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JVC HR-J4020UA Service Manual
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JVC HR-J4020UA Service Manual

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SERVICE MANUAL
VIDEO CASSETTE RECORDER
7
YD007
2004
HR-J4020UA, HR-J4020UB,
HR-J7020UA, HR-J7020UM
For disassembling and assembling of MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700(MECHANISM ASSEMBLY).
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
HR-J4020UA, HR-J4020UB,
HR-J7020UA, HR-J7020UM [V17C1, V17D0]

TABLE OF CONTENTS

COPYRIGHT © 2004 Victor Company of Japan, Limited
(UA model)
(UB, UM model)
(UA model)
(UB, UM model)
(HR-J7020UA, HR-J7020UM)
No.YD007
2004/7

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Summary of Contents for JVC HR-J4020UA

  • Page 1: Table Of Contents

    SERVICE MANUAL VIDEO CASSETTE RECORDER YD007 2004 HR-J4020UA, HR-J4020UB, HR-J7020UA, HR-J7020UM (UA model) (UB, UM model) (UA model) (UB, UM model) HR-J4020UA, HR-J4020UB, HR-J7020UA, HR-J7020UM [V17C1, V17D0] (HR-J7020UA, HR-J7020UM) For disassembling and assembling of MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700(MECHANISM ASSEMBLY).
  • Page 2 SPECIFICATION HR-J4020UA HR-J7020UA HR-J4020UB HR-J7020UM GENERAL Power requirement AC 110 V - 220 V, 50 Hz/60 Hz Power consumption Power on 14 W Power off 3.1 W Temperature Operating 5°C to 40°C Storage -20°C to 60°C Operating position Horizontal only Dimensions (W ×...

  • Page 3: Precaution

    SECTION 1 PRECAUTION SAFTY PRECAUTIONS Prior to shipment from the factory, JVC products are strictly in- quently, when servicing these products, replace the cathode spected to conform with the recognized product safety and elec- ray tubes and other parts with only the specified parts. Under trical codes of the countries in which they are to be no circumstances attempt to modify these circuits.Unautho-...
  • Page 4 1.1.2 Safety Check after Servicing Examine the area surrounding the repaired location for damage (4) Leakage current test or deterioration. Observe that screws, parts and wires have been Confirm specified or lower leakage current between earth returned to original positions, Afterwards, perform the following ground/power cord plug prongs and externally exposed ac- tests and confirm the specified values in order to verify compli- cessible parts (RF terminals, antenna terminals, video and...

  • Page 5: Specific Service Instructions

    SECTION 2 SPECIFIC SERVICE INSTRUCTIONS Different table of features The following table indicates main different points between models HR-J4020UA, HR-J7020UA, HR-J4020UB and HR-J7020UM. HR-J4020UA HR-J7020UA HR-J4020UB HR-J7020UM ← POWER PLUG IRAM BRAZIL PLUG SASO HiFi HEAD NOT USED USED NOT USED...
  • Page 6 Mechanism service mode This model has a unique function to enter the mechanism into ev- ery operation mode without loading of any cassette tape. This function is called the "Mechanism service mode". Main board assembly 2.4.1 How to set the "Mechanism service mode" (1) Set the VCR to the Jig RCU mode (the mode in which codes from the Jig RCU can be received).
  • Page 7 2.5.2 Lubrication With no need for periodical lubrication, you have only to lubricate new parts after replacement. If any oil or grease on contact parts is soiled, wipe it off and newly lubricate the parts. Note: • See the "mechanism assembly" diagram of the "parts list"...

  • Page 8: Disassembly

    SECTION 3 DISASSEMBLY 3.1 Removing the major parts 3.1.1 How to read the procedure table This table shows the steps for disassembly of the externally fur- nished parts and board assemblies. Reverse these steps when Door re-assembling them. opener Step/ Fig.
  • Page 9 (S1a) [1]Top cover (S1a) (S1a) (S3a) <Note 3b> [3]Drum assembly <Note 3c> (S1a) [3]Mechanism assembly (S3a) <Note 3b> (S3a) (S1a) <Note 3b> "A" (S3e) <Note 3c> NOTE)Bend The SHIELD CASE (S3c) 1. Insert direction of FFC WIRE as follows. <Note 3c> of the MAIN BOAD ASSY right side back side...

  • Page 10: Adjustment

    SECTION 4 ADJUSTMENT Before adjustment 4.1.1 Precaution 4.1.4 Color (colour) bar signal,Color (colour) bar pattern • The adjustments of this unit include the mechanism com- Color(colour) bar signal [NTSC] Color(colour) bar pattern [NTSC] patibility and electrical adjustments. During the perfor- White(100%) (75%) mance of this work, be sure to observe the precautions for...
  • Page 11 4.2 Mechanism compatibility adjustment Note: 4.2.2 FM waveform linearity • Although compatibility adjustment is very important, it Signal (A1) • Alignment tape(SP, stairstep, PAL) [MHPE] is not necessary to perform this as part of the normal (A2) • Alignment tape(LP, stairstep, PAL) [MHPE-L] (UA Model) servicing work.
  • Page 12 4.2.4 A/C head phase (X-value) Proper waveform variation Signal (A1) • Alignment tape(SP, stairstep, PAL) [MHPE] (A2) • Alignment tape(LP, stairstep, PAL) [MHPE-L] (UA Model) (A1) • Alignment tape(SP, stairstep, PAL) [MHP] (A2) • Alignment tape(EP, stairstep, PAL) [MHP-L] (UB, UM Model) Improper waveform variation Mode •...
  • Page 13 4.3 Electrical adjustment Note: 4.3.1.2 Slow tracking preset The following adjustment procedures are not only neces- Signal (A1) • Ext. input sary after replacement of consumable mechanical parts (A2) • Color (colour) bar signal [NTSC] (A3) • Color (colour) bar signal [PAL-N] or board assemblies, but are also provided as references (UA Model) to be referred to when servicing the electrical circuitry.

  • Page 14: Troubleshooting

    SECTION 5 TROUBLESHOOTING Manually removing the cassette tape (3) Unload the pole base assembly by manually turning the gear of the loading motor until the pole base assembly is If you cannot remove the cassette tape which is loaded because hidden behind the cassette lid.
  • Page 15 5.2 Emergency display function This unit saves details of the last two emergencies as the EMG E : ∗∗ : ∗∗ history and allows the status of the VCR and the mechanism of *1 : *2 : 34 each emergency to be shown both on the display and as OSD in- *5 : *6 : *7 formation.
  • Page 16 FF : Sensor information (See sensor information details.) (See Mechanism mode sequence.) GG : Capstan motor speed Remote pause HH : Key code (JVC code) : Supply reel winding diameter data, higher 8 bits. End sensor JJ : Supply reel winding diameter data, lower 8 bits.
  • Page 17 5.2.4 EMG content description Note: EMG contents "E08/E09" are for the model with Dynamic Drum (DD). CONTENT CAUSE If the mechanism mode does not change to the next mode within 4 sec- E01: Loading EMG 1. The mechanism is locked in the middle of the mode transition during a tape loading operation. onds after the loading motor starts rotating in the loading direction, while 2.
  • Page 18 5.2.5 EMG detail information < 1 > *2 : Mechanism operation mode The status (electrical operation mode) of the VCR and the status [Table of MN*] (mechanism operation mode/sensor information) of the mecha- Display Mechanism operation mode nism in the latest EMG can be confirmed based on the figure in Command standby (No command to be executed) EMG detail information <...
  • Page 19 3- : Mechanism sensor information *5 : Cassette tape type < 1 > [Common table of MN* and HD*] Display Cassette tape type <1> Cassette type not identified Mechanism sensor information Large reel/small reel (T-0 to T-15/T-130 to T-210) not classified Display Mechansim Small reel, thick tape (T-120) identified/thin tape (T-140) identified...
  • Page 20 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY DIGITAL VIDEO STORAGE CATEGORY 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefecture, 221-8528, Japan (No.YD007) Printed in Japan...
  • Page 21 SCHEMATIC DIAGRAMS VIDEO CASSETTE RECORDER HR-J4020UA, HR-J4020UB, HR-J7020UA, HR-J7020UM CD-ROM No.SML200407 (UA model) (UB, UM model) (UA model) (UB, UM model) HR-J4020UA, HR-J4020UB, HR-J7020UA, HR-J7020UM [V17C1, V17D0] (HR-J7020UA, HR-J7020UM) For disassembling and assembling of MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700(MECHANISM ASSEMBLY).
  • Page 23 CIRCUIT BOARD NOTES CHARTS AND DIAGRAMS 1. Foil and Component sides 4. Voltage measurement NOTES OF SCHEMATIC DIAGRAM 1) Foil side (B side) : Parts on the foil side seen from foil face (pattern face) 1) Regulator (DC/DC CONV) circuits Safety precautions are indicated.
  • Page 24 BOARD INTERCONNECTIONS LED Page 2-17 Sheet 7 VIDEO/N.AUDIO Page 2-5 Sheet 1 FMA/DEMOD Page 2-7 Sheet 2 SYSCON Page 2-9 Sheet 3, 4 SW.REG Page 2-13 Sheet 5 TUNER Page 1-15 Sheet 6 FRONT Page 2-17 Sheet 7 TERMINAL Page 2-19 Sheet 8 p10615001a_rev0...
  • Page 25 MAIN(VIDEO/N.AUDIO) SCHEMATIC DIAGRAM A.IN2[R] A.IN2[L] A.IN1[R] MESECAM_DET TO TERMINAL A.IN1[L] LP/EP_SHORT[H] SHEET 8 F.AUDIO[R] SP_SHORT[H] TO SYSCON F.AUDIO[L] VIDEO_ENV LINE_OUT[L] D.FF SHEET 3 LINE_OUT[R] TP111 A.MUTE[H] D.FF I2C_DATA_A/V 150p I2C_CLK_A/V LINE_OUT[R] B2001 LINE_OUT[L] 2Fsc 2SA1576A/QR/ NA_PB TO FMA/DEMOD NA_REC SHEET 2 0.01 RF_AUDIO 2.2k...
  • Page 26 MAIN(FMA/DEMOD) SCHEMATIC DIAGRAM [HiFi MODEL ONLY] L2202 C2222 SHORT 0.01 B2202 B2203 TO SW.REG SW12V C2233 C2232 SHEET 5 OPEN OPEN C6504 R6502 3.3k C2209 C6517 0.22 C2227 Q2201 DTA144WUA B6601 R2220 TP2253 A.PB.FM C6602 Q2202 C6508 0.022 C2208 0.015 DTC144WUA R2253 R2257...
  • Page 27 MAIN(SYSCON) SCHEMATIC DIAGRAM NMFZ012-1R0X-M CP3002 CN3001 CP3001 OPEN C.FG_I CAP.M_Vcc Vcc5V C3056 C3071 C3072 CAP.M_F/R OPEN R3252 R3253 LM_VCTL OPEN M_GND C4031 TO CAP_MDA CP4001 M12V L4001 S_GND OPEN OPEN M12/17/26V_CAP Vcc12 QQL231J-1R0Y TO SW.REG AL5.8V_SYS CAP.M_CTL POWER_DET LM_F/R/S C4001 SHEET 5 CP4002 SW12V...
  • Page 28 REMOTE CONTROLLER SCHEMATIC DIAGRAM (LP20878-001#, 020#) Key No. Key Name TV POWER STOP DISPLAY TV/CH SKIP SEARCH PROG PROG CHECK SP/EP PLAY TV/CH 0/AUX 8/DAILY(M-F) 4/START TIMER A.MONITOR CANCEL/C.RESET KI/04 POWER 5/STOP 2/STOP TV/VCR PAUSE MENU 6/DATE OK/ENTER/OSD 3/DATE TV/INPUT 1/START 9/WEEKLY FDP GRID ASSIGNMENT AND ANODE CONNECTION...
  • Page 29 MAIN(SW.REG) SCHEMATIC DIAGRAM D5214 L5303 µ TO SYSCON 1SS133 POWER_DET 1SS270A T5001 B5304 SHEET 3 QQS0265-001 D5201 QQS0187-001 ERA18-02 R5302 R5303 1SR153-400 1.2k B5301 Q5310 10ERB20 TO TUNER PG104RS 2SC5739/QP/ D5001 SHEET 6 CN5001 S1WB/A/60-4102 Q5309 F5001 C5001 S1WB/A/60-X DTA114EUA /250 0.047 S1WB( A) 60F4072X...
  • Page 30 MAIN(TUNER) SCHEMATIC DIAGRAM TU6001 BB( RF5V) NC( GND) AUDIO_IN MOD_SDA CH_SW L6002 MOD_B( RF5V) RF5V TO SW.REG SW5V SHEET 5 MOD_SCL CONV_CTL SW12V VIDEO_IN L6501 µ NC( GND) ( AGC) C6058 C6057 0.01 ( BT) R6715 R6713 DEMOD[L] TO FMA/DEMOD SHEET 2 DEMOD[R] C6718...
  • Page 31 MAIN(FRONT) SCHEMATIC DIAGRAM AL5V Q7001 DIG1 DIG2 Q7002 DIG3 DTA144WKA-X DI7001 DI7001 DIG4 Q7003 DIG5 DTA144WKA-X Q7004 DTA144WKA-X TO SYSCON Q7005 SHEET 3 DTA144WKA-X DTA144WKA-X R7001 B7011 R7020 R7030 R7040 KEY1 R7002 KEY2 R7003 CTL5 R7004 R7005 R7006 C7011 R7007 /6.3 Q7006 Q7007...
  • Page 32 MAIN(TERMINAL) SCHEMATIC DIAGRAM R7105 R7114 R7112 C7170 R7113 R7107 C7183 R7116 C7171 L7101 C7182 L7102 J7103 J7103 J7103 J7103 J7103 J7103 J7103 J7103 J7102 J7101 R7121 R7122 C7101 C7109 L7113 C7110 R7123 C7191 C7119 L7114 C7102 C7192 C7120 C7103 C7104 R7110 R7119 R7151...
  • Page 33 DANGEROUS VOLTAGE MAIN CIRCUIT BOARD <03> MAIN C7110 J7103 B7103 LPB10234-001E C7183 C7182 TU6001 R7105 C7171 C7101 D7107 C7128 C7170 C7122 C7120 IC7102 L7104 IC7103 R7112 C6056 R7107 C7169 R7121 J7102 C7102 J7101 C6053 R7117 R7119 C7184 C7111 C7129 C7166 C7119 B7102 L7101...
  • Page 34 VOLTAGE CHARTS COMPONENT PARTS LOCATION GUIDE <MAIN> LPB10234-001E REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION <MAIN> CAPACITOR C2201 A D 16M C5303 C7191 B C 20O L7102 A D 16O R301 R3063 B C 10E...
  • Page 35 WAVEFORMS CPU PIN FUNCTION <SYSCON IC3001> PIN NO. LABEL IN/OUT FUNCTION PIN NO. LABEL IN/OUT FUNCTION SP_FG DETECTION SIGNAL FOR SUPPLY REEL ROTATION/TAPE REMAIN CTL_GAIN CONTROL AMP OUT FREQUENCY RESPONSE SWITCHING <VIDEO/N.AUDIO> TU_FG DETECTION SIGNAL FOR TAKE-UP REEL ROTATION/TAPE REMAIN 4:3[L] ASPECT SELECT P50_IN...
  • Page 36 VIDEO/N.AUDIO BLOCK DIAGRAM MAIN (VIDEO/N. AUDIO, TERMINAL) SYSCON I2C_DATA_AV I2C_CLK_AV VPS/PDC 2Fsc SLICER ( VIDEO & AUDIO TP106 SIGNAL PROCESSOR ) PB. FM TP111 D. FF SYSCON D. FF USED USED KILLER CLK DATA D.FF X-TAL DOWN LCVCO CR DET CLOCK DRIVER CONV VCO/OSC...
  • Page 37 AUDIO BLOCK DIAGRAM MAIN ( VIDEO/N. AUDIO , FMA, TERMINAL, TUNER ) IC2201 J7105 FRONT EXT2_IN(R) AUDIO IN ( R ) U.DRUM AUDIO HEAD EXT2_IN(L) FMA CH1 AUDIO IN ( L ) FMA CH2 RFC_OUT TU6001 TP2253 ANT IN AUDIO IN 27 A.PB.FM DACM_L TV_IN(L)
  • Page 38 SYSTEM CONTROL BLOCK DIAGRAM MAIN ( SYSCON ) IC3001 ( SYSTEM CONTROL MICRO PROCESSOR ) X_OUT X3001 MAIN SYSTEM CLOCK (14MHz) X_IN XC_OUT X3002 TIMER CLOCK (32kHz) CAP MDA/DRUM CN3001 XC_IN CAP.M FG C.FG_IN MOTOR CAP.M F/R CAP.M_F/R CAP.M VCTL S3001 SAFETY CAP_CTL_V...
  • Page 40 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY VIDEO DISPLAY CATEGORY 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefecture, 221-8528, Japan (No.YD007) Printed in Japan...
  • Page 41 * BEWARE OF BOGUS PARTS Parts that do not meet specifications may cause trouble in regard to safety and performance. We recommend that genuine JVC parts be used. * (x_) in a description column shows the number of the used part.
  • Page 42 Exploded view of general assembly and parts list Block No.M1MM MECHANISM ASSY<M2> MAIN BOARD ASSY<03> 501A 501B 3-2(No.YD007)
  • Page 43 MODEL MARK MODEL MARK HR-J4020UA HR-J7020UA HR-J4020UB HR-J7020UM General assembly Block No. [M][1][M][M]  Symbol No. Part No. Part Name Description Local  501 LP10539-006D FRONT PANEL ASSY  501 LP10539-007D FRONT PANEL ASSY  501 LP10539-005D FRONT PANEL ASSY ...
  • Page 44 VHS mechanism assembly and parts list Block No.M2MM Not used A/C HEAD BOARD ASSY <12> LOADING MOTOR BOARD ASSY <55> PMD0048A-C Classification Part No. Symbol in drawing NOTE:The section marked in AA and BB Grease KYODO-SH-JB indicate lubrication and greasing areas. COSMO-HV56 3-4(No.YD007)
  • Page 45 MODEL MARK MODEL MARK HR-J4020UA HR-J7020UA HR-J4020UB HR-J7020UM VHS mechanism Block No. [M][2][M][M]  Symbol No. Part No. Part Name Description Local LP21039-003A MAIN DECK ASSY LP40097-002E GUIDE POLE CAP NAH0004-001 FULL ERASE HEAD LP30958-001B LOADING GEAR BASE QYTPST2620ZA TAP SCREW M2.6 x 20mm(x2)
  • Page 46 MODEL MARK MODEL MARK HR-J4020UA HR-J7020UA HR-J4020UB HR-J7020UM  Symbol No. Part No. Part Name Description Local LP40846-001C LIMIT SPRING LP31100-002A DRIVE LEVER LP30978-001B DRIVE ARM(L) LP30979-001S DRIVE ARM(R) LP40847-001B TORSION SPRING LP30980-002A CONNECT PLATE LP10403-001C SIDE HOLDER(L) LP10404-001E SIDE HOLDER(R)
  • Page 47 MODEL MARK MODEL MARK HR-J4020UA HR-J7020UA HR-J4020UB HR-J7020UM Electrical parts list Main board  Symbol No. Part No. Part Name Description Local Block No. [0][3] Q2202 or RN1309-X DIGI TRANSISTOR  Symbol No. Part No. Part Name Description Local Q2203...
  • Page 48 MODEL MARK MODEL MARK HR-J4020UA HR-J7020UA HR-J4020UB HR-J7020UM  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local Q7012 or UN2216-X DIGI TRANSISTOR NCB31CK-104X C CAPACITOR 0.1uF 16V K Q7104 2SA1576A/QR/-X TRANSISTOR...
  • Page 49 MODEL MARK MODEL MARK HR-J4020UA HR-J7020UA HR-J4020UB HR-J7020UM  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C2054 NCB31EK-223X C CAPACITOR 0.022uF 25V K C6055 NDC31HJ-680X C CAPACITOR 68pF 50V J...
  • Page 50 MODEL MARK MODEL MARK HR-J4020UA HR-J7020UA HR-J4020UB HR-J7020UM  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R2206 NRSA63J-682X MG RESISTOR 6.8kΩ 1/16W J R5109 NRSA63J-681X MG RESISTOR 680Ω 1/16W J...
  • Page 51 MODEL MARK MODEL MARK HR-J4020UA HR-J7020UA HR-J4020UB HR-J7020UM A/C head board  Symbol No. Part No. Part Name Description Local Block No. [1][2] B6001 NRSA63J-0R0X MG RESISTOR 0Ω 1/16W J B6002 NRSA63J-0R0X MG RESISTOR 0Ω 1/16W J  Symbol No.
  • Page 52 Packing materials and accessories parts list The instruction manual to be provided with this product will differ according to the destination. Block No.M3MM ADHESIVE TAPE 306A FINAL ASSY <M1> FRONT SIDE SPEC OF BARCODE 3-12(No.YD007)
  • Page 53 MODEL MARK MODEL MARK HR-J4020UA HR-J7020UA HR-J4020UB HR-J7020UM Packing and accessories Block No. [M][3][M][M]  Symbol No. Part No. Part Name Description Local LP31393-005B PACKING CASE LP31393-004A PACKING CASE LP31393-003B PACKING CASE LP31385-001B CUSHION ASSY LP41038-002A POLY BAG LP21138-001C REMOCON...

This manual is also suitable for:

Hr-j7020uaHr-j4020ubHr-j7020um