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TASMIN
EURO 4 Chassis
Amendments
Q104, Q105
Video from the tuner is fed to the base of transistors Q104 and Q105 this video signal then takes
two paths, the video signal is buffered and output on the emitter of Q104.The signal is then fed to
pin 61 of the VDP IC601 through C624.
The video signal is also buffered by Q105 and is output on the emitter.The video signal is then
output at pin 19 of AV1
Q253, Q254
Transistors Q253 and Q254 were originally intended as audio mute transistors,but are no longer
included on the Euro 4 chassis.
Q3001
Video from pin 59 VDP IC601 is fed out through E15 pin 6 to the H board at connector H1 pin 6,
goes through emitter follower transistor Q3402, and is input at pin 8 of the AV switching IC IC3401.
The signal is then output at pin 8 of the AV switching IC back through H1 pin 8 to E15 pin 8 onto
the base of buffer transistor Q3001. The video signal is output from the emitter of Q3001 through to
pin 19 of AV2 video out.
SCHEMATIC
Contents DIAGRAM
TASMIN
EURO 4 Chassis
Amendments
Q1108
A vertical sync pulse is fed to the base of buffer transistor Q1108, the sync pulse is then
output at the emitter, here the sync pulse is split, it goes one way to the vertical protection
circuitry and the other to pin 47 of the microprocessor IC1101
Q3209
Video from AV2 is input to the M board via pin 6 of connector M3. The video signal is fed to
the emitter of Q3208 and goes through the emitter collector junction of the transistor , the
signal is then output at the collector to the base of buffer transistor Q3209. The video signal
is then fed out from the emitter of Q3209 back to connector M3 to the H board for AV
switching.
SCHEMATIC
Contents DIAGRAM