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SPECIFICATION
ItemsContents
Dimensions (W × H × D)70.3 cm × 56.0 cm × 26.0 cm (Included stand)
70.3 cm × 49.1 cm × 9.4 cm (TV only)
Mass19.0 kg (Included stand)
18.3 kg (TV only)
TV RF SystemB, G, I, D, K, K1, M
Colour SystemPAL / SECAM / NTSC 3.58 / NTSC 4.43 (NTSC:EXT only).
Stereo SystemA2 (B/G, D/K), NICAM (B/G, I, D/K)
Teletext SystemFLOF (Fastext), TOP, WST (World Standard System)
Receiving
Frequency
Intermediate
Frequency
Colour Sub
Carrier
Power InputAC110 - AC240 V, 50 Hz / 60 Hz
Power Consumption148 W, [Standby: 2.8 W]
LCD panel26V, aspect ratio 15:9
Screen SizeViewable area 66 cm (measured diagonally) H:33.9 cm × V:56.6 cm
Display ResolutionHorizonal : 1280 dots × Vertical : 768 dots (W-XGA)
Speaker6.6 cm round × 2 (Oblique corn)
Audio Power Output10 W + 10 W (Rated power output)
Aerial Input75 Ω unbalanced, coaxial
Video / Audio
Input-1/2/3/4
Video / Audio
Output
Headphone jack3.5 mm stereo mini jack × 1
Remote Control UnitRM-C1808 (UM-3/AA/R6 dry cell battery × 2)
Design and specifications subject to change without notice.
1-2 (No.YA019)
SECTION 1
PRECAUTION
1.1SAFETY PRECAUTIONS
(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) If any repair has been made to the chassis, it is
recommended that the PDP voltage setting should be
checked or adjusted.
(6) When service is required, obse rve the original lea d 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 evi dence of
overheating should be replaced. Always use the
manufacturer's replacement components.
(7) 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 Chec k
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 ac ross 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
METAL PART
(No.YA019)1-3
1.2INSTALLATION
1.2.1 HEAT DISSIPATION
If the heat dissipation vent behind this unit is blocked, cooling efficiency may deteriorate and temp erature inside the unit will rise.
Therefore, please make sure pay attention not to block the heat dissipation vent as well as th e ventilation outlet behi nd the unit and
ensure that there is room for ventilation around it.
Distance recommendations
Avoid improper installation and never position the unit where good
ventilation is impossible.
150 mm
When installing this TV, distance recommendations must be maintained
between the set and the wall, as well as inside a tightly enclosed area or
piece of furniture.
Keep to the minimum distance guidelines shown for safe operation.
1.2.2 INSTALLATION REQUIREMENTS
To ensure safety in an emergency such as an earthquake, and to pr event accidents, e nsure that measures are taken to preve nt the
TV dropping or falling over.
Use the supplied screws to firmly attach the supplied hooks to the back of the TV, and use commercially available cord to fix the TV
to rigid components such as walls and columns.
200 mm200 mm
150 mm
50 mm
Supplied hooks
1.2.3 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 ta ke 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.
1-4 (No.YA019)
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 o f 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 ve ry vulnerable to
lateral impacts and may break. During transportation, ensure that the unit is loa ded along the tr aveling d irection of the vehic le,
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 di rect sunlight over a prolonged period of ti me. 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 outin g 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 th e 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).
1.4MAIN DIFFERENCE LIST
Items
POWER CORDQMPK300-170-JC
LT-Z26S2LT-Z26S2/A
QMPG110-170-JC
LT-Z26S2/S
QMPN260-170-JC
(No.YA019)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1FEATURES
2.1.1 FUNCTION / CIRCUITS
• DIST (Digital Image Scaling Technolo gy)
Employs an interpolation method that doubles the scanning lines to realize 480-line flickerfree picture making it especially su itable
for reproducing high-resolution pictures even on large-screen displays.
• DIGITAL VNR
The DIGITAL VNR function cuts down the amount of noise in origi nal pi cture. There are three fu nction setting s of AUTO,MIN and
MAX.
• Super DigiPure
This function uses the latest technology to give viewer a natural looking picture.
It consist of DigiPure and picture motion compensation function.
• COLOUR MANAGEMENT
This function ensures dull colours are compensated to produce natural hues.
2.2TECHNICAL INFORMATION
2.2.1 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.
2.2.1.1STRUCTURE
The LCD panel of the unit is constructed with the metal chassis that surrounds the p anel unit and supports the LCD p anel part and
the backlight part to protect them.
The colour filter glass and the TFT glass (thi n film transistor) are inserted between the front polarizing filter and the rea r polarizing
filter. Liquid crystals are inserted between the colour filter glass and the TFT glass. Since the gap between the two glasses i s only a
few µm, a spacer (bead) is inserted in the gap to retain the gap.
The backlight unit is placed behind the LCD panel. Since liquid crystals themselves do not emit light, the backlight as an external light
source emits light to the LCD panel from behind through the diffuser.
Circuit boards for controlling the LCD panel and the backlight are attached around the back part of the LCD panel unit.
Since the unit has the two polarizing filter that are at right angles to each other, the u nit adopts "normally black" mode, where lig ht
does not pass through the polarizing filter and the screen is black when no voltage is applied to the liquid crystals.
Top chassis
Diffuser supporter
Lower frame
Upper frame
Panel ASSY
Diffuser (including board)
Fig.1 Structure of the LCD panel unit
Source board
Lamp supporter
Inverter shield cover
Sield case
Inverter board
Reflection plate
1-6 (No.YA019)
2.2.1.2SPECIFICATIONS
The following table shows the specifications of this unit.
ItemSpecificationsRemarks
Maximum dimensions ( W × H × D )62.7cm × 38.9cm × 4.9cm
Weight8.0kg
Effective screen sizeDiagonal : 66cm (H:33.9cm × V : 56.6cm) 26V type
Aspect ratio15:9
Drive device/ systema-Si-TFT, active matrix system
ResolutionHorizontally 1280 × Vertically 768 × RGB <W-XGA>2949120 dots in total
Pixel pitch (pixel size)Horizontally:0.4425mm, Vertically:0.4425mm
Displayed colour16777216 colours256 colours for R, G, and B
Brightness450cd/m
2
500cd/m2 at maximum
Contrast ratio500:1
Response time16.7ms
View angleVertically 170°, horizontally 170°
2.2.1.3PIXEL FAULT
There are three pixel faults - bright fault , dark fault and flicker fault - that are respectively defined as follows.
(1) 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.
(2) 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.
(3) 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.YA019)1-7
2.2.2 MAIN CPU PIN FUNCTION (IC001)
Pin No.Pin NameI/ORemark
1TCKI Test purpose
2TMSI Test purpose
3TDII Test purpose
4TDOO Test purpose
5P2.8I/O Remote control input
6P2.9I/O Mechanical power switch detection [Pushing:L]
7P2.10I/O
8P2.11I/O IP reset
9P2.12I/O Port for TV-LINK communication
10P2.13I/O Power ON/OFF [ON:L]
11P2.14I/O Protector detection [Detection:L]
12P2.15I/O Power condition check [ON:L]
13VSS33I GND
14VDD33I 3.3V
15P4.5I/O Port for TV-LINK communication
16A20O Memory bus address
17A19O Memory bus address
18A18O Memory bus address
19A17O Memory bus address
20VSS25I GND
21VDD25I 2.5V
22A16O Memory bus address
23A8O Memory bus address
24A7O Memory bus address
25A9O Memory bus address
26A6O Memory bus address
27A5O Memory bus address
28A10O Memory bus address
29A11O Memory bus address
30A12O Memory bus address
31VSS33I GND
32VDD33I 3.3V
33A4O Memory bus address
34A3O Memory bus address
35A2O Memory bus address
36A1O Memory bus address
37A0O Memory bus address
38A13O Memory bus address
39RAS/A14O Memory bus address
40CAS/A15O Memory bus address
41VSS33I GND
42VDD33I 3.3V
43MEMCLKO Clock for memory
44CSSDRAMO Chip select for memory
45CLKENO Clock enable for memory
46CSROMO Chip select for memory
47RDO Read for memory
48UDQMO Control IN/OUT buffer of Memory (IC003)
49LDQMO Control IN/OUT buffer of Memory (IC003)
50WRO Write for memory
51D15I/O Data bus
52VSS33I GND
53VDD33I 3.3V
54D7I/O Data bus
55D0I/O Data bus
56D14I/O Data bus
57D8I/O Data bus
58D6I/O Data bus
59D1I/O Data bus
60VSS33I GND
61VDD33I 3.3V
62D13I/O Data bus
63D9I/O Data bus
64D5I/O Data bus
IP error detection [Detection:L]
Pin No.Pin NameI/ORemark
65D2I/O Data bus
66D12I/O Data bus
67D10I/O Data bus
68VSS33I GND
69VDD33I 3.3V
70D4I/O Data bus
71D3I/O Data bus
72D11I/O Data bus
73RSTINI Reset
74P3.0I/O
75P3.1I/O
I2C CLOCK 0 (for memory)
I2C DATA 0 (for memory)
76P3.2I Remote control input
77P3.3I/O Clock for OSD
78P3.4O Tuner system switch
79P3.5O Tuner system switch
80P3.6I Teletext mode:H
81P3.7I Power START
82P3.8I Not used
83P3.9I Picture mute
84VSS33I GND
85VDD33I 3.3V
86VSS25I GND
87VDD25I 2.5V
88TXD0I/O Sub micro computer communication
89RXD0I/O Sub micro computer communication
90P3.12I Not used
91P3.13I/O Not used
92P3.15I/O Not used
93P5.14(YS2)I/O YS2 of SCART RGB
94P5.15I/O Headphone detection [Detection:L]
95TRIG_INI/O Not used
96TRIG_OUTI/O Not used
97P6.2I Not used
98P6.3I/O
99P6.4I/O
I2C bus clock for IC control
I2C bus data for IC control
100P6.5I/O Multi-sound process reset
101P6.6I/O
I2C bus data for IC control
102VSYNCO Vertical sync for OSD
103HSYNCO Horizontal sync for OSD
104COR/RSTOUT O Not used
105BLANKO Ys for OSD/Teletext
106VDD33I 3.3V
107VSS33I GND
108XTAL1I 6MHz
109XTAL2O 6MHz
110VSSAI GND
111VDDAI Not used
112RO R for OSD Teletext
113GO G for OSD Teletext
114BI B for OSD Teletext
115VSSAI GND
116VDDAI 2.5V
117CVBS2I Video for Teletext
118VSSAI GND
119VDDAI 2.5V
120CVBS1BI Video for Teletext
121CVBS1AI Video for Teletext
122VSSAI GND
123VDDAI 2.5V
124P5.0I AFT for tuner
125P5.1(KEY1)I Key scan data 1 [ON:H]
126P5.2I AGC for tuner
127P5.3(KEY2)I Key scan data 2 [ON:H]
128TMODEI Test purpose
1-8 (No.YA019)
2.2.3 SUB CPU PIN FUNCTION (IC7807)
Pin No.Pin nameI/OFunction
1(SYSTEM0)IGND
2(SYSTEM3)IGND
3AVCCI5V
4X2-Sub clock
5X1-Sub clock
6VCL-Internal down voltage
7RESIReset [Reset : L]
8TESTIOperation test for SUB CPU
9VSS-GND
10OSC2O10MHz oscillation for system clock
11OSC1I10MHz oscillation for system clock
12VCCI5V
13NCONot used
14NCONot used
15BL_D2OBack light 20ms delay for LCD panel [On:L]
16BL_D1OBack light 10ms delay for LCD panel [On:L]
17I2C_STOPONot used
18BL_ONOBack light reset for LCD panel [Reset:L]
19NCONot used
20NCONot used
21NCONot used
22NCONot used
23SDA1I/O
24A.DIMONot used
25SCL1O
26SDA0I/O
27SCL0O
28NCONot used
29NCONot used
30NCONot used
31NCONot used
32NCONot used
33NCONot used
34NCONot used
35NMIIPort for writing on board [Writning:L]
36NCONot used
37(HD)INot used
38NCONot used
39(REMO)INot used
40NCONot used
41P85-/INot used
42P86-Not used
43P87-Not used
44SCK3OPort for writing on board
45RXDIPort for writing on board
46TXDOPort for writing on board
47(PROTECTOR0)INot used
48NCONot used
49RXD2IPort for communication (Main CPU)
50TXD2OPort for communication (Main CPU)
51NCONot used
52(ACTIVE)INot used
53VDIVertical sync
54(REC_DET)INot used
55(PSS)INot used
56(ALARM)INot used
57(SYSTEM2)INot used
58(SYSTEM1)INot used
59(PROTECTOR1)INot used
60(AMP_PRO2)INot used
61(AMP_PRO1)INot used
62EE_CDSINot used
63(KEY_IN1)INot used
64(KEY_IN2)INot used
2
C bus data (For Sub memory)
I
2
C bus clock (For Sub memory)
I
2
C bus data (For general)
I
2
C bus clock (For general)
I
(No.YA019)1-9
SECTION 3
DISASSEMBLY
3.1DISASSEMBLY PROCEDURE
CAUTION:
Since this model is a laminating structure assembly, please
perform in following order in the case of disassembling.
3.1.1 REMOVING THE STAND ASS'Y (Fig.3-1-1)
(1) Remove the 2 screws [A], and remove the COVER.
(2) Remove the 4 screws [B], and remove the STAND ASS'Y.
JACK COVER(R)
JACK COVER(L)
STAND COVER
A
3.1.2 REMOVING THE REAR COVER (Fig.3-1-1, Fig.3-1-2)
• Remove the STAND ASS'Y.
(1) Remove the JACK COVER(R) and JACK COVER(L).
(2) Remove the 7 screws [C], 3 screws [D], 4 screws [E], and
remove the REAR COVER.
B
STAND
Fig.3-1-1
C
REAR COVER
E
E
C
E
D
C
D
D
C
E
C
C
C
1-10 (No.YA019)
Fig.3-1-2
3.1.3 REMOVING THE FUN BRACKET, REGULATOR PWB AND POWER CORD (Fig.3-1-3)
• Remove the STAND ASS'Y.
• Remove the REAR COVER.
F
(1) Disconnect the wire(CONN. [Y]) of COOLING FAN.
(2) Remove the 5 screws [F], and remove the FAN BRACKET.
(3) Remove the REGULATOR PWB, and disconnect the
POWER CORD.
(4) Remove the 1 screw [G], and remove the POWER CORD
COOLING FAN
HOLDER.
REGULATOR
PWB
3.1.4 REMOVING THE RECEIVER PWB (Fig.3-1-4)
• Remove the STAND ASS'Y.
• Remove the REAR COVER.
(1) Remove the 2 screws [H] and 3 screws [J], then remove the
TERMINAL BASE.
TERMINAL BASE
H
K
(2) Remove the 5 screws [K], and remove the RECEIVER
PWB.
FAN BRACKET
F
POWER CORD
G
POWER CORD HOLDER
Fig.3-1-3
RECEIVER PWB
K
J
3.1.5 REMOVING THE FRONT CONTROL PWB AND FRONT SENSOR PWB (Fig.3-1-5)
• Remove the STAND ASS'Y.
• Remove the REAR COVER.
(1) Remove the 2 screws [L], and remove the CONTROL
KNOB.
(2) Remove the 3 screws [M], then remove the FRONT
EARTH
PLATE
L
M
CONTROL PWB and the FRONT SENSOR PWB.
CONTROL
KNOB
Fig.3-1-4
FRONT CONTROL PWB
FRONT SENSOR PWB
Fig.3-1-5
(No.YA019)1-11
3.1.6 REMOVING THE VIDEO PWB (Fig.3-1-6)
• Remove the STAND ASS'Y.
• Remove the REAR COVER.
(1) Remove the 2 screws [N], then remove the JACK BASE.
(2) Remove the 4 screws [P], and remove the VIDEO PWB.
(3) Remove the 2 screws [Q], and remove the TUNER PWB
BASE.
(4) Remove the 4 screws [R], and remove the TUNER PWB
and the MSP PWB.
3.1.7 REMOVING THE MI-COM & DIST PWB (Fig.3-1-7)
• Remove the STAND ASS'Y.
• Remove the REAR COVER.
(1) Remove the 6 screws [S], and remove the VIDEO PWB
BRACKET.
(2) Remove the 4 screws [T], and remove the MI-COM & DIST
PWB from the VIDEO PWB BRACKET.
VIDEO PWB
TUNER PWB
MI-COM
&DIST
PWB
P
Fig.3-1-6
N
JACK BASE
R
TUNER PWB
BASE
Q
MSP PWB
VIDEO PWB BRACKET
S
3.1.8 REMOVING THE POWER PWB (Fig.3-1-8)
• Remove the STAND ASS'Y.
• Remove the REAR COVER.
• Remove the FUN BRACKET.
• Remove the POWER CORD.
• Remove the VIDEO PWB.
(1) Remove the 4 screws [U], and remove the AV JACK
BRACKET.
(2) Remove the 6 screws [V], and remove the POWER PWB.
(3) Remove the 6 screws [W], and remove the POWER PWB
BASE.
T
Fig.3-1-7
V
POWER PWB
W
U
W
U
1-12 (No.YA019)
AV JACK
BRACKET
POWER PWB BASE
Fig.3-1-8
3.1.9 REMOVING THE SPEAKER (Fig.3-1-9A, Fig.3-1-9B)
• Remove the STAND ASS'Y.
• Remove the REAR COVER.
• Remove the POWER CORD.
(1) Remove the 5 screws [a], and remove the SPEAKER BOX.
a
SPEAKER BOX
a
Fig.3-1-9A
(2) Remove the 4 screws [b], and remove the SPEAKER (L/R).
(3) Remove the 4 screws [c], and remove the DUCT COVER/
DUCT BASE.
NOTE:
Since the speaker is attached in a certain direction, attach the
speaker in the same correct direction as it has been attached.
DUCT BASE/DUCT COVER
c
b
SPEAKER
㧔R㧕
Fig.3-1-9B
c
b
SPEAKER
㧔L㧕
(No.YA019)1-13
3.1.10 REMOVING THE LCD PANEL (Fig.3-1-10A, Fig.3-1-10B, Fig.3-1-10C)
• Remove the STAND ASS'Y.
• Remove the REAR COVER.
• Remove the POWER CORD.
• Remove the RECEIVER PWB.
• Remove the FRONT CONTROL PWB.
• Remove the FRONT SENSOR PWB.
• Remove the VIDEO PWB.
• Remove the MI-COM & DIST PWB
• Remove the POWER PWB.
(1) Remove the 8 screws [d] and 2 screws [e], then remove the
LCD PANEL.
d
(2) Remove the 2 screws [f], and remove the 2 CENTRE
FRAMES.
d
CENTRE
FRAME
d
e
d
e
Fig.3-1-10A
f
(3) Remove the 2 screws [g] and 2 screws [h], then remove the
RIGHT FRAME.
(4) Remove the 2 screws [g] and 2 screws [h], then remove the
LEFT FRAME.
(5) Remove the 2 screws [j], and remove the TOP FRAME.
(6) Remove the 3 screws [k] and 2 screws [m], then remove
the BOTTOM FRAME.
f
X
P
Q
Fig.3-1-10B
g
RIGHT
FRAME
h
j
TOP
FRAME
k
LEFT FRAME
h
g
BOTTOM
FRAME
1-14 (No.YA019)
m
Fig.3-1-10C
3.2REPLACEMENT OF MEMORY IC
SERVICE MENU SCREEN
SYSTEM CONSTANT SET SCREEN
This unit uses the nonvolatile memory IC.The memory IC memories data for video a nd deflection circuits. To replace the memory IC
without the data written, malfunctions might occurred while power is on, and the normal image might not appear. When replacing the
memory IC, be sure to use the IC written with the initial values of data.
3.2.1 PROCEDURE FOR REPLACING THE MEMORY IC
(1) Switch the power off and unplug the powe r cord from the
wall outlet.
(2) Replacing the memory IC. [Be sure to use the IC written
with the initial values of data]
(3) Plug the power cord into the wall outlet and switch the
power on.
(4) Check and setting of SYSTEM CONSTANT SET
a) Press the [INFORMATION] key and [MUTING] key
on the remote control unit simultaneously.
The SERVICE MENU screen will be displayed. (See
Fig.1)
b) In the SERVICE MENU, press the [INFORMATION]
key and [MUTING] key simultaneously.
Then, the SYSTEM CONSTANT SET screen will be
displayed. (See FIg.2)
c) Check whether the setting value of the SYSTEM
CONSTANT SET is the same as these indicated in
Table 1.
d) Press the [INFORMATION] key twice to return to the
normal screen.
(5) Receive channel setting
Refer to the OPERATING INSTRUCTIONS and set the
receive channels.
(6) User setting
Memories the user setting items.The [USER SETTINGS
OF MENU] setting is as next page.
(7) Setting of SERVICE MENU
Check the setting items in the SERVICE MENU, set if
necessary.For setting method, please refer to the
[ADJUSTMENT PREPARATION] to [ADJUSTMENT
PROCEDURE] of ADJUSTMENT section.
SERVICE MENU SCREEN
SERVICE MENU
1. IF2. V/C
3. AUDIO4. DD/CM
5. VSM PRESET6. STATUS
7. VNR8. IP
9. SHIPPING (OFF)0. BUS FREE
1-9 : SELECTi : EXIT
Fig.1
SYSTEM CONSTANT SET SCREEN
SYSTEM CONSTANT SET
1. DESTINATION ASIA
-/+ : STOREi : EXIT
OK
3.2.2 SETTING OF THE SYSTEM CONSTANT SET
Setting itemSetting contentSetting value
DESTINATIONASIA / EUROASIA
Table 1
3.2.3 FACTORY SHIPMENT SETTING
3.2.3.1USER SETTING OF SWITCHS ON REMOTE CONTROL UNIT
Setting itemSetting value
POWEROFF
CHANNELPR1
PRESET CHANNELRefer to OPERATION INSTRUCTIONS
VOLUME10
ZOOMPANORAMIC
CINEMA SURROUND OFF
Table 2
Fig.2
(No.YA019)1-15
3.2.3.2USER SETTINGS OF MENU
Setting itemSetting valueSetting itemSetting value
POWEROFFSOUND SETTING
CHANNELPR1A. H. BON
BASSCenter
PRESET CHANNELRefer to
OPERATING INSTRUCTIONS
VOLUME10SPEAKERON
PICTURE SETTINGBBEON
PICTURE MODEBRIGHTCI NEMA SURROUNDOFF
WHITE BALANCECOOLHEADPHONE
PICTURE FEATURESFEATURES
DIGITAL VNRAUTOSLEEP TIMEROFF
Super DigiPureAUTOBLUE BACKON
COLOUR SYSTEMTV: Depend on PR/CH
EXTERNAL: AUTO
PULL DOWNAUTOLANGUAGEENGLISH
4:3 AUTO ASPECTPANORAMICAUTO PROGRAMGROUP-1
COLOUR MANAGEMENT ONEDIT/MANUALOnly for preset channels
PIPRight below
(1) Enter "5.VSM PRESET" from the SERVICE MENU.
(2) Press the [OK] key to select BRIGHT/STD/SOFT/COOL/NORMAL/WARM mode.
(3) Select the setting item using the [FUNCTION (UP/DOWN)] key.
(4) Set the value using the [FUNCTION (+/-)] key.
(5) Press the [OK] key to memorize the set value.
(6) Press the [INFORMATION] key twice to return to the normal screen.
Variable
range
BRIGHTSTDSOFTCOOLNORMALWARM
TREBLECenter
BALANCECenter
VOLUME
TV SPEAKER
OUTPUT
CHANNEL GUARD SET ID NO
INSTALL
Table 3
Setting value
PICTURE MODEWHITE BALANCE
Table 4
20
OFF
MAIN
0000
1-16 (No.YA019)
3.2.3.4SERVICE MENU SETTING ITEMS
Setting itemSetting valueSetting itemSetting value
(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 ea sily removing parts.
3.3.3 REPLACEMENT STEPS
1. How to remove 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.
2. How to install Chip parts
[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 extra solder to each lead.
SOLDER
SOLDER
(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.
[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.
A
B
C
(4) Then solder leads B and C.
A
B
C
1-18 (No.YA019)
SECTION 4
ADJUSTMENT
4.1ADJUSTMENT PREPARATION
(1) Prior to the following procedure, be sure to connect the
receiver unit and the display unit.
(2) Adjustment of many Majority of the adjustme nt items for
this unit is performed using the remote control.
(3) However, adjustment of some adjustment items is
performed in the conventional way, i.e. with components
on the boards.
(4) Ensure that the power supply is AC220V.
(5) Allow the set and the measuring devi ces to run for at least
30 minutes.
(6) Do not alter settings of items/preset values on the service
screen that are not stated in this manual.
(7) Unless otherwise stated in the “ADJUSTMENT
PROCEDURE” section, follow the settings for the features
stated below using the remote control.
Setting itemSettings
PICTURE MODESTANDARD
PICTURE adjustmentAll center (00)
WHITE BALANCEMID
DIGITAL VNRMIN
Super Digi PureAUTO
PULL DOWNAUTO
COLOUR MANAGEMENTON
SOUND adjustmentAll center (00)
BBEOFF
CINEMA SURROUNDOFF
AHBOFF
SPEAKERON
ZOOMFULL
4.5BASIC OPERATION OF THE SERVICE MENU MODE [USING REMOTE CONTROL UNIT]
SERVICE MENU SCREEN
4.5.1 TOOLS OF SERVICE MENU OPERATION
Operate the SERVICE MENU with the remote control unit.
4.5.2 HOW TO ENTER THE SERVICE MENU MODE
4.5.5 SETTINGS OF THE SERVICE MENUS
4.5.5.1[1. IF] (VCO adjustment, ATT setting)
[Do not adjust]
(1) Press the [INFORMATION] key and the [MUTING] key of
the REMOTE CONTROL UNIT simultaneously, and the
SERVICE MENU screen of Fig.4 will be displayed.
(2) When the Main Menu is displayed, press any key of the [1]
to [0] key to enter the corresponding menu mode.
*Press any of the [1] to [0] keys before the Service Menu
mode disappears.
(3) Select the service item using the [FUNCTION (/)] key.
(4) Set the value using the [FUNCTION (/)] key.
4.5.5.2[2. V/C] (VIDEO setting)
[Do not change settings of items that are not included in the
"ADJUSTMENT PROCEDURE".]
Sets output data to the video circuit.
• [Function (/)] key
For scrolling up/down the setting items.
• [Function (/)] key
For scrolling up/down the setting values.
[Do not adjust.]
Sets output data to the deflection circuit.
4.5.5.5[5. VSM PRESET] (PICTURE preset setting)
[Refer to page VSM PRESET SETTING.]
4.5.5.6[6. STATUS]
(The version of software, the aspect, and the state
of debugging are displayed. )
[Setting for this item is not required in servicing]
Fig.4
4.5.3 HOW TO EXIT THE SERVICE MENU MODE
Press the [INFORMATION] key to exit the Service Menu mode.
4.5.4 SERVICE CONTROL KEY LAYOUT ON THE REMOTE
CONTROL UNIT
MUTING
1~0
INFOMATION
ZOOM
OK
FUNCTION /
FUNCTION /
4.5.5.7[7. VNR] (Noise reduction setting)
[Do not adjust]
Sets output data to the digital noise reduction circuit.
4.5.5.8[8. IP] (DIST setting)
[Do not adjust]
Sets output data to the DIST circuit.
4.5.5.9[9. SHIPPING (OFF)]
[Setting for this item is not required in servicing]
4.5.5.10 [10. BUE FREE]
[Setting for this item is not required in servicing]
1-22 (No.YA019)
Fig.5
4.6DEFAULT VALUES IN THE SERVICE MENU SETTING MODE
• Perform fine-tuning based on the "default values" using the remote control when in the SERVICE MENU setting mode.
• The "default 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.
4.6.1 [2. V/C]
4.6.1.1VIDEO SYSTEM
Item No.Item
1CUT OF R0000~02550088←←←←0000←←←
2CUT OF G0000~02550101←←←←0000←←←
3CUT OF B0000~02550106←←←←0000←←←
4DRIVE R0000~02550129←←←←0000←←←
5DRIVE G0000~02550112←←←←0000←←←
6DRIVE B0000~02550110←←←←0000←←←
7TWIN HI R0000~01270071←←←←0000←←←
8TWIN HI B0000~01270068←←←←0000←←←
9BRIGHT0000~02550013←←←←0000←←←
10CONT0000~00150006←←←←0000←←←
11TWN BRG0000~01270080←←←←-002←0000←
12TWN CNT0000~00150008←←←←0000←←←
13COLOUR0000~00150007←0000←00070000←←←
14HUE0000~00630000←0034←←0000←←←
15BY GAIN0000~00630043←0000←00430000←←←
16TWN COL0000~00150008←0002←00080002←←←
17TWN TNT0000~00630034←0000←00340000←←←
18B OF MR0000~00150008←←←←←←←←
19B OF MB0000~00150008←←←←←←←←
20B OF SR0000~00150008←←←←←←←←
21B OF SB0000~0 0150008←←←←←←←←
22M BOFSET0000~00070000←←←←←←←←
23M ROFSET0000~00070000←←←←←←←←