JVC LT-37DR1BJ, LT-37DR1BU Schematic

SERVICE MANUAL
INTEGRATED DIGITAL TERRESTRIAL LCD TELEVISION
YA688<Rev.001>20094SERVICE MANUAL
LT-37DR1BJ/PP, LT-37DR1BU/PP
BASIC CHASSIS
FY2
COPYRIGHT © 2009 Victor Company of Japan, Limited
No.YA687: LT-32DR1BJ, LT-32DR1BU No.YA688: LT-37DR1BJ, LT-37DR1BU No.YA689: LT-42DR1BJ, LT-42DR1BU
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
COPYRIGHT © 2009 Victor Company of Japan, Limited
No.YA688<Rev.001>
2009/4
SPECIFICATION
Items
Dimensions ( W × H × D ) 90.8 cm × 63.6 cm × 27.9 cm [Included stand]
90.8 cm × 58.7 cm × 10.9 cm [TV only]
Mass 17.8 kg [Included stand]
16.5 kg [TV only]
Power Input AC220V - AC240 V, 50 Hz
Power Consumption 129 W (Standby: 0.5 W)
TV RF System Analog CCIR (B/G, I, D/K, L)
Digital DVB-T 7 MHz / 8 MHz
Colour System PAL
SECAM NTSC 3.58/4.43 [EXT only]
Stereo System NICAM (B/G, I, D/K, L), A2 (B/G, D/K)
Receiving Frequency Analog VHF: 47MHz - 470MHz
UHF: 470 MHz - 862 MHz CATV: 116MHz - 172MHz / 220MHz - 469MHz
174-230 MHz / 470-862 MHz
Digital
Intermediate Frequency
Colour Sub Carrier Frequency
Teletext System Analog FLOF (Fastext level 2.5)
LCD panel 37V-inch wide aspect (16 : 9)
Screen Size Diagonal: 94 cm (H: 81.9 cm × V: 46.0 cm) Display Pixels Horizontally 1920 × Vertically 1080 × RGB <W-UXGA> 6220800 dots in total
Audio Power Output 10 W + 10 W
Speaker 4.0 cm × 16.0 cm, oval type × 2 (Oblique Cone) Aerial terminal (VHF/UHF) 75 unbalanced, coaxial EXT-1 / EXT-2 (Input / Output) 21-pin Euro connector (SCART socket ) × 2
EXT-3 (Input) Component Video
750p / 1125i
525i / 525p / 625i / 625p
EXT-4 / EXT-5 / EXT-6 (HDMI Input)
Supported format (Video) 525i/525p/625i/625p/750p(50/60)/1125i(50/60)/1125p(24/50/60)
Supported format (Audio) PCM 2ch
Digital Audio Optical Output Digital SPDIF × 1 USB Input (Photo Viewer ) USB connector (Series A) × 1 Headphone 3.5 mm stereo mini jack × 1 Remote Control Unit RM-C2501 (AAA/R03 dry cell battery × 2)
Design & specifications are subject to change without notice.
VIF 38.9MHz (B/G, I, D/K, L)
SIF 33.4MHz (5.5MHz :B/G)
32.9MHz (6.0MHz :I)
32.4MHz (6.5MHz :D/K)
PAL 4.43MHz
SECAM 4.40625MHz / 4.25MHz
NTSC 3.58MHz / 4.43MHz
TOP WST(World Standard system)
Digital EBU TEXT MHEG 5 UK profile
RCA pin jack × 3 Y : 1 V (p-p) (Sync signal: ±0.35V(p-p), 3-value sync.), 75 Pb/Pr : ±0.35V(p-p), 75 Y : 1 V (p-p), Positive (Negative sync.), 75 Cb/Cr : 0.7V(p-p), 75
Audio 500 mV (rms), High impedance, RCA pin jack × 2
HDMI 2-row 19pin connector × 3
(Digital-input terminal is not compatible with picture signals of personal computer)
LT-37DR1BU LT-37DR1BJ
Contents
1-2 (No.YA688<Rev.001>)
SECTION 1
PRECAUTION
1.1 SAFETY PRECAUTIONS [EXCEPT FOR UK]
(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 1000 per volt or more sensitivity in the following manner. Connect a 1500 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)
0.15 F AC-TYPE
GOOD EARTH GROUND
1500 10W
PLACE THIS PROBE ON EACH EXPOSED ME TAL PAR T
(No.YA688<Rev.001>)1-3
1.2 SAFETY PRECAUTIONS [FOR UK]
(1) The design of this product contains special hardware and 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 product 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 product have special safety-related characteristics. These characteristics are often
not evident from visual inspection nor can the protection afforded by them necessary 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 the 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) The leads in the products are routed and dressed with ties, clamps, tubing’s, barriers and the like to be separated from live parts,
high temperature parts, moving parts and / or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.
WARNING
(1) The equipment has been designed and manufactured to meet international safety standards. (2) It is the legal responsibility of the repairer to ensure that these safety standards are maintained. (3) Repairs must be made in accordance with the relevant safety standards. (4) It is essential that safety critical components are replaced by approved parts. (5) If mains voltage selector is provided, check setting for local voltage.
1.3 INSTALLATION
1.3.1 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.
1.3.2 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.
200 mm
50 mm150 mm 150 mm 50 mm
*Diagram differs from actual appearance.
1-4 (No.YA688<Rev.001>)
1.3.3 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.
Hole
Belt and screw (not provided)
*Diagram differs from actual appearance.
1.3.4 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.
1.4 HANDLING LCD PANEL
1.4.1 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) 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.
1.4.3 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).
1.4.2 OPTICAL FILTER (ON THE FRONT OF THE LCD PANEL)
(No.YA688<Rev.001>)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 FEATURES
DIGITAL TUNER
This TV can receive both DVB-T (Digital terrestrial broadcasting) and Analogue terrestrial broadcasting.
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.
2.2 MAIN DIFFERENCE LIST
Item LT-37DR1BJ LT-37DR1BU
POWER CORD UK Type (3-Pins) EU Type (2-Pins)
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.
1-6 (No.YA688<Rev.001>)
2.3 21-PIN EURO CONNECTOR (SCART) : EXT-1 / EXT-2
Pin No. Signal designation Matching value EXT-1 EXT-2
1 AUDIO R output 500mV(rms) (Nominal), Low impedance Used (TV OUT) Used (LINE OUT) 2 AUDIO R input 500mV(rms) (Nominal), High impedance Used (R1) Used (R2) 3 AUDIO L output 500mV(rms) (Nominal), Low impedance Used (TV OUT) Used (LINE OUT) 4 AUDIO GND Used Used 5 GND (B) Used Used 6 AUDIO L input 500mV(rms) (Nominal), High impedance Used (L1) Used (L2) 7 B input 700mV 8 FUNCTION SW
(SLOW SW)
Low : 0V-3V High : 8V-12V, High impedance
, 75 Used Not used
(B-W)
Used Used
9 GND (G) Used Used 10 SCL / T-V LINK Not used Not used 11 G input 700mV
, 75 Used Not used
(B-W)
12 SDA Not used Not used 13 GND (R) Used Used 14 GND (YS) Used Not used 15 R / C input R : 700mV
C : 300mV
(B-W) (P-P)
, 75
, 75
Used (C1/R) Used (C2)
16 Ys input (FAST SW) Low : 0V-0.4V, High : 1V-3V, 75 Used Not used
17 GND (VIDEO output) Used Used 18 GND (VIDEO input) Used Used 19 VIDEO output 1V 20 VIDEO / Y input 1V
(Negative sync), 75 Used (TV OUT) Used (LINE OUT)
(P-P)
(Negative sync), 75 Used (Y1/V) Used (Y2/V)
(P-P)
21 COMMON GND Used Used
(P-P= Peak to Peak, B-W= Blanking to white peak)
[Pin assignment]
20 18 16 14 12 10 8 6 4 2
21 19 17 15 13 11 9 7 5 3 1
(No.YA688<Rev.001>)1-7
2.4 TECHNICAL 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.
2.4.1.1 SPECIFICATIONS
The following table shows the specifications of this unit.
Item Specifications
Maximum dimensions ( W × H × D ) 87.7 cm × 51.68 cm × 5.53 cm
Weight 10.0 kg
Screen size Diagonal: 94 cm (H: 81.9 cm × V: 46.0 cm)
Aspect ratio 16 : 9
Drive device / system a-Si-TFT active matrix system
Resolution Horizontally 1920 × Vertically 1080 × RGB <W-UXGA> 6220800 dots in total
Pixel pitch (pixel size) Horizontally: 0.42675 mm, Vertically: 0.42675 mm
Displayed colour 16777216 colours 256 colours for R G and B
Brightness 500 cd/m
2
Contrast ratio 2500 : 1
Response time (Gray toGray) 6.5 ms
View angle (Horizontally) 178° View angle (Vertically) 178°
Surface polarizer Anti-Glare type Low reflective coat
Colour filter Vertical stripe
Backlight Cold cathode fluorescent lamp
Power supply voltage in LCD 12 V
Power supply voltage in inverter 24 V
Panel interface system LVDS (Low Voltage Differential Signaling)
2.4.1.2 PIXEL 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.
1-8 (No.YA688<Rev.001>)
2.4.2 VIDEO PROCESSING CPU PIN FUNCTION [IC4101 : MAIN PWB]
Pin Pin name I/O Function
1 REQUEST O Request for MIPS
2NC - Not used
3NC - Not used
4NC - Not used
5NC - Not used
6 BYTE I L fixed
7 CNVSS - GND
8NC - Not used
9NC - Not used
10 RESET I CPU reset [Reset = L]
11 XOUT O X'tal oscillation for CPU system clock (12.5MHz)
12 VSS - GND
13 XIN I X'tal oscillation for CPU system clock (12.5MHz)
14 VCC - 3.3V power supply
15 NC - Not used
16 BL_ON_IN I Detect power on/off control of back-light
17 MAIN_VD I RGB_Vsync input
18 VD I Vsync of LVDS drive
19 NC - Not used
20 SCL_EEPROM O Clock for I2C bus (for IC4102: MEMORY)
21 NC - Not used
22 SDA_EEPROM I/O Data for I2C bus (for IC4102: MEMORY)
23 VD I Vsync of LVDS drive
24 NC - Not used
25 NC - Not used
26 NC - Not used
27 SCL3 I Clock for I2C bus
28 SDA3 I/O Data for I2C bus
29 E8_DATAO O Data for Debugging Emulator
30 E8_DATAI I Data for Debugging Emulator
31 E8_CLK I Clock for Debugging Emulator
32 E8_BUSY O Busy for Debugging Emulator
33 T2R_TXD O Serial Interface for service
34 T2R_RXD I Serial Interface for service
35 NC - Not used
36 NC - Not used
37 MODE_SEL I H fixed
38 NC - Not used
39 E8_EPM I Setting for flash write mode
40 NC - Not used
41 NC - Not used
42 NC - Not used
43 FORZA_RST O Reset for IC5001
44 E8_CE I Setting for flash write mode
45 SDA_FORZA I/O Data for I2C bus (for IC5001)
46 SCL_FORZA O Clock for I2C bus (for ICIC5001)
47 NC - Not used
48 NC - Not used
49 CS O SPI chip select for LVDS drive
50 CARIB_RST O Reset for LVDS drive
51 BL_ON O Power on/off control for back-light [ON = H]
52 LCD_POW O Power on/off control for LCD drive [ON = H]
Pin Pin name I/O Function
53 LVDS_SEL - Not used
54 NC - Not used
55 NC - Not used
56 NC - Not used
57 MODE3 - Not used
58 MODE2 - Not used
59 MODE1 - Not used
60 VCC - 3.3V power supply
61 MODE0 - Not used
62 VSS - GND
63 NC - Not used
64 NC - Not used
65 NC - Not used
66 NC - Not used
67 NC - Not used
68 NC - Not used
69 NC - Not used
70 NC - Not used
71 STATUS - Not used
72 NC - Not used
73 LCD_POW_IN I Detect power on/off control of LCD drive
74 AUDIO_RST O Reset for IC4501
75 SDA_AUDIO O Data for I2C bus (for IC4501)
76 SCL_AUDIO O Clock for I2C bus (for IC4501)
77 NC - Not used
78 NC - Not used
79 NC - Not used
80 NC - Not used
81 NC - Not used
82 NC - Not used
83 NC - Not used
84 NC - Not used
85 NC - Not used
86 NC - Not used
87 NC - Not used
88 NC - Not used
89 NC - Not used
90 NC - Not used
91 NC - Not used
92 NC - Not used
93 RF_AGC - Not used
94 AVSS - GND
95 EE_SENS I Eco sensor detection
96 VREF - 3.3V power supply
97 AVCC - 3.3V power supply
98 MISO O SPI data for LVDS drive
99 MOSI I SPI data for LVDS drive
100 SCLK O SPI clock for LVDS drive
(No.YA688<Rev.001>)1-9
SECTION 3
DISASSEMBLY
3.1 DISASSEMBLY PROCEDURE
• 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.
3.1.1 REMOVING THE REAR COVER (Fig.3-1)
(1) Remove the 1 screw [A]. (2) Remove the POWER CORD COVER. (3) Remove the 8 screws [B] and 12 screws [C]. (4) Remove the REAR COVER.
3.1.2 REMOVING THE MAIN PWB (Fig.3-1)
• Remove the REAR COVER. (1) Remove the 2 hooks [a]. (2) Remove the DIGITAL BASE. (3) Remove the 1 screw [E]. (4) Remove the TERMINAL BASE. (5) Remove the 5 screw [F]. (6) Remove the MAIN PWB.
3.1.3 REMOVING THE POWER PWB (Fig.3-1)
• Remove the REAR COVER.
• Remove the POWER CORD. (1) Remove the 6 screws [G]. (2) Remove the POWER PWB.
3.1.4 REMOVING THE SW PWB (Fig.3-1)
• Remove the REAR COVER. (1) Remove the 2 hooks [b]. (2) Remove the CONTROL KNOB with SW PWB. (3) Remove the SW PWB from the CONTROL KNOB.
3.1.5 REMOVING THE REMOTE PWB (Fig.3-1)
• Remove the REAR COVER. (1) Remove the 1 screw [H]. (2) Remove the REMOTE PWB.
3.1.6 REMOVING THE SPEAKER (Fig.3-1)
• Remove the REAR COVER. (1) Remove the SPEKAER.
3.1.7 REMOVING THE STAND (Fig.3-1)
(1) Remove the 4 screws [J]. (2) Remove the STAND.
3.1.8 REMOVING THE LED PWB (Fig.3-1)
• Remove the REAR COVER.
• Remove the POWER PWB.
• Remove the SPEAKER.
• Remove the STAND. (1) Remove the 3 screws [K], 4 screws [L] and 2 screws [M]. (2) Remove the MAIN BASE. (3) Remove the 2 screws [N]. (4) Remove the LED PWB.
3.1.9 REMOVING THE LCD PANEL UNIT (Fig.3-1)
• Remove the REAR COVER.
• Remove the STAND.
• Remove the MAIN BASE. (1) Remove the 1 screw [H]. (2) Remove the LCD SUPPORT BRACKET and REMOTE
PWB. (3) Remove the 2 screws [P]. (4) Remove the LCD SUPPORT BRACKET (x2). (5) Remove the LCD PANEL UNIT from the FRONT PANEL.
1-10 (No.YA688<Rev.001>)
POWER CORD COVER
POWER CORD
B
C
A
B
REAR COVER
F
MAIN PWB
INSULATOR
CONTROL ASSY
SW PWB
aa
LCD SUPPORT
P
BRACKET
D
POWER PWB
K
REMOTE PWB
H
L
MAIN BASE
LCD SUPPORT BRACKET
E
DIGITAL BASE
K
L
K
aa
L
TERMINAL BASE
J
M
L
M
STAND
P
LCD PANEL UNIT
FRONT PANEL
LCD SUPPORT BRACKET
N
SPEAKER
LED PWB
SPEAKER
Fig.3-1
(No.YA688<Rev.001>)1-11
3.1.10 REMOVING THE CONTROL PWB (Fig.3-2)
• Remove the REAR COVER.
• Remove the MIAN BASE. (1) Remove the 5 screws [A]. (2) Remove the LCD CONTROL PWB COVER. (3) Remove the LCD CONTROL PWB.
LCD CONTROL PWB COVER
3.1.11 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.
INVERTER PWB COVER
B
A
LCD CONTROL PWB
LCD PANEL UNIT
INVERTER PWB
Fig.3-2
1-12 (No.YA688<Rev.001>)
3.2 MEMORY IC REPLACEMENT
S001 R DRIVE M 000
• 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
Symbol Number of pins Mounting PWB Main content of data
IC1003
IC3004
IC3005
IC3006
IC4102
8-pin MAIN PWB Setting data for IC1001(MAIN CPU) is memorized.
8-pin MAIN PWB E-DID DATA for HDMI is memorized.
8-pin MAIN PWB E-DID DATA for HDMI is memorized.
8-pin MAIN PWB E-DID DATA for HDMI is memorized.
8-pin MAIN PWB Setting value of IC4101(VIDEO PROCESS 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.3-2). Refer to the SERVICE ADJUSTMENT for setting.
3.2.3 SERVICE MODE SETTING
SERVICE MODE SCREEN
SERVICE MENU SCREEN
Service Menu
1
Adjust
2
Monitor Mode
3
System Configuration
4
Software Update
5
I2c Stop Mode
6
EDID Write Protect
7
HDMI_EQ Setting
8
Software Version Check
9
Calibration Setting
Navigate
Apply
Cancel
Press [1] key
ADJUSTMENT MODE SCREEN
S001 R DRIVE M 000
SETTING ITEM
Setting items Settings Item No.
Video system setting Adjust S001 - S003
3.2.4 SETTINGS OF FACTORY SHIPMENT
3.2.4.1 BUTTON OPERATION
Setting item Setting position
Power Off Channel PR1 Volume 10 TV/AV TV
3.2.4.2 REMOTE CONTROL DIRECT OPERATION
Setting item Setting position
Channel PR01 Volume 10 Sub Power Off Zoom Auto Sleep Timer Off Subtitle Selection On Menu Language English Country United Kingdom System Language English Place of Installation Home
Fig.3-2
(No.YA688<Rev.001>)1-13
3.2.4.3 REMOTE CONTROL MENU OPERATION
(1) PICTURE
(3) SYSTEM SETUP
Setting item Setting position
Picture Mode Bright (SHOP)
Standard (HOME)
Colour Temp. Cool(SHOP)
Normal(HOME)
Features
Super Digipure Mid
Colour Management On
Picture Management On
Smart Picture On
Dynamic Backlight On
MPEG Noise Reduction Off
Colour System Auto
4:3 Aspect Setting Panoramic
1080 Auto Setting Panoramic
(2) SOUND
Setting item Setting position
Stereo / I•II Stereo Sound
Bass Centre
Treble Centre
Balance Centre
Surround Off
Auto Volume Control Off
Digital Audio Output Full
Setting item Setting position
Time Zone Auto
System Language English
Assistive Services -
Enter PIN code 000
Maturity Rating None
Connection Setting EXT-3 Setting: Component
EXT ID Setting: ----
Blue Back On
Power Lamp On
Radio Mode Off
(4) PR INSTALLATION
Setting item Setting position
Menu Language English
Antenna Power Off
Favourite Setting Select None
PR Lock Lock None
Auto Demonstration Off
1-14 (No.YA688<Rev.001>)
3.3 REPLACEMENT 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.
A
B
C
(4) Then solder leads B and C.
A
B
C
(No.YA688<Rev.001>)1-15
SECTION 4
ADJUSTMENT
4.1 ADJUSTMENT 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.
4.2 PRESET SETTING BEFORE ADJUSTMENTS
Unless otherwise specified in the adjustment items, preset the following functions with the REMOTE CONTROL UNIT.
Setting item Settings position
Picture Mode Standard
Picture Adjustments Centre
Colour Temp. Normal
Super Digipure Auto
Movie Theatre Auto
Colour Management On
Picture Management On
Zoom Full
4.4 BASIC OPERATION OF SERVICE MODE
4.4.1 HOW TO ENTER THE SERVICE MODE
(1) Press [INFORMATION] 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
Monitor Mode
3
System Configuration
4
Software Update
5
I2c Stop Mode
6
EDID Write Protect
7
HDMI_EQ Setting
8
Software Version Check
9
Calibration Setting
Navigate
4.4.2 HOW TO EXIT THE SERVICE MODE
Press the [BACK] key to exit the Service mode.
4.4.3 SERVICE MODE SELECT KEY LOCATION
[Function/] key
[MENU] key
Apply
Cancel
[FUNCTION /] key
[BACK] key
4.3 MEASURING INSTRUMENT AND FIXTURES
• Signal generator (Pattern generator) [PAL]
• Remote control unit
1-16 (No.YA688<Rev.001>)
[MUTING] key
[INFORMATION] key
4.4.4 SERVICE MODE FLOW CHART
S001 R DRIVE M 000
ADJUSTMENT MODE MONITOR MODE
SERVICE MENU SCREEN
Service Menu
1
Adjust
2
Monitor Mode
3
System Configuration
4
Software Update
5
I2c Stop Mode
6
EDID Write Protect
7
HDMI_EQ Setting
8
Software Version Check
9
Calibration Setting
Apply
Navigate
Cancel
AUS GRC TWN
AUT HUN UND
BEL IRL
BGR ITA
CHE LUX
CZE NLD
DEU NOR
DNK POL
ESP PRT
FIN SGP
FRA SWE
GBR
01:Australia
Monitor Mode
S001 R DRIVE M 000
[1] key [2] key
Selected source RF Frecuency 045.25
Signal format ----- Signal Strength 0
UTC Signal Quality 0
Service Name ----- ONID 0
Video No Signal LCN Scart1
Audio BG NoSound Language English
Network Name CA No Information
Service Type
SYSTEM CONFIGRATION SOFTWARE UPDATE
System Configuration
Country
TUR
English Hungarian Serbian
German Russian Slovak
French
Italian
Spanish Czech
Catalan Bulgarian
Dutch Ukrainian
Danish Turkish
Swedish Romanian
Norwegian Arabic
Finnish Chinese
Polish
13
Navigate
Language
Greek
Portuguese
Croatian
Install
Store
Cancel
Slovenian
Taiwanese
21
Maturlty Rating
xxxxxx
Subtitle On
xxxxxx
Model
xxxxxx
Debug Menu On
xxxxxx
Notification Log
xxxxxx
UI Printf level
xxxxxx
[3] key [4] key
Software Upgrade Application 52232-0.25.03.0 (dev)
Upgrade menu Local upgrades/applications
Local upgrades/applications No software found on media
Current software info
I2C STOP MODE EDID WRITE PROTECT
[5] key [6] key
No display
Edid Write Protect
Enable
Back:EXIT
HDMI_EQ SETTING SOFTWARE VERSION CHECK
Software Version Check
HDMI EQ Setting
HDMI 1.3 compliant
[7] key [8] key
Back:EXIT
TVM 0123456789ABCDEF
E2PROM LCH60504-001A
CHM 8765-4321
Carib soft 0001
Carib data 0001
Build May 19 2008 12:34:56
Cancel
SOUND CALIBRATION SETTING
Calibration Setting
Secam-L ---
Secam-L' ---
Start
Cancel
Start
[9] key
(No.YA688<Rev.001>)1-17
4.4.5 SERVICE MODE ITEMS
S001 R DRIVE M 000
4.4.5.1 ADJUSTMENT MODE
This mode is used to adjust the VIDEO CIRCUIT.
HOW TO ENTER THE ADJUSTMENT MODE
When the SERVICE MENU SCREEN of SERVICE MODE is displayed, press [1] key to enter the ADJUSTMENT MODE.
4.4.5.2 MONITOR MODE
This mode displays the signal status of channel that has been selected now.
4.4.5.3 SYSTEM CONFIGRATION
This mode selects the function that can be used by the user menu.
DESCRIPTION OF STATUS DISPLAY
ADJUSTMENT MODE
(2) SETTING ITEM NAME
S001 R DRIVE M 000
(3) SETTING ITEM No.
(1) COLOUR TEMP.
H: COOL M : NORMAL L: WARM
(2) SETTING ITEM NAME
Setting item name are displayed.
(3) SETTING ITEM NO.
Setting item numbers are displayed. The setting item numbers to be displayed are listed below.
(4) SETTING VALUE (DATA)
(1) COLOUR TEMP.
4.4.5.4 SOFTWARE UPDATE
This mode updates the version of software.
4.4.5.5 I2C STOP MODE [NO DISPLAY]
This mode is unused.
4.4.5.6 EDID WRITE PROTECT
This mode sets memory with EDID data to write protection.
4.4.5.7 HDMI_EQ SETTING
This mode switches HDMI1.3 compliant and AWG28.
4.4.5.8 SOFTWARE VERSION CHECK
This mode displays the version of microcomputer software and memory.
4.4.5.9 SOUND CALIBRATION SETTING
This mode sets SOUND CALIBRATION.
Item No. Item Variable range Setting value
S001 R DRIVE 000 - 255 000
S002 G DRIVE 000 - 255 000
S003 B DRIVE 000 - 255 000
(4) SETTING VALUE (DATA)
The SETTING VALUE is displayed.
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)
Changed setting value is memorized by pressing [MUTING] key.
1-18 (No.YA688<Rev.001>)
4.5 ADJUSTMENT PROCEDURE
Item
SOUND CALIBRATION
WHITE BALANCE (HIGHLIGHT)
Measuring
instrument
Remote control unit [9. Calibration Setting] (1) Receive any bilingual broadcast.
Remote control unit
Signal generator
Adjustment part Description
(2) Select "9. Calibration Setting" from the SERVICE
MODE. (3) Press the "OK" key to start the calibration. (4) After "Finish" is displayed, press the [MENU] key to
exit the menu.
[1. Adjust] S001: R DRIVE (Red drive) S002: G DRIVE (Green drive) S003: B DRIVE (Blue drive)
(1) Receive a PAL 75% all white signal. (2) Set PICTURE MODE to "STANDARD". (3) Set ZOOM to "FULL". (4) Set COLOUR TEMP. to "NORMAL". (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 "000".
(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 memorize the set value.
SECTION 5
TROUBLESHOOTING
5.1 SELF CHECK FUNCTIONS
5.1.1 OUTLINE
This model has a "Self-diagnosis function," which checks the operation state of the circuits inside the set, and informs us of a failure. Diagnosis is performed when the power is turned on, and information input to the main microcomputer is monitored at all time. The diagnosis is displayed by LED flashing.
5.1.2 INDICATION OF SELF DIAGNOSIS BY USING LED
Flashing LEDs located on the front panel indicate the result of self-diagnosis.
Type of error POWER LED flash cycle
Low bias line short protection
<Explanation of operation>
If an error is detected, the power is turned off. Shortly after the power is turned off, the POWER LED will be blinked. Power cannot be turned on until the power cord takes out and inserts, after the power is turned off.
Repeating slow flashes 9 times and fast flashes 9 times.
(No.YA688<Rev.001>)1-19
Victor Company of Japan, Limited
Display Division 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan
(No.YA688<Rev.001>)
Printed in Japan
VSE
Loading...
+ 45 hidden pages