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(3)Verify HSYNCZ,VSYNCZ,ACTDATA, SYNCVALID(HI Active) control signal
4. Verify U74A PIN1 Running at 120HZ. If no color wheel spinning, check U71 data
transfer on the following line MTRDATA,MTRCLK,MTRSELZ.
5. Verify motor spinning line from micro-controller U71 (PIN51) to FPGA(U76 PIN
126) is Hi.
6. Verify hardware LAMPEN (U76 PIN168) is Hi (3.3v).
7. Check LAMPLIT is Hi.
8. If everything else verified, but still no image, perform the following check
(1) Check DMD voltage at output of generation circuits, but also out of U88
(DMDSR16) IC (be careful not to probe on pins r the device could be damaged)
VBIAS(22-25V), VRESET(-26V), VCC2(7.5V).
(2) Check voltage enable form FPGA are active as appropriate. If not, output
Driver may be blown from previous probing.
(3) Be sure two reset lines are not tied together or the device will be damaged.
(4) Verify I
C communication by reading system status and micro-controller
2
version.
9. Be sure front end electronics are sending one pixel per clock.
10. Elastomer and DMD are aligned properly to pads.
11. Check data transfer on the following lines: PBCLKZ, PBDAT0, PBDAT1.
12. If Color wheel has difficulty in starting or is unstable, the capacitors may need to
be adjusted to match the motor parameter.
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