Text preview for : HTL5076SX-XAA_13.pdf part of Samsung HTL5076SX/XAA 14 files, 132 total pages, service manual / data for Samsung DLP TV model # HTL5076SX/XAA with L67B(N) Orchid chassis.
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Troubleshooting
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 >
Are fans running? No Check for 8Vdc at CN804 & CN805 Pin3 on DMD Board. No Check CN804 pins 15&16 on No the Power board for 12VB Yes Replace the Main board Yes Yes
Replace DMD Board
Replace fan(s)
Replace Power Board
< Blinking Lamp and Temp LEDs >
Is lamp cover installed?
Yes No
Install lamp cover
Make sure lamp cover switch is activating
CN101
Yes
No
Short CN802 5&6 Check boss PIN on DMD Board on Lamp Cover
No
Replace the DMD Board
No
Replace the Main Board
Samsung Electronics
6-1
Troubleshooting
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. 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. A black screen with the lamp on: Replace the DMD board. 5. Line Pattern: Regular line patterns occur vertically or horizontally: Replace the DMD board. 6. Voice Distortion: Replace the main or rear board. 7. 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. 8. Screen Flip-over: Enter Factory mode in DDP3021 and perform H-Flip (flip horizontally) and V-Flip (flip vertically). The screen will flip over horizontally or vertically.
6-2
Samsung Electronics
Troubleshooting
9. Other Screen Errors: 40 Vertical lines 16 pixels wide: DDP3021 or BGA, DMD panel interference. Replace the DMD board or DMD Panel .
Horizontal Bar or No Raster: Error in DAD2000 or DMD Panel or other DMD board problem. Replace the DMD board or DMD Panel
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 TMDS Receiver (IC100) or the soldering The H sync signals are not transferred to DDP3021. Check the Digital Board and DVI cable If there was no problem, Replace the DMD board
Samsung Electronics
6-3
Troubleshooting
6-1-1 Video Circuit Error Checking
Basics: - The DDP3021 on the DMD board has a feature to display internal test patterns. - SDP62, which is an end port in the digital board, has a feature to display internal test patterns. - The rear board is the first output and the main board is the second one, followed by DMD, which is the final one. Diagnosis By Module 1. Access Service Mode (In Standby mode, press "Mute", "1", "8", "2" and "Power" to turn the screen on and enter service mode) 2. Check if there is an error in the DMD board DDP3021 TEST PATTERN Press the right arrow key: Options of FULL WHITE, BLACK, RED, GREEN and BLUE PATTERN are displayed on the screen. If "Pattern" does not appear, this is a DMD board error. 3. Check if there is an error in the main board before the DMD. When the DMD board has been determined to be error free based on the test patterns: FACTORY MODE SDP62 TEST PATTERN normal display: no error in the main board. If "Pattern" does not appear, you have to check a rear board first, and check a DMD Board second, next check a main Board. 4. Check for a power signal from the SMPS to the main boards. (See the circuit diagram below).
6-4
Samsung Electronics
Troubleshooting
6-1-2 Flow Chart for Malfunction
Yes If the DLP turns on
No Can you see anything in the screen? Yes
No
Can you see OSD menu running in the screen?
Yes
No
Check the Power Cord
Check Cables connected to Main Board. If necessary, replace the Main Board
Can you see Digital Channel broadcast ? No
Replace the Main Board
Yes Does the LAMP turn on?
1) Check the DVI Cable connected between the Main Board and the DMD Board. If necessary, replace DVI Cable.
Check Cables connected to DMD Board. If necessary, replace DMD Board.
1) DVI Cable
No No
Check if CN2 Power are supplied.
Yes
2) DMD Fan
2)
Replace LAMP Check if DMD Fan is running? Yes
Check Cables connected to Main Board. If necessary, Replace Main Board.
No Check Cables connected to BALLAST. If necessary, replace BALLAST.
Check Cables connected to Power Board. If necessary, replace Power Board.
Check Cables connected to DMD Board. If necessary, replace DMD Board.
Samsung Electronics
6-5
Troubleshooting
6-2 Troubleshooting Procedures by Error Modes
6-2-1 Installation & Connection
: Light is On : Light is Blinking : Light is Off TIMER LAMP STAND BY/TEMP Standby state. The picture will automatically appear in about 15 seconds. Auto Timer ON/OFF has been set and the set will automatically be turned on in about 15 seconds. A cooling fan inside the set is not operating normally. Lamp cover on rear of the set is not properly shut. Check if the ventilation hole on the rear of the set is blocked, because if the inner temperature is too high, the power will shut off. LED Driver or Sub power is defective. Indication
It takes about 30 seconds for the TV to warm up, so normal brightness may not appear immediately. The TV has a fan to keep the inside lamp from overheating. You'll occasionally hear it working.
6-2-2 Protect Status
1. Attempting to turn the LED on fails repeatedly If turning the lamp on fails, the set automatically tries turning the LED on 3 times. If all attempts fail, all LED's on the front panel will blink. Check the LED,LED Driver and Sub power check the LED,LED Driver and Sub SMPS and replace them if necesscary.
6-6
Samsung Electronics