Barco CVM 2037, Инструкция по эксплуатации

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ADJUSTMENTS (continued)
For authorized personnel only
4 Decoder/ RGB (RGB section)
4.1 Synchronization signals
Apply a colour bars signal to
INPUT
1.
Connect the Channel 1 probe of the oscilloscope to TP34 (blue signal).
Trigger the scope on the vertical interval.
Adjust with P10 so that the black level of the signal is on an equal level as the blue AKB pulse.
Connect the probe of Channel 2 of the oscilloscope to TP35 (vertical blanking pulse).
Adjust with P27 for correct position of the AKB pulse (blue channel) were the falling edge is 2
lines after start of the blue AKB pulse ( or 1 line after the end of the blue AKB pulse ).
4.2 Frequency response
Apply a sweep signal to
INPUT 1.
Connect a 2 pF probe of an oscilloscope to the red output of the CRT socket.
Adjust C98 for a flat frequency response up to 5.5 MHz.
Connect the same probe to the green output of the crt socket .
Adjust C106 for a flat frequency response up to 5.5 MHz.
Connect the same probe to the blue output of the CRT socket.
Adjust C114 for a flat frequency response up to 5.5 MHz.
4.3 Saturation level
Apply a colour bars signal to
INPUT 1.
Connect a probe to the blue cathode.
Adjust P11 for 100% saturation ( equal blue bars )
Adjust P9 for 20 Vpp video content ( between black and white )
5 CRT Socket
5.1 VG2 adjustment
Apply a colour bars signal to input 1
Connect an oscilloscope to the green cathode
Adjust P1 on the CRT-socket for 100Vdc ( for CVM 2051 IM ) and 80Vdc ( for CVM 2037 IH
between the top of the AKB-pulse and ground.
5.2 Focusadjustment
Adjust P2 ( Focus ) for optimal focus of the CRT.
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