Samsung CB-21S20BT, Service Manual

Page 1: ...ISION RECEIVER CONTENTS Precautions Specifications and IC Data Disassembly and Reassembly Alignment and Adjustment Troubleshooting Exploded View and Parts List Electric Parts List Block Diagram PCB Layout Diagram Wiring Diagram Schematic Diagrams 1 2 3 4 5 6 7 8 9 10 11 ...

Page 2: ...ELECTRONICS Samsung Electronics Co Ltd MAY 1998 Printed in Korea 3SCT13B 31K101 ...

Page 3: ... metal cabinets screwheads and control shafts The current measured should not exceed 0 5 milliamp Reverse the power plug prongs in the AC outlet and repeat the test Fig 1 1 AC Leakage Test 6 Antenna Cold Check With the unitÕs AC plug disconnected from the AC source connect an electrical jumper across the two AC prongs Connect one lead of the ohmmeter to an AC prong Connect the other lead to the co...

Page 4: ...ppear to have overheated or that are otherwise damaged should be replaced with parts that meet the original specifications Always determine the cause of damage or overheat ing and correct any potential hazards 15 Observe the original lead dress especially near the following areas Antenna wiring sharp edges and especially the AC and high voltage power supplies Always inspect for pinched out of plac...

Page 5: ...ssible conductive parts examples metal panels input terminals and earphone jacks 6 Insulation Checking Procedure Disconnect the power cord from the AC source and turn the power switch ON Connect an insulation resistance meter 500V to the blades of the AC plug The insulation resistance between each blade of the AC plug and accessible conductive parts see above should be greater than 1 megohm 7 Neve...

Page 6: ...ctrical charges that damage ESDs 5 Use only a grounded tip soldering iron when soldering or unsoldering ESDs 6 Use only an anti static solder removal device Many solder removal devices are not rated as Òanti staticÓ these can accumulate sufficient electrical charge to damage ESDs 7 Do not remove a replacement ESD from its protective package until you are ready to install it Most replacement ESDs a...

Page 7: ...y Picture IF Carrier Sound IF Carrier Color Sub Carrier PAL SECAM D K 1 13 21 69 PAL SECAM D K SECAM K1 38 90 32 40 34 47 SECAM K1 PAL D 2 9 13 57 PAL I 38 90 32 90 34 47 MODEL CI CII CX CK CW CS 14 Inch 20 Inch 21 Inch AC 100 260V 50 60Hz VHF UHF Telescopic dipole antenna 75 ohm unbalanced type 8 ohm 5W 5W Dual Type 16 ohm 3W Monitor Type SYSTEM PAL I UHF PAL I VHF UHF PAL B G SECAM B G PAL B G D...

Page 8: ... Chinese SZM193EE W O TTX English German French Dutch Italian Spanish Swedish Romanian Hungarian Croatian Polish Russian Czech Bulgarian Yugo Greek SZM191ER W O TTX English Russian Only for Oceania model SPM197EE TTX West English German French Dutch Italian Spanish Swedish East English Czech Croatian Romanian Hungarian Polish SZM193EV W O TTX English Vietnames Indonesian Maly Thai IC902 24C04 EEPR...

Page 9: ... 56 Z8933112PSC Pin 42 X24CO4P Pin 8 TDA8395 Pin 16 TDA4665 Pin 16 IC TRANSISTOR TRANSISTOR TDA8133 TDA8356 TDA6101Q KA7812 KA7809 KA78R05 IN G OUT TRANSISTOR TRANSISTOR 2SD1651 2SD1650 KSD5072 KSD5071 KSD1711 B C E E B C KSA815 Y KSA539 Y IC UPC574J or KA33V K6259K SAW FILTER E C B KSR1012 KSR1010 KSR2010 Fig 2 1 Semiconductor Base Diagrams ...

Page 10: ...2 4 Samsung Electronics MEMO ...

Page 11: ...3 1 Disassembly and reassembly Samsung Electronics 3 Disassembly and Reassembly 3 1 Back Cover Removal 1 After removing the 9 screws pull the cabinet backwards ...

Page 12: ...Disassembly and reassembly 3 2 Samsung Electronics 3 2 Speaker Removal 1 Loosen the 4 screws and remove the holder speakers ...

Page 13: ...3 3 Disassembly and reassembly Samsung Electronics 3 3 CRT Removal 1 Spread a soft mat on the floor Place the TV set face down 2 Remove the 4 screws mounting the CRT to the front cabinet 3 Lift the CRT ...

Page 14: ...3 4 Samsung Electronics MEMO MEMO ...

Page 15: ...eplaced set SC and PVA to 10 and 45 Factory mode SC 14 16 Inch 0 20 21 Inch 10 4 2 Factory Service Mode 4 2 1 Procedure for the Adjustment Mode 1 This mode uses the standard remote control The Service Mode is activated by entering the following remote control sequence 1 SLEEP FACTORY 2 STAND BY P STD HELP SLEEP POWER ON 2 The SERVICE FACTORY message will be displayed The Service Mode has four comp...

Page 16: ...STEP 0 63 STEP 0 63 STEP 0 63 STEP 0 128 STEP 0 63 STEP 0 63 STEP 0 7 STEP 0 3 STEP OSD ABBREVIATION AGC SBT SCT SCR RG GG BG PSL PVS PVA PHS NSL NVS NVA NHS VCO SC TSS CDL BLU FUNCTION AUTO GAIN CONTROL SUB BRIGHT SUB CONTRAST SUB COLOR RED DRIVE GAIN GREEN DRIVE GAIN BLUE DRIVE GAIN PAL VERTICAL SLOPE PAL VERTICAL SHIFT PAL VERTICAL AMPLITUDE PAL HORIZONTAL SHIFT NTSC VERTICAL SLOPE NTSC VERTICA...

Page 17: ...y by twice pressing the SLEEP FACTORY FACTORY key then white pattern will be dis played Even if the TV power is cut off the Aging Mode is not cancelled The aging mode is cancelled by repressing the FACTORY key or pressing the local CH UP DOWN key The patterns are displayed at 5 sec intervals NON TTX Micom only 4 2 4 Option Bytes In the Service Mode various can be selected via the Option Bytes 8 bi...

Page 18: ... 1997 Last State Memory PAL Table always used in the A V Mode March 12 1997 Sound system during the auto search All should be set for the system which is selected during the Factory Reset COLOR SYSTEM D2 0 0 D1 0 1 1 0 1 1 SOUND SYSTEM CK PAL ONLY NO OSD CW RF AUTO PAL SECAM NT4 43 A V AUTO PAL SECAM NT4 43 NT3 58 CB RF PAL ONLY A V AUTO PAL NT4 43 NT3 58 CS RF AUTO PAL SECAM NT4 43 NT 3 58 A V AU...

Page 19: ...el up when using TDA6107Q AMP Auto Power On NTSC 25KHz NTSC TABLE PAL 27KHz PAL TABLE Application MICOM ALL ALL BASIC LOW ALL J900 DELETE AT H ALL ALL BASIC HIGH ALL ALL ALL FIX LOW SPM 197EE ONLY used SPM 197ER English Russian Bulgarian SPM 197EG English Greek Yugosiavian ALL BASIC HIGH ALL BASIC HIGH ALL RF VOL CURVE BASIC LOW AV VOL CURVE PAL CURVE Sound system during the auto search All should...

Page 20: ...P is an OPTION during A V BASIC LOW ALL FIX LOW ALL ALL EP VERSION TDA8374A ONLY ALL FIX LOW ALL BASIC HIGH ALL BASIC HIGH ALL RF VOL CURVE BASIC LOW AV VOL CURVE PAL CURVE Sound system during the auto search All should be set for the system which is selected during the Factory Reset Note A single sound in the Byte 0 is unavailable COLOR SYSTEM D2 0 0 D1 0 1 1 0 1 1 SOUND SYSTEM CK AUTO No OSD CW ...

Page 21: ...ND J900 DELETE AT H BASIC LOW ALL BASIC HIGH SOUND SYSTEM OPTION IC201 ONE CHIP OPTION Language Option BASIC LOW BASIC HIGH BASIC HIGH RF VOL CURVE BASIC LOW AV VOL CURVE PAL CURVE Sound system during the Auto search All should be set for the sys tem which is selected during the Factory Reset Note Only available during the specifica tion of CK model in the Byte 0 SOUND SYSTEM D2 0 0 D1 0 1 1 0 1 1...

Page 22: ...L BASIC LOW ALL No SZM193EA ALL ALL ALL No SZM193EA ALL No SZM 193EA ALL BASIC HIGH ALL BASIC HIGH ALL RF VOL HIGH BASIC LOW AV VOL CURVE PAL CURVE Initial sound system during the auto search All should be for the system which is selected during the Factory Reset Note Unavailable during the CB model in the byte 0 COLOR SYSTEM D2 0 0 D1 0 1 1 0 1 1 SOUND SYSTEM CK AUTO No OSD CW RF AUTO PAL SECAM N...

Page 23: ...LE Application MICOM FIX LOW BASIC LOW FIX LOW BASIC LOW IC201 ONE CHIP OPTION FIX LOW Language option BASIC LOW BASIC HIGH BASIC HIGH ALL RF VOL CURVE BASIC LOW AV VOL CURVE PAL CURVE Initial sound system during the auto search All should be set for the system which is selected dur ing the Factory Reset Note Unavailable during the CB model in the Byte 0 COLOR SYSTEM D2 0 0 D1 0 1 1 0 1 1 SOUND SY...

Page 24: ...M BASIC LOW BASIC HIGH IC201 ONE CHIP OPTION Language option BASIC LOW India HIGH BASIC LOW Indonesia HIGH BASIC HIGH ALL RF VOL HIGH BASIC LOW AV VOL CURVE PAL CURVE Initial sound system during the auto search All should be set for the system which is selected dur ing the Factory Reset Note Unavailable during the CB model in the Byte 0 COLOR SYSTEM D2 0 0 D1 0 1 1 0 1 1 SOUND SYSTEM CK AUTO No OS...

Page 25: ...GH IC201 ONE CHIP OPTION Language option BASIC LOW India HIGH BASIC LOW Indonesia HIGH BASIC HIGH RF VOL CURVE BASIC LOW AV VOL CURVE PAL CURVE Initial sound system during the auto search All should be set for the system which is selected dur ing the Factory Reset Note Unavailable during the CB model in the Byte 0 COLOR SYSTEM D2 0 0 D1 0 1 1 0 1 1 SOUND SYSTEM CK AUTO No OSD CW RF AUTO PAL SECAM ...

Page 26: ... tuning Sharpness level up when using the TDA6107Q RGB AMP Auto Power On NTSC 25KHz NTSC TABLE PAL 27KHz PAL TABLE Application MICOM BASIC LOW IC201 ONE CHIP OPTION FIX LOW BASIC LOW BASIC HIGH BASIC HIGH ALL RF VOL CURVE BASIC LOW AV VOL CURVE PAL CURVE Initial sound system during the auto search All should be set for the system which is selected dur ing the Factory Reset Note Unavailable during ...

Page 27: ...ng Sharpness level up when using the TDA6107Q RGB AMP Auto Power On NTSC 25KHz NTSC TABLE PAL 27KHz PAL TABLE Remark BASIC LOW BASIC LOW BASIC LOW BASIC HIGH IC201 ONE CHIP OPTION FIX LOW Language option BASIC LOW BASIC HIGH BASIC HIGH ALL RF VOL CURVE BASIC LOW AV VOL CURVE PAL CURVE Initial sound system during the auto search All should be set for the system which is selected dur ing the Factory...

Page 28: ... TDA6107Q RGB AMP Auto Power On NTSC 25KHz NTSC TABLE PAL 27KHz PAL TABLE Application MICOM FIX LOW BASIC LOW FIX LOW BASIC LOW IC201 ONE CHIP OPTION FIX LOW Language option BASIC LOW BASIC HIGH BASIC HIGH ALL RF VOL CURVE BASIC LOW AV VOL CURVE PAL CURVE Initial sound system during the auto search All should be set for the system which is selected dur ing the Factory Reset Note Unavailable during...

Page 29: ...isconnected before replacing any parts 8 To protect against shock hazard use an isola tion transformer 4 3 2 Automatic Degaussing A degaussing coil is mounted around the pic ture tube so that external degaussing after moving the TV should be unnecessary But the receiver must be properly degaussed upon installation The degaussing coil operates for about 1 sec ond after the power is switched ON If t...

Page 30: ...tor PM5518 3 Use the P mode key on the remote control for the STANDARD picture 4 Adjust the Screen VR on the FBT so that the voltage on the oscilloscope becomes 130 2 5V See Fig 4 1 4 3 6 Purity Adjustment 1 Warm up the receiver for at least 20 minutes 2 Plug in the CRT deflection yoke and tighten the clamp screw 3 Plug the convergence yoke into the CRT and set in as shown in Fig 4 2 4 Input a bla...

Page 31: ... Adjustment 31m m Vertical Green Belt Fig 4 4 1 2 a Set up 1 Warm up the TV for at least 30 minutes in the Aging Mode OSD White This mode is dis played by entering the following sequence SLEEP FACTORY FACTORY 2 Input a Toshiba pattern b High Light Adjustment 1 Set SBT to 2 0 fL in the Factory Service Mode with using CA100 See Fig 4 4 2 Adjust RG BG so that the levels are suitable to each local are...

Page 32: ...nto the green Changing the angle affects the vertical lines and rotating both magnets affects the horizontal lines 7 Repeat adjustments 2 6 if necessary 8 Since the 4 pole magnets and 6 pole magnets interact the dot movement is complex Fig 4 5 Alignment and Adjustments 4 18 Samsung Electronics Fig 4 6 VCO 63 SD ON IN BELOW SET AFB RGB AFA SIGNAL DETECTOR TUNER IC201 TDA8374 IC902 IF 38 9MHz I2C BU...

Page 33: ...tment SC PVA PVS PSL PHS 1 Input a lion head pattern in the PAL channel 2 Set the SC S Correction 10 data steps and PSL 20 data steps so that the lion head circle becomes oval 3 Adjust with PVS Vertical shift Lion head pattern and mechanical centers must be aligned 4 Adjust with PVA Vertical Amplitude Top margin of the picture is 4 Fig 4 7 5 Adjust with PSL Vertical Slope Bottom mar gin of the pic...

Page 34: ...MEMO 4 20 Samsung Electronics ...

Page 35: ...Troubleshooting 5 1 No Video Raster On No Sound Yes No Open the IF Pin of Tuner Check Replace TU01 MC101 No Measure the Voltage of Each Pin of TU01 Check IC901 Pins 39 40 See No Video Sound OK See No Sound Video OK Check Replace IC901 IC201 Yes ...

Page 36: ... No Check the 125V 13 0V B Lines Check IC802 Pin 9 5V Check Replace IC801 D801 F802 Check Replace IC802 KA7630 Check IC901 Pin 18 Stand by 0V Normal 5V Check Replace IC901 Check IC901 Pin 16 4V Check Replace IC901 µ com Check IC201 Pin 40 H out Check Replace IC201 Q401 Q402 ...

Page 37: ...eck IC201 Pin 6 CVBS Check Replace IC201 Check IC201 Pins 19 20 21 Check IC201 pin 27 Y IN Check Replace IC201 Q203 Check IC501 on the CRT PCB Check Replace IC501 Check Replace R417 R505 HEATER 6 3Vrms D503 CRT G1 pin CRT V999 Yes No Check IC201 Pin 12 37 8V Check Replace IC802 KA7630 ...

Page 38: ... IC201 Check IC602 Pin 4 B 10 12 5V Check Replace Q903 Q907 Check IC602 Check Replace IC602 Check IC602 Pins 1 7 0V Check Replace R812 R813 Yes Yes No Yes Yes 5 5 No TTX No No See No Video Check IC901 Pin 31 32 33 34 35 Check Replace QT02 IC901 Check IC201 Pin 23 24 25 26 Check Replace IC201 Check IC901 Pins 24 Check Replace IC901 Yes No Yes Yes ...

Page 39: ...8U ASSY PCB FRONT A V 39 85 SCT13B MULTI 1 1 7 AA60 10002A SCREW TAPPING RH M4 L12 ZPC YEL OD1 2 1 8 AA61 40053A STOPPER PCB ALL MODEL HIPS HB WHT HB 1 1 9 3001 001034 SPEAKER 6W 8ohm 90dB 140Hz 2 1 10 6002 000514 SCREW TAPPING RH 2 M4 L15 ZPC BLK SWR 8 1 11 AA64 40408A INDICATOR LED 501E ACRYL HB CLR 1 1 12 AA64 40407A WINDOW REMOCON 501E PC VIOLET 1 1 13 AA64 10637A KNOB CONTROL 501E ABS HB BLK ...

Page 40: ...4 C FILM PEF 2 7nF 5 50V TP 7 4x3 9x13mm C252 2301 000264 C FILM PEF 4 7nF 5 50V TP 6 5X5 5X3 0X5 C253 2305 000665 C FILM MPEF 100nF 5 63V TP 7 5x4 0x5 0m C254 2305 000665 C FILM MPEF 100nF 5 63V TP 7 5x4 0x5 0m C255 2305 000665 C FILM MPEF 100nF 5 63V TP 7 5x4 0x5 0m C301 2202 000796 C CERAMIC MLC AXIAL 1nF 10 50V Y5P TP 3 C302 2202 000796 C CERAMIC MLC AXIAL 1nF 10 50V Y5P TP 3 C303 2401 003028 ...

Page 41: ...2 3711 002643 CONNECTOR HEADER BOX 4P 1R 2 5MM STRAIGH CN701 3711 000628 CONNECTOR HEADER AUTO 11P 1R 2 5mm STRAI CN802 AA27 20001L COIL DEGAUSSING 14 23 0OHM 100T L940 CW901 2503 000156 C NETWORK 100pFx4 20 50V D201 0401 000005 DIODE SWITCHING 1N4148 75V 300mA DO 35 T D204 0402 000216 DIODE RECTIFIER ERC24 06 600V 1 0A DO 20 D205 0401 000005 DIODE SWITCHING 1N4148 75V 300mA DO 35 T D209 0401 0000...

Page 42: ...281 R CARBON 100ohm 5 1 8W AA TP 1 8x3 2mm R227 2004 001234 R METAL 75Kohm 5 1 8W AA TP 1 8x3 2mm R228 2001 000832 R CARBON 510ohm 5 1 8W AA TP 1 8x3 2mm R230 2001 000793 R CARBON 47ohm 5 1 8W AA TP 1 8x3 2mm R231 2001 000563 R CARBON 27Kohm 5 1 8W AA TP 1 8x3 2mm R232 2001 000273 R CARBON 100Kohm 5 1 8W AA TP 1 8x3 2m R234 2001 000281 R CARBON 100ohm 5 1 8W AA TP 1 8x3 2mm R235 2004 001089 R META...

Page 43: ... 1 2W AA TP 3 5 SFN02 2904 001063 FILTER SAW AV 38 9MHz SIP5K TP 17dB PAL SW801 3403 000179 SWITCH PUSH 250V 5A DPST JPW 2104B SW901 3404 000244 SWITCH TACT 15V 20mA 90 170gf 7 5x7mm SP SW902 3404 000244 SWITCH TACT 15V 20mA 90 170gf 7 5x7mm SP SW903 3404 000244 SWITCH TACT 15V 20mA 90 170gf 7 5x7mm SP SW904 3404 000244 SWITCH TACT 15V 20mA 90 170gf 7 5x7mm SP SW905 3404 000244 SWITCH TACT 15V 20m...

Page 44: ... BRIDGE D2SB60 STR KA2S0680 SWITCHING TRANS NORMAL STANDBY TO SOUND IC B 12 5V TO µ COM B 5V FBT 20 FSV 20A001 21 14 FCK 14A033 SOUND AMP 1CH x 3W TDA7056A OPTION SPEAKER 16R x 1EA SOUND AMP 4W x 2CH TDA7057AQ VERTICAL AMP TDA8356 RGB AMP TDA6107Q H OUT TR 20 KSD5072Y 14 KSD1771Y CRT FBT B 125V SWITCH MULTI REGULATOR KA7630 TO 1CHIP B 8V REGULATOR KA7812 SPEAKER 8R x 2EA BPF 4 5MHz NTSC SIF PAL NT...

Page 45: ...DZ208 129 116 DZ301 133 85 DZ302 54 81 DZ401 44 139 DZ501 34 221 DZ502 41 230 DZ503 48 238 DZ504 51 238 DZ602 81 214 DZ603 88 216 DZ701 35 120 DZ702 35 123 DZ703 25 125 DZ704 35 113 DZ705 35 118 DZ801 158 27 DZ802 163 222 DZ803 107 57 DZ804 159 31 DZ805 107 22 DZ806 162 214 DZ807 171 20 DZ901 128 201 DZ902 186 130 DZ903 240 169 DZ904 216 137 DZ905 206 106 DZ907 175 157 DZ908 232 82 DZ909 141 151 H...

Page 46: ... 4 5 6 7 8 SOUND L IN SOUND L OUT SOUND R OUT FRONT VIDEO IN GND 21 PIN VIDEO IN GND CRT PCB POWER CORD 1 2 3 4 5 CUT OFF G OUT R OUT B OUT GND 1 2 3 GND HEAT 180V 1 2 3 4 R OUT L OUT R OUT L OUT CN501B CN501B CN603 CN701 9 10 11 SOUND R IN GND FRONT AUDIO OUT 21 PIN AUDIO IN ...

Page 47: ...10 2 Samsung Electronics MEMO ...

Page 48: ...Schematic Diagrams 11 1 Samsung Electronics 11 Schematic Diagrams 11 1 TTX Micom ...

Page 49: ...Schematic Diagrams 11 2 Samsung Electronics 11 2 W O TTX Micom ...

Page 50: ...Schematic Diagrams 11 3 Samsung Electronics 11 3 ONE CHIP CHROMA Block ...

Page 51: ...Schematic Diagrams 11 4 Samsung Electronics 11 4 IF Sound EXT A V Block ...

Page 52: ...Schematic Diagrams 11 5 Samsung Electronics 11 5 Power Vertical Horizontal CRT ...

Page 53: ...Schematic Diagrams 11 6 Samsung Electronics 11 6 A V Front SUB ...