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TV4KF

NICAM/A2/TXT

SERVICE MANUAL

COLOUR TETELEVISION

Содержание TV4KF-NICAM/A2/TXT

Страница 1: ...TV4KF NICAM A2 TXT SERVICE MANUAL COLOUR TETELEVISION ...

Страница 2: ...rce The high voltage must not exceed 29KV 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...

Страница 3: ...trical and mechanical parts in this chassis have special safety related characteristics are often passed unnoticed by a visual inspection and the X RAY RADIATON protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage The use of substitute replacement parts that do not have the same safety characteristics as specified in the parts list may...

Страница 4: ...ing OK key Service 2 is accessed by pressing Enter key again Service 3 and Service 4 is accessed By pressing PP key we come out of Service mode The items within the Service 1 mode can be accessed using UP DOWN keys and the selected item can be varied using LEFT RIGHT keys The parameters controlled in the Service 1 menu are a Red Gain 0 63 b DC Red 0 63 c Green Gain 0 63 d DC Green 0 63 e Blue Gain...

Страница 5: ...d adjust VCO Coarse L1 and VCO Fine L1 to get VCO OK Status If the cursor is in VCO Coarse L1 or Fine L1 and the display shows VCO OK status then pressing of MENU key will automatically put VCO fine for L1 to the Centre of the 60 to 60 KHz window When in Service 2 menu if OK key is pressed Service 3 menu appears and the display is as follows The parameters controlled in the Service 3 menu are a V ...

Страница 6: ... Mute pin low high to contol the speaker 0 1 b0 TDA7449 TDA7439 0 1 OPTION4 b5 VHF UHF SELECTION 0 VHF UHF 1 UHF b4 SCART2 0 OFF 1 ON b3 RGB 0 OFF 1 ON b2 SVHS 0 OFF 1 ON b1 AV2 0 OFF 1 ON b0 AV1 0 OFF 1 ON OPTION5 please contact ST if you have something not clear here b4 b5 b6 used for the autogain GainDacTable Adoffset ADslope b3 GainDacTable Adoffset ADslope changed permission b1 b2 used for th...

Страница 7: ...service command 1 PP exit 2 OK switch between the service menu 3 AV auto VCO adjust 4 MUTE one line gain 5 ANALOG sub brightness adjust The AV2 should not be set while the RGB is set on ...

Страница 8: ...1 5 9 6 7 8 ñ ò 2 3 4 ...

Страница 9: ...31 18n C429 100n C425 22n C424 100n C423 100n C428 100n C427 18n C426 5 6n C422 22n C421 5 6n R421 2 7K C435 10u RIN1 RIN2 LIN1 LIN2 C444 4 7uF C439 4 7uF C3406 0 1u C3420 0 1u C003 4n7 C012 0 1u C005 220n C004 220P OSD B OSD G OSD R OSD FB SDA SCL C021 82P C019 470n C036 22P R039 5K6 C035 4n7 C022 104 C033 0 1u 5V 5V OUT GND VCC IC011 C040 0 1u 5V CVBS OUT2 VS 1 SC VT 33V SW6 P SW5 P SW4 V SW3 V ...

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