Daewoo DV-K*84W Series Service Manual
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Daewoo DV-K*84W Series Service Manual

Daewoo DV-K*84W Series Service Manual

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Service Manual
Video Cassette Recorder
Model: ALL K-MECHA
 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).
DAEWOO ELECTRONICS CO., LTD.
S/M No. : KMUB1M1U01
MULTI MODELS
PAL/MESECAM/NTSC
(DV-K*84W Series)
(DV-K*64W Series)
(DV-K*24W Series)
(DV-K8K4W)
(DV-K#44W Series)
(DV-K#04W Series)
(DV-K#A4W Series)
(DV-K#B4W Series)
Note: 1. * : 8/4/2
2. # : 4/2

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Summary of Contents for Daewoo DV-K*84W Series

  • Page 1 : 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). DAEWOO ELECTRONICS CO., LTD.

  • Page 2: Table Of Contents

    REDORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE...
  • Page 3 S P E C I F I C A T I O N • • • • • • • • • • • • • • GENERAL AUDIO Power requirement : AC 110-240V~,50/60Hz (For M.East) Recording system : Longitudinal track : AC 230V~, 50Hz (For Others) : -8 dBm, (CENELEC standard), ..

  • Page 4: Safety Check After Servicing

    I N F O R M A T I O N • • • • • • • • • • • • • • • 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.

  • Page 5: Controls And Functions

    CONTROLS AND FUNCTIONS SECTION 1. RONT & STAND-BY PLAY STOP/ EJECT REC/OTR VIDEO AUDIO ¡ NOTE: The above front panel to DV-K884W. for conforms the other sets (machines), refer to page 80, 81, Front panel assembly. ! STAND BY $ PLAY BACK @ STOP/EJECT % REWIND/REVIEW # CHANNEL UP/DOWN SELECTION...

  • Page 6: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS SECTION 2. 2-1. S ERVO IRCUIT DJUSTMENT ETHOD 1. PLAYBACK PHASE ADJUSTMENT PARTS CHECKING POINT MEASURING EQUIPMENT MODE TEST TAPE JP009 V.OUT Check Oscilloscope Play DP-2 PT01 PIN $ • CONNECTION METHOD PRE-AMP JP009 VIDEO OUT CH-2 • OSCILLOSCOPE CH-1 PATH JIG...

  • Page 7: If Module Circuit Adjustment Methods

    2-2. I ODULE IRCUIT DJUSTMENT ETHODS 1. AFT ADJUSTMENT PARTS CHECKING POINT TEST EQUIPMENTS INPUT SIGNAL Signal Gen. P102 L101 Oscilloscope Refer to the following. PIN & Power Supply • AFT CONNECTION METHOD IF MODULE PCB (TOP VIEW) Modulation Method : 30% AM fm : 400Hz fc : 38.9MHz (COMPONENT SIDE)
  • Page 8 2. RF AGC ADJUSTMENT PARTS CHECKING POINT TEST EQUIPMENTS INPUT SIGNAL Signal Gen. P101 L191 Oscilloscope Refer to the following. PIN & Power Supply • RF AGC CONNECTION METHOD IF MODULE PCB (TOP VIEW) Modulation Method : 30% AM fm : 1KHz fc : 38.9MHz (COMPONENT SIDE) SIGNAL LEVEL : 95dBµV...

  • Page 9: Circuit Operation Principles

    CIRCUIT OPERATION PRINCIPLES SECTION 3. 3-1. P OWER IRCUIT 1. OUTLINE The part that supply DV VOLTAGE to each circuit change AC input voltage into DC voltage. It is based on SMPS(switching mode power supply) system which is located on main PCB. SMPS module is composed of the switching circuit and the transformer of the primary part and the recitifier circuit of the secondary part.
  • Page 10 3. GENERAL CIRCUIT OPERATION The circuit shown is a highly accurate 37V, 12.4V, 6.0V, -27V, 4.5V, 20W secondary regulated flyback power supply that will operate from 85V to 265 VAC input voltage. The input voltage is rectified and filtered by D801 and C1. L801, C801, C804 reduce conducted emissin current. C806, L801, C805 reduce common mode noises.

  • Page 11: Key Features Of Video Ic And Its Relatives

    3-2. K EATURES OF IDEO ELATIVES 1. LA71501BM (QIP 80 PIN): NORMAL AUDIO & Y/C SIGNAL PROCESSING IC 1) Applicable to Multi system (PAL-GBI,MESECAM,3.58NTSC, 4.43NTSC and NAP-GBI) 2) Built-in NAP circuit to convert NTSC to PAL. 3) Normal audio signal processing circuit. (self-alignment for record bias) 4) Buit-in distinction SECAM signal circuit (MESECAM) 5) Built-in Record and Playback FM-EQ function (Switching the specific characteristic is possible by SERIAL CONTROL) 6) Y/C separation using comb filter...
  • Page 12 1)LUMINANCE SIGNAL PROCESSING (RECORD) DETAIL BUFFER CLAMP ENHANCER 1H DELAY REC EQ (LC89978M) MAIN N.L. PRE-AMP 9th PIN REC EQ FM MOD EMPHASIS EMPHASIS FIG.2 Luminance Signal Processing (RECORD) The input signal through FBC is reduced 6dB of its level and then the pure luminance signal is obtained by LOW-PASS FILTER.
  • Page 13 2. PLAYBACK PROCESSING luminance signal PRE-AMP processing 7th PIN Y/C MIX VIDEO AMP chrominance signal processing OSD IC 18th PIN PB ENVE FIG.4 Playback Processing The playback ENVE signal from PRE-AMP is supplied to 15th pin of A/V IC for processing the PAL luminance and chrominance.
  • Page 14 2)CHROMINANCE SIGNAL PROCESSING (PB) PRE-AMP ACC AMP MAIN CONV BPF2 BPF1 7th PIN 2H DELAY (LC89978M) Y/C MIX FIG.6 Chrominance Signal Processing (PB) The down converted chrominance PAL-COLOR signal is obtained by LPF from PB ENVE. And then the signal is up-converted to 4.43MHz or 3.58MHz by the MAIN CONVERTER. The redundant harmonice is filtered out by the BPF, and then the signal is applyed to the CCD IC to reduce the chrominance crosstalk.

  • Page 15: If Circuit Operation

    3-4. IF C IRCUIT PERATION 1. VIDEO SIGNAL FLOW PRE- VIDEO DET SOUND VIDEO BUFFER MIXER FILTER & DEMOD TRAP LOCAL TUNER µ-COM The signal from the ANT is amplified for selectivity, to decrease image interference, and increase S/N using the RF AMP.
  • Page 16 2. PAL AUDIO FLOW (Two carrier) (Hi-Fi only model) intercarrier AUDIO OUT (L) VIDEO DET SOUND LIMITER FM PLL- AUDIO OUT (R) & DEMOD DEMOD. STEREO(LOW) FM PLL- DIGITAL VIDEO BLOCK DUAL(LOW) DEMOD. INTEGRATOR The FM sound intercarrier signal passing through the 5.5MHz/5.74MHz (DK: 6.5MHz) sound BPF is fed to a limiter amplifier before it is demodulate.
  • Page 17 4. TM BLOCK The TUNER and MODULATOR which is separated to each module conventionally, is presently united to one block (TM block) (a) PLL METHOD AND I C-BUS CONTROL The RF OUTPUT channel can be varied from 22CH to 69CH by remote control using PLL method and I C-BUS control.

  • Page 18: Normal Audio Signal Processing(La71501Bm)

    3-5. N (LA71501BM) ORMAL UDIO IGNAL ROCESSING The circuitry of Normal AUDIO part is similar to that of the conventional Normal AUDIO part in case of EE and PB mode, but in REC mode, due to the internal opeation of self-alignment, it shows a lot of differences. 1.

  • Page 19: Hi-Fi Audio Signal Processing(Bh7804K)

    3) The output AUDIO signal at the 1st pin through REC AMP is recorded on HEAD after being mixed with the 70KHz AC BIAS signal. At the same time, the output AUDIO signal is supplied to the 3rd pin and then filtered by 60KHz HPF, so only the 70KHz AC BIAS signal is passed.
  • Page 20 2. REC MODE EMPH INPUT EMPH REC FM 1.4M AUDIO AUTO REC FM OUT REC FM 1.8M AUDIO (1) Signal Flow In this system, the input signal sources are contained with IF, AV and F.AV. each pin number’s decription is the same as the below.
  • Page 21 3. PB MODE SW NOISE DEMOD COMPEN FM PB IN D.O. HOLD A SW PULSE GEN PULSE SW NOISE DEMOD COMPEN Hi-Fi DET ENVE/ HiFi AUDIO OUT(L) DE-EMPH OUTPUT MOD OUT DE-EMPH AUDIO OUT(R) NORMAL AUDIO (1) Signal Flow FM signal input to the Pin 13rd is amplified, and ditributed to the two BPFs-1.4MHz and 1.8MHz (NTSC Case: 1.3MHz &...

  • Page 22: Troubleshooting Flow Chart

    TROUBLESHOOTING FLOW CHART SECTION 4. 4-1. P OWER IRCUIT When changing the parts which are broken first, remove the power plug from the socket and then discharge the voltage across the terminals of C807 (use an external 1KΩ(2W) resistance). When check the primary circuit, Use the oscilloscope isolated properly (Use the isolated transformer) and connect GND to the primary GND, however it is not necessary to isolate the oscilloscope when check the secondary circuit.
  • Page 23 B. CHECKING THE SECONDARY CIRCUIT Check transformer of NO Check each output voltage output stages Check the diode of NO output stages Check the COIL, C of NO Check the CN21 output stages FLOW CHART...

  • Page 24: Pif Circuit

    4-2. PIF C IRCUIT ROUBLESHOOTING A. TROUBLESHOOTING OF RF RECEIVING CIRCUIT Check the A/V Switching and Is Video Signal Video Out point, Video Circduit. P101 Pin No. 4 of IF Module? Is Audio signal at Audio Out point, P102 Pin No.2/No. 4 of IF Module? Is +5V supplied to BB point, Check the Power Supply Circuit.
  • Page 25 B. TROUBLESHOOTING OF RF MODULATOR OUT Check the A/V Switching, Video Is Video Signal Video In point, and Audio Circduit. Pin No. 6 of TM Block? Is Audio signal at Audio In point, Pin No.2 of TM Block? Are RF OUT System and RF Out Select the RIGHT System and channel selected well by menu key.

  • Page 26: Logic Circuit

    4-3. L OGIC IRCUIT Digitron does Is +5.8V supplied Check power Module not operate. fdrom D509 cathod? Is +5V supplied to Check power pin c of IC501? Module Is 24V supplied to Check power pin C of IC501? Module Are -20 and -16.5V Check power supplied to pin e and Module...

  • Page 27: Servo-Syscon Circuit

    4-4. S ERVO YSCON IRCUIT Playback picture Adjust tracking. is not good Noise appears Noise appears Check and re-adjust although although the path of Deck. adjusting tracking. change cassette tape. CTL HEAD height Adjust the HEAD Is CTL pulse output is normal and height and at pin ^ of IC505?
  • Page 28 Playback picture is not good. Noise appears on the Noise appears on the Check flow A. screen on the whole. screen at the bottom Adjust the PG in SVC mode. Are SW-pulse and HA-SW Is sw pulse supplied Check D.PG input from pin 8 of IC501? applied to preamp circuit? and connector.
  • Page 29 Auto-stop during playback. Is reel pulse applied to Check reel sensor. pin % and ^of IC501? Is D. FG applied to Check connector and pin = of IC501? D. FG circuits. Check IC501. FLOW CHART...
  • Page 30 Drum M/T loading stops. Is motor 12V supplied Check Q504. to IC502 & *pin 12V? Check power module. Is 6V supplied to Check Q504. pin $ of IC502? Check P503 and Change IC502 Loading motor Check connector and motor. FLOW CHART...
  • Page 31 Capstan M/T loading stops. Check power Module. Is motor 13V supplied? Is the input of pin ^ Check circuit of R559, of P501 2.5V~3.5V? R558, R513. Check R555, R556. Is pin $ of P501 2.5V? Does pin $ of IC501 Check IC501.
  • Page 32 Drum M/T and capstan M/T rotate at regular speed. (IN REC MODE) Is C. sync applied to Check C. sync of video of IC501? IC and pattern. Check motor Emergency mode when plugging (power cord) Is ever 5V applied? Check power Module. Does X501 crystal Check IC501 and X501.
  • Page 33 Cassette is not inserted. Is motor 13V supplied? Check power Module. (at pin @ of CN21) CAM DATA is changed Check connector. when CST IN? Check Deck part. Is 5V supplied at Is 5V applied to pin % of pin R of IC501? IC502 when CST IN?) Check pattern Check IC501.
  • Page 34 Power compensation does not operate. When mains is unplugged, is 3.6V at pin qc and Check C501, C521. N of IC501? Is (sine) signal applied to Check X502. pin o and P of IC501? Check reset circuit Is 5V at pin U of IC501? of IC504.

  • Page 35: Audio Circuit (Normal)

    4-5. A UDIO IRCUIT ORMAL A. TROUBLESHOOTING OF PB MODE. No sound in the playback mode Is 5V applied to pin 76 Is the output at pin V of IC301 and is 5.8V Check power circuit of IC301? applied to pin @ of T201? Is less then 0.2V Is clock and data applied Check Hi-Fi,...
  • Page 36 B. TROUBLESHOOTING OF REC MODE No sound in the playback mode after recording Is signal input into pin Check Hi-Fi, X of IC301? A/V select circuit Is 5V applied to pin c of IC301 and is 5.8V Check SYSCON applied to pin @ of IC301 Is the voltage above 4V Is clock and data applied Check SYSCON...

  • Page 37: Audio Circuit (Hi-Fi)

    4-6. A UDIO IRCUIT A. TROUBLESHOOTING OF EE MODE. No sound in the EE mode Is +5V supplied to the pin 8, y of IC251? Check the Power circuit. Is +5V supplied to the pin I of IC251? Is signal input into the in !, @ of IC251 Check the PIF circuit.
  • Page 38 B. TROUBLESHOOTING OF Hi-Fi REC AND PB No Hi-Fi sound in the playback mode Is the FM ENVE supplied Check the Preamp module. to the pin 3of IC251? Is A. SW pulse input to the Check the SYSCON. pin 0 of IC251? Are the clock and data supplied to the pin % ^ of IC251?

  • Page 39: Video Circuit

    4-7. V IDEO IRCUIT A. TROUBLESHOOTING OF EE MODE. Is ON/OFF +5V supplied Check the ON/OFF +5V to pin y and pin } of IC301? Is the obtained from Is C354, R322, C357, pin e or pin w C313 and C321 correct? of IC301? Check JK601, PJ103, or Change damaged...
  • Page 40 B. TROUBLESHOOTING OF PRE-AMP IN THE PLAYBACK MODE. Is the signal from heads fed to pin % and pin & Check the drum and (SP mode) or pin ! and deck mechanism pin # (LP mode) of P402? Is ON/OFF +5V from pin c of IC301 supplied to pin Check the ON/OFF +5V 9 of IC401 at 5volt?
  • Page 41 C. TROUBLESHOOTING OF PRE-AMP CIRCUIT IN THE RECORD MODE. Is the Y-FM signal from pin Check C314, R304 8 of IC301 fed to pin 5 correct? of IC401? TO LUMINANCE SIGNAL Change damaged IN THE RECORD MODE components Is the down converted colour signal from pin 4 of IC301 Check C315 correct? fed to pin 6 of IC401?
  • Page 42 D. TROUBLESHOOTING OF LUMINANCE SIGNAL IN THE RECORD MODE. Is ON/OFF +5V supplied to Check the ON/OFF +5V pin y and pin } of IC301? Is the obtained from TO EE MODE pin t of IC301? Is the signal from pin t of Is C322 correct? IC301 fed to pin Q of IC301? Change damaged...
  • Page 43 E. TROUBLESHOOTING OF COLOUR IN THE RECORD MODE. Is ON/OFF 5V supplied to pin y and pin } of Check the ON/OFF +5V IC301? Is the obtained from pin t of TO EE MODE IC301? Is the color signal from Check IC302, PCB and pin a of IC301 to pin s of adjacent circuit...
  • Page 44 F. TROUBLESHOOTING OF LUMINANCE IN THE PLAYBACK MODE. Is the RF signal obtained from TO PRE-AMP IN THE pin 3 of IC401? PLAYBACK MODE Is the RF signal from pin 3 of Check Q305, adjacent IC401 fed to pin 5 of IC301? and PCB pattern Is ON/OFF +5V supplied to Check the ON/OFF +5V...
  • Page 45 G. TROUBLESHOOTING OF COLOUR IN THE PLAYBACK MODE. Is the RF signal obtained from TO PRE-AMP IN THE pin 3 of IC401? PLAYBACK MODE Is the RF signal from pin 3 of Check Q305, adjacent IC401 fed to pin 5 of IC301? and PCB pattern Is ON/OFF +5V supplied to Check the ON/OFF +5V...

  • Page 46: Waveforms On Video Circuit

    WAVEFORMS ON VIDEO CIRCUIT SECTION 5. 5-1. W EE M AVEFORMS IN OLOR BAR INPUT ! Pin 30 of IC301 @ Pin 30 of IC301 # Pin 38 of IC301 (SECAM color bar input : (PAL color bar input : (PAL color bar output : 1.0Vp-p 1.0Vp-p)
  • Page 47 5-3. W PAL C AVEFORMS OF OLOR IN THE ECORD OLOR BAR INPUT 2 Pin 35 of IC301 3 Pin 48 and 50 of IC301 4 Pin 52 of IC301 (PAL color input : (300mVp-p) (400mVp-p) 1.0Vp-p) 5 Pin 37 of IC301 6 Pin 14 of IC301 7 Pin 10 of IC401 (C.SYNC : 2Vp-p)
  • Page 48 5-5. W PAL C PB M (DP-1 AVEFORMS OF OLOR IN THE TEST TAPE E UP : Pin 66 of IC301(color) e Pin 37 of IC301 R Pin 48 and 50 of IC301 rotary : 0.5Vp-p) (Video out : 2.0Vp-p) (240mVp-p) DOWN : Pin 20 of IC301 (500mVp-p)

  • Page 49: Μ-Com Port

    COM PORT SECTION 6. µ- *P: Pulse, H: High, L: Low IC 501 (168KKVZGTS) A/D: A/D convert port, serial: serial Data/Clock NAME ASSIGNMENT ACTIVE IF ON(H) RF MODE ‘H’ OUTPUT OTHERWISE ‘L’ OUTPUT AUDIO MUTE(H) AUDIO MUTE H OUTPUT A/V 1CHIP D.
  • Page 50 NAME ASSIGNMENT ACTIVE ENABLES TO CONTROL HA SW PULSE WHEN SPECIAL TRICK(H) Hi-Fi/PRE-AMP OPERATIONS (CUE/REV/STILL) ARE OPERATING TV/VCR MODE SWITCHING ON TV TV/VCR TV MODE:H, VCR MODE:L ACTIVE IN DIGITRON ACK OUT NTSC COLOR KILLER OUT A/V 1CHIP LM F LM R OUTPUT LOADING MOTOR FORWARD...
  • Page 51 NAME ASSIGNMENT ACTIVE KEY IN1 KEY & OPTION DATA INPUT KEY IN2 KEY & OPTION DATA INPUT SEGMENT 0 SEGMENT 1 SEGMENT 2 SEGMENT 3 SEGMENT 4 SEGMENT 5 SEGMENT 6 SEGMENT 7 SEGMENT 8 SEGMENT 9 SEGMENT 10 SEGMENT 10 SEGMENT 10 SEGMENT 10 SEGMENT 10...
  • Page 52 NAME ASSIGNMENT ACTIVE POWER WHEN POWER IS DISCONNECTED THIS PORT FAIL(L) DETECTS POWER FAILURE AND THEN GOES INTO POWER COMPENSATION MODE START SENSOR TAPE START SENSOR DATA INPUT START SENSOR A/D INPUT R501 DRUM SEL PAL 4H’D 45/50 30/30 2.5~3.125 PAL 2H’D 40/40 40/40 1.25~1.875 4.7K AFT ANALOG DATA INPUT FOR AUTO FINE TUNING...

  • Page 53: Voltage Charts

    VOLTAGE CHARTS SECTION 7. Voltage Charts TDA9814T for IF IC (IC101) MODE PAL- B/G MODE PAL- B/G NTSC REMARKS REMARKS NTSC TWO CARRIER TWO CARRIER PIN NO. PIN NO. Conditions Conditions :EE MODE :EE MODE X:Variable TDA9845 for IF IC (IC121) MODE MODE PAL- B/G...
  • Page 54 LA71501BM for VIDEO/AUDIO IC (DC:Voltage) (IC301) PIN NO. PIN NO. PIN NO. PIN NO. 2.44 2.40 0.35 0.39 0.06 0.06 2.05 2.02 0.01 0.00 1.56 2.25 2.00 1.97 0.21 0.26 2.44 2.41 0.02 1.80 0.48 0.47 4.48 4.48 1.03 0.05 2.41 1.82 1.83...
  • Page 55 ELECTRO CAPACTIOR POSITIVE NEGATIVE POSITIVE NEGATIVE C002 5.02 0.00 C309 2.93 0.00 C007 2.83 2.76 C315 2.93 1.40 C012 4.51 0.00 C317 1.64 0.00 C008 2.75 1.71 C320 4.05 0.00 C201 0.00 0.00 C322 3.11 2.21 C203 2.38 0.01 C324 5.03 0.00 C207...
  • Page 56 6209 for M/T DRIVE IC (IC502) 24LC08B for EEPROM IC (IC503) PIN NO. PIN NO. 0.52 0.52 0.84 5.15 4.95 4.75 11.3 11.2 11.3 11.2 5.26 0.86 0.52 0.52 A7033P for RESET IC (IC504) MC4558C for OPAMP IC (IC505) PIN NO. PIN NO.
  • Page 57 AV SW PART TR EMITTER COLLECTOR BASE PORTS LOC. Q601 2.30 2.40 0.00 0.00 1.70 Q602 5.30 5.30 0.00 0.00 4.60 4.60 Q603 5.40 5.40 0.00 0.00 4.70 4.70 Q604 3.20 2.40 0.00 0.00 2.50 1.75 Q605 5.40 5.40 0.00 0.00 4.70 4.70...
  • Page 58 AUDIO PART TR EMITTER COLLECTOR BASE PORTS LOC. Q201 1.82 5.46 2.41 Q202 5.19 5.16 -28.77 4.53 Q203 -23.44 0.01 0.68 -28.26 Q204 -23.44 -28.58 Q205 0.02 5.43 1.64 0.02 0.86 PIF PART TR (EE MODE) PORTS EMITTER COLLECTOR BASE REMARKS LOC.

  • Page 59: Service Mode

    SERVICE MODE SECTION 8. 8-1. S ERVICE ITEM REMARKS ¤ Press the [MENU] button to go to [MAIN MENU] ¤ MAIN MENU screen and press the number 484 in sequence then go to [SERVICE MODE] screen. ¤ATimer Program Timer Review VCR Setup ¤ŁDisplay language is ENGLISH only.
  • Page 60 8-2. SVC M ODE FOR EPAIR 1. ERROR CHECK MODE ITEM REMARKS ¤ Press the number 1 button, then OSD ¤ is ¤ SVC MODE FOR REPAIR displayed in the initial SVC mode screen. ⁄U DECK JIG CONNECTION MODE (OFF) ⁄V EE MODE WITHOUT DECK MODE (OFF) ⁄W ERROR CHECK MODE...
  • Page 61 2. DECK JIG CONNECTION MODE ITEM REMARKS ¤ Press the number 1 button, OFF ¡Œ ON is toggled in the SVC MODE FOR REPAIR screan. * The initial state is set to OFF mode. 3. EE MODE WITHOUT DECK ITEM REMARKS ¤...
  • Page 62 8-4. C EEPROM DATA HANGE OF ITEM REMARKS * CHANGE OF EEPROM DATA MODE is used for change the VIDEO/AUDIO characteristic data. 0 0 1 1 1 0 1 A:AUTO 1 1 1 1 1 1 1 0 P:PAL ¤ Press the number 3 button, OSD ¤ will be displayed 1 0 0 0 0 0 1 0 in the initial SVC mode screen.
  • Page 63 8-7. H I CHECK MODE ITEM ¤ Press the number 3 button, OSD ¤ will be displayed the initial SVC mode screen. Hi-Fi CHECK MODE ¤ŁPress the number 1 key in the ¤ screen, then the auto adjust mode is executed for the Hi-Fi FM carrier. ⁄U AUTO ADJUST OK in the screen, binking the “Check..”...
  • Page 64 ADDRESS 00 AUTO COLOR KILLER (NORMAL) 00 AUTO COLOR KILLER (NORMAL) 00 LP 00 REC 000 0001 10 FORCED KILLER 10 FORCED KILLER 10 EP 10 PB GROUP 1 01 FORCED COLOR 01 FORCED COLOR 01 SP/CARRIER SHIFT STOP 01 EE COMMON 11 PROHIBIT 11 PROHIBIT...
  • Page 65 8-11. S A/V 1 (PAL 4H‘D/H ANYO CHIP ERIAL PAL SP EE/REC/PB TRICK PLAY GROUP1 0 GROUP1 0 GROUP2 1 GROUP2 1 GROUP3 1 GROUP3 1 GROUP4 1 GROUP4 1 GROUP5 0 GROUP5 0 GROUP6 1 GROUP6 0 GROUP7 0 GROUP7 0 GROUP8 1 GROUP8 1...
  • Page 66 NTSC SP EE/REC/PB TRICK PLAY GROUP1 0 GROUP1 0 GROUP2 0 GROUP2 0 GROUP3 1 GROUP3 1 GROUP4 1 GROUP4 1 GROUP5 0 GROUP5 0 GROUP6 1 GROUP6 0 GROUP7 0 GROUP7 0 GROUP8 1 GROUP8 1 GROUP9 0 GROUP9 0 NTSC EP(SLP) EE/REC/PB TRICK PLAY...
  • Page 67 8-12. S A/V 1 (PAL 4H‘D) ANYO CHIP ERIAL PAL SP EE/REC/PB TRICK PLAY GROUP1 0 GROUP1 0 GROUP2 1 GROUP2 1 GROUP3 1 GROUP3 1 GROUP4 1 GROUP4 1 GROUP5 0 GROUP5 0 GROUP6 1 GROUP6 0 GROUP7 0 GROUP7 0 GROUP8 1 GROUP8 1...
  • Page 68 NTSC SP EE/REC/PB TRICK PLAY GROUP1 0 GROUP1 0 GROUP2 0 GROUP2 0 GROUP3 1 GROUP3 1 GROUP4 1 GROUP4 1 GROUP5 0 GROUP5 0 GROUP6 1 GROUP6 0 GROUP7 0 GROUP7 0 GROUP8 1 GROUP8 1 GROUP9 0 GROUP9 0 NTSC EP(SLP) EE/REC/PB TRICK PLAY...
  • Page 69 8-13. S A/V 1 (PAL 2H‘D(SP/LP) ANYO CHIP ERIAL PAL SP EE/REC/PB TRICK PLAY GROUP1 0 GROUP1 0 GROUP2 1 GROUP2 1 GROUP3 1 GROUP3 1 GROUP4 1 GROUP4 1 GROUP5 0 GROUP5 0 GROUP6 1 GROUP6 1 GROUP7 0 GROUP7 0 GROUP8 1 GROUP8 1...
  • Page 70 NTSC SP EE/REC/PB TRICK PLAY GROUP1 0 GROUP1 0 GROUP2 0 GROUP2 0 GROUP3 1 GROUP3 1 GROUP4 1 GROUP4 1 GROUP5 0 GROUP5 0 GROUP6 1 GROUP6 0 GROUP7 0 GROUP7 0 GROUP8 1 GROUP8 1 GROUP9 0 GROUP9 0 NTSC EP(SLP) EE/REC/PB TRICK PLAY...

  • Page 71: Circuit Diagram

    CIRCUIT DIAGRAM SECTION 9. 9-1. C (DV-K884W/K484W/K284W) ONNECTION IAGRAM CIRCUIT DIAGRAMS...

  • Page 72: Power Circuit Diagram

    9-2. P (DV-K884W/K484W/K284W) OWER IRCUIT IAGRAM CIRCUIT DIAGRAMS...

  • Page 73: Syscon And Logic Circuit Diagram

    9-3. S YSCON AND OGIC IRCUIT IAGRAM CIRCUIT DIAGRAMS...

  • Page 74: Pif Circuit Diagram

    9-4. PIF C (DV-K884W/K484W/K284W) IRCUIT IAGRAM CIRCUIT DIAGRAMS...

  • Page 75: If/Mpx Module Circuit Diagram

    9-5. IF/MPX M (DV-K884W/K484W/K284W) ODULE IRCUIT IAGRAM CIRCUIT DIAGRAMS...

  • Page 76: Video/Audio Circuit Diagram

    9-6. V (DV-K884W/K484W/K284W) IDEO UDIO IRCUIT IAGRAM CIRCUIT DIAGRAMS...

  • Page 77: Hi-Fi/Pre-Amp Circuit Diagram

    9-7. Hi-Fi/PRE-AMP C (DV-K884W/K484W/K284W) IRCUIT IAGRAM CIRCUIT DIAGRAMS...

  • Page 78: Pcb Main

    DISASSEMBLY SECTION 11. 11-1. P ’ ACKING DISASSEMBLY...

  • Page 79: Pcb If Module

    11-2. F RONT ANEL SSEMBLY DISASSEMBLY...

  • Page 80: Dv-K 24W, Dv-K8K4W, Dv-K#44W, Dv-K#04W,Dv-K#84W, Dv-K#B4W)

    ¡ NOTE: # : 4 / 2 DV-K#44W(97PD179300) DV-K#04W(97PD185800) DV-K#B4W(97PD189100) DV-K#84W(97PD190100) DV-K#A4W(97PD189000) DV-K#64W(97PD191900) DV-K#24W(97PD192700) DISASSEMBLY...
  • Page 81 11-3. I NSTRUMENT ISASSEMBLY 1. TOP COVER REMOVAL (FIG. 1) 1) Remove five (5) screws holding the top cover. 2) Carefully lift the back of the top cover and slide to the rear to remove. FIG. 1 µ-COM PORT...

  • Page 82: Packing Ass'y

    2. FRONT PANEL REMOVAL (FIG. 2-1) 1) Remove the top cover. 2) Release seven (7) tabs holding the front panel. 3) Remove front panel. FIG. 2-1 PARTS LIST...

  • Page 83: Front Panel Assembly

    FRONT PANEL REMOVAL (FIG. 2-2) 1) Remove the top cover. 2) Remove two (2) screws securing front panel. 3) Remove the F/L bracket. 4) Release seven (7) tabs holding the front panel. ¡ NOTE: 5) Remove the front panel. # : 4 / 2 REMOVE TWO SCREWS DV-K#44W...
  • Page 84 3. BOTTOM COVER REMOVAL (FIG. 3) 1) Remove the top cover and front panel. 2) Remove three (3) screws. 3) Release four (4) tabs and lift out the bottom cover. FIG. 3 PARTS LIST...

  • Page 85: Instrument Disassembly

    4. F/L DOOR REMOVAL (FIG. 4) 1) Open the F/L DOOR 90°. 2) Remove the F/L DOOR in the direction of arrow. FIG. 4 µ-COM PORT...
  • Page 86 5. PCB LOGIC ASS’Y REMOVAL (FIG. 5-1) 1) Release two (2) tabs holding the PCB LOGIC AS. 2) Tilt PCB LOGIC AS forward to remove in the direction of arrow. FIG. 5-1 PARTS LIST...
  • Page 87 PCB LOGIC ASS’Y REMOVAL (FIG. 5-2) 1) Release two (2) tabs holding the PCB LOGIC AS. 2) Tilt PCB LOGIC AS forward to remove in the direction of arrow. ¡ NOTE: # : 4 / 2 DV-K#44W DV-K#A4W DV-K#04W DV-K#64W DV-K#84W DV-K#B4W DV-K#24W...
  • Page 88 6. PCB MAIN AS/DECK AS REMOVAL (FIG. 6) 1) Remove five (5) screws. 2) Disconnect the CONNECTOR and FPC. 3) Pull out the DECK AS and COVER PRE-AMP in the direction of arrow. FIG. 6 PARTS LIST...
  • Page 89 7. PCB MAIN AS REMOVAL (FIG. 7) 1) Remove two (2) screws. 2) Release three (3) tabs and lift out the PCB MAIN in the direction of the arrow. FIG. 7 µ-COM PORT...
  • Page 90 ELECTRICAL PARTS LIST SECTION 12. 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) 12-1.
  • Page 91 APACITOR ODING 1. NORMAL Distance Value TYPE DISTANCE (Same As (Same as Fixed Resistor) CODE TPYE Code Voltage Fixed Resisor) 6.3V Aluminum Barier Layer (Same as Fixed Ceramic Resistor) Shape Electrolytic Line Across Characteristic Mylar Styrol Metalized Polyester Mica 100V 125V Tantal 160V...
  • Page 92 DV-K884W PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC B1910 97S8103600 L/C MOTOR MDH2B70 PVACPSD395 ACCESSORY AS DV-F882DY-CK B1940 5SSF1DKM10 SW CAM MMS00320ZMBO D001 97P9560000 MANUAL OWNERS ALL MODEL A0210 97SA311600 IDLER PLATE AS K-MECHA D002 97P880RP10 CABLE RF PAL 1.0M A0220 97S3108200 POLYWASHER D2.6XD6.0XT0.5...
  • Page 93 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC PC11 1LTV817AB- IC PHOTO COUPLER LTV817M CTR 80-160 Z106 5PCB6R500A FILTER CERA SFSH6.5MCB 6.5MHZ RS01F334J- R M-OXIDE FILM 1W 330K OHM J Z107 5PCB4R500A FILTER CERA SFSH4.5MCB 4.5MHZ 57M8282200 TRANS SMPS TSW-K884 Z121 5PSFE574MC FILTER CERA SFE 5.74MC T11A...

  • Page 94: Electrical Parts List

    PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC R145 HRFT361JCA R CHIP 1/10 360 OHM J 2012 JP17 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING 1012 PVPAJRW054 PCB PIF RADIAL AS K884WZ-RG/D(97PC311000) JP19 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING C108 CEXF1H229A C ELECTRO 50V RSM 2.2MF (4X7) TP JP20...
  • Page 95 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC PJ201 97P8811614 CONN AS 6H-6S 140MM SHIELD C206 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF Z 2012 PJ202 97P8851210 CONN AS (Y51210) 2H-2S 100MM C209 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF Z 2012 PJ503 97P8810712 CONN AS (Y10712)
  • Page 96 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC C456 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 RJ020 HRF8000-EA R CHIP 1/8 0 OHM 3216 C457 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 RJ021 HRF8000-EA R CHIP 1/8 0 OHM 3216 C458 HCFK104ZCA C CHIP CERA...
  • Page 97 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC R280 HRFT241JCA R CHIP 1/10 240 OHM J 2012 R541 HRFT105JCA R CHIP 1/10 1M OHM J 2012 R281 HRFT103JCA R CHIP 1/10 10K OHM J 2012 R544 HRFT104JCA R CHIP 1/10 100K OHM J 2012 R301 HRFT391JCA R CHIP...
  • Page 98 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC C178 CEXF1H100A C ELECTRO 50V RSM 10MF (5X7) TP C501 CDXA0H104K C SUPER 5.5V 0.1F TAPING C179 CEXF1H100A C ELECTRO 50V RSM 10MF (5X7) TP C504 CEXF1E470V C ELECTRO 25V RSS 47MF (5X11) TP C517 CEXF1C470A C ELECTRO...
  • Page 99 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC Q177 TZTA1273Y- KTA1273Y(966Y) C545 CBZP1C103M C CERA SEMI 16V Y5S 0.01MF M Q178 TZSR1001-- KSR1001 (AUTO) D171 DZN4148--- DIODE 1N4148 AUTO 52MM Q179 TZTA1273Y- KTA1273Y(966Y) D251 DZN4148--- DIODE 1N4148 AUTO 52MM Q180 TZSR1001-- KSR1001 (AUTO) D301 DZN4148--- DIODE...
  • Page 100 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC R218 RD-AZ561J- R CARBON FILM 1/6 560 OHM J R561 RD-AZ331J- R CARBON FILM 1/6 330 OHM J R219 RD-AZ182G- R CARBON FILM 1/6 1.8K OHM G R562 RD-AZ331J- R CARBON FILM 1/6 330 OHM J R220 RD-AZ303J- R CARBON FILM...
  • Page 101 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC JP044 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP100 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP045 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP102 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP046 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP103...
  • Page 102 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC JP157 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP211 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP158 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP212 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP159 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP213...
  • Page 103 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC JP272 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING D713 DZN4148--- DIODE 1N4148 AUTO 52M PVLASWW054 PCB LOGIC MANUAL AS K884WZ-RG/D(D528-C) D714 DZN4148--- DIODE 1N4148 AUTO 52MM AL01 2193102005 SOLDER BAR SN:PB=63:47 S63S-1320 JP701 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING AL02...
  • Page 104 PCB IF MODULE AS (4HD/2HD) PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC AI01 2193102005 SOLDER BAR SN:PB=63:47 S63S-1320 R142 HRFT270JCA R CHIP 1/10 27 OHM J 2012 AI02 2193011100 SOLDER WIRE 60 SNA 1.2D R143 HRFT132JCA R CHIP 1/10 1.3K OHM J 2012 AI03 2291050615 FLUX SOLDER...
  • Page 105 PART-CODE PART-NAME PART-DESC R111 RD-AZ221J- R CARBON FILM 1/6 220 OHM J R112 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R118 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R119 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R136 RD-AZ102J- R CARBON FILM 1/6 1K OHM J...

  • Page 106: Section 13. Option Table

    OPTION TABLE SECTION 13. 13-1. HEAD OPTION Hi-Fi 4HEAD 2HEAD LOC PART CODE DESCRIPTION PART CODE DESCRIPTION PART CODE DESCRIPTION B001 97P0718400 HI-PS(HB) 97P0717100 HI-PS(HB) 97P0717100 HI-PS(HB) IC401 1LA70020-- LA70020 1LA70011-- LA70011 1LA70001-- LA70001 JK601 97P6313700 DPAM-9639 97P6313600 DPAM-9640 97P6313600 DPAM-9640 PJ103 97P8811516 5H-5S 160MM...
  • Page 107 Hi-Fi 4HEAD 2HEAD LOC PART CODE DESCRIPTION PART CODE DESCRIPTION PART CODE DESCRIPTION C252 CEXF1H100A 50V RSM 10MF (5X7) TP C253 CMXM2A223J 100V 0.022MF J TP C255 CMXM2A472J 100V 4700PF J (TP) C256 CEXF1A101A 10V RSM 100MF 6.3X7 C257 CEXF1A101A 10V RSM 100MF 6.3X7 C258 CMXM2A472J...
  • Page 108 Hi-Fi 4HEAD 2HEAD LOC PART CODE DESCRIPTION PART CODE DESCRIPTION PART CODE DESCRIPTION JP165 85801065GY AWG22 1/0.65 TIN COATING JP175 85801065GY AWG22 1/0.65 TIN COATING JP176 85801065GY AWG22 1/0.65 TIN COATING JP205 85801065GY AWG22 1/0.65 TIN COATING JP206 85801065GY AWG22 1/0.65 TIN COATING JP207 85801065GY AWG22 1/0.65 TIN COATING JP208 85801065GY...
  • Page 109 Hi-Fi 4HEAD 2HEAD LOC PART CODE DESCRIPTION PART CODE DESCRIPTION PART CODE DESCRIPTION JK701 97P6311300 DSP-9407A JK71A 97P0973700 SUS304 CSP T0.15 P703 97P6271300 00-8283-0511-00000 C751 CXSL1H101J 50V SL 100PF J C752 CXSL1H101J 50V SL 100PF J D707 DZN4148--- 1N4148 AUTO 52MM R751 RD-AZ102J- 1/6 1K OHM J...

  • Page 110: Option Table

    Hi-Fi 4HEAD 2HEAD LOC PART CODE DESCRIPTION PART CODE DESCRIPTION PART CODE DESCRIPTION JP20 85801065GY AWG22 1/0.65 TIN COATING JP34 85801065GY AWG22 1/0.65 TIN COATING 85801065GY AWG22 1/0.65 TIN COATING R112 RD-AZ152J- 1/6 1.5K OHM J RD-AZ103J- 1/6 10K OHM J RD-AZ103J- 1/6 10K OHM J R121...
  • Page 111 13-4. A/V JACK OPTION (PHONO-ONE SCART) JACK PHONO SCART REMARKS LOC. 97P0718400 Hi-Fi BA03 HI-PS (HB): 6PIN 97P0716900 BOARD ANT 97P0717100 HI-PS (HB) MONO HI-PS (HB): 4PIN CEXFIH 100A Hi-Fi C602 50V RSM 10MF (5X7) TP CEXFIH100A PIF PART C ELECTRO 50V RSM 10MF (5X7) TP MONO HCLK 471JCA...
  • Page 112 JACK PHONO SCART REMARKS LOC. RD-AZ102J- Hi-Fi R603 1/6 1K OHM J RD-AZ102J- PIF PART R CARBON FILM 1/6 1K OHM J MONO RD-AZ331J- Hi-Fi R605 1/6 330 OHM J RD-AZ331J- PIF PART R CARBON FILM 1/6 330 OHM J MONO R621 RD-AZ332J-...

  • Page 113: Service Jig Connection Methods

    SERVICE JIG CONNECTION METHODS SECTION 14. ERVICE IXTURE FIXTURE ITEM DESCRIPTION Extension Cable 1 Use for K mecha Drum Motor Connection Cable 97PB400100 Extension Cable 2 Use for K mecha Capstan Motor Connection Cable 97PB400200 Extension Cable 3 Use for K mecha A/C head and L/C Motor Connection Cable 97PB400300 Path Adj Fixture Use for X-position adjust Tape path alignment...
  • Page 114 NOTE: How to executing the unit in the service mode 1) Press the [MENU] button to go to [MAIN MENU] screen and press the number 484 in sequence then go to [SERVICE MODE] screen. 2) Press the number 1 button to call the [SVC MODE FOR REPAIR] screen. 3) Press the number 1 button to call the [DECK JIG CONNECTION MODE(ON)].

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Dv-k*64w seriesDv-k*24w seriesDv-k8k4wDv-k*04w seriesDv-k*a4w seriesDv-k*b4w series ... Show all

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