Haier TN201AUV Manual de usuario

HAIER

Color Television

Service Manual

PART # AC-8888-04

HAIER AMERICA TRADING, LLC

www.haieramerica.com

Table Of Contents

Contents 2

TN201AUV/TN131AUV Color TV Receiver

TN201UV Using Manual 6

TN201AUV Alignment 7

WORKING METHOD OF HIGH VOLTAGE PROTECTION CIRCUIT OF

TN201AUV CRT

TN201AUV/TN131AUV Color TV Receiver

Technical Notes

I. General information

TN201AUV 21 inch NTSC-M color TV receiver uses the single main chip

LA76814, which is controlled by 12C bus, and the CPU chip is LC86F3348.

This type of machine provides CCD and V-CHIP function and many other

expended function, and enables high performance on the single PCB motherboard.

II. Major technical data:

1. Frequency compound digital turning;

2. All channel CATV, AIRTV receiving;

Band AIRTV

Channels CATV Channels Channel Range

(MHz)

L 2~6 2~6,A-5~A~3,A-2~B 55.25~127.25

M 7~13 C~KK 133.25~361.25

H 14~69 LL~125 367.25~801.25

3. Preset 125 Channels;

4. NTSC-M system;

5. CCD and V-CHIP function;

6. Built-in AV input socket in the front panel;

7. Full-function infrared remote control;

8. English/ French/Spanish on screen display;

9. Eight background color and foreground color;

10. Direct program selector, program recall, program up/ down (skip programs

which are set 'MEMORY=OFF');

11. Brightness, contrast, tint, sharpness, color and volume 64-steps control

through 12c bus;

12. Timer on/off, sleep off mode, power on/off and blank signal 10-minutes Auto-

off;

13. Mute, blank signal auto-mute, auto-mute for programs which are set

'MEMORY=OFF', and automatic search;

14. Max. Audio output power large than 3w+3w;

15. MTBF lowest limit not large than 20,000 hours;

16. Power input 50/60Hz, 120±20V Ac;

17. Antenna input resistance: 75Ω(non-balanced style);

18. Screen size: 54cm (flat square angle tube);

19. Max. Power consumption: not more than 75W (120V AC/60Hz);

20. Dimensions: 495X460X460.5 (mm);

21. Weight: app. 21Kg.

III Circuit working principle and functions:

1. Integrated circuit chip LA76814

a) This chip was created by SANYO in 1999. It is a NTSC-M system chip

that integrated audio demodulator, filter, trap filter with the brightness

delay line color decoder intermediate frequency filter. It is a highly

integrated chip and yet has a well stability thus it requires less outer

components for a color TV receiver. It also has the advance functions

of LA7687 and LA7688. It's a powerful chip and could be used in a

wide range of circuits.

b) This chip can accomplish the following tasks: graphic audio

intermediate frequency amplifying, graphic demodulation, accompany

audio intermediate frequency amplifying, graphic demodulation, video

amplifying, color decoding and work as a frame and line pulsate.

Graphic demodulation, accompany audio demodulation, and color

decoding are done with PLL phase lock demodulation, thus raised the

stability and reliability with great scale and black level extension

function. Bus geometry graphic regulation and 12C bus control

function is added to this chip on base of LA7687. The graphic

performance is highly improved.

c) The field output circuit is SANYO LA7840 frame output circuit chip,

which is specially designed for bus-controlled color TV Receiver. The

advantage of this chip is a large output current with less outer

component required. The retrace is done under the pump function of

power supply. Through connecting with LA76814, it can accomplish the

frame range, frame center, frame linear and frame S regulation

controlled under 12C bus.

2. The power supply system of this model is a frequenting floating parallel switch

voltage stabilizer circuit. It can carry out pulsate and switch output function.

The circuit is a simple and stable one with a thorough protection system.

In order to maintain a stable output voltage and to raise the power reaction

speed, the circuit opts a feed voltage stabilizing control system-pick the main

power supply and test it with a highly sensitive stabilizing test circuit and send

the test result back. Then through the optical-electronic coupling, to the

pilaster circuit and finally works to decide the on/off of the switch regulator

tube after it has been regulated and amplified.

It's an efficient way to get a fine control and a fast power supply reaction and

the stability of the output voltage also improved. Further more, using the optical-

electronic coupling in handling the DC feedback Signal is a safe function for it

separates the primary and secondary output.

2. The video amplifying output circuit incorporates a simple but efficient wide

band amplifying circuit with a wide frequency band and high gain (RGB output

range is beyond 100Vp-p). You can adjust the vertical and horizontal

character during the compensation procedure of the amplifier’s range

frequency character by adjusting the resistor parallel and series to the

capacitance to ensure a proper compensation.

3. The audio signal, after demodulated by LA76814, is switched with the outer

audio Input signal through the audio switch output from the 1st pin. This

machine incorporates LA4225A, small, high signal/noise ratio, and high power

output. It can out put audio signal over 3w+3w.

4. CPU adopted for this machine is LC86F3348A, CCD and V-CHIP function

enabled. 248 x 18 ×34 matrix OSD, 8 foregrounds and background color.

The incorporation with al frequency 32.768KHz crystal pilaster and PLL phase

lock technique results in lowest EMI. It can be connected to 3-bus control

chips.

IV. Notes for using the machine

1. Please read and remember the contents of the user's manual and the

warnings on the back cover of TV set carefully before using the machine,

especially the safety instructions.

2. Keep the set away from heaters, ovens or such heating equipment.

3. Keep well ventilated.

4. Away from heavy dust and corrosive gas.

5. Not exposed to rain or mixture.

6. Away from strong magnetic object.

7. Don't move the machine while it's on. Please do it after your have cut off the

power.

8. Remove the outdoor antenna connection during thundering weather.

9. Remove the power plug from the socket for long-term power failure or

absence.

TN201UV Using Manual

Connect the power plug to power socket (AC120V), connect the signal source, press

the power button, the red power indicator comes on. For the following operations,

follow the instructions:

I. Graphic menu

Press 'MENU' to call out the menu, press 'CH+' or 'CH-' to call out 'VIDEO'

subdirectory, select the 'CONTRAST', 'BRIGHT', 'COLOR', 'SHARP', 'TINT'

options, and press 'VOLUME+' or 'VOLUME-' to adjust the above items.

II. Clock menu

Press 'MENU' to call out the menu, press 'CH+' or 'CH-' to call out 'TIME'

subdirectory, select the 'CLOCK', 'ON TIME', 'OFF TIME', 'SLEEP', 'CHANNEL'

Options, set timer on on/off time, sleep mode time and timer on channel.

III. System menu

Press 'MENU' to call out the menu, press 'CH+' or 'CH-' to call out 'SETUP'

subdirectory, select the 'LANGUAGE', RECEPTION AIR', 'AUTO PROGRAM',

'ADD/ DELETE', 'INPUT TV', options, by pressing 'VOL+' and 'VOL-', you can

change the on screen display, receiving method (CATV/AIR), auto program

search, add/delete program and switching between TV and AV input method.

IV. Specialized settings:

Press 'MENU' to call out the menu, press 'CH+' or 'CH-' to call out 'SPECIAL'

subdirectory, select the 'C CAPTION', 'CCON MUTE', 'POWER RESTORE', 'AUTO

TINT', 'MENU OFFSET', MENU B G C' options, use 'VOL+' to change the CCD

method, and decide whether to display the CCD signal when mute, whether

to standby on power connection, whether to use auto tint demodulation, or

you can change the on screen position of the menu and the background color.

V. V-CHIP:

Press 'V-CHIP' to call out the 'V-CHIP' menu, use the 'CH-' to select 'TV

RATING', 'MPAA RATING', 'BLOCK IN', 'OPTION MENU' items, and press

'MENU' to call out the options menu, use 'CH+', 'CH-' 'VOL+', 'VOL-' to

the settings.

VI. Volume

Press 'VOL+' and 'VOL-' to adjust the volume.

VII. Other function keys on the remote controller:

1. 'TV/AV' key, switch between TV and AV method.

2. 'ON/OFF' key, by pressing this key, switch the TV set between standby mode

and on mode.

3. 'RECALL' key, recall the last program, one more operation to return to the

present one

4. 'MUTE' key, mute function key.

VIII. Keys and buttons on the set:

1. 'CH+' and 'CH-', press to select channel;

2. 'VOL+' and 'VOL-', press to adjust volume;

3. 'MENU', press to call out the main menu, use 'CH+', 'CH-', 'VOL+' and 'VOL-'

to set the items within this menu;

4. 'TV/AV' key, switch between TV and AV method.

TN201AUV Alignment

The alignment and test processes should be taken under the standard NTSC-M audio

and video conditions, and there should be V-CHIP and CCD contents in the test

signal.

zIf alignment:

1. Test equipments:

a. 45.75MHz sweep generator

b. AC 120V/60Hz power supply (with short and over current proof)

c. Digital multimode

2. Alignment

a. Connect position pen of digital multimode to 47 pin of N101 on main PCB:

b. Connect 45.75MHz sweep generator to test top between W108 and C110:

c. Connect 120V/60Hz power supply to outlet XS502A.

d. Adjust T101 and make digital multimode display 3.6V.

zAdjusting focusing voltage and raster voltage:

1. Input white field signal, press 'SCAN' key of the alignment remote controller

to turn the raster to a bright line. Adjust the potential regulator of FBT to

turn down the line to just visible, press the 'SCAN' key again.

2. Input digital figure signal (5-circle figure), find and tune the focusing

potential regulator on the FBT to gain the best display effect.

zVertical and horizontal scan adjustment:

1. Input digital figure signal (5-circle figure);

2. Press 'GEO’ key of the alignment remote controller to call out the scan

parameter menu as follows:

OSD DESCRIPTION RANGE REFERENCE

H.PHASE Horizontal phase 0-30 16-17

V.POSI Frame center 0-63 48

V.SIZE Frame range 0-127 80

NO SO POWER OFF Blank signal auto-off Yes/No Yes

V SC Fram s adjustment 0-31 8

VLIN Fram linear adjustment 0-31 10

Note: Use the ‘p+’ and ‘P-‘ to move the cursor to select a certain item; the selected

item is highlighted with red while other unselected remain green. Use ‘V+’ and ‘V-

‘to change the parameter of the selected item.

1. Press the 'PICTURE' key of the alignment remote controller again to save

the change parameter.

II. Factory configuration setting:

Press 'PROD' key to enter the first page of the main menu of factory

configuration. There are 14 items under this menu; there are 6 more items

listed below:

OSD Description Range Reference

CTTST Test control 0-1 0

HFREQ Horizontal frequency 0 0-63 29

VSPUP Field simultaneous sensitivity 0=High, 1=Low 0-1 0

GMODE

Gray mode, 0=100%, 1=50% 0-1 0

V-LIN Fram linear (set in GEO) 0-31 10

RGDEF R.G output compensation 0-1 0

BGSLC B output compensation 0-3 0

AFG&G AFC gain 0=high 1=low 0-1 0

OSCNT OSD signal gain 0-3 2

CBYPS Set the intermediate frequency parameter of

Internal tint band-pass filter

0-1 0

CRB/W Test mode: 0=normal, 1=dark field, 2=bright field

3=cross figure signal

0-3 0

HBLKL Left blanking 0-7 0

HBLKR Right blanking 0-7 0

BSHLD ABL door limit 0-7 3-4

EMABL Emergency ABL remove switch:0=on, 1=off 0-1 0

MDSTP Use brightness to release ABL, 0=off, 1=on 0-1 0

FMLBL FM output accuracy 031 16

BRABL Brightness ABL switch 0=off, 1=on 0-1 1

VDLBL Video demodulation output range 0=small, 1=large 0-7 7

PASSW

V-CHIP function 0=OFF, 1=ON 0-1 1

3. Simulation preset

1) Input color bar signal;

2) Press 'MENU' key, set color, contrast, color saturation, tint at medium

position;

3) Press 'DP' key of the alignment remote controller to call out the menu

which contains the following items:

OSD Description Range Reference

Sub brightness Preset brightness 0-127 60

Contrast Preset contrast 0-27 27

Tint Preset tint 0-77 35

Color Preset color saturation 0-27 14

4) When done, press 'PICTURE' to save the result.

III. Adjust the white level:

1) Press 'GEO' of alignment remote controller, set the item 'NO SD POWER OFF

YES' to 'NO', keep the TV power on for over 30 minutes:

2) Degauss the CRT:

3) Input bright field signal through AV channel:

4) Connect white level test equipment to the set:

5) Press 'W/B' key of the alignment remote controller to call out the following

menu:

OSD Description Range Reference

RD Red stimulate potential 0-127 64

GD Green stimulate potential 0-15 7

BD Blue stimulate potential 0-127 64

RB Red stop potential 0-255 Preset 127,adjust 127

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