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Tauras TV3K - TXT Service Manual

Colour television receiver
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TV3K - TXT
COLOUR TELEVISION RECEIVER
SECIFICATION
SYSTEM
POWER INPUT
POWER CONSUMPTION
AERIAL IMPEDANCE
TUNER
RECEIVING CHANNELS
PROGRAMME
PICTURE TUBE
SOUND OUTPUT
SPEAKER
AV JACKS
CAUTION
: Before servicing the chassis, read the "Safely Precaution".
"X -Ray radiation Precaution" and "Product Safety Notice" in this manual.
X-RAY RADIATION PRECAUTION
1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To
Avoid such hazards the high voltage must be specified limit. The normal value of the
high voltage of this receiver is 24.5KV +/-2KV under 230V AC power source. The
high voltage must not exceed 27KV.
2. Each time a receiver requires servicing the high voltage should be checked following
the HIGH VOLTAGE CHECK procedure in this manual. It is recommended the
reading of the high voltage be recorded as a part of the service record. It is
important to use an accurate and reliable high voltage meter.
3. The primary source of X -RAY RADIATION in this TV receiver is the picture tube. For

SERVICE MANUAL

PAL/SECAM,B/G,I.
AC 170-245V(50/60Hz)
60W
75OHM UNVALANCED
VOLTAGE SYNTHESIZER TUNING
VHF-L E2-S6
VHF-H S7-S41
UHF E21-E69
MAX.99 PROGRAM MEMORIES
14",20",21";90°
2.0W
3W 8 OHM
FULL SCART ×1

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Summary of Contents for Tauras TV3K - TXT

  • Page 1: Service Manual

    TV3K - TXT COLOUR TELEVISION RECEIVER SERVICE MANUAL SECIFICATION SYSTEM PAL/SECAM,B/G,I. POWER INPUT AC 170-245V(50/60Hz) POWER CONSUMPTION AERIAL IMPEDANCE 75OHM UNVALANCED TUNER VOLTAGE SYNTHESIZER TUNING RECEIVING CHANNELS VHF-L E2-S6 VHF-H S7-S41 UHF E21-E69 PROGRAMME MAX.99 PROGRAM MEMORIES PICTURE TUBE 14”,20”,21”;90°...

  • Page 2: Safety Precaution

    continued X-RAY RADIATION protection, the replacement tube must be exactly the same type tube as used in this TV receiver. 4. Some parts in this receiver have special safety-related characteristics for X-RAY RADIATION protection. For continued safety, parts replacement should be undertaken only after referring the PRODUCT SAFETY NOTICE below.

  • Page 3: High Voltage Check

    Make sure the AC power supply is 230V, 50Hz. Switch on the TV receiver, tune in an active channel. Measure the voltage between C641 on Main P.C. Board by DC voltmeter. Set contrast, brightness, color to maximum. Adjust VR631 on Main P. C. Board for B+108.0V+/-0.5V voltage reading. HIGH VOLTAGE CHECK AUTION: There is no high voltage adjustment in this chassis, B+108V voltage directly relates to the high voltage.
  • Page 4 To enter the table 2, press the ‘OK’ key for the first time on the remote control when in the service mode. Table 2 Parameter Value Tuner AGC H position VPOS 50 VPOS 60 VAMP 50 VAMP 60 Bright max Bright min - / -- Sub Tint...
  • Page 5 B0=Logo Display (0=OFF, 1=ON) OPTION2: (It’s better to keep the default setting option2=0) B5=Half_Contrast (0=OFF, 1=ON) B4=Color 6db (0=OFF, 1=ON) B3=APR Feature (0=ON, 1=OFF) B2=Black Stretch (0=ON, 1=OFF) B1=Auto Flesh (0=ON, 1=OFF) B0=Coring (0=ON, 1=OFF) OPTION3: B5=AVL (0=OFF, 1=ON) B4=PIF Over modulation (0=OFF, 1=ON) B3=Market_France-SECAM L/L’...
  • Page 6 appears on the screen. And then press the ‘AV’ key on remote control. The CPU will adjust automatically once again until the ‘VCO Status OK’ appears on the screen. GEOMETRY To adjust the picture position and vertical size, select the appropriate parameter in the service mode and adjust as necessary.
  • Page 7 NOTE: 1, IS MARK OF CRITICAL COMPONENT; 2, SUBJECT TO CHANGE WITHOUT NOTICE. 14 INCH CRT ALTERNATIVE CRTS XS200 SCART V /O FB/I STATUS AL/I AR/I IC411 AN5265 Q503 V /I AL/O AR/O 2SA1015Y +5VA Q425 +12V C506 C291 L213 +18V XS401 SPEAKER...

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