Read Sony STR-DA6400ES (serv.man4) Service Manual online
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When GUI Menu on TV screen is required with key input, VIDEO
SYSTEM CONTROLLER (IC3610) starts to communicate with OSD
CONTROLLER (IC3604) with DATA BUS through BUFFER (IC3620)
and ADDRESS BUS through BUFFER (IC3619). S-RAM (IC3611) is
used for processing of GUI Menu screen data.
CONTROLLER (IC3604) with DATA BUS through BUFFER (IC3620)
and ADDRESS BUS through BUFFER (IC3619). S-RAM (IC3611) is
used for processing of GUI Menu screen data.
The video data of GUI Menu is sent from R, G and B terminal (IC3604
103-105 pin) to VIDEO PROCESSOR 1 (IC3601).
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