This post explains for the semiconductor HA1137W.
The Part Number is HA1137W.
The function of this semiconductor is FM IF System.
Manufacturers : Hitachi
Preview images :
The Hitachi HA1137W is a monolithic integrated circuit developed for the FM IF system in a Hi-Fi stereo tuner set. It includes all those functions necessary for a FM IF housed in a 16-lead, dual-in-line plastic package.
The block diagram shows that the input signal is fed to a three-stage FM IF amplifier/limiter configuration and to a three-stage detector for a tuning meter driver. […]