Samsung SP46L6HRX Diagram
Troubleshooting
Samsung Electronics 6-1
6. Troubleshooting
6-1 Checkpoints by Error Mode
1. Power Light: Check the master switch (ON/OFF) and the fuse to see if they are operating.
2. LED Blinking: See the basic LED checklist in 6-2-1
< Blinking Temp & Timer LED >
< Blinking Lamp and Temp LEDs >
Are fans running?
No
Check for 8Vdc at
CN103 & 104 on Detect
Board
No
Check CN802 pins 8&10 on
the Power board for 12VB
Yes
Replace
the Analog board
Is lamp cover installed?
Yes
Yes
No
Replace Detect Board
Replace fan(s)
Replace Power Board
No
Install lamp cover
Yes
CN101
Make sure lamp cover
switch is activating
Yes
Short CN101 on
Sub-Detect Board
Replace the Sub-Detect Board
Replace the Digital Board
Check boss
on Lamp Cover
No
No
No
Troubleshooting
6-2 Samsung Electronics
< Blinking Temp LED >
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.
CN105
Check Temp Sensor
connector CN105 on
Sub-Detect Board
Yes
Install jumper across
Temp Sensor Terminals
Does it work?
Yes
No
No
Re insert
the Connector
Replace
Actuator board
Temperature Sensor
Replace Temp. Sensor
Do fan(s) run?
No
Replace color wheel assy'
Yes
Does color wheel run?
No
Yes
Yes
Yes
Is lamp on?
No
Replace DMD Board
Check 280V DC to lamp ballast(CN1)
Measure with DC meter
No
Yes
Does lamp
No
come on, then
shut off?
Yes
Replace Power Board Re-install lamp assy'
No
Check pin 1 on CN503
on DMD Board for 5V DC
No NoYes Yes
Check 5Vpp at CN503
pin 3 on DMD Board
Replace lamp assy' or ballast Replace DMD Board Replace ballast or lamp assy'
Troubleshooting
Samsung Electronics 6-3
3. Noise:
Internal noise may be caused by a foreign substance on the fan or driving device.
For a DLP TV, the lamp fan, DMD board fan and color wheel are vulnerable to noise. Sometimes the connector wire around the
lamp or DMD fan makes contact with the fan, while the color wheel is protected inside the module and cannot make contact with
any nearby wires. However the color wheel sensor or the drive motor may cause noise by making contact with the color wheel.
As the color wheel uses an air bearing system, it has a very slight possibility of creating internal noise.
Sometimes outworn transistors may cause noise when regular noise occurs for other reasons than the fan itself.When irregular
noise occurs for no particular reason, check the inside of the TV for any foreign substances.
The DLP projection TV may cause noise as the physical screen is empty inside, causing a resonance to a particular frequency.
Thus a low vibration is not a malfunction.
Any 'creaking' noise is mostly from the structure of the device itself. A short, harsh noise may occur from a distortion or
malformation due to thermal expansion between the metal joints, screws and loaded parts, respectively. Any intermittent 'creaking'
noise can be removed by loosening the screws.
4. Black Screen (Voice Output):
Check the lamp/ballast of the replacement and, if there is nothing wrong, check the array resistance RA701-RA704 for the wave
form or look into the connector joint areas as described in the manual (p.6-1).
When the measurement is not +- 25v, DDP1011 is in error. In conclusion, you should replace the DMD board.
5. A black screen with the lamp on: Replace the DMD board.
6. Line Pattern: Regular line patterns occur vertically or horizontally: Replace the DMD board.
7. Voice Distortion: Replace the analog board.
8. Outside Light: This is not a product malfunction, but a possible installation or human error. This occurs when the projected light
from the surrounding illumination reflects onto the screen. This disappears as the TV starts operating and the TV lamp gets
brighter. However, you can avoid outside light by changing the position of the TV or the installation angle.
Decreasing the illumination or changing the indoor lighting may work.
9. Screen Flip-over:
Enter Factory mode in DDP1011 and perform H-Flip (flip horizontally) and V-Flip (flip vertically).
The screen will flip over horizontally or vertically.
Lamp On Check if the lamp is on
DDP1011 Error
Check RA701 ~ RA704
TP (See page 13-7)
No
No
Yes
Troubleshooting
6-4 Samsung Electronics
10. Other Screen Errors:
▶ 40 Vertical lines 16 pixels wide:
DDP1011 or BGA, DMD panel interference.
→ Replace the DMD board
.
▶ Horizontal Bar or No Raster:
Error in DDP1011 or the DMP panel.
→ Replace the DMD board
▶ Dotted Vertical Bar:
Error in Rambus Dram(IC 403) or the soldering
→ Replace the DMD board
▶ Beehive mosaic patterns all over the screen:
Error in the LVDS Receiver (IC 601) or the soldering
The H sync signals are not transferred to DDP1011.
→ Replace the DMD board.
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