(1) The design of this product contains special hardware,
many circuits and components specially for safety
purposes. For continued protection, no changes should be
made to the original design unless authorized in writing by
the manufacturer. Replacement parts must be identical to
those used in the original circuits. Service should be
performed by qualified personnel only.
(2) Alterations of the design or circuitry of the products should
not be made. Any design alterations or additions will void
the manufacturer's warranty and will further relieve the
manufacturer of responsibility for personal injury or
property damage resulting therefrom.
(3) Many electrical and mechanical parts in the products have
special safety-related characteristics. These
characteristics are often not evident from visual inspection
nor can the protection afforded by them necessarily be
obtained by using replacement components rated for
higher voltage, wattage, etc. Replacement parts which
have these special safety characteristics are identified in
the parts list of Service manual. Electrical components
having such features are identified by shading on the
schematics and by ( ) on the parts list in Service
manual. The use of a substitute replacement which does
not have the same safety characteristics as the
recommended replacement part shown in the parts list of
Service manual may cause shock, fire, or other hazards.
(4) Don't short between the LIVE side ground and
ISOLATED (NEUTRAL) side ground or EARTH side
ground when repairing.
Some model's power circuit is partly different in the GND.
The difference of the GND is shown by the LIVE : ( ) side
GND, the ISOLATED (NEUTRAL) : ( ) side GND and
EARTH : ( ) side GND.
Don't short between the LIVE side GND and ISOLATED
(NEUTRAL) side GND or EARTH side GND and never
measure the LIVE side GND and ISOLATED (NEUTRAL)
side GND or EARTH side GND at the same time with a
measuring apparatus (oscilloscope etc.). If above note will
not be kept, a fuse or any parts will be broken.
(5) When service is required, observe the original lead dress.
Extra precaution should be given to assure correct lead
dress in the high voltage circuit area. Where a short circuit
has occurred, those components that indicate evidence of
overheating should be replaced. Always use the
manufacturer's replacement components.
(6) Isolation Check (Safety for Electrical Shock Hazard)
After re-assembling the product, always perform an
isolation check on the exposed metal parts of the cabinet
(antenna terminals, video/audio input and output terminals,
Control knobs, metal cabinet, screw heads, earphone jack,
control shafts, etc.) to be sure the product is safe to operate
without danger of electrical shock.
a) Dielectric Strength Test
The isolation between the AC primary circuit and all metal
parts exposed to the user, particularly any exposed metal
part having a return path to the chassis should withstand a
voltage of 3000V AC (r.m.s.) for a period of one second. (.
. . . Withstand a voltage of 1100V AC (r.m.s.) to an
appliance rated up to 120V, and 3000V AC (r.m.s.) to an
appliance rated 200V or more, for a period of one second.)
This method of test requires a test equipment not generally
found in the service trade.
b) Leakage Current Check
Plug the AC line cord directly into the AC outlet (do not use
a line isolation transformer during this check.). Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal part of the cabinet, particularly
any exposed metal part having a return path to the chassis,
to a known good earth ground (water pipe, etc.). Any
leakage current must not exceed 0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.2mA AC
(r.m.s.).
Alternate Check Method
Plug the AC line cord directly into the AC outlet (do not
use a line isolation transformer during this check.). Use
an AC voltmeter having 1000Ω per volt or more
sensitivity in the following manner. Connect a 1500Ω
10W resistor paralleled by a 0.15µF AC-type capacitor
between an exposed metal part and a known good earth
ground (water pipe, etc.). Measure the AC voltage
across the resistor with the AC voltmeter. Move the
resistor connection to each exposed metal part,
particularly any exposed metal part having a return path
to the chassis, and measure the AC voltage across the
resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Any voltage measured must
not exceed 0.75V AC (r.m.s.). This corresponds to
0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.3V AC
(r.m.s.). This corresponds to 0.2mA AC (r.m.s.).
AC VOLTMETER
(HAVING 1000 /V,
OR MORE SENSITIVITY)
0.15 F AC-TYPE
GOOD EARTH GROUND
1500 10W
PLACE THIS PROBE
ON EACH EXPOSED
ME TAL PAR T
(No.YA401)1-3
1.2INSTALLATION
1.2.1 HEAT DISSIPATION
If the heat dissipation vent behind this unit is blocked, cooling
efficiency may deteriorate and temperature inside the unit will
rise. The temperature sensor that protects the unit will be
activated when internal temperature exceeds the pre-determined
level and power will be turned off automatically.Therefore,
please make sure pay attention not to block the heat dissipation
vent as well as the ventilation outlet behind the unit and ensure
that there is room for ventilation around it.
Ventilation hole
1.2.3 INSTALLATION REQUIREMENTS
To ensure safety in an emergency such as an earthquake, and
to prevent accidents, ensure that measures are taken to prevent
the TV dropping or falling over.
Tie commercially available tough cord(s) to the hooks in the back
of the TV, and fix the TV to solid walls or columns.
< FRONT VIEW >
WALL
*Diagram differs from actual appearance.
1.2.2 INSTALLATION REQUIREMENTS
Ensure that the minimal distance is maintained, as specified
below, between the unit with and the surrounding walls, as well
as the floor etc.Install the unit on stable flooring or stands.Take
precautionary measures to prevent the unit from tipping in order
to protect against accidents and earthquakes.
HOOK
HOOK
*Diagram differs from actual appearance.
< SIDE VIEW >
It fixes in a band.
TV STAND
*Diagram differs from actual appearance.
200mm
*Diagram differs from actual appearance.
50mm150mm150mm50mm
1-4 (No.YA401)
1.2.4 NOTES ON HANDLING
(1) WHEN TAKING UNIT OUT OF A PACKING CASE
When taking the unit out of a packing case, do not grasp
the upper part of the unit. If you take the unit out while
grasping the upper part, the LCD PANEL may be damaged
because of a pressure. Instead of grasping the upper part,
put your hands on the lower backside or sides of the unit.
(2) AS FOR PRESSING OR TOUCHING A SPEAKER
Be careful not to press the opening of the speaker in the
lower part of the unit and around them since the decorative
sheet on the surface of the openings may be deformed.
1.3HANDLING LCD PANEL
1.3.1 PRECAUTIONS FOR TRANSPORTATION
When transporting the unit, pressure exerted on the internal LCD
panel due to improper handling (such as tossing and dropping)
may cause damages even when the unit is carefully packed. To
prevent accidents from occurring during transportation, pay
careful attention before delivery, such as through explaining the
handling instructions to transporters.
Ensure that the following requirements are met during
transportation, as the LCD panel of this unit is made of glass and
therefore fragile:
(1) USE A SPECIAL PACKING CASE FOR THE LCD PANEL
When transporting the LCD panel of the unit, use a special
packing case (packing materials). A special packing case
is used when a LCD panel is supplied as a service spare
part.
(2) ATTACH PROTECTION SHEET TO THE FRONT
Since the front (display part) of the panel is vulnerable,
attach the protection sheet to the front of the LCD panel
before transportation. Protection sheet is used when a LCD
panel is supplied as a service spare part.
(3) AVOID VIBRATIONS AND IMPACTS
The unit may be broken if it is toppled sideways even when
properly packed. Continuous vibration may shift the gap of
the panel, and the unit may not be able to display images
properly. Ensure that the unit is carried by at least 2
persons and pay careful attention not to exert any vibration
or impact on it.
(4) DO NOT PLACE EQUIPMENT HORIZONTALLY
Ensure that it is placed upright and not horizontally during
transportation and storage as the LCD panel is very
vulnerable to lateral impacts and may break. During
transportation, ensure that the unit is loaded along the
traveling direction of the vehicle, and avoid stacking them
on one another. For storage, ensure that they are stacked
in 2 layers or less even when placed upright.
1.3.2OPTICAL FILTER (ON THE FRONT OF THE LCD PANEL)
(1) Avoid placing the unit under direct sunlight over a
prolonged period of time. This may cause the optical filter
to deteriorate in quality and COLOUR.
(2) Clean the filter surface by wiping it softly and lightly with a
soft and lightly fuzz cloth (such as outing flannel).
(3) Do not use solvents such as benzene or thinner to wipe the
filter surface. This may cause the filter to deteriorate in
quality or the coating on the surface to come off. When
cleaning the filter, usually use the neutral detergent diluted
with water. When cleaning the dirty filter, use water-diluted
ethanol.
(4) Since the filter surface is fragile, do not scratch or hit it with
hard materials. Be careful enough not to touch the front
surface, especially when taking the unit out of the packing
case or during transportation.
1.3.3 PRECAUTIONS FOR REPLACEMENT OF EXTERIOR
PARTS
Take note of the following when replacing exterior parts (REAR
COVER, FRONT PANEL, etc.):
(1) Do not exert pressure on the front of the LCD panel (filter
surface). It may cause irregular COLOUR.
(2) Pay careful attention not to scratch or stain the front of the
LCD panel (filter surface) with hands.
(3) When replacing exterior parts, the front (LCD panel) should
be placed facing downward. Place a mat, etc. underneath
to avoid causing scratches to the front (filter surface).
(No.YA401)1-5
2.1SYSTEM SETTEING
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
LOB 0 FAN 0
AUD 0
ANA 9 DIG 9
0000 00
00
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
Be sure to carry out the following operation at the end of
the procedure.
(1) Press the [DISPLAY] key and [MUTING] key
simultaneously, then enter the SERVICE MODE.
(2) When the Main Menu is displayed, press [2] key to enter
the self check mode.
(3) Turn off the power by pressing the [POWER] key on the
remote control unit.
SERVICE MENU SCREEN
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
SELF CHECK MODE SCREEN
LOB 0 FAN 0
AUD 0
ANA 9 DIG 9
0000 00
00
2.2FEATURES
D.I.S.T. (Digital Image Scaling Technology)
This system uses line interpolation to double the number of
scanning lines and achieve high resolution, flicker-free picture.
Colour Management
This function ensures dull colours are compensated to
produce natural hues.
Picture Management
This function makes it easier to see the dark areas when a
picture has many dark areas, and makes it easier to see the
bright areas when a picture has many bright areas.
Smart Picture
This function detects the APL (Average Picture Level) and
adjusts the contrast suitable for what you are watching.
DIGITAL VNR
This function cuts down the amount of noise in the original
picture.
MPEG Noise Reduction
This function effects the block noise removal and mosquito NR
simultaneously.
MaxxBass
This function emphasizes the bass sound.
2.3MAIN DIFFERENCE LIST
ItemLT-Z32FX6LT-Z32FX6/ALT-Z32FX6/SLT-Z32FX6/B
POWER CORDEU Type (2 Pins)AU Type (2 Pins)UK Type (3 Pins)Flat type (2 Pins)
ANALOG PWBSFL-1231A-H2←←SFL-1231A-BK
D-AMP PWBSFL-6231A-H2←←SFL-6231A-BK
SW PWBSFL-7202A-H2←←SFL-7202A-BK
LED PWBSFL-8706A-H2←←SFL-8706A-BK
POWER PWBSFL-9044A-H2←←SFL-9044A-BK
DC-DC PWBSFL-9145A-H2←←SFL-9145A-BK
DIGITAL PWBSFL0D355A-H2SFL0D356A-H2←SFL0D355A-BK
1-6 (No.YA401)
2.4TECHNICAL INFORMATION
2.4.1 LCD PANEL
This unit uses the flat type panel LCD (Liquid Crystal Display) panel that occupies as little space as possible, instead of the
conventional CRT (Cathode Ray Tube), as a display unit.
Since the unit has the two polarizing filter that are at right angles to each other, the unit adopts "normally black" mode, where light
does not pass through the polarizing filter and the screen is black when no voltage is applied to the liquid crystals.
2.4.1.1SPECIFICATIONS
The following table shows the specifications of this unit.
ItemSpecifications
Maximum dimensions ( W × H × D )
Weight7.0 kg
Effective screen sizeDiagonal: 800 mm (H: 697 mm × V: 392 mm)
Aspect ratio16 : 9
Drive device / systema-Si-TFT active matrix system
ResolutionHorizontally 1366 × Vertically 768 × RGB < W-XGA > 3147264 dots in total
Pixel pitch (pixel size)Horizontally: 0.51075 mm, Vertically: 0.51075mm
Displayed colour16777216 colours 256 colours for R G and B
Panel interface systemLVDS (Low Voltage Differential Signaling)
760 mm × 450 mm × 50 mm
24 V
2.4.1.2PIXEL FAULT
There are three pixel faults - bright fault , dark fault and flicker fault - that are respectively defined as follows.
BRIGHT FAULT
In this pixel fault, a cell that should not light originally is lighting on and off.
For checking this pixel fault, input ALL BLACK SCREEN and find out the cell that is lighting on and off.
DARK FAULT
In this pixel fault, a cell that should light originally is not lighting or lighting with the brightness twice as brighter as originally lighting.
For checking this pixel fault, input 100% of each R/G/B colour and find out the cell that is not lighting.
FLICKER FAULT
In the pixel fault, a cell that should light originally or not light originally is flashing on and off.
For checking this pixel fault, input ALL BLACK SCREEN signal or 100% of each RGB colour and find out the cell that is flashing on
and off.
(No.YA401)1-7
2.4.2 MAIN CPU PIN FUNCTION [IC7301
PinPin nameI/OFunction PinPin nameI/OFunction
1TCKO Test purpose65D2I/O Program ROM data for main CPU
2TMSITest purpose66D12I/O Program ROM data for main CPU
3TDIITest purpose67D10I/O Program ROM data for main CPU
4TDOO Test purpose68VSS33- GND
5P2.8O TV, Subtitle/OTHER69VDD33I 3.3V
6P2.9O Blue for OSD70D4I/O Program ROM data for main CPU
7P2.10O Blue for OSD71D3I/O Program ROM data for main CPU
8P2.11O Blue for OSD72D11I/O Program ROM data for main CPU
9P2.12O Blue for OSD73RSTINI Reset
10P2.13O Blue for OSD74POWERO Sleep state release for chassis CPU [Relese : L]
11P2.14I Not used75P3.1O DM_RESET(IDTV)
12P2.15O Request for chassis CPU communication76REMOCONI Remote control
13VSS33- GND77P3.3I Clock for OSD
14VDD33I 3.3V78P3.4O Red for OSD
15P4.5O Not used79P3.5O Red for OSD
16A20O Program ROM address for main CPU80P3.6O Red for OSD
17A19O Program ROM address for main CPU81P3.7O Red for OSD
18A18O Program ROM address for main CPU82MTSTI/O Data transmission for chassis CPU communication
19A17O Program ROM address for main CPU83MTSRI/O Data receive for chassis CPU communication
20VSS25- GND84VSS33- GND
21VDD25I2.5V85VDD33I3.3V
22A16O Program ROM address for main CPU86VSS25- GND
23A8O Program ROM address for main CPU87VDD25I 2.5V
24A7O Program ROM address for main CPU88TXD0I/O Communication for adjustment
25A9O Program ROM address for main CPU89RXD0I/O Communication for adjustment
26A6O Program ROM address for main CPU90P3.12O Red for OSD
27A5O Program ROM address for main CPU91CLKO Clock for chassis CPU communication
28A10O Program ROM address for main CPU92P3.15O Green for OSD
29A11O Program ROM address for main CPU93P5.14O Green for OSD
30A12O Program ROM address for main CPU94P5.15O Green for OSD
31VSS33- GND95TRIG_INO Green for OSD
32VDD33I3.3V96TRIG_OUTO Green for OSD
33A4O Program ROM address for main CPU97P6.2O Green for OSD
34A3O Program ROM address for main CPU98P6.3I/O I
35A2O Program ROM address for main CPU99P6.4I/O I
36A1O Program ROM address for main CPU100P6.5O Teletext signal select [Analog RGB : H / Digital RGB : L]
37A0O Program ROM address for main CPU101IRQO IRQ(IDTV)
38A13O Program ROM address for main CPU102VSYNCI/O Vertical sync
39ARAS/A14O Program ROM address for main CPU103HSYNCI/O Horizontal sync
40CAS/A15O Program ROM address for main CPU104
41VSS33- GND105BLANKO Ys for OSD / Teletext
42VDD33I3.3V106VDD33I3.3V
43MEMCLKO Clock for memory107VSS33- GND
44CSSDRAMO Chip select for memory108XTAL1I 6MHz for system clock
45CLKENO Clock enable for memory109XTAL2O 6MHz for system clock
46CSROMO Chip select for memory110VSSA- GND
47RDO Read for memory111VDDAI 2.5V
48UDQMO Control buffer of memory112RO R for OSD / Teletext
49LDQMO Control buffer of memory113GO G for OSD / Teletext
50WRO Write for memory114BO B for OSD / Teletext
51D15I/O Program ROM data for main CPU115VSSA- GND
52VSS33- GND116VDDAI 2.5V
53VDD33I3.3V117CVBS2I Video for Teletext
54D7I/O Program ROM data for main CPU118VSSA- GND
55D0I/O Program ROM data for main CPU119VDDAI2.5V
56D14I/O Program ROM data for main CPU120CVBS1BIVideo for Teletext
57D8I/O Program ROM data for main CPU121CVBS1AI Video for Teletext
58D6I/O Program ROM data for main CPU122VSSA- GND
59D1I/O Program ROM data for main CPU123VDDAI2.5V
60VSS33- GND124KEY1I Key scan data 1 [ON : H]
61VDD33I3.3V125KEY2I Key scan data 2 [ON : H]
62D13I/O Program ROM data for main CPU126MECA_SWIMain power ON / OFF control [ON : L]
63D9I/O Program ROM data for main CPU127
64D5I/O Program ROM data for main CPU128TMODEI Test purpose
: DIGITAL PWB]
COR/RSTOUT
(KEYP2)P5.3
2
C bus clock (for main memory)
2
C bus Data (for main memory)
O Not used
I Not used
1-8 (No.YA401)
SECTION 3
DISASSEMBLY
3.1DISASSEMBLY PROCEDURE
CAUTION AT DISASSEMBLY:
• Be sure to perform the SYSTEM SETTEING, at the end of the procedure.
• Make sure that the power cord is disconnected from the outlet.
• Pay special attention not to break or damage the parts.
• When removing each board, remove the connectors as required. Taking notes of the connecting points (connector numbers)
makes service procedure manageable.
• Make sure that there is no bent or stain on the connectors before inserting, and firmly insert the connectors.
3.1.1 REMOVING THE STAND (Fig.1)
(1) Remove the 2 screws [A].
(2) Remove the STAND COVER.
(3) Remove the 4 screws [B].
(4) Remove the STAND.
3.1.2 REMOVING THE REAR COVER (Fig.1)
• Remove the STAND.
(1) Remove the JACK COVER (L/R).
(2) Remove the 7 screws [C], the 5 screws [D], and the 1
screw [E].
(3) Remove the REAR COVER.
3.1.3 REMOVING THE POWER PWB (Fig.1)
• Remove the STAND.
• Remove the REAR COVER.
(1) Remove the 1 screw [F].
(2) Remove the POWER CORD HOLDER.
(3) Remove the POWER CORD.
(4) Remove the 4 screws [G].
(5) Remove the POWER PWB.
3.1.4 REMOVING THE D-AMP PWB (Fig.1)
• Remove the STAND.
• Remove the REAR COVER.
(1) Remove the 2 screw [H].
(2) Remove the D-AMP PWB.
3.1.6 REMOVING THE DC-DC PWB (Fig.1)
• Remove the STAND.
• Remove the REAR COVER.
(1) Remove the 4 screws [Q].
(2) Remove the BACK BRACKET.
(3) Remove the 2 screws [R].
(4) Remove the DC-DC PWB.
3.1.7 REMOVING THE DIGITAL PWB (Fig.1)
• Remove the STAND.
• Remove the REAR COVER.
• Remove the BACK BRACKET.
• Remove the 7 hooks of the SHIELD COVER.
(1) Remove the SHIELD COVER by sliding it in the direction of
the arrow.
(2) Remove the 2 screws [S] and 2 screws [T].
(3) Remove the SHIELD TERMINAL.
(4) Remove the 9 screws [U].
(5) Remove the DIGITAL PWB.
CAUTION :
Make sure to perform the "SYSTEM SETTEING", when
DIGITAL PWB is replaced.
3.1.5 REMOVING THE ANALOG PWB (Fig.1)
• Remove the STAND.
• Remove the REAR COVER.
• Remove the D-AMP PWB.
(1) Remove the 3 screws [J] and 2 screws [K].
(2) Remove the TERMINAL BASE.
(3) Remove the 1 screw [L].
(4) Remove the TUNER BASE.
(5) Remove the 2 screws [M].
(6) Remove the D-AMP BRACKET.
(7) Remove the 2 screws [N] and 2 screws [P].
(8) Remove the ANALOG PWB.
(No.YA401)1-9
㧯
JACK COVER
D
E
STAND COVER
A
A
B
REAR COVER
STAND
SHIELD COVER
Hook
Hook
Hook
Hook
Hook
Hook
Hook
BACK BRACKET
Q
M
D-AMP PWB
BRACKET
H
U
DIGITAL PWB
U
S
D-AMP PWB
SHIELD COVER
SHIELD TERMINAL
SHIELD TERMINAL
T
ANALOG PWB
N
TUNER BASE
K
TERMINAL BASE
SHIELD BASE
L
R
R
POWER PWB
DC-DC PWB
POWER CORD HOLDER
POWER CORD
F
G
J
1-10 (No.YA401)
P
FRONT
Fig.1
3.1.8 REMOVING THE SW PWB (Fig.2)
• Remove the STAND.
• Remove the REAR COVER.
(1) Remove the 2 screws [A].
(2) Remove the CONTROL ASS’Y with SW PWB.
(3) Remove the 2 screws [B].
(4) Remove the SW PWB from the CONTROL ASS’Y.
3.1.11 REMOVING THE ILLUMINATE LENS (Fig.2)
• Remove the STAND.
• Remove the REAR COVER.
• Remove the LED PWB.
• Remove the STAND BRACKET.
(1) Remove the 2 screws [F].
(2) Remove the ILLUMINATE LENS.
3.1.9 REMOVING THE SPEAKER (Fig.2)
• Remove the STAND.
• Remove the REAR COVER.
(1) Remove the 6 screws [C].
(2) Remove the SPEAKER (L /R).
NOTE:
• Since the speaker is attached in a certain direction, attach
the speaker in the same correct direction as it has been
attached.
• When the speaker is decomposed, the performance cannot
be kept.
3.1.10 REMOVING THE LED PWB (Fig.2)
• Remove the STAND.
• Remove the REAR COVER.
(1) Remove the 2 screws [D].
(2) Remove the STAND BRACKET.
(3) Remove the 2 hooks [E].
(4) Remove the LED PWB.
MAIN BASE
G
G
3.1.12 REMOVING THE LCD PANEL UNIT (Fig.2)
• Remove the STAND.
• Remove the REAR COVER.
• Remove the BACK BRACKET.
• Remove the STAND BRACKET.
• Remove the POWER CORD HOLDER.
(1) Remove the 2 screws [G].
(2) Remove the MAIN BASE.
(3) Remove the 2 screws [H] and 2 screw [J].
(4) Remove the LCD PANEL UNIT with TOP/BOTTOM
FRAME.
(5) Remove the 2 screws [K].
(6) Remove the TOP FARAME from the LCD PANEL UNIT.
(7) Remove the 2 screws [L].
(8) Remove the BOTTOM FARAME from the LCD PANEL
UNIT.
D
STAND
BRACKET
C
SPEAKER
SW PWB
A
CONTROL ASS'Y
ILLUMINATE LENS
F
LCD PANEL UNIT
SPEAKER
H
K
TOP FRAME
G
H
K
E
J
C
B
A
FRONT PANEL
FRONT
LED PWB
J
BOTTOM FRAME
L
L
Fig.2
(No.YA401)1-11
3.2MEMORY IC REPLACEMENT
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
S001 R DRIVE 137
PAL50 FULL STD H
• This model uses the memory IC.
• This memory IC stores data for proper operation of the video and drive circuits.
• When replacing, be sure to use an IC containing this (initial value) data.
3.2.1 MEMORY IC TABLE
Simbol Number of pins Mounting PWBMain content of data
IC7201
IC7602
48-pinDIGITAL PWBProgaram(Video process) of IC6001(System CPU) is memorized.
8-pinDIGITAL PWBSetting value of IC7301(MAIN CPU) is memorized.
3.2.2 MEMORY IC REPLACEMENT PROCEDURE
1. Power off
Switch off the power and disconnect the power plug from the AC outlet.
2. Replace the memory IC
Be sure to use the memory IC written with the initial setting values.
3. Power on
Connect the power plug to the AC outlet and switch on the power.
4. Receiving channel setting
Refer to the OPERATING INSTRUCTIONS and set the receive channels (Channels Preset) as described.
5. User setting
Check the user setting items according to the given in page later. Where these do not agree, refer to the OPERATING
INSTRUCTIONS and set the items as described.
6. SERVICE MODE setting
Verify what to set in the SERVICE MODE, and set whatever is necessary (Fig.1). Refer to the SERVICE ADJUSTMENT for setting.
3.2.3 SERVICE MODE SETTING
SERVICE MODE SCREEN
MAIN MENU SCREEN
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
ADJUSTMENT MODE SCREEN
S001 R DRIVE 137
PAL50 FULL STD H
SETTING ITEM
Setting itemsSettingsItem No.
Video system settingAdjustS001 - S009
Audio system settingAdjustT001 - T003
Main CPU system settingFixedM001 - M224
Drive system settingFixedF001 - F002
(Not used)FixedD001
(Not used)FixedZ001
1-12 (No.YA401)
Fig.1
3.2.4 SETTINGS OF FACTORY SHIPMENT
3.2.4.1BUTTON OPERATION3.2.4.2REMOTE CONTROL DIRECT OPERATION
Setting itemSetting position
POWEROff
CHANNELPR01
VOLUME10
TV/AVTV
3.2.4.3REMOTE CONTROL MENU OPERATION
(1) PICTURE
Setting itemSetting position
Picture ModeBright
White BalanceCool
Features
Super Digipure Auto
Pull Down Auto
Colour Management On
Picture Management On
Smart Picture Off
MPEG Noise Reduction On
Colour SystemMain Depends on PR
Sub Auto
4:3 Auto AspectPanoramic
(2) SOUND
Setting itemSetting position
Stereo / I•IIStereo Sound
BassCentre
TrebleCentre
BalanceCentre
Cinema SoundOff
Maxx BassLow
Voice EnhancerOff
CHANNELPR01
VOLUME10
ZOOMPanoramic
(4) FEATURES
Sleep TimerOff
AppearanceType A
Blue BackOn
Favourite SettingBlank
Child LockOff
Auto ShutoffOff
IlluminationBright
Power LampOn
(5) SET UP
Auto ProgramTv Channel Automatically Set
Edit/manualPreset Ch Only
LanguageEnglish
VIDEO-1 SettingComponent
VIDEO-3 SettingComponent
AI VolumeOn
Teletext LanguageGroup-1
Hdmi SettingAuto
Setting itemSetting position
Setting itemSetting position
Setting itemSetting position
(No.YA401)1-13
3.3REPLACEMENT OF CHIP COMPONENT
3.3.1 CAUTIONS
(1) Avoid heating for more than 3 seconds.
(2) Do not rub the electrodes and the resist parts of the pattern.
(3) When removing a chip part, melt the solder adequately.
(4) Do not reuse a chip part after removing it.
3.3.2 SOLDERING IRON
(1) Use a high insulation soldering iron with a thin pointed end of it.
(2) A 30w soldering iron is recommended for easily removing parts.
3.3.3 REPLACEMENT STEPS
1. How to remove Chip parts
2. How to install Chip parts
[Resistors, capacitors, etc.]
(1) As shown in the figure, push the part with tweezers and
alternately melt the solder at each end.
(2) Shift with the tweezers and remove the chip part.
[Transistors, diodes, variable resistors, etc.]
(1) Apply extra solder to each lead.
SOLDER
SOLDER
[Resistors, capacitors, etc.]
(1) Apply solder to the pattern as indicated in the figure.
(2) Grasp the chip part with tweezers and place it on the
solder. Then heat and melt the solder at both ends of the
chip part.
[Transistors, diodes, variable resistors, etc.]
(1) Apply solder to the pattern as indicated in the figure.
(2) Grasp the chip part with tweezers and place it on the
solder.
(3) First solder lead A as indicated in the figure.
(2) As shown in the figure, push the part with tweezers and
alternately melt the solder at each lead. Shift and remove
the chip part.
NOTE :
After removing the part, remove remaining solder from the
pattern.
1-14 (No.YA401)
A
B
C
(4) Then solder leads B and C.
A
B
C
SECTION 4
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
ADJUSTMENT
4.1ADJUSTMENT PREPARATION
(1) There are 2 ways of adjusting this TV : One is with the
REMOTE CONTROL UNIT and the other is the
conventional method using adjustment parts and
components.
(2) The adjustment using the REMOTE CONTROL UNIT is
made on the basis of the initial setting values. The
setting values which adjust the screen to the optimum
condition can be different from the initial setting
values.
(3) Make sure that connection is correctly made AC to AC
power source.
(4) Turn on the power of the TV and measuring instruments for
warming up for at least 30 minutes before starting
adjustments.
(5) If the receive or input signal is not specified, use the most
appropriate signal for adjustment.
(6) Never touch the parts (such as variable resistors,
transformers and condensers) not shown in the adjustment
items of this service adjustment.
4.2PRESET SETTING BEFORE ADJUSTMENTS
Unless otherwise specified in the adjustment items, preset the
following functions with the REMOTE CONTROL UNIT.
Setting itemSettings position
Picture ModeStandard
Picture AdjustmentsCentre
White BalanceMid
Super DigipureAuto
Pull DownAuto
Colour ManagementOn
Picture ManagementOn
ZoomFull
4.3MEASURING INSTRUMENT AND FIXTURES
• Signal generator (Pattern generator) [PAL]
• Remote control unit
4.5BASIC OPERATION OF SERVICE MODE
4.5.1 HOW TO ENTER THE SERVICE MODE
(1) Press [DISPLAY] key and [MUTING] key on the remote
control unit simultaneously to enter the SERVICE MODE
SCREEN.
(2) In the SERVICE MENU, press the [1] key to display
ADJUSTMENT MODE SCREEN.
SERVICE MENU SCREEN
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
NOTE:
• Before enter the SERVICE MODE, press the [MODE] key to
confirm that "TV" position is indicated. If it is in a wrong
position, the SERVICE MODE operation cannot be
performed.
• When a number key other than the [1] key is pressed in the
SERVICE MODE SCREEN, the other relevant screen may
be displayed.
This is not used in the adjustment procedure. Press the
[MENU] key to return to the SERVICE MODE SCREEN.
4.5.2 HOW TO EXIT THE SERVICE MODE
Press the [MENU] key to exit the Service mode.
4.5.3 SERVICE MODE SELECT KEY LOCATION
[MUTING] key
[Nunber] key
4.4ADJUSTMENT ITEMS
VIDEO CIRCUIT
• WHITE BALANCE (HIGH LIGHT) adjustment
[RETURN+] key
[Red] key
[MODE] key
[Function/] key
[DISPLAY] key
[Green] key
[MENU] key
[FUNCTION
/] key
(No.YA401)1-15
4.5.4 ADJUSTMENT MODE
S001 R DRIVE 137
PAL50 FULL STD H
This mode is used to adjust the VIDEO CIRCUIT and the MTS CIRCUIT.
4.5.4.1 HOW TO ENTER THE ADJUSTMENT MODE
When the SERVICE MENU SCREEN of SERVICE MODE is displayed, press [1] key to enter the ADJUSTMENT MODE.
4.5.5 DESCRIPTION OF STATUS DISPLAY
(3) PICTURE MODE
SOFT: SOFT
ADJUSTMENT MODE
STD: STANDARD
BRI: BRIGHT
SETTING ITEM No.
SETTING ITEM
SETTING VALUE (DATA)
(4) WHITE BALANCE
H: COOL
M: MID
S001 R DRIVE 137
PAL50 FULL STD H
L: WARM
(5) SETTING ITEM NAME
Setting item name are displayed. For the setting item names
to be displayed, refer to "INITIAL SETTING VALUES IN THE
SERVICE MODE".
Changed setting value is memorized by pressing [MUTING]
key.
1-16 (No.YA401)
4.6INITIAL SETTING VALUES IN THE SERVICE MODE
• Perform fine-tuning based on the "initial values" using the remote control when in the Service mode.
• The "initial values" serve only as an indication rough standard and therefore the values with which optimal display can be achieved
may be different from the default values. But, don't change the values that are not written in "ADJUSTMENT PROCEDURE". They
are fixed values.
(1) Receive a PAL 75% all white signal.
(2) Set PICTURE MODE to "STANDARD".
(3) Set ZOOM to "FULL".
(4) Set WHITE BALANCE to "MID".
(5) Select "1.ADJUST" from the SERVICE MODE.
(6) Adjust to Keep one of < S001 > (Red drive),
< S002 > (Green drive) or < S003 > (Blue drive)
unchanged, then lower the other two so that the
all-white screen is equally white throughout.
NOTE:
Set one or more of < S001 >, < S002 >, and
< S003 > to "137".
(7) Check that white balance is properly tracked
from low light to high light. If the white balance
tracking is deviated, adjust to correct it.
(8) Press the [MUTING] key to memoirze the set
value.
(No.YA401)1-19
SECTION 5
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
LOB 0 FAN 0
AUD 0
ANA 9 DIG 9
0000 00
00
TMP 0 L 1 0
L 2 0 DDT 0
FAN 0 L C 0
IRS 0
TROUBLESHOOTING
5.1SELF CHECK FEATURE
5.1.1 OUTLINE
This unit comes with the "Self check" feature, which checks the
operational state of the circuit and displays/saves it during
failure.Diagnosis is performed when power is turned on, and
information input to the main microcomputer is monitored at all
time.Diagnosis is displayed in 2 ways via screen display and LED
flashes. Failure detection is based on input state of I
2
C bus and
the various control lines connected to the main microcomputer.
5.1.2 HOW TO ENTER THE SELF CHECK MODE
Before enter the SELF CHECK MODE, press the [MODE] key to
confirm that "TV" position is indicated. If it is in a wrong position,
the SELF CHECK MODE operation cannot be performed.
(1) Press the [DISPLAY] key and [MUTING] key
simultaneously, then enter the SERVICE MODE.
(2) Press the [2] key SELF CHECK MODE.
(3) Press the [RED] key to enter Page 2 of the SELF CHECK
MODE.
*Use the [GREEN] key to toggle between Page 1 and Page 2.
NOTE:
When a number key other than the [2] key is pressed in the
SERVICE MODE screen, the other relevant screen may be
displayed.
This is not used in the SELF CHECK MODE. Press the
[MENU] key to return to the MAIN MENU SCREEN.
5.1.3 HOW TO EXIT THE SELF CHECK MODE
To Save Failure History:
Turn off the power by unplugging the AC power cord plug when
in the Self check display mode.
To Clear (Reset) Failure History:
Turn off the power by pressing the [POWER] key on the remote
control unit when in the Self check display mode.
5.1.4 FAILURE HISTORY
Failure history can be counted up to 9 times for each item. When
the number exceeds 9, display will remain as 9. Failure history
will be stored in the memory unless it has been deleted.
NOTE:
Only SYNC (with/without sync signals) will be neither counted
nor stored.
5.1.5 POINTS TO NOTE WHEN USING THE SELF CHECK
FEATURE
In addition to circuit failures (abnormal operation), the following
cases may also be iagnosed as "Abnormal" and displayed and
counted as "NG".
(1) Temporary defective transmissions across circuits due to
pulse interruptions
(2) Misalignment in the on/off timing of power for I
2
C bus
(VCC) when turning on/off the main power.
Diagnosis may be impeded if a large number of items are
displayed as "NG". As such, start Self check check only after 3
seconds in the case of receivers and 5 seconds in the case of
panels upon turning on the power. If recurrences are expected,
ensure to clear (reset) the failure history and record the new
diagnosis reults.
SERVICE MENU SCREEN
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
SELF CHECK MODE SCREEN (Page 1)
LOB 0 FAN 0
AUD 0
ANA 9 DIG 9
0000 00
00
ItemFailure history
1-20 (No.YA401)
SELF CHECK MODE SCREEN (Page 2)
TMP 0 L 1 0
L 2 0 DDT 0
FAN 0 L C 0
IRS 0
ItemFailure history
Fig.1
5.1.6 DETAILS
Self check is performed for the following items:
< Page 1 of screen >
Detection itemDisplayDetection content
Low bias line short
protection
Fan lockFANNot used--------
Abnormal rise of
temperature in audio
circuit
Devices on the ANALOG
PWB
Devices on the DIGITAL
PWB
< Page 2 of screen >
Detection itemDisplayDetection content
Temp. sensorTEMNot used--------
Lamp does not light upL1Not used--------
Lamp goes outL2Not used--------
Abnormal DD CPU
circuit
Fan lockFANNot used--------
Lamp cover openLCNot used--------
Abnormal of optical irisIRSNot used--------
LOBConfirm the operation of the low bais (16V / 5V /
LCD5V / 3.3V / 1.2V) protection circuit.
, Q9651[DC-DC PWB]
Q9601
AUDConfirmation of the temperature of audio circuit.
TH6401
ANAConfirmation of reply of ACK signal which uses
I2C communication.
IC101
[ANALOG PWB]
DIGConfirmation of reply of ACK signal which uses
I2C communication.
IC6401
DDTNot used--------
[D-AMP PWB]
, IC102, IC381, IC601, IC606, TU3001
[DIGITAL PWB]
Diagnosis
signal (line)
LB_PRODetection starts 3 seconds after
the power is turned on. If error
continues between 200 ms the
power is turned off.
----Detection starts 3 seconds after
the power is turned on.
If the temperture of 90°C is
detected for 3 seconds the power
is turned off.
SDAIf it checks whenever I2C
communication is performed and
no reply of ACK signal an error
will be counted.
SDAIf it checks whenever I2C
communication is performed and
no reply of ACK signal an error
will be counted.
Diagnosis
signal (line)
Detection timing
Detection timing
5.1.7 METHOD OF DISPLAY WHEN A RASTER IS NOT OUTPUT
In the state where a raster is not output by breakdown of the set, an error is displayed by blink of the POWER LED.
Type of errorPOWER LED flash cycle
Low bias line short protectionBlue turnig on and off at 1 second intervals.
Abnormal rise of temperature in audio circuit Blue turnig on and off at 0.5 second intervals.
< Explanation of operation >
If error is detected, the power is turned off.
Shortly after a power is turned off, POWER LED will be blinked.
Power cannot be turned on until the power cord takes out and inserts, after a power is turned off.
(No.YA401)1-21
Victor Company of Japan, Limited
Flat Panel Display Category 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan