Daewoo DV-K88 series Service Manual
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Daewoo DV-K88 series Service Manual

Daewoo DV-K88 series Service Manual

Video cassette recorder
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Service Manual
Video Cassette Recorder
Model : ALL K-MECHA Hi-Fi
PAL MODELS
(DV-K88 * Series)
(DV-K86 * Series)
(DV-K82 * Series)
(DV-K8K * Series)
DAEWOO ELECTRONICS CO., LTD.
OVERSEAS SERVICE DEPT.

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  • Page 1 Service Manual Video Cassette Recorder Model : ALL K-MECHA Hi-Fi PAL MODELS (DV-K88 * Series) (DV-K86 * Series) (DV-K82 * Series) (DV-K8K * Series) DAEWOO ELECTRONICS CO., LTD. OVERSEAS SERVICE DEPT.
  • Page 2 S P E C I F I C AT I O N I N F O R M 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) Input : -8 dBm, (CENELEC standard), Power consumption...

  • Page 3: Table Of Contents

    RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDE CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSET RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDE CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSET RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDE CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSET...

  • Page 4: Controls And Functions

    CONTROLS AND FUNCTIONS SECTION 1. Front 1 STAND BY 4 PLAY BACK 2 STOP/EJECT 5 REWIND / REVIEW 3 CHANNEL UP / DOWN SELECTION 6 FAST FORWARD / CUE 7 RECORD / OTR (ONE TOUCH RECORDING) Rear 1 EURO AV2 / DECODER (AV OUT) 3 ANTENNA INPUT TERMINAL 2 EURO AV1 (AV IN) 4 ANTENNA OUTPUT TERMINAL...

  • Page 5: Servo Circuit Adjustment Method

    ELECTRICAL ADJUSTMENTS SECTION 2. 2-1. Servo Circuit Adjustment Method 1. PLAYBACK PHASE ADJUSTMENT PARTS CHECKING POINT MEASURING EQUIPMENT MODE TEST TAPE JP037 V.OUT Check Oscilloscope Play DP-2 PT01 PIN 4 • CONNECTION METHOD PRE-AMP JP037 VIDEO OUT CH-2 • OSCILLOSCOPE CH-1 PATH JIG PT01...

  • Page 6: If Module Circuit Adjustment Methods

    2-2. IF Module Circuit Adjustment Methods 1. AFT ADJUSTMENT PARTS CHECKING POINT TEST EQUIPMENTS INPUT SIGNAL Signal Gen. P102 L101 Oscilloscope Refer to the following. PIN 7 Power Supply • AFT CONNECTION METHOD IF MODULE PCB (TOP VIEW) Modulation Method : 30% AM fm : 400Hz fc : 38.9MHz (COMPONENT SIDE)
  • Page 7 2. RF AGC ADJUSTMENT PARTS CHECKING POINT TEST EQUIPMENTS INPUT SIGNAL Signal Gen. P101 R191 Oscilloscope Refer to the following. PIN 7 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 8: Power Circuit

    CIRCUIT OPERATION PRINCIPLES SECTION 3. 3-1. Power Circuit 1. OUTLINE The part that supply DC 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 rectifier circuit of the secondary part.
  • Page 9 3. GENERAL CIRCUIT OPERATION The circuit shown is a highly accurate 38V, 12.5V, 6.0V, -24V, 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 10: Key Features Of Video Ic And Its Relatives

    3-2. Key Features of Video IC and Its Relatives 1. LA71511M(QOP 80 PIN) : LUMINANCE-CHROMINANCE AND NORMAL AUDIO SIGNAL PROCESSING IC 1) Applicable to multi system : PAL-GBI, MESECAM, 4.43NTSC, NAP-GBI 2) Built-in NAP circuit to convert NTSC to PAL 3) Normal audio signal processing circuit (self-alignment for record bias) 4) Built-in record and playback FM-EQ function (I C bus control)
  • Page 11 1) LUMINANCE SIGNAL PROCESSING (RECORD) CLAMP DETAIL 400nS DELAY FILTER ENHANCER 1H DELAY CLAMP (LC89977M) N.L. MAIN REC EQ FM MOD PRE-AMP 9th PIN EMPHASIS EMPHASIS FIG.2 Luminance Signal Processing (RECORD) The input signal through FBC is reduced a half(-6dB) of its level and then the pure luminance signal is obtained by LPF.
  • Page 12 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 PLAYBACK ENVELOPE signal from the PRE-AMP IC is supplied to the 15th pin of A/V IC for processing the PAL color, luminance respectively.
  • Page 13 2) CHROMINANCE SIGNAL PROCESSING (PB) PRE-AMP ACC AMP MAIN CONV BPF2 BPF1 7th PIN 2H DELAY (LC89977M) Y/C MIX FIG.6 Chrominance Signal Processing (PB) The down-converted chrominance signal is obtained from PB ENVE signal by LPF first. And then the signal is up- converted to 4.43MHz by the MAIN CONVERTER.

  • Page 14: If Circuit Operation

    3-4. IF Circuit Operation 1. VIDEO SIGNAL FLOW PRE- VIDEO DET SOUND VIDEO MIXER BUFFER FILTER & DE MOD 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 15 2. PAL AUDIO FLOW (Two carrier) AUDIO OUT(L) intercarrier VIDEO DET SOUND LIMITER FM PLL- AUDIO OUT(R) & DEMOD DEMOD. STEREO(LOW) DIGITAL 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 16 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 17: Normal Audio Signal Processing(La71511M)

    3-5. Normal Audio Signal Processing (LA71511M) 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 operation of self-alignment, it shows a lot of differences. 1.

  • Page 18: 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 19 2. REC MODE EMPH INPUT AUDIO IN EMPH NORMAL AUDIO 1.4M AUDIO REC FM AUTO REC FM OUT 1.8M AUDIO REC FM (1) Signal Flow In this system, the input signal sources are contained with IF, AV1, AV2/C+ and F.AV. each pin number’s decription is the same as the below.
  • Page 20 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. The band passed FM signals are supplied to the De-Modulator unit.

  • Page 21: Video/Audio Switching Circuit

    3-7. Video/Audio Switching Circuit 1. KA8119B : Special Functions & Features (1) Internal Audio/Video Switch for C+. (2-input, 1-output) (2) Internal Video Selector. (4-input, 1-output) (3) Internal Video 6dB Amp (4) Distinguished Supply Voltage. (Audio : 9V, Video : 5V) 2.
  • Page 22 4. SWITCHING OPERATION In this switching system, Video signals are selected by two A/V SW ICs (KA8119B & LA7152), Audio signals are separately selectd by Hi-Fi IC itself which was controlled by the I C bus. - W3D1, W3D2 mean the serial data bits for the selection.
  • Page 23 - Case 1 TV set : Watching & receiving the normal CH. VCR set : Power off, Input source is turner. TV set signal comes out to the decoder. - Case 2 TV set : Watching the C+ CH which is received by itself. VCR set : Power off, Input source is tuner, Discramble the C+ and supply it to the TV set.
  • Page 24 - Case 14 TV set : Watching & receiving the normal CH. VCR set : EE, TV mode. Input source is AV. TV set signal comes out to the decoder. - Case 15 TV set : Watching the C+ CH received on itself. VCR set : TV mode.
  • Page 25 (2) Three input One output mode. TUNER VIDEO AUDIO MODE TV/VCR /AV1/AV2 REMARKS /F.AV W3D1 W3D2 PIN30 PIN30 POWER PIN30 PIN30 PIN30 PIN30 PIN30 CH SEARCH PLAY PIN30 CH SEARCH PIN30 PIN30 PIN30 PIN30 EE/REC PIN30 PIN30 PIN32 F.AV PIN30 (3) Two input One output mode.
  • Page 26 I N F O R M AT 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. Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards.

  • Page 27: Power Circuit

    TROUBLESHOOTING FLOW CHART SECTION 4. 4-1. Power Circuit 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 28 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 29: Pif Circuit

    4-2. PIF Circuit Troubleshooting A. TROUBLESHOOTING OF RF RECEIVING CIRCUIT Is Video Signal at Video Out point, Check the A/V Switching and Video P101 Pin No. 4 of IF Module? Circuit. 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 30 B. TROUBLESHOOTING OF RF MODULATOR OUT Is Video Signal at Video In point, Check the A/V Switching, Video and Pin No. 6 of TM Block? Audio Circuit. Is Audio Signal at Audio In point, Pin No. 2 of TM Block? Select the RIGHT System and Are RF OUT System and RF Out channel by menu key.

  • Page 31: Logic Circuit

    4-3. Logic Circuit Digitron does Is +5.8V supplied Check power Module not operate. from D509 cathod? Is +5V supplied to Check power pin 76 of IC501? Module Is 24V supplied to Check power pin 75 of IC501? module Are -20 and -16.5V Check power supplied to pin 1 and module...

  • Page 32: Servo-Syscon Circuit

    4-4. Servo-Syscon Circuit Playback picture Adjust tracking. is not good Check and re-adjust Noise appears although Noise appears adjusting tracking. the path of Deck. although change cassette tape. Adjust the HEAD Is CTL pulse output CTL HEAD height height and at pin 6 of IC505? is normal and remove dust.
  • Page 33 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. Check D.PG input Are SW-pulse and HA-SW Is sw pulse supplied and connector.
  • Page 34 Auto-stop during playback. Is reel pulse applied to Check reel sensor. pin 5 and 6 of IC501? Is D. FG applied to Check connector and pin 24 of IC501? D. FG circuits. Check IC501. FLOW CHART...
  • Page 35 Drum M/T loading stops. Is motor 12V supplied Check Q504 to IC502 7 8 pin 12V? Check power module. Is 6.2V supplied to Check D504. Pin 4 of IC502? Check P503 and Change IC502 Loading motor. Check connector and motor. FLOW CHART...
  • Page 36 Capstan M/T loading stops. Is motor 13V supplied? Check power Module. Is the input of pin 6 Check circuit of R559, R558, R513. of P501 2.5V~3.5V? Is pin 4 of P501 2.5V? Check R555, R556. Does pin 4 of IC501 Check IC501.
  • Page 37 Drum M/T and capstan M/T rotate at regular speed. (IN REC MODE) Is C. sync applied to Check C.sync of video pin 93 of IC501? IC and pattern. Check motor. Emergency mode when plugging (power cord) Is ever 5V applied? Check power Module.
  • Page 38 Cassette is not inserted. Is motor 13V supplied? Check power Module. (at pin 2 of CN21) CAM DATA is changed Check connector. when CST IN? Check Deck part. Is 5V applied to pin 5 of Is 5V supplied at IC502 when CST IN? pin 31 of IC501? Check pattern Check IC501.
  • Page 39 Power compensation does not operate. When mains is unplugged, Check C501, C521. is 3.6V at pin 26 76 and 81 of IC501? Is (sine) signal applied to Check X502. pin 42 and 43 of IC501? Check reset circuit Is 5V at pin 37 of IC501? of IC504.

  • Page 40: Audio Circuit (Normal)

    4-5. Audio Circuit (Normal) A. TROUBLESHOOTING OF PB MODE. No sound in the playback mode Is the output at pin 77 Is 5V applied to pin 76 Check power circuit of IC301? of IC301 and is 5.8V applied to pin 2 of T201? Is clock and data applied Is less then 0.2V Check Hi-Fi,...
  • Page 41 B. TROUBLESHOOTING OF REC MODE. No sound in the playback mode after recording Check Hi-Fi, Is signal input into pin A/V select circuit 73 of IC301? Is 5V applied to pin 76 Check SYSCON of IC301 and is 5.8V applied to pin 2 of T201? Is the voltage above 4V Is clock and data applied Check SYSCON...

  • Page 42: Audio Circuit (Hi-Fi)

    4-6. Audio Circuit (Hi-Fi) A. TROUBLESHOOTING OF EE MODE. No sound in the EE mode Is +5V supplied to the pin 18 36 of IC251? Check the Power circuit. Is -5V supplied to the pin 39 of IC251? Is signal Input into the pin Check the PIF circuit.
  • Page 43 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 13 of IC251? Is A. SW pulse input to the Check the SYSCON. pin 20 of IC251? Are the clock and data supplied to the pin 5...

  • Page 44: Video Circuit

    4-7. Video Circuit A. TROUBLESHOOTING OF EE MODE. Is the signal obtained from Check A/V SW circuit pin 8 of IC602 (A/V SW. circuit) Is the video signal from Check PCB pattern pin 8 of IC602 fed to and adjacent circuit pin 30 of IC301? Is ON/OFF 5V supplied to Check ON/OFF 5V...
  • Page 45 B. TROUBLESHOOTING OF PREAMP IN THE PLAYBACK MODE. * IC401 : LA70011 Is the signal from heads Check drum and fed to pin 1 and pin 3 deck mechanism (LP mode) or pin 5 and pin 7 (SP mode) of P402? Is ON/OFF 5V from pin 76 Check ON/OFF 5V of IC301 supplied to pin...
  • Page 46 C. TROUBLESHOOTING OF PREAMP CIRCUIT IN THE RECORD MODE. * IC401 : LA70011 Is the Y-FM signal from pin Check R304, C314 18 of IC301 fed to pin 9 and PCB pattern of IC401? Is the down converted colour Check C315 and pattern signal from pin 14 of IC301 fed to pin 10 of IC401? Is ON/OFF 5V supplied to pin...
  • Page 47 D. TROUBLESHOOTING OF LUMINANCE SIGNAL IN THE RECORD MODE. Is the video signal obtained Check AV SW circuit from pin 8 of IC602 (AV SW circuit)? Is the video signal from pin Check PCB pattern and 8 of IC602 fed to pin 35 adjacent circuits.
  • Page 48 E. TROUBLESHOOTING OF PAL COLOUR IN THE RECORD MODE. Is the video signal obtained from pin 8 of IC602 Check AV SW circuit (A/V SW circuit)? Is the video signal from pin 8 Check PCB pattern and of IC602 fed to pin 35 of IC301? adjacent circuit Is ON/OFF 5V supplied to pin Check ON/OFF 5V...
  • Page 49 F. TROUBLESHOOTING OF LUMINANCE IN THE PLAYBACK MODE. Is Y-FM signal from pin 7 of Check PREAMP circuit IC401 fed to pin 15 of IC301? Is ON/OFF 5V supplied to pin 36 Check ON/OFF 5V and pin 47 of IC301 at 5 volts? Is the luminance signal from pin Check Q301, R301, R302 15 of IC301 fed to pin 25 of IC301...
  • Page 50 G. TROUBLESHOOTING OF PAL COLOUR IN THE PLAYBACK MODE. Is the signal from pin 7 of IC401 Check PREAMP circuit fed to pin 15 of IC301? Is the PAL colour signal from Check AMP circuit pin 7 of IC401 fed to pin 15 IC301 through AMP circuit? * The AMP circuit consists of Q305, R323, R324, R325...

  • Page 51: Waveforms On Video Circuit

    WAVEFORMS ON VIDEO CIRCUIT SECTION 5. 5-1. Waveforms in The EE Mode (Color bar input) 2 Pin 30 of IC301 3 Pin 38 of IC301 4 Pin 38 of IC301 1 Pin 30 of IC301 (PAL color bar input : (SECAM color bar output : (PAL color bar output : (SECAM color bar input :...
  • Page 52 5-3. Waveforms of the PAL Color in the Record Mode (Color bar input) e Pin 35 of IC301 r Pin 48 and 50 of IC301 t Pin 52 of IC301 (PAL color input : (300mVp-p) (400mVp-p) 1.0Vp-p) y Pin 37 of IC301 u Pin 14 of IC301 i Pin 10 of IC401 (C.SYNC : 2Vp-p)
  • Page 53 5-5. Waveforms of the PAL Color in the PB Mode (DP-1 test tape) ; UP : Pin 66 of IC301(color z Pin 37 of IC301 x Pin 48 and 50 of IC301 rotary : 0.5Vp-p) (Video out : 2.0Vp-p) (240mVp-p) DOWN : Pin 20 of IC301 (500mVp-p) c Pin 52 of IC301...

  • Page 54: Μ-Com Port

    µ-COM PORT SECTION 6. IC 501 (FOR U.K. & S/IRELAND:168KK8YKTS, FOR OTHERS:168KK8X8TS) * P : Pulse H : High L : Low NAME ASSIGNMENT ACTIVE IF ON (H) RF MODE ‘H’ OUTPUT OTHERWISE ‘L’ OUTPUT AUDIO MUTE(H) AUDIO MUTE H OUTPUT VIDEO D.
  • Page 55 NAME ASSIGNMENT ACTIVE TV/VCR MODE SWITCHING ON TV TV CONTROL TV MODE : L, VCR MODE : H A/V SW ACTIVE IN DIGITRON CANAL + (L) LOW INPUT IN CANAL BROADCAST A/V SW A/V INPUT SELECTOR OUTPUT A/V SW LM F LM R OUTPUT LOADING MOTOR FORWARD...
  • Page 56 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 57 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 13K AFT ANALOG DATA INPUT FOR AUTO FINE TUNING AFT ANALOG DATA INPUT FOR AUTO CH.

  • Page 58: Voltage Charts

    VOLTAGE CHARTS SECTION 7. Voltage Charts TDA9814T for IF IC (IC101) MODE MODE TWO CARRIER NICAM REMARKS TWO CARRIER NICAM REMARKS PIN NO. PIN NO. Conditions Conditions : EE MODE : EE MODE X : Variable LA71511M for VIDEO/AUDIO IC (DC:Voltage) (IC301) PIN NO.
  • Page 59 12BKK8W5ML for OSD IC DC(AC) : Volt LC89977M for CCD IC (IC001) (IC302) PIN NO. PIN NO. PIN NO. 0.00 0.00 1.99 2.47 2.60 2.60 2.62 2.62 5.00 5.01 5.04 5.05 2.63 2.64 2.00 2.43 2.59 2.59 0.00 0.00 2.03 2.39 0.00 0.01...
  • Page 60 BH7804K for Hi-Fi IC (IC251) KA8119B for AV SW. IC (IC601) PIN NO. PIN NO. PIN NO. PIN NO. 0.00 0.00 3.96 3.45 6.18 0.00 0.00 6.18 0.00 0.00 0.00 0.00 3.38 3.46 6.20 6.20 0.00 0.00 -4.82 -5.01 3.50 3.26 4.73 4.75...
  • Page 61 BA6209 for M/T DRIVE IC (IC502) 24LC08B for EEPROM IC (IC503) PIN NO PIN NO 0.84 0.84 5.26 5.26 12.3 12.5 4.71 4.71 12.3 12.5 4.71 4.71 0.86 0.86 K1A7033P for RESET IC (IC504) MC4558C for OPAMP IC (IC505) PIN NO PIN NO 5.28 5.28...
  • Page 62 AV SW PART TR EMITTER COLLECTOR BASE PORTS LOC. POWER OFF POWER OFF POWER OFF Q601 2.30 2.40 0.00 0.00 1.60 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...
  • Page 63 PIF PART TR (EE MODE) EMITTER COLLECTOR BASE PORTS LOC. TWO CARRIER NICAM TWO CARRIER NICAM TWO CARRIER NICAM Q171 Q172 Q173 Q174 Q175 Q176 Q177 Q178 Q179 Q180 * X : Variable POWER PART TR EMITTER COLLECTOR BASE PORTS LOC.

  • Page 64: Service Mode

    SERVICE MODE SECTION 8. 8-1. Service Mode ITEM REMARKS 1Press the [MENU] button to go to [MAIN MENU] MAIN MENU screen and press the number 484 in sequence then go to [SERVICE MODE] screen. Timer Program 2Display language is ENGLISH only. Timer Review VCR Setup 3Maintain the selected mode continuously.
  • Page 65 8-2. SVC Mode for Repair 1. ERROR CHECK MODE ITEM REMARKS 1Press the number 1 button, then OSD 1 is SVC MODE FOR REPAIR displayed in the initial SVC mode screen. DECK JIG CONNECTION MODE (OFF) EE MODE WITHOUT DECK MODE (OFF) ERROR CHECK MODE RETURN...
  • Page 66 2. DECK JIG CONNECTION MODE ITEM REMARKS 1Press the number 1 button, OFF ON is toggled in the SVC MODE FOR REPAIR screen. * The initial state is set to OFF mode. 3. EE MODE WITHOUT DECK ITEM REMARKS 1Press the number 2 button, OFF ON is toggled in the SVC MODE FOR REPAIR screen.
  • Page 67 8-4. Change of EEPROM Data ITEM REMARKS * CHANGE OF EEPROM DATA MODE is used for 0 0 1 1 1 0 1 change the VIDEO/AUDIO characteristic data. 1 1 1 1 1 1 1 0 A : AUTO 1 0 0 0 0 0 1 0 P : PAL 1 0 1 0 0 0 1 0 1Press the number 3 button, OSD 1 will be displayed...
  • Page 68 8-7. Hi-Fi check mode ITEM REMARKS 1Press the number 4 key, then OSD 1 is displayed in the initial SVC mode screen. Hi-Fi CHECK MODE 2Press the number 1 key in the 1 screen, then the auto adjust mode is executed for the Hi-Fi FM carrier. 1 AUTO ADJUST OK In the screen, blinking the “Check..”...
  • Page 69 ADDRESS 00 AUTO COLOR KILLER (NORMAL) 00 Y DELAY 160nS 00 LP 00 REC 0000 0001 10 FORCED KILLER 10 Y DELAY 80nS 10 EP 10 PB GROUP 1 01 FORCED COLOR 01 Y DELAY 0nS 01 SP/CARRIER SHIFT STOP 01 EE COMMON 11 PROHIBIT...
  • Page 70 8-11. Sanyo A/V 1chip Serial Data (PAL 4H’D) pal sp EE/REC/PB TRICK PLAY GROUP 1 0 0 0 1 1 1 GROUP 1 0 0 0 1 1 1 1 0 GROUP 2 1 1 1 1 1 1 1 0 GROUP 2 1 1 1 1 1 1 1 0 GROUP 3...

  • Page 71: Connection Diagram

    CIRCUIT DIAGRAM SECTION 9. 9-1. Connection Diagram CIRCUIT DIAGRAMS...

  • Page 72: Power Circuit Diagram

    9-2. Power Circuit Diagram R819 CIRCUIT DIAGRAMS...

  • Page 73: Syscon And Logic Circuit Diagram

    9-3. Syscon and Logic Circuit Diagram CIRCUIT DIAGRAMS...

  • Page 74: Av Sw Circuit Diagram

    9-4. AV SW Circuit Diagram CIRCUIT DIAGRAMS...

  • Page 75: If/Pdc Circuit Diagram(Tm)

    9-5. IF/PDC Circuit Diagram (TM) CIRCUIT DIAGRAMS...

  • Page 76: If Module Circuit Diagram(A2)

    9-6. If Module Circuit Diagram (A2) CIRCUIT DIAGRAMS...

  • Page 77: If Module Circuit Diagram(Nicam)

    9-7. If Module Circuit Diagram (Nicam) CIRCUIT DIAGRAMS...

  • Page 78: Hi-Fi/Pre-Amp Circuit Diagram

    9-8. Hi-Fi/Pre-Amp Circuit Diagram CIRCUIT DIAGRAMS...

  • Page 79: Video/Audio Circuit Diagram

    9-9. Video/Audio Circuit Diagram CIRCUIT DIAGRAMS...

  • Page 80: Remocon Circuit Diagram

    9-10. Remocon Circuit Diagram CIRCUIT DIAGRAMS...

  • Page 81: Pcb Main

    COMPONENTS LOCATION GUIDE ON PCB BOTTOM VIEW SECTION 10. 10-1. PCB Main P.C.B. LOCATION...

  • Page 82: Pcb Logic

    10-3. PCB Logic ƒ ƒ S S Series DV-K8K DV-K86 ƒ ƒ S S Series (DV-K82 ƒ ƒ S S Series) P.C.B. LOCATION...
  • Page 84 DISASSEMBLY SECTION 11. 11-1. Packing Ass’y DISASSEMBLY...
  • Page 85 11-2. Front Panel Assembly DV-K88 Series DV-K82 Series DV-K86 Series DV-K8K Series DIAGRAMS...
  • Page 87 11-3. Instrument Disassembly 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 DISASSEMBLY...

  • Page 88: Dv-K86

    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. 5) Remove the front panel. DV-K88 Series DV-K82 Series DV-K86 Series DV-K8K Series FIG. 2...
  • Page 89 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 DISASSEMBLY...
  • Page 90 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 DISASSEMBLY...

  • Page 91: Disassembly

    5. PCB LOGIC AS REMOVAL (FIG. 5) 2) Release two (2) tabs holding the PCB Logic AS. 3) Tilt PCB Logic AS forward to remove in the direction of arrow. DV-K88 Series DV-K82 Series DV-K86 Series DV-K8K Series FIG. 5...
  • Page 92 6. COVER PRE-AMP/DECK AS REMOVAL (FIG. 6) 1) Remove the top cover, bottom cover and front panel. 2) Remove five (5) screws. 3) Pull out the DECK AS and COVER PRE-AMP in the direction of arrow. FIG. 6 DISASSEMBLY...
  • Page 93 7. PCB MAIN AS REMOVAL (FIG. 7) 1) Remove two (2) screws. 2) Release three (3) tabs and lift out the main PCB in the direction of the arrow. FIG. 7 DISASSEMBLY...

  • Page 94: Electrical Parts List

    ELECTRICAL PARTS LIST SECTION 12. 12-1. Standard Parts Number Coding Resistor Coding 1. FIXED RESISTOR CODING TYPE OF RESISTOR RATED WATTAGE DISTANCE VALUE TOLERANCE Composition Resistor Code Distance EXAMPLE Code Wattage Symbol Tolerance Carbon Resistor 2.5 mm 1/6 W 0.47Ω ±...
  • Page 95 Capacitor Coding 1. NORMAL Value (Same as Fixed DISTANCE Distance TYPE (Same as Fixed Resistor) Resistor) (Same As Fixed Code Voltage CODE TPYE 6.3V Resistor) Aluminum Barrier Layer Ceramic Electrolytic Shape Line Across Mylar Characteristic Styrol Metalized Polyester Mica 100V 125V Tantal 160V...
  • Page 96 PCB Main AS PART CODE PART NAME PART DESCRIPTION 97PD183900 PCB MAIN AS DV-K884DY-AQ *B001B 97P0974800 PLATE EARTH TMI SUS304 CSP T0.2 C801 CL1UE3104M C LINE ACROSS AC275V 0.1MF M 1.40 WORLD C804 CH1CEE472M C CERA AC 2.5KV 4700PF M DE AC250V C805 CH1CFB101K C CERA AC...
  • Page 97 PART CODE PART NAME PART DESCRIPTION T201 560202L692 COIL OSC DEO-006 X301 5XE4R4336B CRYSTAL QUARTZ HC-49/U 4.433619MHZ 15PPM X502 5XZR03276G CRYSTAL QUARTZ SO-26 32.768000KHZ 10PPM 97PB227600 PCB MAIN CHIP AS DV-K884DY-AQ C001 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 C003 HCQK240JCA C CHIP CERA...
  • Page 98 PART CODE PART NAME PART DESCRIPTION C314 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 C319 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 C323 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF Z 2012 C328 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 C329 HCFK104ZCA...
  • Page 99 PART CODE PART NAME PART DESCRIPTION C820 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 C821 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 C824 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 IC251 1BH7804K-- IC HIFI BH7804K IC301 1LA71511M-...
  • Page 100 PART CODE PART NAME PART DESCRIPTION R182 HRFT103JCA R CHIP 1/10 10K OHM J 2012 R184 HRFT303JCA R CHIP 1/10 30K OHM J 2012 R185 HRFT103JCA R CHIP 1/10 10K OHM J 2012 R186 HRFT183JCA R CHIP 1/10 18K OHM J 2012 R190 HRFT563JCA R CHIP...
  • Page 101 PART CODE PART NAME PART DESCRIPTION R504 HRT511JCA R CHIP 1/10 510 OHM J 2012 R505 HRFT511JCA R CHIP 1/10 510 OHM J 2012 R506 HRT304JCA R CHIP 1/10 300K OHM J 2012 R510 HRFT331JCA R CHIP 1/10 330 OHM J 2012 R511 HRFT331JCA R CHIP...
  • Page 102 PART CODE PART NAME PART DESCRIPTION R631 HRFT561JCA R CHIP 1/10 560 OHM J 2012 R632 HRFT561JCA R CHIP 1/10 560 OHM J 2012 R633 HRFT561JCA R CHIP 1/10 560 OHM J 2012 R634 HRFT561JCA R CHIP 1/10 560 OHM J 2012 R635 HRFT561JCA R CHIP...
  • Page 103 PART CODE PART NAME PART DESCRIPTION C255 CMXM2A472J C MYLAR 100V 4700PF J (TP) C256 CEXF1A101A C ELECTRO 10V RSM 100MF 6.3X7 C257 CEXF1A101A C ELECTRO 10V RSM 100MF 6.3X7 C258 CMXM2A472J C MYLAR 100V 4700PF J (TP) C260 CMXM2A223J C MYLAR 100V 0.022MF J TP C261...
  • Page 104 PART CODE PART NAME PART DESCRIPTION C620 CEXF1A471V C ELECTRO 10V RSS 470MF 8X11.5 C625 CEXF1E220A C ELECTRO 25V RSM 22MF 6.3X7 C626 CEXF1E220A C ELECTRO 25V RSM 22MF 6.3X7 C627 CEXF1E220A C ELECTRO 25V RSM 22MF 6.3X7 C628 CEXF1E220A C ELECTRO 25V RSM 22MF 6.3X7 C629...
  • Page 105 PART CODE PART NAME PART DESCRIPTION Q178 TZSR1001-- KSR1001 (AUTO) Q179 TZTA1273Y- KTA1273Y(966Y) Q180 TZSR1001-- KSR1001 (AUTO) Q181 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) Q201 TZTC3202Y- KTC3202Y (AUTO)(1959Y) Q202 TZTA1266Y- KTA1266Y- (AUTO)(1015Y) Q203 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) Q204 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) Q205 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) Q251 TZTA1266Y- KTA1266Y- (AUTO)(1015Y)
  • Page 106 PART CODE PART NAME PART DESCRIPTION C321 CCZF1H104Z C CERA HIKF 50V 0.1MF Z AXIAL C334 CBZP1C103M C CERA SEMI 16V Y5S 0.01MF M (AXIAL) C340 CCZF1H104Z C CERA HIKF 50V 0.1MF Z AXIAL C341 CBZP1C103M C CERA SEMI 16V Y5S 0.01MF M (AXIAL) C342 CBZP1C103M C CERA SEMI...
  • Page 107 PART CODE PART NAME PART DESCRIPTION D618 DZZ5R6BM-- DIODE ZENER DZ 5.6BM (AUTO) D619 DZZ5R6BM-- DIODE ZENER DZ 5.6BM (AUTO) D620 DZZ5R6BM-- DIODE ZENER DZ 5.6BM (AUTO) D621 DZZ5R6BM-- DIODE ZENER DZ 5.6BM (AUTO) D622 DZZ5R6BM-- DIODE ZENER DZ 5.6BM (AUTO) D623 DZZ5R6BM-- DIODE ZENER...
  • Page 108 PART CODE PART NAME PART DESCRIPTION JP023 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP024 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP025 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP026 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP027 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP028...
  • Page 109 PART CODE PART NAME PART DESCRIPTION JP074 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP075 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP076 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP077 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP078 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP079...
  • Page 110 PART CODE PART NAME PART DESCRIPTION JP124 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP125 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP126 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP127 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP128 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP129...
  • Page 111 PART CODE PART NAME PART DESCRIPTION JP173 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP174 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP175 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP176 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP177 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP178...
  • Page 112 PART CODE PART NAME PART DESCRIPTION JP222 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP223 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP224 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP225 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP226 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP227...
  • Page 113 PART CODE PART NAME PART DESCRIPTION JP274 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP275 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP276 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP277 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP278 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP279...
  • Page 114 PART CODE PART NAME PART DESCRIPTION R267 RD-AZ561J- R CARBON FILM 1/6 560 OHM J R268 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R269 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R272 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R273 RD-AZ101J- R CARBON FILM...
  • Page 115 PART CODE PART NAME PART DESCRIPTION R558 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R559 RD-AZ362J- R CARBON FILM 1/6 3.6K OHM J R560 RD-AZ473J- R CARBON FILM 1/6 47K OHM J R561 RD-AZ331J- R CARBON FILM 1/6 330 OHM J R562 RD-AZ331J- R CARBON FILM...
  • Page 116 Table of Difference Part List Main As 1. FOR EMC & MICOM PART-CODE FOR OTHERS FOR U.K. & S/IRELAND B001B 97P7608300 DELETE IC501 S/N : 168KK8X8TS S/N : 168KK8YKTS 2. FOR A/V JACK & C807 PART-CODE FOR OTHERS FOR AUSTRALIA & M.EAST JK601 97P6313300 DELETE...
  • Page 117 PCB Logic AS PART CODE PART NAME PART DESCRIPTION 97PD184200 PCB LOGIC SW AS DV-K884DY-AQ G701 DSVV6SS25- DIGITRON (V.F.D) SVV-6SS25 H701 1GP3U771R- IC UNIT R/RECEIVER GP3U771R JK701 97P6311300 JACK PIN DSP-9407A JK71A 97P0973700 PLATE EARTH AV SUS304 CSP T0.15 M701 97P2340500 HOLDER DIGITRON P701...
  • Page 118 PART CODE PART NAME PART DESCRIPTION JP717 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP718 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP720 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP721 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP722 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP723...
  • Page 119 PCB IF Module as(A2) PART CODE PART NAME PART DESCRIPTION 97PD184200 PCB IF MODULE AS(A2) DV-K884DY-AQ IC121 1TDA9845-- IC RF TDA9845 L101 56B215K694 COIL PIF KTRF-7780B P101 97P62M05A9 CONN B/B 35238 RECEP 2.5MM 9P P102 97P62M05A9 CONN B/B 35238 RECEP 2.5MM 9P X121 5XE10R000C CRYSTAL QUARTZ...
  • Page 120 PART CODE PART NAME PART DESCRIPTION C116 CEXF1E470V C ELECTRO 25V RSS 47MF (5X11) TP C121 CEXF1E470V C ELECTRO 25V RSS 47MF (5X11) TP C123 CMXM2A104J C MYLAR 100V 0.1MF J (TP) C124 CMXM2A182J C MYLAR 100V 1800PF J (TP) C126 CEXF1H229V C ELECTRO...
  • Page 121 table of difference part list if module(a2) pcb 1. FOR PAL-BG/DK SYSTEM PART-CODE FOR PAL-B/G FOR PAL-BG/DK Z107 5PCB6R500A DELETE PCB IF Module as (Nicam) PART CODE PART NAME PART DESCRIPTION 97PD186100 PCB IF AS (NICAM) DV-K884DY-AQ/I IC102 1SAA7283ZP IC RF SAA7283ZP (NICAM) L101 56B215K694...
  • Page 122 PART CODE PART NAME PART DESCRIPTION C148 HCBK223KCA C CHIP CERA 50V X7R 0.022MF K 2012 C149 HCLK100DCA C CHIP CERA 50V SL 10PF D 2012 C150 HCQK101JCA C CHIP CERA 50V CH 100PF J 2012 C151 HCQK101JCA C CHIP CERA 50V CH 100PF J 2012 C152 HCFK104ZCA...
  • Page 123 PART CODE PART NAME PART DESCRIPTION Q102 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) R191 RV5426203M R SEMI FIXED H20K-5X3-6Y-PC-MS 97PA491500 PCB IF A-AUTO(NICAM) DV-K884DY-AQ/I D101 DZN4148--- DIODE 1N4148 AUTO 52MM D102 DZBB405--- DIODE VARACTOR BB405 JP001 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP002 85801065GY WIRE COPPER...
  • Page 124 PCB Pre Amp as PART CODE PART NAME PART DESCRIPTION 97PD184300 PCB PRE AMP AS DV-K884DY-AQ IC401 1LA70011-- IC PREAMP LA70011 (4HD) M401 97PB227500 CASE PRE AMP AS DV-K884DY-AQ M401A 97P0470300 COVER SHI PREAMP ET T0.3 M401B 97P0470200 CASE SHI PREAMP ET T0.4 P401 97P62G01BF...
  • Page 125 PART CODE PART NAME PART DESCRIPTION JP401 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP402 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP403 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP410 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP411 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP412...
  • Page 126 PCB Power Smps As PART CODE PART NAME PART DESCRIPTION 97PD184000 PCB POWER SMPS AS DV-K884DY-AQ 2193102005 SOLDER BAR SN:PB=63:47 S63S-1320 2193011100 SOLDER WIRE 60 SNA 1.2D 2291050615 FLUX SOLDER KS-892M-1 2291050312 FLUX SOLVENT S-3000D 97P0465700 COVER SHI SMPS ET T=0.5 97P0970501 PLATE SHI SMPS ET T=0.5...
  • Page 127 PART CODE PART NAME PART DESCRIPTION CEXF1J220D C ELECTRO 63V RZ 22MF 6.3X11.5 TP CEXF1H220V C ELECTRO 50V RSS 22MF (5X11) TP IC21 1KA431AZ-- IC REGULATOR KA431AZ 97PA490600 PCB POWER A-AUTO AS DV-K884DY-AQ DZ12 DZZ6R8BM-- DIODE ZENER UZ-6.8BM AUTO DZEU01Z--- DIODE EU01Z JP01...

  • Page 128: Service Jig Connection Methods

    SERVICE JIG CONNECTION METHODS SECTION 13. The Service Fixture 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 Connecting Cable 97PB400300 Path Adj Fixture Use for X-position adjust Tape path alignment...
  • Page 129 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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Dv0k86 seriesDv-k82 seriesDv-k8k series

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