JVC I'Art Palette PD-50X795 User manual

SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited No.YA100
2005/2
PDP COLOR TELEVISION
YA10020052
PD-42X795/S,
PD-50X795/Z
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-38
BASIC CHASSIS
FP2
TU-42X795 / TU-50X795
[RECEIVER UNIT]
VM-42X795 / VM-50X795
[PLASMA DISPLAY UNIT]
POWER
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1-2 (No.YA100)
SPECIFICATION
Design & specifications are subject to change without notice.
Items Contents
PD-42X795 PD-50X795
Dimensions ( W ×H ×D ) Plasma Display Unit 116cm ×73.1cm ×10.8cm (45-3/4" ×28-7/8" ×4-1/4") 135cm ×83.6cm ×11cm (53-1/4" ×33" ×4-3/8")
Receiver Unit 43.5cm ×7cm ×31.3cm (17-1/4" ×2-7/8" ×12-3/8")
Mass Plasma Display Unit 38kg (83.6lbs) 51kg (112.2lbs)
Receiver Unit 4.3kg (9.5lbs)
TV RF System (Analog / Digital) Analog
Digital
CCIR (M)
ATSC terrestrial / Digital cable
Color System (Analog) NTSC
Sound System (Analog) BTSC (Multi Channel Sound)
Teletext System (Analog) Closed caption (T1-T4 / CC1-CC4)
TV Receiving Channels and
Frequency (Analog)
VHF Low
VHF High
UHF
CATV
02ch - 06ch : 54MHz - 88MHz
07ch - 13ch : 174MHz - 216MHz
14ch - 69ch : 470MHz - 806MHz
54MHz - 804MHz
Low Band : 02 - 06
High Band : 07 - 13
Mid Band : 14 - 22
Super Band : 23 - 36
Hyper Band : 37 - 64
Ultra Band : 65 - 94, 100 - 135
Sub Mid Band : 01, 96 - 99
TV / CATV Total Channel 191 Channels
Intermediate Frequency (Analog) Video IF
Sound IF
45.75 MHz
41.25 MHz (4.5MHz)
Color Sub Carrier Frequency (Analog) 3.58 MHz
Power Input AC120V, 60Hz
Power Consumption Plasma Display Unit 387.4W (Max) / 369W (Avg) 491.4W (Max) / 468W (Avg)
Receiver Unit 39.9W (Max) / 38W (Avg)
Plasma Display Panel (PDP) 42V wide aspect (16:9) 50V wide aspect (16:9)
Screen Size Diagonal : 107.5cm (H:933cm ×V : 53.3cm) Diagonal : 127.0cm (H:110.7cm ×V : 62.2cm)
Display Pixels Horizontal : 1024 pixels ×Vertical : 768 pixels (XGA) Horizontal : 1365 pixels ×Vertical : 768 pixels (W-XGA)
Audio Power Output 20W + 20W
Speaker Main (DD)
Tweeter
Woofer
9.5cm ×1cm (3-3/4 ×7-7/16"), oval type ×2
2cm (13/16"), round type ×2
13cm ×6.5cm (5-1/8 ×2-9/16"), oval type ×2
Antenna terminal (VHF/UHF, ATSC / DIGITAL CABLE IN) F-type connector, 75Ωunbalanced, coaxial ×2
Video / Audio Input
[INPUT-1/2/3/4]
Component Video
[INPUT-1/2]
1125i / 750p
525p / 525i
S-Video
[INPUT-1/3/4]
Video
Audio
RCA pin jack ×6
Y : 1V (p-p) (Sync signal: 0.35V(p-p), 3-value sync.), 75 Ω
Pb/Pr : ±0.35V(p-p), 75 Ω
Y : 1V (p-p), positive (Negative sync), 75 Ω
Pb/Pr : 0.7V(p-p), 75 Ω
Mini-DIN 4 pin ×3
Y: 1V (p-p), positive (Negative sync), 75 Ω
C: 0.286V (p-p) (Burst signal), 75 Ω
1V (p-p), positive (Negative sync), 75 Ω, RCA pin jack ×4
500mV (rms), high impedance, RCA pin jack ×8
Digital Input Video
Audio
HDMI connector ×1
(Digital-input terminal is not compatible with picture signals of computer signal)
Digital: HDMI connector ×1
Anarog: 500mV(rms) (-4dBs), high impedance, RCA pin jack ×2
Audio Output
Variable
Fix
RCA pin jack ×2
More than 0 to 1000mV (rms) (+2.2dBs)
500mV(rms), (-4dBs), low impedance (400Hz when modulated 100%)
Monitor / Recording Output S-Video
Video
Audio
Mini-DIN 4pin ×1
Y: 1V (p-p), 75Ω
C: 0.286V(p-p) (burst signal), 75Ω
1V (p-p), 75Ω, RCA pin jack ×1
250mV(rms) (-10dBs), Fs-18dB low impedance, RCA pin jack ×2
PC (RGB) Input D-sub 15pin ×1
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)
Center Channel Input 500mV(rms) (-4dBs), high impedance,RCA pin jack ×1
Sub woofer Output More than 0 to 1000mV (rms) (+2.2dBs), low impedance (80Hz when modulated 100%), RCA pin jack ×1
Digital Audio Optical Output Digital SPDIF ×1
AV COMPULINK lll 3.5mm mini jack ×1
iLink Input/Output TS In/Out (4-pin, S400) ×2, IEEE1394 compliant DTCP digital copy protection compatible
Display Input / Output
(For system cable)
Control / Audio
Video
D-sub 26-pin connector ×2
DVI-D 24-pin connector ×2
Remote Control Unit RM-C14G (AA/R6 / UM-3 battery ×2)
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(No.YA100)1-3
SECTION 1
PRECAUTION
1.1 SAFETY PRECAUTIONS
(1) The design of this product contains special hardware,
many circuits and components specially for safety
purposes. For continued protection, no changes should be
made to the original design unless authorized in writing by
the manufacturer. Replacement parts must be identical to
those used in the original circuits. Service should be
performed by qualified personnel only.
(2) Alterations of the design or circuitry of the products should
not be made. Any design alterations or additions will void
the manufacturer's warranty and will further relieve the
manufacturer of responsibility for personal injury or
property damage resulting therefrom.
(3) Many electrical and mechanical parts in the products have
special safety-related characteristics. These
characteristics are often not evident from visual inspection
nor can the protection afforded by them necessarily be
obtained by using replacement components rated for
higher voltage, wattage, etc. Replacement parts which
have these special safety characteristics are identified in
the parts list of Service manual. Electrical components
having such features are identified by shading on the
schematics and by ( ) on the parts list in Service
manual. The use of a substitute replacement which does
not have the same safety characteristics as the
recommended replacement part shown in the parts list of
Service manual may cause shock, fire, or other hazards.
(4) Don't short between the LIVE side ground and
ISOLATED (NEUTRAL) side ground or EARTH side
ground when repairing.
Some model's power circuit is partly different in the GND.
The difference of the GND is shown by the LIVE : ( ) side
GND, the ISOLATED (NEUTRAL) : ( ) side GND and
EARTH : ( ) side GND.
Don't short between the LIVE side GND and ISOLATED
(NEUTRAL) side GND or EARTH side GND and never
measure the LIVE side GND and ISOLATED (NEUTRAL)
side GND or EARTH side GND at the same time with a
measuring apparatus (oscilloscope etc.). If above note will
not be kept, a fuse or any parts will be broken.
(5) If any repair has been made to the chassis, it is
recommended that the PDP POWER SUPPLY setting
should be checked or adjusted.
(6) The high voltage applied to the PDP must conform with that
specified in Service manual. Excessive high voltage can
cause an increase in arcing and possible component
damage, therefore operation under excessive high voltage
conditions should be kept to a minimum, or should be
prevented. If severe arcing occurs, remove the AC power
immediately and determine the cause by visual inspection
(incorrect installation, cracked or melted high voltage
harness, poor soldering, etc.). To maintain the proper
components in the circuitry including the PDP must be the
exact replacements or alternatives approved by the
manufacturer of the complete product.
(7) Do not check high voltage by drawing an arc. Use a high
voltage meter or a high voltage probe with a VTVM.
Discharge the picture tube before attempting meter
connection, by connecting a clip lead to the ground frame
and connecting the other end of the lead through a 10kΩ
2W resistor to the anode button.
(8) 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.
(9) 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 1000Ωper 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)
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
1500 10W
0.15 F AC-TYPE
GOOD EARTH GROUND
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1-4 (No.YA100)
1.2 INSTALLATION
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.
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.
SPACE REQUIRED FOR INSTALLATION OF THE DISPLAY UNIT
SPACE REQUIRED FOR INSTALLATION OF THE RECEIVER UNIT
1.2.3 FALL TIP PREVENTION MEASURES
Take precautionary measures to prevent the unit from falling or
tipping to protect against emergencies such as earthquakes as
well as accidents.
Fasten the supplied hook for tip fall prevention using the screws,
also supplied, behind the display unit, and use them together
with durable cords (to be purchased separately) to secure the
unit to a robust part such as the wall surface or pillars.
8 inch/200 mm
2 inch/50 mm
6 inch/150 mm
6 inch/150 mm
2 inch/50 mm
4 inch/100 mm 4 inch/100 mm4 inch/100 mm 4 inch/100 mm
POWER
PLASMADISPLAY RECEIVER
The supplied hook for tipfall prevention
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(No.YA100)1-5
1.3 PRECAUTIONS REGARDING PDP
1.3.1 PRECAUTIONS DURING NOTES FOR TRANSPORTATION
When transporting the unit, pressure exerted on the internal PDP
(Plasma Display 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 prior to delivery such as
through explaining the handling instructions to transporters.
Ensure that the following requirements are met during
transportation, as the PDP of this unit is made of glass and
therefore fragile:
(1) Avoid vibrations and impacts
The unit may be broken if it is toppled sideways even when
properly packed. Ensure that the unit is carried by at least
2 persons and pay careful attention not to exert any
vibration or impact on it.
(2) Do not place equipment horizontally
Ensure that it is placed upright and not horizontally during
transportation and storage as the PDP is very vulnerable to
lateral impacts and may break easily under such
circumstances.
During transportation, ensure that the unit is loaded along
the traveling direction of travel of the vehicle, and avoid
stacking them on one another.
For storage, ensure that they are stacked in 2 layers or less
even when placed upright.
1.3.2 RESIDUAL IMAGE / BURN-IN ON SCREEN
Like CRTs, "burn-in" may occur when a same image is
continuously displayed over an extended period of time.
As this may also shorten the life span of the PDP. Therefore, turn
off the display when not in use, scroll the screen, make use of
screen-savers, or allow even distribution on the display by
inverting the brightness, switching to complementary colors or
inserting animated images at periodic intervals.
As burn-in is more likely to occur with high brightness and
contrast settings, try to use neutral gradations or medium tone
colors.
Burn-in does not occur in the case of animated images.
When switching to another image after continuous display of the
previous image, residual images may become prominent, as
luminance in a part of the display is higher than the other parts.
This is not a defect but is because due to the discharge surface
of the lighted portion has become being relatively activated and
its luminance higher than the unlighted parts.
1.3.3 INFRARED RAYS
Near Near-infrared rays (800nm to 1000nm) are emitted from the
front of the panel, and this may give rise to malfunctions in
infrared remote controls or communication systems placed near
it. In this case, avoid direct infrared rays (and reflected rays in
some cases) from the screen by either changing the direction of
the unit or other infrared systems or securing a longer keeping a
distance from the screen.
1.3.4 OPTICAL FILTER (PANEL FILTER)
Avoid placing the unit under direct sunlight over a prolonged
period of time. This may cause the optical filter to deteriorate in
quality and color.
Clean the filter surface by wiping it softly lightly with outing
flannels a soft and lightly fuzz cloth (such as flannel).
Do not use solvents such as benzine 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.
As the filter surface is fragile., do not scratch or hit it with hard
materials.
1.3.5 NOTES PRECAUTIONS FOR PEPLACEMENT OF
EXTERIOR PARTS
Take note of the following when replacing exterior parts (back
REAR COVER, FRONT PANEL, optical filter)
• Do not exert pressure on the front of the PDP (glass surface).
• Pay careful attention not to scratch or stain the front of the PDP
(surface) with hands.
• When replacing exterior parts, the front of the PDP should be
placed facing downward. Place a mat, etc. underneath to avoid
causing scratches to the front surface. However, never use
materials that are too soft (such as blanket cloth). If
replacement is made with the PDP surface facing downward
and in contact with the blanket, pressure may be exerted on
the PDP, thus causing damages to it.
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