Samsung HL-R4667W Service Manual page 45

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Troubleshooting
A blinking lamp LED is the most common failure indication. It can be caused by no lamp, no color wheel, no fan(s), or other
defective components.
6-2
< Blinking Temp LED >
Check Temp Sensor
CN105 connector CN105 on
Sub-Detect Board
Install jumper across
Temp Sensor Terminals
Does it work?
Replace Temp. Sensor
Do fan(s) run?
No
Replace color wheel assy'
Replace DMD Board
Check 280V DC to lamp ballast(CN1)
Measure with DC meter
No
Replace Power Board
Check pin 1 on CN503
on DMD Board for 5V DC
Yes
Replace lamp assy' or ballast
Published in Heiloo, Holland.
Re insert
No
the Connector
Yes
No Replace
Actuator board
Yes
Yes
Does color wheel run?
No
Yes
Yes
Re-install lamp assy'
No
Check 5Vpp at CN503
pin 3 on DMD Board
No Yes
Replace DMD Board Replace ballast or lamp assy'
Temperature Sensor
Yes
Is lamp on?
Yes
No
Does lamp
No
come on, then
shut off?
Yes
No
Samsung Electronics
9/13/15