Samsung HL-R4667W Service Manual page 54

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6-3-3 DDP1011 Electronics Debugging Flow Diagram
Authorize
Power to Board
If the supplied DC voltage complies with the
specifications, set POWERGOOD to high.
The time after the condition is
specified sets SYSRSTZ to High.
Is the color wheel
rotating?
Is the lamp on?
When a lamp type is
selected, does the
lamp turn off?
Is the picture displayed?
Is a good image displayed?
Samsung Electronics
Allegro Clock
(DIO18)=8.33MHz?
1. Check if the supplied voltage is 12V
2. Check if the motor cable is properly connected
3. Check the Allegro timing capacitor values
4. Check the MTRDATA, MTRCLK and MTRSELZ values
5. Check if MTRDATA, MTRCLK and MTRSELZ are 5v registered
If all the items above are normal, DDP1011 has an error or the
PCB connection is not correct.
1. Check if LAMPEN is set to High
2. Check if the color wheel is rotating at a correct rate
3. Check if the ballast is properly connected
4. Check if the TACH signal is transferred to DDP1011 from the motor drive
at half the frequency
5. Check the lamp and the ballast
6. Check if PWRGOOD or RESETZ have no problem igniting.
1. Check if CWINDEX operates once for every rotation of the color wheel.
2. Check for the correct lamp sync timing
3. Check the lamp and the ballast
4. Check if LAMPEN stays High
5. Check if the color wheel maintains its rotating speed.
1. Check if CWINDEX operates once for every rotation of the color wheel.
2. Check if LAMPLITZ is Low
3. Check if SYNCVALID is High
4. Check if DMD is properly connected
5. Check if VSYNCZ, HSYNCZ, ACTDATA and CLKIN are ready to be input
Published in Heiloo, Holland.
1. Check if the supplied voltage is 2.5V, 3.3V or 5V
2. Check if SYSRSTZ and POWERGOOD are High
3. Check the 100MHz Oscillator
4. Check if the flash is programmed
5. Check the flash signals
6. Check if DDP1011 POSTST is flexible
7. Check if DDP1011 TRSTZ is Low
8. Check if DDP1011 ICTSENZ is High
9. Check if DDP1011 LSSDEN and RI are Low
9/13/15
Troubleshooting
6-11