance critique pour la securite du fonctionnement. Ne les remplacer que par des composants Sony dont le numero de
piece est indique dans le present manuel ou dans des supplements publies par Sony. Les reglages de circuit dont l’importance est
critique pour la securite du fonctionnement sont identies dans le present manuel. Suivre ces procedures lors de chaque remplacement
de composants critiques, ou lorsqu’un mauvais fonctionnement suspecte.

— 7 —
P4819
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly soldered
connections. Check the entire board surface for solder splashes and
bridges.
2. Check the interboard wiring to ensure that no wires are “pinched” or
touching 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 specied values. Make
sure your instruments are accurate; be suspicious of your HV
meter if sets always have low HV.
8. Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage. Check
leakage as described below.
Leakage 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 microamperes). Leakage current
can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instructions.
2. A battery-operated AC milliampmeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter. The “limit” indication is 0.75
V, so analog meters must have an accurate low voltage scale.
The Simpson’s 250 and Sanwa SH-63TRD are examples of
passive VOMs that are suitable. Nearly all battery-operated digital
multimeters that have a 2 VAC range are suitable (see Figure A).
How to Find a Good Earth Ground
A cold-water pipe is a guaranteed earth ground; the cover-plate retaining
screw on most AC outlet boxes is also at earth ground. If the retaining
screw is to be used as your earth ground, verify that it is at ground
by measuring the resistance between it and a cold-water pipe with an
ohmmeter. The reading should be zero ohms.
If a cold-water pipe is not accessible, connect a 60- to 100-watt trouble-
light (not a neon lamp) between the hot side of the receptacle and the
retaining screw. Try both slots, if necessary, to locate the hot side on the
line; the lamp should light at normal brilliance if the screw is at ground
potential (see Figure B).
Trouble Light
AC Outlet Box Ohmmeter
Cold-water Pipe
Figure A. Using an AC voltmeter to check AC leakage. Figure B. Checking for earth ground.
To Exposed Metal
Parts on Set
0.15 µF 1.5 K ΩAC
Voltmeter
(0.75 V)
Earth Ground

— 8 —
P4819
SECTION 1: DISASSEMBLY
1-1. CABINET REMOVAL
1
Two screws
(+BVTP 4 x 16)
6
Slide the EMI shield in the direction
of arrow and remove four claws.
7
EMI shield
4
Four screws
(+BVTT 4 x 8)
5
Three screws
(+BVTT 4 x 8)
2
Two claws
Bezel assembly Bezel assembly
EMI shield
Cabinet Cabinet
Push in the tip of a screwdriver
about 10mm to unlock the claw.
B
A
C
3
Push the upper side of the cabinet
in the direction of arrow , disconnect claws
,
then remove the cabinet
lifting it up in the direction of arrow .
A
B
C

— 9 —
P4819
1-2. SERVICE POSITION
1
2
3
4
1
Remove the D board.
D board
2
Remove the Video block assembly.
3
Install the Adaptor board (XT MOUNT) (A-1391-123-A).
4
Lay the Video block assembly.
Video block assembly
Video block assembly
5
5
Install the video block assembly.
6
Put a box which is about 15cm in height under the D board to fix it.
(Please disconnect the CN 701 first.)
D board
Box

— 10 —
P4819
1-3. A1 BOARD (C BLOCK) REMOVAL
1-4. A1 BOARD REMOVAL
1
A1 board (C BLOCK)
CN315
CN318
GND
GND
1
Two screws
(+BVTP 3 x 8)
2
Video block assembly
3
Four screws
(+BVTP 3 x 8)
4
Video shield
5
Four screws (HEX)
6
Screw
(+BVTP 3 X 8)
7
Video case
8
A1 board
CN315

— 11 —
P4819
1-5. BEZEL ASSEMBLY AND H7 BOARD REMOVAL
2
1
Four tapping screws (5)
5
Bezel assembly
3
Screw
(+BVTP 4 x 16)
4
Screw
(+BVTP 4 x 16)
6
Three screws
(+BVTP 3 x 10)
9
Two claws
8
H7 board
7
Input button
11
Magnetic
MIU-221D sensor
10
L1 blacket
CN1400
CN1500
CN1401
Picture tube shield
Before removing the bezel assembly, secure
the picture tube by attaching two screws to
the picture tube shield at the positions shown
with an arrow (diagonal two places) to prevent
the picture tube from falling.
(Use the screws +BVTT 4 x 8 that fix EMI shield.)

— 12 —
P4819
1-6. D BOARD REMOVAL
1
A1 board
(C block)
2
Two screws
(+BVTP 3 x 8)
4
Two screws
(+BVTP 3 x 10)
D board
3
Video block assembly
5
Rear plate assembly
6
Five screws
(+BVTP 3 x 10)
CN315
CN602
CN601
CN1103
CN1601
CN1600
CN1003
CN605
CN701
Connector (4P)
Connector (4P)
CN501
GND
GND
8
Screw (+BVTP 3X10)
7

— 13 —
P4819
a
b
Anode Button
c
ANODE CAP REMOVAL
WARNING: High voltage remains in the CRT even after the power is disconnected. To avoid electric shock, discharge CRT before attempting to remove
the anode cap. Short between anode and coated earth ground strap of CRT.
NOTE: After removing the anode cap, short circuit the anode of the picture tube and the anode cap to either the metal chassis, CRT shield, or carbon
painted on the CRT.
REMOVAL PROCEDURES
HOW TO HANDLE AN ANODE CAP
1. Do not use sharp objects which may cause damage to the surface of the anode
cap.
2. To avoid damaging the anode cap, do not squeeze the rubber covering too hard.
A material tting 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.
Turn up one side of the rubber cap in the
direction indicated by arrow a.
Use your thumb to pull the rubber
cap rmly in the direction indicated
by arrow b.
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 c.
1-7. PICTURE TUBE REMOVAL
4
Picture tube
1
Anode cap
2
A1 board (C block)
3
Neck assembly
CN1
CN2
CN3
CN2
GND

— 14 —
P4819
1-8. HARNESS LOCATION
CN602
CN601
CN604 CN1102
CN312 CN311
CN318
CN319
CN320
CN316
CN315
CN303
CN1103
CN1400
CN1500
CN1401
CN701
CN501
CN1601
CN1600
CN1602
CN2
CN1
CN1
5P
CN3
CN1003
CN904
4P
4P
D board
A1 board
N board
L2 board
Magnetic sensor
H7 board
Picture tube
AC inlet (3P)

— 15 —
P4819
2-1. HV REGULATOR CIRCUIT CHECK
1. Turn the RV901 slowly, and adjust so that high voltage is in the
specied range.
[Specication]: 27.00 ± 0.05 kV
2. Check that the voltage of D912 cathode on the D board is 17.0V
or more.
2-2. HV PROTECTOR CIRCUIT CHECK
1. Using external DC Power Supply, apply the voltage shown below
between cathode of D912 and GND, and check that the RASTER
disappears.
[Specication]: 19.95 ± 0.00/-0.05V
2-3. BEAM CURRENT PROTECTOR CIRCUIT
CHECK
1. Connect constant current source to a section between T901 (FBT)
11
pin and GND, and check that the RASTER disappears when
the specied current ows to the
11
pin.
[Specication]: 2.12 ± 0.00/-0.051 mA
SECTION 2: SAFETY RELATED ADJUSTMENTS
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.
Conrm one minute after turning on the power.
Part Replaced ( )
HV ADJ RV901
Part Replaced ( )
D Board C925, IC901, R901, R902, R905,
R924, R925, R926, RV901,
T901 (FBT),
• Mounted D Board
HV Regulator
Circuit Check
D Board
C920, C923, D911, D912, R903,
R917, R918, R919, R920, R923,
T901 (FBT)
• Mounted D Board
N Board
IC1001, RB1001
• Mounted N Board
N Board
IC1001, RB1001
• Mounted N Board
HV HOLD
DOWN
Circuit Check
D Board
C930, D917, R921, R932, R933,
R935, T901 (FBT)
• Mounted D Board
Beam Current
Protector
Circuit Check

— 16 —
P4819
SECTION 3: ADJUSTMENTS
Connect the communication cable of the connector located on the D Board on the monitor. Run the service software and then follow the instructions.
IBM at Computer
as a Jig
12
3
1-690-391-21 A-1500-819-A
Interface Unit
3-702-691-01
Connector Attachment
BUS CONNECTOR
To
D-Sub
(9 Pin [female])
Mini Din
(8 Pin) 4 Pin 4 Pin 4 Pin
* The Parts above ( ) are necessary for DAS Adjustment.
13
~
9. Attach a wobbling coil to the specied position of CRT neck.
10. Put on landing sensor to CRT face.
11. Set LCC_SW to 12.
12. With landing checker, adjust DY position, purity, DY center and the
landing of the 4 corners.
13. Read VX and VY values which are read out of the magnetic sensor,
and write to LCC_VX_REF and LCC_VY_REF.
14. Adjust landing by LCC_NS, LSS_LT, LCC_LB, LCC_RT, and
LCC_RB. Adjustment of registers shall be limited within the
following range:
LCC_NS: 128 ± 15
LCC_LT, LCC_LB, LCC_RT, and LCC_RB: 128 ± 40
Set LCC_SW to 13, and Perform Service Save.
± 6 ± 6 ± 6
± 6 ± 6 ± 6
± 6 ± 6 ± 6
<Specifications>
A
djust 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.
A
difference between red and blue
must be within the specification
given right.
0 ± 3 0 ± 7.5 0 ± 3
0 ± 3 0 ± 7.5 0 ± 3
0 ± 3 0 ± 7.5 0 ± 3
(µm)
(µm)
10 10 10
10 7 10
10 10 10
(µm)
15. Tighten DY screw within specied torque, and auto-degauss.
NOTE: Torque 22 ± 2 kgcm (2.2 ± 0.2 Nm)
Allow a 30 minute warm-up period prior to making the following
adjustments.
3-1. LANDING ROUGH ADJUSTMENT
1. Display the all white pattern.
2. Set contrast to 255.
3. Display plain green pattern.
4. Slide the DY back and roughly adjust the plain green pattern with
the purity magnet so that it is centered on the screen.
5. Adjust the DY tilt.
NOTE: Set ROTATION to 128 and LCC_NS to 128 when adjusting
the DY tilt.
6. Lightly tighten the DY screw.
3-2. LANDING FINE ADJUSTMENT
NOTE: (1) After adjusting W/B (9300k), measure the average of ΣΙΚ
with all white video input, while CONTRAST is maximum
and BRIGHTNESS is centered. Make the adjustments so
that the miss-landing becomes least after aging 2H with
the ΙΚ 30% of measured value shown above.
(2) The magnetic eld shall be BH = 0.
(3) When adjusting at other than BH = 0, calculate the shifted
value from BH = 0.
1. Place the monitor in the Helmholtz coil.
2. Set as follows;
LCC-SW = 0 (LCC Correction Current = 0)
FUNCTION_SW bit1 = (Auto Degauss = On)
CONTRAST = 255
3. Display plain green pattern.
4. Degauss the iron part of the chassis with a hand-degausser and
degauss coil.
5. Degauss the CRT face with degauss equipment or hand-degausser.
6. Input AC 230V to AC IN and turn the monitor off and on to activate
the auto degausser.
7. Reset FUNCTION_SW bit 1 to 0 (auto-degauss = off)
8 Repeat step 5 by degaussing the CRT face with degauss equipment
or hand-degausser.

— 17 —
P4819
16. Adjust the vertical angle of the DY to make the top and bottom pins
equal (a = b). The horizontal angle is not changed (straight). Settle
DY upright without leaning, and insert wedges rmly so that the DY
does not move.
a
b
c d
<How to place wedge>
Green plain crosshatch pattern
a and b should be equal.
c and d should be equal.
Plaster RTV to both sides for the upper wedge.
Make sure that they settle inside DY.
Plaster RTV to one side for other wedges.
17. Adjust the top and bottom pins correction VR.
18. Adjust the horizontal trapezoid distortion by DY horizontal trapezoid
correction VR.
19. Check the landing at each corner. If the landing is not set to
specication, adjust the landing of the 4 corners with LCC_NS,
LSS_LT, LCC_LB, LCC_RT, and LCC_RB. The limitations of
registers are shown below:
LCC_NS: 128 ± 15
LCC_LT, LCC_LB, LCC_RT, and LCC_RB: 128 ± 40
20. Remove the sensor and wobbling coil.
21. Switch signals to R, G, B, and then check that the pure colors have
good color purity.
22. Fix purity magnets with white paint.
3-3. CONVERGENCE ROUGH
ADJUSTMENT
1. Display the white crosshatch pattern.
2. Pile the convex parts of the 6-pole magnet for convergence
together.
3. Roughly adjust H.CONV and V.CONV with the 4-pole magnet.
Purity
4-pole magne
t
6-pole magne
t
2-pole magne
t
H.TRAP
TB-PIN
TLH
XCV
XBVXCV
B
R
B
R
R
B
B
R
R BB R
TLV
TLH
YBHYCH
R B R B
Convergence Specification
B
A
A
0.20 mm
B
0.24 mm
V
3-4. WHITE BALANCE ADJUSTMENT
SPECIFICATION
1. 9300 K
x = 0.283 ± 0.005
y = 0.298 ± 0.005
(All White)
2. 6500 K
x = 0.313 ± 0.005
y = 0.329 ± 0.005
(All White)
3. 5000 K
x = 0.346 ± 0.005
y = 0.359 ± 0.005
(All White)

— 18 —
P4819
3-5. VERTICAL AND HORIZONTAL POSITION
AND SIZE SPECIFICATION
B
a
a 1.8 mm
b 1.8 mm
a
b
b
A
MODE
A
B
4 : 3
388
291
3-6. FOCUS ADJUSTMENT
1. Adjust Focus (V) and Focus (H) for optimum focus.
Focus (V)
Focus (H)

— 19 —
P4819
RESISTOR
: RN METAL FILM
: RC SOLID
: FPRD NONFLAMMABLE CARBON
: FUSE NONFLAMMABLE FUSIBLE
: RW NONFLAMMABLE WIREWOUND
: RS NONFLAMMABLE METAL OXIDE
: RB NONFLAMMABLE CEMENT
: ADJUSTMENT RESISTOR
COIL
: LF-8L MICRO INDUCTOR
The components identied by shading and ! symbol are critical for safety. Replace
only with part number specied.
The symbol indicates a fast operating fuse and is displayed on the component
side of the board. Replace only with fuse of the same rating as marked.
Les composants identies per un trame et une marque ! sont critiques pour la
securite. Ne les remplacer que par une piece portant le numero specie.
Le symbole indique une fusible a action rapide. Doit etre remplace par une
fusible de meme yaleur, comme maque.
CAPACITOR
: TA TANTALUM
: PS STYROL
: PP POLYPROPYLENE
: PT MYLAR
: MPS METALIZED POLYESTER
: MPP METALIZED POLYPROPYLENE
: ALB BIPOLAR
: ALT HIGH TEMPERATURE
: ALR HIGH RIPPLE
REFERENCE INFORMATION
SECTION 4: DIAGRAMS
4-1. CIRCUIT BOARDS LOCATION
D
H7
A1
L2
DA
N
4-2. PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM INFORMATION
All capacitors are in µF unless otherwise noted. pF : µµF 50WV or less
are not indicated except for electrolytics and tantalums.
All electrolytics are in 50V unless otherwise specied.
All resistors are in ohms. kΩ=1000Ω, MΩ=1000kΩ
Indication of resistance, which does not have one for rating electrical
power, is as follows: Pitch : 5mm
Rating electrical power : 1/ 4 W
1/ 4 W in resistance, 1/10 W and 1/ 8 W in chip resistance.
: nonammable resistor.
: fusible resistor.
: internal component.
: panel designation and adjustment for repair.
: earth ground
: earth-chassis
All variable and adjustable resistors have characteristic curve B, unless
otherwise noted.
Readings are taken with a color-bar signal input.
Readings are taken with a 10MΩ digital multimeter.
Voltages are DC with respect to ground unless otherwise noted.
Voltage variations may be noted due to normal production tolerances.
All voltages are in V.
S : Measurement impossibillity.
: B+line.
: B-line (Actual measured value may be different).
: signal path (RF).
Circled numbers are waveform references.
The components identied by X in this basic schematic diagram
have been carefully factory-selected for each set in order to satisfy
regulations regarding X-ray radiation. Should replacement be necessary,
replace only with the value originally used.
When replacing components identied by Y , make the necessary
adjustments as indicated. If the results do not meet the specied value,
change the component identied by X and repeat the adjustment until
the specied value is achieved.
(Refer to Section 2: Safety Releated Adjustments.)
When replacing the parts listed in the table below, it is important to
perform the related adjustments.
Part Replaced ( )
HV ADJ RV901
Part Replaced ( )
D Board C925, IC901, R901, R902, R905,
R924, R925, R926, RV901,
T901 (FBT),
• Mounted D Board
HV Regulator
Circuit Check
D Board
C920, C923, D911, D912, R903,
R917, R918, R919, R920, R923,
T901 (FBT)
• Mounted D Board
N Board
IC1001, RB1001
• Mounted N Board
N Board
IC1001, RB1001
• Mounted N Board
HV HOLD
DOWN
Circuit Check
D Board
C930, D917, R921, R932, R933,
R935, T901 (FBT)
• Mounted D Board
Beam Current
Protector
Circuit Check

P4819
— 20 —
4-3. BLOCK DIAGRAMS
A1 BLOCK DIAGRAM, H7 BLOCK DIAGRAM, AND L2 BLOCK DIAGRAM
      
 



      
 
   

      
  


















 
 
 
 

                      
          
  
  
  









  
  
  



  
  
  
 
 
 
 
 
 
  
  
  
  
 
 
 
 
 

 

    
 
  
 















      
      
  
 















  
 
  
        
  
      
  
    
    
    
   





















  
  
  
 
    
  
  
  
   
  
    
    
  
 
  
    
    
  
    
 
  
    
    
   
   
  
 
 
 
  
     
  
      
 
  
   
  
  
  
  
    

 
 
    
 
 
 












 





 

  
 
 
  




 
 
 
    
  




 
 
 
    
    
  
 
        

   
 


      
  
      
  
              
                    
     
   
  














     
    
    
     
    
    
  
    
   
  
  
    
    
  
   
  
     
  
 
   
   
 
  
   



  
 
 
  
   











   
      
  
  
    
  
 
 
  
  

      
  

      
  
      
      





  
   
  
  
   
  

      
  

 
  
  
   
  
   
  

  

  



 
 


   
   
  











  
 
 
  
 
 
 
 
   


    
     
  








     
     
     
     
     
      
     
      
  
   
   
    
    
  






  






  






  






  






  










  
  
  
  
  
  
 
  
      
 
 
 
 
 
 
 
 



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