Panasonic TC-32LX50, TC-26LX50 Service manual

Specifications

ORDER NO. ITD0503009CE

B05 Canada:B07

LCD Television

TC-32LX50
TC-26LX50

LH48 Chassis

Power Source AC 120 V, 60 Hz
Power Consumption Average use : 121 W (TC-26LX50)

Average use : 147 W (TC-32LX50)
Maximum Current : 2.2 A (TC-26LX50)
Maximum Current : 2.6 A (TC-32LX50)
Stand-by condition : 0.1 W

LCD 1366 × 768 pixels widescreen LCD panel
Screen Size 22.7 “ × 12.8 “ × 26 “ (576 mm × 324 mm × 661 mm) (TC-26LX50)
(W × H × diagonal) 27.5 “ × 15.4 “ × 31.5 “ (698 mm × 392 mm × 800 mm) (TC-32LX50)
Channel Capability VHF-12 : UHF-56 : Cable-125
Sound

Speakers Ø8 cm × 2 pcs, Ø5 cm × 2 pcs
Audio Output 20 W [10 W + 10 W] (10%THD)

Headphones M3 (3.5 mm) Jack × 1
FEATURES 3D Y/C Digital Comb Filter, CLOSED CAPTION, V-Chip
Operating Conditions Temperature : 41 °F - 95 °F (5 °C - 35 °C)

Humidity : 5 % - 90 % RH (non-condensing)

Connection Terminals

INPUT VIDEO (RCA PIN Type ×1) ×3 1.0 Vp-p (75 W)

S-VIDEO (MINI DIN 4pin ×1) ×3 Y : 1.0 Vp-p (75 W),

C : 0.286 Vp-p (75 W)

AUDIO L-R (RCA PIN Type ×2) ×3 0.5 Vrms

COMPONENT Y×2 1.0 Vp-p

VIDEO INPUT (including synchronization)

PB/PR×2 ±0.35 Vp-p
AUDIO L-R (RCA PIN Type ×2) ×1 0.5 Vrms

OUTPUT (PROGRAM OUT) AUDIO L-R (RCA PIN Type 2) ×1 0.5 Vrms, VIDEO (RCA PIN Type ×1) ×1

HDMI HDMI TYPE A Connector ×1

© 2005 Matsushita Electric Industrial Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.

TC-32LX50 / TC-26LX50

AUDIO L-R (RCA PIN Type ×2) ×1 0.5Vrms

Dimensions ( W × H × D )

Including TV Stand 26.1 “ × 21.9 “ × 11.8 “ (663 mm × 556 mm × 299.5 mm) (TC-26LX50)

31.3 “ × 25 “ ×11.8 “ (795 mm × 634.7 mm × 299.5 mm) (TC-32LX50)

TV Set Only 26.1 “ × 19.5 “ ×5.54 “ (663 mm × 494.3 mm × 140.7 mm) (TC-26LX50)

31.3 “ × 22.6 “ ×5.54 “ (795 mm × 573 mm × 140.7 mm) (TC-32LX50)

Mass (Weight) 18 kg (39.6 lb.) NET (TC-26LX50)

21 kg (46.2 lb.) NET (TC-32LX50)

Note:

Design and Specifications are subject to change without notice. Weight and Dimensions shown are approximate.

CONTENTS

Page Page

1 Safety Precautions 4

1.1. General Guidelines

2 Warning

2.1. Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices

2.2. About lead free solder (PbF)

3 Location of Controls and Components
4 Service Mode

4.1. How to enter into adjustment mode

4.2. Cancellation

4.3. Contents of adjustment mode

5 Troubleshooting Guide

5.1. Self-check function

6 Disassembly and Assembly Instructions

6.1. Removing the cable cover

6.2. Removing the pedestal

6.3. Removing the back cover (TC-32LX50)

6.4. Removing the back cover (TC-26LX50)

6.5. Removing the sp box

6.6. Removing the rear AV bracket

6.7. Removing the rear support MTG

6.8. Removing the font bracket and G-Board

6.9. Removing the K-Board and V-Board

6.10. Removing the LVDS metal bracket and DV-DG shield

6.11. Removing the tuner cover, DV-Board, AP-Board, DG­Board, and H-Board

6.12. Removing the power unit

6.13. Removing the chassis

6.14. Removing the LCD panel assｴy and LCD L/R MTG

6.15. Removing the LCD panel and LCD T/B MTG

6.16. Lead Wiring (1)

6.17. Lead Wiring (2)

6.18. Lead Wiring (3)

7 Measurements and Adjustments

10

10
10
10
10
11
11
11
12
12
12

13
13
13
13
14
14
14
14

15

4

4

4
5

6
7

7
7
7

9

9

7.1. Picture level adjustment

7.2. MTS Adjustment

8 Block Diagram

8.1. Block Diagram (1 of 4)

8.2. Block Diagram (2 of 4)

8.3. Block Diagram (3 of 4)

8.4. Block Diagram (4 of 4)

9 Wiring Connection Diagram
10 Sche matic Diagr ams

10.1. Schematic Diagram Notes

10.2. AP-Board (1 of 2) Schematic Diagram

10.3. AP-Board (2 of 2) Schematic Diagram

10.4. H-Board (1 of 3) Schematic Diagram

10.5. H-Board (2 of 3) Schematic Diagram

10.6. H-Board (3 of 3) Schematic Diagram

10.7. DG-Board (1 of 7) Schematic Diagram

10.8. DG-Board (2 of 7) Schematic Diagram

10.9. DG-Board (3 of 7) Schematic Diagram

10.10. DG-Board (4 of 7) Schematic Diagram

10.11. DG-Board (5 of 7) Schematic Diagram

10.12. DG-Board (6 of 7) Schematic Diagram

10.13. DG-Board (7 of 7) Schematic Diagram

10.14. DV-Board Schematic Diagram

10.15. G, K, and V-Board Schematic Diagram

11 Prin ted Circuit Board

11.1. AP-Board

11.2. H-Board

11.3. DG-Board

11.4. G-Board

11.5. DV, K, and V-Board

12 Expl od ed View and Rep la ceme n t Parts List

12.1. Parts Layout

12.2. Front Chassis Layout

12.3. Packing Exploded Views

15
18

21

21
22
23
24

25
27

27
28
29
30
31
32
33
34
35
36
37
38
39
40
41

43

43
45
48
51
52

53

53
54
55

2

12.4. Mechanical Replacement Parts List 56

13 Elect ri cal Parts List

57

13.1. Electrical Parts List Notes

13.2. Electrical Replacement Parts List

TC-32LX50 / TC-26LX50

57
58

3

TC-32LX50 / TC-26LX50

1 Safety Precautions

1.1. General Guidelines

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 leakage current checks to prevent the customer from being exposed to shock hazards.

1.1.1. Leakage Current Cold Check

1. Unplug the AC cord and connect a jumper between the two
prongs on the plug.

2. Measure the resistance value, with an ohmmeter, between
the jumpered AC plug and each exposed metallic cabinet
part on the equipment such as screwheads, connectors,
control shafts, etc. When the exposed metallic part has a
return path to the chassis, the reading should be between
1MW and 5.2MW.

When the exposed metal does not have a return path to the
chassis, the reading must be

Figure 1

.

1.1.2. Leakage Current Hot Check (See
Figure 1.)

1. Plug the AC cord directly into the AC outlet. Do not use an

isolation transformer for this check.

2. Connect a 1.5kW, 10 watts resistor, in parallel with a 0.15µF

capacitors, between each exposed metallic part on the set
and a good earth ground such as a water pipe, as shown in
Figure 1.

3. Use an AC voltmeter, with 1000 ohms/volt or more

sensitivity, to measure the potential across the resistor.

4. Check each exposed metallic part, and measure the

voltage at each point.

5. Reverse the ACplugintheAC outlet andrepeateach of the

above measurements.

6. The potential at any point should not exceed 0.75 volts

RMS. A leakage current tester (Simpson Model 229 or
equivalent) may be used to make the hot checks, leakage
current must not exceed 1/2 milliamp. In case a
measurement is outside 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.

2 Warning

2.1. Prevention of Electro Static 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 electro static 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 alminum

foil, to prevent electrostatic charge buildup 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, alminum 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.

4

TC-32LX50 / TC-26LX50

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 hamless 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).

2.2. 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

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 before applying 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 may flow onto

the opposite side. (see figure below)

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.

stamped on the back of PCB.

5

TC-32LX50 / TC-26LX50

3 Location of Controls and Components

Board Name Function
H-Board AV Switch, Audio, AV connector
V-Board Remote Reciever, LED
K-Board Power switch
AP-Board DC-DC
G-Board Front Terminal
DG-Board MCU, Gobal Core, MEMORY
DV-Board HDMI I/F
Power Unit Power (AC/DC),

None serviceable.
Power Unit should be exchange for service.

6

TC-32LX50 / TC-26LX50

4 Service Mode

4.1. How to enter into adjustment mode

While pressing [VOLUME- ] button of the main unit, press [RECALL] button of the remote control three times in a row (within 2
seconds).

4.1.1. Adjustment method.....Use the remote control.

“1” button...Main items Selection in forward direction
“2” button...Main items Selection in reverse direction
“3” button...Sub items Selection in forward direction
“4” button...Sub items Selection in reverse direction
“VOL” button...Value of sub items change in forward direction (

), in reverse direction ( )

4.2. Cancellation

Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.

4.3. Contents of adjustment mode

· Value is shown as a hexadecimal number.

· Preset value differs depending on models.

· After entering the adjustment mode, take note of the value in each item before starting adjustment.

Main Item Sub item Remarks

MAIN_ADJ PICTURE1

B-Y
R-Y

PCT_ADJ COLOR (Sub-COLOR)

TINT (Sub-TINT)
BRIGHT (Sub-BRT)
BACK-L (Sub-BACKLIGHT)
B-Y-G (B-Y Gain)
R-Y-A (R-Y Angle)

WB_ADJ WHITE WHITE 100% (Not ADJ)

RED RED 100% (Not ADJ)
GREEN GREEN 100% (Not ADJ)
BLUE BLUE 100% (Not ADJ)
H-GRAY WHITE 50% (ADJ)
L-GRAY WHITE 25% (ADJ)
CHECK WHITE 100% (ADJ)
R-GAIN WHITE 100% (ADJ)
G-GAIN WHITE 100% (ADJ)
B-GAIN WHITE 100% (ADJ)
R-CENT WHITE 50% (ADJ)
G-CENT WHITE 50% (ADJ)
B-CENT WHITE 50% (ADJ)

OPTION OPT00

EEPROM COPY ALL or ADJ

RM_SET CODE A or B (Remote Control Code)

7

TC-32LX50 / TC-26LX50

Main Item Sub item Remarks

MTS/HDMI_ADJ MTSIN/WP

SEPAL
SEPAH

8

TC-32LX50 / TC-26LX50

5 Troubleshooting Guide

5.1. Self-check function

When phenomena like "the power fails from time to time" or "the video/audio fails from time to time" can not be confirmed at the
time of servicing, the self-check function can be used to confirm the occurrence and to limit the scope for the defective circuits.Also,
when "the power fails from time to time", display on the screen can be used to confirm the occurrence and to limit the scope for
the defective circuits.

Any programmed channels, channels caption data and some other user defined settings will be erased and return to factory setting.

5.1.1. How to access

5.1.1.1. Access

Produce TV reception screen and, while pressing [VOLUME-] button on the main unit, press [SLEEP] button on the remote
controller unit simultaneously.

5.1.1.2. Exit

When one of the buttons for channel selection etc. is pressed, the display returns to the normal screen.

5.1.2. Screen display

Display Ref No. Description P.C.B
MEMORY IC1106 EEPROM DG-Board
TNR1 TU3001 Tuner H-Board
MTS IC3002 TV sound multiplex decode H-Board
SOUND IC2001 Sound Control H-Board
AVSW-V IC3007 Audio input Switch H-Board
AVSW-A IC3001 Video input Switch H-Board
ADV IC4005 A/D Converter DG-Board
GC4PRO IC4054 Video Processor (GC4PRO) DG-Board
GC4L IC4057 Video Processor (GC4L) DG-Board
HDMI IC5003 HDMI I/F DV-Board

9

TC-32LX50 / TC-26LX50

6 Disassembly and Assembly Instructions

6.1. Removing the cable cover

1. 1. Remove the 2 hooks and 3 claws.

2. 2. Remove the cable cover.

6.3. Removing the back cover (TC­32LX50)

1. Remove the 11 screws.

2. Remove the back cover.

6.4. Removing the back cover (TC­26LX50)

6.2. Removing the pedestal

1. 1. Lay down the unit so that the rear cover faces upward.

2. 2. Remove the 4 screws.

3. 3. Remove the pedestal.

1. Remove the 9 screws.

2. Remove the back cover.

10

6.5. Removing the sp box

1. Remove the 6 screws.

2. Remove the sp box.

TC-32LX50 / TC-26LX50

6.7. Removing the rear support
MTG

1. Remove the 4 screws.

2. Remove the rear support MTG.

6.6. Removing the rear AV bracket

1. Remove the 2 screws.

2. 2. Remove the screw.

3. 3. Remove the rear AV bracket.

11

TC-32LX50 / TC-26LX50

6.8. Removing the font bracket and
G-Board

1. Remove the 2 screws.

2. Disconnect the coupler(G1, G2, and G4).

3. 3. Remove the front bracket assembly.

4. Remove the front bracket and G-Board

6.9. Removing the K-Board and V­Board

1. Remove the 4 screws.

2. Disconnect the coupler (K2 and V1).

3. Remove K-Board, V-Board.

6.10. Removing the LVDS metal
bracket and DV-DG shield

1. Remove the 3 screws.

2. Remove the LVDS metal bracket.

3. Remove the screw.

4. Remove the DV-DG shield.

12

6.11. Removing the tuner cover, DV­Board, AP-Board, DG-Board,
and H-Board

1. Remove the screw.

2. Remove the tuner cover.

3. Remove the 3 screws.

4. Remove the DV-Board.

5. Remove the 15 screws.

6. Disconnect the coupler (AP1-H1, AP2-CN101, AP3-CN201,

AP4-DG4, AP5-DG5, DG2-H2, DG3-H3, DG6-INV and
DG7-PANEL).

7. Remove the AP-Board, DG-Board, and H-Board.

TC-32LX50 / TC-26LX50

6.13. Removing the chassis

1. Remove the 3 screws.

2. Remove the chassis.

6.12. Removing the power unit

1. Remove the 4 screws.

2. Remove the power unit.

6.14. Removing the LCD panel ass´y
and LCD L/R MTG

1. Remove the 4 screws.

2. Remove the LCD panel ass´y and LCD L/R MTG.

13

TC-32LX50 / TC-26LX50

6.15. Removing the LCD panel and
LCD T/B MTG

1. Remove the 4 screws.

2. Remove the LCD panel and LCD T/B MTG.

6.17. Lead Wiring (2)

6.16. Lead Wiring (1)

6.18. Lead Wiring (3)

14

7 Measurements and Adjustments

7.1. Picture level adjustment

7.1.1. NTSC Picture RF

Instrument Name Connect to Remarks

Remote controller
Ex. Signal (Sprit color bar)

1. Receive the sprit color bar.
(Screen mode: ZOOM or FULL Picture mode: DINAMIC AI: OFF AI Picture:OFF)
*BACK LIGHT +30

2. Enter Factory adjustment mode, and select MAIN_ADJ PICTURE.
2-1 Y signal check
Volume UP/DOWN key makes GAIN displayed under PICTURE to set.
Pushing the remote controller “OK” key for about 3 seconds, GAIN is suited tothe adjustment

value automatically.

RF input

Procedure Remarks

TC-32LX50 / TC-26LX50

The Micon changes automatically to the mode
of the following in the adjustment mode.

At the factory trial purposes and pre-production,
the value of YMAX and GAIN are recorded.

15

TC-32LX50 / TC-26LX50

7.1.2. NTSC Picture VBS

Instrument Name Connect to Remarks

Remote controller
Video signal generator

1. Receive the 100% color bar.
(Screen mode: ZOOM or FULL Picture mode: DINAMIC AI: OFF AI Picture:OFF)
*BACK LIGHT +30

2. Enter Factory adjustment mode, and select MAIN_ADJ PICTURE.
2-1 Y signal check
Volume UP/DOWN key makes GAIN displayed under PICTURE to set.
Pushing the remote controller “OK” key for about 3 seconds, GAIN is suited to the

adjustment value automatically.

Video input

Procedure Remarks

The Micon changes automatically to the mode
of the following in the adjustment mode.

At the factory trial purposes and pre-production,
the value of YMAX and GAIN are recorded.

16

7.1.3. Component Picture 1125i input

Instrument Name Connect to Remarks

Remote controller
Video signal generator

1. Receive the 100% color bar.
(Screen mode: ZOOM or FULL Picture mode: DINAMIC AI: OFF AI Picture: OFF)
*BACK LIGHT +30

2. Enter Factory adjustment mode, and select MAIN_ADJ PICTURE.
2-1 Y signal check
Volume UP/DOWN key makes GAIN displayed under PICTURE to set.
Pushing the remote controller “OK” key for about 3 seconds, GAIN is suited to the

adjustment value automatically.

Y, Pb, Pr input

Procedure Remarks

TC-32LX50 / TC-26LX50

The Micon changes automatically to the mode
of the following in the adjustment mode.

At the factory trial purposes and pre-production,
the value of YMAX and GAIN are recorded.

17

TC-32LX50 / TC-26LX50

7.2. MTS Adjustment

7.2.1. Input level adjustment

Instrument Name Connect to Remarks

Filter Jig
RMS voltage meter
RF signal generator

1. Apply following RF at Antenna input.
Video: Flat field, 30% modulation
Audio: 300Hz, 100% modulation, monaural
(70dB ±5dB, 75W OPEN, P/S 10dB)
Note: Make sure 75us Pre -Emphasis is off.

2. Select MTSIN of MTS adjust in factory adjust mode

3. Adjust “MTSIN” data (input level) until RMS voltage meter indicates 106±6mVrms.

Monitor out L
Filter Jig
RF ANT. Input

Procedure Remarks

*Need to min 30 minutes aging.

18

7.2.2. Stereo separation adjustment

Instrument Name Connect to Remarks

Oscilloscope
RF signal generator

1. Select stereo mode in the audio menu.

2. Apply following RF signal at Antenna input.
Video: Flat field, 30% modulation
Audio: 300Hz, 30% modulation, stereo (Left only)
(70dB ±5dB ,75W OPEN ,P/S 10dB)
Note: After setting 30% modulation with P.L. SW
And N.R. SW off, TURN P.L. SW and N.R. SW on.

3. Select SEPAL of MTS Adjust in factory Adjust mode

4. Adjust “SEPAL” data (Low-level separation) until the amplitude

5. Apply following RF signal at Antenna input.
Video: Flat field, 30% modulation
Audio: 3kHz, 30% modulation, stereo (Left only)
(70dB±5dB ,75W OPEN ,P/S 10dB)
Note: After setting 30% modulation with P.L. SW
And N.R. SW off, TURN P.L. SW and N.R. SW on.

6. Select SEPAH of MTS adjust in factory adjust mode

7. Adjust “SEPAH” data (High-level separation) until the the amplitude of the waveform on the
oscilloscope minimum.

8. Repeat steps 2. to 7. until Low-level separation and High-level separations satisfy above­mentioned conditions.

Monitor out R
RF ANT. Input

Procedure Remarks

TC-32LX50 / TC-26LX50

*Need to min 30 minutes aging.
Need to more than 20dB separation at 300Hz

and 3kHz.

19

TC-32LX50 / TC-26LX50

20

8 Block Diagram

8.1. Block Diagram (1 of 4)

A

POWER UNIT

POWER CONTROL

B

+

+

Q105

5

1

3

CN101

C

DC+

TP_1

TP_2

3

7

AP2

5

D7004
RECTIFIER

-+

D

LF7002
LF7003
LF7004

E

23

L.F

1

LINE FILTER

4

IC101

F7001

Q103

Q101

RUSH RELAY

AC RELAY

REMOTE TRANS

Q106

HOT

T7151

SWITCHING TRANS

Q104

PC101

FEED BACK

**

**

P1

2

P2

3

HOT COLD

T101

Q102

IC201

ERROR DET

HOT COLD

RL7001

COLD

RL7002

D7151

S3

9

S2

7

S1

6

D7152

D7153

Q7220

D7161

TC-32LX50 / TC-26LX50

CN3

(INV)

1

4

3

2

CN203

CN201

1

RL201

4
5
6
7

Q201

Q202

D7212

Q7217

D7156

D7154

D7155

AC RELAY

SUB+5V DET

Q7203

AC RELAY

Q7220

D7214

24V_ON

24V
24V
24V
24V

Q7218

AC RELAY

AP-BOARD

AP3

1
4
5
6
7

Q7219

AC RELAY

+18V

Q7301

SOUND+18V ON

MAIN+3.3V/SUB+9V

+24V

+9V

+3.3V

Q7401

MAIN+3.3V ON

IC7301

SOUND+18V/SUB+5V

+5V

24V OVP

D7203

D7204

IC7401

Q7302

SUB+5V ON

Q7402

SUB+9V ON

MIX

D7301

SOUND_VCC OVP

D7303

D7602

D7404

D7403

9V OVP

3.3V OVP

D7401

Q7204-Q7027

O.V.P, DET CIRCUIT

DET:AC RELAY OFF

D7601

5V OVP

D7402

D7304

D7302

D7605

Q7601

BT_30V

D7603

Q7502

MAIN+5V

Q7501

MAIN+5V ON/OFF

H1

AP1

3

UNREG_24V

6

SOUND_17.7V

7

SOUND_17.7V

10

STB_PS

14

D7220

Q7210

+30V(BT)

/+9V(S)

SHORT DET

D7608

D7607

D7606

D7604

Q7208

DC DC ON/OFF

D7206

PANEL_Vcc OVP

D7704

IC7701

PANEL 5V

+5V

Q7701

PANEL 5V ON/OFF

Q7503

MAIN+9V

Q7504

MAIN+9V ON/OFF

Q7212

DC DC ON/OFF

D7703

Q7211

SOS DET

D7208

Q7702

PANEL 5V ON

Q7214

DC DC ON/OFF

Q7508

PANEL 5V ON

16
18
19
20
21
23

AP5

10
11
16
17
18
19
22
23

AP4

12
13
14
20
21
22

2
3
4
7

4
6
7
8

STB_7V
SUB_9V
SUB_5V
ZERO_X_DET
MAIN_9V
MAIN_ON
BT_30V

DG5

SUB_5V
SUB_5V
SUB_5V
STB_7V
24V_ON
PANEL5V_ON
MAIN_ON
SOS_1
AC_ON
ZERO_X_DET
MAIN_5V
MAIN_5V

DG4

MAIN_9V
MAIN_3.3V
MAIN_3.3V
MAIN_3.3V
SUB_9V(PACK)
SUB_9V(PACK)
SUB_9V
PANEL_5V
PANEL_5V
PANEL_5V

1

2

AP10

AC CORD

F

TC-32/26LX50 Block Diagram (1 of 4) TC-32/26LX50 Block Diagram (1 of 4)

134

2 6

5897

21

TC-32LX50 / TC-26LX50

8.2. Block Diagram (2 of 4)

K-BOARD

V-BOARD

Q1004

G:POWER ON

HEADPHONE

Y

C

V

VIDEO3

L

R

JK3801

FRONT TERMINAL

PUSH

SW2801

POWER SW

Q1002

R:STAND-BY

G

R

D1008

POWER LED

RM1001

REMOTE CONTROL SENSOR

3VCC

1

VOUT2GND

G-BOARD

4

G

5
1

R

2

L

3
7
6
9

G

8
1

R

2

L

3
G

S_DET

G

Y-G

Y

Y

C

C

C-G

V-G

V

V

SW

L-G

L

L

R-G

R

R

+

+

C2802

C2801

C.A.T.S. SENSOR

SN1001

JK3002

H-BOARD

REAR TERMINAL

MONITOR OUT

V

V2

V1

COMPONENT2

Component2

COMPONENT1

Component1

MAIN_SW_DET
STB_3.3V
AI_SENSE

REMOTE
KEYSCAN

STB_PS

G_LED
HP_DET
R_LED
HP_LOUT
HP_ROUT
L
S_DET
R
V
Y

SUB 5V
C

L

R

CY

V

L

R

CY

V

L

R

Y

Pb

Pr

L

R

Y

Pb

Pr

L

R

Monitor Out

K2

MAIN_SW_DET

2

STB_PS

3

Video2

Video1

2
4SW3807

3

3

25

6

TV/VTR

SW3803

1

V1

1

G1

R3822

CH

SUB_5VAIREMOTE

235

R3826

SW3806

STB_3.3V

67

CH

G_LED

7

R_LED

R3825

R3823

SW3805

VOL+20VOL-

23

G2

G4

1

2

3

5

7

8

9

10

11

14

18

L

21

S_DET

24

R

25

V

26

Y

SW3804

28

29

C

30

V

L

R
G

C
Y

G
Y-G
C-G

G

V

L

R

G

C

Y

G
Y-G
C-G

G

V

L

R

G

Y

PB

PR

G

L

R

G

Y

PB

PR

G

L

R

G

H4

SW-DET

1

2

AI

3

RM

5

KEY

7

PS

8

LED-G

9

10

11

14

18

21

24

25

26

28

29

30

LED-R

HP-DET

V3-L
V3-S
V3-R
V3-V
V3-Y

V3-C

HP-L
HP-R

D1-PB

D1-PR

MON-V

MON-L

MON-R

V2-C

D2-PB

D2-PR

V2-Y

V1-Y

D2-Y
D2-PB
D2-PR

D1-Y
D1-PB
D1-PR

V1-V
V1-C
V1-S

V2-Y
V2-V
V2-C
V2-S

V3-Y
V3-V
V3-C
V3-S

V2-S

V2-V

V2-L

V2-R

V1-C
V1-Y

V1-S

V1-V

V1-L

V1-R

D2-Y

VIDEO1
Y
V
C
S DET
VIDEO2
Y
V
C
S DET
VIDEO3
Y
V
C
S DET
COMP2
Y
PB
PR
COMP1
Y
PB
PR
TV

TV(V)

V

D2-L

D2-R

D1-Y

D1-L

TV(V)

D1-R

FILTER

DEMODU

MATRIX

TV(L)

IC3007

VIDEO SW

Q3032
Q3034

MAIN

Q3036
V/Y
C/PB
PR

MONITOR

OUT

V

BUFFER

MON-V

PB(M)
PR(M)

Y(M)

MUTE CONTROL

MUTE CONTROL

+9V(S)

S CLOCK0A

S DATA 0A

SCL0A

SDA0A

V1-L
V1-R

V2-L
V2-R

V3-L
V3-R

TU3001

3

2

15

17

14

+5V(M)

TV(R)

SCL0B

10

SDA0B

11

IC3002

MTS

IIC

SDA1

SCL1

Q3039

MAIN+5V

Q3038

MAIN+5V ON/OFF

Q2002

TV(L)
TV(R)

Q2004

D2-L
D2-R

SOUND CONTROL

IC3001

AUDIO SW

D1-L
D1-R

A-HDMI-L
A-HDMI-R

HDMI-L
HDMI-R

IC2001

IC2004

HP AMP

SCL0A
SDA0A

SCL0A

SDA0A

R2089

L
R

Q2012

HP MUTE

VIDEO1

L
R

VIDEO2

L
R

VIDEO3

L
R

TV
L
R

COMP2

L
R

COMP1

R

L
R

L
R

S CLOCK0A
S DATA0A

A-HDMI

HDMI

A-HDMI-L

S CLOCK0A

S DATA0A

AMP

AMP

+5V(M)

A-HDMI-R

+9V(M)

BASS

TREBLE

BALANCE

AI SOUND

ADJUST

AGC

SURROUND

EQ

HP-L
HP-R

HP-DET

L

OUT

R

Q2014

HP DET

(SP MUTE)

1

2
3

4

5

6

MAIN

L

L

R

R

HDMI_R

+9V(S)

MONITOR

OUT

L

R

HDMI_L

MONITOR OUT

Y(M)

PB(M)

Q3027

MUTE(L)

PR(M)

MON-L

MON-R

Q3025

MONITOR OUT

MUTE(R)

Q3029

7

8

9

10

11

AI

RM

KEY

LED-G

LED-R

H2

SW-DET

MAIN-SW

11

6

10 15 24

4

8

133

SRQ

AMUTE

STB_RST

MON-DEF

SP_MUTE

SDA1

SCL1

SDA0A

SCL0A

177 18

14

16

25

19

21

22

AFT

MAIN-ON

DG2

SP_MUTE

STB_RST

A_MUTE

A_MON_DEF

STB_3.3V

SW_OFF_DET

MAIN_SW_DET

AI_SENSE

REMOTE

KEYSCAN

G_LED

R_LED

SRQ

SDA0A

SCL0A

SDA1

SCL1

AMUTE

AFT

SDA0B

SCL0B

MSDA0B

MSCL0B

L

JK3003

HDMI analog

L-GRR-G

25

4

9

H3

7

401

32

30

22

DG3

M S CLOCK0B

HDMI RLS DATA 0B

M S DATA0B

S CLOCK0B

HDMI L

MAIN Y

MAIN PB

MAIN PR

+5V(ADJ)

+5V(ADJ)

AFT

TC-32/26LX50 Block Diagram (2 of 4) TC-32/26LX50 Block Diagram (2 of 4)

1615131210 18171411

22

12

13

14