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Troubleshooting

Samsung Electronics

4-1

4.  Troubleshooting

4-1  Troubleshooting

4-1-1  First Checklist for Troubleshooting

1.  Check the various cable connections first.

-  Check to see if there is a burnt or damaged cable.

-  Check to see if there is a disconnected or loose cable connection.

-  Check to see if the cables are connected according to the connection diagram.

2.  Check the power input to the Main Board.

3.  Check the voltage in and out between the SMPS ↔ Main Board, between the SMPS ↔ X, Y Main Board, and between the

 

Logic Boards.

Содержание PN50A650T1FXZC

Страница 1: ...FXZC PN58A650T1FXZC PLASMA DISPLAY TV CONTENTS 1 Precaution 2 Product Specification 3 Disassembly Reassembly 4 Troubleshooting 5 Exploded View Part List 6 Wiring Diagram Refer to the service manual in the GSPN see the rear cover for the more information PN50A650T1F PN58A650T1F ...

Страница 2: ...stic law GSPN Global Service Partner Network Area Web Site North America service samsungportal com Latin America latin samsungportal com CIS cis samsungportal com Europe europe samsungportal com China china samsungportal com Asia asia samsungportal com Mideast Africa mea samsungportal com Samsung Electronics Co Ltd Apr 2008 Printed in Korea AA82 05287A ...

Страница 3: ... 2 1 2 2 Specifications Analysis 2 3 2 3 Accessories 2 4 3 Disassembly Reassembly 3 1 Overall Disassembly Reassembly 3 1 4 Troubleshooting 4 1 Troubleshooting 4 1 4 2 Adjustment 4 8 4 3 Upgrade 4 21 5 Exploded View Part List 5 1 PN50A650T1FXZC Exploded View 5 1 5 2 PN58A650T1FXZC Exploded View 5 3 5 3 PN50A650T1FXZC Service Item 5 5 5 4 PN58A650T1FXZC Service Item 5 6 6 Wiring Diagram 6 1 Overall ...

Страница 4: ... insulated transformers the product can only be repaired safely when the chassis is connected to the earth end of the AC power source To make sure the AC power cord is properly connected follow the instructions below Use the voltmeter to measure the voltage between the chassis and the earth ground If the measurement is over 1 0V unplug the AC power cord and change the polarity before re inserting ...

Страница 5: ...eplaced with another irregular one the safety or protective features will be lost even if the new one has a higher voltage or more watts Critical safety parts should be bracketed with Use only regular parts for replacements in particular flame resistance and dielectric strength specifications Irregular parts or materials may cause electric shock or fire Precaution 1 2 Samsung Electronics ...

Страница 6: ...istance between the blade of the AC plug and that of the conductive material should be more than 1 7 Any B interlock should not be damaged If the metal heat sink is not properly installed no connection to the AC power should be made 8 Make sure the grounding lead of the tester is connected to the chassis ground before connecting to the positive lead The ground lead of the tester should be removed ...

Страница 7: ...ns for soldering purposes 6 Use only anti static solder removal devices Most solder removal devices do not support an anti static feature A solder removal device without an anti static feature can store enough static electricity to cause damage to the ESD 7 Do not remove the ESD from the protective box until the replacement is ready Most ESD replacements are covered with lead which will cause a sh...

Страница 8: ...ositioning the product Also check the antenna cable or the external connectors if they are fully unplugged Damage to the cord may cause fire or electric shock 6 Keep the antenna far away from any high voltage cables and install it firmly Contact with the high voltage cable or the antenna falling over may cause fire or electric shock 7 When connecting the RF antenna check for a DTV receiving system...

Страница 9: ...1 6 Samsung Electronics MEMO ...

Страница 10: ...0 2 x 830 6 x 319 9 mm with stand 55 5 34 0 3 8 inches 1407 7 x 862 3 x 95 0 mm without stand 55 4 x 36 5 x 13 6 inches 1407 7 927 9 344 7 mm with stand Weight 91 3 lbs 41 4kg with stand 82 5 lbs 37 4kg without stand 138Ibs 62 5kg with stand 126Ibs 57 3kg without stand Voltage AC 100 240V 60Hz 550W AC 100 240V 60Hz 670W PC Resolution 1920 H x 1080 V ANTENNA input ANT AIR CABLE IN 75Ω unbalanced VI...

Страница 11: ...ck on your TV and the Digital Audio Input on the Home Theater Connect only one Home Theater When following the connection above the Optical jack only outputs 2 channel audio You will only hear sound from the Home Theater s Front Left and Right speakers and the subwoofer If you want to hear 5 1 channel audio connect the DIGITAL AUDIO OUT OPTICAL jack on the DVD player or Cable Satellite Box ie Anyn...

Страница 12: ...tion 1920 x 1080 1920 x 1080 PDP Module Samsung SDI 50 FHD WF3 5 Samsung SDI 50 FHD WF2 Screen Size 50 50 Picture ratio 16 9 16 9 Dimensions WxHxD 48 4 x 30 3 x 3 7 inches 50 7 x 29 1 x 3 72 inches Weight 91 3 lbs 41 4kg 107 lbs 49kg Power consumption 550w 520w Picture Brightness 1300Cd m2 1 300 Cd m2 Contrast Ratio 20000 1 15 000 1 Picture Enhacer FBE3 DNIe FBE2 Comb Filter Audio Equalizer 5 Band...

Страница 13: ... not to damage the cables Take care not to scratch the Glass Filter in the front Assemble the boards in the reverse order of the disassembly The plasma must be layed down on a flat padded surface for disassembly and reassembly 3 1 1 Separation of ASSY STAND P BASE Part Name Description Description Photo Stand Remove 6 screws PH WSP S M4 L40 ZPC BLK SWRCH18A Pull the stand down to remove it from th...

Страница 14: ...crews PH WWP M3 L8 NI PLT Remove the Main Board 3 1 4 Separation of FILTER EMI AC LINE Part Name Description Description Photo FILTER EMI AC LINE Detach connector from SMPS Remove a screws FH M3 L10 NI PLT SWRCH18A FP Remove FILTER EMI AC LINE 3 1 5 Separation of BRACKET PCB Part Name Description Description Photo Bracket PCB Remove 4 screws BH S M4 L10 ZPC BLK SWRCH18 Remove BRACKET PCB ...

Страница 15: ... 3 1 7 Separation of ASSY p speaker Part Name Description Description Photo Holder Module Remove 4 screws BH WP B M4 0 L 12 ZPC BLK SWRCH18A Remove p speaker 3 1 8 Separation of HOLDER MODULE Part Name Description Description Photo Holder Module Remove 4 screws FH M3 L10 NI PLT SWRCH18A FP Remove 4 screws BH PT S Tite M4 L10 ZPC BLK SWRCH18A Plastic washer Remove Holder Module Please lay the PDP p...

Страница 16: ...8A Remove the SMPS Wear gloves when handling the power board as there may be some remaining electrical charge in the capacitor Specifically avoid touching any part of the capacitor 3 1 10 Separation of ASSY PDP MODULE P LOGIC MAIN BOARD Part Name Description Description Photo Logic Board Detach all connectors from the Logic Main Board Remove 4 screws PH WWP M3 L8 NI PLT SWRCH18A Remove the Logic M...

Страница 17: ...P X MAIN BOARD Part Name Description Description Photo Flat Cable Detach all Connectors from the X Main Board To separate the Flat Cable of the X Board press the upper and the lower sides of the connector X Main Board Remove 5 screws PH WWP M3 L8 NI PLT SWRCH18A Remove the X Main Board ...

Страница 18: ...n Description Photo Flat Cable Detach the 6 scan board connectors from the panel by pulling the holder from both the top and bottom ends Y Scan Board Remove 7 screws PH WWP M3 L8 NI PLT SWRCH18A Y Main Board Detach all connectors from the Y Main Board Remove 8 screws PH WWP M3 L8 NI PLT SWRCH18A Remove the Y Main Board ...

Страница 19: ...tion Description Photo Panel Brackets Remove 3 screws BH B M4 L3 ZPC BLK Remove 4 screws BH S M4 L10 ZPC BLK Remove the Side Panel Brackets 3 1 14 Separation of ASSY PCB FUNCTION Part Name Description Description Photo Function Board Detach the all connectors from the buffer board Remove the Function Board ...

Страница 20: ...MEMO 3 8 Samsung Electronics ...

Страница 21: ...first Check to see if there is a burnt or damaged cable Check to see if there is a disconnected or loose cable connection Check to see if the cables are connected according to the connection diagram 2 Check the power input to the Main Board 3 Check the voltage in and out between the SMPS Main Board between the SMPS X Y Main Board and between the Logic Boards ...

Страница 22: ...S is not functioning In this case check the following Check the internal cable connection Check the fuses Check the output voltages of the SMPS Replace the Main Board Troubleshooting Procedures 1 2 4 5 3 Check that the AC power cord is connected Connect the AC power cord If LED is set up as being ON when POWER ON check the ligt on in LED Is the AC Inlet socket connected Check the connection betwee...

Страница 23: ...efective assemblies by connecting the cables one by one Troubleshooting Procedures 1 Check that the Va Vs voltage of SMPS match the voltages marked on the module label Replace the SMPS Did problem improve Did problem improve Did problem improve Yes No Did problem improve Did problem improve Replace the Main Board Replace the Y Main Board Replace the X Main Board Replace the Logic Board Replace the...

Страница 24: ...ing part of the Main Board is not functioning Speaker defect Troubleshooting Procedures 1 2 3 3 Is the cable connection between the Main Board and the speaker properly connected Cable Connection Check that the voltage of No 7 8 pin of SMPS CN801 has 12V Yes No Is the speaker output terminal of the Main Board normal Yes Replace the Speaker Yes Replace the SMPS No Replace the Main Board No ...

Страница 25: ...onding upper lower buffers E F or G COF defect burnt Replace the module A green screen appears when the TV is turned on The Scale is not reseting Replace the Main board The OSD box appears but there is no text Incorrect program version Check the version of each program Replace the Main board A blank upper or lower block appears on the screen Upper Lower Y Buffer defect Replace the corresponding up...

Страница 26: ...icture does not appear Replace the Main board A vertical green line appears on the screen The SMPS voltage is incorrect Adjust the SMPS voltage according to the voltage printed on the module label Dim screen blurred in red X Main board defect Replace the X Main board A blank screen appears Replace the Y Main board ...

Страница 27: ... MAIN SCAN UPPER Upper screen is blank 6 ASSY PDP MODULE P X MAIN SCAN LOWER Lower screen is blank 7 ASSY PDP MODULE P ADDRESS E BUFFER Corresponding Buffer Board block screen is blank 8 ASSY PDP MODULE P ADDRESS F BUFFER Corresponding Buffer Board block screen is blank 9 ASSY PCB MISC MAIN No Power Abnormal screen for each input source PIP screen trouble Sound trouble 10 ASSY BOARD P FUNCTION IR ...

Страница 28: ...placement of Board If adjustment equipment is available PDP Option of Factory Mode set the Factory Data Type item as the suitable value of relevant model Adjust Calibration of Factory Mode for each mode Adjust White Balance of Factory Mode If adjustment equipment is not available Write down the value of HDMI White Balance of Factory Mode before replacing Board PDP Option of Factory Mode set the Fa...

Страница 29: ... to the higher level mode Using the Numeric 0 9 keys you can select a channel Using the SOURCE key you can switch AV modes 5 Initial SERVICE MODE DISPLAY State The version of the firmware displayed at the bottom of the screen may differ and the firmware is subject to change for the improvement of product functions If you have adjusted the settings in Service Mode you have to reset the product Opti...

Страница 30: ...trum 2 HDMI Delay Time 600ms WB Reset OFF SSpectrum Period 1000ns HDMI FLTCNT SIG 300ms EER Reset Dimming Selection HDMI FLTCNT LOS 300ms RS 232 jack Debug UNSTABLE BAN CNT 2500ms Gamma 0 88 HDMI Err Cnt 2 LVDS OUT Format PDP Wall Calib Panel Display Time 1Hr Watchdog Count 0 Panel Time Reset Out Clock INV CLK_INV Mute Time RF 600ms Out Clock Phase 4 Shop Mode Aft F R OFF SUB MICOM DOWN OFF PC Mod...

Страница 31: ...ffset Movie Tint W2_Boffset Movie Backlight NOR_Rgain NOR_Bgain ITEM Standard Contrast 95 Standard Brightness 45 Standard Sharpness 50 Standard Color 50 Standard Tint 0 Standard Backlight 7 ITEM manual AGC OFF Gain2 5 MIN_HWIDTH 7 Gain3 5 MAX_HWIDTH 20 Gain4 5 TH_HIGH 7 Gain5 5 TH_SUPER 26 Gain6 5 Noise Level 127 Gain7 2 Low Gain 74 Gain8 2 Middle Gain 80 LTI_Gain 2 High Gain 80 ECTI_Gain 2 Local ...

Страница 32: ...OFF SAP High Threshold 70h SAP Low Threshold 30h Melody Volume 10 Audio Delay 36 STAAmp Vol 29h STA Limit Att 9h STA Limit Rel fh STA Post Scale 55h STA Speaker EQ ON Item Dynamic CE OFF Dynamic Dimming ON LBE Y_MEAN 445 Item LNA PLUS ON RF_dB0_TH 1 RF_dB1_TH 3 RF_dB2_TH 5 RF_dB3_TH 18 NR1_Coring 0 NR2_Coring 4 NR3_Coring 6 NR4_Coring 8 Item Hotel Mode OFF Power On Channel Power On Band Power On V...

Страница 33: ...m Pixel Shift Test OFF Logic D L OFF Panel Pattern Sel 0 Panel Type B1 Panel Inch 50 FHD Panel Version W2 Panel Temperature 53 Logic SW Version 70208 Checksum 4543 MB SW MB Offset1 Ve Control Module Running Time FRC Mode FRC Bypass FRC DBG MarkOn FRC MD Force DRC Item Select Log Type DEFECT View Log Delete Log ...

Страница 34: ... Video MODE 2 3 Pattern Pattern 24 Chess Pattern 4 Use Equipment K 7256 or Equipment of equality level 5 Work order 1 Enter by Factory Mode select 2 WB Adjust 2 Select CALIBRATION 3 Select AV CALIBRATION again in CALIBRATION MENU 4 After Completing Calibration come out Av success OSD on the screen bottom side for about 3 seconds Source AV PAL composite Component 1280 720 60Hz PC 1024 768 60Hz Ches...

Страница 35: ...ut to HDMI mode Enter the White Balance menu of service mode Contact CA 210 sensor to glass filter Fixed Position of CA210 Probe Adjust the low light Adjust Sub Bright LBE to set the Y value Adjust R Offset x and B Offset y to the color coordinates Do not adjust G Offset data Adjust the high light Adjust Sub Contrast LBE to set the Y value Adjust R Gain x and B Gain y to the color coordinates Do n...

Страница 36: ...78 285 7 3 cd m 2 2 Ft 10 500 0 HDMI 720P H L 278 285 Don t Control Sub_CT 133 10 500 0 L L 278 285 7 3 cd m 2 2 Ft 10 500 0 58 Input mode CA 210 x y Y L T K MPCD CVBS NTSC H L 278 285 Don t Control Sub_CT 133 10 500 0 L L 278 285 6 9 cd m 2 Ft 10 500 0 COMP 720P H L 278 285 Don t Control Sub_CT 133 10 500 0 L L 278 285 6 9 cd m 2 Ft 10 500 0 HDMI 720P H L 278 285 Don t Control Sub_CT 133 10 500 0...

Страница 37: ...s Va voltage check and adjust 3 ASSY PDP MODULE P X MAIN Not to be adjusted 4 ASSY PDP MODULE P Y MAIN 5 ASSY PDP MODULE P LOGIC MAIN 6 ASSY PDP MODULE P Y MAIN SCAN UPPER 7 ASSY PDP MODULE P X MAIN SCAN LOWER 8 ASSY PDP MODULE P ADDRESS E BUFFER 9 ASSY PDP MODULE P ADDRESS F BUFFER 10 ASSY BOARD P FUNCTION IR When replacing the SMPS or PDP panel you have to check the voltage printed on the panel ...

Страница 38: ...t the voltage referring to the voltage label printed on the panel If you do not adjust the voltage an abnormal discharge symptom may appear Value Board Adjustment Vs 202 SMPS Va 57 Vset Ve 95 Vsc 195 2 A point of adjusting SMPS MAIN voltage Va Adjustment Va Test Point Vs Test Point Vs Adjustment SMPS Voltage Label ...

Страница 39: ...195V 210V OA 2 2A 3A 15A 1 5 230V 3 7A 160V 8V p p 15Ap 2 VA 50V 60V OA 1A 3A 10A 1 5 72V 4 5A 45V 5V p p 10Ap 3 VG 15V FIX OA 0 5A 1A 1 5A 5 16V 1 2A 13V 120mV p p 4 5 3V 5 3V FIX OA 7A 9A 12A 3 7V 10A 3 6V 100mV p p 6 12V 12V FIX OA 1 5A 2 5A 3 5A 5 13V 5A 11V 120mV p p 7 VAMP 18V FIX OA 0 5A 2 5A 3A 5 20V 5A 0 3V 180mV p p 8 STBY 5 2V FIX OA 0 5A 1A 1 5A 3 6V 5A 100mV p p ...

Страница 40: ...20 Samsung Electronics Y RR and Y FR controls Test Point Set the main reset rising 60usec falling 80usec by change the value of variable resistor 60usec 80usec Rising ramp variable resistor Falling ramp variable resistor ...

Страница 41: ...gs ADC Target Expert D Settings ADC Result Expert Gray Scale Option Byte Expert C Space White Balance Expert Others W B Movie CHECKSUM EPA Standard RESET MT5382p Font Data Viewer T SPNAUSC 0005 T SPNAUSM 0019 EDID FAIL MTK DRV 2 0 12 2 RFS T SPNAUS 20071116 2007 11 22 PANEL 50FSPU PN50A550S1FXZA 1111 0000 3008 0000 180c 00f0 0100 10 DTP LM 0053DTP LM 0053 Data of purchase 00 00 0000 FBE3 SOUND Dyn...

Страница 42: ... upgrade starts Please be careful not to disconnect the power or remove the USB drive while upgrades are being applied The TV will shut off and turn on automatically after completing the firmware upgrade When software is upgraded video and audio settings you have made will return to their default factory settings We recommend you write down your settings so that you can easily reset them after the...

Страница 43: ...MEMO Samsung Electronics 4 23 ...

Страница 44: ...View Part List Samsung Electronics 5 1 5 Exploded View Part List 5 1 PN50A650T1FXZC Exploded View T0003 M0112 M0145 T0456 M0146 M0150 T0175 T0175 M0149 T0044 M0523 M0027 T0448 M0125 M0412 T0079 M0013 T0165 T0152 ...

Страница 45: ... N A M0150 BN96 07225B ASSY BRACKET P FILTER BOTTOM P750 50 SA 1 S N A M0412 BN96 07747B ASSY BRACKET P PCB P650 50 SECC T0 6 1 S N A M0523 BN96 06695C ASSY BRACKET P SUPPORT STAND P650 50 SEC 1 S N A T0003 BN96 07224L ASSY COVER P FRONT P650 50 PC Clear PC R 1 S A T0044 BN96 07128C ASSY PDP MODULE P S50FH YB01 PL50FB003B 1 S A T0079 BN94 01819B ASSY PCB MISC MAIN PN50A650T1FXZA F47A P 1 S A T0152...

Страница 46: ...Exploded View Part List Samsung Electronics 5 3 5 2 PN58A650T1FXZC Exploded View T0003 M0112 T0456 M0146 M0150 M0149 M0523 T0044 M0027 M0412 T0165 T0079 T0175 T0175 M0013 M0523 M0006 M0145 ...

Страница 47: ...T P FILTER TOP Spinel 58 SAZ 1 S N A M0150 BN96 06704B ASSY BRACKET P FILTER BOTTOM Spinel 58 S 1 S N A M0412 BN96 06701D ASSY BRACKET P PCB Topaz 58 SECC T0 5 1 S N A M0523 BN96 06695B ASSY BRACKET P SUPPORT STAND P470 50 SE 1 S N A M0523 BN96 06805A ASSY BRACKET P WALL P750 58Inch SECC T0 2 S A T0003 BN96 06799H ASSY COVER P FRONT P750 58Inch PC PC TOC 1 S N A T0044 BN96 05638C ASSY PDP MODULE P...

Страница 48: ...30 1 M0869 BN96 08171A ASSY PDP P X MIAN UBFFER S50FH YB01 PL50 1 M2893 BN39 00802P LEAD CONNECTOR FPT5884X XAA UL1007 26 24 1 M2893 BN39 01070A LEAD CONNECTOR LVDS PN50A550S1FXZA UL202 1 T0003 BN96 07224L ASSY COVER P FRONT P650 50 PC Clear PC R 1 T0037 BN96 07134C ASSY PDP P LOGIC MAIN S50FH YB01 PL50FB0 1 T0044 BN96 07128C ASSY PDP MODULE P S50FH YB01 PL50FB003B 1 T0073 BN96 07131B ASSY PDP P X...

Страница 49: ... PDP P ADDRESS F BUFFER BO PL58FH001 1 T0040 BN96 05648A ASSY PDP P ADDRESS G BUFFER BO PL58FH001 1 T0044 BN96 05638C ASSY PDP MODULE P PDP MODULE PL58FB003A 1 T0045 BN96 05640B ASSY PDP P X MAIN BOARD PL58FH001A S58FH 1 T0045 BN96 05641A ASSY PDP P X MAIN BUFFER BOARD PL58FH001 1 T0074 BN59 00695A REMOCON TM 98B 49 AMERICA_650 1 T0079 BN94 01820A ASSY PCB MISC MAIN PN58A650T1FXZA 1 T0086 BN96 056...

Страница 50: ...MEMO 5 7 Samsung Electronics ...

Страница 51: ...4 CN5001 CN5502 CN4000 CN4002 Y BUFFER UP Y BUFFER LOW CN2001 CN2010 CN2002 CN2000 CN2007 CN2006 LOGIC BOARD CN803 CN804 CN800 CN802 CN801 SMPS DC X MAIN Y MAIN CN2701 CN2508 CN2509 CN2514 CN2500 G BUFFER E BUFFER CN2700 CN805 CN4006 U4004 CN1301 CN101 CN1501 CN401 SPEAKER IR AC INLET MAIN CN4501 CN4502 CN2008 CN2015 3 1 2 CN5404 CN5403 CN5503 CN5510 ...

Страница 52: ... Diagram 6 2 Samsung Electronics The code number of c able Lead connector can be changed see 5 Exploded View Part List Use 1 POWER 24P 2 LVDS 41P 3 ASSY INLET P Code BN39 00802P BN39 00843E BN96 07190B Photo ...

Страница 53: ...ON 5 GND 6 5 3V 7 GND 8 5 3V 9 5 3V 10 5 3V CN808 SMPS CN2508 E BUFFER Pin No Signal 1 5 3V 2 GND 3 Va CN1101 SMPS CN101 MAIN Board Pin No Signal Pin No Signal Pin No Signal 1 NC AUTO_V 9 GND_5V 17 GND_13V 2 MAIN_POWER_CONTROL 10 GND_5V 18 GND_13V 3 GND_A5V 11 GND_5V 19 GND_13V 4 A5V 12 GND_5V 20 B13V 5 GND_18V AMP 13 5V 21 B13V 6 GND_18V AMP 14 5V 22 B13V 7 18V AMP 15 5V 23 NC FAN_DET 8 18V AMP 1...

Страница 54: ... 5 GND 16 FBE_ODD_TXCLK 27 FBE_EVEN_TX2 38 SDA0 6 SDA0 17 FBE_ODD_TX3 28 FBE_EVEN_TX2 39 WP_I2C_READY 7 WP_I2C_READY 18 FBE_ODD_TX3 29 FBE_EVEN_TXCLK 40 LOGIC_RX_P 8 GND 19 FBE_ODD_TX4 30 FBE_EVEN_TXCLK 41 DDC_CTRL_L 9 FBE_ODD_TX0 20 FBE_ODD_TX4 31 FBE_EVEN_TX3 10 FBE_ODD_TX0 21 FBE_ODD_TX5 32 FBE_EVEN_TX3 11 FBE_ODD_TX1 22 FBE_ODD_TX5 33 FBE_EVEN_TX4 CN1501 MAIN Board SPEAKER Pin No Signal 1 R _O...

Страница 55: ...CN2006 Address Data 1601st 1920th connect for E Buffer board CN2007 Address Data 961st 1280th connect for G Buffer board CN2008 Y Drive control signal of Logic Board CN2010 Image signal LVDS connect 41pin of Logic board from Main Board CN2502 Address Data 1th 320th connect for E Buffer board CN2508 Va 65V 5 3V Power input connect 3Pin from SMPS CN2600 Address Data 321th 640th connect for F Buffer ...

Страница 56: ...MEMO 6 6 Samsung Electronics ...

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