Service Manuals, User Guides, Schematic Diagrams or docs for : TOSHIBA Proj TV 50PH46P Toshiba+43PH46P,+50PH46P+Chassis+WH4
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FILE NO. 030-200407
SERVICE MANUAL
Projection Television
WH4 Chassis
43PH46P
50PH46P
Published in Japan, Jun. 2004 (YC)
TABLE OF CONTENTS
CHAPTER 1 GENERAL ADJUSTMENTS
SAFETY INSTRUCTIONS ........................................................................................................................................ 3
CRT ASSEMBLY REPLACEMENT AND MOUNTING ............................................................................................. 4
PICTURE TUBE COMPONENTS ADJUSTMENT .................................................................................................... 6
SERVICE POSITION ................................................................................................................................................ 9
SERVICE MODE .................................................................................................................................................... 10
DESIGN MODE ...................................................................................................................................................... 13
ELECTRICAL ADJUSTMENT ................................................................................................................................ 14
CONVERGENCE ADJUSTMENT .......................................................................................................................... 21
SCREEN AND MIRROR ALIGNMENTS ................................................................................................................ 28
CIRCUIT CHECKS ................................................................................................................................................. 29
CHAPTER 2 SPECIFIC INFORMATIONS
SETTING & ADJUSTING DATA .............................................................................................................................. 30
LOCATION OF CONTROLS ................................................................................................................................... 31
MECHANICAL DISASSEMBLY .............................................................................................................................. 33
CHASSIS AND CABINET REPLACEMENT PARTS LIST ...................................................................................... 34
PC BOARDS BOTTOM VIEW ................................................................................................................................. 52
TERMINAL VIEW OF TRANSISTORS ................................................................................................................... 62
CIRCUIT BLOCK DIAGRAM .................................................................................................................................. 64
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 2. The only source of X-RAY RADIATION in this TV receiver
X-RAY RADIATION. To avoid such hazards, the high volt- is the picture tube. For continued X-RAY RADIATION pro-
age must not be above the specified limit. The nominal value tection, the replacement tube must be exactly the same
of the high voltage of this receiver is (A) kV at zero beam type tube as specified in the parts list.
current (minimum brightness) under a (C) V AC power source. 3. Some part in this receiver have special safety-related char-
The high voltage must not, under any circumstances, ex- acteristics for X-RAY RADIATION protection. For contin-
ceed (B) kV. ued safety, parts replacement should be undertaken only
Refer to table-1 for high voltage (A), (B) & AC voltage (C). after referring to the PRODUCT SAFETY NOTICE below.
(See SETTING & ADJUSTING DATA on page 30)
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 read-
ing 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.
PRODUCT SAFETY NOTICE
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 char-
acteristics 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.
R G B
Attention Serviceman
The Hex Head
Bolts with
Springs. (see
sketch) used on
8 o'clock CRT assembly,
are "NOT"
Adjustment Screws
4 o'clock DO NOT LOOSEN-FLUID
LEAKAGE WILL OCCUR.
4 Screws
Lens Assembly 4 Screws
CRT Assembly
CRT Anode Cap 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. Anode Cap
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 An-
ode Cap as illustrated.
Silicon
CAUTION: Align the Anode cable as illustrated on page (On shaded area)
4. TSE3843W #23960136
ADJUSTING PROCEDURE IN REPLACING CRT
1. R.G.B. CUTOFF (SCREEN VR) ADJUSTMENT (page 6.)
2. R.G.B. FOCUS ADJUSTMENT (page 6.)
3. PICTURE TILT ADJUSTMENT (page 7.)
4. USER CONVERGENCE CENTER CHECK
(Refer to owner's manual.)
5. CENTERING ADJUSTMENT (page 7.)
6. CONVERGENCE ADJUSTMENT (page 21.)
7. WHITE BALANCE ADJUSTMENT (page 14.)
Adjustments are complete.
2 ~ 5 mm
15 ~ 25 mm
SERVICING PRECAUTIONS
Do not use a magnetized screw driver for screws When replacing the anode cap assembly (CRT) or
of Deflection Yoke and Velocity Modulation Coil to anode lead assembly (F.B.T.), remove the anode
avoid magnetization of electron gun. lead holder from old one and attach the holder
Magnetization of electron gun will degrade basic again to new anode lead.
function and result in unbalance of right and left
shift of user static convergence, and result in no
variable quantity. Check the point of anode lead in a straight
line, if it is winding, please revise it.
Screw for
D.Y Anode lead holder
Screw for SVM coi
-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.
PICTURE TUBE COMPONENTS ADJUSTMENT
ADJUSTING PROCEDURE IN REPLACING CRT RGB FOCUS ADJUSTMENT
Cutoff User convergence center check 1. Call-up the adjustment mode (see page 10)
2. Press a button on the remote controller in order to display
Centering (PAL) the internally-generated cross-hatch (See TEST SIGNAL
Lens focus
SELECTION on page 11.)
Convergence adjustment 3. Expose only RED by covering the GREEN and BLUE
Electrical focus
(PAL/NTSC) lenses with caps.
4. Loosen the RED lens fixing screws (refer to Fig. a), and
Yoke horizontal White balance adjust the RED lens focus to obtain the sharpest point
while observing the middle and peripheral sections of the
Sub bright adjustment screen.
End
DESCRIPTION OF NECK COMPONENTS
1
2
Fig. a
5. Use the focus VR of "R" of the focus pack in order to adjust
the electric focus in the middle and peripheral sections of
S.V.M. COIL the screen to its sharpest level.
6. Check the RED focus of the whole screen and if necessary
1 Deflection yoke and convergence yoke.
repeat steps 4 and 5.
The position on the neck is required most front (CRT fun-
7. Fix the RED lens by tightening its fixing screws.
nel side) and the screw is fastened after rotating yoke
8. Expose only GREEN by covering the RED and BLUE
adjusting picture tilt.
lenses with caps.
2 Centering magnet
9. Display the internally-generated cross-hatch signal.
After adjusting picture tilt, picture position is finally fixed
10. Adjust the GREEN lens focus on the left border of the
by this magnet.
screen to its sharpest level, then check the focus on the
In order to get maximum margin of user convergence con-
right border, and if it is at its sharpest level, fix it in that
trol for center of screen, this magnet have to be used for
position by tightening the lens screws.
center convergence adjustment.
PREPARATION (1) If the horizontal line toward the right border is red-
Operate the receiver for at least 5 minutes. flared, turn the lens screw slightly right in order to
balance it with the left border. (After adjustment, the
R, G, B CUTOFF (SCREEN VR) ADJUSTMENT left border tends to be slightly green-flared, and the
1. Adjust before replace the screen assembly. right border tends to be slightly red-flared.)
2. Set user control to reset position. (2) If the horizontal line toward the right border is green-
CONTRAST Max flared, turn the lens screw slightly left in order to
( BRIGHTNESS, COLOR, TINT Center. ) balance it with the left border. (After adjustment, the
3. Call up the adjustment mode display, then select the left border tends to be slightly red-flared, and the
item RCUT. right border tends to be slightly green-flared.)
4. Adjust the data of items RCUT, GCUT, and BCUT to
"40H". Note: The aim of the above-described adjustment procedure
5. Press the button on Remote. (Y-MUTE : ON)
for the Green lens focus is to obtain the best lens focus
6. Gradually rotate R, G and B screen volume of FOCUS
after 2 - 3 hours of warming up taking into account the
PAC clockwise or counterclockwise until the raster
appears slightly on the CRT through the each lens, and focus drift; it applies if the warming up time before the
leave them. adjustment is less than 30 minutes. (The horizontal line
(Lookin to the lens in order to check the raster.) in the screen middle section tends to be slightly red-
7. Press the button on Remote. (Return to Normal flared.)
Picture)
-6-
In case of warming up of more than 2 hours under a condition Note: Keep in mind that only the BLUE electric focus is ad-
that the large anode current is running through the projection justed with the black cross-hatch.
tube so that for example the all-white pattern appears, adjust
to obtain the sharpest focus while observing the whole screen 20. Check the BLUE focus of the whole screen and if neces-
like in the RED case. sary repeat steps 17 and 19.
21. Fix the BLUE lens by tightening its fixing screws.
11. Press a button on the remote controller in order to display
the internally-generated black cross-hatch. (See TEST
SIGNAL SELECTION on page 11.) TILT ADJUSTMENT
Rotate R, G, B deflection yoke so that picture becomes hori-
zon, then fasten screw.
CENTERING ADJUSTMENT
1. Stretch a thread between two center of screen edge (top
and bottom, left and right).
12. Use the focus VR of "G" of the focus pack in order to ad-
just the electric focus in the middle section of the screen
to its sharpest level.
Note: Normally the most clearly visible point of the scanning
2. Select the adjustment mode. (See page 10.)
line is the sharpest point of the Green focus, however as
3. Press a button on the Remote Control to display the black
the characteristics vary depending on the projection tube,
cross-hatch.
the sharpest focus points of the vertical and horizontal
lines may not match each other, thus when you turn the
focus VR, if the picture tends to be tremendously unstable
(rolls horizontally or vertically), adjust the balance of the
vertical and horizontal lines to its best position.
13. Check the GREEN focus of the whole screen and if
necessary repeat steps 10 and 11.
14. Fix the GREEN lens by tightening up its fixing screws.
15. Expose only BLUE by covering the RED and GREEN
lenses with caps.
16. Press a button on the remote controller in order to display
the internally-generated cross-hatch (See TEST SIGNAL
SELECTION on page 11.)
17. Loosen the BLUE lens fixing screws (refer to Fig. a), and 4. Adjust G centering magnet so that the cross-hatch pat-
adjust the BLUE lens focus while observing the middle tern center comes to screen center.
and peripheral screen sections. 5. Perform HEIGHT adjustment . (See page 14.)
18. Press a button on the remote controller in order to display 6. Perform WIDTH adjustment. (See page 14.)
the internally-generated black cross-hatch (See TEST SIG- 7. Check whole quality of green line.
NAL SELECTION on page 11.) 8. Adjust R, B centering magnet so that the cross-hatch pat-
19. Use the focus VR of "B" of the focus pack in order to adjust tern center comes to screen center.
the focus in the middle section of the screen to its sharpest
level.
(The point of the Blue focus becomes sharpest when the
brightness level of BLUE is lowest, the cross-hatch is
clearly visible.)
-7-
LOCATION OF SCREEN AND FOCUS VR'S
To remove the Speaker grille and Front panel.
R G B
SCREEN VR's
FOCUS VR's
Speaker grille
REPLACEMENT OF HIGH VOLTAGE CABLE
1. When replacing Anode Lead or Anode Cap with new
one, remove Lead Holder from old lead as shown in
ANODE LEAD figure below, and put it on new lead. Do not throw away
Lead Holder.
NOTE : THE LEAD HOLDER IS ATTACHED TO
RUBBER BOOT TPA5011AH (Z450), BUT IS NOT ATTACHED
TO ANODE LEAD AND ANODE CAP.
RUBBER BOOT IS ATTACHED TO ANODE
LEAD HOLDER AND LEAD ANODE CAP.
2. Detaching Lead Holder
OLD
RUBBER BOOT ANODE LEAD
or
ANODE CAP
Fig. a LOCK LEAD HOLDER Cut here rubber boot
and lead together to
Z450 TPA5007 detach Lead Holder.
Fig. b
-8-
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "SAFETY PRE-
CAUTION" AND "PRODUCT SAFETY NOTICE" ON PAGE 3 OF THIS MANUAL.
SERVICE POSITION
In order to assure the performance, processed wires shall be replaced after the repair work.
Work procedures are as follows:
1. Remove the back board.
2. Remove lead wires.
3. Draw out the chassis.
4. Rest the chassis against the back cabinet, chassis as shown bellow.
After repair work finished, replace it in the opposite procedure.
-9-
SERVICE MODE
1. ENTERING TO SERVICE MODE
1) Press o button once on 2) Press o button again to 3) While pressing the o button,
Remote Control. keep pressing. press MENU button on TV set.
Item S
Data
or Sound Mute
(Service mode display)
2. DISPLAYING THE ADJUSTMENT MENU
1) Press MENU button on TV.
Service mode Adjustment mode
Item
S Press Data
Press
3. KEY FUNCTION IN THE SERVICE MODE
The following key entry during display of adjustment menu provides special functions.
Screen adjustment mode ON/OFF: -/-- ( ) button (on Remote)
Test signal selection : a button (on Remote)
Selection of the adjustment items : Channel s/t (on TV or Remote)
Change of the data value : Volume ; +/◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo