Toshiba 43S7DE-DT Schematic
FILE NO. 040-200314
SERVICE MANUAL
COLOUR TELEVISION
S7PJ Chassis
43S7DE
,
43S7DT
Oct., 2003
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
GENERAL ADJUSTMENTS
ELECTRICAL ADJUSTMENT ....................................................................................................................................... 14
CONVERGENCE ADJUSTMENT .................................................................................................................................. 20
SCREEN AND MIRROR ALIGNMENTS........................................................................................................................25
CIRCUIT CHECKS ........................................................................................................................................................ 26
CHAPTER 2 SPECIFIC INFORMATIONS
SETTING & ADJUSTING DATA .................................................................................................................................... 27
LOCATION OF CONTROLS .......................................................................................................................................... 28
PROGRAMMING CHANNEL MEMORY........................................................................................................................ 30
TABLE OF CONTENTS
MECHANICAL DISASSEMBLY .....................................................................................................................................32
CHASSIS AND CABINET REPLACEMENT PARTS LIST ............................................................................................. 33
PC BOARDS BOTTOM VIEW........................................................................................................................................49
TERMINAL VIEW OF TRANSISTORS .......................................................................................................................... 56
CIRCUIT BLOCK DIAGRAM ......................................................................................................................................... 59
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 (C) V AC power
source. The high voltage must not, under any circumstances, exceed (B) kV.
Refer to table-1 for high voltage (A), (B) & AC voltage (C).
(See SETTING & ADJUSTING DATA on page 27)
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.
2. 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.
3. 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.
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; nonmetallic 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 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.
GENERAL ADJUSTMENTS
– 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.
RGB
GENERAL ADJUSTMENTS
8 o'clock
4 o'clock
Lens Assembly
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
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.
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.
Anode Cap
CAUTION: Align the Anode cable as illustrated on page
4.
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 20.)
7.
WHITE BALANCE ADJUSTMENT (page 14.)
Adjustments are complete.
Silicon
(On shaded area)
TSE3843W #23960136
15 ~ 25 mm
GENERAL ADJUSTMENTS
2 ~ 5 mm
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.
Screw for
D.Y
Screw for SVM coil
■ 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.
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.
PICTURE TUBE COMPONENTS ADJUSTMENT
ADJUSTING PROCEDURE IN REPLACING CRT
Cutoff
Lens focus
Electrical focus
User convergence center check
Centering (PAL)
Convergence adjustment
(PAL/NTSC)
GENERAL ADJUSTMENTS
Yoke horizontal
DESCRIPTION OF NECK COMPONENTS
2
S.V.M. COIL
1 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.
Insert the anode to FBT.
Insert the CRT drive.
Connect the GND wire to the GND terminal on the CRT
drive
Sub bright adjustment
White balance
End
1
2 Centering magnet
After adjusting picture tilt, picture position is finally
fixed by this magnet.
In order to get maximum margin of user convergence control for center of screen, this magnet have to be used for
center convergence adjustment.
PREPARATION
Operate the receiver for at least 5 minutes.
R, G, B CUTOFF (SCREEN VR) ADJUSTMENT
1. Adjust before replace the screen assembly.
2. Set user control to reset position.
CONTRAST → Max
(
BRIGHTNESS, COLOR, TINT → Center.
3. Call up the adjustment mode (see page 10) display,
then select the item RCUT.
4. Adjust the data of items RCUT, GCUT, and BCUT to
"40H".
5. Press the -/-- button on PJTV. (Y-MUTE : ON)
6. Gradually rotate R, G and B screen volume of FOCUS
PAC clockwise or counterclockwise until the raster
appears slightly on the CRT through the each lens, and
leave them.
(Looking to the lens in order to check the raster.)
7. Press the -/-- button on PJTV. (Return to Normal
Picture)
RGB FOCUS ADJUSTMENT
1. Call-up the adjustment mode (see page 10)
2. Press -/-- button on the remote controller in order to display the internally-generated white cross-hatch (or white
cross-dot). (White cross-hatch or white cross-dot on a black
background. See TEST SIGNAL SELECTION on page 11.)
3. Expose only RED by covering the GREEN and BLUE
lenses with caps.
4. Loosen the RED lens fixing screws (refer to Fig. a), and
adjust the RED lens focus to obtain the sharpest point
while observing the middle and peripheral sections of the
screen.
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
the screen to its sharpest level.
6. Check the RED focus of the whole screen and if necessary repeat steps 4 and 5.
7. Fix the RED lens by tightening its fixing screws.
8. Expose only GREEN by covering the RED and BLUE
lenses with caps.
9. Display the internally-generated white cross-hatch (or white
cross-dot) signal.
10. Adjust the GREEN lens focus on the left border of the
screen to its sharpest level, then check the focus on the
right border, and if it is at its sharpest level, fix it in that
position by tightening the lens screws.
(1) If the horizontal line toward the right border is red-
flared, turn the lens screw slightly right in order to
balance it with the left border. (After adjustment, the
left border tends to be slightly green-flared, and the
right border tends to be slightly red-flared.)
(2) If the horizontal line toward the right border is green-
flared, turn the lens screw slightly left in order to
balance it with the left border. (After adjustment, the
)
– 6 –
left border tends to be slightly red-flared, and the
right border tends to be slightly green-flared.)
GENERAL ADJUSTMENTS
In case of warming up of more than 2 hours under a condition
that the large anode current is running through the projection
tube so that for example the all-white pattern appears, adjust
to obtain the sharpest focus while observing the whole screen
like in the RED case.
11. 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
line is the sharpest point of the Green focus, however as
the characteristics vary depending on the projection tube,
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.
12. Check the GREEN focus of the whole screen and if
necessary repeat steps 10 and 11.
13. Fix the GREEN lens by tightening up its fixing screws.
14. Expose only BLUE by covering the RED and GREEN
lenses with caps.
15. Display the internally-generated black cross-hatch.
16. Loosen the BLUE lens fixing screws (refer to Fig. a), and
adjust the BLUE lens focus while observing the middle
and peripheral screen sections.
17. Use the focus VR of “B” of the focus pack in order to adjust
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.)
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).
2. Select the adjustment mode. (See page 10.)
3. Adjust G centering magnet so that the cross-hatch pattern center comes to screen center.
4. Perform HEIGHT adjustment . (See page 14.)
5. Perform WIDTH adjustment. (See page 14.)
6. Check whole quality of green line.
7. Adjust R, B centering magnet so that the cross-hatch pattern center comes to screen center.
Note: Keep in mind that only the BLUE electric focus is ad-
justed with the black cross-hatch.
18. Check the BLUE focus of the whole screen and if neces-
sary repeat steps 17 and 19.
19. Fix the BLUE lens by tightening its fixing screws.
Note: The aim of the abov
e-descr
ibed adjustment procedure
for the Green lens focus is to obtain the best lens focus
after 2 - 3 hours of warming up taking into account the
focus drift; it applies if the warming up time before the
adjustment is less than 30 minutes. (The horizontal line
in the screen middle section tends to be slightly redflared.)
– 7 –
LOCATION OF SCREEN AND FOCUS VR'S
To remove the Speaker grille and Front panel.
GENERAL ADJUSTMENTS
RGB
FOCUS VR's
SCREEN VR's
Front grille
REPLACEMENT OF HIGH VOLTAGE CABLE
ANODE LEAD
RUBBER BOOT
LEAD HOLDER
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
OLD
ANODE LEAD
or
ANODE CAP
Fig. a
Z450 TPA5007
– 8 –
LOCK
LEAD HOLDER
Fig. b
Cut here rubber boot
and lead together to
detach Lead Holder.
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "SAFETY PRECAU-
TION" 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.
After repair work finished, replace it in the opposite procedure.
GENERAL ADJUSTMENTS
– 9 –
1. ENTERING TO SERVICE MODE
1) Press o button once on
Remote Control.
SERVICE MODE
2) Press o button again to
keep pressing.
3) While pressing the o button,
press MENU button on TV set.
or Sound Mute
GENERAL ADJUSTMENTS
2. DISPLAYING THE ADJUSTMENT MENU
1) Press MENU button on TV.
Service mode
S
3. KEY FUNCTION IN THE SERVICE MODE
The following key entry during display of adjustment menu provides special functions.
Screen adjustment mode ON/OFF: -/-- ("Info") 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 ; +/– (on TV or Remote)
Adjustment menu mode ON/OFF : MENU button (on TV)
Initialization of the memory (QA02) : CALL + Channel button on TV (s)
Reset the count of operating protect
circuit to “00”: CALL + Channel button on TV (t)
“RCUT” selection : 1 button
“GCUT” selection : 2 button
“BCUT” selection : 3 button
“SCNT” selection : 4 button
“COLC” selection : 5 button
“TNTC” selection : 6 button
Convergence adj : YELLOW button
Self diagnostic display ON/OFF : 9 button
Press
Press
Adjustment mode
Item
Data
(Service mode display)
Item
Data
S
Color thickness correction
note: Displayed differently as shown below, de-
pending on the setting of the receiving color
system.
COLP (PAL)
COLC (NTSC)
COLS (SECAM)
CAUTION : Never try to perform initialization unless you have changed the memory IC.
– 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 27)
5. ADJUSTING THE DATA
1) Pressing of VOLUME ; +/– 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 CALL 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 “Auto search Memory” on the owner’s manual.
CAUTION: Never attempt to initialize the data unless QA02 has been replaced.
7. TEST SIGNAL SELECTION
1) Every pressing of a button on the Remote Control changes the built-in test patterns on screen as described below
in SERVICE MODE.
Signals Picture
• Red raster
• Green raster
• Blue raster
• All White
*
The signals marked with are not usable to display in the Test signal for some model.
Signal off
PAL signals (R/G/B/W patterns) (4 patterns)
GENERAL ADJUSTMENTS
– 11 –
8. 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.
Indicated color of mode now selected : Green and Red
<SELF CHECK>
2300****
POWER : 00
BUS LINE : OK
BUS CONT : OK
BLOCK : UV V1 V2 V3
Indicated color of other modes : White
Green : Normal
Red : The microcomputer operates to provide judgement
of no video signal. The red color is still indicated
though the signal is input, failure may exist in input
signal line including QV01.
GENERAL ADJUSTMENTS
Part number of microcomputer (QA01)
Operation number of protecting circuit ----“00” is nor-
mal.
When indication is other than “00”, overcurrent apts to
flow, and circuit parts may possibly be damaged.
BUS LINE ----“OK” is normal.
When "OK" is not displayed here, the communiction
with QA02 is unsuccessful.
BUS CONT ----“OK” is normal.
When indication shows “Q uuu (Green: OK, Red:
NG)”, the device with the number may possibly be damaged.
BLOCK
UV : TV reception mode
V1 : VIDEO 1 input mode (a1)
V2 : VIDEO 2 input mode (a2)
V3 : VIDEO 3 input mode (a3)
The items marked with are not usable to display in the SELF DIAGNOSTIC FUCTION for some model.
*
– 12 –
DESIGN MODE
1. ENTERING TO DESIGN MODE
ITEM
DATA
S D
Press
(Design mode) (Adjustment mode)
Press
3) Press MENU button on TV.
2) While pressing CALL button on Remote
and press MENU button on TV.
1) Select the Service mode.
When QA02 is initialized, items “OPT0” and “OPT1” of DESIGN MODE are set to the data of the representative model of this
chassis family.
Therefore, because ON-SCREEN specification remains in the state of the representative of model. This model is required to
reset the data of item “OPT”.
2. SELECTING THE ADJUSTING ITEMS
Every pressing of CHANNEL t button in the design mode changes the adjustment items in the order of table-3.
(s button for reverse order)
Refer to table-3 for data of design mode.
(See SETTING & ADJUSTING DATA on page 27)
3. ADJUSTING THE DATA
Pressing of VOLUME s or t button will change the value of data.
GENERAL ADJUSTMENTS
– 13 –
ELECTRICAL ADJUSTMENT
ITEM ADJUSTMENT PROCEDURE
WIDTH
(WID)
VERTICAL LINEARITY
(VLIN)
GENERAL ADJUSTMENTS
HEIGHT
(HIT)
1. Receive the Philips pattern.
2. Call up the adjustment mode display, then select the item WID.
3. Press the VOLUME t or s button to get the 7 bars (Left + Right).
Note : Check the horizontal picture position is correct.
1. Call up the adjustment mode display, then select the item VLIN.
2. Receive the cross-hatch signal.
3. Press the VOLUME s or t button
to obtain the picture of the best
linearity.
Center
1. Receive the Philips pattern.
2. Call up the adjustment mode display, then select the item HIT.
3. Press the VOLUME t or s button to get the 7 bars (Left + Right).
WHITE BALANCE
(RCUT)
(GCUT)
(BCUT)
(RDRV)
(BDRV)
Note : Check the vertical picture position is correct.
Black or White pattern
Highlighted area
Adjust "RDRV" or "BDRV" to be white.
Low light area
Fine adjust "RCUT", "GCUT" or "BCUT" to be black.
1. Set user control to reset position.
CONTRAST → Max
(
BRIGHTNESS, COLOR, TINT → Center.
2. Call up the adjustment mode display, then select the item RCUT.
3. Adjust the data of items RCUT, GCUT, and BCUT to "40H".
4. Press the -/-- button on Remote. (Y-MUTE : ON)
5. Gradually rotate R, G and B screen volume of FOCUS PAC clockwise or counterclockwise until the raster appears slightly on the CRT through the each lens, and
leave them.
(Lookin to the lens in order to check the raster.)
6. Press the -/-- button on Remote. (Return to Normal Picture)
7. Receive the raster-signal of black pattern without color burst.
8. Adjust the data of items RCUT, GCUT and BCUT for proper white-balanced picture
at Black pattern.
9. Receive the raster-signal of white pattern without color burst.
10. Adjust the data of items RDRV and BDRV for proper white-balanced picture at
White pattern.
11. Check the white balance in both Black and White patterns.
If necessary, perform again steps from 7 to 10.
)
– 14 –
S7PJ: Series (Reference factory adjustment)
4 lines
3.65 Vop
Adjustment standard
Adjustment procedure
signal.
1) Adjust the number of collapsed black lines of sub-bright
Adjust the amplitude from the pedestal level to the white
peak.
2) This adjustment shall be done after W/B [SCNT] ad-
2.0 Vop
2.5 Vop
Point where the tube
justment.
(Adjust the P-P value of the upper half)
1) Adjustment the amplitude of the rainbow colour bar.
2) Confirm that video muting is made.
for this adjustment.)
3) Adjust the COLC after adjusting the SCNT.
1) Adjust the amplitude of colour bar. (Apply picture mute
2) Adjust the P-P value of the upper half.
Adjust the COLS after adjusting the COLC.
1) Make the surrounding as dark as possible.
starts to glow.
11500K + 0.0075duV
10500K + 0.0105duV
).
2
).
2
DRV. CUT= 40H)
screen VR to the point where the tube starts to be bright.
2) Set to the factory screen adjustment mode (Y mute,
3) Observing the CRT tube surface directly, adjust the
for the best position.
them with a jig.
4) Perform this adjustment for each R, G and B tube.
1) Repeat the electric focus and optical focus adjustments
2) As to CRTs other than the one for the adjustment, shield
3) Perform this adjustment for each R, G and B tube.
Adjust the colour temperature at the bright part
(103cd/m
Adjust the colour temperature at the dark part
(17cd/m
GENERAL ADJUSTMENTS
point
TP46B
Measurement
(J2ch)
Input signal
Sub-bright signal
Setting
DYNAMIC
(User control)
mode
Name
Sub-contrast
Item
Screen
adjustment
(J2ch)
Sub-bright signal
DYNAMIC
mode
Sub-bright center
TP46B
TP46B
(J2ch)
Sub-bright signal
DYNAMIC
mode
Sub-color NTSC
SECAM colour
WIDE mode
DYNAMIC
Sub-colour center
bar
(E2ch)
mode
SECAM
surface
CRT tube
Factory
screen
adjsutment
Screen
mode
Screen
Adjustment
RETMA
DYNAMIC
interlasing)
Dot-cross total
white signal (non-
mode
Focus
Screen
Adjustment
1
1
1
White balance at
bright part
Screen
Adjustment
1
1
White balance at
dark part
[SCNT]
[BRTC]
[COLC]
[COLS]
Screen
adjustment
– 15 –
Focus
adjustment
[RDRV]
[BDRV]
[RCUT]
[BCUT]
Adjustment standard
GENERAL ADJUSTMENTS
7 ± 1 marks
(See Page 7)
32 ± 0.1 kV
Adjustment standard
Adjustment procedure
and djust it to 0 ± 20mV by VCEN data.
1) Connect a digital voltmeter between TP-V and TP-G,
point
Measurement
(PAL-I)
Input signal
Setting
(User control)
and TP-G
Between TP-V
Philips pattern
DYANAMIC
screen comes to the center of the dummy screen (cross
pattern).
biginning until upper and lower flags appear on the
screen.
data until either upper or lower flag end is aligned with
the screen end.
1) Adjust the centering magnet so that the position of
Screen
Philips pattern
DYNAMIC
1) Shorten the vertical amplitude by HIT data in the
Screen
adjustment
(PAL)
Philips pattern
DYNAMIC
2) Subsequently, lengthen the vertical amplitide by HIT
the east
adjustment
Set: Facing to
(PAL)
1) Shorten the amplitude by lowering the WID data in the
Screen
Philips pattern
DYNAMIC
register flags on the left and right of Philips pattern will
come to 7 in total (3.5 each for left and right) when
added.
biginning until left and right flags appear completely.
2) Lengthen the vertical amplitide so that the number of
the east
adjustment
Set: Facing to
(PAL)
center.
(Adjusting the horizontal phase only)
1) Adjsut the Conver Pattern center to the Philips Patttern
Screen
adjustment
Set: Facing to
(PAL)
Philips pattern
DYNAMIC
Adjustment procedure
+5V to the terminals #15 and #16
+9V to the terminals #13
-9V to the terminals #14
center.
(Adjusting the horizontal phase only)
1) Adjsut the Retma Pattern center to the Philips Patttern
the east
Screen
adjustment
(NTSC)
Retoma pattern
DYNAMIC
the east
Set: Facing to
point
Measurement
Input signal
Setting
(User control)
nals of P701.
1) Apply the following voltages to the respective termi-
Q709 emitter
2) By L719, adjust the frequency of the emitter Q709.
Item Name
Voltage
measure-
ment at
vertical
midpoint
Vertical amplitude
adjustment
Vertical amplitude
adjustment
Vertical
position
adjustment
HIT
VLIN
Horizontal
amplitude
adjustment
WID
– 16 –
Conver Pattern
Horizontal phase
adjustment
Conver Pattern
STRP
NSTR
Horizontal phase
adjustment
Unit adjustment : DIGITAL-CONVER
Name
Item
PLL
frequency
adjustment
Viewpoint of WID (adjustment of horizontal amplitude)
Left side
Left flag end
3rd flag
4th flag
1st flag
2nd flag
Right side
GENERAL ADJUSTMENTS
0
0
1st flag
2nd flag
3rd flag
4th flag
Right flag end
Adjust the WID data so that the number of register flags on the left and
right of Phillips pattern will come to 7 in total when added.
Direction of adjustment: Facing to the east
Adjusting method of IF board
Item: AFT
Name of adjustment: Adjustment of AFT/f0
Setting: Adjusting tester
Input signal: 38.0 MHz (CW), 96 dB (uV), 75 Ω at the terminal
Measuring point: TP13 (IF board, #7: AFT line)
Adjustment prcodures:
Send the input signal to #2 (IF input line)
Vary the coil of LI54.
Search the point where the voltage of #7 varies suddenly between 0 V and 5 V.
Adjust the voltage of #7 so as to be 2.5 V ± 0.5 V.
Item: RF AGC
Name of adjustment: Adjustment of RFAGC/DELAY
Setting: Adjusting tester
Input signal: 38.0 MHz (CW), 96 dB, 75 Ω at the terminal
Measuring point: TP15 (IF board, #6: RFAGC line)
Adjustment prcodures:
Send the input signal to #2 (IF input line)
Vary the RI51 of volume.
Adjust the voltage of #6 so as to be 3.0 V ± 0.3 V.
Necessary equipment and instruments
Signal generator which can generate 96 dB (uV) at 38.0 MHz, 75 Ω of the terminal
Voltmeter which measures voltage
– 17 –
Adjustment items Adjusting methods
Focus adjustment
GENERAL ADJUSTMENTS
(Conditions)
• User adjustment : Dynamic mode
• To be performed after centering magnet adjustment.
• Signal :
Lens : R .... Internal-house Dot-Cross Pattern (PAL) G
G.... Internal-house Dot-Cross Pattern (PAL)
B .... Internal-house Dot-Cross Pattern (PAL)
Electrical focus : R .... Internal-house Dot-Cross Pattern (PAL)
G.... Internal-house Dot-Cross Pattern (PAL)
B .... Internal-house Dot-Cross Pattern (PAL)
(Adjustment)
1. Common item
1) Make coarse adjustments in advance on the lens focus and electrical
focus of each R, G, and B tube.
2. G adjustment
1) Set to the G monochrome by lens cap.
2) Receive the image of internal-house dot-cross.
3) Adjust the G electric focus.
Adjust the G electrical focus by the focus volume of focus block (Z410) so
that the screen center will come to optimum focus.
(Although the G electrical focus is to be adjusted to allow the scanning
lines in the center of the screen to be seen most clearly, if G alignment
and astigmatism are inferior with the appearance of vertical and horizontal flares in the center of and around the screen and if the lines become
thicker, adjust to the best point observing the entire screen.)
4) Adjust the G lens focus.
Keep an eye on the center of the dot-cross pattern and adjust so that the
screen center will become clear.
As a rough guide to decrease unevenness, adjust so that red flares on
both sides of the crosshatch line will come to 1mm in thickness.
5) Repeat 3, 4, and attempt to further improve the focus quality.
– 18 –
Adjustment items Adjusting methods
Focus adjustment
3. R adjustment
1) Set to the R monochrome by lens cap.
2) Receive the image of internal-house dot-cross.
3) Adjust the R electrical focus.
Adjust by focus volume of the focus block (Z410) so that the screen center
will come to optimum focus.
4) Adjust the R lens focus.
Adjust so that the screen center will become the best.
5) Repeat 3, 4, and attempt to further improve the focus quality.
4. B adjustment
1) Set to the B monochrome by lens cap.
2) Receive the image of internal-house dot-cross.
2/3L
L
3) Adjust the B electrical focus.
Adjust by focus volume of the focus block (Z410) so that the screen center
will come to optimum focus.
Make adjustment so that the scanning lines are to be seen most clearly at the
position of 2/3L left side from the center of the screen.
At this time, find the best fucus point. Then, adjust the VR clockwise once,
subsequently adjust the VR counterclockwise, and stop the VR at the best
point.
GENERAL ADJUSTMENTS
4) Adjust the B lens focus.
Pay attention to the center of internal-house dot-cross.
First of all, make coarse adjustments of the lens, and move the lens adjusting
screw to the right at the point being considered as the best focus. Then, the lines
of the border become clear. Check and confirm under the circumstance that a
flare appears.
On the contrary, if the lens adjusting screw is moved to the left from the situation,
the flare will disappear, and at this point you will find a point from which the borderline itself begins to go out of focus. Adjust to the very point where the focus begins
to go out.
– 19 –
CONVERGENCE ADJUSTMENT
1. PICTURE ADJUSTMENT
The adjustment are done on two screens; 50 Hz mode (PAL)
and 60 Hz mode (NTSC). To synchronize correction wave to
each frequency, receive the suitable signal.
Note: The convergence circuit is a circuit to eliminate screen
distortion and can not make a drastic correction such
as to correct entire screen size. An excessive correction
may actuate the protection circuit. So a care will be
necessarry.
2
1-1. Change of Memory (E
2
Memory of Q711 E
GENERAL ADJUSTMENTS
PROM is nonvolatile, and adjusted data is
stored. Since data in RAM of Q701 is eliminated with power
OFF, the RAM is set by soft command of micro-processor QA01
at every power ON. The adjusted data which is obtained from
screen-watching is once stored in RAM inside Q701. The whole
data in RAM which is corrected on each adjusting point and is
changed, is saved into E
data capacity per one screen requires 8k for 50 Hz mode (PAL),
and 4k for 60 Hz mode (NTSC).
PROM)
2
PROM (Q711) as a fixed data. The
1-2. Service Mode
1-2-1. Outline
Service mode is controlled by software of micro-processor
QA01, and is one of function of set.
This mode is designed so that ordinary user cannot use this,
and special operation is required to use this.
Data change is done by direct shift (cursor display) of adjusting points; 50 Hz mode (PAL) 8 x 8/1 color and 60 Hz mode
(NTSC) 8 x 7/1 color.
1-2-2. To Enter and to Exit
Press mute (
o) key on remote hand unit at twice, and keep
pressing, then press MENU key of set console. The service
data will be display on the top left screen. Under this condition,
press "F+
b" keys on remote hand unit. The CONVER
ADJUST MENU will appear on the screen. Further, press
b" again, the screen returns to original picture.
"F+
o + o + MENU
S
F + b KEY
Menu Screen
50 Hz mode
Service data display
CONVER ADJUST MENU
1: ADJUST PAL
F + b KEY
ADJUSTING SCREEN
s or t
MENU Selection
2: PAL TO NTSC
60 Hz mode
CONVER ADJUST MENU
1: ADJUST NTSC
Exit from CONVER ADJUST MENU
+ KEY
SCREEN
adjustment
+ KEY
After saving DATA (And return to MENU)
Note: Before proceeding to the adjustment for each screen, always perform the adjustments for vertical size (HIT) and horizon-
tal size (WID) with the main deflection data changed.
1-2-3. Adjustment menu
Order of the adjusting screens is PAL 50Hz → NTSC 60 Hz
The menu order is 1 → 2 (Data conversion).—when the vertical sync is 50 Hz.
Next menu order is 3.—when the vertical sync is 60 Hz.
No. Item Description
1 ADJUST PAL Allows manual adjustment in PAL mode.
Perform the adjustments according to dimensions specified.
2 PAL TO NTSC Automatically saves auxiliary forecasted data of NTSC 60 Hz screen by referring PAL 50 Hz
screen.
The calculated data are saved on NTSC 60 Hz screen, and then the operation completes.
In this case, NTSC 60 Hz screen is created through the calculation process. Perform check in
manual mode, and if there are some problems in color deviation, distortion, etc., correct them.
When ececuted with this menu selected, NTSC 60 Hz screen is modified again, so care will
be necessary.
3 ADJUST NTSC Allows manual adjustment for NTSC 60 Hz screen.
Select this mode when performing adjustment for color matching and correction of distortion
for NTSC 60 Hz are required.
Perform the adjustments according to dimensions specified.
– 20 –
2. KEY FUNCTION OF REMOTE CONTROL UNIT
k
g
e
i
f
a
b
j
h
c
d
m
o
l
n
a h key ................ Red test pattern ON/OFF
b ? key ............... Green test pattern ON/OFF
c 8 key.................. Blue test pattern ON/OFF
d b key ............ Mode picture change over
e 6 key .............. Cursor shift / data change mode
change over
f 0 key ................. Cursor down / adjusting point down
g 2 key ................. Cursor up / adjusting point up
h 7 key ................. Cursor right / adjusting point right
i 5 key ................. Cursor left / adjusting point left
j 3 key ................. Cursor color change
k F key ................. Push this key and 8 key to enter the
convergence menu
l o key ............... Push this key twice and the set con-
sole menu key to enter the service
mode.
m s key ................ Up key on convergence menu.
n t key ................ Down key on convergence menu.
o + key ................. Execution key on convergence menu
or escape key on manual adjustment
picture.
GENERAL ADJUSTMENTS
Fig. 2
– 21 –
3. Picture
a) 50 Hz mode (PAL) . . . . Correcting point: Horizontal 8 x Vertical 8 (Arrow marks denote correcting point)
The first picture
GENERAL ADJUSTMENTS
(Blinking)
The first picture
Crosshatch pattern. Pattern colors are three color display. Cursor is blinking in red. When changed, condition is last memory
state.
Cursor is .......... Data change mode in lighting,
Cursor shifting mode in blinking.
Cursor color Red: Yellow
Green: Green
Blue: Blue
Display color shows the color that data change is possible.
The second picture
Data display
Screen centerCursor (red)
The second picture is indicated with data on top left of the first
picture, therefore, convergence cannot be adjusted by this picture.
Caution:
, Receive suitable signal for adjustment. Centering of
green picture can be done in 50 Hz mode (PAL).
, Centering of 60 Hz mode (NTSC) can be adjusted by
convergence adjustment. Besides, decide the center
by cross pattern of static convergence in menu, and
adjust convergence from center to circumference.
The second picture
When entering from the first picture to the second picture, correcting wave of convergence is muted for one second.
During this period, the changed data is transferred from RAM
Q701 to E2PROM Q711, and saved.
– 22 –
b) 60 Hz mode (NTSC) . . . . Correcting point: Horizontal 8 x Vertical 7 (Arrow marks denote correcting point)
The first picture
Cursor (red)
(Blinking)
Screen center
The first picture
Crosshatch pattern. Pattern colors are three color display. Cursor is blinking in red. When changed, condition is last memory
state.
Cursor is .......... Data change mode in lighting,
Cursor shifting mode in blinking.
Cursor color Red: Yellow
Green: Green
Blue: Blue
Display color shows the color that data change is possible.
The second picture
Data display
GENERAL ADJUSTMENTS
During this period, the changed data is transferred from RAM
Q701 to E2PROM Q711, and saved.
The second picture is indicated with data on top left of the first
picture, therefore, convergence cannot be adjusted by this picture.
Caution:
, Receive suitable signal for adjustment. Decide the center
by cross pattern of static convergence in menu, and adjust
convergence from center to circumference.
The second picture
When entering from the first picture to the second picture, correcting wave of convergence is muted for one second.
– 23 –
4. ADJUSTING PICTURE DIMENSION (GREEN PICTURE)
1.50 Hz mode (PAL)
Screen center
17mm
310.5
274
164.5
GENERAL ADJUSTMENTS
310.5
55
0
55
164.5
274
17mm
8.5mm 8.5mm
428.5 428.5
2. 60Hz mode (NTSC)
306
262
B
A
372.5
74.5223.5
43 inches 4:3 Screen size: Horizontal 874mm, Vertical 655mm
Dimension A: 74.5mm (H span), Dimension B: 36.5mm (V span)
Screen
center
372.5223.574.50
\ mark: center
306
131
0
131
262
8.5mm 8.5mm
21.6mm
327.5
428.5 428.5
327.5223.574.5074.5223.5
43 inches 4:3 Screen size: Horizontal 874mm, Vertical 655mm
Dimension A: 74.5mm, Dimension B: 43.7mm
– 24 –
Screen
center
Loading...