1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated
or damaged by the short circuit.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
3. After servicing, make the following touch current checks to prevent the customer from being exposed to shock hazards.
4. Always ensure panel TKP0E16001 is correctly replaced before returning to customer (see Fig.1).
Fig. 1
Touch-Current Check
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a measuring network for touch currents between each exposed metallic part on the set and a good earth
ground such as a water pipe, as shown in Fig. 2.
3. Use Leakage Current Tester (Simpson 228 or equivalent) to measure the potential acros s the measuring network.
4. Check each exposed metallic part, and measure the voltage at each point.
5. Reserve the AC plug in the AC outlet and repeat each of the above measure.
6. The potential at any point (TOUCH CURRENT) expressed as voltage U1 and U2, does not exceed the following values:
For a. c.: U1 = 35 V (peak) and U2 = 0.35 V (peak);
For d. c.: U1 = 1.0 V,
Note:
The limit value of U2 = 0.35 V (peak) for a. c. and U1 = 1.0 V for d. c. correspond to the values 0.7 mA (peak) a. c. and
2.0 mA d. c.
The limit value U1 = 35 V (peak) for a. c. correspond to the value 70 mA (peak) a. c. for frequencies greater than 100
kHz.
7. In case a measurement is out of the limits specified, there is a possibility of a shock hazard, and the equipment should
be repaired and rechecked before it is returned to the customer.
Measuring network for TOUCH CURRENTS
COLD
WATER PIPE
(EARTH GROUND)
C
=1500:
R
S
TO
APPLIANCES
EXPOSED
METAL PARTS
Resistance values in ohms (:)
V: Voltmetr or oscilloscope
(r.m.s. or peak reading)
NOTE – Appropriate measures should be taken to obtain the correct value in case of non-sinusoidal waveforms
Input resistance: t1M:
Input capacitance:d200pF
Frequency range: 15Hz to 1MHz and d.c.respectively
R0=500:
Fig. 2
=0.22PF
S
U
1
10k:
0.022PF
U2 (V)
V
3
Prevention of Electrostatic Discharge (ESD) to Electrostatically
Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are
called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect
transistors and semiconductor "chip" components. The following techniques should be used to help reduce the incidence of
component damage caused by electrostatic discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on
your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD
wrist strap, which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge build up or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static (ESD
protected)" can generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you ar e ready to install it.
(Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil
or comparable conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective
material to the chassis or circuit assembly into which the device will be installed.
Caution
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity
(ESD) sufficient to damage an ES device).
IMPORTANT SAFETY NOTICE
There are special components used in this equipment which are important for safety.
These parts are marked by in schematic diagrams, exploded views and replacement parts list. It is essential that
these critical parts should be replaced with manufacturer’s specified parts to prevent shock, fire, or other hazards. Do
not modify the original design without permission of manufacturer.
4
About lead free solder (PbF)
Note: Lead is listed as (Pb) in the periodic table of elements.
In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder.
The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu).
That is Tin (Sn), Silver (Ag) and Copper (Cu) although other types are available.
This model uses Pb Free solder in it’s manufacture due to environmental conservation issues. For service and repair work,
we’d suggest the use of Pb free solder as well, although Pb solder may be used.
PCBs manufactured using lead free solder will have the PbF within a leaf Symbol
stamped on the back of PCB.
Caution
xPb free solder has a higher melting point than standard solder. Typically the melting point is 50 ~ 70 °F (30~40°C)
higher. Please use a high temperature soldering iron and set it to 700 ± 20 °F (370 ± 10 °C).
xPb free solder will tend to splash when heated too high (about 1100 °F or 600 °C).
If you must use Pb solder, please completely remove all of the Pb free solder on the pins or solder area before
applying Pb solder. If this is not practical, be sure to heat the Pb free solder until it melts, before applying Pb solder.
xAfter applying PbF solder to double layered boards, please check the component side for excess solder which may
flow onto the opposite side. (see Fig.3)
Fig.3
Suggested Pb free solder
There are several kinds of Pb free solder available for purchase. This product uses Sn+Ag+Cu (tin, silver, copper) solder.
However, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also be used. (see Fig.4)
Fig.4
5
Service Hints
How to remove the Pedestal assembly
Lay the main unit face down. (see Fig.5)
Fig.5
Remove the 4 fixing screws and the pedestal assembly. (see Fig.6)
SCREWS
How to remove the backcover
Remove the 16 [14] fixing screws. (see Fig.7)
SCREWS
SCREWS
Fig.6
SCREWS
6
Fig.7
Chassis Board Layout
A5–
A5–
KEY CONTROL
K-BOARD
A-BOARD
H-BOARD
B-BOARD
Board Name Function
A-Board Main Board
B-Board Tuner
H-Board AV3 Terminal
Key Control Key Control
K-BoardMains Input, Power Switch
P-Board Power Supply
V-BoardRemote Receiver, LED IR, Bats
Location of Lead Wiring
To find the Part Number of required wire in Replacement Parts List click on the wire name in red box
P-BOARD
V-BOARD
[26´´]
[26´´]
A6 – H2
A6 – H2
A12 – H1
A12 – H1
P3–PAN
CN1
A12
A5 A6
A8–V2
[26´´]
TU001
K1
A13 –P4
A10
A2
A7
SP
SP
K3–P1
A2 –PAN
P2
P3
V2
7
Setting Inspection
Voltage Confirmation
A board Normal mode
Test point Position Voltage Description
Self-check is used to automatically check the bus lines and hexadecimal code of the TV set. To enter Self-Check mode, keep
pressing the STATUS button on the remote control and press the down (-/v) button on the TV set. To exit Self Check,
switch off the TV set at the power button.
If the CCU ports have been checked and found to be incorrect or not located then " - - " will appear in place of "O.K.".
9
Adjustment Method
How to enter Service 1
xSet the Bass to maximum position, set the Treble to minimum position then keep pressing the INDEX button on the
remote control and press the down button (-/v) on the TV set, this will place the TV set into the Service Mode 1.
Key Command
x Press the RED / GREEN buttons to step up / down through the functions.
x Press the YELLOW / BLUE buttons to alter the function values, to alter White Rasters use +/- buttons
x Press the OK button after each adjustment has been made to store the required values.
x To exit the Service Mode, press the "N" button.
Keep adjusting sequence: DVCO, Sub-Contrast, other items.
Item
Sub-Contrast
DVCO
Highlight
Lowlight
Sub-Brightness
White Balance Adjustment
Instrument
x Remote Control
x LCD WB meter (Minolta CA-210 or equivalent)
Condition
x Switch on the TV Set. Enter Service1. Step down to Highlight line and keep the aging time more than 20 minutes.
Procedure
x After aging time above set White Raster No.12 for Highlight and No.4 for Lowlight Press the OK button
to store.
xPut Minolta Sensor to the center of the LCD Panel with 25mm gap between Minolta Sensor and LCD Panel. Adjust "x"
and "y" values by changing Red and Blue values.
x Press OK button to store setting.
Note: All setting values are approximate
High
Low 40064 0064 0064
Setting indication
Sub-Contrast
32
DVCO
63
120410 0410 0410
Sub-Brightness
0
Settings / Special features
Receive a 80% white level Philips Pattern with correct
sound system (B/G, D/K) via aerial input. For Sub-
Contrast alignment press "Blue" button, wait until the
figure colour is changed from red to black colour.
Press the OK.
Receive a 80% white level Philips Pattern via aerial
input. For DVCO alignment press "Blue" button, wait
until the figure colour is changed from red to black
colour. Press the OK.
For correct setting see White Balance Adjustment
Optimum setting.
High12
Low 4
Item Value
Highlight
Lowlight
x
y
x
y
2850r150
2940r150
2860r150
2900r150
10
MAINS IN
K1
JK3600
AV3
H-BOARD
TNP0EH009
A6H2
A12H1
JK3002
AUDIO
V-BOARD
TNP0EV009
V2
A8
A10
5 KEY BUTTON
SP-R
K-BOARD
TNP0EK009
Wiring diagram
P1K3
P4
P2
P-BOARD
TNP0EP009
P3
A13
A7
JK3000
AV1
JK3050
AV2
A-BOARD
TNP0EA009
A2
A1
B1
B2
SERVICE
A5A5
JK5001
HDMI1
JK3001
YUV
JK2300
AUDIO OUT
SP-L
11
LCD-PANEL
B-BOARD
TNP0EA009
JK3001
A
A
A
U
V
L
V
R
L
Y
A5
13
16
423
R
1
13
16
H-BOARD
H1
A12
8
8
AV3 R IN
AV3 L IN
C
Y
R
L
3
1
4
6
4
6
H2
1
3
3
1
1
3
A6
A-BOARD
CVBS OUT
RED/C IN
1520 19
G IN
11
7
B IN
CVBS IN
L IN
R IN
326
L OUT
1
R OUT
AV2 21 PIN SCART
CVBS OUT
Video & Stereo Audio Block Diagram
CVBS IN
R IN
G IN
B IN
L IN
R IN
L OUT
R OUT
19
1 3 2 6 7 11 15 20
AUDIO AMP
IC251
4
SP L
31
IC3300
33
AV1 R OUT32AV1 L OUT
AUDIO AMP
IC252
4
SP R
9
30
AUD_MATRIX
7
AV1 R IN 6AV1 L IN
IC1501
VCT69XYP
91023
8
11
10
V1 AV2 AV3 YUV R IN
V1 AV2 AV3 YUV L IN
1 2 27 28
4
3
YUV R IN
YUV L IN
AV1 R OUT VCTP
AV1 L OUT VCTP
AV1 21 PIN SCART
24
V2 CVBS IN
AV1 R IN
178
190
1
7
IC270
HEDPHONE AMP
3
5
HP L
66-73
B 8Bit data Bus
SPEAKER R
HP R
26
25
27
21
22
MONITOR OUT R
MONITOR OUT L
AV2 B IN
AV2 G IN
AV2 RED/C IN
AV2 CVBS OUT
PR IN
PB IN
179
180
177
176
AV1 G IN
AV1 B IN
172
181
194
174
191
189
195
CVBS IN
AV1 CVBS IN
AV1 CVBS OUT
DATA TO PANEL
Y IN
SIF
31
173
AV3 CVBS IN
184
187
188
SPEAKER L
28
13,14
AM
50-57
58-65
R 8Bit data Bus
G 8Bit data Bus
IC5003
HDMI RECEIVER
8Bit data
AV3 C IN
AV3 Y IN
131110
R
JK3002
L
A1
B1
TUNER CVBS
131110
SIF
AM
A2
TO LCD PANEL
L
JK5001
HDMI
R
JK2300
B-BOARD
TUNER
TU001
ENGF7701GF
12
K3
PC1060
RM1050
,
,
,
,
,
,
,
VSU
C 3,3
,
,
,
,
,
,
,
,
,
,
_
P1
1
3
1
3
LINE
FILTER LF 800
L800
142
LINE
FILTER LF 802
~
3
~
D801
-
P3
K-BOARD
SW 800
F 800
1
K1
4
MAIN IN
P-BOARD
UD24 V
P2
A7
PROTECTION
IC800
7 9 5 3 2 4 1
MAIN PS CONTROL
Q830
SIG24 V
STBY 12 V
12
11
9
9,11,12
SIGNAL 24V
10
8
20-22
10
8
20-22
IC3800
12V STBY
Q3802
D831
D832
12V
T800
12347
141516
13
12
F830
1-5
8
9
10
11
A2
LCD PANEL
26-30
PANEL 5V
PC801
PC800
IC 830
IC3803
IC3802
STBY 3.3V
3V
VSUPAU 8V
VSUPSIF 5V
SUPDIG 3
183336
IC1501
AUDIO VIDEO
PROCESSOR
IC3801
STBY 1.8V
3V
VSUPIO1 3,3V
VSUPDRI 3
77
114
45,75
96
86
124
LCF´S
D5000
3V
SUPDRI 3,3V
AUD24 V
5V
5V MIXED P0
SUPCOM 3,3V
VSUPDIG 3,3V
VSUPIO1 3,3V
VSUPIO3 3
Power Supply Block Diagram
BATS
6
STBY3.3V
V2
3V
3V
SUPVO 3
VSUPFE 3
6
A8
3V
3V
SUPDAC 3
VSUPLVDS 3
HDMI
3.3V
115
V-BOARD
1V8 HD
3V3 HD
B-BOARD
TUNER
TU001
B2
5V
12
4
B1
1
12
4
A1
IC5003
HDMI RECEIVER
5,6,7,13,16,19,26,76,89,109
134
122
22,23,35,74,79,92,94,105,
114,128,139
LCF´S
SUPDIG 1.8V
SUPLVDS 1.8V
SUPFE 1.8V
V
8V
PDA
VSUPFE 1,8V
VSUPLVDS 3,3V
VSUPLVDS 1
142
164
127,133,139,150,156
3V3 PVCC
3V3 XTAL
3V3 AVCC
98
37,55
38,42,46,50,57,61,65,69
Q3803
3.3V HDMI
3V
SUPVO 3,3V
SUPIO3 3
VSUPFE 3,3V
197
192
185
170
169
3V3 REG
99
5V
5V MIXED P0
8V
LCF
3V3 HD
14,9,8,7
8
8
IC5000
1V8 HD
DAC
IC1380
IC5001
EDID EPROM
OP AMP
IC1381
LCF´S
3V3 AVCC
3V3 PVCC
8V
8
IC270
AUDIO 24V
18,5
IC252
UDIO 24V
18,5
IC251
D3807
D3806
LCF
5V
30V12V
3V3 REG
3V3 XTAL
STBY 3,3VSTBY 3,3VSTBY 3,3V 9V
1,6
HP AMP
AUDIO AMP
AUDIO AMP
IC1220
8
2
IC1500
5
IC3300
SWITCH
EPROM
IC1120
RESET
AUD MATRIX
TUNER 5V
LCF
VSUPAU 8V
LCF
8V
D3802
Q1701
9V
5V PANEL 5V
A-BOARD
13
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