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DMD DRIVER BOAR
D
Debugging Flow Diagram
Apply Power
to boards
When DC supply
voltages are in spec
drive PWRGOOD High
After specified time
driveRESETDMD
High
Color Wheel
Spins Up?
Good Image
Displayed
Lamp goes off
when lamp type
is selected
Lamp Lights
and stays on?
Image is
displayed
1
END
1. Check if LAMPEN(U76 PIN168) is driven high
2. Check if color wheel is running at correct rate
3. Check interconnect to ballast
4. Verify CWSPIN(U71 PIN51) signal from
Hitachi to FPGA (U76 PIN126) is high
5. Check lamp and ballast
6. Verify that PWRGOOD or RESETZ does not
glitch during ignition
1. Check motor cable interconnect
2. Verify RESETDMD and PWRGOOD are high
3. Check Supply Voltages
4. Check U71 PIN3 (14.5MHz),U76 PIN127
(CK2P33M),(2.417MHz)&U90 PIN16
(9.66MHz)clocks are running and at correct
frequencies
5. Check values of Allegto timing capacitors
6. Check programmable parts are programmed
7. Check MTRDATA,MTRCLK and MTRSELZ
1. Check CWINDEX(U74A PIN1) is occurring
once per color wheel revolution
2. Verify the correct lamp sync timing is
being generated by LAMPSYNC or
LAMPEN(UHP or VHP)
3. Check lamp and ballast
1. Check CWINDEX is occurring once per color
wheel revolution
2. Check LAMPLIT is high
3. Check DMD elastomer interconnect
4. Verify SYNCVALID is high
5. Verify input VSYNCZ,HSYNCZ,ACTDATA&
CLKIN are valid
6. Check DMDVCC is 5V
N
N
N
Y
Y
Y
N
Y
Y
N