Lan Block - Panasonic BB-HCM371A Service Manual

through the Serial I/F.
2. After the law to linear conversion, amplification and DA conversion,
they are output to pin 2 of the speaker jack (CN604) as sound output
signal in the PCM Codec (IC601).
13.5. LAN BLOCK
Composed of the IC103 (CPU), the IC202 (ETHER-PHY), the T601 (Transformer) and the CN605 (RJ45).
The T605 (Transformer) obtains isolation between the Set and the Ethernet.
The IC103 (CPU) and the IC202 (ETHER-PHY) are connected by a signal called MIIBus and it makes
Ether net data sending and receiving possible.
Sending
The electrical signal sent from the IC103 is converted to Ethernet data at the IC202 and sent from the
CN605 through the T601.
Receiving
The Ethernet data received from the CN605 is converted to electrical data at the IC202 and received to
the IC103.
13.6. MOTOR DRIVING BLOCK
The pan tilt is performed, as the ASIC (IC101) mounted on the Main Board controls the Motor Driver
(IC201). The home position of the pan tilt operation is detected by the Pan Photo Sensor (IC303 on the
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