Haier 29T9D User manual

Features
zMultiple picture & audio modes
zChild lock, sleep timer
zSurround stereo, treble and bass boost
zProgram scan & program swap
zNoise reduce
zBlack stretch
29T9D
COLOUR TELEVISION
Service Manual
Manual Code: M-PG-BH-29T6B-P-9363 Edition: 2005.07.10
Haier Grou
p

2
Contents
1. Product code illumination and series introduction………….….…..3
2．Features…………………………………………………………….…..…..3
3．Specifications…………………………………………………………..…..4
4．Safety Precaution……………………………………………………….….5
5．Warning and cautions………………………………………………….….6
6．Net Dimension …………………………………………………………….12
7．Parts and Functions………………………………………………………13
8．Remote controller Functions……………………….…………………..14
9．Program Diagram…………………………………………………………15
10. Maintenance Service and Trouble Shooting…………………..……32
11. Circuit Diagram………………………………………………..………....37
12. Circuit Explanation…………………………………………..………….40
13. Adjustment…………………………………………………………..……50
14. Exploded View…………………………………………………….……..53
15. List of Parts…………………………………………………….…………54
16. Damageable Parts List…………………………………………….……71
17. Information of Resistors and Capacitors…………………….……..72
Contents

3
1. Product code illumination and series introduction
29 T 9D - P
CRT catercorner 29 inch (73cm)
Product code illumination and series introduction & Features
2．Features
1) Multiple picture & audio modes
2) Child lock, sleep timer
3) Surround stereo, treble and bass boost
4) Program scan & program swap
5) Noise reduce
6) Black stretch
COMMON flat CRT
CRT catercorner 29 inch (73cm)
Appearance serial
CMOS chip Type

4
3. Specifications
Features
NO. FUNCTION
1 Main IC UOC
2 CRT PURE FLAT
3 Color system PAL
4 Audio system B/G
5 NO.of channels 218
6 OSD language English Arabic
7
PIC
Multi-picture modes YES
8 AV stereo YES
9 Super woofer
10 Surrounding sound YES
11 Treble/bass boost YES
12 Left/right balancer YES
13 NICAM
14 Multi-audio modes YES
15 Tone adjuster YES
16 MTS/SAP
17
AUDIO
Auto-volume leveling Y
18 AV input Y
19 AV output Y
20 DVD terminal Y
21 S-video jack Y
22 Headphone socket
23
JIC
SCART socket
24 Digital curtain
25 Slow fading on & off Y
26 Semitransparent menu Y
27 Non-flshing channel changing Y
28 ZOOM Y
29 16:9 mode Y
30 Games
31 Calendar Y
32 Child-lock Y
33 Multi-functional lock
34 No-picture listening Y
35 Background light
36 Auto-timer on Y
37 CCD
38
SOFTWARE
V-CHIP
NO. FUNCTION
39 NO. of built-in speakers 2
40 Audio output power(W) 5W+5W
41 Total power input（W）150
42 Voltage range（V）110-250V
43 Power frequency（Hz）50/60HZ
44 Time of sleep timer(MINS)
45 Net weight(KG)
46 Gross weight(KG)
47 Net dimension(MM)
48 Packaged dimension(MM)
49 Quantity for 20' container
50 Quantity for 40' container
51
PARAMETER
Quantiry for 40' high container
52 Acquired certificate
53
APPROVAL
Suitable market
* You can choose it or not

5
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

6
5．Warning and Cautions
1. When youclean the TV set, 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.
2. In order to prolong the using life of the
TV set, please place it on a ventilated
place.
5.Don'topenthebackcover,otherwiseitis
possibletodamagethecomponentsinthe
TVsetandharmyou.
3. 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,pleasepullouttheplug fromAC
outlet andtheantenna plugfrom the cover
oftheTVset.
Warnin
g
and Cautions

7
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
Warning and Cautions

8
by this service manual might be equipped.
7. Do not apply AC power to this instrument and/or any of its electrical assemblies
unless 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.
Warning and Cautions

9
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.)
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 500oF to 600oF.
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.(500o F to 600o F)
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.(500o F to 600o 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.
Warning and Cautions

10
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.
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

11
1. Clip each fuse or resistor lead at top of the circuit board hollow stake.
2. Securely crimp the leads of replacement component around notch at stake top.
3. Solder the connections
CAUTION: Maintain original spacing between the replaced component and adjacent
components and the circuit board to prevent excessive component temperatures.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit board will weaken the
adhesive that bonds foil to the circuit board causing the foil to separate from or “lift-off”
the board. The following guidelines and procedures should be followed whenever this
condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections use the following procedure to
install a jumper wire on the copper pattern side of the circuit board.(Use this technique
only on IC connections).
1. Carefully remove the damaged copper pattern with a sharp knife. (Remove only as
much copper as absolutely necessary).
2. Carefully scratch away the solder resist and acrylic coating (if used) from the end of
the remaining copper pattern.
3. Bend a small “U” in one end of a small gauge jumper wire and carefully crimp it
around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away copper pattern and let it
overlap the previously scraped end of the good copper pattern. Solder the
overlapped area and clip off any excess jumper wire.
At other connections
Use the following technique to repair the defective copper pattern at connections other
than IC Pins. This technique involves the installation of a jumper wire on the component
side of the circuit board.
1. Remove the defective copper pattern with a sharp knife.
Remove at least 1/4 inch of copper, to insure that a hazardous condition will not exist
if the jumper wire opens.
2. Trace along the copper pattern from both sides of the pattern break and locate the
nearest component that is directly connected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead of the nearest component on
one side of the pattern break to the lead of the nearest component on the other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so that it does not touch
components or sharp edges.
Warnin
g
and Cautions

12
6．Antenna connection
Net Dimension
Figure 1

13
7．Parts and Funcitions
Parts and Funcitions
Figure 2

14
8．Remote Controller Functions
Remote Controller Functions
Figure 3

15
9. Program Diagram
a. watching tv
MENU
CH+
CH-
VOL- VOL+
MENU
CH+
CH-
VOL- VOL+
123
456
789
0
1
2
How to select TV program
Select the desired program
Select the desired sound
1 Using "Program number" buttons
2 Using the CH+/- buttons
Press the CH+ button to select a channel number in number
direction.
Press the CH- button to select a channel number in number
direction.
increasing
decreasing
Press the VOL / buttons on the remote or the front of the
TV set to adjust the volume level. The range is 0~99. When
the volume buttons are pressed the volume level is
displayed automatically on the TV screen.
-+
If picture colo r is abnormalu
Use the CH+/- buttons to select Colour then the
VOL-/+ buttons to change between Auto,
. Press the EXIT button to save
the setting.
PAL, NTSC,
SECAM and NTSC443
TUNE
If the colour of a channel is abnormal
Usually thisshould beset inthe
Auto position. However if the
colours displayed on thescreen
are incorrect you can manually
select the correct colour system.
When finish remember toturn it
back to auto again so that other
programs will still work correctly.
Toselect thecolour change
optionpress theTUNE button
on the remote control.
TUNE
BAND VHFL
SKIP OFF
PROGRAM 0
SEARCH
FINE TUNE
AUTO SEARCH
COLO R AUTOU
Directlyenter thechannel numberwiththe numeric keypad
on the remote control.
To select channel numbers from10 ~ 99 press [-/--] button
and enter the two digit channel number
Toselect channel numbers from 100 ~ 218 press [-/--] button
twice and enter the 3 digit channel number
Swapfunctionenablesquickswaptothelastwatchedprogram.
A
uto scan function enables automatic successive scanning of all the programs in
memorywith (eachchannelwilllastabout2seconds)."OFF"skipstatus
Program Diagram

16
b.Program swap and auto scan functions
18
A
UTO
BG
MONO
8
A
UTO
BG
MONO
18
A
UTO
BG
MONO
Program swap
3 If you want to return to
channel 18, press the button
again. Through this function,
you can easily change
between the channel you are
using and the channel you
used last time.
Auto program scan
1 If you want to select a
desirable program, you may
scan all the TV programs in
memory. You can simply press
theSCANbutton todothis.The
program numbers will appear
one after another from
beginning to end (each channel
number will last about 2
seconds).
2If youwant to stopthefunction
during auto scanning, simply
presstheSCAN button again.
SWAP
SCAN
1
AUTO
BG
NICAM STEREO
SCAN
2
AUTO
BG
MONO
SCAN
3
AUTO
BG
MONO
SCAN
1
AUTO
BG
NICAM STEREO
Program Diagram

17
c. Full automatic mode
MENU
CH+
CH-
VOL- VOL+
9
1
2
3
6
AUTO SEARCH
VHFL
Automatic search
3 Press the VOL+ button to
ensure automatic search
function operates. All channels
now playing program will be
automatically preset in order .
,
the first program number will
display on the screen.
After the search has finished
TUNE
TUNE
BAND VHFL
SKIP OFF
PROGRAM 0
SEARCH
FINE TUNE
AUTO SEARCH
COLO R AUTOU
TUNE
COLO R AUTO
BAND VHFL
SKIP OFF
PROGRAM 0
SEARCH
FINE TUNE
U
AUTO SEARCH
Display function
Press the CALL button, then
the channel number and the
systems will be displayed on
the screen.
3
AUTO
BG
MONO
CALL
Program Diagram

18
d.Semi-automatic search
MENU
CH+
CH-
VOL- VOL+
1
AUTO
BG
NICAM STEREO
13
4
6
2
Semi-automatic search
4 Press the VOL-/+ buttons to
start searching.
The VOL- down button is used
for lower side program search.
The VOL+ up button is used for
higher side program search.
Repeat this step, till find the
desired channel.
（）
（）
SEARCH
VHFL
TUNE
TUNE
COLO R AUTO
BAND VHFL
SKIP OFF
PROGRAM 0
FINE TUNE
AUTO SEARCH
U
SEARCH
EXIT
In general, after you press the MENU button, the menu
display (PICTURE, SOUND, TIME
ETC.) will automatically disappear within 15
seconds. If you want to eliminate these contents immediately,
please press the EXIT button.
item
, FUNCTION, TUNE,
EXCHANGE,
Program Diagram

19
e. Manual fine tune
MENU
CH+
CH-
VOL- VOL+
MENU
CH+
CH-
VOL- VOL+
1 3
4
5
FINE TUNE
VHFL
2
Manual fine tune
4 Press the VOL-/+ buttons all
through to carry out fine tune,
till the best picture and sound
are obtained.
TUNE
TUNE
COLO R AUTO
BAND VHFL
SKIP OFF
PROGRAM 0
SEARCH
AUTO SEARCH
U
FINE TUNE
1
AUTO
BG
NICAM STEREO
If thepicture and/or sound arepoor,try usingthe FINE
TUNE feature.
Do not usethisfeatureunless
reception is poor.
Program Diagram

20
f. Program skip
MENU
CH+
CH-
VOL- VOL+
MENU
CH+
CH-
VOL- VOL+
4
5
1
3
2
Program skip
The Program skipfeature enablesyou to skip/hide
programs that you donot wishto bedisplayed when
usingthe CH+/- buttons.These channels will still be
displayed bydirectly using the channel number
buttons onthe remote control.
4 Press the VOL-/+ buttons to
turn the SKIP function "ON".
TUNE
TUNE
COLO R AUTO
BAND VHFL
PROGRAM 0
SEARCH
FINE TUNE
AUTO SEARCH
U
SKIP OFF
TUNE
COLO R AUTO
BAND VHFL
PROGRAM 0
SEARCH
FINE TUNE
AUTO SEARCH
U
SKIP ON
1
AUTO
BG
NICAM STEREO
Program Diagram