Samsung PN15VT / VO Service Manual

COLOR MONITORPN15VT / VOPN15HT / HOManualSERVICECOLOR MONITOR CONTENTS1. Precautions2. Product Specifications3. Disassembly & Reassembly4. Alignme

4-1-1 Before Making Adjustments4-1-1 (a) ORIENTATIONWhen servicing, always face the monitor to theeast.4-1-1 (b) MAGNETIC FIELDSWhenever possible, use

4-1-3 Connecting the SoftJigConnect the monitor to the signal generator and/or PC as illustrated in Figures 4-1 and 4-2.Note: The signal cable connect

4-2-1 HIGH VOLTAGE ADJUSTMENT (Only HT/HO)Signal: 800 x 600 (54 kHz/85 Hz)Display image: Full White PatternContrast: Maximum Brightness: Maximum Limit

4-2-3 (c) HORIZONTAL POSITION ADJUSTMENTCONDITIONSScanning frequency: 54 kHz/85 Hz Display image: Crosshatch patternUse control bar after selecting “H

4-2-7 Parallelogram AdjustmentCONDITIONSScanning Frequency: 54 kHz/85 HzDisplay image: Crosshatch patternBrightness: MaximumContrast: MaximumUse contr

CAUTION : Check below condition before coloradjustment Video signal : Analog 0.7Vp-p (at 75 Ω)Sync : TTL level (H, V seperatesignal)* Select “Color” i

Display image: Back raster patternFull White PatternX-Y Coordinates: x = 0.283 ± 0.015,y = 0.298 ± 0.015ABL Luminance Refer to 4-3-2(c)Brightness: Max

Memo4 Alignment and Adjustments4-8 PN15VT/VOPN15HT/HO

PN15VT/VOPN15HT/HO5-15 Troubleshooting5-1 Parts Level TroubleshootingNotes: Check the following circuits.• No raster appears: Power circuit, Horizonta

5 Troubleshooting5-2 PN15VT/VOPN15HT/HO5-1-2 DPMS FailureMake No H/V Sync.(power off mode)Check signal source H/V Sync. video level.LED blinks?Check I

WARNINGS1. For continued safety, do not attempt to modify thecircuit board.2. Disconnect the AC power before servicing.3. When the chassis is operatin

5 TroubleshootingPN15VT/VOPN15HT/HO5-35-1-3 H_Deflection FailureDoes Horizontal pluse signalappear at at Pin 26 of IC401?Check IC401.YesNoDoes 20 Vp-p

5 Troubleshooting5-4 PN15VT/VOPN15HT/HO5-1-5 H_Lin. FailureIC201 Pin 21 voltage varies withdifferent H_Lin. DAC values?IC603 Pin 14 voltage varies wit

5 TroubleshootingPN15VT/VOPN15HT/HO5-55-1-8 Side Pin or Trap FailureIC401 Pin 24 output exists?YesCheck and replace IC401.Refer to 5-1-7 Abnormal H_Si

5 Troubleshooting5-6 PN15VT/VOPN15HT/HO5-1-11 V Deflection Failure13V and –10V lines are on?IC401 Pin 23 output exists?Check and replace IC401.YesYesN

5 TroubleshootingPN15VT/VOPN15HT/HO5-75-1-13 High Voltage FailureIC401 Pin 28 OSC pulse exists?Q402 Gate driving pulse exists?Check and replace Q401.Y

5 Troubleshooting5-8 PN15VT/VOPN15HT/HO5-1-15 Dynamic Focus FailureT502 Pin 6 output is right?YesReplace the C432.NoT502 Pin 1 input is right?Check an

5 TroubleshootingPN15VT/VOPN15HT/HO5-95-1-16 No VideoIC101 Pin 5, 6 and 7 inputs are right?IC101 Pin 18, 19 and 20 outputs are right?Check I2C bus and

5 Troubleshooting5-10 PN15VT/VOPN15HT/HO5-1-17 Micom FailureIC201 Pin 11 input voltage is 5V?IC201 Pin 13 and 14inputs are right?Check C202, C203 and

5 TroubleshootingPN15VT/VOPN15HT/HO5-115-1-18 OSD FailureIC104 Pin 5 input is right?IC104 Pin 10 input is right?Check CN102 Pin 8.YesYesNoCheck CN102

5 Troubleshooting5-12 PN15VT/VOPN15HT/HO5-1-19 User Control FailureDoes the DC level change atPin 36 of IC201 when you push thebutton S/W?YesCheck the

1. Servicing precautions are printed on the cabinet,and should be followed closely.2. Always unplug the unit’s AC power cord from theAC power source b

5 TroubleshootingPN15VT/VOPN15HT/HO5-135-2 General Troubleshooting5-2-1 No PictureLED blinks?LED is green color?Check Micom.Check G2 voltage, high vol

5 Troubleshooting5-14 PN15VT/VOPN15HT/HO5-2-3 Missing ColorProper Video levels areon CN101 (D-Sub) Pin 1, 3 and 5?Proper Video signal ison all cathode

5 TroubleshootingPN15VT/VOPN15HT/HO5-15G2 voltage is right?Blank pulse is on Pin 3 of IC401?Check IC401.YesYesNoCheck D502 and Adjust G2.NoV_FLB pulse

5 Troubleshooting5-16 PN15VT/VOPN15HT/HOSignals are right?Signals at Pin 28 and 29 of IC201 are right?Check IC201.YesYesNoCheck Video CableNoSignals a

5 TroubleshootingPN15VT/VOPN15HT/HO5-17The convergence is now within spec.?Readjust convergence.NoNoDoneYesThe convergence is nowwithin spec.?DoneChan

5 Troubleshooting5-18 PN15VT/VOPN15HT/HOImproved focus?Check focus leads from FBT to CRT Socket.Check the CRT Socket.NoAging monitor and check for foc

PN15VT/VOPN15HT/HO6-16 Exploded View and Parts List6-1 PN15VT/HT

6-2 PN15VO/HO6 Exploded View & Parts List6-2 PN15VT/VOPN15HT/HO

6 Exploded View and Parts List6-1-1 Front Cover & CRT Ass’y (PN15VT/HT)PN15VT/VOPN15HT/HO6-3

6-1-2 Chassis & Stand Ass’y (PN15VT/HT)6 Exploded View & Parts List6-4 PN15VT/VOPN15HT/HO

PN15VT/VOPN15HT/HO2-12 Product Specifications2-1 SpecificationsPicture Tube: 15-Inch (38 cm): 13.8-inch (35 cm) viewable,Full-square flat-face tube, 9

6-1-3 Rear Cover Ass’y (PN15VT/HT)6 Exploded View & Parts ListPN15VT/VOPN15HT/HO6-5

6 Exploded View & Parts List6-6 PN15VT/VOPN15HT/HO6-2-1 Front Cover & CRT Ass’y (PN15VO/HO)

6-2-2 Chassis & Stand Ass’y (PN15VO/HO)6 Exploded View & Parts ListPN15VT/VOPN15HT/HO6-7

6-2-3 Rear Cover Ass’y (PN15VO/HO)6 Exploded View & Parts List6-8 PN15VT/VOPN15HT/HO

PN15VT/VOPN15HT/HO7-115_NOR 3704-001014 SOCKET-CRT 12P,22.5PI,26.5PI,SNC403 2202-002149 C-CERAMIC,MLC-RADIAL 0.82NF,2%,50V,NPO,TP,5.1X3.2X6.4MM,5C409

SH/BTM+SH/LMF6003-000010 SCREW-TAPTITE BWH,+,B,M3,L10,ZPC(YEL),SWRCH1 SNASH/VID 6502-000001 CABLE CLAMP DAWH-5NB,D15,L35,NTR,NYLON66 SNASH/VID BH39-00

C220 2401-002075 C-AL 4.7uF,20%,50V,GP,TP,5x11,5C301 2301-001049 C-FILM,MPEF 150nF,5%,100V,TP,10.5x5x14.5,5C302 2305-000412 C-FILM,MPEF 470nF,5%,63V,T

C618 2401-000039 C-AL 1000uF,20%,16V,GP,TP,10x16,5C619 2201-000469 C-CERAMIC,DISC 0.33nF,10%,500V,Y5P,TP,5.5x3,5C620 2401-000540 C-AL 150uF,20%,63V,LZ

D611 0402-001194 DIODE-RECTIFIER UG2D,200V,2A,DO-204AC,TPD612 0402-000546 DIODE-RECTIFIER TVR10G,400V,1.0A,DO-41,TPD614 0402-000546 DIODE-RECTIFIER TV

J24 BH39-40305U CBF HARNESS 52MM,AWG22(0.6PI),-,-,AWG22(0. SNAJ3 BH39-40305U CBF HARNESS 52MM,AWG22(0.6PI),-,-,AWG22(0. SNAJ4 BH39-40305U CBF HARNESS

2 Product Specifications2-2 PN15VT/VOPN15HT/HO2-2 Pin Assignments515Figure 2-1. Male Type Figure 2-2. Male TypeSyncTypePin No.MacintoshSeparate1234567

JP47 BH39-40305U CBF HARNESS 52MM,AWG22(0.6PI),-,-,AWG22(0. SNAJP51 BH39-40305U CBF HARNESS 52MM,AWG22(0.6PI),-,-,AWG22(0. SNAJP52 BH39-40305U CBF HAR

R106 2001-000522 R-CARBON 22KOHM,5%,1/8W,AA,TP,1.8X3.2MMR107 2001-000281 R-CARBON 100OHM,5%,1/8W,AA,TP,1.8X3.2MMR108 2001-000281 R-CARBON 100OHM,5%,1/

R340 2001-000908 R-CARBON 62KOHM,5%,1/8W,AA,TP,1.8X3.2MMR402 2001-000429 R-CARBON 1KOHM,5%,1/8W,AA,TP,1.8X3.2MMR404 2004-001022 R-METAL 5.6Kohm,1%,1/4

7 Electrical Parts List7-10 PN15VT/VOPN15HT/HOLoc. No. Code No. Description Specification RemarksR600 2001-001129 R-CARBON(S) 330KOHM,5%,1/2W,AA,TP,2.

VR401 2103-000493 VR-SEMI 5Kohm,30%,1/10W,SIDEX201 2801-000005 CRYSTAL-UNIT 8MHz,50ppm,28-AAM,S,35ohm,TPZD101 0403-000509 DIODE-ZENER MTZJ5.6B,5.6V,5.

7 Electrical Parts List7-12 PN15VT/VOPN15HT/HOCRT BH03-10014A CRT-SN 15,0.28,M36KUM35X02,MS-GUN,0.33/6.0/0.77/7.5PBA UNIT BH94-00224A ASSY PCB PN15VO-

C409 2306-000147 C-FILM,MPPF 1uF,5%,250V,BK,26x24x15,22.5mmC430 2306-000147 C-FILM,MPPF 1uF,5%,250V,BK,26x24x15,22.5mmC512 2201-000020 C-CERAMIC,DISC

SH/BTM+PCB 6003-000010 SCREW-TAPTITE BWH,+,B,M3,L10,ZPC(YEL),SWRCH1 SNASH/BTM+SH/LMF6003-000010 SCREW-TAPTITE BWH,+,B,M3,L10,ZPC(YEL),SWRCH1 SNASH/VID

C133 2201-000119 C-CERAMIC,DISC 100nF,+80-20%,50V,Y5V,TP,8x3,5C134 2201-000119 C-CERAMIC,DISC 100nF,+80-20%,50V,Y5V,TP,8x3,5C135 2201-000264 C-CERAMIC

C438 2401-001914 C-AL 1uF,20%,50V,BP,TP,5x11,5C439 2301-000016 C-FILM,PEF 22nF,5%,100V,TP,7.2x4.5x9.0mm,C443 2301-000016 C-FILM,PEF 22nF,5%,100V,TP,7.

2 Product SpecificationsPN15VT/VOPN15HT/HO2-3QRSPOVideoSyncSyncHorizontalVerticalCDEPOBAVideoSyncSyncSeparate Sync2-3 Timing ChartThis section of the

CG03 2201-000119 C-CERAMIC,DISC 100nF,+80-20%,50V,Y5V,TP,8x3,5CG04 2305-000004 C-FILM,MPEF 220nF,10%,100V,TP,12.7x16,5mmCN304 3711-000197 CONNECTOR-HE

DG02 0401-000005 DIODE-SWITCHING 1N4148,100V,200mA,DO-35,TPDG03 0401-000004 DIODE-SWITCHING 1SS244,250V,625mA,DO-34,TPDG04 0401-000004 DIODE-SWITCHING

JP_DHHS BH39-40305U CBF HARNESS 52MM,AWG22(0.6PI),-,-,AWG22(0. SNAJP1 BH39-40305U CBF HARNESS 52MM,AWG22(0.6PI),-,-,AWG22(0. SNAJP100 BH39-40305U CBF

JP38 BH39-40305U CBF HARNESS 52MM,AWG22(0.6PI),-,-,AWG22(0. SNAJP39 BH39-40305U CBF HARNESS 52MM,AWG22(0.6PI),-,-,AWG22(0. SNAJP40 BH39-40305U CBF HAR

Q413 0501-000581 TR-SMALL SIGNAL 2N3906,PNP,625mW,TO-92,TP,100-300Q414 0501-000586 TR-SMALL SIGNAL KSC945,NPN,250mW,TO-92,TP,120-240Q415 0501-000586 T

R217 2001-000281 R-CARBON 100OHM,5%,1/8W,AA,TP,1.8X3.2MMR218 2001-000281 R-CARBON 100OHM,5%,1/8W,AA,TP,1.8X3.2MMR219 2001-000290 R-CARBON 10KOHM,5%,1/

R435 2001-000786 R-CARBON 47KOHM,5%,1/8W,AA,TP,1.8X3.2MMR436 2001-000449 R-CARBON 2.2KOHM,5%,1/8W,AA,TP,1.8X3.2MMR437 2001-000786 R-CARBON 47KOHM,5%,1

R608 2001-000281 R-CARBON 100OHM,5%,1/8W,AA,TP,1.8X3.2MMR609 2002-001056 R-COMPOSITION 180Kohm,2%,1/4W,AA,TP,2.5x6.5mmR610 2002-001056 R-COMPOSITION 1

TP501 6042-000002 EYELET ID1.5,OD2,L3.1,SN,BSS3-E/EH SNAVR401 2103-000493 VR-SEMI 5Kohm,30%,1/10W,SIDEX201 2801-000005 CRYSTAL-UNIT 8MHz,50ppm,28-AAM,

7 Electrical Parts List7-26 PN15VT/VOPN15HT/HOLoc. No. Code No. Description Specification Remarks7-4 Others (PN15HT/HO)CRT BH03-00005A CRT-TMM36LGE12

2 Product Specifications2-4 PN15VT/VOPN15HT/HOMemo

8 Block Diagrams8-1 PN15VT/VOPN15VT/VOPN15HT/HO8-1SCREENRGBVIDEO BOARD TO D-COILON THE CRT VIDEO INPUTH/V SYNCVIDEO OUTPUTIC103RGB - CUTOFFIC

8-2 PN15HT/HO8 Block Diagrams8-2 PN15VT/VOPN15HT/HOSCREENRGBVIDEO BOARD TO D-COILON THE CRT VIDEO INPUTH/V SYNCVIDEO OUTPUTIC103RGB - CUTOFFI

PN15VT/VOPN15HT/HO9-115 PIND-SUBrefer to pinassignmentofproduct spec.9 Wiring Diagram

Memo9 Wiring Diagrams9-2 PN15VT/VOPN15HT/HO

PN15VT/VOPN15HT/HO10-117171 23947856222211101010 Schematic Diagrams10-1 Main Part Schematic Diagram (PN15VT/VO)

10 Schematic Diagrams10-2 PN15VT/VOPN15HT/HO1100 V (IC601, #1)CH1 P-P = 100 V CH1 RMS = 350.2 V2100V (IC601, #1)CH1 P-P = 100V CH1 RMS = 325.8 V35.00

10 Schematic DiagramsPN15VT/VOPN15HT/HO10-310-2 Video Part Schematic Diagram (PN15VT/VO)1918141520162123

10 Schematic Diagrams10-4 PN15VT/VOPN15HT/HO141.00 V (IC101 #12,14,16)150.5 V (IC101 #18,19,20)1620.0 V (IC103, #1, 2, 3)182.00 V (IC104, #5)192.00 V

10 Schematic DiagramsPN15VT/VOPN15HT/HO10-5171 234785622221110131312910-3 Main Part Schematic Diagram (PN15HT/HO)

10 Schematic Diagrams10-6 PN15VT/VOPN15HT/HO1100 V (IC601, #1)CH1 P-P = 100 V CH1 RMS = 350.2 V2100V (IC601, #1)CH1 P-P = 100V CH1 RMS = 325.8 V35.00

3-1-1 Before making Disassembly1. Disconnect the power cord from the monitor.2. With a pad beneath it, stand the monitor on itsfront with the screen f

10 Schematic DiagramsPN15VT/VOPN15HT/HO10-710-4 Video Part Schematic Diagram (PN15HT/HO)19181415 20162123

10 Schematic Diagrams10-8 PN15VT/VOPN15HT/HO141.00 V (IC101 #12,14,16)150.5 V (IC101 #18,19,20)1620.0 V (IC103, #1, 2, 3)182.00 V (IC104, #5)192.00 V

Samsung Electronics Co.,Ltd.416, Maetan-3Dong, Paldal-Gu, Suwon City, Kyungki-Do, Korea.Tel : +82-31-200-7920 Fax : +82-31-200-7802Printed in Korea

3-1-3 Removing the CRT Socket PCB1. Complete all previous steps.2. Lift up the Video Spring and remove the CRTSocket PCB from the CRT.3. Disconnect al