Samsung HPT4254X/XAA, HPT5054X/XAA %

Troubleshooting

Samsung Electronics 4-5

""No Sound

Symptom - Video is normal but there is no sound.

Major Checklist

- When the speaker connectors are disconnected or damaged.

- When the sound processing part of the Main Board is not functioning.

- Speaker defect.

Troubleshooting

Procedures

Is the cable connection between the

Main Board and the speaker

properly connected?

Connect the cable properly or

replace the cable, if necessary.

Is the output voltage of SMPS normal?

(CN801 #13) Replace the SMPS

Replace the Main Board

Is the speaker output terminal

of the Main Board normal?

Replace the Speaker

Yes

Contents

Main $ / 0 + ( , / !"#$%#&'($!"#)&*+ Page Table of Contents 1. Precaution 1-1 Safety Precautions Page 1-2 Servicing Precautions 1-3 Static Electricity Precautions CAUTION 1-4 Installation Precautions Page 2. Product Specification 2-1 Product Specification Product Specification 2-2 Samsung Electronics Product Specification Samsung Electronics 2-3 2-2 Specifications Analysis !For the power supply and power consumption, refer to the label attached to the product. ! $: application, X: non-application 2-3 Accessories Page Page 3. Disassembly & Reassembly 3-1 Overall Disassembly & Reassembly 3-1-1 Separation of ASSY COVER P-REAR 3-1-2 Separation of ASSY PCB MISC-MAIN 3-1-3 Separation of FILTER-EMI AC LINE 3-1-4 Separation of BRACKET-PCB 3-1-5 Separation of ASSY BRACKET 3-1-6 Separation of ASSY BOARD P-SIDE AV 3-1-7 Separation of ASSY BRACKET P-WALL 3-1-8 Separation of ASSY SPEAKER P 3-1-9 Separation of ASSY BOARD P-POWER&IR 3-1-10 Separation of SMPS-PDP TV 3-1-11 Separation of ASSY PDP MODULE P-LOGIC MAIN BOARD 3-1-12 Separation of ASSY PDP MODULE P-X MAIN BOARD 3-1-13 Separation of ASSY PDP MODULE P-Y MAIN BOARD Page 3-1-14 Separation of ASSY PDP MODULE P-ADDRESS BUFFER BOARD 3-1-16 Separation of ASSY PCB FUNCTION 3-1-15 Separation of ASSY PANEL BRACKETS 4-1-1 First Checklist for Troubleshooting 4. Troubleshooting 4-1 Troubleshooting 4-1-2 Checkpoints by Error Mode "No Power "When the unit is repeatedly turned on and off % "No Picture (When audio is normal) ""No Sound % "No Video "SMPS Troubleshooting Samsung Electronics 4-7 Page Samsung Electronics 4-9 No Display [ Y-MAIN ] [ Logic Main ] LED Blinks [ X-MAIN ] 4-10 Samsung Electronics Abnormal Display [ Y-MAIN ] [ Logic Main ] Observation of abnormal display [ X-MAIN ] Samsung Electronics 4-11 %Sustain Open (some horizontal lines don't exist on screen) 'Sustain Short (some horizontal lines appear to be linked on Video) 4-12 Samsung Electronics 4-1-3 Troubleshooting Page Samsung Electronics 4-15 4-1-4 Troubleshooting Procedures by assembly <PDP 42> <PDP 50> 4-2 Adjustment 4-2-1 Service Instruction 4-2-2 How to Access Service Mode NTSC-RF 4-2-3 Factory Data Page Page Page Page Page Page Page 4-2-4 Service Adjustment - ""Color Calibration Page "White Balance Page 4-2-5 Replacements & Calibration "Voltage Adjustment Page 4-3 Upgrade 4-3-1 USB Download Method 4-3-2 How to Check the Version of the Program Page Samsung Electronics5-1 Exploded View & Part List T0074 T0268 5. Exploded View & Part List 5-1 HPT4254X/XAA Exploded View 5-2Samsung Electronics Samsung Electronics5-3 Exploded View & Part List T0074 T0268 5-2 HPT5054X/XAA Exploded View 5-4Samsung Electronics Samsung Electronics5-5 5-3 HPT4254X/XAA Service Item 5-6Samsung Electronics 5-4 HPT5054X/XAA Service Item Page Samsung Electronics 6-1 6. Wiring Diagram <42" Overall Wiring> 6-1 Overall Wiring <50" Overall Wiring> 6-2 Samsung Electronics Page Page Page 6-1-1 Connector role Page Page 7. Schematic Diagram 7-1 Circuit Description Page 7-3 CL 1_V3.3B 2 7-2 Schematic Diagram 7-2-1 MAIN POWER BLOCK 7-4 Samsung Electronics )202CI(mociM-buS oT raeN 1 F/I NOI TCNUF BUS F ) 0 A x0( I 7-2-3 SOUND PROCESSOR (MSP4450) 7-6 Samsung Electronics PMA_ NGS NOI TULOS ESION P L P 3. VI 7-2-5 NIM TUNER 1410 1 TUPNI SHVS LLAW / LETOH / GUBED D646 E232 3.3 V5A VA D702B 74 CCV_BSU 00 1 TUPNI I _V3.3B 1B mho m RE WOP_XP_PV 8 n0 1 6527-65XP-PVS TESTMODE INTN SCL TD1M GM5-IB0 2 39A6ME n 7 . 4 1RDD_XL _ XREF 5B 8 S CCV 7-2-13 LAKE (I2C & GPIO & USB & UART & INTERRUPT) 7-16 Samsung Electronics )Y D Fu01 1 7-2-14 LAKE (I2S INPUT/OUTPUT & TS-INPUT & YCbCr OUTPUT) 7-17 EKAL EK EKAL 7-2-15 LAKE (DDR MEMORY) 7-18 Samsung Electronics O Fu01 K F /I dra o B gubeD 3B . 3.3B 7-2-17 LAKE (POWER BLOCK)