Preliminary
SERVICE MANUAL
WIDE LCD PANEL TELEVISION
YA30420056
LT-17B60SU,
LT-17B60SJ
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
COPYRIGHT © 2005 Victor Company of Japan, Limited
No.YA304
2005/6
SPECIFICATION
Items Contents
Dimensions ( W × H × D ) 47.6cm × 43.6cm × 18.3cm [Included stand]
47.6cm × 36.3cm × 7.6cm [TV only]
Mass 7.4kg [Included stand]
6.4kg [TV only]
Power Input DC12V
AC220 ~ 240V 50Hz
Power Consumption 45W (Standby: 3.0W)
TV RF System CCIR (B/G, DK, I, L)
Colour System PAL / SECAM / NTSC 3.58/4.43 [EXT only]
Stereo System A2 (B/G) / NICAM (B/G, I, L)
Receiving Frequency VHF
Intermediate
Frequency
Colour Sub
Carrier Frequency
Teletext System FLOF (Fastext level 2.5), WST(World Standard system)
LCD panel 17V-inch wide aspect (15:9)
Screen Size Diagonal : 43.4cm (H: 37.0cm × V : 22.5cm)
Display Pixels Horizontal : 1280 dots × Vertical : 768 dots (W-XGA)
Audio Power Output 5W + 5W(10% THD)
Speaker 3.4cm, round type × 2
Aerial terminal (VHF/UHF) F-type connector, 75Ω unbalanced, coaxial
EXT-1 / EXT-2 (Input / Output) 21-pin Euro connector (SCART socket ) × 2
EXT-3 (Input) S-Video
PC (RGB) Input D-sub 15pin × 1
PC AUDIO input 3.5mm stereo mini jack × 1
Audio output 500mV (rms), Low impedance, RCA pin jack × 2
Headphone 3.5mm stereo mini jack × 1
Remote Control Unit RM-C1861 (AA/R6 dry cell battery × 2)
Design & specifications are subject to change without notice.
SECAM
47 MHz - 470 MHz
UHF
470 MHz - 862 MHz
VIF
38.9 MHz (B/G, I, L)
SIF
33.4 MHz (5.5MHz : B/G)
32.9 MHz (6.0MHz : I)
32.4 MHz (6.5MHz : L)
PAL
4.43 MHz
4.40625 MHz / 4.25MHz
NTSC
3.58 MHz / 4.43 MHz
TOP (German system)
Mini-DIN 4 pin × 1
Y: 1V (p-p), Positive (Negative sync provided), 75 Ω
C: 0.286V (p-p) (Burst signal), 75 Ω
Video
1V (p-p), Positive (Negative sync provided), 75 Ω, RCA pin jack × 1
Audio
500mV (rms), High impedance, RCA pin jack × 2
R/G/B : 0.7V (p-p), 75Ω
HD / VD : 1V (p-p) to 5V (p-p), high impedance
< Available signal >
VGA : 640 pixels × 480 pixels (Horizontal : 31.5kHz / Vertical : 60Hz)
XGA : 1024 pixels × 768 pixels (Horizontal : 48.4kHz / Vertical : 60Hz)
1-2 (No.YA304)
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 1000Ω per volt or more
sensitivity in the following manner. Connect a 1500Ω
10W resistor paralleled by a 0.15µF AC-type capacitor
between an exposed metal part and a known good earth
ground (water pipe, etc.). Measure the AC voltage
across the resistor with the AC voltmeter. Move the
resistor connection to each exposed metal part,
particularly any exposed metal part having a return path
to the chassis, and measure the AC voltage across the
resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Any voltage measured must
not exceed 0.75V AC (r.m.s.). This corresponds to
0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.3V AC
(r.m.s.). This corresponds to 0.2mA AC (r.m.s.).
AC VOLTMETER
(HAVING 1000 /V,
OR MORE SENSITIVITY)
0.15 F AC-TYPE
GOOD EARTH GROUND
1500 10W
PLACE THIS PROBE
ON EACH EXPOSED
ME TAL PAR T
(No.YA304)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.
1-4 (No.YA304)
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.
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.
Use the supplied screws to firmly attach the supplied hooks
(OPTION) to the back of the TV, and use commercially available
cord to fix the TV to rigid components such as walls and columns.
Wall
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.
100 mm
100 mm
*Diagram differs from actual appearance.
100 mm
100 mm
TV
AV
MENU
P/ch
50 mm
Hook
TV Stand
It fixes in a band.
*Diagram differs from actual appearance.
1.3.4 NOTES ON HANDLING
(1) WHEN TAKING UNIT OUT OF A PACKING CASE
When taking the unit out of a packing case, do not grasp
the upper part of the unit. If you take the unit out while
grasping the upper part, the LCD PANEL may be damaged
because of a pressure. Instead of grasping the upper part,
put your hands on the lower backside or sides of the unit.
(2) AS FOR PRESSING OR TOUCHING A SPEAKER
Be careful not to press the opening of the speaker in the
lower part of the unit and around them since the decorative
sheet on the surface of the openings may be deformed.
(No.YA304)1-5
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.
1.4.2 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.
1.4.3 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).
1-6 (No.YA304)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 FEATURES
T-V LINK
When you have a T-V LINK compatible VCR connected to the
EXT-2 Terminal on the TV,it is easier to set up the VCR and to
view videos.
ZOOM
This function can change the screen size according to the
picture aspect ratio.
2.2 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)
9 GND (G) Used Used
10 SCL / T-V LINK Not used Used
11 G input 700mV
12 SDA Not used Used (SDA2)
13 GND (R) Used Used
14 GND (YS) Used Not used
15 R / C input R : 700mV
16 Ys input (FAST SW) Low : 0V-0.4V, High : 1V-3V, 75Ω Used Used
17 GND (VIDEO output) Used Used
18 GND (VIDEO input) Used Used
19 VIDEO output 1V
20 VIDEO / Y input 1V
21 COMMON GND Used Used
Low : 0V-3V
High : 8V-12V, High impedance
C : 300mV
(P-P)
(P-P)
, 75Ω Used Used
(B-W)
, 75Ω Used Used
(B-W)
, 75Ω
(B-W)
, 75Ω
(P-P)
(Negative sync), 75Ω Used (TV OUT) Used (LINE OUT)
(Negative sync), 75Ω 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
OFF TIMER
This function can set the TV to automatically turn off after a set
time.
COLOUR SYSTEM
If the picture is not clear or no colour appears, change the
current colour system to another colour system.
Used Used
(SCL2 / TV-LINK)
Used (R) Used (C2/R)
21 19 17 15 13 11 9 7 5 3 1
(No.YA304)1-7
2.3 TECHNICAL INFORMATION
2.3.1 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.
2.3.1.1 SPECIFICATIONS
The following table shows the specifications of this unit.
Item Specifications Remarks
Displayed colour 16777216 colours 256 colours for R, G, and B
Brightness 450cd/m
2
Contrast ratio 400: 1
Response time 25ms
View angle Horizontally: 176°, Vertically: 176°
2.3.1.2 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.YA304)
SECTION 3
DISASSEMBLY
3.1 DISASSEMBLY PROCEDURE
NOTE:
• Make sure that the power cord is disconnected from the outlet.
• Pay special attention not to break or damage the parts.
• When removing each board, remove the connectors as required.
• Taking notes of the connecting points (connector numbers) makes service procedure manageable.
• Make sure that there is no bent or stain on the connectors before inserting, and firmly insert the connectors.
3.1.1 REMOVING THE FOOT ASSEMBLY
• Remove the HINGE COVER.
(1) Remove the 4 screws [A], then remove the FOOT ASS'Y.
3.1.2 REMOVING THE FOOT SUPPORT
• Remove the HINGE COVER & the FOOT ASSEMBLY.
(1) Remove the 4 screws [B].
(2) Remove the FOOT SUPPORT.
3.1.3 REMOVING THE BACK COVER
• Remove the HINGE COVER & the FOOT ASSEMBLY.
• Remove the TFT DOOR SOCKET & AV DOOR SOCKET.
(1) Remove the 5 screws [C].
(2) Remove the BACK COVER toward you.
3.1.4 REMOVING THE AV JACK PWB
• Remove the HINGE COVER & the FOOT ASSEMBLY.
• Remove the BACK COVER.
(1) Remove the 2 screws [D].
(2) Remove the AV JACK PWB.
3.1.5 REMOVING THE SIDE CONTROL PWB
• Remove the HINGE COVER & the FOOT ASSEMBLY.
• Remove the BACK COVER.
(1) Remove the 2 screws [E].
(2) Remove the SIDE CONTROL PWB with control knob.
(3) Remove the SIDE CONTROL PWB from control knob.
3.1.6 REMOVING THE HEADPHONE JACK PWB
• Remove the HINGE COVER & the FOOT ASSEMBLY.
• Remove the BACK COVER.
(1) Remove the 1 screw [F].
(2) Remove the HEADPHONE JACK PWB.
3.1.7 REMOVING THE DISPLAY ASSEMBLY
• Remove the HINGE COVER & the FOOT ASSEMBLY.
• Remove the BACK COVER.
(1) Remove the 4 screws [G].
(2) Remove the DISPLAY ASSEMBLY.
3.1.9 REMOVING THE MAIN PWB
• Remove the HINGE COVER & the FOOT ASSEMBLY.
• Remove the BACK COVER.
• Remove the DISPLAY ASSEMBLY.
• Remove the BRACKET SCART.
(1) Remove the 7 screws [I].
(2) Remove the MAIN PWB.
3.1.10 REMOVING THE INVERTER UNIT
• Remove the HINGE COVER & the FOOT ASSEMBLY.
• Remove the BACK COVER.
• Remove the DISPLAY ASSEMBLY.
• Remove the BRACKET SCART.
(1) Remove the 2 screws [J].
(2) Remove the INVERTER UNIT.
3.1.11 REMOVING THE MAIN FRAME
• Remove the HINGE COVER & the FOOT ASSEMBLY.
• Remove the BACK COVER.
• Remove the DISPLAY ASSEMBLY.
• Remove the BRACKET SCART.
• Remove the MAIN PWB.
(1) Remove the 4 screws [K].
(2) Remove the MAIN FRAME from the LCD PANEL UNIT.
3.1.12 REMOVING THE LCD PANEL UNIT
• Remove the HINGE COVER & the FOOT ASSEMBLY.
• Remove the BACK COVER.
• Remove the DISPLAY ASSEMBLY.
• Remove the BRACKET SCRAT & MAIN PWB.
• Remove the MAIN FRAME.
(1) Remove the 4 screws [L].
(2) Follow the same step when removing the other hand
DISPLAY SUPPORT.
(3) Sightly raise the both sides of the LCD PANEL by hand
from the FRONT COVER.
NOTE :
• Pay special attention not to break or damage on the LCD
PANEL face or frame.
3.1.8 REMOVING THE BRACKET SCART
• Remove the HINGE COVER & the FOOT ASSEMBLY.
• Remove the BACK COVER.
• Remove the DISPLAY ASSEMBLY.
(1) Remove the 2 screws [H].
(2) Remove the BRACKET SCART.
3.1.13 REMOVING THE SPEAKERS
• Remove the HINGE COVER & the FOOT ASSEMBLY.
• Remove the BACK COVER.
(1) Remove the 4 screws [M].
(2) Remove the SPEAKER from the FRONT COVER.
(3) Follow the same when removing the other hand speakers.
3.1.14 REMOVING THE LED PWB
• Remove the HINGE COVER & the FOOT ASSEMBLY.
• Remove the BACK COVER.
(1) Remove the 2 screws [N].
(2) Remove the LED PWB from the FRONT COVER.
(No.YA304)1-9
FRONT SIDE
AV DOOR
SOCKET
LCD
PANEL
UNIT
MAIN
FRAME
K
C
INVERTER
UNIT
CONTROL
KNOB
E
SIDE CONTROL
PWB
J
K
MAIN PWB
BRACKET
SCART
I
H
TFT DOOR
SOCKET
HINGE COVER
F
AV JACK
PWB
HEADPHONE
JACK PWB
G
A
B
METAL HINGE
BRACKET
M
SPEAKER
D
DISPLY
ASSEMBLY
M
SPEAKER
LED
PWB
N
FOOT ASS'Y
1-10 (No.YA304)
FOOT SUPORT
3.2 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.
3.2.1 SETTINGS OF FACTORY SHIPMENT
3.2.1.1 BUTTON OPERATION 3.2.1.2 REMOTE CONTROL DIRECT OPERATION
Setting item Setting position
POWER Off
TV/AV TV
3.2.1.3 REMOTE CONTROL MENU OPERATION
(1) PICTURE
Setting item Setting position
MODE Bright
Contrast 36 Step
Bright-1 26 Step
Sharpness 11 Step
Colour 39 Step
Bright-2 31 Step
Colour Temp. Cool
Nolse Red. Min
(2) SOUND
Setting item Setting position
Volume 10 Step
Bass 16 Step
Treble 15 Step
Balance 16 Step
Hyper Sound Off
Sound Mode Mono
Setting item Setting position
ZOOM AUTO
(3) FEATURES
Setting item Setting position
Sleep Timer Off
Child Lock Off
Language English
EXT-2 Output TV
Blue Back Off
(4) Install [TV MODE]
Setting item Setting position
Colour System Auto
Decorder(EXT-2) On
VCR Off
(5) Install [EXT MODE]
Setting item Setting position
Colour System Auto
VCR Off
(No.YA304)1-11
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.
1-12 (No.YA304)
A
B
C
(4) Then solder leads B and C.
A
B
C
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 BASIC OPERATION OF SERVICE MODE
4.2.1 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.
4.2.2 HOW TO EXIT THE SERVICE MODE
Press the [MENU] key to exit the Service mode.
4.2.3 CHANGE AND MEMORY OF SETTING VALUE
SELECTION OF SETTING MENU & ITEM
• [FUNCTION /] key : Select the SETTING MENU & ITEM
• [OK] key : Decision the SETTING MENU & ITEM
CHANGE OF SETTING VALUE (DATA)
• [FUNCTION /] key.
MEMORY OF SETTING VALUE (DATA)
The setting value will be stored automatically when release the
REMOTE CONTROL UNIT keys
4.2.4 SERVICE MODE SELECT KEY LOCATION
[OK]
[FUNCTION ]
[FUNCTION ]
SERVICE MODE SCREEN
Adjust ...
Options ...
Aps Wss Test ...
17JVC 0. 0. 86
Sep 27 2004 08:47:10
Service
(No.YA304)1-13
4.2.5 SERVICE MODE SETTING ITEMS
Setting menu Setting items Setting menu Setting items
Adjust Group Option 2 Nicam Prs Avl Off
Mode Scart Prs Avl Off
Col. Temp. Scart Volume Avl Off
Contrast Avl
Brightness Sound
Colour Carrier
Sharpness LDLY
Red AGC
Green Aps Wss Test Programme
Blue VPS
Aps Volume Pdc Format 1
Option 1 First APS Pdc Format 2
BG Name
DK WSS
I
L
L'
FM Prs Avl On
Nicam Prs Avl On
Scart Prs Avl On
Scart Volume Avl On
FM Prs Avl Off
SECTION 5
TROUBLESHOOTING
This service manual does not describe TROUBLESHOOTING.
1-14 (No.YA304)
(No.YA304)1-15
Victor Company of Japan, Limited
AV & MULTIMEDIA COMPANY DISPLAY CATEGORY 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan
(No.YA304)
Printed in Japan
VPT
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