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Service Manual TV/VCR IN ONE BOARD CHASSIS : CN-140 NTSC-M SYSTEM MODEL : DVN-14F6N DVN-20F6N Caution : In this Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information,please refer to PPL(Parts Price List) in Service Information Center (http://svc.dwe.co.kr).
SPECIFICATIONS Format : VHS standard Video Horizontal Resolution : More than 220 lines Playback System : 2 rotary heads, helical scanning system Audio Frequency : SP : 100 Hz-10KHz Luminance : FM azimuth LP : 100Hz-7KHz recording SLP : 100Hz-5KHz Color Signal : Converted Signal-to-Noise Ratio : Video : better than 43 dB (SP)
• Safety Check after Servicing Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions. Afterwards, perform the following tests and confirm the specfied values in order to veri- fy compliance with safety satandards.
IMPORTANT SERVICE NOTES 1. X-RAY RADIATION PRECAUTION sensitivity in the following manner. Connect at 1500 ohm watt resistor, paralleled by a 0.15 1) Excessive high voltage can produce potentially haz- mfd, AC type capacitor, between a known good earth ardous X-RAY RADIATION to avoid such hazards, the ground (water pipe, conduit, etc.) and the exposed metalic high voltage must not be above the specified limit.
3) Connect an accurate high voltage meter to CRT anode. alignment tools. The reading should be as follows. 2. Before performing adjustments TV set must be on at least 15 minutes. DVN-14F6N 24KV~26KV DVN-20F6N 26KV~28KV If a correct reading connot be obtaines, check circuitry for malfunctioning components.
8. CONVERGENCE MAGNET ASSEMBLY 5) Remove the Rubber Wedges. 6) Rotate and spread the tabs of the purity magnet (see fig- POSITIONING ure 2) around the neck of the picture tube until the green Convergence magnet assembly and rubber wedges need belt is in the center of the screen.
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8-2. CONVERGENCE ADJUSTMENTS B. CIRCUMFERENCE CONVERGENCE ADJUSTMENT NOTE : This adjustment requires Rubber Wedge Kit. NOTE : Before attempting any convergence adjustments, 1) Loosen the clamping screw of deflection yoke to allow to the receiver should be operated for at least 15 min- yoke to tilt.
LEADLESS(CHIP) INSTRUCTION 1.LEADLESS(CHIP) COMPONENT REMOVAL INSTRUCTION • The following procedures are recommended for the replacement of the leadless components used in this unit. 1-1. Preparation for replacement 1-3. Installing the Leadless (chip) Component a. Soldering Iron 1) Presolder the contact points of the circuit board. Use a pencil-type soldering iron that uses less than 3o watts.
2.LEADLESS (CHIP) COMPONENT IDENTIFICATION 2-1. Check the followings before S. M. D Troubleshooting • Cracked Chipped component Body • Rejection of Solder from copper Pads or Component • Cracked Separated Solder Joints • Foreign Matter on Copper Pads • Peeling end Terminations Fractured Leads •...
2.BOTTOM VIEW Fig. 10- Tape Transport Mechanism Identification (Bottom View) 20. Capstan Motor 25. Record Safety Lever 21. F/L Rack 26. Loading Lever L 22. Connect Plate 27. Loading Lever R 23. Reel Belt 28. Drum Total Ass'y 24. Reel Gear Total Ass'y 29.
3.F/L MECANISM VIEW Fig. 11- Front Loading Mechanism Identification (Top view) 1. Top Plate Ass'y 7. Loading Shaft 2. F/L Bracket R 8. Loading Lever L 3. Prism Cap 9. Door opener 4. Release Lever 10. Safety Lever 5. Loading Lever R 11.
4. General removal view assembly. 3. Remove the cassette holder assembly (Fig. 13) Front Loading Mechanism Removal (Fig. 12) 4. Remove the prism cap and remove one (1) screw hold- NOTE : The front loading mechanism must be in the eject position to remove it.
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Fig. 16- Loading Lever Ass'y Disassembly NOTE : Reassemble the cassette loading mechanism using the reverse procedures. Confirm that the two (2) bosses on the left side of the cassette holder are inserted into the groove in the left side of the top plate. Insert the two (2) bosses on the right side into the F/L bracket R (Fig.
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L/C Bracket Assembly removal (Fig. 22) 1. Remove one (1) screw from the L/C bracket assem- and remove the L/C bracket assembly from the deck mechanism (Fig. 22) NOTE : When reassembling, refer to Fig. 23 for alignment instruc- tions. Replacement of Pinch Lever Total Assembly Removal (Fig.
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Fig. 23- L/C Bracket Assembly Alignment Fig. 25- Main Plate Removal Cam Gear, and F/L Rack Removal (fig. 22) 1. Remove the cam gear form the deck mechanism. 2. Remove the relay lever from the main base Tension Band Assembly Removal (Fig.
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FE Head Removal (fig. 31) Remove one (1) screw (1) and lift the FE head (2) from the main base. Fig. 27- Tension Band Assem- Fig. 28- Tension Band Assem- bly Removal (2) bly Alignment With Main Base Capstan Motor Removal (Fig.
Some disassembly is required to access the adjustment locations. Refer to the "Disassembly Selection" in this publication for disassembly instructions. Caution : Use an isolation transformer when servicing. 5. Mechanical Checks/Gear Alignment (fig. 1, 2, 3, 4, 5) When mechanical problems occur or when reassembling parts in this mechanism, be sure to confirm the following instruc- tions to confirm the following: 1.
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3. There are two (2) triangular marks on the mode sense switch. When installing the L/C bracket assembly on the main base, confirm that the two (2) triangular marks aligned with each other in the EJECT mode (Fig. 3) Fig. 3 - Mechanical checks/Mode Sense S/W Alignment 4.
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5. Confirm that the triangular mark "A" on the Loading Gear L Ass'y is aligned with the notch "B" in the Loading Gear R Ass'y in EJECT mode (Fig. 5) 6. Make sure that the teeth of the Loading Rack are aligned with the those of the Loading Gear R so that hole "C" of the Loading Rack aligns with the circulr mark "D"...
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6. Tension checks Back Tension Measurement /Adjustment (fig. 6, 7) 1. Confirm that the position of the tension pole is correctly positioned. If not, refer to the "Tension Pole Position Adjustment Procedures" 2. Play back a T-120 tape from the beginning for about 20 seconds (wait until tape transporting system comes to be sta- ble).
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Operating the VCR Without a Cassette Tape 1. Remove the cassette Loading Mechanism. 2. By hand revolve the worm counterclockwise 7-8 times until pole base loading process starts automatically. 3. Then PLAY mode appears. If you want ANOTHER mode, Press the desired button. 4.
MECHANICAL ADJUSTMENTS Tape Path Alignment Procedures The tape transporting system is precisely aligned at the factory and under the normal circumstances will not require adjust- ment. However, if noise appears in the playback picture, it can be considered that the tape damage occured or the tape path has been changed, readjustment of the tape path is necessary.
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THE SCHEMATIC DIAGRAM OF TAPE TRANSPORTING SYSTEM TENSION POLE ¨î T-GUIDE ROLLER(P S-GUIDE POST ¨ï A/C HEAD ¨é FE HEAD ¨ð T-GUIDE POST ¨ê S-GUIDE ROLLER(P ¨ñ CAPSTAN SHAFT ¨ë S-SLANT POLE ¨ò PINCH ROLLER ¨ì DRUM ¨ó VERTICAL POST ¨í...
1. DVN-14F6N/DVN-20F6N 1-1. FRONT OF TV/VCR FRONT DOOR SPEAKER (RIGHT) 1-2. SIDE OF TV/VCR...
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1-3. REAR OF TV/VCR (DVN-14F6N ONLY) VHF INPUT * Rear of TV/VCR's Shape of DVN-20F6N is similar to DVN-14F6N'S VHF Input connect VHF antenna to this terminal.
2. PANEL VIEW 2-1. FRONT PANEL The section below summarizes the buttons, controls, and terminals that you will use with your TV. Your TV/VCR's front Panel Below you will find short descriptions of the buttons and indicators on the front panel. These are used following functions. 1 VIDEO IN jack Use this jack to receive a video signal from another A/V component.
3. Remote controller (DVN-14F6N/20F6N) 1 POWER Use this button to turn your TV/VCR on or off. 2 TV/CATV Use the button to set up your TV/VCR to receive signals from an antenna (TV) or a cable system (CATV). 3 TV/LINE...
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13 MUTE Use to turn the TV/VCR's sound on and off. 14 RECALL Press this button to display the current time, the counter, channel number or other status items. POWER 15 Number buttons (0-9) MUTE RECALL Use these buttons to change channels or select menu items.
ELECTRICAL ADJUSTMENTS 1. SERVO 1-1) X-path and P Adjustment Item Mode Adjustment parts Check point Test equipments Test tape Input signal X-path PLAY CORN SCREW PY09 Oscilloscope DN-1 P2, P3 Location of Adjustment Parts Observation Waveform MAIN PCB Horizontal Axis : S/DIV Vertical Axis : CH1 : H/SW, CH2 : ENVELOPE BOARD PY09...
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1-2) PLAYBACK PHASE Adjustment Mode Adjustment parts Check point Test equipments Test tape Input signal Play RN90 RY05 Oscilloscope DN-1 Location of Adjustment Parts Observation Waveform MAIN PCB Horizontal Axis : 100µS/DIV Vertical Axis : CH1 : SW30, CH2:V.OUT PY09 PY05 BOARD RN90...
2. AUDIO 2-1) AUDIO CIRCUIT ADJUSTMENT METHOD Item Mode Adjustment parts Check point Test equipments Test tape Input signal Audio RU57 RC HEAD 10Ω Audio level meter Blank tape Record Bias Location of Adjustment Parts Observation Waveform MAIN PCB Horizontal Axis : Vertical Axis : PY09 PY05...
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2-2) Audio Azimuth Adjustment Item Mode Adjustment parts Check point Test equipments Test tape Input signal Audio Azimuth PLAY AC HEAD'S P602 Signal GEN. DN-2 7KHz Adjustment SCREW Osilloscope MONO Bar Location of Adjustment Parts Observation Waveform MAIN PCB Horizontal Axis : 0.1mS/DIV Vertical Axis : 0.1V/DIV P602 BOARD...
3. VIDEO 3-1) Y NOISE REDUCTION Mode Adjustment parts Check point Test equipments Test tape Input signal RY 34 PY05, PY09 Oscilloscope Multi Burst Signal gen. with 3.58 MHz Location of Adjustment Parts Observation Waveform Y/C PCB Horizontal Axis : 10µS/DIV Vertical Axis : 20 mV/DIV PY05 RY34...
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3-2) COLOR NOISE REDUCTION Mode Adjustment parts Check point Test equipments Test tape Input signal RY 91 PY09 Signal gen. Color Bar Oscilloscope Location of Adjustment Parts Observation Waveform Y/C PCB Horizontal Axis : 10µS/DIV Vertical Axis : 50 mV/DIV PY05 PY09 RY91...
SIGNAL FLOW 1. VIDEO & AUDIO 1-1. FROM RF TO COMPOSITE VIDEO When the TIMER IC (I701) selects a certain channel from antenna, CLOCK, DATA, and ENABLE of I701 signals are inputted to the TUNER. So, TUNER(U101) tunes up a certain channel frequency by means of PLL circuit operation and output IF (Intermediate Frequency) signal.
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SWITCHING TABLE OF I503 MODE PLAY TOGGLE (EE) VIDEO AUDIO AUDIO VIDEO (Top View) * The input signal is transmitted to putput port when switching port is at logically high state.
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2. Power circuit (Power supply circuit) 2-1. Abstract And Function It selects SMPS(SWITCHING MODE POWER SUPPLY) which is possible to put in from AC 108V~132V/60Hz with SANKEN Ic STR-S5707 and supply the stable voltage which each circuit needs. The voltage which electric resources circuit supplies is followed. NO.SUPPLY ELECTRIC SOURCE SUPPLY CIRCUIT...
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2) Function of Each Termiinal No. of Terminal Symbol Description Function Collector Terminal Collector of TRr(Power Transistor) Ground Terminal Ground(Emitter of PTr) Base Terminal Base of PTr SINK Sink Terminal Base Current (IS) Input Overcurrent Protection Terminal Overcurrent Sensing Signal Input Inhibit Terminal Off Time Synchronizing Latch Terminal...
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3. DEFLECTION CIRCUIT Vertical, Horizental drive pulses are out of M52335ASP(I501). This vertical drive pulses are connected to Vertical Drive IC TA8445K(I301) and drive vertical deflection coils. This horizental deflection drive pulses by driving horizental output circuits drive horizental deflection coils and supply 26.5v, 180v, high voltage 25kV, focus voltage and screen voltage by driving FBT.
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6. SERVO/SYSCON CIRCUIT OPERATION 1) summary • When power supply is supplied to TV/VCR, Servo-Syscon 1 Chip IC confirms the driving condition of DECK by checking CAM SW from DECK. And it gets capstan Motor worked and is operated as initial Mode. This is ready for receiving the serial data from timer IC after proper operating according to the driving condition of Deck and the existence of tape or not.
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2. REC mode VIDEO IN VIDEO OUT IY03 LA7411 REC EQ IY01 PRE-AMP LA7423A Y/C PROCESS IC 7.1M LPF HA SW REC "H" IY02 LC89960 IH CCD IC • Signal is put in to #31 of IY01(LA7423A), and it is seperated into Luminance and Chroma within IC.FM modulated luminance signal is put in to #34 and low-frequency transformed color signal is put in to #14.
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IMPORTANT IC'S OPERATION IY03 (LA7411) 1. Case Outline : DIP-24S (300mil) Plastic Package 2. Application : VHS format VTR Record and Playback Head Amplifiers 3. Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum supply voltage VCC max Allowable power dissipation Pd max 6.5°C...
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Pin-function Type DC voltage(V) Input/Output configuration Remarks PB-L-IN PB-H-IN REC ON PB-L-SW REC ON PB-H-SW ON resistance 4 to 6Ω PB ON 7. Pin Operation VIDEO PREAMP IC LA7411 MODE STOP PLAY REW/FWD REV/FF PAUSE STILL .2.6...
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IY02 (LC89960) 1. Overview The SANYO LC89960 is a 1H delay line for NTSC television systems. Only an external low-pass filter is required to implement a 1H delay line. 2. Features • Single 5V power supply. • 1H delay signal can be obtained with low-pass filter and 3.58MHz clock input. •...
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IY01 (LA7423A) 1. Case Outline : DIP-36S(400mil) Plastic Package 2. Application : VHS VTR Video signal Processor (Y/C single-chip) 3. Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum supply voltage VCC max Allowable power dissipation Pd max 65°C 1070 Operating temperature...
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Pin-function Type voltage(V) Signal waveform Input/Output configuration Remarks REC = 2.5V NC-CTL under 1.5V N.C OFF 2.0~3.0V N.C CTL PB = 2.5V over 3.8V Y/CMix OFF (N.C. Center) REC C-OUR REC =2.4V Y-FM PB-YC-IN PB = 3.2V +Low Chroma AGC-TC 1 REC = 2.4V BALANCER PB = 2.3V...
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Pin-function Type voltage(V) Signal waveform Input/Output configuration Remarks REC = 2.8V SLD-FILT PB = 2.8V REC =2.8V AFC/APC FILT PB = 2.8V REC = 1.9V XO mode when over 3.5V C-OUT PB = 1.9V ANR ON when over 3.5V Color = 1.9V KILL-FILT Killer = 3.1V REC = 1.7V...
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Pin-function Type voltage(V) Signal waveform Input/Output configuration Remarks REG = 4.2 4.2V SYNC OUT 1.75V when CNR mode VCC-1 VIDEO OUT QV. QH INS. CHARA INS ROT-PLS...
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IU01 (BA7790LS) 1. FUNCTION (1) Circuit essential for a standard sound signal processing system as a PB AMP, REC AMP, ALC circuit, EQ selecting switch and high voltage head switch have been intergrated onto a single 1 chip. (2) Built-in LINE/TUNER INPUT selecting switch. (3) Built-in summary 3 mode EQ switch and it can be obtained EQ carateristics of each mode.
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5. Terminal Function Table Terminal Terminal No. Description Function Termanal Form Voltage HEAD EQ Selecting swiitch of condenser 0.0V 220kΩ/27Ω(ON) for head resonance PB IN PB AMP input/PB side head switch 3.4V REC : 120kΩ REC : 11Ω(ON) REC HSW REC side high voltage head switch 0.0V REC : 11Ω(ON)
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MODE STOP PLAY REW/FWD REV/FF PAUSE STILL...
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PIN NAME DISCRIPTION S/CLK Serial Clock S/OUT Serial OUT, Contact with TIMER IC Serial IN S/IN Serial IN, Contact with TIMER IN Serial OUT SYNC (L) NOT USED VCR/ON(L) NOT USED LINE/TV NOT USED NOT USED C/SYNC Composite Sync SLOW STEP Adjusting Vth of CTL/P, Set concerned area on 'L' when SLOW mode C.
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PIN NAME DISCRIPTION AUDIO SLP(H) Set 'H' When SLP mode. D/PWM Drum motor control PWM output *period of PWM : 23.4KHz (6MHz/256) C/PWM Capstan motor PWM output * period of PWM : 23.4KHz (6MHz/256) GND(D) Digital GND NOT USED CST IN(L) NOT USED REC(L) Set 'L' when recording...
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PIN NAME DISCRIPTION CAM A CAM Detection input port CAM B POWER MODE CAM C 2.9 ~ 3.7 EJECT 4.35(H) CAM D 3.7 ~ 4.5 STAND-BY(INITIAL) 4.35(L) 2.2 ~ 2.9 REV 5.30(L) 2.9 ~ 3.7 STOP 2.65(L) 0.0 ~ 2.2 PLAY, QUE 2.65(H) 2.2 ~ 2.9 FF/REW 2.10(L)
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I701(Timer : M37267M6 - 101SP) 1. Pin Layout M37267M6 - 101SP HSYNC P52/R R OUT HSYNC INPUT G OUT VSYNC INPUT VSYNC P53/G B OUT AFT INPUT P40/MXR/AD4 P54/B BLINKING OUTPUT N. C. P41/INT2/MXG P55/OUT1 CONTRAST PWM OUTPUT SYNC DETECT INPUT P42/TIM2/MXB P04/PWMO BRIGHT PWM OUTPUT...
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2. Pin discription PIN NO NAME DISCRIPTION ACTIVE HSYNC HSYNC HSYNC INPUT TERMINAL VSYNC VSYNC V SYNC INPUT TERMINAL /MXR/AD4 AFT SIGNAL INPUT TERMINAL /INT2/MXG N. C. NOT USED – /TIM2/MXB SYNC DETECT INPUT TERMINAL HIGH /TIM3/MXOUT N. C. NOT USED –...
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PIN NO NAME DISCRIPTION ACTIVE X IN MAIN CLOCK (4.19MHz) XOUT X OUT MAIN CLOCK (4.19MHz) MAIN CPU GND TERMINAL – MAIN CPU POWER TERMINAL (+5 CONNECT) – /OSC2/XCIN OSC2 SUB CLOCK (32.768KHz) /OSC2/XCOUT OSC1 SUB CLOCK (32.768KHz) RESET CPU RESET INPUT TERMINAL RESET N.
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PIN NO NAME DISCRIPTION ACTIVE /PWM1 BRIGHT BRIGHT PWM OUTPUT TERMINAL /PWM0 CONTRAST CONTRAST PWM OUTPUT TERMINAL /OUT1 BLANK BLINKING OUTPUT TERMINAL B OUTPUT TERMINAL G OUTPUT TERMINAL R OUTPUT TERMINAL...
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I501 (CHROMA IC : M52335SP - 600) 1. Pin Layout 1501 M52335SP RF AGC OUT EXT AUDIO IN VIDEO OUT SOUND DET COIL AFT OUT SOUND DET OUT AFT DEFEAT AF OUT SIF IN IF AGC FILTER VIDEO VCO COIL RF AGC DELAY ADJ VIDEO VCO COIL GND-1(VIF, SIF)
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2. DESCRIPTION OF PIN Voltage and Name Peripheral circuit of pins Description of function wave Information The Input impedance is 18kΩ. Add a blas to out- 2.4k side as shown right for use. 4.7k 2.4k AUDIO 3.25V 3.9k 4.5V The EM detector is a quadrature detector and externally connects a tank coll or discrimina-...
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DESCRIPTION OF PIN (cont). Voltage and Name Peripheral circuit of pins Description of function wave Information Dynamic AGC circuit is used to improve AGC response characteris- tics. Set a filter constant to avoid a sag around IF AGC 4.4 to 1.5V 70dBµ.
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DESCRIPTION OF PIN (cont). Voltage and Name Peripheral circuit of pins Description of function wave Information Power supply pin for horizontal and vertical H. Vcc systems. it'scurrent is about 34mA. Horizontal AFC filter pin. Action against VCR skews can be taken by increasing an external AFC FILTER 6.25V...
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DESCRIPTION OF PIN (cont). Voltage and Name Peripheral circuit of pins Description of function wave Information Voltage goes up if a sync signal is entered and horizontal AFC is locked; otherwise, the 8V(Synchronous) voltage goes down. COINCIDEN- therefore, the pin can be CE OUT 0V(Asynchronous) also used as a MUTE...
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DESCRIPTION OF PIN (cont). Voltage and Name Peripheral circuit of pins Description of function wave Information Video output pin. when a flybaxk pulse is entered for blanking from outside, a blanking pulse is entered internal- Y. OUT ly and a chroma symbol is also blanked.
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DESCRIPTION OF PIN (cont). Voltage and Name Peripheral circuit of pins Description of function wave Information Applying voltage of 2.5V or more causes blanking FAST BLK IN 2.5V Cap challenge is changed by R. As R is decreased, the cap chal- tenge becomes narrow- er, but phase, jitters are reduced.
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DESCRIPTION OF PIN (cont). Voltage and Name Peripheral circuit of pins Description of function wave Information Pin holding the most dark part of a video sig- nal. As R is increased, the black peak is held; contrarily, the peak gets BLACK About 3.2V 1.5k 1.5k...
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DESCRIPTION OF PIN (cont). Voltage and Name Peripheral circuit of pins Description of function wave Information Used to connect a hold capacitor. 3.9k PEDESTAL About 2.2V 1.07k CLAMP 1.4k 1.2k 1.5k Sharpness control pin. By increasing voltage, the pin is set to soft side. VIDEO TONE 4.5V 6.2k...
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DESCRIPTION OF PIN (cont). Voltage and Name Peripheral circuit of pins Description of function wave Information Output at 1.5Vp-p. Y SW OUT 2.5V 1.125k Sync separation of emit- ter input type. Vertical sync separation is done inside the 1C. SYNC IN. 6.6V 7.35V Make an entry at 1V p-p.
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DESCRIPTION OF PIN (cont). Voltage and Name Peripheral circuit of pins Description of function wave Information Volume control pin. SIF IN/ATT 4.5V 29.3p 2.4k 4.5V Applying voltage 0f 2.5v or more defeats AFT. DEFEAT 23.3k Current output type. As load resistor R is increased, detector sen- sitlvity becomes higher but offlot becomed larg-...
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DESCRIPTION OF PIN (cont). Voltage and Name Peripheral circuit of pins Description of function wave Information current output type. Max. 0.4mA. 0.4mA RF AGC OUT 0.4mA...
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TROUBLESHOOTING ACCORDING TO CAUSE AND SYMPTOM 1. POWER SUPPLY UNIT 2. VERTICAL, HORIZONTAL UNIT 3. SERVO/SYSCON UNIT 4. VIDEO UNIT 5. AUDIO UNIT – Before Troubleshooting, Read followings. • Picture is not appeared when occurs following items. 1) When power supply is not supplied 2) When horizontal output TR is dead 3) When operation of over current protecting circuit.
1. Power supply unit TV is not turned ON Is AC power Supply Input Check F801 & Power code Are diodes operated? Check L801, D802, D803, D802, D803, D804, D805 D804, D805 Is Voltage output from both Check R803, C806 terminals of C806 ? Are D811, D812, D813, D814 Check D811, D812, D813,...
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– check 125V unit Does over current protecting Check R832, R809 circuit operate ? Are voltages on base & collec- Check T401 and Q402 tor terminal of Q402 normal ? Change Is 26.5V of FBT output R301 and Check R301 and D301 normal? D301 Check I301...
2. VERTICAL, HORIZONTAL UNIT. Horizontal Line is only appeared on the screen. Are 25V and 9V supplied Check power circuit at pin 7 and pin 1 of I301 ? Is waveform at pin 2 of I301 Check I701 pin 2 normal ? check a waveform at pin Check C312...
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Horizontal screen is abnormal Is base waveform of Is collector waveform of Q402 normal ? Q401 normal ? Check T401 Check T402 and L401 pin 10 Check the capacity of C412 and soldering condition. Check R406, C413, L402, C409, D404, R407.
3. SERVO/SYSCON UNIT Playback picture is not good. Noise appears although Adjust tracking adjusting tracking Check and Noise shakes up and down Noise appears although readjust the on the screen. change cassette tape. path of Deck Check PY 03 Is CTL pulse applied to and CTL Amp pin 7 of IN03 ? circuit IN03...
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Playback picture is not good. Noise appears over The entire screen scrolls up and down the entire screen Check P.G Adjustment Check D. PG Are SW pulse input IN01 pin Is SW pulse suppiled applied to 18 and connector from pin 23 of IN01 PRE-AMP circuit ? (PY04) Check patten...
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Durm Motor dose not rotate. Is Motor 12V supplied Is I805 operated ? Check I805 to PY04 pin 1 Check IN05 Check PY04 and Is D. PWM applied RCN47, RN44, CN21, pin 30 of IN01 ? CCN44 Check connector PY04 and DRUM Motor Capatan Motor does not rotate.
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Durm Motor and Capstan M/T rotate at irregular speed (In REC mode) Is C. sync applied to Check C. Sync (PIN26) of pin 12 of IN01 VIDEO IC (IY01) and patten Check IN01 The instrunment goes into the emergency mode. Though AC power is connected, STAND-BY LED blinks.
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Cassette loading inoperative. Is Motor 12V Check I805 IN05 pin supplied ? Check connector PAN04 pin Are there changes in the cam and CAM SW and data when the cassette is in ? DECK Mechanism Is 6V applied to pin of IN05 Is 5V supplied at pin Check IN01...
4. VIDEO UNIT EE MODE Picture NG Is video signal input into pin 42 Check PIF circuit and (Video jack) and 45 of I501 LINE IN JACK Is 5V supplied at pin 10 Check ON/OFF and 9V supplied at pin 12 of I501 9V circuit.
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Power supply is normal No video Check Check clock, enable and Check pin 35, 36, 37 oscillation data of tuner of I701 at pin 24 of I701 Is IF signal from tuner normal ? Check Tuner Refer from EE mode no video trouble shooting flow chart...
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PB video signal missing Is envelope output from Check power Is 5V supplied at IY03 pin 7 ? circuit IY03 pin 15 ? Check IN01 Is SW pulse input into pin 23 IY03 pin 2 ? Clean head or change head Check Power Check IY01 pin Is signal output from...
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Self Record playback video signal NG Check EP mode Is REC(H) output from Check QY06 and IN01 pin36 PAY01 pin3? Is REC color signal Is signal input into IY01 Check IY01 output from pin 31 ? IY01 pin 14 ? Check IY01 Is luminance signal output from IY01 pin 2 ?
5. AUDIO UNIT. AUDIO SOUND IS NOT OUTPUT AT EE(STOP) MODE Check Z103, CC115, CC116, L104 Check if there is output Check if there is input at at pin 4 of I501 pin 48 of I501 Check Q101 Check if there is input at Base pin 2 of I501 TV : L...
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No sound in the playback mode Is the output at pin 22 Is 11V applied to pin Check power of IU01 ? 7 of IU01 ? circuit Is the signal applied to pin Is Q101 Is 5V applied to pin Check QN07 1 of I501 base 'H'?
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C. This flow chart must be used only in Record Mode. Audio sound is not output when self Record-Playback Check I503 pin 12 RF/AV Check I701 RF(L)/AV(H) Check I503 pin 11 Check A/V Jack Check I503 pin 6 RF(H)/AV(L) Check I701 Check I501 Check I503 pin 8...
ELECTRICAL PARTS LIST 1. STANDARD PART NUMBER CODING 1-1. RESISTOR CODING 1. Fixed Resistor Coding Type of Resistor Type of Resistor Distance Value Tolerance Code Wattage Composition Resistor Code Distance Symbol tolerance Example Carbon Resistor 1/6w 2.5mm ±1% 0.47Ω Fusible Resistor 1/8W 5.0mm ±2%...
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1-2. CAPACITOR CODING 1. Normal Distance Distance Value (Same as Fixed (Same as Fixed Type (Same As Resistor) Resistor) Code Type Code Voltage Fixed Resistor) 6.3V Aluminum Barrier Layer Ceramic Shape Electrolytic Line Across Characteristic Mylar Styrol Metalized Polyester Mica 100V 125V Tantal...
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CAUTION : In this Service Manual, some parts can be changed for improving their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List)in Service information Center(http://svc.dwe.co.kr) 2.PARTS LIST LOC.
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LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK R911 RD-AZ151J- R CARBON FILM 1/6 150 OHM J R912 RD-AZ151J- R CARBON FILM 1/6 150 OHM J R913 RD-AZ151J- R CARBON FILM 1/6 150 OHM J R914 RD-AZ821J- R CARBON FILM 1/6 820 OHM J R915 RD-AZ821J- R CARBON FILM...
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LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK C816 CEXF2C101V C ELECTRO 160V RSS 100MF (16X25) TP C818 CCZF1E103Z C CERA 25V F 0.01MF Z (AXIAL) C821 CEXF1H220V C ELECTRO 50V RSS 22MF (5X11) TP D301 DBYV95C—- DIODE BYV95C (TAPPING) D302 D1N4003—- DIODE 1N4003 (TAPPING) D401 DBYV95C—-...
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LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK R316 RD-2Z102J- R CARBON FILM 1/2 1K OHM J R402 RF01Y369J- R FUSIBLE 1W 3.6 OHM J RF01Y479J- R FUSIBLE 1W 4.7 OHM J DVN-20F6N R403 RF01Y479J- R FUSIBLE 1W 4.7 OHM J R405 RS02Y560JS R M-OXIDE FILM 2W 56 OHM J SMALL R406...
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LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK CCY26 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 CCY27 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF Z 2012 CCY28 HCQK390JCA C CHIP CERA 50V CH 39PF J 2012 CCY29 HCQK680JCA C CHIP CERA 50V CH 68PF J 2012 CCY30 HCBK103KCA...
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LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK CY19 CEXF1E101V C ELECTRO 25V RSS 100MF (6.3X11) TP CY23 CEXF1E101V C ELECTRO 25V RSS 100MF (6.3X11) TP CY25 CEXF1E470V C ELECTRO 25V RSS 47MF (5X11) TP CY31 CEXF1C101A C ELECTRO 16V RSM 100MF (6.3X7) TP CY37 CEXF1H100V C ELECTRO...