Universum FT-81031, Service Manual

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15
Pinning:
2,8,24,42,55 Supply volt ( V SS=0V ) 54. System clock 1
9,25,41,56 Supply volt ( V DD=3.3V ) 17,..,10 Data output UV
36,52,58 Supply volt ( V SS=0V ) 7,..,3;1;64;63 Data output Y
35,51,53,57,59 Supply volt ( V DD=3.3V ) 62 Horz active video out
43,..,50 Data input Y 61 V-Sync out / Ext V-Sync
31,..,34;37,..,40 Data input UV 60 H-Sync out / Ext H-Sync
30 System reset. 18 Interlace signal vert deflection
23 H-Sync input 28 Crystal conn / System clock 2
22 V-Sync input 27 Crystal connection
29 Sync enable input 26 Clock output
21 I2C-Bus data line 19 Test input
20 I2C-Bus clock line
DDP3310:
It is the display and deflection processor. All the horizontal and vertical stages are driven by this IC.
The last controls such as contrast, brightness and saturation of the actual video signal, OSD and VGA are accomplished
by the blocks in DDP. Tube measurement and SVM controls are also managed by this IC.
Features:
Video processing
– linear horizontal scaling (0.25 4)
– non-linear horizontal scaling “panoramavision”
– dynamic peaking
– soft limiter (gamma correction)
– color transient improvement
– programmable RGB matrix
– picture frame generator
– two analog RGB/Fast-Blank inputs
Deflection processing
– scan velocity modulation output
– high-performance H/V deflection
– EHT compensation for vertical / East/West
– soft start/stop of H-Drive
– vertical angle and bow
– differential vertical output
– vertical zoom via deflection
– horizontal and vertical protection circuit
– adjustable horizontal frequency for VGA/SVGA dis-play
Miscellaneous
– selectable 4:1:1/ 4:2:2 YC r C b input
– selectable 27/ 32-MHz line-locked clock input
– crystal oscillator for horizontal protection
– automatic picture tube adjustment (cutoff, white-drive)
– single 5-V power supply