Panasonic EURO 4 Chassis Technical Manual page 33

13.1.3.Q-Link
:
Pin 73 - AV_Link_In / Pin 72 - AV_Link_Out
AV_Link in and out is used to control the transfer of
information and user functions to and from the TV /
VCR via a 21 pin socket, in this case AV2.
The AV link control line fed from pin 10 of the 21 pin
AV2 socket is fed to the collectors of transistors
Q1107, Q1106.
Where data is fed from the TV to the VCR the
AV_Link_OUT control line fed from pin 72 of the
microprocessor IC1101
resulting in the data being fed from pin 72 of the
microprocessor IC1101
Where data is input from the VCR to the TV then the
AV_Link_In control line fed from pin 73 of the
microprocessor IC1101
data being fed via Q1107,
microprocessor IC1101
The type of data and function control information fed
via the AV_Link is as follows:
:
TV Auto Power ON: TV automatically turns ON
when the VCR starts play-back.
is set to a HIGH level
via Q1106.
is set HIGH resulting in the
Q1105 and Q1104 to the
pin 73.
:
VCR Auto Standby: VCR will automatically
switch to standby when the TV is turned OFF, unless
the VCR is in recording mode.
:
TV On screen Display of VCR status.
:
Down load of Country selection.
These above features will only work with a
Panasonic TV / video combination who are both
Q-Link (Project 50+) compliant.
The features below will work with different brands of
TV and video combinations, again as long as both
TV and video are Project 50 compliant.
:
Tuner preset data down load (TV->VCR)
:
What You See Is What You Record (Direct TV)
In addition to these features the TV/Video also
include in their protocol Automatic signal matching
(signal quality). Here the TV/video at first time of
connecting send information regarding each others
features and operation capabilities, such as the
signal standards they can processes and whether
they are able to process and display 16:9 format as
an example.
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3DQDVRQLF