Toshiba 57H83, 65H83 Service Manual
FILE NO. 020-200307
DOCUMENT CREATED IN JAPAN, Apr., 2003
SERVICE MANUAL
COLOR TELEVISION
N3PSP Chassis
51H83, 57H83, 65H83
(TAC0353)(TAC0351)(TAC0352)
CHAPTER 1 GENERAL ADJUSTMENTS
SAFETY INSTRUCTIONS .............................................................................................................................................. 3
CRT ASSEMBLY REPLACEMENT AND MOUNTING ................................................................................................... 4
PICTURE TUBE COMPONENTS ADJUSTMENT.......................................................................................................... 6
REPLACEMENT OF THE CRT....................................................................................................................................... 9
SERVICE MODE .......................................................................................................................................................... 10
ELECTRICAL ADJUSTMENT ...................................................................................................................................... 12
GENERAL ADJUSTMENTS
CONVERGENCE ADJUSTMENT ................................................................................................................................ 13
SCREEN AND MIRROR ALIGNMENTS ...................................................................................................................... 16
CIRCUIT CHECKS ....................................................................................................................................................... 17
CHAPTER 2 SPECIFIC INFORMATIONS
SETTING & ADJUSTING DATA .................................................................................................................................... 18
LOCATION OF CONTROLS ......................................................................................................................................... 19
ADDING CHANNELS TO THE TV'S MEMORY ............................................................................................................ 21
MECHANICAL DISASSEMBLY .................................................................................................................................... 23
TABLE OF CONTENTS
SPECIFIC INFORMATIONS
CHASSIS REPLACEMENT PARTS LIST ..................................................................................................................... 27
PC BOARDS BOTTOM VIEW ...................................................................................................................................... 47
TERMINAL VIEW OF TRANSISTORS ......................................................................................................................... 60
CIRCUIT BLOCK DIAGRAM ........................................................................................................................................ 63
SPECIFICATIONS .................................................................................................................................................... END
APPENDIX:
CIRCUIT DIAGRAM
– 2 –
CHAPTER 1 GENERAL ADJUSTMENTS
SAFETY INSTRUCTIONS
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAU-
TION” AND “PRODUCT SAFETY NOTICE” INSTRUCTIONS BELOW.
X-RAY RADIATION PRECAUTION
1. Excessive high voltage can produce potentially hazardous
X-RAY RADIATION. To avoid such hazards, the high voltage must not be above the specified limit. The nominal
value of the high voltage of this receiver is (A) kV at zero
beam current (minimum brightness) under a 120V AC
power source. The high voltage must not, under any circumstances, exceed (B) kV.
Refer to table-1 for high voltage (A), (B).
(See SETTING & ADJUSTING DATA on page 18)
Each time a receiver requires servicing, the high voltage
should be checked following the HIGH VOLTAGE CHECK
procedure in this manual. It is recommended that the reading of the high voltage be recorded as a part of the service
record. It is important to use an accurate and reliable high
voltage meter.
SAFETY PRECAUTION
WARNING : Service should not be attempted by anyone unfamiliar with the necessary precautions on this receiver. The following are the necessary precautions to be observed before
servicing this chassis.
1. An isolation Transformer should be connected in the power
line between the receiver and the AC line before any service is performed on the receiver.
2. Always discharge the picture tube anode to the CRT conductive coating before handling the picture tube. The picture tube is highly evacuated and if broken, glass fragments
will be violently expelled. Use shatter proof goggles and
keep picture tube away from the unprotected body while
handling.
3. When replacing a chassis in the cabinet, always be certain that all the protective devices are put back in place,
such as; non-metallic control knobs, insulating covers,
shields, isolation resistor-capacitor network etc.
4. Before returning the set to the customer, always perform
an AC leakage current check on the exposed metallic parts
of the cabinet, such as antennas, terminals, screwheads,
metal overlays, control shafts etc. to be sure the set is safe
to operate without danger of electrical shock. Plug the AC
line cord directly into a 120V AC outlet (do not use a line
isolation transformer during this check). Use an AC voltmeter having 5000 ohms per volt or more sensitivity in the
following manner:
PRODUCT SAFETY NOTICE
2. This receiver is equipped with a Fail Safe (FS) circuit which
prevents the receiver from producing an excessively high
voltage even if the B+ voltage increases abnormally. Each
time the receiver is serviced, the FS circuit must be checked
to determine that the circuit is properly functioning, following the FS CIRCUIT CHECK procedure in this manual.
3. The only source of X-RAY RADIATION in this TV receiver
is the picture tube. For continued X-RAY RADIATION protection, the replacement tube must be exactly the same
type tube as specified in the parts list.
4. Some part in this receiver have special safety-related characteristics for X-RAY RADIATION protection. For continued safety, parts replacement should be undertaken only
after referring to the PRODUCT SAFETY NOTICE below.
Connect a 1500 ohm 10 watt resistor, paralleled by a 0.15
µF, AC type capacitor, between a known good earth ground
(water pipe, conduit, etc.) and the exposed metallic parts,
one at a time. Measure the AC voltage across the combination of 1500 ohm resistor and 0.15 µF capacitor. Reverse the AC plug at the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Voltage
measured must not exceed 0.675 volts rms. This corresponds to 0.45 milliamp. AC. Any value exceeding this limit
constitutes a potential shock hazard and must be corrected
immediately.
AC VOLTMETER
0.15µF
Place this probe on
Good earth ground
such as a water
pipe, conduit, etc.
1500 ohm
10 watt
each exposed
metallic part.
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These characteristics are
often passed unnoticed by a visual inspection and the protection afforded by them cannot necessarily be obtained by using
replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this manual and its supplements; electrical components having such features are identified by the
international hazard symbols on the schematic diagram and the parts list.
Before replacing any of these components, read the parts list in this manual carefully. The use of substitute replacement
parts which do not have the same safety characteristics as specified in the parts list may create shock, fire, X-ray radiation or other hazards.
– 3 –
CRT ASSEMBLY REPLACEMENT AND MOUNTING
CAUTION : DO NOT LOOSEN THE HEX HEAD BOLTS WITH SPRINGS (12 PCS), BECAUSE THOSE ARE FOR
SEALING OF CRT COOLANT.
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
Lens Assembly
R
GB
Attention Serviceman
The Hex Head
Bolts with
Springs. (see
sketch) used on
CRT assembly,
are NOT
Adjustment Screws
DO NOT LOOSEN-FLUID
LEAKAGE WILL OCCUR.
4 Screws
4 Screws
CRT Assembly
S.V.M. Coil
CRT DRIVE Board
CRT Mounting
Deflection Yoke and Conver Yoke
Lens and Neck Components View
– 4 –
TO REMOVE CRT (Same procedure for R, G, B)
1. Remove CRT DRIVE Board, S. V. M. COIL and
DEF. YOKE from CRT.
2. Remove Lens Assembly.
3. Detach CRT Anode Cap from CRT.
4. Remove CRT Assembly from CRT Mounting.
CRT REPLACEMENT (Same procedure for R, G, B)
Reverse the removal procedures except the followings.
1. Anode Cable should be replaced with new one.
See “SERVICING PRECAUTIONS” shown below.
2. Install silicon (T461B) to the CRT, replace the Anode
cable and put enough silicon again on around the Anode Cap as illustrated.
CAUTION: Align the Anode cable as illustrated on page
4.
ADJUSTING PROCEDURE IN REPLACING CRT
1. R.G.B. FOCUS ADJUSTMENT (page 7.)
2. PICTURE TILT ADJUSTMENT (page 7.)
3. USER CONVERGENCE CENTER CHECK
(See owner's manual.)
4. CENTERING ADJUSTMENT (page 7.)
5. CONVERGENCE ADJUSTMENT (page 13.)
6. WHITE BALANCE ADJUSTMENT (page 12.)
Adjustments are complete.
Anode Cap
GENERAL ADJUSTMENTS
Silicon
(On shaded area)
TSE3843W #23960136
SERVICING PRECAUTIONS
■ Do not use a magnetized screw driver for screws
of Deflection Yoke and Velocity Modulation Coil to
avoid magnetization of electron gun.
Magnetization of electron gun will degrade basic
function and result in unbalance of right and left
shift of user static convergence, and result in no
variable quantity.
2 ~ 5 mm
SPECIFIC INFORMATIONS
15 ~ 25 mm
■ When replacing the anode cap assembly (CRT) or
anode lead assembly (F.B.T.), remove the anode
lead holder from old one and attach the holder
again to new anode lead.
■ Check the point of anode lead in a straight
line, if it is winding, please revise it.
Screw for
D.Y
Screw for SVM coil
Anode lead holder
– 5 –
WARNING : BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRE-
CAUTION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF THIS MANUAL.
DESCRIPTION OF NECK COMPONENTS
GENERAL ADJUSTMENTS
Deflection yoke and convergence yoke
The position on the neck is required most front
(CRT funnel side) and the screw is fastened after
rotating yoke adjusting picture tilt.
Centering magnet
After adjusting picture tilt, picture position is finally
fixed by this magnet.
In order to get maximum margin of user conver-
SPECIFIC INFORMATIONS
gence control for center of screen, this magnet
have to be used for center convergence adjustment.
PICTURE TUBE COMPONENTS ADJUSTMENT
PREPARATION
Operate the receiver for at least 5 minutes.
– 6 –
R, G, B FOCUS ADJUSTMENT
1. Before adjusting the R, G, B FOCUS, remove the 4 screws
of Lens Assembly which is fixed on the CRT Assembly.
(See page 4.)
Then turn around the Lens Assembly by 180˚ to adjust
the fastening screw (Fig. a) and fasten the 4 screws to
secure Lens Assembly.
2. Select the adjustment mode. (See page 10.)
3. Press “7” button to display the built-in cross-hatch.
4. Press “0” and “RTN” buttons to make the picture a single
Red color.
100 button ................ to erase Red color
0 button .................... to erase Green color
RTN button .............. to erase Blue color.
5. Loosen the fasten screw and adjust Red lens focus to best
focusing point of picture center. Then fasten the screw.
(See Fig. a.)
Fig. a
6. Adjust FOCUS VR “R” of FOCUS PACK to find best focusing point of picture center.
7. Repeat steps 3 to 5 for Green and Blue colors.
TILT ADJUSTMENT
Rotate R, G, B deflection yoke so that picture becomes horizon, then fasten screw.
CENTERING ADJUSTMENT
1. Stretch a thread between two center of screen edge (top
and bottom, left and right).
GENERAL ADJUSTMENTS
2. Receive NTSC.
Then select SERVICE MODE. (See Page 10.)
3. Select CONVERGENCE ADJUSTING mode, and press
"7" button to display the internal net pattern.
Move Cursol and recognize horizontal line indicated Y:4.
This line is vertical center. Push "9" button to display the
vertical stripes, and recognaize horizontal center.
SPECIFIC INFORMATIONS
4. Perform VCEN adjustment. (See page 12.)
5. Adjust G centering magnet so that the cross-bar pattern
center comes to screen center.
6. Perform HEIGHT adjustment . (See page 13.)
7. Perform VERT. LINEARITY adjustment.
8. Perform WIDTH adjustment. (See page 12.)
9. Check whole quality of green line.
10
. Adjust R, B centering magnet so that the cross-bar pat-
tern center comes to screen center.
– 7 –
LOCATION OF SCREEN AND FOCUS VR’S (57", 65")
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
LOCATION OF SCREEN AND FOCUS VR’S (46", 51")
SCREEN VR
FOCUS VR
RGB
Cover
Speaker grille
Cover
Speaker grille
RGB
FOCUS VR
SCREEN VR
– 8 –
REPLACEMENT OF THE CRT
Service parts are provided for each R, G and B.
The contents of the parts are as follows.
HITACHI
CRT 23008174 23008175 23008176
RG B
REPLACEMENT OF HIGH VOLTAGE CABLE
ANODE LEAD
RUBBER BOOT
LEAD HOLDER
Z450 TPA5007
Fig. a
1. When replacing Anode Lead or Anode Cap with new one,
remove Lead Holder from old lead as shown in figure
below, and put it on new lead. Do not throw away Lead
Holder.
NOTE : THE LEAD HOLDER IS ATTACHED TO TPA5007
(Z450), BUT IS NOT ATTACHED TO ANODE
LEAD AND ANODE CAP. RUBBER BOOT IS ATTACHED TO ANODE LEAD AND ANODE CAP.
2. Detaching Lead Holder
RUBBER BOOT
LOCK LEAD HOLDER
Fig. b
Cut here rubber boot
and lead together to
detach Lead Holder.
OLD
ANODE LEAD
or
ANODE CAP
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
– 9 –
1. ENTERING TO SERVICE MODE
1) Press MUTE button twice
on Remote Control.
MUTE
SERVICE MODE
2) Press MUTE button
again to keep pressing.
3) While pressing the MUTE button,
press MENU button on TV set.
S
(Service mode display)
GENERAL ADJUSTMENTS
2. DISPLAYING THE ADJUSTMENT MENU
1) Press MENU button on TV.
Service mode
3. KEY FUNCTION IN THE SERVICE MODE
The following key entry during display of adjustment menu provides special functions.
SPECIFIC INFORMATIONS
Screen adjustment mode ON/OFF: TV (ANT)/VIDEO button (on TV)
Selection of the adjustment items : Channel s/t (on TV or Remote)
Change of the data value : Volume s/t (on TV or Remote)
Adjustment menu mode ON/OFF : MENU button (on TV)
Initialization of the memory (QA02) : RECALL+Channel button on TV (s)
Initialization of the self diagnostic data: RECALL+Channel button on TV (t)
“RCUT” selection : 1 button
“GCUT” selection : 2 button
“BCUT” selection : 3 button
“SCNT” selection : 4 button
“SCOL” selection : 5 button
“TNTC” selection : 6 button
Convergence adj : 7 button
Self diagnostic display : 9 button
Adjustment mode
S
Press
Press
Item
Data
– 10 –
4. SELECTING THE ADJUSTING ITEMS
1) Every pressing of CHANNEL s button in the service mode changes the adjustment items in the order of table-2.
(t button for reverse order)
Refer to table-2 for preset data of adjustment mode.
(See SETTING & ADJUSTING DATA on page 18)
5. ADJUSTING THE DATA
1) Pressing of VOLUME s or t button will change the value of data in the range from 00H to FFH. The variable range
depends on the adjusting item.
6. EXIT FROM SERVICE MODE
1) Pressing POWER button to turn off the TV once.
■ INITIALIZATION OF MEMORY DATA OF QA02
After replacing QA02, the following initialization is required.
1. Enter the service mode, then select any register item.
2. Press and hold the RECALL button on the Remote, then press the CHANNEL s button on the TV. The initialization of QA02
has been complated.
3. Check the picture carefully. If necessary, adjust any adjustment item above.
Perform “Programming Channel Memory” on the owner's manual.
CAUTION: Never attempt to initialize the data unless QA02 has been replaced.
7. SELF DIAGNOSTIC FUNCTION
1) Press “9” button on Remote Control during display of adjustment menu in the service mode.
The diagnosis will begin to check if interface among IC’s are executed properly.
2) During diagnosis, the following displays are shown.
GENERAL ADJUSTMENTS
SELF CHECK
NO. 23 * * * * * *
POWER : 000
BUS LINE : OK
BUS CONT : OK
BLOCK : MAIN SUB
SET ID : 01
EEP VER : 02
OPT1 : 05 OPT2 : 70
DVI
NO * * * * * * * *
ERR CODE : \\\\\\
IR BLASTER VER : NG
Part number of microprocessor (QA01)
Operation number of protection circuit (current limiter) . . . . “000” is normal.
BUS line check “OK” ................... Normal
“SCL-GND” or “NG” ........... SCL-GND short circuit
“SDA-GND” or “NG” ........... SDA-GND short circuit
“SCL-SDA” or “NG” ............ SCL-SDA short circuit
BUS line ACK (acknowledge) check
“OK” ..................... Normal
Display of Location Number . . . . NG
(Display example)
“QA02 NG”, “H001 NG”, “Q501 NG” etc.
Note: The indication of failure place is only one place though failure places are plural. When
repair of a failure place finishes, the next failure place is indicated. (The order of priority of
indication is left side.)
Sync. signal check Green display..... Normal
Red display ........ NG
MAIN ........ Main sync
SUB .......... Sub sync (when turn on the PIP)
ID code for TV Set
Version of "EEP"
Data for "OPT"
Part number of DVI microprocessor (Q203)
DVI error code ........ "\\\\\\" is normal. (When DVI signal is received)
Version of IR braster IC ("NG" is displayed for models without TheaterLink.)
SPECIFIC INFORMATIONS
– 11 –
ELECTRICAL ADJUSTMENT
ITEM ADJUSTMENT PROCEDURE
VERTICAL POSITION
(VPSI)
WIDTH
(WID)
GENERAL ADJUSTMENTS
SUB-BRIGHTNESS
(BRTC)
HEIGHT
(HIT)
SPECIFIC INFORMATIONS
1. Receive NTSC signal.
2. Connect he probe of digital voltmeter to TP-V and TP-G on SIGNAL Board.
3. Call up the adjustment mode display, then select the item VCEN.
4. Press the VOLUME s or t button to get the voltage 0±10 mV.
1. Receive NTSC signal.
2. Select the "FULL" mode by PIC SIZE button on Remote Control.
3. Call up the adjustment mode display, then select the item WID.
4. Press the VOLUME s or t button to get the picture so that left and right eddes of video
signal begin to lack.
5. Press the VOLUME s button to advance the data by 8 steps.
NOTE: Check the horizontal picture position is correct.
1. Receive the air signal or aux Video signal.
2. Enter sports mode on user menu.
3. Enter the service mode, then select “BRTC” register.
4. Adjust the data to set dark area of picture to proper level.
1. Receive NTSC signal.
2. Select the "FULL" mode by PIC SIZE button on Remote Control.
3. Call up the adjustment mode display and select the item HIT.
4. Press the VOLUME s or t button to get the picture so that top and bottom of video signal
begin to lack.
5. Press the VOLUME s button to advance the data by 8 steps.
Note: Check the vertical picture position is correct.
Adjust the data of height after vertical linearty.
VERTICAL LINEARITY
(VLIN)
(FULL mode only)
WHITE BALANCE
(RCUT)
(GCUT)
(BCUT)
(RDRV)
(BDRV)
1. Receive cross-hatch pattern.
2. Call up the adjustment mode display, then select the item VLIN.
3. Press the VOLUME s or t button to obtain the
picture of the best linearity.
4. Then readjust the item HIT.
1. Press RESET button on TV or remote hand set.
2. Call up the adjustment mode display, then adjust the data of items RCUT, GCUT and BCUT
to “80”.
3. Press TV (ANT)/VIDEO button on TV.
4. Gradually rotate R, G and B SCREEN volume of FOCUS PAC (page 9) clockwise or
counterclockwise until the raster appears slightly on the CRT through the each lens, and
leave them.
(Look into the lens in order to check the raster.)
5. Press TV (ANT)/VIDEO button on TV again.
6. Exit from service mode.
7. Receive white laster pattern signal, and adjust the contrast to the minimum to make white
picture to low light.
8. Adjust the data of items RCUT, GCUT and BCUT for low light area.
9. Adjust the contrast to the maximum to make white picture to high light.
10. Adjust the data of items RDRV and BDRV Controls for proper white-balanced picture in high
light area.
11. Check the white balance in both low and high light areas. If necessary, perform again steps
from 7 to 9.
– 12 –
CONVERGENCE ADJUSTMENT
1. Receive NTSC signal.
2. Enter to the service mode. (See Page 10.)
RCUT
40H
3. Press "7" button to enter the convergence adjusting mode,
and the internal net pattern will be displayed. Then, press
"9" button to display veritcal stripes.
4. Select the point and the color by pressing following buttons. (Cursor should be blinking.)
"2", "8", "4", "6" : To select point
"3" : To select color
5. Then press "5" button, and adjust the convergence by
pressing following buttons. (Cursor should not be
blingking.)
"2", "8", "4", "6" : To adjust convergence
"3" : To select color
6. Repeat from steps 3 to 4 until the convergence and the
geometry become fine. (See Page 14.)
7. Press "7" button to momorize the adjusted data.
8. Message of "PLEASE PUSH TOUCH FOCUS" will be displayed, and press TOUCH FOCUS button which is located
on the front panel.
9. TOUCH FOCUS CALIBRATION will start.
10. Soon message of "CALIBRATION FINISHED" will be displayed, and then a normal picture will be displayed.
11. Then push TOUCH FOCUS button again, and confirm that
the convergence does not change.
EXPLANATION OF KEY-FUNCTION IN THE CONVERGENCE ADJUSTMENT MODE
Load BACK UP DATA: 1 button
Up : 2 button
Selet Green color: 3 button
Left : 4 button
Blinking of cursor ON/OFF: 5 button
Right: 6 button
Adjust mode ON/OFF: 7 button
Down: 8 button
Vertical stripe ON/OFF 9 button
Erase Green line: 0 button
Erase Red line: 100 button
Erase Blue line: ENT button
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
Note: If message of "TOUCH FOCUS ERROR" is displayed,
1) Check the connection between four sensors and
Convergence Unit.
2) Check the geometry of internal net pattern. (See Page
14.)
If any problem cannnot be found, hardware might have
problem.
– 13 –
DEFLECTION and CONVERGENCE
5
7
ITEM NAME SETTING
VPS1
VERTICAL
Raster
centering
Adjusment
Centering
Adjusment
WID
Horizontal
Adjustment
GENERAL ADJUSTMENTS
HIT
VLIN
(FULL)
Vertical
Adjustment
(FULL)
Conver-
SPECIFIC INFORMATIONS
gence
CONTRAST:MAX
BRIGHNESS:CNT
COLOUR :CNT
TINT :CNT
CONTRAST:MAX
BRIGHNESS:CNT
COLOUR :CNT
TINT :CNT
PIC SIZE :FULL
CONTRAST:MAX
BRIGHNESS:CNT
COLOUR :CNT
TINT :CNT
PIC SIZE :FULL
CONTRAST:MAX
BRIGHNESS:CNT
COLOUR :CNT
TINT :CNT
PIC SIZE :FULL
INPUT
SIGNAL POINT
Retma
Signal
TEST
Between
TP-G to
TP-V
Retma
Signal
Retma
Signal
Retma
Signal
Retma
Signal
Picture
Adjustment
Picture
Adjustment
Picture
Adjustment
Picture
Adjustment
MEASUREMENT
INSTRUMENT
Digital Volt
Meter
Picture
To adjust the voltage between TPG and TP-V
1. To adjust the Magnet about
Adjustment
2. To adjust each R, G, B.
Picture
Adjustment
To adjust the Horizontal Amplitude
by WID.
Picture
Adjustment
Picture
Adjustment
Refer to the following (Convergence Net Geometry)
ADJUSTMENT METHOD
Horizntal position and Vertical
position should center of picture.
3
20
1
25
30
30
35
325
7531
575 300
35
30
30
25
20
525 LINE
35
45
30
30
20
30
35
50
35
30
1
3
20
25
30
531
30
25
20
ADJUSTMENT
SPEC
0 ± 10mV
11 ± 1 bar
Upper ......
Circle of Lion
just touch to
line of Mask.
Bottom ....
To hide the
12 bars by
line of Mask.
CONVERGENCE (51 / 57 / 65 WIDE)
Net Pattern Geometry
Model H size H span
51WIDE 1129.0 549.7 458.1 274.9 91.6 0.0 91.6 274.9 458.1 549.7 91.6
57WIDE 1260.0 613.5 511.3 306.8 102.3 0.0 102.3 306.8 511.3 613.5 102.3
65WIDE 1442.0 702.1 585.1 351.1 117.0 0.0 117.0 351.1 585.1 702.1 117.0
Model 51WIDE 57WIDE 65WIDE
V size 635.085 780.750 810.000
308.0 344.0 392.8
231.0 258.0 294.6
115.5 129.0 147.3
0.0 0.0 0.0
115.5 129.0 147.3
231.0 258.0 294.6
308.0 344.0 392.8
V span 38.5 43.0 49.1
UNIT: mm
– 14 –
NOTES
In many cases, color misconvergence may be corrected by returning HIT and WID data in main deflection side to initial adjusting
values. Following cases will surely require readjustment of convergence.
CRT REPLACEMENT
When CRT is replaced, main deflection readjustment and color matching are required.
Perform following procedures.
1. Replace two CRT’s of blue and red.
2. Perform horizontal adjustment for blue and red yokes on base of green CRT data. Mount yoke and velocity mod. coil alignment, pushing towards CRT without gap.
3. Adjust alignment of blue and red. (Refer Alignment adjustment for details.)
4. Rotating centering magnet, adjust CRT centers of red and blue to CRT center of green.
(Picture position adjustment)
5. Adjust HIT and WID data of main deflection, and decide data at the most precise screen comparing to green data.
6. Adjust convergence of screen picture for color matching. Do not move green one at this time.
7. After convergence adjustment of screen picture finishes, replace green CRT.
For green CRT as well, repeat steps 2 to 5 above on bases of red and blue color matching to adjust convergence.
8. Execute TOUCH FOCUS following instructions displayed on the screen after finishing convergence adjustments of all the
colors.
Note: Press button "7" again after "PLEASE PUSH TOUCH FOCUS" has been displayed. Then, TOUCH FOCUS will not be
executed, and the current state of convergence will be displayed.
REPLACING CONVERGENCE UNIT
1. Confirm that the initial data, which is specified by a model name, is memorized in the new unit.
(It's not allowed to use the data of other models.)
2. Mount the new unit to the SET, and turn the POWER on.
3. Adjust centering magnets, Hight (HIT) and Width (WID). (See Page 7.)
4. Adjust the convergence. (See Page 13.)
GENERAL ADJUSTMENTS
If the memory in the defective module is available, following steps are allowed.
1. Remove the memory (Q173) from the defective unit, and mount it to the new unit.
2. Mount the new unit to the SET, and turn the POWER on.
3. Enter to the convergence adjusting mode, and load BACKUP DATA by pressing "1" button. (See Page 13.)
4. Adjust centering magnets. (See Page 7.)
5. Adjust the convergence. (SeePage 13.)
SPECIFIC INFORMATIONS
– 15 –
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