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Samsung CI21N112TZXXEU, Service Manual

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Samsung CI21N112TZXXEU Service Manual Download Page 18

Samsung Electronics

Troubleshooting

5-1

5. Troubleshooting 

5-1 No Video (Raster On, No Sound)

Yes

No

Open the IF Pin of Tuner

Check/Replace

TU01S

No

Measure the

Voltage of Each Pin 

 of TU01S

Check IC201S

Pins 2,3

See "No Video"

(Sound OK)

See "No Sound"

(Video OK)

Check/Replace

IC201S

Yes

No

Check/Replace

IC501, IC201S

Check IC201S

Pins 40,49,50

See "No Sound"

(Video OK)

Summary of Contents for CI21N112TZXXEU

Page 1: ...http www espec ws SAMSUNG chassis KS9A ...

Page 2: ...12ZZXXEF CI21N112TZXXEU COLOR TELEVISION RECEIVER CONTENTS Precautions Specifications and IC Data Disassembly and Reassembly Alignment and Adjustment Troubleshooting Exploded View and Parts List Electrical Parts List Block Diagram Wiring Diagram Schematic Diagrams 1 2 3 4 5 6 7 8 9 10 ...

Page 3: ...dle brackets 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 unit s 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 le...

Page 4: ...t appear 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 p...

Page 5: ...g and accessible 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 meg...

Page 6: ...trical 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 anti static 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 are ...

Page 7: ...uency 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 160 300V 50 60Hz VHF UHF Telescopic dipole antenna 75 ohm unbalanced type 8 ohm 7W 7W MAX SYSTEM PAL I UHF PAL I VHF UHF PAL B G SECAM B G PAL B G D K SECAM B G D K PAL B G ...

Page 8: ...108 LTV817B PHOTO COUPLER SPM802ER TTX English Croatian Romanian Hungarian Polish Czech Bulgarian Russian Portugal IC201S Philips Philips SPM802ERN W O TTX English Croatian Romanian Hungarian Polish Czech Bulgarian Russian Portugal VERTICAL OUTPUT LA7840 TDA7266S IC301 IC601 SOUND AMP 3W x 1CH or 3W x 2CH or 5W x 2CH IC801S KA5Q0765R POWER IC STR IC802 KA7632 CUSTOM REGULATOR 5V 8V 3 3V IC101 U446...

Page 9: ...64 SPM 802ER Pin 64 X24CO8P Pin 8 KS24C080 Pin 8 U4468B Pin 16 IC TRANSISTOR LA7840 TDA6107Q KA7632 TRANSISTOR TRANSISTOR 2SD1651 2SD1650 2SD2499 KSA614 B C E E B C KSC815 Y KSA539 Y BC548 KTC9014 IC UPC574J or KA33V SAW FILTER E C B KSR1012 KSR1010 KSR2010 KTD863 Y KSC2331 Y 1 1 1 G3956M K9260M Fig 2 1 Semiconductor Base Diagrams ...

Page 10: ... If the EEPROM or CRT is replaced set VA to 40 factory mode and set SC to 24 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 DISPLAY FACTORY 2 STAND BY DISPLAY MENU MUTE POWER ON 2 The SERVICE FACTORY message will be displayed The Service Mode has five com...

Page 11: ... STT Sub tint 0 7 7 AKB Black current stabilization 0 1 0 PDL PAL delay 0 15 1 NDL NTSC delay 0 15 10 PSR PAL sub color 0 23 15 NSR NTSC sub color 0 23 10 VOL Volume pre setting 0 63 10 LCO SECAM L Vision IF 0 1 0 TXP TTX Position 0 15 9 MVOL Melody initial volume adjustment 0 50 10 FMWS Narrow band sound PLL window selection 0 1 0 AGCS IF AGC speed 0 3 1 OMD Off set IF demodulator 0 63 26 SCL Sof...

Page 12: ...ice Mode various can be selected via the Option Table Example Option Table XX XX XX XX 1 LNA ON 2 SYSTEM CZ 3 AUDIO STEREO 4 JACK 5 ZOOM NOR ZOOM 16 9 6 AUTO POWER ON 7 SBL OFF 8 2nd SIF ON 9 HOTEL MODE OFF 10 BKS ON 11 HIGH DEVIA ON 12 HELP MENU ON 13 TIME ON 14 V GUARD OFF ＳＣＡＲＴ ...

Page 13: ...e that the power cord is disconnected 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...

Page 14: ...en VR on the FBT so that the voltage on the oscilloscope becomes 120 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 black and white signal 5 Fully demagnetize the receiver by applying an external degaussing coil 6 T...

Page 15: ... 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 DISPLAY FACTORY FACTORY 2 Input a Toshiba pattern b Low Light Adjustment 1 Set SBT to 3 5 0 5 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 area c High Light Adjustment 1 Set SCT to 55 ...

Page 16: ...and the blue vertical lines in the center area of the screen 5 Turn the both tabs at the same time keeping the angle constant and superimpose the red and blue horizontal line in the center of the screen 6 Adjust the two tab pairs of the 6 pole magnets to superimpose the red and blue line onto the green Changing the angle affects the vertical lines and rotating both magnets affects the horizontal l...

Page 17: ...he lion head circle becomes oval 3 Adjust with VSL Vertical Slope so that the bottom margin of the picture is 4 Fig 4 7 4 Adjust with VS Vertical shift so that the top margin of the picture is 4 Fig 4 8 5 Adjust with HS Horizontal Shift so that the lion head pattern and CRT centers are aligned Fig 4 9 6 Adjust HS using the width coil so that the left and right margins of the picture are 5 Alignmen...

Page 18: ... On No Sound Yes No Open the IF Pin of Tuner Check Replace TU01S No Measure the Voltage of Each Pin of TU01S Check IC201S Pins 2 3 See No Video Sound OK See No Sound Video OK Check Replace IC201S Yes No Check Replace IC501 IC201S Check IC201S Pins 40 49 50 See No Sound Video OK ...

Page 19: ...es Check IC802 Pin 8 8V Pin 9 9V Pin 10 5V Check Replace IC801S D801S D802S D803S D804S FP801S Check Replace IC802 KA7632 Check IC201S Pin 1 Stand by 0V Normal 3 3V Check Replace IC201S Check IC201S Pin 1 3 3V Check Replace IC201S µ com Check IC201S Pin 33 H out Check Replace IC201S Q401 Q402 Ｄ４０２ Ｄ４０３ ...

Page 20: ...No No Check IC201S Pin 40 CVBS Check Replace IC201S Check IC201S Pins 38 R214 R215 Check IC201S Pin 49 V GUARD Pin 50 Cut off Pin 51 53 R G B out Check Replace IC201S Check IC501 on the CRT PCB Check Replace IC501 Check Replace R421 R505 HEATER 6 3Vrms D503 CRT G1 pin CRT V999S ...

Page 21: ... V Front assembly Check IC201S Pin 44 Sound Out Check Replace IC201S Check IC601 Pin 3 13 B 10 12 5V Check Replace Q904 IC201S Check IC601 Check Replace IC601 Check IC601 Pins 6 0V Check Replace R814 R815 Yes Yes No Yes Yes 5 5 No TTX No See No Video Check IC201S Check Replace IC201S Yes ...

Page 22: ...R AUDIO AMP 7W 2CH FBT S W TRANS AC DC Converter SMPS CONT ROLER KA7632 14N 21F CRT VIDEO AMP TDA6107 A 125V A 13V To FBT B To Sound AMP B UOC UOC RGB V Drive H Drive Pre AMP VIF SAW S W B 8V B 5V A 3 3V TUNER Back JACK RCA In Out OPTION SIF S W SIF IC MSP Option OPTION 180V 16 5V IF A V IN A V OUT OPTION MONO ...

Page 23: ...SOUND L OUT SOUND L IN SOUND R IN FRONT AUDIO IN GND 21 PIN AUDIO IN GND CRT PCB POWER CORD 1 2 3 4 5 180V GND CUT OFF B OUT G OUT R OUT HEAT NC 1 2 3 GND HEAT 180V 1 2 3 4 L OUT R OUT L OUT R OUT CN501B CN501 CN603 CN701 9 10 11 SOUND R OUT GND FRONT VIDEO IN 21 PIN VIDEO IN 6 7 8 ...

Page 24: ...s 10 1 Samsung Electronics 10 Schematic Diagrams 10 1 ONECHIP MICOM Power Line TP01 TP02 TP04 TP05 TP07 TP08 TP10 TP11 TP13 TP14 TP03 TP06 TP09 TP12 TP03 TP05 TP04 TP06 TP12 TP13 TP09 TP08 TP10 TP11 TP02 TP07 TP14 TP01 ...

Page 25: ...Schematic Diagrams 10 2 Samsung Electronics 10 2 SOUND EXT A V SCART Power Line ...

Page 26: ...Schematic Diagrams 10 3 Samsung Electronics 10 3 SOUND EXT A V RCA Power Line ...

Page 27: ...Schematic Diagrams 10 4 Samsung Electronics 10 4 POWER CRT VERTICAL HORIZONTAL TP01 TP02 TP03 TP04 TP05 TP06 Power Line TP06 TP05 TP04 TP03 TP02 TP01 ...

Page 28: ...Schematic Diagrams 10 5 Samsung Electronics 10 5 SUB PCB MONO ...

Page 29: ...Schematic Diagrams 10 6 Samsung Electronics 10 6 SUB PCB STEREO ...

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