Akai LTA-32N658HCP, Service Manual, Page: 25 / 58

HY5DU281622FTP-4 internal block diagram:
6. TDA9885T/TDA9886T brief introduction:
The TDA9885 is an alignment-free multistandard (PAL and NTSC) vision and sound IF signal
PLL demodulator for negative modulation only and FM processing.
The TDA9886 is an alignment-free multistandard (PAL, SECAM and NTSC) vision and sound
IF signal PLL demodulator for positive and negative modulation, including sound AM and FM
processing.
Features:
· 5 V supply voltage
· Gain controlled wide-band Vision Intermediate Frequency (VIF) amplifier, AC-coupled
· Multistandard true synchronous demodulation with active carrier regeneration: very linear
demodulation ,good inter modulation figures, reduced harmonics, and excellent pulse
response
· Gated phase detector for L and L-accent standard
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