Akira 14KLS4/CE Bedienungsanleitung

Colour TV

Service Manual

-2-

Model No.: 14KLS4CE

Version: 1.0

Model: 14KLS4/CE

Chassis: LA-76931

-3-

Model No.: 14KLS4CE

Version: 1.0

CONTENTS

SPECIFICATION..................................................................................................................................... 4

IMPORTANT SERVICE SAFETY INFORMATION.............................................................................. 8

ALIGNMENT PROCEDURE.................................................................................................................. 7

SERVICE FLOW CHART ....................................................................................................................... 8

ADJUSTMENT MANUAL ..................................................................................................................... 9

BLOCK DIAGRAM .............................................................................................................................. 13

LA76931................................................................................................................................................. 14

LV1116 ................................................................................................................................................... 17

TDA16846.............................................................................................................................................. 20

LA78040................................................................................................................................................. 23

THE WAVEFORM OF STICKING POINT........................................................................................... 26

CIRCUIT DIAGRAM ............................................................................................................................ 30

PCB BOARD ......................................................................................................................................... 31

-4-

Model No.: 14KLS4CE

Version: 1.0

SPECIFICATION

TVPALD/K,B/G, I

System AV NTSC 4.43/3.58MHz

VHF LOW 49.75～85.25 MHz

VHF HIGH 168.25～216.25MHz

UHF 471.25～863.25 MHz

Channel

CATV 112.25～464.25MHz

Line 625 Line

Horizontal Frequency 15625Hz

Scanning

Vertical 50/60 Hz

Video 38MHz

Sound 31.5/32/32.5 MHz

IF Frequency

Chroma 33.57 MHz

VHF LOW 43 dBμV

VHF HIGH 45 dBμV

UHF 45 dBμV

Sensitivity

CATV 45 dBμV

Audio Output Power 7% THD 4W + 4W

Antenna Impedance 75Ω

60W (14" series)

75W (21" series)

Power Consumption

180W (29" series)

Power Supply AC 110/220/240V 50/60Hz

-5-

Model No.: 14KLS4CE

Version: 1.0

IMPORTANT SERVICE SAFETY INFORMATION

Operating the receiver outside of its cabinet or with its back removed involves a shock hazard. Work

on these models should only be performed by those who are thoroughly familiar with precautions

necessary when working on high voltage equipment.

Exercise care when servicing this chassis with power applied. Many B plus and high voltage RF

terminals are exposed which, if carelessly contacted, can cause serious shock or result in damage to the

chassis. Maintain interconnecting ground lead connections between chassis, escutcheon, picture tube

dag and tuner when operating chassis.

These receivers have a "polarized" AC line cord. The AC plug is designed to fit into standard AC

outlets in one direction only. The wide blade connects to the 'ground side' and the narrow blade

connects to the 'hot side' of the AC line. This assures that the TV receiver is properly grounded to the

house wiring. If an extension cord must be used, make sure it is of the 'polarized' type.

Since the chassis of this receive is connected to one side of the AC supply during operation, service

should not be attempted by anyone not familiar with the precautions necessary when working on these

types of equipment.

When it is necessary to make measurements or tests with AC power applied to the receiver chassis, an

Isolation Transformer must be used as a safety precaution and to prevent possible damage to transistors.

The Isolation Transformer should be connected between the TV line cord plug and the AC power

outlet.

Certain HV failures can increase X-ray radiation. Receivers should not be operated with HV levels

exceeding the specified rating for their chassis type. The maximum operating HV specified for the

chassis used in these receivers is 23.5kV±1.0kV at zero beam current with a liner voltage of 120V AC.

Higher voltage may also increase the possibility of failure in the HV supply.

It is important to maintain specified values of all components in the horizontal and high voltage circuits

and anywhere else in the received that could cause a rise in high voltage, or operating supply voltages.

No changes should be made to the original design of the receiver.

Components shown in the shaded areas on the schematic diagram and/or identified by in the

replacement parts list should be replaced only with exact factory recommended replacement parts. The

use of unauthorized substitute parts man creates may create shock, fire, X-ray radiation, or other

hazards.

-6-

Model No.: 14KLS4CE

Version: 1.0

To determine the presence of high voltage, use accurate high impedance HV meter connected between

the second anode lead and the CRT dag grounding device. When servicing the High Voltage System

remove static charges from it by connecting a 10K Ohm resistor in series with an insulated wire (such

as test probe) between the picture tube dag and 2nd anode lead (Have AC line cord disconnected from

AC supply).

The picture tube used in this receiver employ integral implosion protection. Replace with a tube of the

same type number for continued safety. Do not lift picture tube by the neck. Handle the picture tube

only when wearing shatterproof goggles and after discharging the high voltage completely. Keep

others without shatter proof goggles away.

Before returning the receiver to the user, perform the following safety checks:

1. Inspect all lead dress to make certain that leads are not pinched or that hardware is not

lodged between the chassis and other metal parts in the receiver.

2. Replace all protective devices such as non-metallic control knobs, insulating fish papers,

cabinet backs, adjustment and compartment covers of shields, isolation resistor-capacitor

networks, mechanical insulators etc.

3. To be sure that not shock hazard exists, a check for the presence of leakage current

should be made at each exposed metal part having a return path to the chassis (antenna,

cabinet metal, screw heads knobs and/or shafts, escutcheon, etc.) in the following

manner.

Plug the AC line cord directly into a 110V/220V/240V, AC receptacle. (Do not use an Isolation

Transformer during these checks.) All checks must be repeated with the AC line cord plug connection

reversed. (If necessary, a non polarized adapter plug must be used only for the purpose of completing

these checks.)

If available, measure current using an accurate leakage current tester. Any reading of 0.35mA or more

is excessive and indicates a potential shock hazard, which must be corrected before returning the

receiver to the owner.

If a reliable leakage current tester is not available, this alternate method of measurement should be

used. Using two clips leads, connect a 1500 Ohm, 10 Watt resistor paralleled by a 0.15MF capacitor

in series with a known earth ground, such as a water pipe or conduit and the metal part to be checked.

Use a VTVM or VOM with 1000 Ohms per Volt, or higher, sensitivity to measure this AC voltage

drop across the resistor. Any reading of 0.35 Volt RMS of more is excessive and indicates potential

shock hazard, which must be corrected before returning the receiver to the owner.

-7-

Model No.: 14KLS4CE

Version: 1.0

ALIGNMENT PROCEDURES

1. Use an Isolation Transformer when performing any service on this chassis.

2. Never disconnect any leads while receiver is in operation.

3. Disconnect all power before attempting any repairs.

4. Do not short any position of the circuit while the power is on.

5. For safety reasons, replace components any with identical replacement parts (SEE PARTS LIST).

6. Before alignment, warm up the TV for at least 30 minutes and demagnetize the CRT with an

external degaussing coil.

7. When removing a PCB or related component, after unfastening or changing a wire, be sure to put

the wire back in its original position.

8. Inferior silicon grease can damage IC's and transistors. When replacing IC's and transistors, use

only specified silicon grease. Remove all old silicon when applying new silicon.

9. Before removing the anode cap, discharge electricity because it contains high voltage.

-8-

Model No.: 14KLS4CE

Version: 1.0

SERVICE FLOW CHART

Power supply

Check input voltage ―→ check voltage of C910 anode ―→ check Pin 3 of N901 ―→ check

V901 ―→ check output voltage of T901 secondary coil ―→check voltage of N904, N905 Pin 3

(5.0v) and N903 Pin3 (9.0V) ―→check voltage of N103 Pin 8, 31, 32, 35, 36, 43, 55 (5v) and Pin 11,

19 (8v)―→ check voltage of N602 Pin 8 (+5V).

Audio circuit

Check power supply of audio power amplify circuit ―→ check input audio signal of audio power

amplify circuit ―→ check waveform of N103 Pin 5―→ check waveform of xs808 Pin 16, 17―→

check waveform of N201 Pin 8, 10.

Horizontal circuit

Check voltage of T402 Pin 3 (110V) ―→ check voltage of N103 Pin 19 (+9.0V) ―→ check

waveform of V401 Base ―→ check waveform of V402 Collector ―→ check output voltage of

T402 coil ―→ check waveform of T402 Pin 8.

Vertical circuit:

Check voltage of N440 Pin 2 (+25V) and Pin7 (+9V)―→ check voltage of N103 pin 19 (+9V) ―→

check waveform of N103 Pin 17 ―→ check waveform of N440 Pin 1 ―→ check waveform of

N440 Pin 5

MCU circuit:

Check voltage of N103 Pin 31, 32 (5v) ―→ check waveform of N103 Pin 33.

-9-

Model No.: 14KLS4CE

Version: 1.0

ADJUSTMENT MANUAL

1. Test Notices:

a. Please follow the pointed test steps and choose the right test equipment to conduct

adjustment, otherwise good effect of TV set could not be obtained. Pointed bias voltage

value should be ensured during test to get satisfied test result.

b. To adjust the chassis, you should write master slice’s data into the memory N602, which

will be installed into this chassis before installing, and no any data except this test manual

listed is promised to be modified without designer’s agreement.

c. The unit should be warmed up 30 minutes before adjustment, and should demagnetize it with

degaussing coil.

2. Test equipment

a. DC Power Supply (14V)

b. Oscilloscope

c. Vacuum Voltage Meter

d. Multimeter (Internal resistance: DC≥20kΩ/V, AC≥5kΩ/V)

e. High Voltage Meter 30kV

f. Ammeter（0.5 grade，DC 3mA position）

g. Demagnetizing Coil

h. PHILIP Pattern Signal Generator（5820）

i. Standard Signal Generator (3216)

3. Factory test menu

a. Press MENU button on the remote control firstly, then the press RECALL button three

times sequentially to enter FACTORY MENU.

b. Press P+ or P- button on the remote control to select test item.

c. Press V+ or V- button on the remote control to adjust the value of selected item.

d. Press RECALL button again to exit FACTORY MENU.

FACTORY MENU 00

H-PHASE 11

OSD-H-POSITION 25

V-SIZE 82

V-POSITION 1

V-LINEARRITY 22

V-SC 4

V-KILL 0

SUB-BRIGHT 50

RF-AGC AUTO 25

-10 -

Model No.: 14KLS4CE

Version: 1.0

FACTORY MENU 01

H-BLK-L 1

H-BLK-R 1

TUNER 0:QJ 1:ALPS 0

VOL LINEAR MEASURE 0

B-Y DC LEVEL 10

R-Y DC LEVEL 11

B-Y DC LEVEL-YUV 9

R-Y DC LEVEL-YUV 8

FACTORY MENU 02

RED-BIAS 117

GREEN-BIAS 134

BLUE-BIAS 153

RED-DRIVE 99

GREEN-DRIVE 15

BLUE-DRIVE 92

OPTION MENU 00

BACK COVER OPTION 0

Q-ASM OPTION 0

OPT-AV-SYSTEM 1

Y-IN 0:P48 1:P54 1

OPT-YUV 0

LANGUAGE SW CE 1

ENG0 : CH 1 0

OPTION MENU 01

LV1116 OPT 1

AUDIO SW 1

SIF6.5M 1

SIF6.0M 1

SIF5.5M 1

SIF4.5M 1

4. Power Supply and Voltage adjustment

a. Check AC voltage is normal or not, AC220V 50Hz.

b. Receive Television broadcast signal adjust Brightness and Contrast until the standard

picture is obtained.

c. Adjust RP950 until voltage between cathode of VD950 and GND of chassis is 110V±

0.5V. (Detail voltage please see B/M)

Inhaltsverzeichnis

Andere akira Fernseher Handbücher

akira

akira CT-21TF9 Bedienungsanleitung

akira

akira CT-25XG9 Series Bedienungsanleitung

akira

akira 29WHP3/ANZ Bedienungsanleitung

akira

akira CT-25TW9AN Bedienungsanleitung

akira

akira CT-21FGS1 Bedienungsanleitung

akira

akira CT-21LPS1MKI/ANZ Bedienungsanleitung

akira

akira CT-21GT9 Series Bedienungsanleitung

akira

akira CT-29FD9CPT Bedienungsanleitung

akira

akira CT-21CH9 Bedienungsanleitung

akira

akira 21FS9 Series Bedienungsanleitung

akira

akira CT-14DX9 Bedienungsanleitung

akira

akira CT-21XF9 Bedienungsanleitung

akira

akira CT-14AZ9CP Bedienungsanleitung

akira

akira 21FES1 Series Bedienungsanleitung

akira

akira CT-21DS9A Bedienungsanleitung

akira

akira CT-29FS9 Series Bedienungsanleitung

akira

akira 14TDS3/VE Bedienungsanleitung

akira

akira 21SWS1 BN Bedienungsanleitung

akira

akira CT-29DR9 Series Bedienungsanleitung

akira

akira 14FES1/BE Bedienungsanleitung

akira

akira CT-14XJ9N Bedienungsanleitung

akira

akira CT-25NI9AN Bedienungsanleitung

akira

akira CT-14XBS1 Bedienungsanleitung

akira

akira CT-21CQS5CPT Bedienungsanleitung

Beliebte Fernseher Handbücher anderer Marken

Philips

Philips Colour Television Bedienungsanleitung

Toshiba

Toshiba 27A10 Bedienungsanleitung

Philips

Philips 42PF9630A/37 Bedienungsanleitung

Hitachi

Hitachi 32FX48B Bedienungsanleitung

DAEWOO ELECTRONICS

DAEWOO ELECTRONICS DTQ-14V1FC Bedienungsanleitung

Changhong Electric

Changhong Electric uhd55b6000is Bedienungsanleitung

Philips

Philips Matchline 21CE7551 Bedienungsanleitung

Panasonic

Panasonic Genus TX-G10 Bedienungsanleitung

Toshiba

Toshiba 19A20 Bedienungsanleitung

Philips

Philips 25PT4523-16 Bedienungsanleitung

Sony

Sony XBR-100Z9D Bedienungsanleitung

Philips

Philips PR0930X3 Bedienungsanleitung

Philips

Philips Brilliance 231P4QPY Bedienungsanleitung

Samsung

Samsung 55S9 B Series Bedienungsanleitung

Philips

Philips 32HF9385D Fehlerbehebungshandbuch

Sharp

Sharp LC-40FI5012E Bedienungsanleitung

Loewe

Loewe Table Stand Reference 55 Bedienungsanleitung

Philips

Philips 32PFH5300 Bedienungsanleitung

akira 14KLS4/CE Bedienungsanleitung

Beliebte Fernseher Handbücher anderer Marken