JVC LT-Z32S2/A User manual

SERVICE MANUAL
COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED No.YA020
2004/3
WIDE LCD PANEL TELEVISION
YA02020043
LT-Z32S2,
LT-Z32S2/A,
LT-Z32S2/S
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-43
BASIC CHASSIS
MK

SERVICE MANUAL
COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED No.YA020B
2004/4
WIDE LCD PANEL TELEVISION
YA020B20044
LT-Z32S2S/H
OUTLINE
DIFFERENCE LIST
EXPLODED VIEW PARTS LIST-2 (Page 3-3)
PACKING PARTS LIST (Page 3-40)
The following items for the LT-Z32S2S/H was changed partly from LT-Z32S2.
Therefore, this service manual describes only the items which differ from those of the LT-Z32S2 service
manual.
For details other than those described in this manual, please refer to the LT-Z32S2 service manual
(No.YA020, 2004/3).
Since the destination and front panel colour were changed, we have issued the SERVICE MANUAL
for LT-Z32S2S/H.
Ref. No. PARTS No. PARTS NAME DESCRIPTION
LT-Z32S2 LT-Z32S2S/H
117 QMPK300-170-JC QMPN260-170-JC POWER CORD 1.7m BLACK
130 LC11688-004A LC11688-006A FRONT PANEL ASSY Inc.No.130A-130B, Silver
Ref. No. PARTS No. PARTS NAME DESCRIPTION
LT-Z32S2 LT-Z32S2S/H
015 LCT1597-001A LCT1597-001B INST BOOK ENGLISH
016 LCT1599-001A LCT1599-001B INST BOOK RUSSIAN,CHINESE,FRENCH,
ARABIC,PERSIAN
019 QAM0054-001 --- CONVERSION PLUG Delete
BASIC CHASSIS
MK

1-2 (No.YA020)
SPECIFICATION
Design and specifications subject to change without notice.
Items Contents
Dimensions (W ×H ×D) 83.3 cm ×63.8 cm ×26.0 cm (Included stand)
83.3 cm ×56.9 cm ×9.7 cm (TV only)
Mass 22.0 kg (Included stand)
19.2 kg (TV only)
TV RF System B, G, I, D, K, K1, M
Colour System PAL / SECAM / NTSC 3.58 / NTSC 4.43 (NTSC:EXT only).
Stereo System A2 (B/G, D/K), NICAM (B/G, I, D/K)
Teletext System FLOF (Fastext), TOP, WST (World Standard System)
Receiving
Frequency
VHF Low
VHF High
UHF
CATV
46.25MHz ~ 168.25MHz
175.25MHz ~ 463.25MHz
471.25MHz ~ 855.25MHz
Mid (X ~ Z+2, S1 ~ S10) / Super (S11 ~ S20) / Hyper (S21 ~ S41) bands
Intermediate
Frequency
VIF
SIF
38.0MHz (B, G, I, D, K, L)
32.26MHz (5.74MHz: B), 32.15MHz (5.85MHz: G), 31.45MHz (6.55MHz: I)
31.75MHz (6.25MHz: D), 32.15MHz (5.85MHz: K)
Colour Sub
Carrier
PAL
SECAM
NTSC
4.43MHz
4.40625MHz / 4.25MHz
3.58MHz / 4.43MHz
Power Input AC110 - AC240 V, 50 Hz / 60 Hz
Power Consumption 177 W, [Standby: 2.3 W]
LCD panel 32V, aspect ratio 15:9
Screen Size Diagonal : 80.2cm (H:41.2cm ×V : 68.7cm)
Display Resolution Horizonal : 1280 dots ×Vertical : 768 dots (W-XGA)
Speaker 6.6 cm round ×2 (Oblique corn)
Audio Power Output 10 W + 10 W (Rated power output)
Aerial Input 75 Ωunbalanced, coaxial
Video / Audio
Input-1/2/3/4
Component Video
[Input-4]
1125i
625p / 525p
625i / 525i
S-Video
[Input-1/2]
Video
Audio
RCA pin jack ×3
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 provided), 75 Ω
Pb/Pr : 0.7V(p-p), 75 Ω
Mini-DIN 4 pin connector ×2
Y: 1V (p-p), Positive (Negative sync provided), 75 Ω
C: 0.286V (p-p) (Burst signal), 75 Ω
1V (p-p), Positive (Negative sync provided), 75 Ω, RCA pin jack ×3
500mV (rms), High impedance, RCA pin jack ×8
Video / Audio
Output
S-Video
Video
Audio
Mini-DIN 4 pin connector ×1
Y: 1V (p-p), Positive (Negative sync provided), 75 Ω
C: 0.286V (p-p) (Burst signal), 75 Ω
1V (p-p), Positive (Negative sync provided), 75 Ω, RCA pin jack ×1
500mV (rms), Low impedance, RCA pin jack ×2
Headphone jack 3.5 mm stereo mini jack ×1
Remote Control Unit RM-C1808 (UM-3/AA/R6 dry cell battery ×2)

(No.YA020)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 voltage setting should be
checked or adjusted.
(6) 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.
(7) Isolation Check (Safety for Electrical Shock Hazard)
After re-assembling the product, always perform an
isolation check on the exposed metal parts of the cabinet
(antenna terminals, video/audio input and output terminals,
Control knobs, metal cabinet, screw heads, earphone jack,
control shafts, etc.) to be sure the product is safe to operate
without danger of electrical shock.
a) Dielectric Strength Test
The isolation between the AC primary circuit and all metal
parts exposed to the user, particularly any exposed metal
part having a return path to the chassis should withstand a
voltage of 3000V AC (r.m.s.) for a period of one second. (.
. . . Withstand a voltage of 1100V AC (r.m.s.) to an
appliance rated up to 120V, and 3000V AC (r.m.s.) to an
appliance rated 200V or more, for a period of one second.)
This method of test requires a test equipment not generally
found in the service trade.
b) Leakage Current 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

1-4 (No.YA020)
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.
1.2.3 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 to
the back of the TV, and use commercially available cord to fix the
TV to rigid components such as walls and columns.
1.2.4 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.
Ventilation hole
150 mm
200 mm
150 mm
200 mm
50 mm
NYRON CLUMP

(No.YA020)1-5
1.3 HANDLING 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.
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 color.
(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 color.
(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 MAIN DIFFERENCE LIST
POWER CORD QMPK300-170-JC QMPG110-170-JC QMPN260-170-JC
Items LT-Z32S2 LT-Z32S2/A LT-Z32S2/S

1-6 (No.YA020)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 FEATURES
2.1.1 FUNCTION / CIRCUITS
• DIST (Digital Image Scaling Technology)
Employs an interpolation method that doubles the scanning lines to realize 480-line flickerfree picture making it especially suitable
for reproducing high-resolution pictures even on large-screen displays.
• DIGITAL VNR
The DIGITAL VNR function cuts down the amount of noise in original picture. There are three function settings of AUTO,MIN and
MAX.
• Super DigiPure
This function uses the latest technology to give viewer a natural looking picture.
It consist of DigiPure and picture motion compensation function.
• COLOUR MANAGEMENT
This function ensures dull colours are compensated to produce natural hues.
2.2 TECHNICAL INFORMATION
2.2.1 LCD PANEL
This unit uses the flat type panel LCD (Liquid Crystal Display) panel that occupies as little space as possible, instead of the
conventional CRT (Cathode Ray Tube), as a display unit.
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.
2.2.1.1 SPECIFICATIONS
The following table shows the specifications of this unit.
2.2.1.2 PIXEL FAULT
There are three pixel faults - bright fault , dark fault and flicker fault - that are respectively defined as follows.
(1) BRIGHT FAULT
In this pixel fault, a cell that should not light originally is lighting on and off.
For checking this pixel fault, input ALL BLACK SCREEN and find out the cell that is lighting on and off.
(2) DARK FAULT
In this pixel fault, a cell that should light originally is not lighting or lighting with the brightness twice as brighter as originally lighting.
For checking this pixel fault, input 100% of each R/G/B colour and find out the cell that is not lighting.
(3) FLICKER FAULT
In the pixel fault, a cell that should light originally or not light originally is flashing on and off.
For checking this pixel fault, input ALL BLACK SCREEN signal or 100% of each RGB colour and find out the cell that is flashing on
and off.
Item Specifications Remarks
Maximum dimensions ( W ×H ×D ) 76.4cm ×46.5cm ×3.8cm
Weight 8.0kg
Effective screen size Diagonal : 80.2cm (H:41.2cm ×V : 68.7cm) 32V type
Aspect ratio 15:9
Drive device/ system a-Si-TFT, active matrix system
Resolution Horizontally 1280 ×Vertically 768 ×RGB <W-XGA> 2949120 dots in total
Pixel pitch (pixel size) Horizontally:0.4425mm, Vertically:0.4425mm
Displayed color 16777216 colors 256 colors for R, G, and B
Brightness 470cd/m2
Contrast ratio 500:1
Response time 13ms
View angle Vertically 170°, horizontally 170°
Surface Polarizer Anti-Glare type
Color Filter Vertical stripe
Backlight Cold cathode fluorescent lamp ×16
Power Supply Voltage in LCD 12V
Power Supply Voltage in Backlight 1290V (rms)

(No.YA020)1-7
2.2.2 MAIN CPU PIN FUNCTION (IC001)
Pin No. Pin Name I/O Remark
1 TCK I Test purpose
2 TMS I Test purpose
3 TDI I Test purpose
4 TDO O Test purpose
5 P2.8 I Remote control input
6 P2.9 I Mechanical power switch detection [Pushing:L]
7 P2.10 I IP error detection [Detection:L]
8 P2.11 O IP reset
9 P2.12 I TV-LINK communication
10 P2.13 I Power ON/OFF [ON:L]
11 P2.14 I Low B protect detection [Detection:L]
12 P2.15 I Power condition check [ON:L]
13 VSS33 I GND
14 VDD33 I 3.3V
15 P4.5 O TV-LINK communication
16 A20 O Memory (Program ROM) address
17 A19 O Memory (Program ROM) address
18 A18 O Memory (Program ROM) address
19 A17 O Memory (Program ROM) address
20 VSS25 I GND
21 VDD25 I 2.5V
22 A16 O Memory (Program ROM) address
23 A8 O Memory (Program ROM) address
24 A7 O Memory (Program ROM) address
25 A9 O Memory (Program ROM) address
26 A6 O Memory (Program ROM) address
27 A5 O Memory (Program ROM) address
28 A10 O Memory (Program ROM) address
29 A11 O Memory (Program ROM) address
30 A12 O Memory (Program ROM) address
31 VSS33 I GND
32 VDD33 I 3.3V
33 A4 O Memory (Program ROM) address
34 A3 O Memory (Program ROM) address
35 A2 O Memory (Program ROM) address
36 A1 O Memory (Program ROM) address
37 A0 O Memory (Program ROM) address
38 A13 O Memory (Program ROM) address
39 RAS/A14 O Memory (Program ROM) address
40 CAS/A15 O Memory (Program ROM) address
41 VSS33 I GND
42 VDD33 I 3.3V
43 MEMCLK O Clock for memory
44 CSSDRAM O Chip select for memory
45 CLKEN O Clock enable for memory
46 CSROM O Chip select for memory
47 RD O Read for memory
48 UDQM O Control IN/OUT buffer of Memory (IC003)
49 LDQM O Control IN/OUT buffer of Memory (IC003)
50 WR O Write for memory
51 D15 I/O Data (Program ROM)
52 VSS33 I GND
53 VDD33 I 3.3V
54 D7 I/O Data (Program ROM)
55 D0 I/O Data (Program ROM)
56 D14 I/O Data (Program ROM)
57 D8 I/O Data (Program ROM)
58 D6 I/O Data (Program ROM)
59 D1 I/O Data (Program ROM)
60 VSS33 I GND
61 VDD33 I 3.3V
62 D13 I/O Data (Program ROM)
63 D9 I/O Data (Program ROM)
64 D5 I/O Data (Program ROM)
65 D2 I/O Data (Program ROM)
66 D12 I/O Data (Program ROM)
67 D10 I/O Data (Program ROM)
68 VSS33 I GND
69 VDD33 I 3.3V
70 D4 I/O Data (Program ROM)
71 D3 I/O Data (Program ROM)
72 D11 I/O Data (Program ROM)
73 RSTIN I Reset
74 P3.0 O I2C CLOCK 0 (for memory)
75 P3.1 I/O I2C DATA 0 (for memory)
76 P3.2 I Remote control input
77 P3.3 I Clock for OSD
78 P3.4 O Tuner system switch
79 P3.5 O Tuner system switch
80 P3.6 I Teletext mode:H
81 P3.7 I Power START
82 P3.8 I Not used
83 P3.9 I Picture mute
84 VSS33 I GND
85 VDD33 I 3.3V
86 VSS25 I GND
87 VDD25 I 2.5V
88 TXD0 O Sub micro computer communication
89 RXD0 I Sub micro computer communication
90 P3.12 I Not used
91 P3.13 I/O Not used
92 P3.15 I/O Not used
93 P5.14(YS2) I Ys for EXT-2
94 P5.15 I Headphone detection [Detection:L]
95 TRIG_IN I/O Not used
96 TRIG_OUT I/O Not used
97 P6.2 I Not used
98 P6.3 O I2C bus clock for IC control
99 P6.4 I/O I2C bus data for IC control
100 P6.5 O Multi-sound process reset
101 P6.6 I/O I2C bus data for IC control
102 VSYNC O Vertical sync for OSD
103 HSYNC O Horizontal sync for OSD
104 COR/RSTOUT O Not used
105 BLANK O Ys for OSD/Teletext
106 VDD33 I 3.3V
107 VSS33 I GND
108 XTAL1 I 6MHz
109 XTAL2 O 6MHz
110 VSSA I GND
111 VDDA I Not used
112 R O R for OSD Teletext
113 G O G for OSD Teletext
114 B I B for OSD Teletext
115 VSSA I GND
116 VDDA I 2.5V
117 CVBS2 I Video for Teletext
118 VSSA I GND
119 VDDA I 2.5V
120 CVBS1B I Video for Teletext
121 CVBS1A I Video for Teletext
122 VSSA I GND
123 VDDA I 2.5V
124 P5.0 I AFT for tuner
125 P5.1(KEY1) I Key scan data 1 [ON:H]
126 P5.2 I AGC for tuner
127 P5.3(KEY2) I Key scan data 2 [ON:H]
128 TMODE I Test purpose
Pin No. Pin Name I/O Remark

1-8 (No.YA020)
2.2.3 SUB CPU PIN FUNCTION (IC7807)
Pin No. Pin name I/O Function
1 (SYSTEM0) I GND
2 (SYSTEM3) I GND
3 AVCC - 5V
4 X2 - Sub clock
5 X1 - Sub clock
6 VCL - Internal down voltage
7 RES I Reset [Reset : L]
8 TEST I Operation test for SUB CPU
9 VSS - GND
10 OSC2 O 10MHz oscillation for system clock
11 OSC1 I 10MHz oscillation for system clock
12 VCC - 5V
13 NC O Not used
14 NC O Not used
15 BL_D2 O Back light 20ms delay for LCD panel [On:L]
16 BL_D1 O Back light 10ms delay for LCD panel [On:L]
17 I2C_STOP O Not used
18 BL_ON O Back light reset for LCD panel [Reset:L]
19 NC O Not used
20 NC O Not used
21 NC O Not used
22 NC O Not used
23 SDA1 I/O I2C bus data (For Sub memory)
24 A.DIM O Not used
25 SCL1 O I2C bus clock (For Sub memory)
26 SDA0 I/O I2C bus data (For general)
27 SCL0 O I2C bus clock (For general)
28 NC O Not used
29 NC O Not used
30 NC O Not used
31 NC O Not used
32 NC O Not used
33 NC O Not used
34 NC O Not used
35 NMI I Port for writing on board [Writning:L]
36 NC O Not used
37 (HD) I Not used
38 NC O Not used
39 (REMO) I Not used
40 NC O Not used
41 P85 -/I Not used
42 P86 - Not used
43 P87 - Not used
44 SCK3 O Port for writing on board
45 RXD I Port for writing on board
46 TXD O Port for writing on board
47 (PROTECTOR0) I Not used
48 NC O Not used
49 RXD2 I Port for communication (Main CPU)
50 TXD2 O Port for communication (Main CPU)
51 NC O Not used
52 (ACTIVE) I Not used
53 VD I Vertical sync
54 (REC_DET) I Not used
55 (PSS) I Not used
56 (ALARM) I Not used
57 (SYSTEM2) I Not used
58 (SYSTEM1) I Not used
59 (PROTECTOR1) I Not used
60 (AMP_PRO2) I Not used
61 (AMP_PRO1) I Not used
62 EE_CDS I Not used
63 (KEY_IN1) I Not used
64 (KEY_IN2) I Not used

(No.YA020)1-9
SECTION 3
DISASSEMBLY
3.1 DISASSEMBLY PROCEDURE
NOTE:
Since this model adopts a layer structure, follow the procedure below in disassembling this model.
Be careful enough not to damage or scratch parts.
3.1.1 REMOVING THE STAND
(1) Remove the 2 screws [A], and remove the STAND
COVER.
(2) Remove the 4 screws [B], and remove the STAND.
3.1.2 REMOVING THE REAR COVER
• Remove the STAND.
(1) Remove the JACK COVER (L/R).
(2) Remove the 7 screws [C], 3 screws [D], and 2 screws [E]
(12 screws in total).
(3) Remove the REAR COVER.
3.1.3 REMOVING THE REGULATOR PWB / COOLING FAN
• Remove the STAND.
• Remove the REAR COVER.
(1) Pull out the wire of COOLING FAN.
(2) Remove the 5 screws [F], and remove the FAN BRACKET.
(3) Remove the 2 screws [Y], and remove the COOLING FAN.
(4) Remove the REGULATOR PWB.
3.1.4 REMOVING THE RECEIVER PWB
• Remove the STAND.
• Remove the REAR COVER.
• Remove the FAN BRACKET.
(1) Remove the 2 screws [G] and 3 screws [H] (5 screws in
total). Then, remove the TERMINAL BASE.
(2) Remove the 6 screws [J], and remove the RECEIVER
PWB.
3.1.5 REMOVING THE FRONT CONTROL PWB CONTROL /
FRONT SENSOR PWB
• Remove the STAND.
• Remove the REAR COVER.
(1) Remove the 2 screws [K], and remove the CONTROL
KNOB.
(2) Remove the 2 screws [L], and remove the FRONT
CONTROL PWB.
(3) Remove the FRONT SENSOR PWB.
3.1.6 REMOVING THE VIDEO PWB / MI-COM & DIST
MODULE PWB
• Remove the STAND.
• Remove the REAR COVER.
• Remove the FAN BRACKET.
(1) Remove the 9 screw [M] and remove the VIDEO PWB
SHIELD.
(2) Remove the 2 screw [N] and remove the JACK BASE.
(3) Remove the 2 screws [P], and remove the VIDEO PWB.
(4) Remove the 3 screws [R], and remove the VIDEO PWB
BRACKET.
(5) Remove the 4 screws [S], and remove the MI-COM & DIST
MODULE PWB form the VIDEO PWB BRACKET.
3.1.7 REMOVING THE POWER PWB
• Remove the STAND.
• Remove the REAR COVER.
• Remove the FAN BRACKET.
• Remove the RECEIVER PWB.
(1) Remove the 4 screws [T], and remove the RECEIVER
PWB BRACKET.
(2) Remove the 1 screw [U], and remove the POWER CORD
HOLDER.
(3) Remove the 5 screws [V], and 1 screw [W] . Then, remove
the POWER PWB.
(4) Remove the 4 screws [X], and remove the CHASSIS
BASE.
3.1.8 REMOVING THE TUNER PWB / MSP PWB
• Remove the STAND.
• Remove the REAR COVER.
(1) Remove the 2 screws [Q], and remove the TUNER PWB
BASE.
(2) Remove the 4 screws [Z], and remove the TUNER PWB
and MSP PWB.

1-10 (No.YA020)
Fig.1
a
c
d
d
e
e
a
b
REAR COVER
POWER
PWB
RECEIVER PWB BRACKET
CHASSIS BASE
A
B
C
E
D
V
V
W
X
T
X
T
T
L
K
JACK COVER
JACK COVER
STAND
STAND COVER
FAN
BRACKET
REGULATOR
PWB
COOLING
FAN
FRONT
CONTROL
PWB
FRONT SENSOR PWB
CONTROL KNOB
c
Y
Y
H
G
J
TERMINAL
BASE
RECEIVER
PWB
U
POWER
CORD
POWER CORD HOLDER
b
VIDEO PWB TUNER PWB
MSP PWB
JACK BASE
TUNER
PWB
BASE
VIDEO PWB
SHIELD
VIDEO PWB
BRACKET
Q
Q
N
R
P
S
F
F
MI-COM & DIST
MODULE PWB
Z
M
M
Z
R
M

(No.YA020)1-11
3.1.9 REMOVING THE SPEAKER
• Remove the STAND.
• Remove the REAR COVER.
(1) Remove the 5 screws [a], and remove the SPEAKER BOX.
(2) Remove the 4 screws [b], and remove the SPEAKER (L /
R).
(3) Remove the 4 screws [c], and remove the DUCT(L/R).
NOTE:
Since the speaker is attached in a certain direction, attach the
speaker in the same correct direction as it has been attached.
3.1.10 REMOVING THE LCD PANEL UNIT
• Remove the STAND.
• Remove the REAR COVER.
• Remove the POWER CORD.
• Remove the RECEIVER.
• Remove the FRONT CONTROL PWB.
• Remove the FRONT SENSOR PWB.
• Remove the VIDEO PWB.
• Remove the DIGITAL INPUT MODULE PWB.
• Remove the MI-COM & DIST MODULE PWB.
• Remove the POWER PWB.
(1) Remove the 3 screws [d], the 2 screws [e] and the 2 screws
[f] (7 screws in total). Then, remove the FRAME(R).
(2) Remove the 3 screws [g], and the 2 screws [h] (4 screws in
total). Then, remove the FRAME (L).
(3) Remove the 3 screws [j]. Then, remove the CENTER
FRAME.
(4) Remove the 2 screws [k] and the 1 screw [m] (3 screws in
total). Then, remove the TOP FRAME.
(5) Remove the 4 screws [n], and the 2 screws [p] (6 screws in
total). Then, remove the BOTTM FRAME.
(6) Remove the 8 screws [r]. Then, remove the TOP
INVERTER UNIT and BOTTOM INVERTER UNIT.
(7) Remove the 1 screw [q]. Then, remove the LCD PANEL
UNIT.
Fig.2
j
d
r
g
k
k
f
e
e
h
h
pp
m
q
n
a
c
b
b
c
f
r
b
b
j
n
TOP FRAME
CENTER FRAME
FRAME(R)
FRAME(L)
BOTTOM FRAME
LCD PANEL
UNIT
SPEAKER BOX
DUCT
SPEAKER
SPEAKER
DUCT
FRONT PANEL
TOP
INVERTER UNIT
BOTTOM
INVERTER UNIT

1-12 (No.YA020)
3.2 REPLACEMENT OF MEMORY IC
This unit uses the nonvolatile memory IC.The memory IC memories data for video and deflection circuits. To replace the memory IC
without the data written, malfunctions might occurred while power is on, and the normal image might not appear. When replacing the
memory IC, be sure to use the IC written with the initial values of data.
3.2.1 PROCEDURE FOR REPLACING THE MEMORY IC
(1) Switch the power off and unplug the power cord from the
wall outlet.
(2) Replacing the memory IC. [Be sure to use the IC written
with the initial values of data]
(3) Plug the power cord into the wall outlet and switch the
power on.
(4) Check and setting of SYSTEM CONSTANT SET
a) Press the [INFORMATION] key and [MUTING] key
on the remote control unit simultaneously.
The SERVICE MENU screen will be displayed. (See
Fig.1)
b) In the SERVICE MENU, press the [INFORMATION]
key and [MUTING] key simultaneously.
Then, the SYSTEM CONSTANT SET screen will be
displayed. (See FIg.2)
c) Check whether the setting value of the SYSTEM
CONSTANT SET is the same as these indicated in
Table 1.
d) Press the [INFORMATION] key twice to return to the
normal screen.
(5) Receive channel setting
Refer to the OPERATING INSTRUCTIONS and set the
receive channels.
(6) User setting
Memories the user setting items.The [USER SETTINGS
OF MENU] setting is as next page.
(7) Setting of SERVICE MENU
Check the setting items in the SERVICE MENU, set if
necessary.For setting method, please refer to the
[ADJUSTMENT PREPARATION] to [ADJUSTMENT
PROCEDURE] of ADJUSTMENT section.
Fig.1
Fig.2
3.2.2 SETTING OF THE SYSTEM CONSTANT SET
Table 1
3.2.3 FACTORY SHIPMENT SETTING
3.2.3.1 USER SETTING OF SWITCHS ON REMOTE CONTROL UNIT
Table 2
SERVICE MENU
1. IF 2. V/C
3. AUDIO 4. DD/CM
5. VSM PRESET 6. STATUS
7. VNR 8. IP
9. SHIPPING (OFF) 0. BUS FREE
1-9 : SELECT i : EXIT
SERVICE MENU SCREEN
SERVICE MENU SCREEN
SYSTEM CONSTANT SET SCREEN
SYSTEM CONSTANT SET SCREEN
SYSTEM CONSTANT SET
1. DESTINATION EURO
-/+ : STORE i : EXIT
OK
Setting item Setting content Setting value
DESTINATION ASIA / EURO ASIA
Setting item Setting value
POWER OFF
CHANNEL PR1
PRESET CHANNEL Refer to OPERATION INSTRUCTIONS
VOLUME 10
ZOOM PANORAMIC
3D SOUND OFF

(No.YA020)1-13
3.2.3.2 USER SETTINGS OF MENU
Table 3
3.2.3.3 VSM PRESET SETTING
Table 4
3.2.3.3.1 SETTING OF VSM PRESET
(1) Enter "5.VSM PRESET" from the SERVICE MENU.
(2) Press the [OK] key to select BRIGHT/STD/SOFT/COOL/NORMAL/WARM mode.
(3) Select the setting item using the [FUNCTION (/)] key.
(4) Set the value using the [FUNCTION (+/-)] key.
(5) Press the [OK] key to memorize the set value.
(6) Press the [INFORMATION] key twice to return to the normal screen.
Setting item Setting value Setting item Setting value
POWER OFF SOUND SETTING
CHANNEL PR1 BASS Centre
TREBLE Centre
PRESET CHANNEL Refer to
OPERATING INSTRUCTIONS
BALANCE Centre
SPEAKER ON
VOLUME 10 BBE ON
PICTURE SETTING 3D SOUND OFF
PICTURE MODE BRIGHT A. H. B ON
COLOUR TEMP. COOL HEADPHONE VOLUME 20
TV SPEAKER OFF
OUTPUT MAIN
PICTURE FEATURES EXT SETTING
DIGITAL VNR AUTO S-IN ---
Super DigiPure AUTO ID LIST ---
COLOUR SYSTEM TV Depends on PR/CH DUBBING EXT-1 →EXT-2
EXT AUTO FEATURES
MOVIE THEATRE AUTO SLEEP TIMER OFF
4:3 AUTO ASPECT PANORAMIC BLUE BACK ON
COLOUR MANAGEMENT ON
CHILD LOCK / CHANNEL GUARD
SET ID NO 0000
PIP POSISION Right below INSTALL
ZOOM PANORAMIC LANGUAGE ENGLISH
AUTO PROGRAM GROUP-1
EDIT/MANUAL Only for preset channels
Item No. Item Variable
range
Setting value
PICTURE MODE COLOUR TEMP.
BRIGHT STD SOFT COOL NORMAL WARM
1CONT -16~16800- - -
2BRIGHT-16~16-400---
3 SHARP -16~16 3 0 -2 - - -
4 COLOUR -16~16 0 0 0 - - -
5TINT -16~16000 - - -
6 B. LIGHT -16~16 16 16 -8 - - -
1 WDR R -64~63 - - - 0 0 0
2 WDR G -64~63 - - - 4 0 -18
3 WDR B -64~63 - - - 22 0 -16

1-14 (No.YA020)
3.2.3.4 SERVICE MENU SETTING ITEMS
Table 5
Setting item Setting value Setting item Setting value
1.IF 1.VCO
2.ATT ON/OFF
6.STATUS (Do not adjust)
2.V/C 1.CUT OF R
2.CUT OF G
3.CUT OF B
4.DRIVE R
5.DRIVE G
6.DRIVE B
7.TWN HI R
8.TWN HI B
9.BRIGHT
10.CONT
11.TWN BRG
12.TWN CNT
13.COLOUR
14.HUE
15.BY GAIN
16.TWN COL
17.TWN TNT
18.B OF MR
19.B OF MB
20.B OF SR
21.B OF SB
22.M BOFST
23.M ROFST
S01 ~ S99
A01 ~ A17
PDA01 ~ PDA12
7.VNR
(Do not adjust)
1.MYLV
2.ONMVF
3.MYCOR
4.MYGA
5.YEGON
6.YEGL
7.YLTL
8.MCLV
9.MCGA
10.MCCOR
11.CLTL
12.YNGA
13.COR_OF
14.LPF_OF
15.YCTL
16.YNCL
17.YNCON
3.AUDIO
(Do not adjust)
1.ERROR LIMIT
2.A2 ID THR
3.Q-PEAK
4.SOUND LEVEL / SOUND SYSTEM B/G
8.IP
(Do not adjust)
PPA001 ~ PPA008
PPB001 ~ PPB036
PPC001 ~ PPC007
ADS001 ~ ADS034
IPA001 ~ IPA120
IPB001 ~ IPB088
IPC001 ~ IPC044
IPD001 ~ IPD058
4.DD/CM DDT01 ~ DDT34
CMT01 ~ CMT57
5.VSM PRESET PICTURE MODE
1.CONT
2.BRIGHT
3.SHARP
4.COLOUR
5.TINT
6.B. LIGHT
COLOUR TEMP.
1.WDR R
2.WDR G
3.WDR B
9.SHIPPING(OFF) (Do not use under the adjustment)

(No.YA020)1-15
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
[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.
(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.
2. How to install Chip parts
[Resistors, capacitors, etc.]
(1) Apply solder to the pattern as indicated in the figure.
(2) Grasp the chip part with tweezers and place it on the
solder. Then heat and melt the solder at both ends of the
chip part.
[Transistors, diodes, variable resistors, etc.]
(1) Apply 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 Aas indicated in the figure.
(4) Then solder leads Band C.
SOLDER SOLDER
A
B
C
A
B
C

1-16 (No.YA020)
SECTION 4
ADJUSTMENT
4.1 ADJUSTMENT PREPARATION
(1) Prior to the following procedure, be sure to connect the
receiver unit and the display unit.
(2) Adjustment of many Majority of the adjustment items for
this unit is performed using the remote control.
(3) However, adjustment of some adjustment items is
performed in the conventional way, i.e. with components
on the boards.
(4) Ensure that the power supply is AC220V.
(5) Allow the set and the measuring devices to run for at least
30 minutes.
(6) Do not alter settings of items/preset values on the service
screen that are not stated in this manual.
(7) Unless otherwise stated in the “ADJUSTMENT
PROCEDURE” section, follow the settings for the features
stated below using the remote control.
4.2 MEASURING INSTRUMENT AND FIXTURES
• DC voltmeter (or Digital voltmeter)
• Oscilloscope
• Signal generator (Pattern generator)
• Remote control unit
Setting item Settings
PICTURE MODE STANDARD
PICTURE adjustment All center (00)
WHITE BALANCE MID
DIGITAL VNR MIN
Super Digi Pure AUTO
PULL DOWN AUTO
COLOUR MANAGEMENT ON
SOUND adjustment All center (00)
BBE OFF
CINEMA SURROUND OFF
AHB OFF
SPEAKER ON
ZOOM FULL

(No.YA020)1-17
4.3 ADJUSTMENT LOCATION & WIRING
J202 J201 J101 J102 J302 J402 J401
TOP
CN0001
A
B
F
G
Y Z
CN000B
CN000W
CN000H
CN00AH CN000X
CN000A CN000J
J1201 J1202
CN000T
CN00AM
CN300T
CN300U
CN3003
PW
CN000K
CN8003
CN1001
POWER PWB
POWER CORD
SPEAKER (L) SPEAKER (R)
RECEIVER PWB
TOP INVERTER UNIT BOTTOM INVERTER UNIT
FRONT CONTROL PWB
FRONT SENSOR PWB
MI-COM & DIST MODULE PWB
REGULATOR PWB
VIDEO PWB
CONTROL PWB
(LCD PANEL UNIT : CN1)
COOLING FAN
P
Q
CN8 CN2 CN7
CN10
CN109
CN106 CN101
CN004CN005
CN004 CN005
MSP PWB
TUNER PWB
AL AM
F
K
J
G
N
U
S
AL
AE
AD
H N
AE
AD AH

1-18 (No.YA020)
4.4 SERVICE MENU SCREEN
SERVICE MENU
V/C
1. CUT OF R
2. V/C
PAL
- / + : STORE i : EXIT
DD/CM PAL
DDT01 0000
4. DD/CM
- / + : STORE i : EXIT
DDT01 ~ DDT34
CMT01 ~ CMT57
IF SERVICE MENU
1. VCO
2. ATT ON/OFF
1-2 : SELECT i : EXIT
SERVICE MENU
1. IF 2. V/C
3. AUDIO 4. DD/CM
5. VSM PRESET 6. STATUS
7. VNR 8. IP
9. SHIPPING (OFF) 0. BUS FREE
1-9 : SELECT i : EXIT
1. ERROR LIMIT
2. A2 ID THR
3. Q
4. SOUND SYSTEM B/G
-PEAK
AUDIO
3. AUDIO
1. ERROR LIMIT 0100
C_AD_BITS =
ERROR LIMIT =
- / + : STORE i : EXIT
1.IF
BRIGHT
STD
SOFT
5. VSM PRESET
VSM PRESET BRIGHT
1.CONT
- / + : STORE i : EXIT
1. CONT
2. BRIGHT
3. SHARP
4. COLOUR
5.
6.
1.
2.
3.
TINT
B.LIGHT
WDR R
WDR G
WDR B
Do not adjust
Do not adjust
OK
6. STATUS
1. SOFT
2. TELETEXT
3. ASPECT
4. IC
5. DEBUG
6. PANEL
7. VNR
1. MYLV
2. ONMVF
3. MYCOR
4. MYGA
5. YEGON
6. YEGL
7. YLTL
8. MCLV
9. MCGA
10. MCCOR
11. CLTL
12. YNGA
13. COR_OF
14. LPF_OF
15. YCTL
16. YNCL
17. YNCON
IP PANOLAMIC PAL
8. IP
- / + : STORE i : EXIT
PPA001 ~ PPA008
PPB001 ~ PPB036
PPC001 ~ PPC007
ADS001 ~ ADS034
IPA001 ~ IPA120
IPB001 ~ IPB088
IPC001 ~ IPC044
IPD001 ~ IPD058
OK
OK
OK
STATUS
1.SOFT
- / + : SELECT i : EXIT
OK
OK
PICTURE MODE
COOL
NORMAL
WARM
WHITE BALANCE
1. CUT OF R
2. CUT OF G
3. CUT OF B
4. DRIVE R
5. DRIVE G
6. DRIVE B
7. TWN HI R
8. TWN HI B
9. BRIGHT
10. CONT
11. TWN BRG
12. TWN CNT
13. COLOUR
14. HUE
15. BY GAIN
16. TWN COL
17. TWN TNT
18. B OF MR
19. B OF MB
20. B OF SR
21. B OF SB
22. M BOFST
23. M ROFST
S01 ~ S99
A01 ~ A17
PDA01 ~ PDA12
VNR LEVEL4
1.MYLV
- / + : STORE i : EXIT
0000
000
000
0000
00000000
0000 PPA001 0000
OK

(No.YA020)1-19
4.5 BASIC OPERATION OF THE SERVICE MENU MODE [USING REMOTE CONTROL UNIT]
4.5.1 TOOLS OF SERVICE MENU OPERATION
Operate the SERVICE MENU with the remote control unit.
4.5.2 HOW TO ENTER THE SERVICE MENU MODE
(1) Press the [INFORMATION] key and the [MUTING] key of
the REMOTE CONTROL UNIT simultaneously, and the
SERVICE MENU screen of Fig.4 will be displayed.
(2) When the Main Menu is displayed, press any key of the [1]
to [0] key to enter the corresponding menu mode.
*Press any of the [1] to [0] keys before the Service Menu
mode disappears.
(3) Select the service item using the [FUNCTION (/)] key.
(4) Set the value using the [FUNCTION (/)] key.
(5) Press the [OK] key to save the value.
Fig.4
4.5.3 HOW TO EXIT THE SERVICE MENU MODE
Press the [INFORMATION] key to exit the Service Menu mode.
4.5.4 SERVICE CONTROL KEY LAYOUT ON THE REMOTE
CONTROL UNIT
Fig.5
4.5.5 SETTINGS OF THE SERVICE MENUS
1. IF (VCO adjustment, ATT setting)
[Do not adjust]
2. V/C (VIDEO setting)
[Do not change settings of items that are not included in
the "ADJUSTMENT PROCEDURE".]
Sets output data to the video circuit.
• [Function (/)] key
For scrolling up/down the setting items.
• [Function (/)] key
For scrolling up/down the setting values.
3. AUDIO (SOUND setting)
[Do not adjust]
4. DD/CM (Panel picture processing setting)
[Do not change settings of items that are not included in
the "ADJUSTMENT PROCEDURE".]
Sets output data to the deflection circuit.
• [Function (/)] key
For scrolling up/down the setting items.
• [Zoom (red)] key
For switching to the next item.
• [Function (/)] key
For scrolling up/down the setting values.
5. VSM PRESET (PICTURE preset setting)
[Refer to page VSM PRESET SETTING.]
6. STATUS
(The version of software, the aspect, and the state of debug-
ging are displayed. )
[Setting for this item is not required in servicing]
7. VNR (Noise reduction setting)
[Do not adjust]
Sets output data to the digital noise reduction circuit.
8. IP (DIST setting)
[Do not adjust]
Sets output data to the DIST circuit.
9. SHIPPING (OFF)
[Setting for this item is not required in servicing]
10. BUE FREE
[Setting for this item is not required in servicing]
SERVICE MENU SCREEN
SERVICE MENU SCREEN
SERVICE MENU
1. IF 2. V/C
3. AUDIO 4. DD/CM
5. VSM PRESET 6. STATUS
7. VNR 8. IP
9. SHIPPING (OFF) 0. BUS FREE
1-9 : SELECT i : EXIT
INFOMATION
ZOOM
FUNCTION /
OK
1~0
MUTING
FUNCTION /
DDT01... CMT01...
DDT01 CMT01