Sony klv 32s550a сервис мануал

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1-1. Caution Handling of LCD Panel

When installing the LCD Panel, make sure you are grounded with a wrist band.

When installing the LCD Panel on the wall, the panel must be secured using the 4 mounting holes on the rear cover.

1)Do not press the panel or frame edge to avoid the risk of electric shock.

2)Do not scratch or press on the panel with any sharp objects.

3)Do not leave the module in high temperature or in areas of high humidity for an extended period of time.

4)Do not expose the LCD panel to direct sunlight.

5)Avoid contact with water. It may cause short circuit within the module.

6)Disconnect the AC adapter when replacing the backlight (CCFL) or inverter circuit. (High voltage occurs at the inverter circuit at 650Vrms)

7)Always clean the LCD panel with a soft cloth material.

Use care when handling the wires or connectors of the inverter circuit. Damaging the wires may cause a short circuit.

9)Protect the panel from ESD to avoid damaging the electronic circuit (C-MOS).

1-2. Safety Check-Out

After correcting the original service problem, perform the following safety checks before releasing the set to the customer:-

1)Check the area of your repair for unsoldered or poorly soldered connections. Check the entire board surface for solder splashes and bridges.

2)Check the interboard wiring to ensure that no wires are «pinched» or contact high-wattage resistors.

3)Check all control knobs, shields, covers, ground straps and mounting hardware have been replaced. Be absolutely certain you have replaced all the insulators.

4)Look for unauthorized replacement parts, particularly transistors that were installed during a previous repair. Point them out to the customer and recommend their replacement.

5)Look for parts which, though functioning show obvious signs of deterioration. Point them out to the customer and recommend their replacement.

6)Check the line cords for cracks and abrasion. Recommend the replacement of any such line cord to the customer.

7)Check the antenna terminals, metal trim, «metallized» knobs, screws and all other exposed metal parts for AC leakage. Check leakage test as described next.

1-3. Leakage Test

The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis must not exceed 0.5mA (500 microamperes). Leakage current can be measured by any one of the three methods:-

1.A commercial leakage tester such as the SIMPSON 229 or RCA WT-540A. Follow the manufacturers instructions to use those instructions.

2.A battery-operated AC milliampmeter. The DATA PRECISION 245 digital multimeter is suitable for this job.

3.Measuring the voltage drop across a resistor by means of a VOM or battery operated AC voltmeter. The ‘limit’ indication is 0.75V so analog meters must have an accurate low voltage scale. The SIMPSON’S 250 and SANWA SH-63TRD are examples of passive VOMs that are suitable. Nearly all battery operated digital multimeters that have a 2 VAC range are suitable. (see Figure 1.)

To Exposed Metal

Parts on Set

Earth Ground

Figure 1. AC voltmeter to check AC leakage

1-4. WARNING !

SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY SHADING AND MARK ! ON THE EXPLODED VIEWS ARE CRITICAL FOR SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS THAT ARE CRITICAL FOR SAFE OPERATION ARE IDENTIFIED IN THIS MANUAL. FOLLOW THESE PROCEDURES WHENEVER CRITICAL COMPONENTS ARE REPLACED OR IMPROPER OPERATION IS SUSPECTED.

2-1. Overview of Control Buttons

2-2. LED Display Specification

2-4. LED Pattern

When safety shutdown occurs, Standby LED display reports the cause by using the blinking patterns as indicated below.

Example:

The figure above shows LED display when SHUTDOWN is caused by audio failure. It repeats flashing for a specified number of times in 0.3sec/ cycle and has a 2 seconds interval of lighting off. Please note that a 2 seconds interval of lighting off is fixed regardless of abnormal state types.

2-5. Viewing the Service Diagnosis Display

1.While TV on standby mode, press the following sequence on the Remote commander.

display

(if wrong key is pressed or passed 3 seconds during each process, cancel entering the self-diagnosis display.)

2. To Exit, press the <I/1> key.

4-1-5. BT2 Board Removal

8 Main Frame

4-1-6. Speaker and Bracket Removal

4-3-6. Speaker and Bracket Removal

1 One screw

(+PSW M4 X

3 One screw (+BVTP2 4 X 16)

qa Bezel assy

4-3-7. Vesa Frame Removal

1One screw (+PSW M4 X

4-3-8. LCD Panel Bezel Assy Removal

2Harness

with connector

1 Four screws

(+BVTP2 4 X 16) 3 LCD panel

4 Bezel assy

1)Insert Connector Assy 10P to HT1 PWB. Attach HT1 PWB to Light Guide on Bezel.

2)Insert SP Conn Assy 4P to speaker as shown. Attach Sheet Core, C (X1) as shown.

2

For Non-CISPR models

3)Attach Sheet Core, C (X2) to LVDS harness.

4)Attach Sheet Core, C to Connector Assy 14P and LVDS harness.

For CISPR models

3)Attach Tape, Shield followed by Sheet Core, C on to LVDS harness.

4)Insert screw on to earth clamp on LVDS harness.

5)Attach Sheet Core, C to Connector Assy 14P and LVDS harness.

6)Attach Sheet Core, C on to LVDS harness

Non CISPR model

1)Install AC cord holder to AC power cord at specified position as shown.

2)Then install the AC power cord with holder on to under cover.

3)Lastly, dress AC power cord using pin, wire A6101 as shown.

4)Keep the AC power cord away from surrounding parts.

Caution:

1.Ensure that AC power cord is not stressed whilst inserting it into AC cord bracket.

CISPR model

1)Install Ferrite core to AC power cord at specified position as shown.

2)Install AC cord holder to AC power cord at specified position as shown.

3)Attach Sheet Core, E to Ferrite Core and frame bottom.

4)Then install the AC power cord with holder on to under cover.

5)Lastly, dress AC power cord using pin, wire A6101 as shown.

6)Keep the AC power cord away from surrounding parts.

Attach Sheet

Core, E to Ferrite

3

Core.

power cord away from conductive parts.

Left Speaker

1)Insert Connector Assy 10P to HT1 PWB. Attach HT1 PWB to Light Guide on Bezel.

2)Insert SP Conn Assy 4P to speaker as shown. Attach Sheet Core, C (X1) as shown.

Right Speaker

1)Insert Connector Assy 10P to SW unit. Attach SW unit to Bezel and dress with Tape (LCD) (X2).

2)Insert SP Conn Assy to speaker and attach Sheet Core, C as shown.

3)Attach Sheet Core, C to Frame Bottom as shown.

1)Attach Sheet Core, C (X3) to main bracket as shown.

2)Attach Sheet Core, C (X1) to frame bottom as shown.

3)Attach Sheet Core, C (X1) to main bracket as shown.

Dress Conn

Assy 14P and

SP Conn Assy

4P together.

Dress Conn

Assy 10P and

SP Conn Assy

4P together.

Dress SP Conn Assy 4P to the left of this line (edge of

BT2 PWB)

Dress SP Conn Assy 4P using

Sheet Core, C.

1

Attach Sheet Core, C to main bracket (X3).

Dress SP Conn Assy 4P and 2 Conn Assy 10P together using Sheet Core, C to frame bottom.

3

Dress Lead Assy, Earth to main bracket using Sheet Core, C.

1 AC Cord Holder

150 ± 5mm

Caution:

1.Ensure that AC power cord is not stressed whilst inserting it into AC cord bracket.

Caution:

1.Ensure that AC power cord is not stressed whilst inserting it into AC cord bracket.