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Daewoo DV- K584N-SJ Technical Manual
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Daewoo DV- K584N-SJ Technical Manual

Daewoo DV- K584N-SJ Technical Manual

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Technical Service Guide
MONO TECHNICAL MANUAL
DV- K584N-SJ
K584N-JJ
K584N-SG
K484N-SJ
K484N-JJ
K484N-SG
K384N-SJ
K284N-SJ
K584NY-SJ/M
K584NZ-SJ/M
K584NZ-SG/M
DV- K504N-SJ
K504NY-SG/X
K304N-SJ

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Summary of Contents for Daewoo DV- K584N-SJ

  • Page 1 Technical Service Guide MONO TECHNICAL MANUAL DV- K584N-SJ K584N-JJ K584N-SG K484N-SJ K484N-JJ K484N-SG K384N-SJ K284N-SJ K584NY-SJ/M K584NZ-SJ/M K584NZ-SG/M DV- K504N-SJ K504NY-SG/X K304N-SJ...

  • Page 2: Specifications

    SPECIFICATIONS Video Signal: EIA standard; NTSC color Power Input: 110~250 Volts AC 50/60Hz¡ Antenna: 75 ohm input impedance 120 Volts AC 60Hz¡¡ Video Signal Level: 1Vp-p (140 IRE standard) Power Consumption: 17 Watts (2-head and 4-head) Audio Input Impedance: 47k ohms Operating Temperature: 5 degree C to 40 degree C Audio Output...
  • Page 3 TEST EQUIPMENT REQUIREMENTS AC Millivolt Meter NTSC Video Signal Generator–Must provide 1V p-p negative Sensitivity: 1.0mVAC–400VAC sync video across a 75 ohm load and produce standard NTSC 75% saturated color bars with a 100% white window. Dual-Trace Triggered Oscilloscope–with Lo–Cap (X10) and Direct Probes.
  • Page 4 EXTENSION CABLE CONNECTION A/C HEAD L/C MOTOR TO CAPSTAN MOTOR (CABLE2) TO DRUM MOTOR (CABLE1) (CABLE3) P201 P502 P601 P501 MAIN PCB...
  • Page 5 NOTE: PLACING THE UNIT IN THE SERVICE MODE Service option For this chassis, the sensors (start/end/reel) are located on the MAIN circuit board, not in the DECK assembly. There is an important service option that has to be followed to repair the MAIN circuit board with the DECK assembly connected. To imitate the function of the sensors, insert the SVC Mode Diode (D707) on the MAIN circuit board as shown below.
  • Page 6 LEADLESS (CHIP) COMPONENT REMOVAL INSTRUCTION • The following procedures are recommended for the replacement of the leadless components used in this unit. 1. Preparation for replacement 2. Removing the leadless component (Resistors, Capacitors) Grasp the leadless component body with tweezers and alter- a.
  • Page 7 3. Installing the Leadless (chip) Component 4. Removing of Flate ICs (Recommendable manner) 1) Presolder the contact points of the circuit board. 1) For removing solder chips from IC's pins, use a solder remover or a wiry solder absorber. 2) Heat the IC's tips evenly by moving the chip IC replacing tool around them, and detach the IC's leads with a tool in the way of using a lever.
  • Page 8 LEADLESS (CHIP) COMPONENT IDENTIFICATION 1. Check the followings before S.M.D Troubleshooting • Cracked or Chipped Component Body • Rejection of Solder from Copper Pads or Component • Cracked or Separated Solder Joints • Foreign Matter on Copper Pads • Peeling end Terminations or Fractured Leads •...
  • Page 9 ABBREVIATIONS A or AUD : Audio : Dropout Compensator A.E. : Audio Erase : Drain and Source : Alternating current : Decibel : Automatic Color Control : Automatic Frequency Control ENVE : Envelope : Automatic Fine Tuning : Automatic Gain Control : Generator : Automatic Level Control : Ground...
  • Page 10 : Picture : Test Jump : Picture Intermediate Frequency : Test Pin : Phase Locked Loop : Transistor : Phase Shift TRANS : Transformer : Pulse Width Modulator : Tracking : Power : Tuner : Transistor : Ultra High Frequency : Quasi Vertical : Volt, Vertical : Resistor, Right...
  • Page 11 OPERATION CONTROLS AND FUNCTION FRONT VIEW NOTE: Model-K584N-SJ, K584N-JJ, K584N-JG, K484N-SJ, K484N-JJ, K584N-JG, K384N-SJ, K284N-SJ, K584NY-SJ/M, K584NZ-SJ/M, K584NZ-SG/M ! @ # $ ^ & * STOP/EJECT POWER PLAY NOTE: Model-K504N-SJ, K304N-SJ @ # $ VISS VIDEO INDEX SEARCH SYSTEM & *...
  • Page 12 ! POWER Button & PLAY/PAUSE Button Press this button to turn the VCR on or off. When the VCR is Press this button to play the recorded material. turned off, the timer recording is automatically turned on if it Playback indicator appears in the multifunction display. has been programmed.
  • Page 13 REAR VIEW NOTE: 2/4Head mono model ANT IN VIDEO AUDIO RF OUT & ! CH3 or CH4 Switch % Audio Output Connector Switch to CH3 or CH4 whichever is not used in your area to Permits audio connection of you VCR to a sound Equipment view tape in play mode and to use your TV set as a monitor.

  • Page 14: Instrument Disassembly

    INSTRUMENT DISASSEMBLY Perform all disassembly procedures in the order presented. When reassembling, use the reverse procedure. Make sure that all leads/wiring are routed correctly when reassembling. Top Cover Removal Bottom Cover Removal (Fig. 1) (Fig. 3) 1. Remove three(3) screws Holding the top cover. 1.
  • Page 15 INSTRUMENT DISASSEMBLY (Continued) PCB Preamp Assembly Removal Main PCB Assembly Removal (Fig. 5) (Fig. 7) 1. Remove the top cover, the front panel and the bottom cover. 1. Remove the top cover, the front panel, the bottom cover, the 2. Disconnect the FPC (A). preamp assembly and the deck assembly.
  • Page 16 MECHANICAL DISASSEMBLY & Fig. 9 - Tape Transport Mechanism Identification (Top View) 1. Earth Bracket Ass’y 11. T-Sub Brake Ass’y 2. FE Head 12. Relay Lever 3. S-Slant Pole Ass’y 13. Capstan Motor 4. Tension Lever Ass’y 14. Pinch Lever Total Ass’y 5.
  • Page 17 MECHANICAL DISASSEMBLY (Continued) “ ‘ 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.
  • Page 18 MECHANICAL DISASSEMBLY (Continued) & 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 Link R 9. Door Opener 4. Release Lever 10. Safety Lever 5.
  • Page 19 MECHANICAL DISASSEMBLY (Continued) Front Loading Mechanism Removal 4. Remove one (1) screw holding the prism link R and remove (Fig. 12) the prism link R from the F/L bracket R (Fig. 14). NOTE: The front loading mechanism must be in the eject position to remove it.
  • Page 20 MECHANICAL DISASSEMBLY (Continued) ƒR Screws are different 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.
  • Page 21 MECHANICAL DISASSEMBLY (Continued) Fig. 21-1- A/C Head Assembly Alignment L/C Bracket Assembly Removal (Fig. 22) 1. Remove one (1) screw ! from the L/C bracket assembly @ Fig. 20- Loading Gears/Loading Rack Alignment and remove the L/C bracket assembly @ from the deck mechanism (Fig.
  • Page 22 MECHANICAL DISASSEMBLY (Continued) & Fig. 23- L/C Bracket Assembly Alignment Cam Gear, and F/L Rack Removal (Fig. 22) 1. Remove the cam gear & from the deck mechanism. 2. Remove the relay lever ^ from the main base %. 3. Remove the F/L rack * from the deck mechanism. Fig.
  • Page 23 MECHANICAL DISASSEMBLY (Continued) FE Head Removal (Fig. 31) Remove one (1) screw (1) and lift the FE head (2) from the main base. Fig. 28- Tension Band Fig. 27- Tension Band Assembly Alignment Assembly Removal (II) With Main Base Capstan Motor Removal (Fig.
  • Page 24 Some disassembly is required to access the adjustment locations. Refer to the "Disassembly Selection" in this publication for disassem- bly instructions. Caution: Use an isolation transformer when servicing. 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 instructions to con- firm the following: 1.
  • Page 25 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 are aligned with each other in the EJECT mode (Fig. 3). Fig.
  • Page 26 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 the hole "C" of the Loading Rack aligns with the circular mark "D"...
  • Page 27 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 Proccedures". 2. Play back cassette torque meter (play torque) for about 20 seconds (wait until the tape transporting system comes to be stable). 3.
  • Page 28 Operating the VCR Without a Cassette Tape 1. Remove the cassette Loading Mechanism. 2. By hand revolve the worm counterclockwise 7-8 times until the pole base loading process starts automatically. 3. Then PLAY mode appears. If you want ANOTHER mode, Press the desired button. 4.
  • Page 29 MECHANICAL ADJUSTMENTS (Continued) Tape Path Alignment Procedures The tape transporting system is precisely aligned at the factory and under the normal circumstances will not require adjustment. However, if noise appears in the playback picture, then either the tape damage occured or the tape path has been changed, and readjust- ment of the tape path is necessary.
  • Page 30 THE SCHEMATIC DIAGRAM OF TAPE TRANSPORTING SYSTEM & ¤ TENSION POLE ¤ T-GUIDE ROLLER ¤ŁS-GUIDE POST ¤ A/C HEAD ¤ØFE HEAD ¤ T-GUIDE POST ¤ŒS-GUIDE ROLLER ¤æCAPSTAN SHAFT ¤ºS-SLANT POLE ¤ PINCH ROLLER ¤ DRUM ¤ VERTICAL POST ¤ T-SLANT POLE Fig.
  • Page 31 ADJUSTMENT PROCEDURES 3. Audio Azimuth Adjustment 1). Play back the Alignment Tape (SP mode) with the following 1. Rough adjustment of S&T Guide Rollers signal. When the parts shown in Fig. 9 are substituted, Tape Path can NTSC: 7KHz PAL: 6KHz change.
  • Page 32 7. Linearity Adjustment (Fig. 15) Test Points: CTL Pulse Test Pin Path Adj. Fixture Envelope Test Pin Path Adj. Fixture Observe: Oscilloscope Adjust: VR Control Path Adj. Fixture S/T Guide Rollers Transport Mech. 1). Connect the Path Adj. Fixture to PT01 on the Main circuit board.
  • Page 33 9. Transitional Operation Confirmation (Review to Play) (Fig. 18) Test Points: CTL Pulse Test Pin Path Adj. Fixture Envelope Test Pin Path Adj. Fixture Observe: Oscilloscope Adjust: VR Control Path Adj. Fixture S/T Guide Rollers Transport Mech. 1).Connect the Path Adj. Fixture to PT01 on the Main circuit board.
  • Page 34 10. Audio Output Confirmation (AC Head Tilt/Height 12. X-Axis Adjustment (Fig. 19) Adjustment Test Points: CTL Pulse Test Pin Path Adj. Fixture Test Points: Audio Out Audio Out Jack Envelope Test Pin Path Adj. Fixture Observe: Oscilloscope Observe: Oscilloscope Adjust: VR Control Path Adj.
  • Page 35 AC001 (K584NZ-SJ/M, K584NZ-SG/M only()
  • Page 40 CIRCUIT OPERATIONS 1. TIMER/SERVO/SYSCON CIRCUIT 1) PIN NAME & FUNCTION OF I-CHIP MICOM NAME PORT IN/OUT ASSIGNMENT ACTIVE IIC CLK P80/PBCTLmom OUTPUT HIFI, EEPROM IC CLOCK SERIAL LMref(H) CAP PWM P76/PWM1 OUTPUT CAPSTAN CONTROL PWM OUTPUT PULSE DRUM PWM P75/PWMO OUTPUT DRUM CONTROL PWM OUTPUT PULSE...
  • Page 41 NAME PORT IN/OUT ASSIGNMENT ACTIVE KEYIN 1 INPUT KEY DATA INPUT HIGH KEYIN 2 INPUT HIGH SEG 0 OUTPUT VFD SEGMENT OUTPUT PORT HIGH SEG 1 OUTPUT SEG 2 OUTPUT SEG 3 OUTPUT SEG 4 OUTPUT SEG 5 OUTPUT SEG 6 OUTPUT SEG 7 OUTPUT...
  • Page 42 2) FUNCTIONS BY BLOCK ! CTL Amplification & Waveshaping circuit CTL amplifier amplifies CTL signal read by CTL (–) Head, about 60dB regardless of modes. This amplified signal becomes a waveform in point A, and then output to CTL waveshaping through C508. Rec CTL signal is recorded to CTL (+) terminal by pin #21 during Rec mode.
  • Page 43 @ START/END SENSOR CIRCUIT IR LED START SENSOR SENSOR As it is difficult to deliver light due to direct insertion of IR LED & sensor on main PCB, it is delivered by reflection through prism. # Reel sensor circuit Reel sensor is directly inserted on main PCB and the transmission type is applied as below. Capstan motor speed in high-speed rewind mode is controlled by calculating the remain time of a tape with supply reel and take-up reel pulse.
  • Page 44 @ Grid/Segment Map – – – – – – – – – – – – – – – – – – – – – – – – 4) FL display Bias Circuit -24V D717 3.9V R703...
  • Page 45 2. PIF & INPUT SELECTOR 1) Outline The circuit to tune proper signal of broadcasted radio frequency (RF: VHF, UHF) and to demodulate it to baseband signal for record. It is composed of two parts, TMI and Input selector. The former makes RF signal changed to composite video signal and audio signal, and the latter selects line input and RF input. * Refer to "PIF &...
  • Page 46 MODULATOR / TUNER / DEMODULATOR BLOCK DIAGRAM (MODULATOR SECTION) (TUNER SECTION) (DEMODULATOR SECTION) (IF SECTION) ANT IN Mixer Video RF Amp Filter Detector RF Carrier Oscillator Detector Filter RF Amp Mixer Video Modulator Modulator ANT OUT 4.5MHz Tank AUDIO IN CH SW VIDEO IN CLOCK DATA ENABLE...
  • Page 47 4) The name and function of Pins of Switching IC (LA7152); Hi-Fi Only Pin No. Name Function INPUT 1 CONTROL 1 INPUT 2 Tuner INPUT PIN CONTROL 2 TUNER/LINE SELECT, TUNER 'H' INPUT 3 LINE INPUT PIN MUTE OUTPUT VIDEO OUTPUT PIN Vcc 5V 5) The name and function of Pin on MPX module (Hi-Fi Only) Pin No.
  • Page 48 6) Operation When the RF signal received by antenna is input to TMI Antenna Input and user selects a channel, the CH control data (clock, data, enable) memorized in a MI-COM is output. The data runs PLL IC of TMI tuner part and outputs the selected channel to IF module. The input signal in IF module is demodulated to video signal on video detector part through IF amp and saw filter, and is output through 4.5MHz trap circuit.
  • Page 49 8) The operation of MPX IC (SBX 1837) Hi-Fi Only ! L + R (MAIN) MPX signal is input from Pin 39 (COMP IN), and SAP and TELEMETRY signals are suppressed by stereo LPF. Then, pilot cancel is carried out. Finally L-R and SAP signals are eliminated by MAIN LPF and frequency characteristics are rendered flat by de-emphasis to be input to the matrix.
  • Page 50 ST.LED 2fH 0˚ DRIVE PILOT fH 90˚ (VCO) MODE fH 0˚ CONTROL (COMP IN) STEREO LPT MAIN LPF DE EM (MAIN OUT) (MAIN IN) PILOT CANCEL SUB LPF (SBU OUT) MATRIX (L-OUT) (DSB) (ST IN) L–R NR SW (R-OUT) SAP (FM) dbx-TV SAP BPF SAP LPF (SAP OUT)
  • Page 51 3. VIDEO & AUDIO CIRCUIT 1) Video circuit ! EEmode 1.0V Vp-p video signal out of jack or TMI (Tuner, modulator, If) is input to SW IC151. One of them is selected and output to Pin 14 and them input to Pin 42 of IC301 (LA71004) for video signal process. This signal is amplified 6dB through sync and peak AGC (Auto Gain Control) and 2Vp-p signal is output Pin 39 through QV/QH Insert circuit.
  • Page 52 B. Color Signal Processing The FM signal input to pin 11 of IC301, which is originally come from pin 10 of ICA01, passes through 1.3MHz LPF to pass only 629KHz color signal down-converted in record mode. ACC (Automatic Color Control) AMP stabilized the color signal. The stabilized signal is input to main converter and mixed with the 4.21MHz signal come from sub-converter.
  • Page 53 REC LUMINANCE PROCESS IC151 IC301 LINE JACK INPUT SELECT AGC AMP 6M LPF COMB FILTER NL EMPH W/D CLIP DETAIL ENHANCER MAIN EMPH CLAMP BUFFER MODULATOR 2HD * IC A01 (PRE AMP) Y-FM OUT REC EQ HEAD CHROMA IC A01 REC COLOR PROCESS IC151 IC301...
  • Page 54 PB LUMINANCE PROCESS IC301 ICA01 EQ AMP FM EQ PHASE COMP HEAD 2HD 7 FM AGC DOUBLE LIMITTER FM DEMOD SUB LPF IC302 MAIN DEEMPHASIS BUFFER 3M LPF DOUBLE NONLINEAR PICTURE NOISE Y/C MIX QV/QH INSERT DEEMPHASIS CONTROL CANCELLER LINE JACK VIDEO AMP IC S01 PB COLOR PROCESS...
  • Page 55 OSD IC PIN NAME & FUNCTION Pin Functions Pin No Symbol Function Ground Xtal Crystal oscillator connection Xtal OUT1 HSYNC Horizontal synchronization output Xtal Crystal oscillator connection Xtal OUT2 VSYNC Vertical synchronization output Enable input Data input SCLK Clock input SECAM SECAM mode switch input/output (command switch) 525/625...
  • Page 56 2) Audio circuit 1) Outline This Audio Circuit use LA71004M A/V one chip IC of Sanyo's. The major feature of this IC is that has a Recording Bias current auto- control circuit. So it is controlled by circuit automatically to keep consistent Recording current regardless change of head impedance. Prior IC is used variable resistor to control Recording current passively.
  • Page 57 3) Control Mode Specification ! Mute control (pin 54) Control Port Function Mode Mute Line SW Mute open Except for Mute close H: 1.8~5.0V, L: 0.0~1.2V @ PB/EE control (pin 55) Control Port Mode PB/EE H: 3.3~5.0V, L: 0.0~2.7V # REC/EE control (pin 56) Control Port Mode REC/EE...
  • Page 58 $ Rec Mode ¤˝When Rec "H" signal is applied, Audio Head (Rec) point will be opened (EE & PB: GND) and coil will be oscillated by switching circuit for High voltage and then starting rec. mode. ¤˛Electronic potential difference between Vcc (5V) and pin #3 has to be in 2.0-4.3V to coil oscillate. In other words, Voltage of pin #3 has to be in 0.7~3.0V p-p.
  • Page 59 ¤ In case of this IC, Peaking the high band frequency inside of IC itself without Peaking Coil using reactance of R/P Head. This is a different to prior Audio circuit. So, to adjust frequency characteristics, in this circuit, we are using R223 & C222. Fig.
  • Page 60 ELECTRICAL ADJUSTMENTS Fig. 1 - Circuit Board Location...
  • Page 61 ELECTRICAL ADJUSTMENTS (2HEAD & 4HEAD MODEL) A/V JACK PT01 POWER SUPPLY SHIFTER R595 DECK ASSAMBLY ƒR FRONT Fig. 2 - Main board test point/control location guide (Component)
  • Page 62 ELECTRICAL ADJUSTMENTS (2HEAD & 4HEAD MODEL) PG (Pulse Generator) Shifter Adjustment (Fig. 3) PT01 PIN # Test Points: Main Video Out Jack Rear Panel Adjust: R595 (PG Shifter) Main The Pulse Generator (PG) Shifter determines the video head switching point during playback. Misadjustment of the PG Shifter may cause head switching noise in the picture and/or ver- tical jitter.
  • Page 63 LUMA/CHROMA WAVEFORMS (IC301-11) 400mVp-p (IC301-11) 450mVp-p (IC301-15) 380mVp-p (IC301-14) 1.3Vp-p 200mV/10µsec/cm 200mV/10µsec/cm 200mV/5µs/cm 500mV/10µsec/cm PLAY PLAY & (IC301-22) 450mVp-p (IC301-26) 520mVp-p (IC301-27) 510mVp-p (IC301-29) 550mVp-p 200mV/5ms/cm 200mV/10µsec/cm 200mV/10µsec/cm 200mV/10µsec/cm PLAY & (IC301-29) 550mVp-p (IC301-30) 520mVp-p (IC301-30) 540mVp-p (IC301-32) 480mVp-p 200mV/10µsec/cm 200mV/10µsec/cm 200mV/10µsec/cm 200mV/10µsec/cm...
  • Page 64 LUMA/CHROMA WAVEFORMS (IC301-37) 5.2Vp-p (IC301-39) 2.4Vp-p (IC301-39) 2.4Vp-p (IC301-44) 5Vp-p 1V/5msec/cm 1V/10µsec/cm 1V/10µsec/cm 2V/10msec/cm PICTURE SEARCH PLAY REC/PLAY (IC301-49) 600mVp-p 200mV/0.5µsec/cm REC/PLAY...
  • Page 65 AUDIO WAVEFORMS (IC301-57) 90mVp-p (IC301-59) 1.5Vp-p (IC301-60) 0.3Vp-p (IC301-64) 2Vp-p 20mV/0.2msec/cm 0.5V/0.2msec/cm 50mV/0.2msec/cm 0.5V/0.2msec/cm “ ‘ (IC301-8) 85mVp-p (T201-5) 60Vp-p (T201-6) 75Vp-p 20mV/0.5msec/cm 30V/20µsec/cm 40V/20µsec/cm PLAY...
  • Page 66 SERVO WAVEFORMS (IC601-3) 5.5Vp-p (IC601-4) 5Vp-p (IC601-18) 5Vp-p (IC601-23) 5Vp-p 2V/5µsec/cm 2V/5µsec/cm 2V/5msec/cm 2V/10msec/cm REC/PLAY REC/PLAY REC/PLAY REC/PLAY (IC601-24) 5Vp-p (IC601-22) 5Vp-p (IC601-39) 5Vp-p (IC605-7) 4Vp-p 2V/0.5msec/cm 2V/0.2msec/cm 2V/50msec/cm 2V/5msec/cm REC/PLAY REC/PLAY REC/PLAY REC/PLAY (IC605-1) 4Vp-p (IC605-1) 3Vp-p 2V/5msec/cm 1V/5msec/cm PLAY...
  • Page 67 1) PREAMP VOLTAGE CHARTS (2HEAD) MODE PREAMP MODE PREAMP REW/ REV/FWD PLAY REW/ REV/FWD PLAY PIN No. PIN No. STOP PLAY STOP PLAY F.FWD SEARCH PAUSE PAUSE F.FWD SEARCH PAUSE PAUSE 2) PREAMP VOLTAGE CHARTS (4HEAD) MODE PREAMP MODE PREAMP REW/ REV/FWD PLAY...
  • Page 68 MODE POWER MODE POWER REW/ REV/FWD PLAY REW/ REV/FWD PLAY PIN No. PIN No. STOP PLAY STOP PLAY F.FWD SEARCH PAUSE PAUSE F.FWD SEARCH PAUSE PAUSE SM801(S) Q801 43.5 43.7 43.5 43.4 43.5 43.4 43.5 12.5 12.4 12.5 12.5 12.5 12.6 12.5 10.3...
  • Page 69 MODE IC VIDEO/AUDIO MODE IC VIDEO/AUDIO REW/ REV/FWD PLAY REW/ REV/FWD PLAY PIN No. PIN No. STOP PLAY STOP PLAY F.FWD SEARCH PAUSE PAUSE F.FWD SEARCH PAUSE PAUSE Q201 -17.5 -17.5 -17.5 Q202 -17.5 -17.5 -17.5 Q203 0.7-3.0 0.7-3.0 Q204 Q205 0.7-3.0 Q301...
  • Page 70 5) OSD VOLTAGE CHARTS MODE IC OSD MODE IC OSD REW/ REV/FWD PLAY REW/ REV/FWD PLAY PIN No. PIN No. STOP PLAY STOP PLAY F.FWD SEARCH PAUSE PAUSE F.FWD SEARCH PAUSE PAUSE .5.0 6) TMI PIN VOLTAGE (HI-FI & MONO) MODE MODE PIN NO...
  • Page 71 7) SWITCHING IC PIN VOLTAGE MODE MODE PIN NO EE. REC EE. REC PIN NO EE. REC EE. REC (TUNER) (LINE) (TUNER) (LINE) IC151 Q152 Q153 Q154 9.0¡ 12¡¡ 9.0¡ 12¡¡ 9.0¡ 12¡¡ 9.0¡ 12¡¡ ¡: K584NY-SJ/M, K584NZ-SJ/M, K584NZ-SG/M ¡¡: K584N-SJ, K584N-JJ, K584N-SG, K484N-SJ, K484N-JJ, K484N-SG, K384N-SJ, K284N-SJ, K504N-SJ, K504NY-SG/X, K304N-SJ...
  • Page 72 8) SERVO/SYSCON/TIMER u-COM VOLTAGE CHARTS MODE U-COM MODE U-COM REW/ REV/FWD PLAY REW/ REV/FWD PLAY PIN No. PIN No. STOP PLAY STOP PLAY F.FWD SEARCH PAUSE PAUSE F.FWD SEARCH PAUSE PAUSE -23.8 -11.8 -14.8 -14.8 -11.8 -7.5 -9.5 -23.8 -20.0 -11.7 -15.7 -15.7...
  • Page 73 MODE U-COM MODE U-COM REW/ REV/FWD PLAY REW/ REV/FWD PLAY PIN No. PIN No. STOP PLAY STOP PLAY F.FWD SEARCH PAUSE PAUSE F.FWD SEARCH PAUSE PAUSE ( ): LED MODEL MODE IC DRIVE MODE IC DRIVE REW/ REV/FWD PLAY REW/ REV/FWD PLAY PIN No.

  • Page 74: Power Circuit

    TROUBLESHOOTING GUIDES POWER CIRCUIT Caution: When checking the primary circuit, be sure to use an isolation transformer. NO OUTPUT Voltage Does the AC power cord Change AC CORD check OK? Is 140V supplied to pin !,@ Check F801/L801/ of SM801 primary? D801/C806 Is output voltage of SM801 Change SM801...
  • Page 75 TROUBLESHOOTING GUIDES (Continued) SERVO/SYSCON/LOGIC CIRCUIT Digitron does not operate. Is+5V supplied to Check the pin of IC601? L604/L606/D803 Is-24V supplied to Check power circuit. pin of IC601? Are -20 and -16.5V Check the power circuit supplied to pin and D717 of G701? Is 5V at pin Check IC604.
  • Page 76 TROUBLESHOOTING GUIDES (Continued) LED or Digitron is lit but key do not operate. Is each key pulse Check key matrix applied to pin , 49 50 circuit. of IC601? Check IC601 1 minute back up timer does not operate. When disconnecting the power cord,Is 5.0V Check C813.
  • Page 77 TROUBLESHOOTING GUIDES (Continued) When change the channel broadcast signal is not received. Is the output of pin , , and of IC601 Check IC601 77 79 normal? Check the Video, Check the video output Check the Audio output signal of signal pin of IC151? IC601...
  • Page 78 TROUBLESHOOTING GUIDES (Continued) Playback picture is not good. Noise appears although adjusting Adjust tracking. tracking. Noise shakes up Noise appears Check and and down on the although change re-adjust the screen. cassette tape. Path of Deck. Adjust the HEAD Is CTL pulse applied CTL HEAD height is height and remove normal and there is...
  • Page 79 TROUBLESHOOTING GUIDES (Continued) Playback picture is not good. Noise appears over the entire Check TS Flowchart (E) screen Is SW pulse supplied Are SW pulse and Check D.PG input from pin 8 of IC601 (IC601 pin +) HA SW applied to PRE-AMP circuit? and connector (P502) Check pattern...
  • Page 80 TROUBLESHOOTING GUIDES (Continued) Drum Motor dose not rotate. Is 12V supplied to P502 Check power circuit. pin !? Is D.PWM (pin $) Check IC601 and D.FG. of IC601 correct Is the voltage of P502 pin @ Check R503, R523 and C506 1.2V? Check connector (P502) and DRUM Motor...
  • Page 81 TROUBLESHOOTING GUIDES (Continued) Drum Motor and Capstan M/T rotate at irregular speed(In REC mode). Is C.Sync applied to Check C.Sync of video circuit. pin ‹ of IC601? Check IC601 The instrument goes into the emergency mode front display shows "err"when AC power is connected.
  • Page 82 TROUBLESHOOTING GUIDES (Continued) Cassette loading inoperative. Is Motor 12V Check power circuit. (IC602 pin & and *) suppiled? Is 6V applied to pin $ of Check R631, D601, IC602 IC602. Is 5V applied to pin ^ of Pin R of IC601. IC602 when CST IN? Is 6.2V applied to pin ) of Change IC602.

  • Page 83: Video Circuit

    TROUBLESHOOTING GUIDES (Continued) VIDEO CIRCUIT EE MODE Picture NG Is video signal input into pin ! Check PIF circuit and and 2 of IC151 LINE IN JACK Is 9V supplied at pin 6 Check Power circuit. of IC151 Check IC601 pin M Is signal output from pin 4 Tuner mode: H of IC151...
  • Page 84 TROUBLESHOOTING GUIDES (Continued) PB video signal missing (2-head model) Is envelope output from Is 5V supplied at Check power ICA01 pin & ? ICA01 pin 5 ? circuit Is SW pulse input into Check IC601 ICA01 pin @ ? pin 8 Clean head or change head Is signal input at IC301...
  • Page 85 TROUBLESHOOTING GUIDES (Continued) Record video signal NG (2 head model) Check EP mode Is Iuminance and color Is signal input into Check input selector signal output from IC301 pin o ? circuit IC301 pin 1,4 ? Is REC color and FM luminance Check RA01, RA02, CA11 signal input into ICA01 pin &,* ? Is +5V supplide at...
  • Page 86 TROUBLESHOOTING GUIDES (Continued) PB video signal missing (4-head and 4-head Hi Fi model) Is envelope output from Is 5V supplied at Check power ICA01 pin ) ? ICA01 pin 5 ? circuit Is SW pulse input into Check IC601 ICA01 pin % ? pin 8 Clean head or change head...
  • Page 87 TROUBLESHOOTING GUIDES (Continued) Record video signal NG (4 head and 4-head HiFi model) Check EP mode Is Iuminance and color Is signal input into Check input selector signal output from IC301 pin o ? circuit IC301 pin 1,4 ? Is REC signal input into Check RA01, RA02, CA11 ICA01 pin 1 ? Is +5V supplied at...
  • Page 88 TROUBLESHOOTING GUIDES (Continued) OSD Character Incorrect. Is 5V supplied at ICS01 pin e,7 ? Check Power circuit. Is composit video signal Check IC301 output from IC301 pin I ? Check serial data ICS01 pin *,(,) Check IC601 Change ICS01...
  • Page 89 TROUBLESHOOTING GUIDES (Continued) AUDIO CIRCUIT 2-Head 4-Head model No sound in the E-E mode Is 5V applied to pin y,],J ? Check Power circuit of IC301? Is signal input pin G of IC301 Check INPUT JACK in Line mode? Is 0V of Pin d,F,f Check SYSCON circuit Is there output at pin Change IC301...
  • Page 90 TROUBLESHOOTING GUIDES (Continued) No sound in the playback mode. Is the output at pin H Is 5V applied to pin y, Check power circuit ],J of IC301? of IC301? Is 5V applied to pin F of Check R221, R222, R203, IC301? C221.
  • Page 91 TROUBLESHOOTING GUIDES (Continued) No sound in the playback mode after recording. Check the following procedure in RECORD mode. Check PIF&INPUT Is the signal applied to pin G of IC301? SELECT circuit Is pin F of IC301 0V? Check IC601 Is 5V applied to Pin f of IC301? Is there output at Check IC301...
  • Page 92 INTERCONNECT WIRING DIAGRAM K584N/K484N/K384N/K284N...
  • Page 93 POWER SUPPLY SCHEMATIC DIAGRAM (FREE VOLTAGE) K584NY-SJ/M, K584NZ-SJ/M, K584NZ-SG/M...
  • Page 94 POWER SUPPLY SCHEMATIC DIAGRAM (120V ONLY) K584N-SJ, K584N-JJ, K584N-SG, K484N-SJ, K484N-JJ, K484N-SG, K384N-SJ, K284N-SJ, K504N-SJ, K504NY-SG/X, K304N-SJ...
  • Page 95 2HD HEAD-AMP SCHEMATIC DIAGRAM K384N, K284N, K304N...
  • Page 96 4HD HEAD-AMP SCHEMATIC DIAGRAM K584N, K484N, K504N...
  • Page 97 VIDEO & AUDIO SCHEMATIC DIAGRAM K584N, K484N, K384N, K284N, K504N, K304N...
  • Page 98 PIF & INPUT SELECTOR SCHEMATIC DIAGRAM (9V USE) K584NY-SJ/M, K584NZ-SJ/M, K584NZ-SG/M...
  • Page 99 PIF & INPUT SELECTOR SCHEMATIC DIAGRAM (12V USE) K584N-SJ, K584N-JJ, K584N-SG, K484N-SJ, K484N-JJ, K484N-SG, K384-SJ, K284N-SJ, K504N-SJ, K504NY-SG/X, K304N-SJ...
  • Page 100 TIMER & SYSCON SCHEMATIC DIAGRAM K584N, K484N, K384N, K284N, K504N, K304N...
  • Page 101 POWER SUPPLY BLOCK DIAGRAM (FREE VOLTAGE) K584NY-SJ/M, K584NZ-SJ/M, K584NZ-SG/M...
  • Page 102 POWER SUPPLY BLOCK DIAGRAM (120V ONLY) K584N-SJ, K584N-JJ, K584N-SG, K484N-SJ, K484N-JJ, K484N-SG, K384N-SJ, K284N-SJ, K504N-SJ, K504NY-SG/X, K304N-SJ...
  • Page 103 2HD HEAD-AMP BLOCK DIAGRAM K384N, K284N,K304N...
  • Page 104 4HD HEAD-AMP BLOCK DIAGRAM K584N, K484N, K504N...
  • Page 105 VIDEO & AUDIO BLOCK DIAGRAM K584N, K484N, K384N, K284N, K504N, K304N...
  • Page 106 PIF & INPUT SELECTOR BLOCK DIAGRAM K584N, K484N, K384N, K284N, K504N, K304N...
  • Page 107 SYSCON/SERVO BLOCK DIAGRAM SEG C~SEG F SEG A~SEG L SEG A~SEG L G1~G8 G1~G8 K584N, K484N, K384N, K284N, K504N, K304N...
  • Page 108 PACKING AND ACCESSORY ASS'Y & Part Name Part No. Q'ty Description Remark K504N PAD FRONT/BACK 97P4925200 K304N K584N 97P4922300 K484N K384N K284N POLYBAG FOR SET 97P4803100 P.E ROAM BOX CARTON 97P5043000 EX300*SCP150*EX300 MANUAL OWNERS 97P9560000 ALL MODEL CABLE RF 97P880RN15 NTSC 1.5M COVER ACCESSORY 97P0424100...
  • Page 109 MAIN PCB (2HEAD/4HEAD)
  • Page 110 LODING MOTOR PCB FE HEAD EVER 5V C.F(L)/R(H) CAPSTAN FG FULL ERASE C.CTL REF F.E HEAD CAPSTAN C.CONTROL HEAD F.E HEAD MOTOR C.I-LIMIT C.MTR VCC C.MTR GND MAIN P201 C.IC GND MAIN P501 DRUM MOTOR PCB A/C HEAD PCB D.MTR VCC A/C HEAD PCB D.SPD CTL CONTROL...
  • Page 111 ELECTRICAL PART LIST 1. PCB MAIN AS BASIC LED VCR+ SYM NO PART-CODE PART-NAME PART-DESC MODEL -DIS &2HRS PVPWSWN339 AUTO VOLT REGULATOR K584NY-SJ/M(L088C,MAIN-IN) ƒNSM801 % SM801 97PB222600 AUTO VOLT REGULATOR DV-K5F4N-SJ C161 HCBK223KCA C CHIP CERA 50V X7R 0.022MF K 2012 C162 CEXF1H109V C ELECTRO...
  • Page 112 BASIC LED VCR+ SYM NO PART-CODE PART-NAME PART-DESC MODEL -DIS &2HRS C307 CBZP1C103M C CERA SEMI 16V Y5S 0.01MF M (AXIAL) C308 CBZP1C103M C CERA SEMI 16V Y5S 0.01MF M (AXIAL) C309 HCLK391JCA C CHIP CERA 50V SL 390PF J 2012 C311 HCLK201JCA C CHIP CERA...
  • Page 113 BASIC LED VCR+ SYM NO PART-CODE PART-NAME PART-DESC MODEL -DIS &2HRS C605 HCQK180JCA C CHIP CERA 50V CH 18PF J 2012 C606 HCQK180JCA C CHIP CERA 50V CH 18PF J 2012 C607 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 C608 HCBK103KCA C CHIP CERA...
  • Page 114 BASIC LED VCR+ SYM NO PART-CODE PART-NAME PART-DESC MODEL -DIS &2HRS A CH1CEE332M C CERA AC 2.5KV 3300PF M DE AC 250V A CH1FEE332M C CERA AC 2.5KV 3300PF M KH AC 250V % C806 CEXF2E680V C ELECTRO 250V RSS 68MF CEXN2G820P C ELECTRO 400V LHS 82MF...
  • Page 115 BASIC LED VCR+ SYM NO PART-CODE PART-NAME PART-DESC MODEL -DIS &2HRS D706 DZN4148--- DIODE 1N4148 AUTO 52MM D707 DZN4148--- DIODE 1N4148 AUTO 52MM D708 DZN4148--- DIODE 1N4148 AUTO 52MM D709 DZN4148--- DIODE 1N4148 AUTO 52MM D712 DSR5323V-- SR5323V D713 DSR5323V-- SR5323V D714 DSR5323V--...
  • Page 116 BASIC LED VCR+ SYM NO PART-CODE PART-NAME PART-DESC MODEL -DIS &2HRS JP147 RD-AZ102J- R CARBON FILM /6 1K OHM J L151 5CPX100J-- COIL PEAKING PL 10UH J (TAPPING) L152 5CPX688M-- COIL PEAKING 0.68UH 5MM M RADIAL L153 5CPX100J-- COIL PEAKING PL 10UH J (TAPPING) L201 5CPX101J--...
  • Page 117 BASIC LED VCR+ SYM NO PART-CODE PART-NAME PART-DESC MODEL -DIS &2HRS A TSTC1740Y- STC1740-Y Q202 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) A TZSC945CY- KSC945C-Y (AYTO) A TSTC1740Y- STC1740-Y Q203 TZTC3202Y- KTC3202Y (AUTO)(1959Y) A TSTC1741Y- STC1741-Y A TZTC1959Y- KTC1959-Y (AUTO) A TZTC3205Y- KTC3205Y (AUTO) A TZSC2328AY KSC2328A-Y (AUTO) Q204...
  • Page 118 BASIC LED VCR+ SYM NO PART-CODE PART-NAME PART-DESC MODEL -DIS &2HRS RD-AZ914J- R CARBON FILM 1/6 910K OHM J ƒNR167 % R167 RD-AZ564J- R CARBON FILM 1/6 560K OHM J R168 RD-4Z621J- R CARBON FILM 1/4 620 OHM J R170 HRFT000-CA R CHIP 1/10 0 OHM 2012...
  • Page 119 BASIC LED VCR+ SYM NO PART-CODE PART-NAME PART-DESC MODEL -DIS &2HRS R363 HRFT204JCA R CHIP 1/10 200K OHM J 2012 R364 RD-AZ104J- R CARBON FILM 1/6 100K OHM J R373 HRFT822JCA R CHIP 1/10 8.2K OHM J 2012 R399 HRFT133JCA R CHIP 1/10 13K OHM J 2012 R501...
  • Page 120 BASIC LED VCR+ SYM NO PART-CODE PART-NAME PART-DESC MODEL -DIS &2HRS R619 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R620 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R621 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R622 HRFT304JCA R CHIP 1/10 300K OHM J 2012 R623...
  • Page 121 BASIC LED VCR+ SYM NO PART-CODE PART-NAME PART-DESC MODEL -DIS &2HRS R713 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING RC-2Z565K0 R CARBON COMP 1/2 5.6M OHM K ƒNR801 % R801 RD-2Z335J- R CARBON FILM 1/2 3.3M OHM J RW02B229J- R WIRE WOUND 2W 2.2 OHM J ƒNR803 % R803...
  • Page 122 BASIC LED VCR+ SYM NO PART-CODE PART-NAME PART-DESC MODEL -DIS &2HRS A 5S50101Z96 SW TACT KSM0614BTS 9.5M AUTO A 5S50101Z98 SW TACT EVQ11L90K 9.5MM AUTO SW707 5S50101Z97 SW TACT SKHV10914A 9.5M AUTO A 5S50101Z96 SW TACT KSM0614BTS 9.5M AUTO A 5S50101Z98 SW TACT EVQ11L90K 9.5MM AUTO SW708...
  • Page 123 BASIC LED VCR+ SYM NO PART-CODE PART-NAME PART-DESC MODEL -DIS &2HRS RA01 HRFT821JCA R CHIP 1/10 820 OHM J 2012 RA02 HRFT101JCA R CHIP 1/10 100 OHM J 2012 2HD RA05 HRFT303JCA R CHIP 1/10 30K OHM J 2012 4HD RA06 HRFT162JCA R CHIP 1/10 1.6K OHM J 2012...

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