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Service ManColour LCD
GLPSpecifications
(Informations in brackets [ ] refers to models 26´´)
1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheatedor damaged by the short circuit.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properlyinstalled.
3. After servicing, make the following touch current checks to prevent the customer from being exposed to shock hazards.4. Always ensure panel TKKL5290 is correctly replaced before returning to customer (see Fig.1).
Touch-Current Check1. 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 across 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. and2.0 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 100kHz.
7. In case a measurement is out of the limits specified, there is a possibility of a shock hazard, and the equipment shouldbe repaired and rechecked before it is returned to the customer.
Fig. 2
Fig. 1
3
TOAPPLIANCESEXPOSEDMETAL PARTS
Resistance values in ohms (Ω)
R0=500Ω
RS=500Ω CS=500µF
10kΩ
0.022µFU1
COLDWATER PIPE(EARTH GROUND)
V: Voltmetr or oscilloscope(r.m.s. or peak reading)
Measuring network for TOUCH CURRENTS
Input resistance: ≥ 1MΩInput capacitance: ≤ 200pFFrequency range: 15Hz to 1MHz and d.c.respectively
NOTE – Appropriate measures should be taken to obtain the correct value in case of non-sinusoidal waveforms
U2 (V)
V
Prevention of Electrostatic Discharge (ESD) to ElectrostaticallySensitive (ES) DevicesSome semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly arecalled Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effecttransistors and semiconductor "chip" components. The following techniques should be used to help reduce the incidence ofcomponent damage caused by electrostatic discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD onyour body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESDwrist 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 asaluminum 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 are ready to install it.
(Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foilor comparable conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protectivematerial 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 thebrushing 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).
There are special components used These parts are marked by in schthese critical parts should be replacenot modify the original design withou
IMPORTANT SAFETY NOTICE
in this equipment which are important for safety.ematic diagrams, exploded views and replacement parts list. It is essential thatd with manufacturer’s specified parts to prevent shock, fire, or other hazards. Dot 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 • Pb 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).• Pb 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 beforeapplying Pb solder. If this is not practical, be sure to heat the Pb free solder until it melts, before applying Pb solder.
• After applying PbF solder to double layered boards, please check the component side for excess solder which mayflow onto the opposite side. (see 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.3
Fig.4
5
Service HintsHow to remove the Pedestal assembly
Lay the main unit face down. (see Fig.5)
Remove the 2 fixing screws and hinge cover. (see Fig.6)
Remove the 8 fixing screws and the pedestal assembly. (see Fig.7)
How to remove the backcoverRemove the 2 fixing screws and hinge cover. (see Fig.6
Remove the 16 fixing screws. (see Fig.8)
Carefully remove the backcover and disconnect two AV
Fig.5
Fig.6
Fig.8
SCREWS
)
3 wires. (see Fig.9)
Fig.7
SCREWS
6
SCREWS
Fig.9
Chassis Board Layout
Setting InsVoltage Confi
P-BOARD
V-BOARD
K-BOARD
A-BOARD
B-BOARD
KEY CONTROL
H-BOARD
Board Name FunctionA-Board Main BoardB-Board TunerH-Board AV3 Terminal
Key Control Key ControlK-Board Mains Input, Power SwitchP-Board Power SupplyV-Board Remote Receiver, LED IR, Bats
Self CheckSelf-check is used to automatically check the bus lines and hexadecimal code of the TV set. To enter Self-Check mode, keeppressing 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.".
8
Adjustment MethodHow to enter Service 1• Set 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• Press the RED / GREEN buttons to step up / down through the functions.• Press the YELLOW / BLUE buttons to alter the function values, to alter White Rasters use +/- buttons• Press the OK button after each adjustment has been made to store the required values.• To exit the Service Mode, press the "N" button.
Keep adjusting sequence: DVCO, Sub-Contrast, other items.
Item Setting indicationNote: All setting values are approximate Settings / Special features
Sub-Contrast Sub-Contrast23
Receive a 80% white level Philips Pattern with correctsound system (B/G, D/K) via aerial input. For Sub-
Contrast alignment press "Blue" button, wait until thefigure colour is changed from red to black colour.
Press the OK.
DVCO DVCO4
Receive a 80% white level Philips Pattern via aerialinput. For DVCO alignment press "Blue" button, wait
until the figure colour is changed from red to blackcolour. Press the OK.
HighlightLowlight For correct setting see White Balance Adjustment
Sub-Brightness
White Balance Adju
Instrument• Remote Control• LCD WB meter (Minolt
Condition• Switch on the TV Set. E
Procedure• After aging time above
to store.• Put Minolta Sensor to t
and "y" values by chan• Press OK button to sto
High 12 0415 0410 0425Low 4 0056 0064 0043
Sub-Brightness0 Optimum setting.
stment
a CA-210 or equivalent)
nter Service1. Step down to Highlight line and keep the aging time more than 20 minutes.
set White Raster No.12 for Highlight and No.4 for Lowlight Press the OK button
he center of the LCD Panel with 25mm gap between Minolta CD Panel. Adjust "x"ging Red and Blue values.re setting.
Hig
Lo
9
Sensor and L
High 12Low 4
Item Valuex 0,275±0,005hlight y 0,275±0,005x 0,275±0,005wlight y 0,285±0,005
AV2
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AV2
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8Bit
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8Bit
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AV3
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AV3
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CVB
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AV3
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13 14 184
187
188
26 25
HP LEFTHP RIGHT
2728SP
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172
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173
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1
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R IN 2L IN 6B IN 7
G IN 11R IN 15
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bus
73-6
6
65-5
857
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15 14
190
12 11 178
177
176
10 9 189
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LEF
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RIG
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CVB
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TX0-
TX0+
TX1-
TX1+
TX2-
TX2+
TCLK
-
TCLK
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TX3-
TX3+
21 23 24 22 194
195
39-5
2
58-7
1
88 86 84 85
A-B
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RD
141
140
138
137
135
134
132
131
129
128
TO LCD PANEL
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JK3002
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144-
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HDMI_AUDIO_MUTE
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CLK
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3,3V
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88 H
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VER
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116
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159
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62
HD
MI_
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165
HD
MI_
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166
BA
CK
LIG
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PWM
167
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E 16
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DH
S 17
1
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204
STB
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08
7 PR
OTE
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218 AV1_SLOW
16 FB
HD
MI213 CEC
17 SDA_P1
15 SCL_P1
18 +5V_HDMI_P1
HD
MI113 CEC
17 SDA_P0
15 SCL_P0
18 +5V_HDMI_P0
AV2
21
PIN
SC
AR
T
8 AV2 SLOW
16 FBL1
IC50
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DH
S
1 H
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27 S
DA
3,3V
28 S
CL3
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29 S
DA
3,3V
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31 S
DA
3,3V
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32 S
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DM
I_5V
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34
MU
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T 10
4
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5 SD
A_P
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7
SCL_
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6 SC
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5 SD
A_P
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7
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HD
MI_
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Q50
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A_3
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A_P
1
SCL_
3,3V
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SCL_
P1
Q50
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A_3
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A_P
0
SCL_
3,3V
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SCL_
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Q50
02H
DM
I_H
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5V_P
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5001
HD
MI_
5V_D
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0+5
V_H
DM
I_P0
HD
EN
HD
HS
HD
VS
SDA
3,3V
SCL3
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SDA
3,3V
_P1
SCL3
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P1
SDA
3,3V
_P0
SCL3
,3V_
P0
D50
32
D50
33H
DM
I_5V
_DET
HD
MI_
5V_D
ET_P
1
HD
MI_
5V_D
ET_P
0
MU
TE_O
UT
HD
MI_
RST
X500
0
HD
MI_
SCD
ET
HD
MI_
INT
Q50
08
Q50
07
HD
MI m
ute
Q50
11
Q50
12
EDID
_WP_
DIS
AB
LE
HD
MI_
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ET
HD
MI_
AU
DIO
_MU
TE
HD
MI_
MU
TE
MU
TE_O
UT
Q12
05
HD
MI_
5V_D
ET
Q17
01LC
D P
AN
EL 5
V
PRO
TEC
TIO
N
Q17
00
HD
VS
HD
EN
HC
LK
SDA
3,3V
SCL3
,3V
SDA
3,3V
SCL3
,3V
CEC
_3,3
V
88
10SC
L_TU
NER
SDA
_TU
NER
SCL_
TUN
ER
Q95
2IN
V_O
FF
Q12
17N
OT_
STB
Y
INV_
PSU
_ON
HD
MI_
INT
HD
MI_
RST
HD
MI_
SMU
TE_I
NH
IBIT
Q13
80
STB
Y_LE
D
BU
S_R
EQU
EST
AV_
LIN
K_I
N
AV_
LIN
K_O
UT
HD
HS
SER
VIC
E
BA
CK
LIG
HT_
PWM
HD
MI_
HPD
_P1
HD
MI_
HPD
_P0
KEY
SCA
N
AV1
_SLO
W
AV1
_FB
L
Q12
13
55
BU
S_R
EQU
EST
BU
S_R
EQU
EST
BA
CK
LIG
HT_
PWM
PWM
_OU
T
EDID
_WP_
DIS
AB
LE
IC12
2074
HC
4053
D
4 A
V_LI
NK
_IN
1 SC
L3,3
V
14 S
DA
3,3V
12 E
EPR
OM
_SD
A
10,1
1 SE
RVI
CE
5 A
V2_S
CL
9 A
V1_I
S_Q
LIN
K
13 A
V1_S
DA
15 A
V1_S
CL
SCL3
,3V
AV_
LIN
K_I
N
SER
VIC
E
AV2
_SC
L
AV1
_IS_
QLI
NK
EEPR
OM
_SD
A
AV1
_SD
A
AV1
_SC
LQ12
19Q
1220
Q12
21
Q12
24
Q12
23
10 AV
12 AV
10 AV2_SCL
AM
P M
ute HDMI_HP_MUTE
AUDIO _MUTE
E 7
IC25
1C
1BB
0000
0998
ENA
BLE
7
HP
Mut
e
HD
MI_
HP_
MU
TE
8V
SCL_
TUN
ER
SDA
_TU
NER
IC33
00TE
A64
22D
TSC
L 27
SDA
28
SCL3,3V
SDA3,3V
NOT_STBY
Q87
93,
3V
POW
ERSU
PPLY
Q87
212
V
Q87
733
V
B2 27 6
SERVICE
BAT
S_O
FF
STB
Y_LE
D IR
KEY
SCA
N
11
INV_
PSU
_ON
D86
3D
862
POW
ER S
UPP
LY 2
4VQ
854
BAT
S_O
FF
AV2
_FB
L
AV1
_FB
L 17
5
AV2
_FB
L 18
3
AU
DIO
_MU
TE 2
05A
UD
IO_M
UTE
IC13
80C
0FB
BK
0000
47D
AC
6 H
DM
I_M
UTE
5 H
DM
I_SM
UTE
_IN
HIB
ITH
DM
I_SM
UTE
_IN
HIB
IT
HD
MI_
MU
TE
IC11
20EA
RO
M
SCL 6
EEPROM_SDA 5
19 HPDT_P1
19 HPDT_P0
PRO
TEC
TIO
NPR
OTE
CTI
ON
33V
3,3V_HDMI
8V5VSTBY1,8V
STBY3,3VQ
1228
AV_
LIN
K_O
UT
SDA
3,3V
160
AV2
_SLO
WA
V2_S
LOW
HC
LK 1
21H
CLK
EDID
_WP_
DIS
AB
LE 1
99
Q17
21
AN
ALO
GM
ULT
IPLE
XER
IC25
2C
1BB
0000
0998
ENA
BL
PIN
SC
AR
T
L1
1_SCL
1_SDA
Parts Location
NOTE:The numbers on the exploded view below refer to the exploded view section of the Replacement Parts List.
6
8
27
24
17
26
19
22
11
18
14
12
4
3
1
25
28
20
10
5
169
15
2
23
21
13
7
27
13
Components Identified by mark have special characteristics important for safety.* When replacing any of these components, use only manufacturers specified parts.In case of ordering these spare parts, please always add the complete Model-Type number to your order.
REPLACEMENT PARTS LIST
Important Safety Notice
DescriptionCct Ref Parts Number DescriptionCct Ref Parts Number
TERMINALS AND LINKSA5 - SP CONNECTORA5-SP TXAJTA5AEOEP3/A4-PANEL P3/A4-PA TXAJTA4AEOE
24
Schematic Diagrams for modelsTX-32LX60F, TX-32LX60P, TX-26LX60F, TX-26LX60P
(GLP21 Chassis)
NOTE
1. RESISTORAll resistors are carbon ¼W resistor, unless marked otherwise.Unit of resistance is OHM (Ω) (k=1,000, M=1,000,000)
2. CAPACITORSAll capacitors are ceramic 50V unless marked otherwise.Unit of capacitance is µF unless otherwise stated.
3. COILUnit of inductance is µH, unless otherwise stated.
4. TEST POINTTest Point Position
5. EARTH SYMBOL
Chassis Earth (Cold)
Line Earth (Hot)
6. VOLTAGE MEASUREMENTVoltage is measured by a D.C. voltmeter.Measurement conditions are as follows:Power source a.c. 220V-240V, 50HzReceiving Signal Colour Bar signal (RF)All customer controls Maximum position
7.
Indicates the Video signal path
Indicates the Audio signal path
These schematic diagrams are the latest at time of printing and are subject to change without notice.
REMARKS
a. Do not touch the hot part, or the hot and cold parts at the same time, as you are liable to a shock hazard.
b. Do not short circuit the hot and cold circuits as electrical components may be damaged.c. Do not connect an instrument, such as an oscilloscope, to the hot and cold circuits simultaneously as this may cause
fuse failure. Connect the earth of the instruments to the earth connection of the circuit being measured.d. Make sure to disconnect the power plug before removing the chassis.
NOTE
1. The Power Supply Circuit contains a circuit area, which uses a separate power supply to isolate the earth connection. The circuit is defined by HOT and COLD indications in the schematic diagram. All circuits, except the Power Circuit, are COLD.
IMPORTANT SAFETY NOTICEComponents identified by mark have special characteristicsimportant for safety. When replacing any of these components, useonly manufacturers' specified parts.
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
CONDUCTOR VIEWS FOR MODELSTX-32LX60F, TX-32LX60P, TX-26LX60F, TX-26LX60P