Av Switching - Panasonic EURO 4 Chassis Technical Manual

19. AV Switching

AV switching on EURO 4 is performed on the
H-Board, where switching IC
This switching IC being used to feed video out to the
AV2 scart socket.
The signals fed to the H-Board for switching to by
IC3401 are:
:
RF Video
This signal is the video fed from the tuner to the
H-Board and the AV switching IC
RF video signal is then output via pin 6 of
where the signal is then fed directly to AV2 scart
socket via H1 pin 8 and E15.
:
AV2 V-Out
The signal selected for AV2 V-Out can be fed from
any of the previously mentioned inputs. This selected
signal is fed via transistor
of IC3401. Here the video signal is switched and
output via pin 6 of IC3401
pin 8, to connector E15 of the E-Board before being
fed to AV2 video out of the 21 pin scart socket.
M3
H2
Models without
H1
E15
IC3401 can be found.
IC3401 pin 3. The
IC3401
Q3402 and input via pin 8
and fed via connector H1
M-Board
Those models without the previously mentioned
M-Board (non Wide Screen models) feeds the signal
selected for output via AV2 from the VDP
59 to connector E15 pin 6.
Here the selected video signal is passed to the
H-Board via connector H1 pin 6 from where the
video signal is fed via transistor
IC3401.
This video signal then follows the previously
mentioned processing path with the signal being
output via pin 6 of IC3401.
19.1.Control
Control of this switching IC is performed by the
MSP3410 IC2101
control commands are fed from the microprocessor
IC IC1101 via the I
This switching control fed from the MSP3410
IC2101 pin 4 is fed via connector H3 pin 3 and fed to
transistor Q3401 where the signal is amplified and
applied to the switching IC
57
3DQDVRQLF
Q3402
pin 4, although the switching
2
C bus to the MSP3410 IC2101.
IC3401 pin 5.
H3
IC3401
TEA2114
IC601 pin
to pin 8 of