DOWNLOAD Panasonic TX-20LA60F / TX-20LA60P / TX-20LA6F / TX-20LA6P Service Manual ↓ Size: 7.83 MB | Pages: 36 in PDF or view online for FREE

ORDER NO. PCZ06

10103CE 

Power Source
 

AC 220-240V, 50Hz.

Power Consumption
 

Average use: 41W

 Standby 

condition: 

1W

LCD
 

VGA (640 × 480 pixels)

 

4:3 aspect ratio LCD panel

Screen Size
 

408 mm(W) × 306 mm(H)

Sound
 

 

 

9 cm × 5cm, 2pcs, 4Ω

 

 

4W (2W + 2W), 20% THD

 Headphones
 

 

M3 (3.5 mm) Jack x 1

BAND I: CH2-CH4

 

 BAND II: CH5-CH12

 

UHF HYPER BAND :SI’-S3’, S1-S20

 

 

BAND IV, V : CH21-CH68

PAL-B/G, D/K, SECAM-L/L’, NTSC(AV input only) 

Aerial-Rear
  

UHF/VHF

Operating Conditions
 

 

Temperature: -10°C ~ 40°C

 

 

Humidity: 0%-90% RH (non-condensing)

 

 

21 Pin terminal (Audio/Video in, Audio/Video out, RGB in)

  

 

RCA 

PIN 

Type 

× 

1

 

    Mini DIN 4-pin

 

    RCA PIN Type × 2

 

  498mm(W) × 260mm(D) × 493mm(H)

 

  498mm(W) × 95mm(D) × 451mm(H)

Weight
  

10.9kg 

Net

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

TX-20LA6

TX-20LA60

  

 1.1. 

General 

Guidelines 

 

-------------------------------------- 3

  

 1.2. 

Touch-Current 

Check 

 

------------------------------------ 3

     6.1. Wire dressing  ---------------------------------------------- 8

  

 7.1. 

Stand 

ass´y 

 

------------------------------------------------ 9

  

 7.2. 

Back 

cover 

 

------------------------------------------------- 9

  

 7.3. 

CTRL 

ass´y 

 

-----------------------------------------------10

  

 7.4. 

Power 

Swith 

ass´y 

 

--------------------------------------10

  

 7.5. 

LED 

ass´y 

 

-------------------------------------------------10

     7.6. Headphone ass’y  ----------------------------------------10

     7.7. Speaker (left and right)  --------------------------------- 11

  

 7.8. 

TTL 

ass’y 

--------------------------------------------------- 11

     7.9. Power Module  -------------------------------------------- 11

  

 7.10. 

Main 

ass´y 

 

----------------------------------------------- 11

  

 7.11.Panel 

LCD 

-------------------------------------------------12

      

     8.1. How to enter SERVICE  --------------------------------13

     8.2. How to exit SERVICE  ----------------------------------13

     8.3. Option Description  --------------------------------------14

     9.1. Foil Side  ---------------------------------------------------15

  

 9.2. 

Component 

Side 

 

-----------------------------------------17

     10.1. Schematic Diagram Notes  ---------------------------19

     10.2. Block Diagram  ------------------------------------------20

  

 10.3. 

Schematic 

Diagram 

 

-----------------------------------21

     11.1. Different Part List ---------------------------------------28

  

 11.2. 

Exploded 

View 

 

------------------------------------------29

  

 11.3. 

Stand 

Assy 

Exploded 

View 

 

--------------------------30

     11.4. Packing Exploded Views  -----------------------------30

     11.5. Electrical Replacement Parts List  ------------------31

TX-20LA6

TX-20LA60

 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. 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 Figure 1.

  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 (TOUGH CURRENT) expressed as voltage U1 and U2, does not exceed the following values: 

For a. c.: U

1

 = 35 V (peak) and U

2

 = 0.35 V (peak);

For d. c.: U

1

 = 1.0 V,

   

 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.

TX-20LA6

TX-20LA60

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 almi-

num 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.
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 brush-
ing 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).