Haier HT-2180 User manual

HT-2180
COLOUR TELEVISION
Service Manual
Features
218 programs stored
Ａｕｔｏ－ｃｏｒｒｅｃｔｉｎｇ ｂｌａｃｋ ｂａｌａｎｃｅ
Audio/video input, S-Video input
Haier Group
NO:M-EE-HT-2180-1238 Edition:2003.1.20

1
Contents
1 Contents------------------------------------------------------------------------------------1
2 Product Code illumination and Series Introduction------------------------2
3 Features------------------------------------------------------------------------------------3
4 Safety Precautions---------------------------------------------------------------------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-------------------------------------------------------------------------23
12 Circuit Explanation--------------------------------------------------------------------26
13 Adjustment-------------------------------------------------------------------------------31
14 Exploded View--------------------------------------------------------------------------32
15 List of Parts------------------------------------------------------------------------------33
16 Damageable Parts List---------------------------------------------------------------51
17 Information of Resistors and Capacitors--------------------------------------52
Contents

2
2. Product Code illumination and Series Introduction
H T - 21
80
Product Code illumination and Series Introduction
Haier
Company of Signal processor IC TD: Toshiba
CRT size(unit:inch)
Color television appearance

3
3. Features
MODEL
HT-2180
MODEL
HT-2180
NO. ITEM FUNCTION NO. ITEM FUNCTION
1 Main IC TB1238AN 24 Digital curtain
2 CRT Flat square 25 Slow fading on & off
3 Color system PAL 26 Semitransparent menu
4 Audio system B/G 27 Non-flashing channel changing
5 NO.of channels 218 28 ZOOM
6 OSD language ENGLISH 29 16:9 mode
7
PICTURE
Multi-picture modes 30 Games
8 AV stereo 31 Calendar
9 Super woofer 32 Child-lock
10 Surrounding sound 33 Multi-functional lock
11 Treble/bass boost 34 No-picture listening
12 Left/right balancer 35 Background light
13 NICAM 36 Auto-timer on
14 Multi-audio modes 37 CCD
15 Tone adjuster 38
SOFTWARE
V-CHIP
16 MTS/SAP 39 NO. of built-in speakers 2
17
AUDIO
Auto-volume leveling 40 Audio output power(W) 3
18 AV input 41 Total power input W 70
19 AV output 42 Voltage range V ~90-250
20 DVD terminal 43 Power frequency Hz 50/60
21 S-video jack 44 Time of sleep timer(MINS) 120
22 Headphone socket 45 Net weight(KG) 21.5
23
JACK
SCART socket 46 Gross weight(KG) 25
47 Net dimension(MM) 610×460×490
48 Packaged dimension(MM) 685×540×530
49 Quantity for 20' container
50 Quantity for 40' container
51
PARAMETER
Quantiry for 40' high container
Features

4
4. Safety Precautions
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
Many electrical identify these parts and mechanical parts in this chassis have special safety-related
characteristics! In the Schematic Diagram and Replacement Parts List.
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
5.Warning and Cautions
CAUTION: Before servicing receivers covered by this service manual and its supplements and
addenda, read and follow the SAFETY PRECAUTIONS.
1. When
y
ou clean the TV set, please pull
out the power plu
g
from AC outlet. Don't
clean the cabinet and the screen with
benzene, petrol and other chemicals.
4. To prevent the TV set from firing and
electric shock, don't
make the TV set rain
or moisture.
2. In order to prolon
g
the usin
g
life of the
TV set, please place it on a ventilated
place.
5. Don't open the back cover, otherwise it is
possible to damage the components in the
TV set and harm you.
3. Don't place the
TV set in the
sunshine or near
heat source.
6. When the TV set isn't going to be used
for long time or it is in thunder and
lightening, please pull out the plug from AC
outlet and the antenna plug from the cover
of the TV set.
Explanation on the display tube
Generall
y
, it is not needed to clean the tube surface. However, if necessar
y
,its surface can be
cleaned with a dr
y
cotton cloth after cuttin
g
off the power.Don't use an
y
cleanser. If usin
g
hard
cloth, the tube surface will be damaged.
Warning and Cautions

6
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 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.
Electrostatic ally Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such

7
components are usually called Electrostatic ally 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.)
General Soldering Guidelines
Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that will maintain
tip temperature within the range of 500 oF to 600 oF.
Use an appropriate gauge of RMA resin-core solder composed of 60 parts tin/40 parts lead.
Keep the soldering iron tip clean and well tinned.
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.
Use the following unsoldering technique
a. Allow the soldering iron tip to reach normal temperature. (500 o F to 600o F)
b. Heating the component lead until the solder melts.
Warning and Cautions

8
c. 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.
Use the following unsoldering technique
a. Allow the soldering iron tip to reach normal temperature. (500 o 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.
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
Warning and Cautions
Warning and Cautions

9
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
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
Warning and Cautions

10
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.
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.
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.
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.
Warning and Cautions

11
6. Net dimension
Haier
HT-2180
Net dimension
Front view Side view
b
ack-view

6. Parts and Functions
MENUTV/AVPRO
Power switch button
Infrared sensor window
Power indicator
Pro
g
ramme up/down button
Volume up/down button
TV/AV alternatin
g
button
Menu display button
Parts and Functions

Battery installation and replace-
ment for remote control unit
The remote controller uses two 1.5V AA
batteries. For battery installation and re-
placement are as following.
1.Turn the remote control unit upside
down. Press down the grip of battery
compartment and slide the grip in the di-
rection of the arrow.(figure 2)
2.Install two new batteries, make sure that
battery polarity matches with the (+) (-)
marks inside the battery compartment, o-
therwise it can damage the unit.(figure 3)
Remote Controller Functions
8.Remote Controller Functions
Remote Controller

14
9.Program Diagram
Insert the power plug into the power line socket and insert the antenna plug into the antenna socket
on the rear panel. Press down the power switch of the TV set. The red indicator light goes on. If no
picture appears, press the button on the remote controller. Follow the steps below.
AProgram preset
1) Auto searching and storing program
Press MENU button on the remote controller then use the “ “ key to call up the “tune
program” menu on the screen. Then Press the menu” “ item to select it.Use the “ ” key
to select the bar “auto search program” then press the “ ” to make sure. If you want to
stop ,press the key “ ”.
2) Manual search and fine tune
Press MENU button then use the “ “ key to call up the “tune program” menu on the screen.
Then Press the menu” “ item to select it.Use the “ ” key to select the bar “Manual search
program” then press the “ ” to make sure.
3) Deleting channel number
Press Program up/down buttons to select a channel to skip. Press MENU to call Menu. then
use the “ “ key to call up the “tune program” menu on the screen. Then Press the menu”
“ item to select it.Use the “ ” key to select the bar “Cannal number” then press the “ ” to
make sure. Enter the number that you do not want to see .Then Then select “SKIP” and select
SKIP to ON. Now the program number is deleted. Repeat the above steps and select SKIP to
OFF, the deleted program number can be resumed.
BVolume tuning
Press VOLUME buttons - to increase and + to decrease the volume.
C Personal preference settings
Picture modes
Press SELC PICTURE repeatedly to change among MEMORY 1, MEMORY2,MEMORY3,to chang
the Picture Mode.
Program Diagram

15
10.Maintenance Service and Trouble shooting
1.Factory adjustment information
Operation method: after the appliance is switched on, make the volume value to zero. Then
press VOL- key on the TV set and press the DISP button on remote controller at the same time to
enter the S state. Press DISP button one times and “S” will disappear, Repeat the first step, you
will enter the D mode. Now one “D” is displayed on the TV screen.
Press PRO- and PRO+ buttons to select items for adjustment.
Press VOL- and VOL+ buttons to adjust selected items.
Press the POWER button to switch off the appliance and go back to the normal state.
Maintenance menu (Table 8)
Item Specifications Default Value
Variable
Mark
RCUT RED CUT OFF BALANCE 20 *
GCUT GREEN CUT OFF BALANCE 20 *
BCUT BLUE CUT OFF BALANCE 20 *
GDRV GREEN DRIVE BALANCE 40 *
BDRV BLUE DRIVE BALANCE 40 *
CNTX CONTRAST MAX VALUE 3F
BRTC BRIGHTNESS 48
COLC NTSC COLOUR CENTER VALUE 40
TNTC TINT CENTER VALUE 40
COLP PAL COLOUR CENTER VALUE 20
COLS SECAM COLOUR CENTER VALUE 40
SCNT SUB CONTRAST 0B
CNTC SUB CONTRAST CENTER VALUE 30
CNTN SUB CONTRAST MIN VALUE 00
BRTX SUB BRIGHTNESS MAX VALUE 30
BRTN SUB BRIGHTNESS MIN VALUE 30
COLX SUB COLOUR MAX VALUE 35
COLN SUB COLOUR MIN VALUE 00
TNTX SUB TINT MAX VALUE 28
TNTN SUB TINT MIN VALUE 28
ST3 TV-3.58 SHARPNESS 25
SV3 AV-3.58 SHARPNESS 25
ST4 TV-4.43 SHARPNESS 25
SV4 AV-4.43 SHARPNESS 25
SHPX SHARPNESS MAX VALUE 35
SHPN SHARPNESS MIN VALUE 35
TXCX OSD CONTRAST MAX VALUE 35
RGCN OSD CONTRAST MIN VALUE 25
VM0 VCD DATUM0 0E
VM1 VCD DATUM1 00
HPOS 50Hz HORIZONTAL POSITION 00 *
VP50 50Hz VERTICAL POSITION 00 *
Maintenance Service and Trouble shooting

16
Item Specifications Default Value
Variable
Mark
HIT 50Hz VERTICAL HEIGHT 14 *
HPS 50/60Hz HORIZONTAL POSITION 03 *
VP60 60Hz VERTICAL POSITION 00 *
HITS 50/60Hz VERTICAL HEIGHT 01 *
VLIN 50Hz VERTICAL LINEAR CORRECTION 0C *
VSC VERTICAL S CORRECTION 06 *
VLIS 50/60Hz VERTICAL LINEAR CORRECTION FE *
DPC 50Hz PINCUSHION CORRECTION 00
DPCS 50/60Hz PINCUSHION CORRECTION 00
KEY 50Hz TRAPEZIUM CORRECTION 00
KEYS 50/60Hz TRAPEZIUM CORRECTION 00
WID 50Hz HORIZONTAL WIDTH 00
WIDS 50/60Hz HORIZONTAL WIDTH 00
VCP VERTICAL COMPENSATION 00
CNR CONNER CORRECTION 00
HCP HORIZONTAL COMPENSATION 00
SBY SECAM B-Y 08
SRY SECAM R-Y 08
RAGC RADIO FREQUENCY AGC 23
AFT AUTO FREQUENCY TRACE 15
HAFC HORIZONTAL AUTO FREQUENCY CONTROL 00
V25 25 PERCENT OF VOLUME 25
V50 50 PERCENT OF VOLUME 50
BRTS SUB BRIGHTNESS 00
VM2 SYS 24
MOD0 MODE0 41
MOD1 MODE1 17
MOD2 MODE2 DC
NO SIGNAL LEFT NO SIGNAL LEFT 04 *
NO SIGNAL RIGHT NO SIGNAL RIGHT 70 *
NO SIGNAL DTOP NO SIGNAL DTOP * *
NOSIGNAL DBOTTOM NO SIGNAL DBOTTOM * *
WAIT TIME WAIT TIME 48 *
SELF ROM DATA CHECK SELF 00
SELF VOC VCO CHECK SELF 80
SELF AGC AGC CHECK SELF 80
SELF BRTC BRIGHTNESS CENTER VALUE CHECK SELF 75
SELF CNTC CONTRAST CENTER VALUE CHECK SELF 23
SELF TNTC TINT CENTER VALUE CHECK SELF 00
SELF COL COLOUR CENTER VALUE CHECK SELF 20
OSD OSD POSITION 07
OPT OPTION 07
You can change the DATA with “*” mark when necessary.
Maintenance Service and Trouble shooting

17
Abnormal
N
ormal
1.
N
o raster and no sound
Check the fuse
Check VD503∼VD506 V513 C507
Check loading voltages of 109V 180V
Check if the connector electrode Check if all loadin
g
resistors are normal
Check 12V
9V 5V
Check V552 or CPU
POWER control
circuit
Check D902 V902
and V901
There is breakdown i
n
horizontal circuit and N201
Check switch powe
r
circuit
Check if rectifier diodes
breakdown
Replace the
rectifier diodes
Loading has
breakdown
Normal Abnormal
Normal Abnormal
Abnormal
N
ormal Abnormal
Normal
Abnormal
Normal
Maintenance Service and Trouble

18
Abnormal
Maintenance Service and Trouble shootin
g
Check the horizontal oscillation external
circuit of Z280 N201 and N201
N
ormal
There is
breakdown in
CRT broad
Check circuit
between pin18
pin20 in N201
No raster
Check if G2 voltage on CRT board is normal
Check heater voltage Check the base electrode voltage of V444
2.
Check the voltage betwec
n
b
ace electrode an
d
connector electrode of v411
Check the circui
t
b
etween pin 32 at N210
and H drive grade
Check all
voltages of pins
at X602
The heate
r
resister is
broken.
Check the connecto
r
electrode voltage o
f
V411
There is breakdown in horizontal
drive grade, Check V444 T401
R437
Check if FBT T402
V411or C415 C416 are
leakage of electricity Check if pin 28
voltage 9V a
t
N201 is normal
Rechange ba
d
components o
r
remedy conten
t
circuit.
Check 9V powe
r
No
rm
a
l Abnorma
Normal
Abnormal
N
ormal Abnormal
A
b
n
o
rm
a
l
Yes
No
Lower
Normal
Normal
Abnormal
V411 is rosin joint o
r
b
roken

19
Horizontal bright line
Break R908 , let multimeter preset on R 1K and red meter rod grounding, let blac
k
meter rod tap pin 4 at N402.see if the bright line can wide at instant.
Check if R907 R448 are
rosin joint and the resisto
r
value of R448 changes
larger.
Check the
external circuit o
f
N201 and N201.
Normal
There is breakdown in the vertical outpu
t
grate.
Check if the connector o
f
the deflection yoke is
connected well,and C433is
rosin joint or cutoff, and the
external circuit of N402 an
d
N402.
Check 26V powe
r
circuit.
YES
NO
YES NO
YES
NO
3.
Maintenance Service and Trouble shootin
g