Telefunken-TV-CR210-C-TV-CR610-C-Service-Manual电路原理图.pdf

SERVICE MANUAL VIDEO CASSETTE RECORDER TVCR-210(C) TVCR-610(C) Sec. 1: Main Section I Specifications I Preparation for Servicing I Adjustment Procedures I Schematic Diagrams I CBAs I Exploded views I Parts List Sec. 2: Deck Mechanism Section I Standard Maintenance I Alignment for Mechanism I Disassembly/Assembly of Mechanism I Alignment Procedures of Mechanism I Deck Exploded Views I Deck Parts List PAL RadioFans.CN 收音机爱 好者资料库 MAIN SECTION VIDEO CASSETTE RECORDER TVCR-210(C)/TVCR-610(C) TABLE OF CONTENTS Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1-1 Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2-1 Standard Notes for Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3-1 Preparation for Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4-1 Cabinet Disassembly Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5-1 Electrical Adjustment Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6-1 Block Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7-1 Function Indicator Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7-7 Schematic Diagrams / CBAs and Test Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8-1 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9-1 Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10-1 IC Pin Function Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11-1 Lead Identifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12-1 Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13-1 Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14-1 Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15-1 Sec. 1: Main Section I Specifications I Preparation for Servicing I Adjustment Procedures I Schematic Diagrams I CBAs I Exploded Views I Parts List RadioFans.CN 收音机爱 好者资料库 1-1-1HG2E0SP SPECIFICATIONS Note: Nominal specs represent the design specs. All units should be able to approximate these some will exceed and some may drop slightly below these specs. Limit specs represent the absolute worst condition that still might be considered acceptable; In no case should a unit fail to meet limit specs. DescriptionUnitMinimumNominalMaximumRemark 1. Video 1-1. Video Output (PB)Vp-p0.81.01.2FL6A 1-2. Video Output (R/P)Vp-p0.81.01.2 1-3. Video S/N Y (R/P)dB4045 SP Mode, W/O Burst 1-4. Video Color S/N AM (R/P)dB3741SP Mode 1-5. Video Color S/N PM (R/P)dB3036SP Mode 1-6. Resolution (PB)Line230245SP Mode 2. Servo 2-1. Jitter Lowsec0.070.12SP Mode 2-2. Wow when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6) (4) Release the flat pack-IC from the CBA using twee- zers. (Fig. S-1-6) Caution: 1. The Flat Pack-IC shape may differ by models. Use an appropriate hot-air flat pack-IC desoldering machine, whose shape matches that of the Flat Pack-IC. 2. Do not supply hot air to the chip parts around the flat pack-IC for over 6 seconds because damage to the chip parts may occur. Put masking tape around the flat pack-IC to protect other parts from damage. (Fig. S-1-2) Top View OutIn Bottom View Input 5 10 Pin 1 Pin 1 FFC Cable Connector CBA * Be careful to avoid a short circuit. Fig. S-1-1 1-3-2NOTE_1 3. The flat pack-IC on the CBA is affixed with glue, so be careful not to break or damage the foil of each pin or the solder lands under the IC when removing it. With Soldering Iron: (1)Using desoldering braid, remove the solder from all pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig. S-1-3) (2)Lift each lead of the flat pack-IC upward one by one, using a sharp pin or wire to which solder will not adhere (iron wire). When heating the pins, use a fine tip soldering iron or a hot air desoldering machine. (Fig. S-1-4) (3) Bottom of the flat pack-IC is fixed with glue to the CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6) (4) Release the flat pack-IC from the CBA using twee- zers. (Fig. S-1-6) With Iron Wire: (1) Using desoldering braid, remove the solder from all pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig. S-1-3) (2) Affix the wire to a workbench or solid mounting point, as shown in Fig. S-1-5. (3) While heating the pins using a fine tip soldering iron or hot air blower, pull up the wire as the solder melts so as to lift the IC leads from the CBA contact pads as shown in Fig. S-1-5 (4) Bottom of the flat pack-IC is fixed with glue to the CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6) (5) Release the flat pack-IC from the CBA using twee- zers. (Fig. S-1-6) Note: When using a soldering iron, care must be taken to ensure that the flat pack-IC is not being held by glue. When the flat pack-IC is removed from the CBA, handle it gently because it may be damaged if force is applied. Fig. S-1-2 Hot-air Flat Pack-IC Desoldering Machine CBA Flat Pack-IC Tweezers Masking Tape Fig. S-1-3 Flat Pack-IC Desoldering Braid Soldering Iron Fig. S-1-4 Fine Tip Soldering Iron Sharp Pin Fig. S-1-5 To Solid Mounting Point Soldering Iron Iron Wire or Hot Air Blower 1-3-3NOTE_1 2. Installation (1)Using desoldering braid, remove the solder from the foil of each pin of the flat pack-IC on the CBA so you can install a replacement flat pack-IC more easily. (2)The “ I ” mark on the flat pack-IC indicates pin 1. (See Fig. S-1-7.) Be sure this mark matches the 1 on the PCB when positioning for installation. Then presolder the four corners of the flat pack-IC. (See Fig. S-1-8.) (3)Solder all pins of the flat pack-IC. Be sure that none of the pins have solder bridges. Instructions for Handling Semi-conductors Electrostatic breakdown of the semi-conductors may occur due to a potential difference caused by electro- static charge during unpacking or repair work. 1. Ground for Human Body Be sure to wear a grounding band (1M) that is prop- erly grounded to remove any static electricity that may be charged on the body. 2. Ground for Workbench Be sure to place a conductive sheet or copper plate with proper grounding (1M) on the workbench or other surface, where the semi-conductors are to be placed. Because the static electricity charge on cloth- ing will not escape through the body grounding band, be careful to avoid contacting semi-conductors with your clothing. Fig. S-1-6 Fine Tip Soldering Iron CBA Flat Pack-IC Tweezers Fig. S-1-7 Example : Pin 1 of the Flat Pack-IC is indicated by a mark. Fig. S-1-8 Presolder CBA Flat Pack-IC CBA Grounding Band Conductive Sheet or Copper Plate 1M 1M CBA 1-4-1HG240PFS PREPARATION FOR SERVICING How to Enter the Service Mode About Optical Sensors Caution: An optical sensor system is used for the Tape Start and End Sensors on this equipment. Carefully read and follow the instructions below. Otherwise the unit may operate erratically. What to do for preparation Insert a tape into the Deck Mechanism Assembly and press the PLAY button. The tape will be loaded into the Deck Mechanism Assembly. Make sure the power is on, connect TP507 (S-INH) to GND. This will stop the function of Tape Start Sensor, Tape End Sensor and Reel Sensors. (If these TPs are connected before plugging in the unit, the function of the sensors will stay valid.) See Fig. 1. Note: Because the Tape End Sensors are inactive, do not run a tape all the way to the start or the end of the tape to avoid tape damage. Fig. 1 TP507 S-INH Q504 Q505 1-5-1HG2E0DC CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart This flowchart indicates the disassembly steps to gain access to item(s) to be serviced. When reassembling, follow the steps in reverse order. Bend, route, and dress the cables as they were originally. 2. Disassembly Method (1): Identification (location) No. of parts in the figures (2): Name of the part (3): Figure Number for reference (4): Identification of parts to be removed, unhooked, unlocked, released, unplugged, unclamped, or desoldered. P=Spring, L=Locking Tab, S=Screw, CN=Connector *=Unhook, Unlock, Release, Unplug, or Desolder e.g. 2(S-2) = two Screws (S-2), 2(L-2) = two Locking Tabs (L-2) (5): Refer to “Reference Notes.” Reference Notes CAUTION: Locking Tabs (L-1) and (L-2) are fragile. Be careful not to break them. 1. Remove five Screws (S-2), two Screws (S-3): TVCR-210(C), three Screws (S-3): TVCR-610(C), and Screw (S-4). Then, slowly lift the VCR Chassis Unit (Deck Assembly, Jack CBA and Main CBA) up. 2. When reassembling, solder wire jumpers as shown in Fig. D5. 3. Before installing the Deck Assembly, be sure to place the pin of LD-SW on Main CBA as shown in Fig. D6. Then, install the Deck Assembly while aligning the hole of Cam Gear with the pin of LD- SW, the shaft of Cam Gear with the hole of LD-SW as shown in Fig. D6. ID/ LOC .No. PART REMOVAL Fig. No. REMOVE/*UNHOOK/ UNLOCK/RELEASE/ UNPLUG/DESOLDER Note 1Top CaseD17(S-1)- 2 Front Assembly D2*3(L-1),*4(L-2)- 3 VCR Chassis Unit D3-1 D3-2 5(S-2), (S-4), 2(S-3) - TVCR-210(C) 3(S-3) - TVCR-610(C) 1 4Jack CBAD4Desolder, (S-5)- 5 Deck Assembly D5 D6 2(S-6), Desolder2,3 6Main CBAD5*(L-3) - TVCR-610(C) - 7 Cylinder Shield D5(S-7)- 8 Jack Board TVCR-610(C) D5- (1) (2) (3) (4) (5) 5 Deck Assembly 4 Jack CBA 1 Top Case 2 Front Assembly 3 VCR Chassis Unit 6 Main CBA 7 Cylinder Shield 8 Jack Board TVCR-610(C) Fig. D1 (S-1) (S-1) (S-1) 1 Top Case 1-5-2HG2E0DC Fig. D2 (L-2) (L-1) 2 Front Assembly (L-2) (S-2) (S-2) (S-4) (S-2) (S-2) (S-3) (S-3) 3 VCR Chassis Unit Fig. D3-1 TVCR-210(C) Fig. D3-2 (S-2) (S-2) (S-4) (S-2) (S-2) (S-3) (S-3) (S-3) 3VCR Chassis Unit TVCR-610(C) Fig. D4 (S-5) 4 Jack CBA Desolder 1-5-3HG2E0DC (S-7) 5 Deck Assembly FE Head Cylinder Assembly ACE Head Assembly 7 Cylinder Shield 6 Main CBA (S-6) (S-6) From FE Head From Cylinder Assembly From ACE Head Assembly Lead with white stripe Lead with blue stripe Desolder from bottom Lead with blue stripe From Capstan Motor Assembly Lead connections of Deck Assembly and Main CBA Printing side TOP VIEW Fig. D5 8 Jack Board (L-3) TVCR-610(C) Fig. D6 6 Main CBA SW507 LD-SW LD-SW Pin Hole Hole Shaft Cam Gear 6 Main CBA 5 Deck Assembly Pin 1-6-1HG240EA ELECTRICAL ADJUSTMENT INSTRUCTIONS General Note: CBA is an abbreviation for Circuit Board Assembly. NOTE: 1.Electrical adjustments are required after replacing circuit components and certain mechanical parts. It is important to do these adjustments only after all repairs and replacements have been com- pleted. Also, do not attempt these adjustments unless the proper equipment is available. 2.To perform these alignment / confirmation proce- dures, make sure that the tracking control is set in the center position: Press either L5? or K button on the remote control unit first, then the PLAY button (Front Panel only). Test Equipment Required 1.Oscilloscope: Dual-trace with 10:1 probe, V-Range: 0.00150V/Div., F-Range: DCAC-20MHz 2.Alignment Tape (FL6A) Head Switching Position Adjustment Purpose: To determine the Head Switching position during playback. Symptom of Misadjustment: May cause Head Switching noise or vertical jitter in the picture. Reference Notes: Playback the Alignment tape and adjust VR501 so that the V-sync front edge of the CH1 video output wave- form is at the 6.5H1H (416s64s) delayed position from the rising edge of the CH2 head switching pulse waveform. Test pointAdj.PointModeInput J23(V-OUT) TP502(RF-SW) GND VR501 (Switching Point) (MAIN CBA) PLAY (SP) - Tape Measurement Equipment Spec. FL6AOscilloscope 6.5H1H (416s64s) Connections of Measurement Equipment Figure 1 Oscilloscope Main CBA J23 CH1 CH2 Trig. (+) GND TP502 EXT. Syncronize Trigger Point 1.0H CH1 CH2 Switching Pulse 6.5H+/-1H (416s+/-64s)V-Sync 0.5H BLOCK DIAGRAMS Servo/System Control Block Diagram HG2E0BLS1-7-1 CN504 CTL AMP OUT97 SENSOR CBA SENSOR CBA END-S ST-S Q504 Q505 CONTROL HEAD AC HEAD ASSEMBLY (DECK ASSEMBLY) TP501 CTL Comparison Chart of Models electrical components having such fea- tures are identified by the mark ! in the schematic diagram and the parts list. Before replacing any of these components, read the parts list in this manual carefully. The use of substitute replacement parts that do not have the same safety characteristics as speci- fied in the parts list may create shock, fire, or other hazards. Capacitor Temperature Markings Notes: 1. Do not use the part number shown on these draw- ings for ordering. The correct part number is shown in the parts list, and may be slightly different or amended since these drawings were prepared. 2. All resistance values are indicated in ohms (K=103, M=106). 3. Resistor wattages are 1/4W or 1/6W unless other- wise specified. 4. All capacitance values are indicated in F (P=10-6 F). 5. All voltages are DC voltages unless otherwise specified. 6. Electrical parts such as capacitors, connectors, diodes, ICs, transistors, resistors, switches, and fuses are identified by four digits. The first two dig- its are not shown for each component. In each block of the diagram, there is a note such as shown below to indicate these abbreviated two digits. Capacitors and transistors are represented by the following symbols. Mark Capacity change rate Standard temperature Temperature range (B) 10% 20C-25+85C (F)+30 - 80%20C-25+85C (SR) 15% 2