Read Sony DVP-NW50 (serv.man2) Service Manual online
16
16
3-4. Ethernet data communication
SYSTEM
CONTROLLER
(U1)
PHYSICAL
LAYER
TRANSCEIVER
(U26)
RESET
(U32)
TX signals
RX signals
TX+/TX-
RX+/RX-
LED
(D13. D18, D20, D21)
Ethernet
Please refer to Block diagram on page 25 in the Service manual.
When RVDD (3.3V) is supplied to RESET (U32), RESET outputs a reset signal
to PHYSICAL LAYER TRANSCEIVER (U26).
to PHYSICAL LAYER TRANSCEIVER (U26).
Then, PHYSICAL LAYER TRANSCEIVER starts up.
PHYSICAL LAYER TRANSCEIVER is supporting the physical data processing.
The logical data processing is supported by SYSTEM CONTROLLER (U1).
SYSTEM CONTROLLER and PHYSICAL LAYER TRANSCEIVER send data
with TXD and RXD data lines. And, clock, error and enable or valid signals are
also sent for data communication.
with TXD and RXD data lines. And, clock, error and enable or valid signals are
also sent for data communication.
The condition of PHYSICAL LAYER TRANSCEIVER can be checked with four
LEDs.
LEDs.
While Ethernet signal communication have no problem, LED turns on or flashing
frequently by data communication timing.
frequently by data communication timing.
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