Television Video Cassette Recorder Chassis : V15A Model: TT20A54X/XAX TT20A54X/RCL TT20A54X/GSU TT14A54X/XAX Television Video Cassette Recorder CONTENTS Precautions Specifications Alignment and Adjustment (VCR) Alignment and Adjustment (TV) Timing Chart Troubleshooting Exploded View and Parts List Electric Parts List Block Diagram...
Heed the high voltage limits. These include not exceed 0.5 milliamp. Reverse the power- the XÐray Protection Specifications Label, and plug prongs in the AC outlet and repeat the the Product Safety and X-ray Warning Note on test. the service data schematic. Samsung Electronics...
14. Components, parts and wiring that 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 overheating, and correct any potential hazards. Samsung Electronics...
Make sure that the portion around 8. Always connect a test instrumentÕs ground the serviced part has not been damaged. lead to the instrument chassis ground before connecting the positive lead; always remove the instrumentÕs ground lead last. Samsung Electronics...
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4. Do not use freon-propelled chemicals. These unpackaged replacement ESDs. Motions such can generate electrical charges that damage as brushing clothes together, or lifting a foot ESDs. from a carpeted floor can generate enough static electricity to damage an ESD. Samsung Electronics...
Power Consumption 13 (14) Inch : Approx. 65 watts when on 19 (20) Inch : Approx. 80 watts when on Operating Temperature 41°F - 104°F (5°C - 40°C) Operating Humidity 10%-75% Equipment specifications are subject to change without notice. Samsung Electronics...
Fig. 3-1 Parts Locations of transport system FE HEAD CYLINDER ASS'Y PINCH ROLLER GUIDE ROLLER "S" GUIDE ROLLER "T" POST TENSION #8 GUIDE POST #9 GUIDE POST MAIN BASE ACE HEAD CAPSTAN SHAFT #3 GUIDE POST Fig. 3-2 Vertical section of tape transport system Samsung Electronics...
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Test Tape : Color bar (1 KHz) LOCKING Lion pattern(7 KHz) Fig. 3-4 Location of A/C Head Adjustment Screw AUDIO HEAD VIDEO HEAD 0 ~ 0 .25 mm CONTROL HEAD Fig. 3-5 A/C Head Height Adjustment Fig. 3-3 Samsung Electronics...
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1. Load alignment tape (Mono Scope) and play back a 7KHz signal. 2. Connect Ch1 scope probe to JM119(A-OUT). 3. Adjust A/C head azimuth adjustment screw B for maximum audio output level (see Fig. 3-4). Fig. 3-7 Test Point Position (Main PCB : Parts) Samsung Electronics...
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= Minimum output of the video RF envelope at the center point d = Maximum output of the video RF envelope at the exit side Fig. 3-9 Control Pulse Adjustment a b c d c,b,d/a Fig. 3-11 Envelope Waveform Adjustment Samsung Electronics...
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10. After completing the adjustments, tighten the (Fig. 3-13). set screw. IDEAL ENVELOPE S HEIGHT S HEIGHT T HEIGHT T HEIGHT TOO HIGH TOO LOW TOO HIGH TOO LOW GUIDE ROLLER T GUIDE ROLLER S Fig. 3-14 S, T-Guide Roller Height Adjustment Samsung Electronics...
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2. If excessive tape wrinkle is observed during the above modes, do the following adjustments : If tape wrinkle occurs at S, T-guide rollers, do a linearity adjustment. If tape wrinkle exists at the tape guide flange, do an A/C head assembly adjustment. Samsung Electronics...
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AssÕy). Note : If the spec. does not meet the followings specifications, replace the holder clutch assÕy and then recheck. MODE TORQUE g/cm GAUGE NTSC 82.5 ± 27.5 Cassette Torquemeter 79 ± 27 145 ± 30 Cassette Torquemeter Samsung Electronics...
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Fig. 3-19 Tension Pole and Back Tension Adjustment Note : 1. Mark on Main Base is located in about 1.3mm from inside of bending line. 2. Be careful not to deform the region of adjusting on Main Base up and down at adjusting. Samsung Electronics...
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2. Connect the oscilloscope CH1 to EYM03 (HÕD) and CH2 to EYM11 (V.OUT) 3. Set the oscilloscope sync to CH1, and adjust VRM601 for 6.5H ± 0.5H waveform as shown in the figure. SW30Hz SWITCHING POINT PULSE VIDEO 6.5H 0.5H OUTPUT Fig. 3-21 Fig. 3-20 Samsung Electronics...
26 and the V-Sync of pin 27 Check/Replace IC901 Normal Check Abnormal IC901 Pin 17 (High when power On) Check/Replace IC902 Normal Abnormal Check the voltage of Q804 coil pin Check/Replace Q804 Normal Check the voltage of tuner Samsung Electronics...
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IC200 Pin 29 of Q804 Normal Abnormal Check Abnormal Check/Replace Check the voltage the voltages of CRT Drive F/S circuit of Tuner (180V, 9V) Normal Abnormal Normal Check the signal Check/Replace Check the voltage input to CRT cathode of Tuner Samsung Electronics...
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Abnormal the signal input Check Q902 to IC601 Pin 3 Normal Normal Check/Replace IC601 Abnormal Check Check 13.5V the V input to IC601 Normal Abnormal Normal Check the signal Check/Replace Check/Replace output from IC601 Pin 2 Speaker IC601 Samsung Electronics...
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Normal Check/Replace DY or FBT 6-5 No Color Check the Abnormal Abnormal signal input to IC201 Check IC201 Check Q202, IC201. Pin 45 Normal Abnormal Check Check C213, X201 IC201 Pin 12 Normal Check IC201 Samsung Electronics...
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Abnormal Check the A.EE/PB/REC Abnormal Line and D.REC Line (ICM601 78, 94 Pin Check) Abnormal Check the PC 5V Check the PC 5V line of ICM301 Pin 75 Normal Abnormal Check AC head Replace ICM301 line and CNM501 Samsung Electronics...
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QM501, base voltage is high Abnormal Replace QM501 Check the D.REC Check if Abnormal Normal terminal line the PC 5V is applied to (ICM601 Pin 78) FLM501 Pin 2 Normal Check the PC 5V line Replace FLM501 Samsung Electronics...
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Check the rotation doesn't Rotate" of capstan Normal Abnormal Check PTM602, PTM601, Check ICM601 T-Reel takeup sensor Pin 84, 85 Normal Check Stop Mode Check the ICM601 Pin 4, 5, 6 loading motor ( PROG, SW) Normal Replace ICM601 Samsung Electronics...
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6-10 ”FF” Doesn’t Operate Insert a tape and operate "FF" Check Stop Refer to "Deck doesn't ICM601 Pin 4, 5, 6 operate during Playback (PROG.SW) Normal Check Abnormal Refer to the rotation of "Capstan doesn't rotate" capstan Normal Check the Deck. Samsung Electronics...
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Check Abnormal Check Abnormal the control pulse Readjust the height if the noise bar is fixed of ICM601 Pin 37 of A/C head Normal Normal Check the B + Check/Replace ICM601 Capstan Motor Normal Check the capstan motor Samsung Electronics...
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Replace ICM601 Check Abnormal Abnormal the control pulse Readjust the height Check for noise bar of ICM601 Pin 37 of A/C head Normal Normal Check the B + Check/Replace ICM601 Capstan Motor Normal Check the capstan motor 6-10 Samsung Electronics...
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ICM601 Pin 18 : LOW Normal Check the B + terminal Abnormal Check the voltage of of loading motor ICM603 (PC 9V) Normal Abnormal Check of ICM603 Replace ICM603 Normal Check ICM601 Pin 4, 5, 6 Normal Check/Replace the loading motor Samsung Electronics 6-11...
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Check Abnormal Abnormal Check CNM201 the capstan PWM CTL Replace ICM601 Pin 4 (2.5V) at ICM601 Pin 25 Normal Check Abnormal Check the AL (5V) the voltage of CNM201 Pin 8 (5V) Normal Check the capstan motor 6-12 Samsung Electronics...
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Check the voltage the rotation speed the PWM at ICM601 of ICM601 Pin 22, 15, 41 of cylinder Pin 26 (Slow) Normal Normal Check Abnormal Replace XTM601 Check XTM601 (10MHz) XTM601 (10Mhz) Normal Check the cylinder motor Samsung Electronics 6-13...
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Replace ICM301 Check Abnormal Check the output of video the video signal at signal at CM305 ICM301 PIn 25 Normal Check Abnormal the video output Replace ICM301 signal at ICM301 Pin 35 Normal Check IC201 neighbor circuits 6-14 Samsung Electronics...
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Check Abnormal Abnormal Check the high voltage of ICM301 Pin 66 has the the high voltage of ICM301 ICM601 Pin 78 (D-REC) FM video signal Pin 16 (High) Normal Normal Check the video Replace ICM301 head (DRUM) Samsung Electronics 6-15...
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ICM301 Pin 16 (Low) ENVE Signal Normal Normal DRUM Check Check the Abnormal Check Pin 14 (Rotary) ICM301 Pin 72 has the color signal Normal Check Abnormal XTM301 ICM301-62 OSC : Replace 3.57MHz 30Hz Normal Replace ICM301 6-16 Samsung Electronics...
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ICM301- 62 OSC the ICM301 Pin 72 has Replace XTM301 (3.5795MHz 30Hz) the color signal Normal Normal Replace ICM301 Check Abnormal Check connecting pattern the color signal of and Pin 14 (Rorary SW) ICM301 Pin 66 Normal Replace ICM301 Samsung Electronics 6-17...
9. Block Diagram SF101 SPEAKER C BUS CONTROL TUNER IF-SIGNAL SOUND AMP MICOM IC601 PROM CRT-DRIVE Q401 H-OUT I-CHIP RF AUDIO EXT AUDIO AUDIO M/DECK EXT VIDIO RF/LINE VIDEO S/W IC RF VIDEO VERTICAL KA2131 SWITCHING SPS CONTROL TRANS Samsung Electronics...
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