XGA : 1024 pixels × 768 pixels (Horizontal : 48.4 kHz / Vertical : 60 Hz)
Audio 3.5 mm stereo mini jack × 1
(Digital-input terminal is not compatible with picture signals of computer signal)
Audio Digital: HDMI connector × 3
Analog: 500mV(rms) (-4dBs), high impedance, RCA pin jack × 2 [HDMI-1]
Audio 500mV (rms), Low impedance, RCA pin jack × 2
(No.YA702<Rev.005>)1-5
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) 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
0.7mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.35V
AC (r.m.s.). This corresponds to 0.3mA AC (r.m.s.).
AC VOLTMETER
(HAVING 1000 /V,
OR MORE SENSITIVITY)
1-6 (No.YA702<Rev.005>)
0.15 F AC-TYPE
GOOD EARTH GROUND
1500 10W
PLACE THIS PROBE
ON EACH EXPOSED
ME TAL PAR T
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
*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.
150 mm
200 mm
POWER
150 mm
200 mm
50 mm
1.2.3 NOTES ON HANDLING
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.
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.
*Diagram differs from actual appearance.
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.
It fixes in a band.
TV STAND
*Diagram differs from actual appearance.
(No.YA702<Rev.005>)1-7
1.3.2 OPTICAL 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).
1.3.4 HOW TO CHECK THE OPERATING TIME
This model has a function to count and record the LCD panel
operating time. The operating time can be checked in the
following procedure.
• Maximum count time = 131072 hours
(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) The operating time of the LCD panel is displayed in 6
-digit decimal number.(Refer to the below figure)
SERVICE MODE SCREEN
SERVICE MENU Ver.xxx
1. ADJUST
2. SELF CHECK
3. I2C STOP
Press [2] key
SELF CHECK MODE SCREEN
The operating time is displayed.
LOB 9 AV SW
MEM 0 MEI 3
TUN 0 HDM 3
SYN NG SMD 3
CMD 0 HDMI SW 0
SCL2:H SDA2:H SMD RST0000
TIME 685536
TOTAL 1371072 MAX
The total operating time is displayed.
[Can not reset.]
*When the power is turned off with the remote control unit or the power
button of the main unit, the count restarts from the turn off time.
*When the power is turned off by disconnecting the power cord from the
AC outlet, the recorded time count less than 2 hours is not counted.
*When the operating time exceeds the maximum count time, "MAX" is
displayed to the right of the counted time, and the following count is
discontinued.
MAX is displayed when the maximum
count time is exceeded.
1.3.5 HOW TO RESET THE OPERATING TIME
(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) When the self check screen is displayed, press [ZOOM]
key to reset the operating time.
NOTE:
• When the LCD PANEL UNIT is replaced, be sure to reset the
operating time following the above method.
• Cannot reset Toytal operating time.
1-8 (No.YA702<Rev.005>)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1FEATURES
Clear SD
LCD picture is unstable due to a large number of signal noise.
Such noise appears extensively especially when an LCD
displays SD signals. Clear SD mode resolves disadvantage for
better picture quality.
ANALOG PWBSFU-1603A-H2SFU-1605A-CKSFU-1601A-H2SFU-1601A-H2SFU-1604A-H6
Eng, Chi, Spa, Por,
Rus
Eng, Chi, Rus, Ara,
Fre, Thai, Viet, Ukr,
Spa, Mal
Eng, Chi, Rus, Ara,
Fre, Thai, Viet, Ukr,
Spa, Mal
(No.YA702<Rev.005>)1-9
Eng, Chi, Rus, Ara,
Fre, Thai, Viet, Ukr,
Spa, Mal
ItemLT-32EX19/ATLT-32EX19/BTDescription
LCD PANEL UNIT QLD0566-001QLD0620-001No compatible
DIGITAL PWBSFU0D601A-H2SFU0D604A-H2No compatible
POWER PWBSFU-9601A-H2SFU-9607A-H2No compatible
ItemLT-32EX19/MATLT-32EX19/MBTDescription
LCD PANEL UNIT QLD0566-001QLD0620-001No compatible
DIGITAL PWBSFU0D608A-H2SFU0D605A-H2No compatible
POWER PWBSFU-9601A-H2SFU-9607A-H2No compatible
ItemLT-32EX19/PATLT-32EX19/PBTDescription
LCD PANEL UNIT QLD0566-001QLD0620-001No compatible
DIGITAL PWBSFU0D609A-H2SFU0D606A-H2No compatible
POWER PWBSFU-9601A-H2SFU-9607A-H2No compatible
ItemLT-32EX19/SATLT-32EX19/SBTDescription
LCD PANEL UNIT QLD0566-001QLD0620-001No compatible
DIGITAL PWBSFU0D610A-H2SFU0D611A-H2No compatible
POWER PWBSFU-9601A-H2SFU-9607A-H2No compatible
2.3 HOW TO IDENTIFY MODELS
Distinguish name is added at the bottom of the rating label.
MODEL No.
MODEL No.
LT-32EX19
LT-32EX19AT
LT-32EX19SAT
LT-32EX19BT
LT-32EX19SBT
LT-32EX19
LT-32EX19
LT-32EX19PAT
LT-32EX19PBT
LT-32EX19BBT
LT-32EX29
LT-32EX19
LT-32EX19MAT
LT-32EX19MBT
32EX19-NBSK
32EX19-RBCK
LT-32EX19EBT
1-10 (No.YA702<Rev.005>)
32EX29-VBSK
32EX29-NBSK
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.
Item
QLD0566-001QLD0620-001
Specifications
Maximum dimensions ( W × H × D ) 76.0 cm × 45.0 cm × 4.5 cm76.0 cm × 45.0 cm × 4.8 cm
Weight6.5 kg5.7 kg
Screen sizeDiagonal : 80.0 cm (H: 69.7 cm × V:39.2 cm)
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: 0.17025 mm
Displayed colour16777216 colours 256 colours for R G and B
Panel interface systemLVDS (Low Voltage Differential Signaling)
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.YA702<Rev.005>)1-11
2.4.2 MAIN CPU PIN FUNCTION [IC7001
PinPin name I/O Function
1 SDVDD- 3.3V power supply
2 VDD33BIAS- 3.3V power supply
3 REFRINI Bias setting for LVDS
4 VSS33GIAS- GND
5 OTXOUT4P- Not used
6 OTXOUT4M- Not used
7 OTXOUT3P- Not used
8 OTXOUT3M- Not used
9 OTXCLKOUTP- Not used
10 OTXCLKOUTM- Not used
11 VDD33LVDS- 3.3V power supply
12 OTXOUT2P- Not used
13 OTXOUT2M- Not used
14 VSS33LVDS- GND
15 OTXOUT1P- Not used
16 OTXOUT1M- Not used
17 OTXOUT0P- Not used
18 OTXOUT0M- Not used
19 LPF2I LPF setting for PLL
20 PLLAVDD- 3.3V power supply
21 VCCQ33- 3.3V power supply
22 VCCQ10- 1.05V power supply
23 VCCQ10- 1.05V power supply
24 SXINI 36.864MHz oscillation for sampling clock
25 SXOUTO 36.864MHz oscillation for sampling clock
26 GPIO13/CSIO0_TXD/
UART0_TXD/MSQ
27 GPIO14/CSIO0_RXD/
UART0_RXD/MSD
28 GPIO15/CSIO0_SCLK/
MST
29 GPIO16/CSIO0_RTS/
UART0_RTS/MSN
30 GPIO17/CSIO0_CTS/
UART0_CTS
31 GPIO20/CSIO1_TXD/
UART1_TXED
32 I2SMCLKO Master clock for I2S BUS
33 I2SSD1I/O Data for I2S bus
34 VCCQ33- 3.3V power supply
35 I2SWS1O Word select for I2S bus
36 I2SSCLK1O Clock for I2S bus
37 GPIO21/CSIO1_RXD/
UART1_RXD
38 GPIO22/CSIO1_SCLK/
SODIF
39 SDVDD- 3.3V power supply
40 VCCQ10- 1.05V power supply
41 VCCQ10- 1.05V power supply
42 VBUSUSB- Not used
43 R_OUT1O Audio out R for Monitor
44 SDAVSS1- GND
45 VCOM1_DACO Reference voltage setting
46 SDAVDD1- 3.3V power supply
47 L_OUT1O Audio out L for Monitor
48 VCCQ33- 3.3V power supply
49 R_OUT2O Audio out R for Main
50 SDAVSS2- GND
51 VCOM2_DACO Reference voltage setting
52 SDAVDD2- 3.3V power supply
53 L_OUT2- Audio out L for Main
54 SDVDD- 3.3V power supply
55 DGND- GND
56 SMUX_AVDD33O 3.3V power supply
O Reset for HDMI-2 [Reset=L]
O Power LED(blue lighting [ON=H]
- Not used
- Not used
O Power on/off control main power [ON=L]
O Power on/off control PFC [ON=L]
Power on/off control for low bias line [ON= L]
O
O Reset for HDMI-1 [Reset=L]
: DIGITAL PWB]
PinPin name I/O Function
57 SMUX_AVSS- GND
58 VREF1I Reference voltage setting
59 VREF2I Reference voltage setting
60 SIFI SIF for VHF/UHF tuner
61 SADC_AVDD33- 3.3V power supply
62 SADC_AVSS- GND
63 R_IN/I2SWS3I Audio input R
64 DMY/I2SSCK3- Not used
65 SADC_AVSS- GND
66 SADC_AVDD33- 3.3V power supply
67 VCOM_SOUNDADCI Reference voltage setting
68 SADC_AVDD33- 3.3V power supply
69 SADC_AVSS- GND
70 L_IN/I2SSD3I Audio input L
71 SADC_AVSS- GND
72 SADC_AVDD33- 3.3V power supply
73 VCCQ10- 1.05V power supply
74 VCCQ33- 3.3V power supply
75 DFPUSB- Not Used
76 DFMUSB- Not Used
77 VCCQ10- 1.05V power supply
78 VCCQ10- 1.05V power supply
79 VCCQ10- 1.05V power supply
80 AVDDPLL- 3.3V power supply
81 PLLXFCAI Filter setting for HDMI
82 AVSSPLL- GND
83 PLLXFCPI Filter setting for HDMI
84 AVSSPLL- GND
85 PLLXFCXI Filter setting for HDMI
86 AVSSPLL- GND
87 PWRI Power status detect for HDMI
88 HDMISCLI Clock for I2C bus (for HDMI)
89 HDMISCAI/O Data for I2C bus (for HDMI)
90 VSSE- GND
91 VDDE- 3.3V power supply
92 AVDDHDMI- 3.3V power supply
93 RXCNI TMDS clock for HDMI
94 RXCPI TMDS clock for HDMI
95 AVSSHDMI- GND
96 RX0NI TMDS data for HDMI
97 RX0PI TMDS data for HDMI
98 AVDDHDMI- 3.3V power supply
99 AVSSHDMI- GND
100 RX1NI TMDS data for HDMI
101 RX1PI TMDS data for HDMI
102 AVDDHDMI- 3.3V power supply
103 RX2NI TMDS data for HDMI
104 RX2PI TMDS data for HDMI
105 AVSSHDMI- GND
106 EXTRESI For external resister
107 PVDD- 3.3V power supply
108 PVSS- GND
109 DGND- GND
110 VCCQ10- 1.05V power supply
111 SDVDD- 3.3V power supply
112 VDDQ- GND
113 XOUTO 27MHz oscillation for CPU system clock
114 XINI 27MHz oscillation for CPU system clock
115 VCCQ10- 1.05V power supply
116 VCCQ33- 3.3V power supply
117 MPSELI Mode select for external operation [Exter-
nal=L]
118 SDOO Data for external flash memory
1-12 (No.YA702<Rev.005>)
PinPin name I/O Function
119 SDII Data for external flash memory
120 CSO Chip select for external flash memory
121 RESETI CPU reset [Reset=L]
122 VCCQ10- 1.05V power supply
123 SCKO Clock for external flash memory
124 GOIO23/CSIO1_RTS/
UART1_RTS/
UART3_TXD
125 GOIO24/CSIO1_CTS/
UART1_CTS/
UART3_RXD
126 SDITDOO Data for external flash memory
127 SDITDII Data for external flash memory
128 SDITCKI Clock for external flash memory
129 VCCQ10- 1.05V power supply
130 SDVDD- 3.3V power supply
131 VCCQ33- 3.3V power supply
132 SDITRSTI Reset for external flash memory
133 SDITMSI Mode select for external flash memory
134 GPIO00/MFT0A/MFT1B/
PWD0
135 GPIO01/MFT1A/MFT0B/
PWD1
136 GPIO02/MFT2A/MFT7B/
UART2_TXD
137 GPIO03/MFT3A/MFT2B/
UART2_RXD
138 GPIO04/MFT4A/MFT3B/
CSIO2_TXD
139 GPIO05/MFT5A/MFT4B/
CSIO2_RXD
140 GPIO06/MFT6A/MFT5B/
CSIO2_SCLK
141 GPIO07/SCL0O Clock for I2C bus (EEPROM)
142 GPIO10/_SDA0I/O Data for I2C bus (EEPROM)
143 VCCQ10- 1.05V power supply
144 GPIO11/SCL1O Clock for I2C bus (fro tuner/audio/HDMI)
145 GPIO12/SDA1I/O Data for I2C bus (fro tuner/audio/HDMI)
146 HDIN(PC)I H sync for PC
147 VDIN(PC)I V sync for PC
148 VCCQ33- 3.3V power supply
149 PLLSAVDD- 3.3V power supply
150 SDVDD- 3.3V power supply
151 PLLDVDD- 3.3V power supply
152 PLLMAVDD- 3.3V power supply
153 ADIN4/INPUT04/
CSIO_CTS/UART0_CTS
154 ADIN3/INPUT03I Key scan for side control (Input/Vol+/Vol-)
155 ADIN2/INPUT02/INT2I Key scan for side control (Power/ CH+/
156 ADIN1/INPUT01/INT1- Not used
157 ADIN0/INPUT00/INT0I Power abnormality detection [Emer-
158 MAVDD- 3.3V power supply
159 SSIN1I Y sync input
160 SSIN2- Not used
161 VINFB- Not used
162 DGND- GND
163 ADCVDDA18- 1.8V power supply
164 VIN1AI PC G for input-PC
165 ADCVSSA- GND
166 VIN2AI Y for input-1
167 ADCVDDA18- 1.8V power supply
168 VVIN3A- Not used
169 ADCVSSA- GND
170 VREFAI Reference voltage setting
171 ADCVDDA33- 3.3V power supply
- Not used
- Not used
O DC dimming control for back-light inverter
PWM dimming control for back-light inverter
O
O
Power on/off control for back-light [60Hz=H]
I Headphone detect [Detect=H]
O Power on/off control for LCD [ON=L]
I Remote control sensor input
O Rest for HDMI-3
I AFT voltage for VHF/UHF tuner
CH-/Menu)
gent=H]
PinPin name I/O Function
172 AVSSSL- GND
173 AVDDSL- 3.3V power supply
174 ADCVDDMX33- 3.3V power supply
175 ADCVDDMX18- 1.8V power supply
176 REXTI For external resistor
177 VRPI Reference voltage setting
178 VRMI Reference voltage setting
179 ADCVSSMX- GND
180 ADCVDDB18- 1.8V power supply
181 VIN1BI PC B for input-PC
182 ADCVSSB- GND
183 VIN2BI Pb for input-1
184 ADCVDDB18- 1.8V power supply
185 VIN3B- Not used
186 ADCVSSB- GND
187 VREFBI Reference voltage setting
188 ADCVDDB33- 3.3V power supply
189 ADCVDDC18- 1.8V power supply
190 VIN1CI PC R for input-PC
191 ADCVSSC- GND
192 VIN2CI Pr for input-1
193 ADCVDDC18- 1.8V power supply
194 VREFCI Reference voltage setting
195 ADCVSSC- GND
196 ADCVDDC33- 3.3V power supply
197 PLL1VDD33A- 3.3V power supply
198 LPF1I LPF setting for PLL
199 PLL1VSS33A- GND
200 PLL1VDDD- 3.3V power supply
201 PLL1VSSD- GND
202 VCCQ10- 1.05V power supply
203 ETXOUT4P- Not used
204 ETXOUT4M- Not used
205 ETXOUT3PO LVDS data for LCD panel
206 ETXOUT3MO LVDS data for LCD panel
207 ETXCLKOUTPO LVDS data for LCD panel
208 ETXCLKOUTMO LVDS data for LCD panel
209 VDD33LVDS- 3.3V power supply
210 ETXOUT2PO LVDS data for LCD panel
211 ETXOUT2MO LVDS data for LCD panel
212 VSS33LVDS- GND
213 ETXOUT1PO LVDS data for LCD panel
214 ETXOUT1MO LVDS data for LCD panel
215 ETXOUT0PO LVDS data for LCD panel
216 ETXOUT0MO LVDS data for LCD panel
(No.YA702<Rev.005>)1-13
SECTION 3
DISASSEMBLY
3.1CAUTION AT DISASSEMBLY
• Make sure that the power cord is disconnected from the outlet.
• Pay special attention not to break or damage the parts.
• Make sure that there is no bent or stain on the connectors before inserting, and firmly insert the connectors.
• Be sure to reattach the wire clamps removed during the procedure to the original positions. (Attaching the wire clamps in wrong
positions may affect the performance.)
REFERENCE:
When removing each board, remove the connector if necessary. The operation is easier if you write down the connection points
(connector numbers) of the connector. For connection of each board, refer to the "WIRING DIAGRAM" of the Standard Circuit
Diagram.
3.2DISASSEMBLY PROCEDURE (MAIN UNIT)
3.2.1 REMOVING THE REAR COVER (Fig.3-1)
(1) Remove the 1 screw [A].
(2) Remove the POWER CORD COVER.
(3) Remove the POWER CORD.
(4) Remove the 2 screws [B], 16 screws [C] and 3 screws [D].
(5) Remove the REAR COVER.
3.2.2 REMOVING THE POWER PWB (Fig.3-1)
• Remove the REAR COVER.
• Remove the POWER CORD.
(1) Remove the 6 screws [E].
(2) Remove the POWER PWB.
3.2.3 REMOVING THE CHOKE COIL (Fig.3-1)
• Remove the REAR COVER.
(1) Remove the 2 screws [F].
(2) Remove the CHOKE COIL.
3.2.8 REMOVING THE SPEAKER (Fig.3-1)
• Remove the REAR COVER.
(1) Remove the SPEKAER.
3.2.9 REMOVING THE STAND (Fig.3-1)
(1) Remove the 4 screws [L].
(2) Remove the STAND.
3.2.10 REMOVING THE LED PWB (Fig.3-1)
• Remove the REAR COVER.
• Remove the STAND.
(1) Remove the 6 screws [M], 2 screws [N] and 3 screws [P].
(2) Remove the MAIN BASE.
(3) Remove the 2 screws [Q] and 2 screws [R].
(4) Remove the BOTTOM FRAME.
(5) Remove the 2 screws [S].
(6) Remove the LED PWB.
3.2.4 REMOVING THE ANALOG PWB (Fig.3-1)
• Remove the REAR COVER.
(1) Remove the 3 screws [G].
(2) Remove the ANALOG PWB.
3.2.5 REMOVING THE DIGITAL PWB (Fig.3-1)
• Remove the REAR COVER.
(1) Remove the 1 screw [H].
(2) Remove the TERMINAL COVER.
(3) Remove the 4 screws [J].
(4) Remove the DIGITAL PWB.
3.2.6 REMOVING THE SW PWB (Fig.3-1)
• Remove the REAR COVER.
(1) Remove the 2 hooks [a].
(2) Remove the CONTROL KNOB with SW PWB.
(3) Remove the SW PWB from the CONTROL KNOB.
3.2.7 REMOVING THE REMOTE PWB (Fig.3-1)
• Remove the REAR COVER.
(1) Remove the 1 screw [K].
(2) Remove the REMOTE PWB.
3.2.11 REMOVING THE LCD PANEL UNIT (Fig.3-1)
• Remove the REAR COVER.
• Remove the STAND.
• Remove the MAIN BASE.
• Remove the BOTTOM FRAME.
(1) Remove the 1 screw [K].
(2) Remove the REMOTE PWB and LCD SUPPORT
BRACKET(R).
(3) Remove the 1 screw [T].
(4) Remove the LCD SUPPORT BRACKET(L).
(5) Remove the 3 screws [U].
(6) Remove the TOP FRAME.
(7) Remove the LCD PANEL UNIT from the FRONT PANEL.
1-14 (No.YA702<Rev.005>)
POWER CORD
CC
AA
POWER CORD
COVER
BB
DD
REAR COVER
POWER PWB
CHOKE COIL
[LT-32EX19/NBSK]
[LT-32EX29/NBSK]
HH
TERMINAL
BASE
PP
NN
LCD PANEL UNIT
JJ
GG
ANALOG PWB
DIGITAL PWB
LL
NN
EE
MAIN BASE
MM
STAND
QQ
FF
RR
BOTTOM FRAME
SW PWB
aa
TOP FRAME
UU
CONTROL KNOB
LCD SUPPORT BRACKET
TT
LCD SUPPORT BRACKET
SS
LED PWB
REMOTE PWB
SPEAKER
KK
FRONT
SPEAKER
Fig.3-1
(No.YA702<Rev.005>)1-15
3.3DISASSEMBLY PROCEDURE (LCD PANEL UNIT [QLD0566-001])
3.3.1 REMOVING THE CONTROL PWB (Fig.3-2)
• Remove the REAR COVER.
• Remove the STAND.
• Remove the MAIN BASE.
(1) Remove the 4 screws [A].
3.3.2 REMOVING THE INVERTER PWB (Fig.3-2)
• Remove the REAR COVER.
(1) Remove the 6 screws [B].
(2) Remove the INVERTER PWB COVER.
(3) Remove the INVERTER PWB.
(2) Remove the CONTROL PWB COVER.
(3) Remove the CONTROL PWB.
B
FRONT
LCD PANEL UNIT
A
LCD CONTROL PWB
INVERTER PWB
Fig.3-2
1-16 (No.YA702<Rev.005>)
3.4 DISASSEMBLY PROCEDURE (LCD PANEL UNIT [QLD0620-001])
3.4.1 REMOVING THE LCD CONTROL PWB (Fig.3-3)
• Remove the REAR COVER.
• Remove the STAND.
• Remove the MAIN BASE.
(1) Remove the 2 screws [A].
(2) Remove the LCD CONTROL PWB COVER.
(3) Remove the LCD CONTROL PWB.
3.4.2 REMOVING THE INVERTER PWB (Fig.3-3)
• Remove the REAR COVER.
• Remove the STAND.
• Remove the MAIN BASE.
(1) Remove the 3 screws [B].
(2) Remove the INVERTER PWB COVER.
(3) Remove the INVERTER PWB.
3.4.3 REMOVING THE BACK LIGHT UNIT (Fig.3-3)
• Remove the REAR COVER.
• Remove the LCD PANEL UNIT.
(1) Remove the 4 screws [C].
(2) Remove the PANEL FRAME.
(3) Remove the LCD PANEL from the BACK LIGHT UNIT.
CONTROL PWB
LCD CONTROL PWB
A
COVER
B
INVERTER PWB
COVER
LCD PANEL UNIT
INVERTER PWB
C
PANEL FRAME
LCD PANEL
BACK LIGHT UNIT
Fig.3-3
(No.YA702<Rev.005>)1-17
3.5 MEMORY IC REPLACEMENT
• 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.
3.5.1 MEMORY IC TABLE
Symbol Number of pins Mounting PWBMain content of data
IC7002
IC7003
8-pinDIGITAL PWBSetting value of IC7001 (MAIN CPU) is memorized.
8-pinDIGITAL PWBProgramming data of IC7001 (MAIN CPU) is memorized.
3.5.2 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. SERVICE MODE SETTING [SYSTEM CONSTANT SETTING]
(1) Press the [DISPLAY] key and [MUTING] key
simultaneously, then enter the SERVICE MODE.
(2) Press the [8] key, then enter the SYSTEM CONSTANT
SET SCREEN.
(3) Check the setting values of the SYSTEM CONSTANT
SET. If the value is different, set the correct value with
the [FUNCTION /] key.
5. RECEIVING CHANNEL SETTING
Refer to the OPERATING INSTRUCTIONS and set the
receive channels (Channels Preset) as described.
6. 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.
7. SERVICE MODE SETTING [ADJUST MODE SETTING]
Verify what to set in the SERVICE MODE, and set whatever is
necessary (Fig.3-4). Refer to the SERVICE ADJUSTMENT for
setting.
Setting modeIitem No.Setting items
1.ADJUST
S001R DRIVE MID
S002G DRIVE MID
S003B DRIVE MID
S004R DRIVE COOL
S005G DRIVE COOL
S006B DRIVE COOL
S007R DRIVE WARM
S008G DRIVE WARM
S009B DRIVE WARM
SERVICE MODE SCREEN
SERVICE MODE SCREEN
SERVICE MENU Ver.xxx
1. ADJUST
2. SELF CHECK
3. I2C STOP
ADJUST MODE SCREEN
S001 R DRIVE MID 128
PAL FULL STD M
Press [8] key
SYSTEM CONSTANT SCREEN
Press [1] key
System Constant
1. For Saudi Arabia : xxx
2. Area Menu : xxx
3. Area : xxx
4. For Argentina : xxx
5. For Philippines : xxx
6. Language Number : xxx
7. Clear SD : xxx
Version
Model=FU2 LT-22EX19
Soft=x.xx, E2PROM =xxxx
Trans ver=x.xx
Para ver=xxxxxx
Date=xxxxxxx
Fig.3-4
* Input PAL White Raster signal 75% ( Y = 525 mV and SYNC
(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.
3.6.2 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.
3.6.3 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.
A
B
C
(4) Then solder leads B and C.
A
B
C
(No.YA702<Rev.005>)1-23
SECTION 4
ADJUSTMENT
4.1ADJUSTMENT PREPARATION
(1) This TV is adjusted by using REMOTE CONTROL UNIT.
(2) The adjustment using the REMOTE CONTROL UNIT is made on the basic 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.
4.2 PRESET SETTING BEFORE ADJUSTMENTS
Unless otherwise specified in the adjustment items, preset the
following functions with the REMOTE CONTROL UNIT.
4.3MEASURING INSTRUMENT AND FIXTURES
• Signal generator (Pattern generator)[PAL]
• Remote control unit
4.4BASIC OPERATION OF SERVICE MODE
4.4.1 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.
4.4.2 HOW TO EXIT THE SERVICE MODE
Press the [MENU] key to exit the Service mode.
SERVICE MODE SCREEN
SERVICE MENU Ver.XXX
1. ADJUST
2. SELF CHECK
3. I2C STOP
Refer to SECTION5
NOT USED
Setting itemSettings position
Picture ModeStandard
PICTURE adjustmentsCentre
White BalanceMid
4.4.4 SERVICE MODE SELECT KEY LOCATION
MUTING
FUNCTION
/
4.4.3 CHANGE AND MEMORY OF SETTING VALUE
SELECTION OF SETTING ITEM
• [[FUNCTION /] key.
For scrolling up / down the setting items.
CHANGE OF SETTING VALUE (DATA)
• [[FUNCTION /] key.
For scrolling up / down the setting values.
MEMORY OF SETTING VALUE (DATA)
The setting value will be stored automatically when release the
REMOTE CONTROL UNIT keys.
1-24 (No.YA702<Rev.005>)
DISPLAY
FUNCTION
/
4.4.5 ADJUSTMENT MODE
This mode is used to adjust the VIDEO CIRCUIT.
4.4.5.1HOW TO ENTER THE ADJUSTMENT MODE
When the SERVICE MENU SCREEN of SERVICE MODE is
displayed, press [1] key to enter the ADJUSTMENT MODE.
NOTE:
• 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
When the SERVICE MENU SCREEN of SERVICE MODE is
displayed, press [6] key to enter the VSM PRESET MODE.
4.4.6.2DESCRIPTION OF STATUS DISPLAY
SERVICE MODE SCREEN
SERVICE MENU Ver.XXX
1. ADJUST
2. SELF CHECK
3. I2C STOP
Press [6] key
VSM PRESET MODE SCREEN
VSM PRESET
Back Light Soft XX
Contrast Soft XX
Bright Soft XX
Sharp Soft XX
Colour Soft XX
Tint Soft XX
Back Light Bright XX
Contrast Bright XX
Bright Bright XX
Sharp Bright XX
Colour Bright XX
Tint Bright XX
Back Light Standard XX
Contrast Standard XX
Bright Standard XX
Sharp Standard XX
Colour Standard XX
Tint Standard XX
Back Light Game mode XX
Contrast Game mode XX
Bright Game mode XX
Sharp Game mode XX
Colour Game mode XX
Tint Game mode XX
(1) SETTING ITEM NAME
Setting item name are displayed.
(2) PICTURE MODE
The picture mode name are dispalayed.
(3) SETTING VALUE (DATA)
The setting values are displayed. The setting value to be
displayed are listed below.
SoftBrightStandard
Game mode
Back Light16322416
Contrast16181616
Bright16161616
Sharp 16201616
Colour16161616
Tint16161616
(1)SETTING ITEM
(2)PICTURE MODE
(3)
SETTING VALUE (DATA)
4.5 INITIAL 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.
Note: " ∗ " Adjustable range is -256 ~ 00 only and one colour(R
or G or B) should be "00"
S009B DRIVE WARM0000 - 0255-120
Note: " ∗ " Adjustable range is -256 ~ 00 only and one colour(R
or G or B) should be "00"
1-26 (No.YA702<Rev.005>)
4.6ADJUSTMENT PROCEDURE
4.6.1 VIDEO CIRCUIT
Item
WHITE BALANCE
(HIGH LIGHT)
VSM PRESETRemote
Measuring
instrument
Remote
control unit
Signal
generator
control unit
Adjustment partDescription
[1.ADJUST]
S001: R DRIVE MID
S002: G DRIVE MID
S003: B DRIVE MID
[VSM PRESET]
Back Light
Contrast
Bright
Sharp
Colour
Tint
(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) Adjustment is select item from <S001>(R DRIVE
MID), <S002>(G DRIVE MID), <S003>(B
DRIVE MID).
(7) Select <S001> item fix to 128 Other color
<S002>, <S003> should be less than 128.
NOTE:
Adjusttable range is 0000-0128 only (Don't
over "0128").
(8) Must check white balance adjustment correctry
with low light to high light.
(1) Select "VSM PRESET" from the SERVICE
MODE.
(2) Set the initilal setting value of <Back Light> -
<Tint>.
(No.YA702<Rev.005>)1-27
SECTION 5
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
the various control lines connected to the main microcomputer.
5.1.2 HOW TO ENTER THE SELF CHECK MODE
(1) Press the [DISPLAY] key and [MUTING] key
simultaneously, then enter the SERVICE MODE.
(2) Press the [2] key then enter the SELF CHECK MODE.
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.
2
C bus and
SERVICE MODE SCREEN
Diagnosis
OK:Normal
NG:Abnormal
SELF CHECK MODE SCREEN
SERVICE MENU Ver.xxx
1. ADJUST
2. SELF CHECK
3. I2C STOP
NOT USED
Press [2] key
Failure history
LOB 9 AV SW
MEM 0 MEI 3
TUN 0 HDM 3
SYN NG SMD 3
CMD 0 HDMI SW 0
SCL2:H SDA2:H SMD RST0000
TIME 685536
TOTAL 1371072 MAX
Refer to SECTION1
Fig.5-1
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 diagnosed as "Abnormal" and counted.
(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.
Therefore, turn on the main power, and then wait for about 3
seconds before starting Self check.
If recurrences are expected, ensure to clear (reset) the failure
history and record the new diagnosis results.
1-28 (No.YA702<Rev.005>)
5.1.6 DETAILS
Self check is performed for the following items:
ItemOSDContentCondition to detect
LOB protectLOBLOB protect detectedStart to detect 3sec after LOB is turned on.
Power off if it is being NG for 200ms.
Count is 0-9
2
EEPROM MEMORYMENTotal count of I
C error of EEPROMStart to detect 3sec after LOB is turned on.
Count NG of acquisition I
2
C or NACK.
Count is 0-9
2
Sound MeisterMEITotal count of I
C error of Eala IC.Start to detect 3sec after LOB is turned on.
2
Count NG of acquisition I
C or NACK.
Count is 0-9
2
RF TunerTUNTotal count of I
C error of RF TunerStart to detect 3sec after LOB is turned on.
2
Count NG of acquisition I
C or NACK.
Count is 0-9
2
HDMIHDMTotal count of I
C error of HDMIStart to detect 3sec after LOB is turned on.
Count NG of acquisition I
2
C or NACK.
Count is 0-9
SynchronousSYNWhether there is Synchronous signal or not? It displays it to the input selecte signal.
The display is OK or NG.
Lamp using timeTIMEDisplay of panel drive timeWhen LOB is turned It will be displayed in every
one hour. (Refer to Secton 1)
Clear motion driveCMD-Not used.
2
AV SWAV SWTotal count of I
C error of AV SWStart to detect 3sec after LOB is turned on.
2
Count NG of acquisition I
C or NACK.
Count is 0-9
2
HDMI SWHDMI SW Total count of I
C error of HDMI SWStart to detect 3sec after LOB is turned on.
Count NG of acquisition I
2
C or NACK.
Count is 0-9
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 protectionPower LED turnig on and off at 1 second intervals.
< Explanation of operation >
If error is detected, the power is turned off. Shortly after the power is turned off, POWER LED will be blinked.
When the protection of low bias line short operates, the power cannot be turned on until the power cord takes out and inserts, after
the power is turned off.
(No.YA702<Rev.005>)1-29
Victor Company of Japan, Limited
Display Division 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan
(No.YA702<Rev.005>)
Printed in Japan
VSE
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