Akira LCT-20KXST Schematic

LCT TV

Service Manual

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MODEL:

LCT-20KXST

Model No.: LCT-20KXST
Version: 1.0

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CONTENTS

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

MAIN BOARD ........................................................................................................................................7

CIRCUIT DIAGRAM.............................................................................................................................. 8

PCB BOARD .........................................................................................................................................21

EXPLODED VIEW................................................................................................................................ 32

PART LIST............................................................................................................................................. 35

Model No.: LCT-20KXST
Version: 1.0

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SPECIFICATION

FEATURES:

 Power supply: DC 15V/5A (Adaptor)

o Adaptor power supply: AC 100~240V 50/60Hz

 Multi TV system: PAL BG /DK /I and SECAM BG /DK /LL’

 Multi standard sound processors: NICAM, FM-stereo

 Multi Video system: PAL /NTSC /SECAM

 Versatile input sources: TV, Video, S-Video, Scart, PC (analog)

 Full function remote controller

 Excellent sound effect with volume, trable, bass, balance AVC adjustable

 Smart sound & picture mode set: Standard, speech, music, soft, rich

 Adaptive 2/4 line comb filter for PAL /NTSC

 VTR for weak and distoreted signal from video tape recorder

 10 pages teletext (option)

 CCD, V-Chip (option)

 Automatically turn off the set when signal absent longer than 10 minutes.

 256 channels

 Blue screen display

Model No.: LCT-20KXST
Version: 1.0

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GENERAL SPECIFICATION

PART 1: TV SET

67watt (max) Power consumption

≤3watt (stby)

TV receive system PAL D/K I B/G SECAM B/G DK /LL’

Video system Multi PAL /SECAM /NTSC

Vision intermediate frequency 38.9MHz, 33.95MHz (L’)

Inter-carrier frequency

Channels received

Tuning mode PLL SYSTEM

AV In /Out specification

Antenna input impedance 75Ω

Audio output power >3W (1KHz, 0.5Vrms, 10%THD)

LED indicator

Hand set power supply Battery 1.5V (AAA) x 2

5.5 MHz (B/G)

6.0 MHz (I)

6.5 MHz (D/K, L/L’)

5.85 MHz (NICAM B/G, D/K, L)

6.55 MHz (NICAM I)

5.74MHz (GERMAN STEREO)

BG /DK/ L: 34.47MHz CHROMA if frequency

L’: 38.38MHz

VHF-L 46.25 - 163.25MHz

VHF-H158.25 - 466.25MHz

UHF 471.25 - 855.25MHz

1 AV in, 1 S-Video In AV In /Out

21 pin Scart in

Y/C IN-Y: 1.0± 0.2

Video In ---1.0 ±0.2V

Audio In --- Approx, 500mV

Video Out --- 1.0±0.2V

Audio Out ---Approx, 400mV

RGB In: ≤0.7V

0.7V

2.4-5V (HSYNC & VSYNC)

English /Spanish /Italian OSD language

Russian /German /French

GREEN Power On

RED Power Off

ORENGE Sleep (PC)

p-p

(RGB signal) PC input

p-p

75Ω C:0.7V

p-p

75Ω

p-p

75Ω

p-p

p-p

75Ω

Model No.: LCT-20KXST
Version: 1.0

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PART 2: PC INPUT RESOLUTION

No Resolution V. Freq (Hz) H.Freq (KHz) Band Width

(MHz)

1 720*400 70 31.47 28.322 -/+

2 640*350 70 31.469 25.175 +/-

3 640*480 60 31.47 25.175 -/-

4 640*480 72 37.86 31.5 -/-

5 640*480 75 37.50 31.5 -/-

6 800*600 56 35.156 36 +/+

7 800*600 60 37.88 40 +/+

8 800*600 75 46.88 49.5 +/+

9 800*600 72 48.08 50 +/+

PART 3: PANEL

Brand & model AU /A201SN01

Resolution 800*600

Displayable color 16.7MHz

Surface Hard coating + Anti-Radiation

Viewing Angle (H/V) 160o (Hor) /120o (Ver)

Display Response Time 16ms

Contrast Ratio 1:500

Brightness 450nit

Aspect 4:3

Lamp Life 50,000Hrs

Bad Pixel Quality (Bright /Dark /Total) 2 /3 /5

Polarity H/V

Model No.: LCT-20KXST
Version: 1.0

MAIN BOARD

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Model No.: LCT-20KXST
Version: 1.0

CIRCUIT DIAGRAM

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Model No.: LCT-20KXST
Version: 1.0

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Model No.: LCT-20KXST
Version: 1.0

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Model No.: LCT-20KXST
Version: 1.0

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Model No.: LCT-20KXST
Version: 1.0

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Model No.: LCT-20KXST
Version: 1.0