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Panasonic PV-4601 A Service Manual

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ORDER NO. MKS9512M303
B3
Video Cassette Recorder
PV-4601 A
PV-4601 B
PV-4601-K
PV-4651
PV-4651-K
SPECIFICATIONS
1

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  Summary of Contents for Panasonic PV-4601 A

  • Page 1 ORDER NO. MKS9512M303 Video Cassette Recorder PV-4601 A PV-4601 B PV-4601-K PV-4651 PV-4651-K SPECIFICATIONS...
  • Page 2: Specifications

    ITEM SPECIFICATIONS Power Source: 120 V AC ±10%, 60Hz ±0.5% Consumption: Approx. 18 watts (Power on), Approx. 6 watts (Power off) Approx. 23 watts (Power on), Approx. 7 watts (Power off) Video Head: 4 rotary heads helical scanning system Input Level: VIDEO IN Jack (Phono type) 1.0 Vp-p 75Ω Ω Ω Ω unbalanced Output Level: VIDEO OUT Jack (Phono type) 1.0 Vp-p 75Ω...
  • Page 3 Weight Approx. 7.9 lbs. (3.6 kg) Approx. 8.2 lbs. (3.7 kg) Use The Marks(A,B,...)shown in the chart bellow to distinguish the different moddels included in this Service Manual. MODEL MARK PV-4601 A PV-4601 B PV-4601 -K PV-4651 PV-4651-K NOT USED...
  • Page 4: Safety Precautions

    IMPORTANT SAFETY NOTICE There are special components used in this equipment which are important for safety. These parts are marked by /triangle =up triangle, open]in the Schematic Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that these critical parts should be replaced with manufacturer's specified parts to prevent shock, fire or other hazards.
  • Page 5: Leakage Current Hot Check

    2. Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part on the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the chassis, the reading should be between 1M ohm and 5.2M ohm. When the exposed metal does not have a return path to the chassis, the reading must be ∞...
  • Page 6 DEVICES Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor "chip" components. The following techniques should be used to help reduce the incidence of component damage caused by electro static discharge (ESD).
  • Page 7 Model : D, E Equipped with dbx ® -TV Noise Reduction for true MTS reproduction. dbx ® -TV Noise Reduction is required for good stereo separation and audio fidelity. 3. SUMMARY 3.1. BASIC OPERATIONS 3.2. HELPFUL SERVICE NOTES AND CAUTIONS (Please read) 3.2.1.
  • Page 8 Fig. 1-2 Fig. 1-3 Explanation of Codes Code No. S-Tab SW Data - S-Tab SW is off. - S-Tab SW is on. Take Up and Supply Photo Sensor Data - No light detected at either sensor. - Take Up Photo Sensor detected at beginning of tape.
  • Page 9 Explanation of Codes Code No. Tape Loading (direction) Tape Unloading (direction) Fig. 1-4 3. While pressing down FF button on VCR with power turned off, press any operation button on either VCR, or remote to detect that a key has been pressed. 1st digit changes to "0"...
  • Page 10 Fig. 1-5 Note: When 1 to 4 listed in Lock code occurs, the VCR goes into VCR shut-off condition. VCR stops and all VCR function buttons except for power become non-operational. 3.2.2. Service Position 1. Service Position (1) Service Position (1) is used for checking and replacing Mechanical and Electrical parts.
  • Page 11 Fig. 2-1 Note: 1. When placing the unit into the Service Position (1), Beats may be seen in the picture. However, when the Red Screw between the Main C.B.A. and the Power Supply AssÕy is tightened, the Beats in the picture will be eliminated. So, place a short ground jumper wire between the Power Supply AssÕy and the Main C.B.A.
  • Page 12 Cassette Tape firmly into the Cassette Up Ass'y with your left thumb. 4. To install the Power Supply Ass'y to the Main C.B.A.: Connect connector P1001 and hook the tab of the Shield Case to the slot of the Main C.B.A. as shown in Fig.
  • Page 13 In this position, check the movement of mechanical parts on the Mechanism Chassis and replace parts as needed. In this position, checking is limited on the electronic circuit of the Main C.B.A. from the component side. To position the VCR Unit for servicing as shown in Fig.
  • Page 14 Fig. 2-3...
  • Page 15 3.2.3. How to reset all VCR Memory functions To reset (clear) the select language, channel auto set and set clock functions to their initial power on condition (power on, no cassette inserted), hold down the PLAY and REWIND buttons together on VCR for more than 5 seconds. Power will shut off . 3.2.4.
  • Page 16 Test Point purpose operation TP6001 To confirm mechanism Ground the movement without a TP6001 cassette, the detection of the Supply / Takeup Photo Transistors, Reel Sensor, and Cylinder Lock will be inhibited. TP6003 To defeat the Auto Place a jumper Tracking Function.
  • Page 17 Fig. 4 3.2.7. VCR Lock Feature This feature prohibits all operations except for timer recording, and tape eject. This is useful to prevent misoperation and protect your VCR. To set the VCR Lock Feature: Press STOP/EJECT button on VCR for 7 seconds during Stop, or Power OFF mode.
  • Page 18 Fig. 5-1 To cancel the VCR Lock Feature: Press STOP/EJECT button on VCR for 7 seconds again during Stop, or Power OFF mode. Fig. 5-2 VCR Lock mode is cancelled automatically after 24 hours when the clock is set. 3.2.8. Set Tracking to the Neutral Position Pressing eject and reinserting a Tape will initiate the Auto Tracking function from the Neutral position.
  • Page 19 3.2.10. Function of important Test Points Function of important Test Points TP3001 Video signal to Jack TP3002 PB/REC video envelope signal TP3009 Video signal from Jack TP4001 Audio signal from Jack TP4002 Audio signal to Jack TP6001 Service Test Point (inhibit sensors) TP6003 defeat Auto tracking function (connect to +5V(TP6009))
  • Page 20 Fig. 6 3.2.12. How to Remove a jammed Tape A. Electrical Method 1. In the order described in the Disassembly of Cabinet Parts Section, remove the Top Cover and Front Panel Ass'y. 2. Cut the wire to open Jumper(J6004) on the System Control Section of the Main C.B.A.
  • Page 21 Fig. 7-1 3. Connect a DC Power Supply to the wire as shown in Fig. 7-2, then apply +6.0+-0.1VDC to J6004 in order to start the unloading operation sequence. 4. When the tape Loading Arms are returned to the fully unloaded position, disconnect the DC Power Supply Unit to stop the unloading operation.
  • Page 22 Fig. 7-2 5. To rewind the tape into the cassette, turn the Capstan Pulley counterclockwise as shown in Fig. 7-3. Fig. 7-3 6. Then eject the Tape using the DC Power Supply again. 7. After completion of the procedure, resolder the jumper wire (J6004) that was opened.
  • Page 23 Top Cover and Front Panel Ass'y. 2. Remove a Cut Washer (C-1) on the Pressure Roller Arm Unit as in Fig. J3, Page 2-16. 3. Remove the Spring of the Pressure Roller Arm Unit as in Fig. 4. Turn the Pressure Roller Arm counterclockwise and lift it up to release from the Pressure Roller bracket and shaft.
  • Page 24 Fig. 8 3.3.2. How to remove the VCR Chassis Unit from the frame: 1. In the order described in the Disassembly of Cabinet Parts Section, remove the Top Cover, Power Supply Ass'y and Front Panel Ass'y. 2. Remove Screw (S-4) and Screw (S-5) in Fig.
  • Page 25 Fig. 9 3.3.3. Handling of the Main C.B.A. when Servicing DO NOT pull the Main C.B.A. in the direction indicated by the arrow. DO NOT pull upward while holding the UHF/VHF Tuner/TV Demodulator Unit because you may crack the Main C.B.A.
  • Page 26 Fig. 10 3.3.4. Removal/Installation of Mechanism Chassis to the Main C.B.A. Preparation 1. In the order described in the Disassembly of Cabinet Parts Section, remove the Top Cover and Front Panel Ass'y . 2. Remove Screw (S-5) in Fig. D4, Page 2-2. 3.
  • Page 27 Fig. 11-1-1...
  • Page 28 Fig. 11-1-2 b. Installation Connect the Mechanism Chassis to the Main C.B.A., as shown below. Be sure to press the rear portion of the mechanism chassis to insert connectors securely. Fig. 11-2 3.3.5. How to remove the Cassette Up Ass'y 1.
  • Page 29 Plug No. Location of Trap Type Connectors P2505-P1541Unit A/C Head P3504-FE Head Unit FE Head Unit To identify Pin 1 of the Flat Cable, a different Color Identification Line is used. To locate Pin 1 on the Trap Connector, find the pin 1 indicator on the C.B.A. Fig.
  • Page 30 Fig. 12-2 (Removal and Installation of the Flat Cable) Type A (Removal) Pull out the Flat Cable. Minimize stress by holding it securely to avoid damage of the individual wires. (See Fig. 12-3.) (Installation) Adjust the position of the Flat Cable so that the Identification Line on the Flat Cable aligns with Pin 1 of the Trap Connector and align the individual wire with its individual Trap Connector Hole.
  • Page 31 Fig. 12-3 Type B (Removal) Open the Trap Connector, and pull out the Flat Cable. Minimize stress by holding it securely to avoid damage of the individual wires. (See Fig. 12-4.) (Installation) Adjust the position of the Flat Cable so that the Identification Line on the Flat Cable aligns with Pin 1 of the Trap Connector and align the individual wire with its individual Trap Connector Hole.
  • Page 32 Fig. 12-4 Note: After installation, inspect the connection to ensure that individual wires are not bent or touching another wire. 3.3.8. Service of Capstan Motor Drive C.B.A. When servicing, avoid touching IC2502 on the Capstan Motor Drive C.B.A. because it is HOT during normal operation.
  • Page 33 Fig. 13 3.3.9. How to place the Cassette Holder Unit in the Down Position without a Cassette Tape To place the Cassette Holder Unit in the down position without a cassette tape, use the following procedure. Method 1 - Refer to Fig.
  • Page 34 FIG. 14-1 Fig. 14-2 Method 2 is an alternate method for loading with no tape. Method 2 - Refer to Fig. 14-1 14-2 1. In the order described in the Disassembly of Cabinet Parts Section, remove the Top Cover. 2. Place a jumper between TP6001 on the System Control Section of the Main C.B.A. and GND.
  • Page 35 3. Connect the AC Cord. 4. The VCR turns ON automatically and the Cassette Holder Unit is loaded. The top of Set Lever L and R is locked by the First Locking Tab (Left and Right). Then the VCR turns OFF. 5.
  • Page 36 The Infrared Remote Control Unit replacement part is available as a complete assembly unit only. Do not try to disassemble the Infrared Remote Control Unit. However, the battery cover is available separately as a replacement part. 3.3.15. Replacement Procedure for Leadless (Chip) Components The following procedures are recommended for the replacement of the leadless components used in this unit.
  • Page 37 Fig. 15-1 3. Installing the leadless component A. Presolder the contact points on the circuit board. Fig. 15-2 B. Press the part downward with tweezers and solder both electrodes as shown below. Fig. 15-3 Note: Do not glue the replacement leadless component to the circuit board.
  • Page 38 Note: Refer to Item 6 of Shematic and C.B.A. Diagram Notes, Page 3-1 for mark "Z". How to distinguish Model PV-4601 A from PV-4601 B: Please note the Model No. Label located on the rear side of the VCR. Model No.
  • Page 39: Mechanical Adjustment Procedures

    4. ADJUSTMENT PROCEDURES 4.1. MECHANICAL ADJUSTMENT PROCEDURES 4.1.1. DISASSEMBLY OF CABINET PARTS 4.1.1.1. DISASSEMBLY FLOWCHART This flowchart indicates the disassembly steps of the cabinet parts and the P.C. Boards in order to gain access to the item(s) to be serviced. When reassembling, perform the step(s) in the reverse order.
  • Page 40 Fig. D1...
  • Page 41: Disassembly Method

    4.1.1.2. DISASSEMBLY METHOD Step/Loc.No. Part Fig.No. Remove Note Top Cover 2(S-1), 2(S-2) Power Supply (S-3), P1001, (L-1) Ass'y 3(L-2) Bottom Panel D3,D4 (S-3), (S-4), (S-5), 2(L-3) Front Panel 8(L-4), Ass'y Not Used ---- ------------------ VCR Chassis 2(S-6), 2(S-7), 2(S-8), Unit (S-9), (S-10), (S-11), 2(S-12), Chassis Plate,...
  • Page 42 Fig. D2...
  • Page 43 Fig. D3...
  • Page 44 Fig. D4...
  • Page 45 Fig. D5...
  • Page 46 Fig. D7...
  • Page 47 Fig. D8...
  • Page 48 Fig. D9 Reference <Notes> in Chart, Page 2-1: 1. When removing the Shield Case of the Power Supply Ass'y, twist and straighten 3 Locking Tabs (L-2) on the Power Supply AssÕy in Fig. D3. Then remove the Shield Case by pulling it away from the Power Supply Ass'y. 2.
  • Page 49 C.B.A. may be damaged or caused to be fixed in the ON position. Fig. D10 3. Make sure that Steps 2, 3, and 4 are completed. When removing the VCR Chassis Unit, refer to Note Item 5, Page 1-7 and "How to remove the VCR Chassis Unit from the frame:,"...
  • Page 50 Fig. M1 Note: 1. Do not rub vertically. 2. Do not apply any pressure to the head. If contaminant is not easily removed, continued gentle wiping will usually remove it. 3. Clean the Cylinder surface with Ethanol if fingerprints are present after cleaning the Video Heads.
  • Page 51 Fig. M2-1 Fig. M2-2...
  • Page 52 2. CLEANING OF D.D. CYLINDER SHAFT AND THE SURFACE 1. Before reinstalling a new unit, clean the D.D. Cylinder Shaft and the surface that engages with the Upper Cylinder with a soft cloth dampened with Ethanol in Fig. Fig. 3 3.
  • Page 53 Fig. M4-1...
  • Page 54 Fig. M4-2 2. Tighten 2 Screws with Washers (A) shown in Fig. M2-1 or Fig. M2-2. 3. Clean the Upper Cylinder with a deerskin swab (Head Cleaning Stick) saturated with Ethanol. Note: Upon completion of replacement, perform "TAPE INTERCHANGEABILITY ADJUSTMENT (FINAL ADJUSTMENT),"...
  • Page 55 4.1.3.2. REPLACEMENT OF CYLINDER UNIT Work with extreme care when removing or replacing the Cylinder Unit. Do not touch Video Heads during servicing. 1. Remove the VCR Chassis Unit. 2. Remove the Main C.B.A. 3. Place the Mechanism Chassis and Cassette Up Ass'y upside down. 4.
  • Page 56 Fig. M5-1 10. Reinstall the Cylinder Unit on to the chassis by reversing the procedure previously described. Note: 1. Reinstall the Cylinder Unit so that the 2 projections on the Cylinder Base of chassis meet the 2 holes on the lower surface of the Cylinder. Then while twisting the D.D. Cylinder as shown in Fig.
  • Page 57 Fig. M5-2 2. Hold the Cylinder with extreme care so as not to touch the Heads or the tape path on the Cylinder. If any of these parts are touched, clean them with a deerskin swab (Head Cleaning Stick) saturated with Ethanol. 3.
  • Page 58 Fig. M6 4.1.3.4. POSITION ADJUSTMENT OF TENSION POST (PRELIMINARY) Purpose : To feed a constant tension to the tape so that the tape runs with stability, by performing a preliminary adjustment. Symptom of Misadjustment : 1) If the adjusted value is below the specification, the tape tension is not sufficient, thus causing a tape slack to occur.
  • Page 59: Measurement And Adjustment Of Back Tension

    Fig. M7 4.1.3.5. MEASUREMENT AND ADJUSTMENT OF BACK TENSION Purpose : To fine adjust the Back Tension so that the tape runs smoothly with a constant tension. Symptom of Misadjustment : 1) If the tape tension is less than the specified value, the tape cannot come into proper contact with the Video Heads, resulting in poor picture playback.
  • Page 60 VHS Cassette Tape (120-Minute Tape) *Specification ........20 to 25g 1. Remove the Top Cover. 2. Play back a T120 cassette tape from its beginning for approx. 10 to 20 seconds, until the tapeÕs movement has stabilized. 3. Insert a Tension Meter into tape path and confirm the reading. 4.
  • Page 61 Tension Arm Base Teeth in either direction as indicated by the arrow to obtain the specified tension. (See Fig. M9). 2. Re-position the Tension Spring toward the front to increase tension, or toward the rear to decrease tension. 3. Reinstall the Cassette Up Ass'y and verify tension with the meter once again. 4.
  • Page 62 To properly align the height of the tape wound on the Supply and Take-Up Reels. Symptom of Misadjustment : If the height of the tape is not properly aligned, the tape will eventually be damaged. * Equipment Required : Post Adjustment Plate .........(VFKS0010) Reel Table Height Fixture ......(VFKS0009) * Specification 0+-0.1mm 1.
  • Page 63 4. If the difference is more than 0.1mm (higher or lower), adjust the height of the reel table to obtain the specified height. 5. For adjustment, change the poly washer located under the reel table. (The washer is available in only one size of 0.13mm thick.) Move the locking tab to remove the reel table.
  • Page 64 Fig. M11-1 2. First, lower all posts to match the height condition as shown in Fig. M11-2. The upper edge of the lower tape guide on each post should be below the bottom of the foot. Fig. M11-2...
  • Page 65 3. Place the fixture on the Post Adjustment Plate and fit the foot to the Adjustment Plate as shown in Fig. M11-2. (The foot of the fixture should be fully lowered until it touches the plate.) 4. Set the fixture to zero ("0") and slowly raise the post until it just touches the foot. When the foot touches the post, it should fit as shown in Fig.
  • Page 66 Fig. M11-4 1. Place the Post Adjustment Plate over the Reels, and put the Fixture on it. Set the Fixture to zero ("0") when the foot just touches the Post Adjustment Plate. 2. Slightly raise the P5 post above the plate by turning the 5.5mm Nut counterclockwise.
  • Page 67 H-Position Adjustment Screwdriver ..(VFKS0082) 1. CONFIRMATION OF TAPE TRAVEL Purpose : To be sure that the tape runs smoothly. Symptom of Misadjustment : If the tape travels with instability, the tape will be damaged. 1. Play back a T120 cassette tape and confirm that the tape travels without curling at the upper and lower guides on posts P2 and P3.
  • Page 68 that the lower edge of the tape runs 0.25mm above the lower edge of the control head. If it doesnÕt, turn Black Screws (A), (B), and (C) slightly in either direction as necessary to correct it. Turn clockwise to lower the head and counterclockwise to raise it.
  • Page 69 Symptom of Misadjustment : If the tilt of the A/C Head is poorly adjusted, the tape will eventually be damaged. An intermittent Blue screen may be seen in Playback. 1. Play back a T120 Cassette tape and confirm that the tape runs properly between the lower and upper limits of the P4 post.
  • Page 70 Fig. M15 4. Readjust Black Screw (A), shown in Fig. M13, for maximum output. 5. Disconnect the oscilloscope. 5. HORIZONTAL POSITION ADJUSTMENT OF A/C HEAD Purpose : To adjust the Horizontal Position of the A/C Head. Symptom of Misadjustment : If the Horizontal Position of the A/C Head is not properly adjusted, a maximum envelope cannot be obtained at the Neutral Position of the Tracking Control Circuit.
  • Page 71 7. If the number of pushes is not the same, then loosen the Black Screw with 2 Washers (D) and set the H-Position ADJ. Screwdriver into the Hole (E) shown in Fig. M16. Then find the center point. Then repeat the above procedure to determine the center point.
  • Page 72 If adjustment is required, turn the top of the post with a Post Adjustment Screwdriver. For adjustment of P2 and P3, refer to "CONFIRMATION OF TAPE TRAVEL," Page 2-9. Fig. M17-1 3. When the scope display is as shown in Fig. M17-2, adjust the height of P2 so that the waveform looks like the one shown in Fig.
  • Page 73 Fig. M17-3 5. When P2 and P3 are adjusted properly, there is no Envelope Drop at the beginning or end of the track as shown in Fig. M17-4. Fig. M17-4 6. Remove a jumper between TP6003 and +5V(TP6009). Note: Upon completion of the adjustment of P2 and P3, confirm the Horizontal Position of the A/C Head by pushing the Tracking Control Up or Down Buttons alternately, using the Infrared Remote Control Unit, to check the symmetry of the envelope.
  • Page 74 Oscilloscope * Specification : ...........0.13 ± 0.02mm 1. Remove the VCR Chassis Unit and then place it upside down. 2. Remove the Main C.B.A. 3. Slightly loosen 2 Black Screws (A) and set the Screwdriver (#1 or #2 Phillips Driver) into the Hole (B) shown in Fig. M18. Turn the screwdriver counterclockwise until the FG Head touches the rotor.
  • Page 75 Fig. M18 Note: Do not touch the outside circumference of the rotor surface with any tool and keep magnetic material away from the rotor magnet (especially metal particles). (Confirmation) 1. Supply a Video Signal to the Video Input Jack on the rear side of the deck. 2.
  • Page 76 1. Remove the Capstan Belt (Fig. M18). 2. In the order described in the Disassembly and Assembly Procedures of Mechanism section, remove the Motor Block Ass'y. 3. Carefully pull out the Capstan Rotor Unit. Be careful not to lose the 2 Oil Seals shown in Fig.
  • Page 77 Fig. M19...
  • Page 78 Fig. M20 4. Carefully unsolder P2502 on the Capstan Motor Drive C.B.A.. Then remove the Capstan Motor Drive C.B.A. by removing 2 Screws (D) shown in Fig. M20. 5. Remove 3 Screws (C) and 2 Screws (E) and then lift out the Capstan Stator Unit. 6.
  • Page 79 9. Re-install the Capstan Motor Drive C.B.A. by tightening 2 Screws (D). Then carefully solder P2502 and re-install the Motor Block AssÕy. ADJUSTMENT OF THRUST ADJUST SCREW AND OIL SEALS 10. Re-install the Capstan Belt and, while exerting pressure to turn the Clutch Unit, tighten the Thrust Adjust Screw slowly until the Capstan Rotor just starts turning.
  • Page 80 Mechanical Disassembly is performed with the Top Cover, Front Panel Ass'y, Main Circuit Board and the Cassette Up Ass'y removed. Also, all the following procedures for adjustment and parts replacement should be performed in EJECT position. (Refer Fig. Fig. B1, Page 2-19, 2-22.) Follow the steps in reverse order for reassembly. Step/Loc.
  • Page 81 Step/Loc. No. Prior Step Part Fig. No. Remove Note 7, 11, Loading Arm T ------------ 12,13, 14 Unit 7, 11, Loading Arm S (L-8) 12,13, 14 Unit 7, 11, 12,13 Center Block 2(S-4) Unit Capstan Holder 3(S-5) Unit Not used ----------- FE Head Unit (S-6),...
  • Page 82 Steps to be completed prior to the current step. Part to be removed or installed. Location of part. T=Top B=Bottom Fig. No. showing Procedure or Part Location. Identification of part to be removed, unhooked, unlocked, released, unplugged, unclamped, or unsoldered. (P-1) = Spring(P-1);...
  • Page 83 as to be out of the path of the Cassette Up Ass'y screw. Spring Guide Pressure Roller Bracket Guide Capstan Holder Unit Pressure Roller Arm (C-1) Fig. J3 Fig. J4...
  • Page 84 Fig. J5...
  • Page 85 Fig. J6...
  • Page 86 Main Brake Spring/Soft Brake Springs Hook Positions Spring (P-2) (P-3) (P-2) (L-3) Note 12 (L-3) (L-2) Bottom View Setting Condition Pins of Brake Ass'y Fig. J7 Fig. J8...
  • Page 87 Fig. J9...
  • Page 88 Fig. J10...
  • Page 89 Fig. J11...
  • Page 90 Fig. J12...
  • Page 91 Fig. J13...
  • Page 92 Fig. J15...
  • Page 94: Alignment Procedures Of Mechanism

    Fig. J16 Fig. J17 4.1.3.12. ALIGNMENT PROCEDURES OF MECHANISM The following procedures describe how to align the individual gears and levers that make up the tape loading/unloading mechanism. Since information about the state of the mechanism is provided to the System Control Circuit only through the Mode Select Switch, it is essential that the correct relationship between individual gears and levers be maintained.
  • Page 95 All alignments are to be performed with the mechanism in the Eject mode, in the sequence given. Each procedure assumes that all previous procedures have been completed. Important Note : If any one of these alignments is not performed properly, even if off by only one tooth, the unit will unload or stop and it may result in damage to the mechanical or electrical parts.
  • Page 97 Fig. A1 (ALIGNMENT 1) LOADING ARM T UNIT AND LOADING ARM S UNIT 1. Place the P2 and P3 posts to the unloading position. 2. Install the Loading Arm T Unit and the Loading Arm S Unit so that the hole on the Loading arm T Unit is aligned with the hole on the Loading Arm S Unit.
  • Page 98 Fig. A2 (ALIGNMENT 2) MAIN ROD AND LOADING ARM T UNIT 1. Install the Main Rod so that the rib on the Main Rod aligns with the shaft of the Loading Arm T Unit. Make sure that the shafts of the Brake Ass'y are positioned as shown in Fig. A3.
  • Page 99 Fig. A3 (ALIGNMENT 3)CAM GEAR, LINK GEAR AND GENEVA GEAR 1. First, install the Geneva Gear, then the Cam Gear as shown in Fig. A4. 2. Turn the Loading Pulley of the Motor Block Ass'y in the direction shown by arrow in Fig.
  • Page 100 Bracket. 3. Install the Link Gear so that the holes are aligned with the holes on the Geneva Gear and Motor Bracket. (ALIGNMENT 4)MODE SELECT SWITCH AND CAM GEAR 1. Install the Mode Select Switch so that the indentation on the Mode Select Switch aligns with the indentation on the Cam Gear.
  • Page 101 Fig. A5 (ALIGNMENT 5)P5 SECTOR GEAR AND P5 ARM UNIT 1. Install the P5 Sector Gear. 2. Install the P5 Arm Unit so that the last tooth of the gear is just outside the teeth of the P5 Sector Gear as shown in Fig. A6. (ALIGNMENT 6)PINCH LIFT CAM AND LINK GEAR 1.
  • Page 102 with the holes on the Pinch Lift Cam as shown in Fig. A6.
  • Page 104 Fig. A6 4.1.3.13. DISASSEMBLY / ASSEMBLY PROCEDURES OF CASSETTE UP ASS'Y When reassembling, follow the steps in reverse order. Prior Part Fig. Remove Note Step/Loc. Step Top Plate Ass'y (S-1), 2(L-1) 3 Wiper Arm L Unit (S-2), (L-2) Main Shaft Gear L ------------- Wiper Arm R Unit (S-3), (L-3)
  • Page 105 Fig. K1...
  • Page 106 Fig. K2...
  • Page 107 Fig. K3...
  • Page 108 Fig. K4 4.1.3.14. ALIGNMENT PROCEDURES OF CASSETTE UP ASS'Y The following procedures describe how to align the individual gears and levers of Cassette Up Ass'y. All alignments are to be performed with the Cassette Up Ass'y in the Eject position. Alignment points in Eject position :...
  • Page 109 Fig. B1...
  • Page 110 (ALIGNMENT 1)CASSETTE OPENER AND RACK Ass'y 1. Install Cassette Opener into Side Plate R Ass'y slot and slide it to the far end of the slot. 2. Slide the Rack Ass'y in the direction shown by arrow so that the nipple of Cassette Opener is inside the slot of Rack Ass'y as shown in Fig B2.
  • Page 111 Fig. B3 (ALIGNMENT 4)WIPER ARM L UNIT AND MAIN SHAFT GEAR L 1. Install the Main Shaft Gear L and Wiper Arm L Unit so that mark on the Wiper Arm L Unit is aligned with the holes on the Main Shaft Gear L as shown in Fig. B4.
  • Page 112: Service Fixtures And Tools

    Fig. B4 4.1.3.15. HOW TO INSTALL CASSETTE UP ASS'Y ONTO MECHANISM CHASSIS 1. Confirm that the Cassette Up Ass'y and the mechanism are in the Eject position. (See Fig. Fig. 2. Carefully install the Cassette Up Ass'y onto the chassis so that all five guide pins fit into chassis holes (See Fig.
  • Page 113: Electrical Adjustment Procedures

    4.3. ELECTRICAL ADJUSTMENT PROCEDURES 4.3.1. TEST EQUIPMENT To do all of these electrical adjustments, the following equipment is required. 1. Dual-Trace Oscilloscope Voltage Range : 0.001 to 50V/Div. Frequency Range : DC to 50MHz Probes : 10:1, 1:1 2. Color TV Receiver or Monitor 3.
  • Page 114 Fig. E1 4.3.2. HOW TO READ THE ADJUSTMENT PROCEDURES...
  • Page 115 Fig. E2...
  • Page 116 Fig. E3 Cautions: Use an Isolation Transformer (Variable) Because a Hot Chassis Ground is present in the Switched Mode Power Supply Circuit, an Isolation Transformer must be used. Also, in order to have the ability to increase the input voltage slowly, when troubleshooting this type of Power Supply Circuit, a variable Isolation Transformer is required.
  • Page 117: Servo Section

    4.3.3. ADJUSTMENT PROCEDURES These adjustment procedures consist of the following sections. 1. Servo Section 2. MTS/SAP Section 4.3.3.1. SERVO SECTION HEAD SWITCHING POSITION ADJUSTMENT (PG SHIFTER) Purpose: Determine the Head Switching Point during Playback. Symptom of Misadjustment: May cause Head Switching Noise and/or Vertical Jitter in the picture. ADJ.
  • Page 118 Fig. E4 4.3.3.2. MTS/SAP SECTION Model : D,E INPUT LEVEL ADJUSTMENT ADJ. MODE INPUT Pin 4 R7007 STOP (ANTENNA INPUT TERMINAL) U9001 MONO 300Hz+-5Hz 100% Modulating TAPE M.EQ. SPEC. --------- AC MILLIVOLT METER 150 +- 5mVrms MTS/SAP SIGNAL GENERATOR 424 +-15mVp-p Note:...
  • Page 119: Schematic Diagrams

    Pin 4 of U9001(12-Pin MTS/SAP HIC) : Video Signal Process Section on the Main C.B.A. R7007 : Demodulator Section on the Main C.B.A. 1. Connect the RF OUTPUT of the MTS/SAP Signal Generator to the Antenna Input Terminal. 2. Connect the AC Millivolt Meter to Pin 4 of U9001. 3.
  • Page 120 5.5. Main I (Power Supply/System Control/Servo/Operation) Schematic Diagram(B) 5.6. Main II (Signal Process/Audio) Schematic Diagram (B) 5.7. UHF/VHF Tuner/TV Demodulator Schematic Diagram(A,C) 5.8. UHF/VHF Tuner/TV Demodulator Schematic Diagram(D,E) 5.9. UHF/VHF Tuner/TV Demodulator Schematic Diagram(B) 5.10. Hi-Fi Audio Schematic Diagram 5.11. Head Amp Schematic Diagram 5.12.
  • Page 121: Circuit Board Diagrams

    5.13. Interconnection Schematic Diagram 6. CIRCUIT BOARD DIAGRAMS 6.1. Power Supply C.B.A. VEPS1002B2(A,B,C)/VPES1002D2(D,E) 6.2. Power Supply C.B.A. VEPS01042G2(B) 6.3. Capstain Motor Drive C.B.A. VEPS02221C1(A,C,D,E)/VEPS02221D1(B) 6.4. Capstain Motor Drive C.B.A. VEPS02232B1(B) 6.5. Main (Power Supply/Signal Process/Audio/System Control/Servo/Operation) C.B.A. VEPS6001GA12(A)/VEPS6001GA1(C)/VEPS6001HA1(D,E) 6.6. Main (Power Supply/Signal Process/Audio/System Control/Servo/Operation) C.B.A.
  • Page 122: Exploded Views

    6.7. Hi-Fi Audio C.B.A. 6.8. Head Amp C.B.A. 6.9. Hi-Fi Audio/Video Head Amp C.B.A. 6.10. Signal Waveform 6.11. Voltage Chart 7. EXPLODED VIEWS TRANSPORT SECTION MOVING MECHANISM SECTION CASSETTE UP MECHANISM SECTION CHASSIS FRAME AND CASING PARTS SECTION...
  • Page 123: Packing Parts And Accessories Section

    PACKING PARTS AND ACCESSORIES SECTION 8. REPLACEMENT PARTS LIST 8.1. MECHANICAL REPLACEMENT PARTS LIST USE ONLE ORIGINAL VIDEO REPLACEMENT PARTS LIST: To maintain original FUNCTION and RELIABILITY of repaired units, use only ORIGINAL REPLACEMENT PARTS which are listed with their part numbers in the parts list section of the Service Manual.
  • Page 124 Ref. No. Part No. Part Name Remarks (Grid No.) VEPS0541 FE HEAD UNIT 1(D-2) VBKS0024 FG HEAD 2(F-2) VDGS0416 CAM GEAR 2(F-5) VDGS0415 LINK GEAR 2(F-6) VDGS0408 MAIN SHAFT GEAR L 3(E-1) VDGS0409 PINCH LIFT CAM 1(E-6) VDGS0412 P5 SECTOR GEAR 1(D-6) VDPS0210 P1 ROLLER...
  • Page 125 Ref. No. Part No. Part Name Remarks VKUS0265 ( D,E ) 4(A-5) VMAS2094 P.C.B. BRACKET 2(C-4) VMAS2099 TOP PLATE 3(H-5) VMAS2103 SUPPORT ANGLE 1(A-6) VMAS2124 CHASSIS PLATE 4(D-4) VMBS1099 ROD RETURN SPRING 2(G-3) VMBS0896 RELEASE PIECE SPRING 2(G-2) VMBS1103 TENSION SPRING 1(F-2) VKAS0047 RUBBER FOOT...
  • Page 126: Screws & Washers

    Ref. No. Part No. Part Name Remarks VXLS0850 LOADING ARM T UNIT 2(E-3) VXLS0852 LOADING ARM S UNIT 2(B-6) VXLS1012 P5 ARM UNIT 1(B-6) VXLS1027 WIPER ARM R UNIT 3(B-6) VXMS0129 SECONDARY ROD UNIT 2(H-3) VXPS0367 CAPSTAN ROTOR UNIT 2(G-2) VXPS0374 ROLLER POST UNIT 1(C-5/D-4)
  • Page 127 Ref. No. Part No. Part Name Remarks XYE26+CF8J TAPPING SCREW WITH WASHER VHDS0478 AC FRONT SCREW XTV2+5FFZ TAPPING SCREW 2X5 VMXS0857 CUT WASHER VHDS0310 SCREW 3X12 XTV3+8JR TAPPING SCREW 3X8 XWGV3Z54G POLY SLIDER WASHER 3 VHDS0455 SCREW WITH WASHER 3X10 XTV3+8J TAPPING SCREW 3X8 XWGV3D54G...
  • Page 128: Electrical Replacement Parts List

    UNUSED ITEM NUMBERS 18, 19, 20, 27, 31, 32, 33, 34, 37, 39, 40, 46, 47, 48, 49, 52, 53, 60, 61, 65, 68, 72, 75, 76, 101, 102, 103, 104, 105, 106, 107, 110, 111, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 402, 407, 412, 417, 420, 426, 428, 432, 433, 436, 437, 438, 439, 441, 443, 445, 446,...
  • Page 129 shown in the exploded views. The E item numbers are also printed on the same page at the top of the column. 8. The parts with "Û" mark are supplied individually or as a unit. The parts with "ÛÛ" mark are supplied individually or as a unit, and are included in "Û"...
  • Page 130 interchangeable parts will be supplied as a replacement for individual parts. Capstan motor drive C.B.A. replacements note: VEPS02221D1 or VEPS02232B1 is used for Capstan motor drive C.B.A.. However, for parts standardization, VEPS02221C1 will be supplied as a replacement for this model.
  • Page 131 Ref. No. Part No. Part Name Remarks MAIN C.B.A. Û ( A,C,D,E ) IC3001 AN3459NFBP IC BIPOLAR LINEAR VIDEO/AUDIO PROCESS IC3201 MN3870S IC MOS LOGIC CCD 1H DELAY E.S.D. IC3301 LC74723M9141 IC MOS LOGIC CHARACTER E.S.D. GENERATOR IC6001 MN675048A3J IC MOS LOGIC SYSTEM E.S.D.
  • Page 132 Ref. No. Part No. Part Name Remarks D1051 MA4100N ZENER 10V D1052 MA165 D1053 MA165 D3004 MA4091-M ZENER 9.1V D6001(E30) VEKS5201 SENSOR LED UNIT D6003 MA165 D6030 MA165 D6201 MA165 D6202 MA165 D6203 MA165 D6204 MA165 D6324 MA4068-M ZENER 6.8V D7002 MA4270-M ZENER 27V...
  • Page 133 Ref. No. Part No. Part Name Remarks R3302 ERJ6GEYJ222V MGF CHIP 1/10W 2.2K R3303 ERJ6GEYJ473V MGF CHIP 1/10W 47K R4001 ERJ6GEYJ103V MGF CHIP 1/10W 10K R4002 ERJ6GEYJ334V MGF CHIP 1/10W 330K R4003 ERJ6GEYJ221V MGF CHIP 1/10W 220 R4004 ERJ6GEYJ333V MGF CHIP 1/10W 33K R4005 ERJ6GEYJ225V MGF CHIP 1/10W 2.2M...
  • Page 134 R6004 ERJ6GEYJ333V MGF CHIP 1/10W 33K...
  • Page 135 Ref. No. Part No. Part Name Remarks ( D,E ) R6005 ERJ6GEYJ223V MGF CHIP 1/10W 22K ( D,E ) R6006 ERJ6GEYJ103V MGF CHIP 1/10W 10K R6007 ERDS1TJ8R2 1/2W 8.2 R6008 ERDS1TJ8R2 1/2W 8.2 R6011 ERJ6GEYJ102V MGF CHIP 1/10W 1K ( D,E ) R6012 ERJ6GEYJ103V MGF CHIP 1/10W 10K...
  • Page 136 R6085 ERJ6GEYJ223V MGF CHIP 1/10W 22K...
  • Page 137 Ref. No. Part No. Part Name Remarks R6086 ERJ6GEYJ223V MGF CHIP 1/10W 22K R6087 ERJ6GEYJ223V MGF CHIP 1/10W 22K R6092 ERJ6GEYJ221V MGF CHIP 1/10W 220 ( D,E ) R6093 ERJ6GEYJ103V MGF CHIP 1/10W 10K ( D,E ) R6094 ERJ6GEYJ103V MGF CHIP 1/10W 10K R6095 ERJ6GEYJ102V MGF CHIP 1/10W 1K...
  • Page 138 R6352 ERDS2TJ750 Ref. No. Part No. Part Name Remarks ( A,C ) ERDS2TJ101 ( D,E ) R6353 ERJ6GEYJ473V MGF CHIP 1/10W 47K R6358 ERJ6GEYJ223V MGF CHIP 1/10W 22K R7001 ERJ6GEYJ473V MGF CHIP 1/10W 47K ( A,C ) R7002 ERJ6GEYJ271V MGF CHIP 1/10W 270 R7003 ERDS2TJ102 R7006...
  • Page 139 Ref. No. Part No. Part Name Remarks C3046 ECEA1HKA2R2 ELECTROLYTIC 50V 2.2 C3047 ECEA0JKA221 ELECTROLYTIC 6.3V 220 C3048 ECUV1E104ZFN C CHIP +80% 25V 0.1 C3049 ECA0JM471I ELECTROLYTIC 6.3V 470 C3050 ECUV1E104ZFN C CHIP +80% 25V 0.1 C3051 ECUV1E104ZFN C CHIP +80% 25V 0.1 C3062 ECUV1H560JCN C CHIP +-5% 50V 56P...
  • Page 140 C4601 ECEA1CKA100 ELECTROLYTIC 16V 10...
  • Page 141 Ref. No. Part No. Part Name Remarks ( D,E ) C4603 ECEA1CKA100 ELECTROLYTIC 16V 10 C4606 ECEA1CKA100 ELECTROLYTIC 16V 10 ( D,E ) C4608 ECUV1H103KBN C CHIP 50V 0.01 ( A,C ) C6002 ECUV1E104ZFN C CHIP +80% 25V 0.1 C6003 ECUV1E104ZFN C CHIP +80% 25V 0.1 C6005...
  • Page 142: Crystal Oscillator

    C7023 ECUV1H330JCN C CHIP + 5% 50V 33P Ref. No. Part No. Part Name Remarks C7024 ECUV1H103KBN C CHIP 50V 0.01 ( D,E ) COILS Ref. No. Part No. Part Name Remarks L3001 VLQSH02R680K L3004 VLQSH02R220K L3005 VLQSH02R330K L3006 VLQSH02R220K L3009 ELESN330KA L3010...
  • Page 143 Ref. No. Part No. Part Name Remarks PR1054 ICP-N38-TP1 IC PROTECTOR 1.5A OR UNH00010FA IC PROTECTOR 1.5A OR UNH000600A IC PROTECTOR 1.5A OR VSFS0029D25 IC PROTECTOR 1.5A TRANSFORMER Ref. No. Part No. Part Name Remarks T4101 EIQ7QF018Q PRINTED CIRCUIT BOARD ASSEMBLY Ref.
  • Page 144 Ref. No. Part No. Part Name Remarks MAIN C.B.A. Û ( B ) INTEGRATED CIRCUITS IC3001 AN3459NFBP IC BIPOLAR LINEAR VIDEO/AUDIO PROCESS IC3201 MN3870S IC MOS LOGIC CCD 1H DELAY E.S.D. IC3301 LC74723M9141 IC MOS LOGIC CHARACTER E.S.D. GENERATOR IC6001 MN675048A3J IC MOS LOGIC SYSTEM E.S.D.
  • Page 145 Ref. No. Part No. Part Name Remarks D1051 MA4100N ZENER 10V D1052 MA165 D1053 MA165 D3004 MA4091-M ZENER 9.1V D3010 MA165 D6001(E30) VEKS5201 SENSOR LED UNIT D6003 MA165 D6030 MA165 D6201 MA165 D6202 MA165 D6203 MA165 D6204 MA165 D6324 MA4068-M ZENER 6.8V D7002 MA4300-M...
  • Page 146 Ref. No. Part No. Part Name Remarks R4007 ERJ6GEYJ821V MGF CHIP 1/10W 820 R4008 ERJ6GEYG223V MGF CHIP +-2% 1/10W 22K R4009 ERJ6GEYJ473V MGF CHIP 1/10W 47K R4010 ERJ6GEYJ473V MGF CHIP 1/10W 47K R4011 ERJ6GEYJ682V MGF CHIP 1/10W 6.8K R4012 ERJ6GEYJ682V MGF CHIP 1/10W 6.8K R4014 ERJ6GEYJ472V...
  • Page 147 R6065 ERJ6GEYJ223V MGF CHIP 1/10W 22K...
  • Page 148 Ref. No. Part No. Part Name Remarks R6066 ERJ6GEYJ223V MGF CHIP 1/10W 22K R6068 ERJ6GEYJ223V MGF CHIP 1/10W 22K R6069 ERJ6GEYJ683V MGF CHIP 1/10W 68K R6070 ERJ6GEYJ683V MGF CHIP 1/10W 68K R6071 ERDS2TJ821 R6073 ERJ6GEYJ473V MGF CHIP 1/10W 47K R6074 ERDS2TJ272 2.7K R6075...
  • Page 149 R7055 ERJ6GEYJ153V MGF CHIP 1/10W 15K Ref. No. Part No. Part Name Remarks R7056 ERJ6GEYJ122V MGF CHIP 1/10W 1.2K R7060 ERJ6GEYJ334V MGF CHIP 1/10W 330K R7061 ERJ6GEYJ102V MGF CHIP 1/10W 1K R7062 ERJ6GEYJ221V MGF CHIP 1/10W 220 R7063 ERJ6GEYJ473V MGF CHIP 1/10W 47K R7064 ERJ6GEYJ822V MGF CHIP 1/10W 8.2K...
  • Page 150 Ref. No. Part No. Part Name Remarks C3050 ECUV1E104ZFN C CHIP +80% 25V 0.1 C3051 ECUV1E104ZFN C CHIP +80% 25V 0.1 C3062 ECUV1H560JCN C CHIP +-5% 50V 56P C3201 ECUV1E104ZFN C CHIP +80% 25V 0.1 C3202 ECUV1H472KBN C CHIP 50V 0.0047 C3203 ECUV1H102KBN C CHIP 50V 0.001...
  • Page 151 C6006 ECUV1H120JCN C CHIP + 5% 50V 12P Ref. No. Part No. Part Name Remarks C6008 ECUV1E104ZFN C CHIP +80% 25V 0.1 C6009 ECUV1H101JCN C CHIP +-5% 50V 100P C6010 ECUV1H101JCN C CHIP +-5% 50V 100P C6012 ECUV1E104ZFN C CHIP +80% 25V 0.1 C6016 ECEA0JU471 ELECTROLYTIC 6.3V 470...
  • Page 152 Ref. No. Part No. Part Name Remarks L3001 VLQSH02R680K L3004 VLQSH02R220K L3005 VLQSH02R330K L3006 VLQSH02R220K L3009 ELESN330KA L3010 ELESN470KA L3201 ELESN221KA L3302 VLQSH02R180J +-5% 18 L4001 ELELN153KA L4002 VLQSH02R101K L4101 ELESN471KA L7001 VLQSG06R221K L7002 ELESN101KA L7003 VLQSH02R1R0K L7004 VLQSH02R1R0K L7051 ELESN101KA CRYSTAL OSCILLATOR Ref.
  • Page 153 TRANSFORMER Ref. No. Part No. Part Name Remarks T4101 EIQ7QF018Q MISCELLANEOUS Ref. No. Part No. Part Name Remarks DP6301(E22) VEKS5381 DISPLAY TUBE UNIT JK3001(E11) VJHS0328 A/V JACK ENG56414G UHF/VHF TUNER/TV DEMODULATOR UNIT NR VEKS5442 INFRARED RECEIVER UNIT VGPS3976 REAR PANEL 8.2.4.
  • Page 154 Ref. No. Part No. Part Name & Description Remarks R4201 ERJ6GEYJ333V MGF CHIP 1/10W 33K R4203 ERJ6GEYJ223V MGF CHIP 1/10W 22K R4206 ERJ6GEYJ223V MGF CHIP 1/10W 22K R4207 ERJ6GEYJ822V MGF CHIP 1/10W 8.2K R4208 ERDS2TJ330 R4211 ERJ6GEYJ223V MGF CHIP 1/10W 22K R4212 ERJ6GEYJ225V MGF CHIP 1/10W 2.2M...
  • Page 155 Ref. No. Part No. Part Name Remarks C4201 ECUV1H152KBN C CHIP 50V 0.0015 C4202 ECUV1H152KBN C CHIP 50V 0.0015 C4203 ECEA0JKA470 ELECTROLYTIC 6.3V 47 C4204 ECUV1E104ZFN C CHIP +80% 25V 0.1 C4205 ECEA0JKA101 ELECTROLYTIC 6.3V 100 C4206 ECEA0JKA101 ELECTROLYTIC 6.3V 100 C4207 ECEA0JKA470 ELECTROLYTIC 6.3V 47...
  • Page 156 8.2.5. POWER SUPPLY C.B.A. Ref. No. Part No. Part Name Remarks POWER SUPPLY C.B.A. Û INTEGRATED CIRCUITS IC1001 PS2501-1-X IC BIPOLAR LINEAR ERROR V.DET OR 0N3131-R.KT IC BIPOLAR LINEAR ERROR V.DET TRANSISTORS Ref. No. Part No. Part Name Remarks Q1001 2SC4533LP.KT OR 2SC5130LF608 Q1002...
  • Page 157 Ref. No. Part No. Part Name Remarks ( A,B,C ) ERB81-004 OR RK14 ( D,E ) D1009 MA178 OR 1SS137T-77 ( A,B,C ) AK03 OR 1GWJ43 ( D,E ) D1011 MA4051NH ZENER 5.1V D1012 MA858 D1013 MA165 D1015 MA2180LA ZENER 18V OR 1N4746ARL ZENER 18V D1016...
  • Page 158 Ref. No. Part No. Part Name Remarks R1019 ERDS2TJ392 3.9K R1020 ERDS2TJ682 6.8K R1022 ERDS2TJ221 CAPACITORS Ref. No. Part No. Part Name Remarks C1001 ECKDRS103ZV CERAMIC +80% 125V 0.01 OR VCKSEKD103PZ CERAMIC +80% 125V 0.01 OR VCKSEMD103PZ CERAMIC +80% 125V 0.01 OR VCKSGKD103QZ CERAMIC +80% 125V 0.01 OR VCKSGMD103QZ...
  • Page 159 Ref. No. Part No. Part Name Remarks OR VCES11H4R7B ELECTROLYTIC 50V 4.7 ( A,B,C ) ECEA1HGE470B ELECTROLYTIC 50V 47 OR VCESV1H470B ELECTROLYTIC 50V 47 ( D,E ) C1016 ECEA1PEE331B ELECTROLYTIC 18V 330 OR VCESU1P331B ELECTROLYTIC 18V 330 C1017 ECA0JM102B ELECTROLYTIC 6.3V 1000 OR ECEA0JU102 ELECTROLYTIC 6.3V 1000 OR VCESM0J102B...
  • Page 160 FUSE & PROTECTOR Ref. No. Part No. Part Name Remarks F1001 VSFS0003A16 FUSE 125V 1.6A OR VSFS0012A16 FUSE 125V 1.6A OR VSFS0028A16 FUSE 125V 1.6A OR XBA1C16NU100 FUSE 125V 1.6A PR1001 ICP-F38 IC PROTECTOR 1.5A OR ICP-F38-1 IC PROTECTOR 1.5A OR UN10015 IC PROTECTOR 1.5A TRANSFORMER...
  • Page 161 Ref. No. Part No. Part Name Remarks C2501 ECEA1CKA100 ELECTROLYTIC 16V 10 C2502 ECEA1CKA100 ELECTROLYTIC 16V 10 C2503 ECEA1CKA100 ELECTROLYTIC 16V 10 C2504 ECUV1E104KBN C CHIP 25V 0.1 C2505 ECEA1HKA010 ELECTROLYTIC 50V 1 C2506 ECUV1E563KBN C CHIP 25V 0.056 C2507 ECUV1E104ZFN C CHIP +80% 25V 0.1 C2508...
  • Page 162 Ref. No. Part No. Part Name Remarks C2601 ECUV1E104ZFN C CHIP +80% 25V 0.1 C2602 ECUV1E104ZFN C CHIP +80% 25V 0.1 C2603 ECUV1E104ZFN C CHIP +80% 25V 0.1 C2604 ECUV1E104KBN C CHIP 25V 0.1 C2605 ECUV1E104KBN C CHIP 25V 0.1 C2606 ECUV1E104KBN C CHIP 25V 0.1...
  • Page 163 RESISTORS Ref. No. Part No. Part Name Remarks R2601 ERJ6GEYJ471V MGF CHIP 1/10W 470 R2602 ERJ6GEYJ471V MGF CHIP 1/10W 470 R2603 ERJ6GEYJ471V MGF CHIP 1/10W 470 R2604 ERDS2TJ1R0 R2605 ERDS2TJ1R2 R2606 ERJ6GEYJ561V MGF CHIP 1/10W 560 R3501 ERJ6GEYJ473V MGF CHIP 1/10W 47K R3502 ERJ6GEYJ560V MGF CHIP 1/10W 56...
  • Page 164 Ref. No. Part No. Part Name Remarks C3528 ECUV1E104ZFN C CHIP +80% 25V 0.1 C3529 ECUV1H103ZFN C CHIP +80% 50V 0.01 C3532 ECUV1E104ZFN C CHIP +80% 25V 0.1 C3533 ECUV1H103ZFN C CHIP +80% 50V 0.01 C4401 ECUV1H103ZFN C CHIP +80% 50V 0.01 C4402 ECUV1H103ZFN C CHIP +80% 50V 0.01...
  • Page 165: Block Diagrams

    Ref. No. Part No. Part Name Remarks SUMMARY OF "E" ITEM NUMBERS REFER TO ELECTRICAL PARTS LIST FOR MODEL INFORMATION VEPS6001GA12 MAIN C.B.A. VEPS6001GA1 MAIN C.B.A. VEPS6002GA12 MAIN C.B.A. VEPS6001HA1 MAIN C.B.A. VEPS4003A1 Hi-Fi AUDIO C.B.A. NR VEPS1002B2 POWER SUPPLY C.B.A. VEPS1002D2 POWER SUPPLY C.B.A.
  • Page 166 9.2. Power Supply Block Diagrams 9.3. Waveform and Checking Procedure of Power Supply Stage 9.4. Video/Normal Audio Block Diagram 9.5. Waveform and Checking Procedure of Video Stage 9.6. Hi-Fi Audio/MTS/SAP Block Diagrams 9.7. System Control Block Diagrams 9.8. Servo Block Diagrams 9.9.
  • Page 167 9.11. Operation Block Diagrams...
  • Page 168 Hi-Fi AUDIO/MTS/SAP BLOCK DIAGRAM (WITH FRONT AUDIO/VIDEO IC4201 Hi-Fi AUDIO HEAD AMP CIRCUIT JACK) REC AUDIO PB AUDIO TP4205 IC4401 J4302 L CH (NOISE REDUCTION) P4203 P3001 P3501 TP4203 REC AGC IC4301 DETECTOR MODULATOR TUNER LEVEL WEIGHTING SENSOR REAR R CH L CH AUDIO 20KHz...
  • Page 169: Operation

    VII. BLOCK DIAGRAMS OVERALL BLOCK DIAGRAM *First determine whether the trouble is due to an Operation Problem or a Picture Problem. Use the following chart and then refer to the related sections on the following pages for troubleshooting. POWER CONFIRM ALL MAKE A REC MAKE A P.B KEY OPERATION...
  • Page 170 OPERATION BLOCK DIAGRAM IC6301 SCAN 0 SCAN 1 SCAN 2 PIN 18 PIN 20 PIN 19 DATA 0 STOP KEY DATA 0 PIN 9 /REV /EJECT DATA 1 PLAY PIN 10 /CUE DATA 2 KEY DATA 3 PIN 11 /VCR DOWN DATA 3 POWER...
  • Page 171: Power Supply Block Diagram

    POWER SUPPLY BLOCK DIAGRAM F1001 T1001 L1001 D1001 125V/1.6A CHOKE FULL-WAVE COIL RECTIFIER D1002 (SWITCHING CONTROL) (SWITCHING) D1004 TP1001 D1003 D1016 C1011 D1005 UNSW P1001 P1051 SMOOTHING RECTIFIER +37V CIRCUIT C1012,C1013 D1006 UNSW P1001 P1051 SMOOTHING RECTIFIER +14V CIRCUIT D1015 (OVERVOLTAGE PROTECTOR) C1014 D1007...
  • Page 172: Servo Block Diagram

    SERVO BLOCK DIAGRAM IC6001 –1 BY PLACING A JUMPER BETWEEN REC CTL TP6003 AND +5V(TP6009), THE AUTO TRACKING FUNCTION IC2601 +14V WILL BE DEFEATED. DD CYLINDER PB-ON P3502 TP6003 Å–1 MOTOR (FROM VIDEO CIRCUIT) P3502 ENVELOPE ENVELOPE VOLTAGE DETECTOR CYLINDER NEGATIVE PB C6221R6229 C2611...
  • Page 173: System Control Block Diagram

    DEMODU(9)) D6018 WITHOUT VCR PLUS SIGNAL(L) D6019 WITH LINE 2 AUDIO DEFEAT(H) IC6003 D6020 WITH PX MODEL (PV-4601 A,PV-4601-K,PV-4651,PV-4651-K) U6301 SERIAL DATA 0 IR DATA D6021 WITH EP INDICATION RECEIVER OSD-CS(L) CONTROL WIRE JUMPER OR DIODE IS USED TAKEUP PHOTO TR(L)
  • Page 174: Timing Chart

    TIMING CHART TIMING CHART 2 BASIC OPERATION WITH MODE SELECT SWITCH ACTION CASSETTE IN/STOP (S-TAB ON) POSITION Degree 18.0 54.2 107.2 159.8 167.1 181.5 188.8 209.2 TIME ms* 2.6S 100 10 2.6S POS# LOADING FWD(H) (PIN 10) LOADING REV(H) (PIN 9) CAPSTAN ON(H) CAPSTAN...
  • Page 175 TIMING CHART 4 TIMING CHART 6 FF/REW ACTION PAUSE PAUSE RELEASE ACTION POSITION POSITION TIME ms* 2.6S 300 2.6S 100 3.2S 2.6S 2.6S 1.2S 1.5S TIME ms* 3.5S LOADING LOADING 4A-6 FWD(H) FWD(H) 4A-7 (PIN 10) (PIN 10) 4A-2 4A-3 4A-8 LOADING LOADING...
  • Page 176 TIMING CHART 8 ACTION STOP 5 MINUTES POSITION TIME ms* 2.6S LOADING FWD(H) (PIN 10) LOADING REV(H) (PIN 9) CAPSTAN ON(H) CAPSTAN R(H)/S(M)/F(L) (PIN 42) CYLINDER ON(L) PLAY AUDIO MUTE(H) (PIN 5) PB(L) (PIN 6) NOTE: 1) PIN NO. WITH BRACKET INDICATES PIN NO. OF IC6001. 2) *:IT SHOWS MAXIMUM TIME.
  • Page 177 VIDEO HEAD AMP CIRCUIT IC3221 (WITH 4 HEAD) (WITHOUT C3225,C3226 NOT USED QUASI S-VHS) NOT USED (FROM IC6001(44)) (FOR 4HEAD MODEL) L3222 (PV-4601 A, PV-4601-K, UHF/VHF TUNER (WITHOUT 7.16MHz CCD 1H Å1:INPUT SELECT (FROM IC6001(97)) PV-4651, PV-4651-K) /TV DEMODULATOR UNIT (WITH 2HEAD) DELAY...
  • Page 179 UHF/VHF TUNER/TV DEMODULATOR SCHEMATIC DIAGRAM NOTE: FOR SCHEMATIC AND C.B.A. DIAGRAM NOTES, REFER VIDEO SIGNAL AUDIO SIGNAL TO BEGINNING OF SCHEMATIC SECTION (SECTION III) TO MAIN TO MAIN PIN-5 VIDEO CH FREQUENCY LOCK (L) PIN- PIN-4 TV (H)/VCR (L) R113 DTS CS (H) PIN- PIN-3...
  • Page 180 NOTE: IMPORTANT SAFETY NOTICE: NOTE: NOTE: THE PARTS MARKED INDICATE THAT A TRIMMING THE FOLLOWING PARTS ON THE Hi-Fi AUDIO C.B.A. ARE NOT SUPPLIED SEPARATELY. COMPONENTS IDENTIFIED BY THE SIGN HAVE FOR SCHEMATIC AND C.B.A. DIAGRAM NOTES, PLEASE ORDER AND REPLACE WITH CIRCUIT BOARD ASSEMBLY INSTEAD OF INDIVIDUAL PARTS.
  • Page 181 Hi-Fi AUDIO/VIDEO HEAD AMP SCHEMATIC DIAGRAM (D,E) NOTE: FOR SCHEMATIC AND C.B.A. DIAGRAM NOTES, REC VIDEO SIGNAL PB VIDEO SIGNAL REC AUDIO SIGNAL PB AUDIO SIGNAL CYLINDER SERVO REFER TO BEGINNING OF SCHEMATIC SECTION (SECTION III). TO MAIN P3501 P3001- UNSW +5V (VIDEO) P3001- Hi-Fi HEAD SW...
  • Page 182 Hi-Fi AUDIO/VIDEO HEAD AMP C.B.A. VEPS5003A1 CYLINDER UNIT MAIN C.B.A. MODEL MARK P3502 P3501 P3001 MODEL NUMBER P4201 C.B.A. NUMBER MARK PV-4601 A UHF/VHF TUNER/TV VEPS6001GA12 PV-4601 B AUDIO DEMODULATOR UNIT VEPS6001GA1 PV-4601-K IN L CH VEPS6001HA1 PV-4651 VEPS6002GA12 VIDEO PV-4651-K...
  • Page 183: Schematic Diagram

    MAIN I (POWER SUPPLY/SYSTEM CONTROL/SERVO/OPERATION) /POWER SUPPLY SCHEMATIC DIAGRAM (A,C,D,E) NOTE: IMPORTANT SAFETY NOTICE: FOR SCHEMATIC AND C.B.A. DIAGRAM NOTES, COMPONENTS IDENTIFIED BY THE SIGN HAVE CAPSTAN SERVO CYLINDER SERVO REFER TO BEGINNING OF SCHEMATIC SECTION (SECTION III). SPECIAL CHARACTERISTICS IMPORTANT FOR SAFETY. WHEN REPLACING ANY OF THESE COMPONENTS, POWER SUPPLY C.B.A.
  • Page 184 MAIN II (SIGNAL PROCESS/AUDIO) SCHEMATIC DIAGRAM (A,C,D,E) REC VIDEO SIGNAL PB VIDEO SIGNAL REC AUDIO SIGNAL PB AUDIO SIGNAL CYLINDER SERVO NOTE: FOR SCHEMATIC AND C.B.A. DIAGRAM NOTES, REFER TO BEGINNING OF SCHEMATIC SECTION (SECTION III). JK3001 J3201 J4401 J4402 L3201 Q4506 C3208...
  • Page 185 MAIN I (POWER SUPPLY/SYSTEM CONTROL/SERVO/OPERATION) /POWER SUPPLY SCHEMATIC DIAGRAM (B) NOTE: IMPORTANT SAFETY NOTICE: FOR SCHEMATIC AND C.B.A. DIAGRAM NOTES, COMPONENTS IDENTIFIED BY THE SIGN HAVE CAPSTAN SERVO CYLINDER SERVO REFER TO BEGINNING OF SCHEMATIC SECTION (SECTION III). SPECIAL CHARACTERISTICS IMPORTANT FOR SAFETY. WHEN REPLACING ANY OF THESE COMPONENTS, POWER SUPPLY C.B.A.
  • Page 186 (SIGNAL PROCESS/AUDIO) SCHEMATIC DIAGRAM (B) MAIN II REC VIDEO SIGNAL PB VIDEO SIGNAL REC AUDIO SIGNAL PB AUDIO SIGNAL CYLINDER SERVO NOTE: FOR SCHEMATIC AND C.B.A. DIAGRAM NOTES, REFER TO BEGINNING OF SCHEMATIC SECTION (SECTION III). JK3001 J3201 J4402 L3201 C3208 VIDEO AUDIO...
  • Page 187: Index Of Controls

    Index of Controls Remote Control Button VCR/TV COUNTER RESET SPEED POWER COUNTER POWER VCR/TV RESET SPEED PLAY REW/ FAST FORWARD/SEARCH PLAY STOP REC/TIME ZERO/1MIN SLOW PAUSE REWIND/ SEARCH STOP RECORD/TIME ZERO SEARCH/1 MINUTE SKIP ROTATE TO SELECT SLOW PAUSE MENU CLEAR PROG SELECT/SET WHEEL...
  • Page 188 Index of Controls Multi Function Display VCR Indicator Hi-Fi Indicator Appears when the VCR/TV When Hi-Fi audio is monitored or selector is set to VCR. played back, this indicator appears. Hi-Fi TIMER Power Indicator Timer Indicator This indicator lights This indicator lights when the VCR when power is turned on.
  • Page 189 One Time VCR Setup To Set Language, Channel and Clock When the VCR power is first turned on, the language select and channel auto set screen appear automatically followed by Turn TV on and VCR on. a prompt to set the clock. POWER Check list before you begin.
  • Page 190 To Replace Channels in Memory Example, if you have cable installed, etc. SET UP CHANNEL Push MENU to display the menu. ANTENNA SYSTEM : CATV AUTO SET COUNTER POWER VCR/TV RESET SPEED Rotate and push the Wheel PLAY to select SET UP CHANNEL REW/ SELECT : ROTATE WHEEL : PUSH WHEEL...
  • Page 191: On Screen Displays (Osd)

    On Screen Displays (OSD) Function & Channel Display Warning and Instruction Displays These displays will alert you to a missed operation or Whenever a function button provide further instructions. is pushed (PLAY, FF, etc.) or the channel is changed, a 4 second OSD will NO CH FOUND If no active channels are appear first in large and...
  • Page 192: Playback A Tape

    Playback a Tape Insert a cassette. Check list before you begin • VCR power comes on automatically. All connections are made. This indicator lights in the Our Vacation TV and VCR are plugged in. Multi Function Display. TV is turned on and set to the VCR channel (CH 3 or 4).
  • Page 193: Record On A Tape

    Record On a Tape Insert a cassette with record tab. Check list before you begin. • VCR power comes on All connections are made. automatically. VCR is Plugged in. TV is turned on and set to the VCR channel (CH3 or CH4). Push VCR CH STOP CH0 2...
  • Page 194: Selecting The Input Mode

    Selecting the Input Mode Push MENU to display the menu. MENU SET UP VCR Multi Function Display SET C LOCK SET UP CHANNEL Rotate and push the Wheel to select I D I OMA / LANGUE : ENGL I SH “SET UP VCR.”...
  • Page 195: Tape Operation

    Tape Operation Our Vacation Your VCR is equipped with several time Repeat Play saving features as well as convenient automatic functions which make tape You can set your VCR up to play a recording over and over. operation easier than ever. Push MENU to MENU display the menu.
  • Page 196: Copying Your Tapes (Dubbing)

    Copying Your Tapes (Dubbing) Connections you’ll need to make. Playing (Source) VCR Recording (Editing) VCR TV for Monitoring Audio In (R) Audio Out (R) CH3 or 4 Audio Out (L) Video In Video Out Audio In (L) To Monitor the Re-Recording Insert a pre-recorded tape into the Playing Turn the TV on and select its VCR channel...
  • Page 197: Timer Recording

    Timer Recording Push PROG to display Your VCR can be set up to do a recording DATE START STOP while you are away or otherwise occupied. the program screen. 7 FRI --:-- --:-- -- Up to 8 programs can be placed in TODAY memory.
  • Page 198 Cancel a Timer Recording: Recording is in progress Push the POWER button to release the VCR from timer mode. Push the STOP button within 10 seconds of pushing the POWER button to cancel the recording. The TIMER indicator goes out in the Multi- Function display. POWER Multi STOP...
  • Page 199 Timer Recording Using VCR Buttons A timer recording can be set up using the Hold down buttons on the VCR. If necessary, the clock REC/TIME. can also be set. DATE START STOP 7 FRI --:-- --:-- -- TODAY SELE CT START DATE Push FF to BY SELECT enter the...
  • Page 200: Special Vcr Features

    Special VCR Features VCR Lock Feature Check list before you begin. When activated, this feature prohibits all operations except for timer All connections are made. recording, and tape eject. This is useful to prevent misoperation and VCR is Plugged in. protect your VCR from curious children.
  • Page 201: Mts Broadcast/ Vhs Hi-Fi Stereo System

    MTS Broadcast/ VHS Hi-Fi Stereo System Check list before you begin The VCR is connected to a stereo TV, or a mono TV and stereo amp or receiver with speakers. The VCR and other components are plugged in and turned on. Connections In from Antenna to Make...
  • Page 202 With the proper audio mode setting, your VCR can: 1) record and playback an MTS stereo broadcast (main language) in stereo Hi-Fi. 2) record and playback a monaural broadcast (main language) or Second Audio Program (second language) on the Hi-Fi tracks for better quality monaural sound. 3) playback non Hi-Fi tapes in monaural.
  • Page 203 UHF/VHF TUNER/TV DEMODULATOR SCHEMATIC DIAGRAM (D,E) IMPORTANT NOTICE: TO MAIN P201 VIDEO SIGNAL AUDIO SIGNAL NOTE: FOR SCHEMATIC AND C.B.A. DIAGRAM NOTES, REFER PIN- VIDEO TP701 TP702 IF PARTS OF TUNER AND FS SECTION ARE TO BEGINNING OF SCHEMATIC SECTION (SECTION III) PIN- 3/4 CH REPLACED INDIVIDUALLY.

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Pv-4601 bPv-4601-kPv-4651Pv-4651-k