REPLACEMENT OF THE CRT.................................................................................................................................8
SERVICE MODE ......................................................................................................................................................9
SETTING & ADJUSTING DATA ..............................................................................................................................19
LOCATION OF CONTROLS ................................................................................................................................... 20
CHASSIS REPLACEMENT PARTS LIST ............................................................................................................... 26
PC BOARDS BOTTOM VIEW.................................................................................................................................55
TERMINAL VIEW OF TRANSISTORS ...................................................................................................................68
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 19)
Each time a receiver requires servicing, the high voltage
should be checked f ollowing the HIGH VOLT AGE 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 any one unf amiliar 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 bef ore 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 fr agments
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 e xposed metallic parts
of the cabinet, such as antennas, terminals, screwheads,
metal overlays, control shafts etc. to be sure the set is saf e
to operate without danger of electrical shock. Plug the A C
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 F ail Safe (FS) circuit which
prevents the receiver from producing an excessively high
voltage ev en 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 RADIA TION in this TV receiver
is the picture tube. F or contin ued 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 NO TICE below.
Connect a 1500 ohm 10 watt resistor , paralleled b y 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 0.3 volts rms. This corresponds
to 0.2 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 b y using
replacement components rated for higher voltage, w attage, etc. Replacement parts which have these special saf ety 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
8 o’clock
4 o’clock
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
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.
CAUTION: Align the Anode cable as illustrated on page
4.
ADJUSTING PROCEDURE IN REPLACING CRT
1. R.G.B. FOCUS ADJUSTMENT (page 6.)
2. PICTURE TILT ADJUSTMENT (page 6.)
3. USER CONVERGENCE CENTER CHECK
(See owner's manual.)
4. CENTERING ADJUSTMENT (page 6.)
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 RADIA TION PRECA UTION”, “SAFETY PRECAUTION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF THIS MANUAL.
DESCRIPTION OF NECK COMPONENTSTILT ADJUSTMENT
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
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.
3. Press TV/VIDEO button on the Remote Control to display the white cross-bar.
PREPARATION
Operate the receiver for at least 5 minutes.
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 f asten the 4 scre ws to
secure Lens Assembly.
2. Select the adjustment mode. (See page 9.)
3. Press “7” button to display the built-in cross-hatch.
4. Press “0” and “R TN” buttons to mak e 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 lense focus
to best focusing point of picture center. Then fasten
the screw. (See Fig. a.)
4. Perform VCEN adjustment. (See page 11.)
5. Adjust G centering magnet so that the cross-bar pattern center comes to screen center.
6. Perform HEIGHT adjustment . (See page 12.)
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.
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.
– 6 –
LOCATION OF SCREEN AND FOCUS VR’S
To remove the speaker grille and front panel.
GENERAL ADJUSTMENTS
FOCUS VR's
Front panel
Speaker grille
SCREEN VR's
SPECIFIC INFORMATIONS
– 7 –
REPLACEMENT OF THE CRT
Service parts are provided for each R, G and B.
The contents of the parts are as follows.
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 ne w lead. Do not throw awa y
Lead Holder.
NOTE : THE LEAD HOLDER IS ATTACHED TO
TP A5007 (Z450), BUT IS NO T A TTACHED T O
ANODE LEAD AND ANODE CAP. RUBBER
BOOT IS ATTA CHED TO ANODE LEAD AND
ANODE CAP.
2. Detaching Lead Holder
RUBBER BOOT
OLD
ANODE LEAD
or
ANODE CAP
Fig. a
Z450 TP A5007
– 8 –
LOCKLEAD HOLDER
Fig. b
Cut here rubber boot
and lead together to
detach Lead Holder.
1. ENTERING TO SERVICE MODE
1) Press MUTE button once
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)
2. DISPLAYING THE ADJUSTMENT MENU
1) Press MENU button on TV.
Service mode
S
Press
Press
Adjustment mode
3. KEY FUNCTION IN THE SERVICE MODE
The following key entry during display of adjustment menu provides special functions.
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)
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 19)
5. ADJUSTING THE DATA
1) Pressing of VOLUME s or t button will cahnge 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
GENERAL ADJUSTMENTS
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.
SPECIFIC INFORMATIONS
Part number of microprocessor (QA01)
Operation number of protection circuit (current limiter) . . . . “000” is normal.
BUS line check“OK” ................... Normal
BUS line ACK (acknowledge) check
Sync. signal checkGreen display..... Normal
SELF CHECK
NO. 23 * * * * * *
POWER : 000
BUS LINE : OK
BUS CONT : OK
BLOCK : MAIN SUB
“SCL-GND” or “NG” ........... SCL-GND short circuit
“SDA-GND” or “NG” ........... SDA-GND short circuit
“SCL-SDA” or “NG” ............ SCL-SDA short circuit
“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.)
Red display ........ NG
MAIN ........ Main sync
SUB .......... Sub sync (when turn on the PIP)
– 10 –
ELECTRICAL ADJUSTMENT
ITEMADJUSTMENT PROCEDURE
ƒH
(free-running frequency of Hor.
oscillator)
VERTICAL POSITION (VCEN)
SUB-BRIGHTNESS
(BRTC)
SUB-COLOR
(SCOL)
SUB-TINT
(TNTC)
1. Receive NTSC signal.
2. Short the terminal “TP +9V ” and the terminal “ TP (Free run) ” on the signal board with a jumper
wire.
3. Connect the probe of frequency counter to the lead of R426 and GND.
4. Adjust the frequency to “31.47±0.2 kHz” by turning R4055.
5. Disconnect the shorted wire, then confirm that the picture is synchronized.
1. Receive NTSC signal.
2. Call up the adjustment mode display, then select the item VCEN.
3. Press the VOLUME s or t button to get the voltage 0±10 mV.
4. Measuring terminals are TP-V and TP-G on SIGNAL Board.
1. Constrict the picture height until the vertical retrace line
appears adjusting the HEIGHT control on the MAIN board.
2. Adjust the CONTRAST to the minimum and BRIGHTNESS
to the center.
3. Enter the service mode, then select “BRTC” register.
4. Adjust the data value so the belt of vertical retrace line just
disappear.
5. Adjust the CONTRAST for the desired contrast.
6. Adjust the HEIGHT control.
Vertical retrace line
1. Receive color-bar signal from color-bar generator.
2. Adjust the BRIGHTNESS and CONTRAST to the center (RESET status).
3. Connect oscilloscope to TP501on the MAIN board.
4. Enter the service mode, then select “SCOL”.
5. Temporarily adjust the data value to achieve about 1V
of blue bar.
6. Select “TNTC” register.
Magenta
0-p
0
Blue
2
3 (1.8V
7. Adjust the data value to obtain the blue bar to magenta
bar ratio of 3:2 as shown.
8. Select “SCOL” register .
9. Adjust the data value to achieve 1.8V
of blue bar on
0-p
scope.
10. Check the picture with off-air signal.
0-P
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
)
PICTURE POSITION
(HPOS)
WIDTH
(WID)
1. Receive NTSC signal.
2. Call up the adjustment mode display.
3. Select the item “HPOS”, and adjust the data to “66H”.
4. Adjust the picture position alternately by turning CENTERING MAGNETS for proper picture
position.
5. Check the picture with off-air signal.
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 12 steps.
NOTE: Check the horizontal picture position is correct.
– 11 –
ITEMADJUSTMENT PROCEDURE
HEIGHT
(HIT)
* Only 4:3 mode
HEIGHT
(HIT)
* Only 16:9 mode
1. Receive NTSC signal.
2. Call up the adjustment mode display, then select the item HIT.
3. Press the VOLUME s or t button to get the picture so the top and bottom of
video signal begins to lack.
4. Press the VOLUME s button to advance the data by 12 steps.
Note : Check the vertical picture position is correct.
1. Call up the adjustment mode display, then select the item HIT.
2. Press the VOLUME s or t button so that picture height becomes 75% of the
front mask.
*Note : Adjust this data after 4:3 mode.
VERTICAL LINEARITY
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
(VLIN)
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 “40”.
3. Press TV (ANT)/VIDEO button on TV.
4. Gradually rotate R, G and B SCREEN volume of FOCUS PAC (page 7) 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 GDRV 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
Adjust convergence from center to circumf erence in order.
1. Select the adjustment mode following the steps on page 9.
KEY FUNCTION IN THE
CONVERGENCE ADJUSTMENT:
RCUT
40H
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
Erase Green line:0 button
Erase Red line:100 button
Erase Blue line:CHRTN (ENT) button
Note:
Adjusting procedure in replacing convergence board.
1. User convergence center check. Make
sure the best convergence setting is
about the center of adjustable range.
2. CENTERING ADJUSTMENT
3. PICTURE POSITION ADJUSTMENT
4. HIT, WID ADJUSTMENT
5. CONVERGENCE ADJUSTMENT
GENERAL ADJUSTMENTS
2. Press “7” button to display the built-in cross-hatch pattern.
Cursor
SPECIFIC INFORMATIONS
The pattern includes three colors (R, G, B).
The cursor should be blinking in Red.
This means that the Red color is adjustable.
Adjustment around cursor can be done.
3. Press “3” button to select Green color to be adjusted.
4. Press “5” button to stop the blinking of cursor.
5. Press “2 (up)”, “8 (down)”, “4 (left)” or “6 (right)” to obtain the correct
cross-hatch pattern as above.
If necessary, the specified color line can be erased from the screen.
100 button .................. to erase Red line
0 button .................. to erase Green line
RTN (ENT) button .................. to erase Blue line
6. Press “5” button to make the cursor blinking.
7. Press “2”, “8”, “4”, “6” buttons to move the cursor to other point to be
adjusted.
8. Repeat steps 4 to 7.
9. Repeat steps 3 to 8 to adjust Red and Blue colors.
Converge the selected color line into the Green line.
10. Press “7” button to enter the adjusted states.
At this time, picture changes for about 1 second.
11. Press “7” button again to return to the normal picture.
– 13 –
ADJUSTING DIMENSION OF EACH PICTURE SCREEN
43 inches:
(1) NTSC
SCREEN SIZE (874 mm : 655 mm)
Cursor
GENERAL ADJUSTMENTS
433.2 361.0216.672.272.2216.6361.0 433.20
305.9
262.2
131.1
0
(Center)
131.1
262.2
305.9
43.7 (V. SPAN)
72.2 (H. SPAN)
SPECIFIC INFORMATIONS
(2) HD (4 : 3)
433.2 361.0216.672.272.2216.6361.0 433.20
286.3
245.4
122.7
0
(Center)
122.7
245.4
286.3
40.9 (V. SPAN)
72.2 (H. SPAN)
– 14 –
(3) HD (16 : 9)
433.2 361.0216.672.272.2216.6361.0 433.20
245.4
214.7
184.1
92.0
0
(Center)
92.0
184.1
214.7
245.4
30.7 (V. SPAN)
72.2 (H. SPAN)
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
– 15 –
NOTES
In many cases, color misconv ergence 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. Perf orm 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)
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
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 each screen picture for color matching. Do not move green one at this time.
7. After convergence adjustment of each 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.
REPLACING CONVERGENCE UNIT
When replacing convergence unit, all picture screens require readjustment basically, but the following method allo ws process be
reduced considerably.
1. Replace the memory (Q713) on defective unit with memory on new unit. Mounting the unit on the SET after the above
working realizes picture screen before replacement immediately.
2. Mount unit which has combination of old and new memories, on SET and turn it on. Screen shows whole picture looks like
straightly shifted towards vertical or horizontal direction.
3. Adjust again centers of green, red and blue with centering magnets.
4. Check each picture screen for slight disparity of color and picture size. If necessary, add some adjustments of main deflection and color matching of convergence.
– 16 –
SCREEN AND MIRROR ALIGNMENTS
* Please refer to MECHANICAL DISASSEMBLY page 25.
CLEANING OF LENS AND MIRROR
CAUTION : Do not hold the optical system parts (lens and
mirror) with bare hand to avoid finger-prints on
the surface of those parts.
HOW TO CLEAN LENS AND MIRROR
1. Be sure to remove sand dust with an air brush, etc.
2. When it is stained slightly , breathe upon it and wipe a w a y
with the specified cleaning cloth.
For other stains than the abov e, wipe the stains awa y with
the specified cloth into which a cleaning liquid has been
soaked.
voltage. High voltages are also present in
surrounding circuit boards (CRT DRIVE assembly, DEFLECTION assembly, and POWER
SUPPLY assembly).
Descriptions
40", 43"
TFB3088AD
4300pF, ±3%
0.027µF, ±5%
0.015µF, ±5%
0.011µF, ±5%
6200PF, ±3%
8200PF, ±5%
1000PF, ±3%
50", 55", 61"
←
5100pF, ±3%
0.022µF, ±3%
0.022µF, ±5%
0.012µF, ±5%
5600pF, ±3%
←
←
FS CIRCUIT CHECK
The Fail Safe (FS) circuit check is indispensable for the final
check in servicing. Checking should be done following the
steps below.
1. Turn the receiver on.
2. T emporarily short TP- (R) and TP- (X) on the DEF/POWER
Board with a jumper wire.
Raster and sound will disappear.
3. The receiver must remain in this state e ven after removing
the jumper wire. This is the evidence that the FS circuit is
functioning properly.
4. To obtain a picture again, temporarily turn the receiver off
and allow the FS circuit more than 5 seconds to reset. Then
turn the receiver on to produce a normal picture.
Troubleshooting Guide for Fail Safe Circuit
Check that the set returns to normal operation when
pin 12 of Z801 is grounded with jumper wire.
YESNO
Check the voltage across
Capacitor C419 is
approximately (
Refer to table –4 for
fall safe voltage (
YES
Defective Fail Safe Circuit
C)
volts.
C)
(See SETTING & ADJUSTING
DATA on page19)
.
NO
Faulty power
circuit or horizontal circuit.
1. Disconnect the FBT anode cable as outlined below . Measure high voltage at the point where the cable enters the
FBT.
2. Holding the rubber cover firmly, turn it counterclockwise
and check that the lock has been disengaged. (See Fig. b
on page 8.)
3. Determine the extent of the rubber cover before disconnecting the cable.
4. Pull straight up the anode cable to disconnect.
5. When reconnecting the cable, proceed in the reverse order.
After reconnecting, tug on the cable to check that it is secure.
– 18 –
CHAPTER 2 SPECIFIC INFORMATIONS
SETTING & ADJUSTING DATA
SAFETY INSTRUCTIONS
HIGH VOLTAGE AT ZERO BEAM:(A)29.5 kV
MAX HIGH VOLTAGE:
Table-1
SERVICE MODE
43"
(B)31.0 kV
ADJUSTING ITEMS AND DATA IN THE SERVICE MODE:
ItemName of adjustment
RCUT
GCUT
BCUT
RDRV
BDRV
BRTC
TNTC
SCOL
SCNT
HPOS
VPOS
HIT
LIN
VSC
WID
VPS
HPHA
BLKS
R CUTOFF
G CUTOFF
B CUTOFF
R DRIVE
B DRIVE
SUB-BRIGHT
SUB-TINT
SUB COLOR
SUB-CONTRAST
HORIZ. POSITION
VERT. POSITION
HEIGHT
V-LINEARITY
V-S CORRECTION
PICTURE WIDTH
V -SHIFT
HORIZ. PHASE (Q510)
VERT. BLANKING START
VERT. BLANKING END
PIP Y OFFSET
PIP I OFFSET
PIP Q OFFSET
V-COMPENSATE
E-W PARABOLA (DPC)
E-W CORNER
H-COMPENSATE
V-F CORRECT
PIP TINT
PIP CONT
PIP COLOR
RGB BRIGHT
V POSITION
TV OPTION
TV SET OPTION
TV SET OPTION
The channel memory is the list of TV channel numbers the TV tunes in when you press the CHANNEL s or t button.
First, use the TV/CABLE and CH PROGRAM functions to preset all active channels in your area automatically.
If necessary, arrange the preset channels with the ADD/ERASE functions so that you can tune into only desired channels.
Note: If you utilize both ANT-1 and ANT-2 terminals for some model, perform programming channels for each input source.
TV/CABLE function
1 Press MENU, then press S or T until the SET UP menu
GENERAL ADJUSTMENTS
appears.
2 Press t (or s) until “TV/CABLE” is highlighted.
3 Press : or ; to highlight either “TV” or “CABLE”, whichever
you use.
CH PROGRAM function
1 Select “CH PROGRAM” following steps 1 and 2 above.
2 Press : or ; to start channel programming.
SPECIFIC INFORMATIONS
The TV will automatically cycle through all the TV or
CABLE channels selected by the TV/CABLE function, and
store active channels in the channel memory.
3 When channel programming is complete, you will see the
message to the right appears.
4 Press CHANNEL s or t to make sure the channel
programming has been done properly.
ADD/ERASE function
After performing the CH PROGRAM function, you can add or
erase specific channels.
1 Select the channel you want to erase using the CHANNEL
s or t button, or select the channel you want to add using
the Channel Number buttons.
2 Press MENU, then press S or T until the SET UP menu
appears.
3 Press t (or s) until “ADD/ERASE” is highlighted.
4 Press S or T :
To erase the channel press the button until “ERASE” is
highlighted.
To add the channel press the button until “ADD” is
highlighted.
5 Repeat steps 1 to 4 for other channels.
You have now completed the channel programming.
Note: The CHANNEL t/s buttons on the TV function as the
t/s buttons while a menu is on the screen.
* Please refer to owner's manual in detail.
– 22 –
CIRCUIT BLOCK DIAGRAM
– 23 –
– 24 –
K501
MECHANICAL DISASSEMBLY
K502
20 SCREWS
K601
K503
SCREWS
4 SCREWS
LABELS
SCREWS
9 SCREWS
A420
A424 (A423)
11 SCREWS
SPECIFIC INFORMATIONS
A201
A103
4 SCREWS
A251 (A258)
A254
(A257)
A101
K111
K112
K113
A202
A102
6 SCREWS
– 25 –
CHASSIS REPLACEMENT PARTS LIST
WARNING: BEFORE SER VICING THIS CHASSIS, READ THE “X-RAY RADIA TION PRECA UTION”, “SAFETY PRE-
CAUTION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF THIS MANUAL.
CAUTION: The international hazard symbols “” in the schematic diagram and the parts list designate components
which have special characteristics important for safety and should be replaced only with types identical to those in the
original circuit or specified in the parts list. The mounting position of replacements is to be identical with originals.
Before replacing any of these components, read carefully the PRODUCT SAFETY NOTICE. Do not degrade the
safety of the receiver through improper servicing.
NOTICE:
•
The part number must be used when ordering parts, in order to assist in processing, be sure to include the Model
number and Description.
•
The PC board assembly with * mark is no longer available after the end of the production.