Panasonic EURO 4 Chassis, Техническое руководство

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3DQDVRQLF
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19. AV Switching
AV switching on EURO 4 is performed on the
H-Board, where switching IC
IC3401 can be found.
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
IC3401 pin 3. The
RF video signal is then output via pin 6 of IC3401
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
Q3402 and input via pin 8
of IC3401 . Here the video signal is switched and
output via pin 6 of IC3401 and fed via connector H1
pin 8, to connector E15 of the E-Board before being
fed to AV2 video out of the 21 pin scart socket.
Those models without the previously mentioned
M-Board (non Wide Screen models) feeds the signal
selected for output via AV2 from the VDP
IC601 pin
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
Q3402 to pin 8 of
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 pin 4, although the switching
control commands are fed from the microprocessor
IC
IC1101 via the I
2
C bus to the MSP3410 IC2101 .
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 IC3401 pin 5.
TEA2114
IC3401
M3
C-
IN
AV
2
C
V.
O
u
t
AV
2
V
-O
u
t
Models without
M-Board
E15
E
63 (
M
S
P
P
in 4)
E
62 (
+
12V
)
E
61 (
R
F
V
ideo)
C-
IN
AV
2
C
V.
O
u
t
AV
2
V
-O
u
t
H2
H1
H3