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TV - Conventional CRT, LCD Projectors, TFT, Plasma, Big Screen, HDTV, Home theater - Service manuals, repair tips

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File name RequiresAcrobat6_IE(1).pdf

MITSUBISHI ICs (TV) M52778SP VIF, SIF, VIDEO, CHROMA, DEFLECTION FOR PAL/NTSC DESCRIPTION The M52778SP is a single-chip semiconductor integrated circuit to process signals of a color TV. Circuits to process video IF, sound IF, video, color, and deflection signals, a I2C bus control circuit, and D/ A are build in this device. This IC can be used not only for popular-type TV sets but also for middle-class TV sets. Combined with a SECAM chroma decoder, the M52325AP, this device can process signals of every type of TVs in the world by discriminating them fully automatically. AFT OUT LIMITER IN RF AGC OUT IF AGC FILTER VIF GND VIF IN VIF IN 1 2 3 4 5 6 7 8 9 52 VIDEO OUT 51 VIDEO APC FILTER 50 VCO 49 VCO 48 FM DIRECT OUT 47 EXT AUDIO IN 46 AUDIO OUT 45 - (R-Y) IN 44 - (B-Y) IN 43 - (R-Y) OUT 42 SECAM REF. 41 - (B-Y) OUT 40 X-TAL 4.43 39 SYNC SEP IN 38 Y SW OUT 37 VCD GND 36 TV IN 35 CHROMA APC FILTER 34 EXT IN 33 AUDIO BYPASS 32 X-TAL 3.58 31 FAST BLK 30 KILLER FILTER 29 R IN 28 AFC2 FILTER 27 G IN PIN CONFIGURATION (TOP VIEW) FEATURES VIF VCC H VCC A built-in I2C bus control circuit makes it possible to reduce the number of peripheral parts and rationalize production lines. Various filters (TRAP, BPF, Y-DL, RGB clamp) are build in this IC. PLL detection system is introduced to process video IF and voice IF. Furthermore, AFT coil is not necessary. DL aperture control Color signal frequency and vertical frequency of TVs of every type can be discriminated fully automatically. Horizontal/vertical countdown system V-Ramp output RGB output RAMP AGC 10 SCL 11 SCP OUT 12 H OUT 13 SDA 14 H OSC 15 AFC 1 FILTER 16 I REF 17 +RAMP OUT 18 -RAMP OUT 19 M52778SP APPLICATION PAL/NTSC CTV RECOMMENDED OPERATING CONDITION Supply voltage...V8, 24=5V, V9, 20=8V Rated supply voltage...V8, 24=4.75 to 5.25V V9, 20 =7.6 to 8.4V Maximum output current...5.0mA (pin13) Hi VCC 20 R OUT 21 G OUT 22 B OUT 23 VCD VCC 24 B IN 25 CONTRAST CONT. 26 Outline 52P4B 1 BLOCK DIAGRAM LIMITER IN VIF VCC Hi VCC VIDEO APC FILTER VCO VCO FM DIRECT OUT AUDIO BYPASS IF AGC FILTER EXT AUDIO IN VIDEO OUT VIF GND 20 2 8 AUDIO ATT SW AUDIO SW SYSTEM SET 4.5/6.0 BUS I/F SYSTEM auto peak ACL ACL ID OUT COLOR SERVICE SYSTEM ID 4 51 ATT 49 46 50 52 5 48 33 47 3 RF AGC IF AGC VCO SYSTEM DECODE VCO LOCK DET LIMITER FM DET AF AMP SECAM REF. +RAMP OUT FAST BLK G OUT -RAMP OUT RAMP AGC SCL R IN B OUT I REF AUDIO OUT SDA B IN R OUT G IN H VCC RF AGC OUT 14 11 31 25 CUT OFF R G B HV BRIGHT BLK V SYNC TRIG SECAM REF SERVICE SW RAMP HORIZONTAL COUNT DOWN H STOP AFC GAIN (H.FREEADJ) AFC-1 VCXO MUTE DET MUTE OUT H-PHASE 32FH VCO AFC-2 V-SIZE V-POSITION SYNC SEP DRIVE AMP CLAMP B EXT INPUT R EXT INPUT BRIGHT G EXT INPUT DRIVE R B ADJ DELAY ADJ 4 + 4 6 7 VIF AMP VIDEO DET POS/NEG 1 REF FILTER CONTRAST CHROMA DEMODULATOR EQ E

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