Toshiba P600DL service manual Bad image- Horizontal bands or lines

1

Bad image-16 pixel wide vertical column(s)

N

Bad image- Horizontal bands or lines

N

Bad image-

Corrupted color ramp test image

N

Bad image-1 to 32 pixel wide columns that repeat every 32 pixels and flickers at half the frame rate

Y1. Check DMD elastomer interconnect 2. Check DMD data outputs from DPF2A ASIC(U77)

1. Check DMD elastomer interconnect

Y2. Check outputs from DMDSR16C(U88)

3. Check input voltages to DMDSR16C

4.Replace DMD or DMDSR16C if needed

5.Check VCC2 Voltage is 7.5V

	1.	Check interconnect on data inputs GY(8:0),
		RV(7:0),BU(7:0)
Y	2.	Check color wheel alignment
	3. Check CWINDEX has only one rising edge
		transition per color wheel revolution
	4.	Check color wheel is running in correct
		direction
	5.	Verify sequence version is correct from
		color wheel
	6.	Verify flash checksum
	7.	Verify the color wheel is runing at correct
		rate(92-128Hz)

Y1. Check data interconnect between SDRAMs and DPF2A ASIC

2.Replace SDRAM(U78~U81) or DPF2A if needed

N

Bad image-all or most of image is corrupted and flickers at half the frame rate

N

2

1. Check address and control signal

Yinterconnects between FPGA(U76) and the SDRAMs

2.Replace FPGA or SDRAMS if needed

*The flicker is caused by one SDRAM

bank displaying bad data and the other bank displaying good data. This results in bad data displayed every other frame. The freeze command stops the SDRAM buffers(A&B) from toggling between read

&write. This is useful in seeing the output from one SDRAM bank at a time

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