View la9241m datasheet:

Ordering number: EN 5564 Monolithic Linear IC LA9241M Analog Signal Processor (ASP) for CD players Overview Package Dimensions unit : mm The LA9241M is an analog signal processing and servo control bipolar IC designed for use in compact disc players; a compact 3159-QFP64E disc player can be configured by combining this IC with a CD-DSP such as the LC78622E and LC78620E, with a small [LA9241M] number of additional components required. Functions I/V amplifier, RF amplifier (with AGC), SLC, APC, FE, TE (with VCA and auto-balance function), focus servo amplifier (with offset cancellation function), tracking servo amplifier (with offset cancellation function), spindle servo amplifier (with gain switching function), sled servo amplifier (with off function), focus detection (D