REPLACEMENT OF THE CRT....................................................................................................................................... 9
SERVICE MODE .......................................................................................................................................................... 10
CHASSIS REPLACEMENT PARTS LIST ..................................................................................................................... 26
PC BOARDS BOTTOM VIEW ...................................................................................................................................... 36
TERMINAL VIEW OF TRANSISTORS ......................................................................................................................... 50
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 20)
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
μ
F, 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. Re-
verse 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
0.15 μF
Place this probe on
Good earth ground
such as a water
pipe, conduit, etc.
1500 ohm
10 watt
each exposed
metallic part.
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.
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
Deflection Yoke and Conver Yoke
Lens and Neck Components View
-
4
-
CRT Mounting
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. 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 15.)
6. WHITE BALANCE ADJUSTMENT (page 12.)
Adjustments are complete.
Silicon
(On shaded area)
TSE3843W #23960136
2 ~ 5 mm
15 ~ 25 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 PRECAUTION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF THIS MANUAL.
PICTURE TUBE COMPONENTS ADJUSTMENT
DESCRIPTION OF NECK COMPONENTS
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 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.
-
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).
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 recognize horizontal center.
4. Perform VCEN adjustment. (See page 16.)
5. Adjust G centering magnet so that the cross-bar pattern
center comes to screen center.
6. Perform HEIGHT adjustment .
7. Perform VERT. LINEARITY adjustment.
8. Perform WIDTH adjustment. (See page 16.)
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
R
G
B
SCREEN
COVER
Speaker grille
FOCUS
-
8
-
REPLACEMENT OF THE CRT
Service parts are provided for each R, G and B.
The contents of the parts are as follows.
RG B
51HC85 23078357 23078358 23078359
57HC85 23447326 23447324 23447327
65HC85 23447328 23447324 23447329
65HC15 23447981 23447982 23447983
REPLACEMENT OF HIGH VOLTAGE CABLE
ANODE LEAD
RUBBER BOOT
LEAD HOLDER
Z450 TPA5011
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 TPA5011
(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
LOCKLEAD HOLDER
Fig. b
Cut here rubber boot
and lead together to
detach Lead Holder.
OLD
ANODE LEAD
or
ANODE CAP
-
9
-
SERVICE MODE
1. ENTERING TO SERVICE MODE
1) Press MUTE button twice
on Remote Control.
MUTE
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.
2) Press MUTE button
again to keep pressing.
Adjustment mode
Press
Press
3) While pressing the MUTE button,
press MENU button on TV set.
S
(Service mode display)
Item
Data
Screen adjustment mode ON/OFF:TV (ANT)/VIDEO button (on TV)
Selection of the adjustment items :Channel / (on Remote) and / (on TV)
Change of the data value :Volume / (on TV or Remote)
Adjustment menu mode ON/OFF :MENU button (on TV)
Initialization of the memory (QA02) :RECALL + button on TV
Initialization of the self diagnostic data:RECALL + button on TV
1) Every pressing of button in the service mode changes the adjustment items in the order of table-2.
( button for reverse order)
Refer to table-2 for preset data of adjustment mode.
(See SETTING & ADJUSTING DATA on page 20)
5. ADJUSTING THE DATA
1) Pressing of VOLUME or 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 button on the TV. The initialization of QA02 has been
completed.
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.
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
HDMI
NO * * * * * * * *
ERR CODE :
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”, “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 checkGreen 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 HDMI microprocessor
HDMI error code
-
11
-
ELECTRICAL ADJUSTMENT
ELECTRICAL ADJUSTMENTS
1
+
-
ADJUSTMENT
SPECIFICATION
SIGNAL
10500k+0UV
Same spec is ap-
plied on dark area
and bright area.
White luster signal
(Valuable input level)
on bright
2
BAR SUNK
5TH
Video input
SUB-BRIGHT SIGNAL
(Pedestal to white peak:
714mV ±30mV Value of
low 10 steps:
200mV ±10mV)
5th bar sunk
PROCESS INSTRUCTIONS
ADJUSTING
1. Heat runnning the set at minimum 15 minutes.
2. Go into screen adjustment mode.
ITEM
SCREEN ADJUST
on dark area, and get 264.3cd/m
2
Adjust Focus pack Screen VR of Red, Green, and Blue by looking directly into each
CRT and adjusting each screen VR until CRT is just lit on left side of CRT.
area.
2. Using the data up and down keys, cycle through the adjustments for RED DRIVE,
1. Adjust white luster level to get 4.3cd/m
WHITE BALANCE
ADJUSTMENT
BIAS for dark area.
BLUE DRIVE, RED BIAS and BLUE BIAS.
Adjust RED DRIVE, BLUE DRIVE for bright area, and adjust RED BIAS and BLUE
3. Continue to make adjustments color temperature to spec on each area.
1. Receive Sub-Bright pattern on Video input.
2. Go into BRTC of service mode.
3. Press DATA UP/DOWN to adjust Sub-Bright level to spec.
SUB-BRIGHT
ADJUSTMENT
-
12
-
G Dot cross (NTSC)
B Dot cross (NTSC)
Electrical Focus : R Dot cross (NTSC)
• User Adjustment : SPORTS (CONTRAST MAX, BRIGHTNESS CENTER)
• Adjust after Centering Magnet adjusts.
• Signal : Lens Focus: R Dot cross (NTSC)
ADJUSTMENT METHOD
(Condition)
G Dot cross (NTSC)
B Dot cross (NTSC)
1) Rough Adjust the lens focus and electrical focus of each color(R, G, B).
(Adjustment)
1. Common Items
Adjust Green electrical focus VR on focus pack (Z410) for best center focus.
1) Receive green single color by shielding jig.
2) Receive the Dot Cross pattern.
3) Adjust Green electrical focus.
2. Green Adjustment
Red flare width : 1mm
If the focus blur on screen center and circumference, adjust the electrical focus is best point on all of screen.
Receive the Dot Cross pattern. Adjust Green lens for best center focus.
Green lens focus adjustment target
Dot-cross has red flare (red flare width :1mm)
4) Adjust Green lens focus.
5) Repeat (3)~(4),and adjust best focus point.
ITEM
FOCUS ADJUSTMENT (1/2)
Focus Adjustment
-
13
-
Adjust Red electrical focus VR on focus pack (Z410) for best center focus.
Receive the Dot Cross pattern. Adjust Red lens for best center focus.
1) Receive Red single color by shielding jig.
2) Receive the Dot Cross pattern.
3) Adjust Red electrical focus.
4) Adjust Red lens focus.
ADJUSTMENT METHOD
3. Red Adjustment
ITEM
FOCUS ADJUSTMENT (2/2)
Focus Adjustment
5) Repeat (3)~(4),and adjust best focus point.
1) Receive Blue single color by shielding jig.
2) Receive the Dot Cross pattern.
4. Blue Adjustment
3) Adjust Blue electrical focus.
Adjust Blue electrical focus VR on focus pack (Z410) for best center focus.
(The Brightness is minimum point of Blue.)
-
14
Receive the Dot Cross pattern. Adjust the Blue lens for best center focus.
After easy lens adjustment, turn to right side lens focus screw,
and so dot-cross has flare.
Next turn left focus screw, so flare disappears in Dot-Cross and Dot-Cross become blur.
This point is blue lens focus adjustment target. (flare disappear and become blur)
4) Adjust Blue lens focus.
-
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 memorize the adjusted data.
8.Message of "PLEASE PUSH TOUCH FOCUS" will be dis-played, and press TOUCH FOCUS button which is locatedon the front panel.
9.TOUCH FOCUS CALIBRATION will start.
10.Soon message of "CALIBRATION FINISHED" will be dis-played, and then a normal picture will be displayed.
11.Then push TOUCH FOCUS button again, and confirm thatthe convergence does not change.
EXPLANATION OF KEY-FUNCTION IN THE CONVERGENCE ADJUSTMENT MODE
Load BACK UP DATA:1 button
Up : button
Selet Green color:
Left : button
Blinking of cursor ON/OFF:5 button
Right:button
Adjust mode ON/OFF:7 button
Down:8 button
Vertical stripe ON/OFF9 button
Erase Green line:0 button
Erase Red line:100 button
Erase Blue line:ENT button
Note: The following message will appear while pressing
"1" button.
ENTER:TO LOAD BACKUP DATA
MUTE:TO LOAD INITIAL DATA
EXIT:TO EXIT
BACKUP DATA sets in factory by performing
CALIBRATION. BACKUP DATA updates by performing CALIBRATION again. INITIAL DATA
uses the seed data on this model. Thus, it cannot
updates. INITIAL DATA is not adjusted. Therefore, convergence data operates incorrectly. Normally, BACKUP DATA operates as base data on
this model. If BACKUP DATA is incorrectly operated, INITIAL DATA is operated instead of BACKUP DATA.
2
3
button
4
6
Note: If message of "TOUCH FOCUS ERROR" is displayed,
1)Check the connection between four sensors andConvergence Unit.
2)Check the geometry of internal net pattern. (See Page
14.)
If any problem cannnot be found, hardware might haveproblem.
-
15
-
DEFRECTION and CONVERGENCE
ITEM NAME SETTING
VCEN VERTICAL
Raster
centeing
Adjustment
CONTRAST :MAX
BRIGHTNESS:CNT
COLOR:CNT
TINT:CNT
INPUT
SIGNAL
Retma
Signal
TEST POIN
Between TP-G
to TP-V
MEASURING
INSTRUMENT
Dig
ital Volt
Meter
ADJUSTMENT METHOD ADJUSTMENT SPEC
+
10 mV
Adjust the voltage between TP-G and TP-V.
0
-
DY Tilt
Adjustment
Centering
magnet
Adjustment
WID Horizontal
Adjustment
(FULL)
HIT
(VLIN)
Vertical
Adjustment
(FULL)
Convergence
CONTRAST: MAX
BRIGHTNESS:CNT
COLOR :CNT
TINT:CNT
PIC SIZE:FULL
CONTRAST: MAX
BRIGHTNESS:CNT
COLOR :CNT
TINT:CNT
PIC SIZE:FULL
CONTRAST :MAX
BRIGHTNESS:CNT
COLOR:CNT
TINT:CNT
PIC SIZE: FULL
C-MUTE:ON
CONTRAST :MAX
BRIGHTNESS: CNT
COLOR:CNT
TINT:CNT
PIC SIZE: FULL
C-MUTE: ON
D-Cross
Pattern
Retma
Signal
Retma
Signal
Retma
Signal
Retma
Signal
Picture
Adjustment
Picture
Adjustment
Picture
Adjustment
Picture
Adjustment
Picture
Adjustment
Picture
Adjustment
Picture
Adjustment
Picture
Adjustment
Picture
Adjustment
Picture
Adjustment
After roughly the green centering magnet
alignment, adjust the green yoke so that
the D-cross is as close as possible to the
dummy screen cross. Adjust the Red and
Blue in the same manner as Green.
Adjust the green center to the screen
center with the centering magnet on Retma signal. And adjust the Red and Blue
center to the green center each.
Adjust the Horizontal width by WID on
the green raster only.
After finishing Convergence adjustment,
make sure that the width is the same as
the spec.
Adjust the Vertical height by HIT(VLIN)
on the green raster only.After finishing
Convergence adjustment, make sure that
the height is the same as the spec with
C-MUTE OFF.
Refer to the following (Convergence Net
Geometry)
The dummy screen cross
and D-cross Gap
Color gap at the screen
center is within
+
1 bar
11
-
In case of C-MUTE OFF is
+
-
+
5mm.
-
3mm.
the same spec as well.
In case of Convergence mute.
Upper left...5
Bottom right...5
In case of C-MUTE OFF.
Upper left...4
Bottom right...4
+
0.5 bar
+
-
+
0.5 bar
+
-
0.5 bar
0.5bar.
CONVERGENCE (Adjust the voltage between TP-G and TP-V.)
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.
-
17
-
SCREEN AND MIRROR ALIGNMENTS
ASSEMBLING OF FRONT SCREEN
K503 FRONT PANEL
LENTICULAR
K501
<OUTSIDE>
SMOOTH
K502
FRESNAL
BLACK STRIPES
SMOOTH
<INSIDE>
SPACER
FRONT PANEL
LENTICULAR
FRESNEL
INSIDE
OUT SIDE
LENS
BLACK STRIPES
0 to 1 mm
MOUNTING OF FRONT SCREEN
SMOOTH
FRESNEL
LENTICULAR
FRONT PANEL
BEZEL
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 away
with the specified cleaning cloth.
For other stains than the above, wipe the stains away with
the specified cloth into which a cleaning liquid has been
soaked.
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. Temporarily 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 even 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.
ANODE VOLTAGE MEASURING METHOD
CAUTION: Take extra precaution when measuring this high
voltage. High voltages are also present in
surrounding circuit boards (CRT DRIVE assembly, DEFLECTION assembly, and POWER
SUPPLY assembly).
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 9.)
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.
-
19
-
SETTING & ADJUSTING DATA
SAFETY INSTRUCTIONS
HIGH VOLTAGE AT ZERO BEAM:
MAX HIGH VOLTAGE:
SERVICE MODE
ADJUSTING ITEMS AND DATA IN THE SERVICE MODE:
Table-1
(A)
(B)
51", 57", 65"
32.8 kV
33.9 kV
ItemName of adjustment
RCUT
BCUT
RDRV
BDRV
BRTC
HIT
LIN
VSC
WID
CIRCUIT CHECKS
R CUT OFF
B CUT OFF
R DRIVE
B DRIVE
BRIGHT CENTER
PICTURE HIT
V LINEARITY
V S CORRECTION
PICTURE WIDTH
PresetData
80H
80H
40H
40H
80H
30H
12H
29H
48H
HIGH VOLTAGE DET
ItemName of adjustmentPresetData
COLC
VCP
PARA
CNR
HCP
VFC
VCEN
TVOP
Table-2
Q306 # 8 pin-GND
Table-3
COLOR CENTER
V COMPENSATION
EW PARABOLA
EW M CORRECTION
H COMPENSATION
V f CORRECTION
V CENTERRING
TV OPTION
9.0 V
5DH
06H
0FH
10H
00H
00H
7AH
40H
-
20
-
10 screws
4 screws
K501
K502
K503
3 Front Mask Removal
A202
MECHANICAL DISASSEMBLY
A223
6Back Board Removal
4 screws
K601
A160 (CASTER)
A421
(A424)
22
A001
A102
--
21
-
A201
4 screws
K111
K112
K113
1Speaker Grille Removal2 Control Panel Removal
4 Shield Plate, Lens Removal5 Mirror Removal
CHASSIS AND CABINET REPLACEMENT PARTS LIST
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "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.
E022Z23764270 PC BOARD ASSY, FRONT-CON PU PD1735E2
*
E023Z23764271 PC BOARD ASSY, FRONT-IN PU PD1735E3
*
E024Z23764272 PC BOARD ASSY, REMOTE PU PD1735E4
*
E031Z23764273 PC BOARD ASSY, CRT/SVM/R PU PD1733G1
*
E032Z23764274 PC BOARD ASSY, CRT/SVM/G PU PD1733G2
*
E033Z23764275 PC BOARD ASSY, CRT/SVM/B PU PD1733G3
*
E034Z23764276 PC BOARD ASSY, SVM/DIV PU PD1733G4
*
E045Z23788823 PC BOARD ASSY, IR BLASTER PU PD1289
*
U00123148433 SCAN CONVERTER MODUL, MHSU12
*
U40123764404 PC BOARD ASSY, DEFPOWER PU PD2201A
*
U60123764268 PC BOARD ASSY, IF/AUDIO PU PD1731D2
*
U71123764267 PC BOARD ASSY, CONVER PU PD1731D1
*
US0123764160 PC BOARD ASSY, SPK/CAPA PU PD2065B
*
UV0223148418
*
ACCESSORIES
A701 #1 23067099 CARTON, CARTON
A703 #1 23946479 PACKING, TOP PACKING
A708 #1 23946478 PACKING, BOTTOM PACKING
A709 #1 23946483 PACKING, BOTTOM TRAY
23151232 SPEAKER, SPK1235, 160X160 65HZ 8 OHM
23151232 SPEAKER, SPK1235, 160X160 65HZ 8 OHM
SCAN CONVERTER MODULE, 05HDMI-01A-G MHDM01A
#2 23067100 CARTON, CARTON
#3 23015197 CARTON, CARTON
#4 23064558 CARTON, CARTON
#2 23946481 PACKING, TOP PACKING
#3 23946500 PACKING, TOP
#4 23946500 PACKING, TOP
#2 23946480 PACKING, BOTTOM PACKING
#3 23946499 PACKING, BOTTOM
#4 23946499 PACKING, BOTTOM
#2 23946187 PACKING, BASE TRAY
#3 23946211 PACKING, BASE TRAY
LocationParts No. Description
No.
#4 23946211 PACKING, BASE TRAY
K91223306626 REMOCON HAND UNIT IR, MTVUSA CT-90232
K91323306614 REMOCON HAND UNIT
KB0123000852 REMOCON RECEIVER, PIC-37043TE2
Y101 #1 23566643 OWNERS MANUAL, ENGLISH/FRENCH
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "SAFETY
PRECAUTION" AND "PRODUCT SAFETY NOTICE" ON THE MANUAL FOR THIS MODEL.
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 on the MANUAL for this
model. Do not degrade the safety of the receiver through improper servicing.
NOTE:
1. RESISTORResistance is shown in ohm [K = 1.000, M = 1.000.000]. All resistors are 1/6W and 5% tolerance
2. CAPACITORUnless otherwise noted in schematic, all capacitor values less than 1 are expressed in F, and
carbon resistor, unless otherwise noted as the following marks.
1/2R = Metal or Metal oxide of 1/2 watt1/2S = Carbon compsistion of 1/2 watt
1RF = Fuse resistor of 1 watt10W = Cement of 10 watt
±10% G = ±2% F = ±1%
K =
the values more than 1 in pF.
All capacitors are ceramic 50V, unless otherwise noted as the following marks.
Electolytic capacitor Mylar capacitor
3. The parts indicated with "
4. Voltages read with DIGITAL MULTI-METER from point indicated to chassing ground, using a color bar signal with
all controls at normal, line voltage at 220 volts.
5. Waveforms are taken receiving color bar signal with enough sensitivity.
6. Voltage reading shown are nominal values and may vary
" have special characteristics, and should be replaced with identical parts only.