Haier HTN19R12 Bedienungsanleitung

■Features

 48cm super flat picture tube



Auto search 181 program presetting and memory

 CCD & V-CHIP

HTN19R12/HTN19R12S

COLOUR TELEVISION

Service Manual

MODEL :

HTN19R12/HTN19R12S

(America)

Haier Group

NO:M-MR-AE-HTN19R12-76814

Edition:2004/4/17

CONTENT

1. Contents…………………………………………………………………….1

2. Product code illumination and series introduction…………………2

3．

．．

．Features…………………………………………………………………..3

4．

．．

．Safety Precaution……………………………………………………….4

5．

．．

．Warning and cautions…………………………………………………..5

6．

．．

．Net Dimension…………………………………………………………..11

7．

．．

．Parts and Functions……………………………………………………12

8．

．．

．Remote controller Functions…………………………………………13

9．

．．

．Program Diagram……………………………………………………….14

10. Maintenance Service and Trouble Shooting……………………15

11. Circuit Diagram…………………………………………………………21

12. Circuit Explanation……………………………………………………..24

13. Adjustment……………………………………………………………….31

14. Exploded View…………………………………………………………..33

15. List of Parts………………………………………………………………34

16. Damageable Parts List…………………………………………………49

17. Information of Resistors and Capacitors………………………….50

CONTENT

2. Product code illumination and series introduction

HTN 19 R12

Color television appearance

CRT catercorner 20inch (51cm)

ppearance

serial

Product code illumination and series introduction

BRAND

3. FEATURES

FEATURES

序号

序号序号

序号

FUNCTION

1 Main IC 76814

2 CRT flat picture

3 Color system NTSC3.58

4 Audio system M

5 NO.of channels 181

6 OSD language

ENGLISH、FRENCH SPANISH

PIC

Multi-picture modes

8 AV stereo

9 Super woofer

10 Surrounding sound

11 Treble/bass boost

12 Left/right balancer

13 NICAM

14 Multi-audio modes

15 Tone adjuster

16 MTS/SAP

AUDIO

Auto-volume leveling

18 AV input Y

19 AV output

20 DVD terminal

21 S-video jack

22 Headphone socket Y

JIC

SCART socket

24 Digital curtain

25 Slow fading on & off

26 Semitransparent menu

27 Non-flshing channel changing

28 ZOOM

29 16:9 mode

30 Games

31 Calendar

32 Child-lock

33 Multi-functional lock Y

34 No-picture listening

35 Background light

36 Auto-timer on

37 CCD Y

SOFTWARE

V-CHIP Y

序号

序号序号

序号

FUNCTION

39 NO. of built-in speakers 1

40 Audio output power(W) 2W

41 Total power input（W）70W

42 Voltage range（V）120V

43 Power frequency（Hz）60HZ

44 Time of sleep timer(MINS) 120MIN

45 Net weight(KG) 21

46 Gross weight(KG) 23

47 Net dimension(MM)

48 Packaged dimension(MM)

49 Quantity for 20' container

50 Quantity for 40' container

PARAMETER

Quantiry for 40' high container

52 Acquired certificate

APPROVAL

Suitable market

4. SAFETY PRECAUTIONS

INPORTANT SAFETY NOTICE

These parts are identified by many electrical and mechanical parts in this chassis have

special safety-related characteristics.

It is essential that these special safety parts should be replaced with the same components

as recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.

Do not modify the original design without permission of the manufacturer.

General Guidance

An Isolation Transformer should always be used during the servicing of a receiver whose

chassis is not isolated from the AC power line. Use a transformer of adequate power rating

as this protects the technician from accidents that might result in personal injury caused by

electrical shocks.

It will also protect the receiver and it’s components from being damaged by accidental

shorts of the circuitry that might be inadvertently introduced during the service operation.

If any fuse (or Fusible Resistor) in this TV receiver is blown, replace it with a specified one.

When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1W), keep the

resistor 10mm away from PCB.

Keep wires away from high voltage or high temperature parts.

Due to the high vacuum and large surface area of the picture tube, extreme care should be

taken in handling the Picture Tube. Do not lift the Picture Tube by its Neck.

X-RAY Radiation

Warning:

The source of X-RAY RADIATION in this TV receiver is the High Voltage Section and the

Picture Tube.

For continued X-RAY RADIATION protection, the replacement tube must be of the same

type as specified in the Replacement Parts List.

Before returning the receiver to the customer,

Always perform an AC leakage current check on the exposed metallic parts of the cabinet,

such as antennas, terminals, etc., to make sure that the set is safe to operate without any

danger of electrical shock.

SAFETY PRECAUTIONS

5．

．．

．Warning and Cautions

1.WhenyoucleantheTVset, please pull

out the power plug from AC outlet. Don't

clean the cabinet and the screen with

benzene,petrolandotherchemicals.

4. To prevent the TV set from firing and

electricshock,don't

maketheTVsetrain

ormoisture.

In order to prolong the using life of the

TV set, please place it on a ventilated

place.

5.Don'topenthebackcover,otherwiseitis

possibletodamagethecomponentsinthe

TVsetandharmyou.

Don't place the

TV set in the

sunshine or near

heatsource.

6. When the TV set isn't going to be used

for long time or it is in thunder and

lightening,pleasepullouttheplugfromAC

outlet and theantennaplugfromthecover

oftheTVset.

Warning and Cautions

Figure 1

Explanation on the display tube

Generally, it is not needed to clean the tube surface. However, if necessary, its surface can

be cleaned with a dry cotton cloth after cutting off the power. Don’t use any cleanser. If

using hard cloth, the tube surface will be damaged.

CAUTION: Before servicing receivers covered by this service manual and its

supplements and addenda, read and follow the SAFETY PRECAUTIONS.

NOTE: If unforeseen circumstances create conflict between the following servicing

precautions and any of the safety precautions, always follow the safety precautions.

Remember : Safety First.

General Servicing Precautions

1. Always unplug the receiver AC power cord from the AC power source before:

a. Removing or reinstalling any component, circuit board module or any other

assembly of the receiver.

b. Disconnecting or reconnecting any receiver electrical plug or other electrical

connection.

c. Connecting a test substitute in parallel with an electrolytic capacitor in the receiver.

CAUTION: A wrong substitution part or incorrect installation polarity of electrolytic

capacitors may result in an explosion hazard.

d. Discharging the picture tube anode.

2. Test high voltage only by measuring it with an appropriate high voltage meter or other

voltage-measuring device (DVM, FETVOM, etc.) equipped with a suitable high voltage

probe. Do not test high voltage by “drawing an arc”.

3. Discharge the picture tube anode only by (a) first connecting one end of an insulated

clip lead to the degaussing or kine aquadag grounding system shield at the point where

the picture tube socket ground lead is connected, and then (b) touch the other end of

the insulated clip lead to the picture tube anode button, using an insulating handle to

avoid personal contact with high voltage.

4. Do not spray chemicals on or near this receiver or any of its assemblies.

5. Unless specified otherwise in this service manual, clean electrical contacts only by

applying the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or

comparable nonabrasive applicator; 10% (by volume) Acetone and 90% (by volume)

isopropyl alcohol (90%-99% strength)

CAUTION: This is a flammable mixture.

Unless specified otherwise in this service manual, lubrication of contacts is not required.

6. Do not defeat any plug / socket B+ voltage interlocks with which receivers covered by

this service manual might be equipped.

7. Do not apply AC power to this instrument and/or any of its electrical assemblies unless

Warning and Cautions

all solid-state device heat sinks are correctly installed.

8. Always connect the test receiver ground lead to the receiver chassis ground before

connecting the test receiver positive lead.

Always remove the test receiver ground lead last.

9. Use with this receiver only the test fixtures specified in this service manual.

CAUTION: Do not connect the test fixture ground strap to any heat sink in this receiver.

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid state) devices can be damaged easily by static electricity.

Such components are usually 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 static electricity.

1. Immediately before handling any semiconductor component or semiconductor-

equipped assembly, drain off any electrostatic charge on your body by touching a

known earth ground. Alternatively, obtain and wear a commercially available

discharging wrist strap device, which should be removed to prevent potential shock

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 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 type folder removal device. Some solder removal devices not

classified as “anti-static” can generate electrical charges 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 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 even some normally harmless motions such as mutual brushing of your

clothes’ fabric or lifting of your foot from a carpeted floor might generate static electricity

sufficient to damage an ES device.)

Warning and Cautions

General Soldering Guidelines

1. Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that

will maintain tip temperature within the range of 500

F to 600

2. Use an appropriate gauge of RMA resin-core solder composed of 60 parts tin/40 parts

lead.

3. Keep the soldering iron tip clean and well tinned.

4. Thoroughly clean the surfaces to be soldered. Use a mall wire bristle (0.5 inch, or

1.25cm) brush with a metal handle. Do not use freon-propelled spay-on cleaners.

5. Use the following unsoldering technique

a. Allow the soldering iron tip to reach normal temperature.(500

F to 600

b. Heating the component lead until the solder melts.

c. Quickly draw the melted solder with an anti-static, suction-type solder removal

device with solder braid.

CAUTION: Work quickly to avoid overheating the circuit board printed foil.

6. Use the following unsoldering technique

a. Allow the soldering iron tip to reach normal temperature.(500

F to 600

F )

b. First, hold the soldering iron tip and solder the strand against the component lead

until the solder melts.

c. Quickly move the soldering iron tip to the junction of the component lead and the

printed circuit foil, and hold it there only until the solder flows onto and around both

the component lead and the foil.

CAUTION: Work quickly to avoid overheating the circuit board printed foil.

d. Closely inspect the solder area and remove any excess or splashed solder with a

small wire-bristle brush.

Remove /Replacement

Some chassis circuit boards have slotted holes (oblong) through which the IC leads are

inserted and then bent flat against the circuit foil. When holes are of slotted type, the

following technique should be used to remove and replace the IC. When working with

boards using the familiar round hole, use the standard technique as outlined .

Removal

Desolder and straighten each IC lead in one operation by gently prying up on the lead with

the soldering iron tip as the solder melts.

Draw away the melted solder with an anti-static suction-type solder removal device (or with

solder braid) before removing the IC.

Replacement

Carefully insert the replacement IC in the circuit board.

Warning and Cautions

Carefully bend each IC lead against the circuit foil pad and solder it.

Clean the soldered areas with a small wire-bristle brush.(It is not necessary to reapply

acrylic coating to the areas).

“Small-Signal” Discrete Transistor

Removal/Replacement

Remove the defective transistor by clipping its leads as close as possible to the component

body.

Bend into a “U” shape the end of each of three leads remaining on the circuit board.

Bend into a “U” shape the replacement transistor leads.

Connect the replacement transistor leads to the corresponding leads extending from the

circuit board and crimp the “U” with long nose pliers to insure metal to metal contact then

solder each connection.

Power Output, Transistor Device

Removal/Replacement

Heat and remove all solder from around the transistor leads.

Remove the heat sink mounting screw (if so equipped).

Carefully remove the transistor from the heat sink of the circuit board.

Insert new transistor in the circuit board.

Solder each transistor lead, and clip off excess lead.

Replace heat sink.

Diode Removal/Replacement

Remove defective diode by clipping its leads as close as possible to diode body.

Bend the two remaining leads perpendicularly to the circuit board.

Observing diode polarity, wrap each lead of the new diode round the corresponding lead

on the circuit board.

Securely crimp each connection and solder it.

Inspect (on the circuit board copper side) the solder joints of the two “original” leads. If they

are not shiny, reheat them and if necessary, apply additional solder.

Fuse and Conventional Resistor

Removal/Replacement

Warning and Cautions

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