Hitachi HTD-K185UK, Service Manual

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9 FRONT PANEL
9.1 VFD CONTROLLER
The VFD controller is a NEC uPD 16311. This controller is not a processor, but does
include a simple state machine which scans the VFD and reads the front panel button matrix.
The 16311 also includes RAM so it can store the current state of all the VFD icons and
segments. Therefore, the 16311 need only be accessed when the VFD status changes and
when the button status is read. The MT1379 can control this chip directly using PIO pins or
can allow the front panel PIC to control the VFD,
10 CONNECTORS
10.1 Scart Connectors
Cable between VCR and TV (Scart)
TV VCR
Audio Right Out 1 2 Audio Right In
Audio Right In 2 1 Audio Right Out
Audio Left Out 3 6 Audio Left In
Audio Left In 6 3 Audio Left Out
Audio Ground 4 4 Audio Ground
Red 15 15 Red
Red Ground 13 13 Red Ground
Green 11 11 Green
Green Ground 9 9 Green Ground
Blue 7 7 Blue
Blue Ground 5 5 Blue Ground
Status / 16:9 8 8 Status / 16:9
Reserved 10 10 Reserved
Reserved 12 12 Reserved
Fast Blanking Ground 14 14 Fast Blanking Ground
Fast Blanking 16 16 Fast Blanking
Video Out Ground 17 18 Video In Ground
Video In Ground 18 17 Video Out Ground
Video Out 19 20 Video In
Video In 20 19 Video Out
Ground 21 21 Ground
Some cheaper SCART cables use unshielded wires, which is just about acceptable for
short cable lengths. For longer lengths, shielded co-ax cable become essential,