JVC HR-DX20EM Videorecorder
Hersteller:
Modell:
HR-DX20EM
Datum:
1991
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DISASSEMBLY AND MECHANISM ADJUSTMENTS 1.1 DISASSEMBLY ............................................................................................1-1 1.2 MECHANISM ADJUSTMENTS ....................................................1-4 1.3 MAIN MECHANISM PARTS ..........................................................1-5 1.4 INSPECTION AND MAINTENANCE ........................................1-7 1.5 MAIN PARTS REMOVAL AND REPLACEMENT .... 1 -8 2. ELECTRICAL ADJUSTMENTS 2.1 PREPARATION ............................................................................................2-1 2.2 SWITCHING REGULATOR CIRCUIT ......................................2-3 2.3 TIMER CIRCUIT ..........................................................................................2-3 2.4 SERVO CIRCUIT ........................................................................................2-4 2.5 VIDEO CIRCUIT ..........................................................................................2-5 2.6 AUDIO CIRCUIT ..........................................................................................2-8 2.7 TUNER/IF CIRCUIT ..................................................................................2-9 3. CHARTS AND DIAGRAMS 3.1 CIRCUIT BOARD AND LOCATION ..........................................3-1 3.2 GENERAL INFORMATION ................................................................3-2 3.3 BOARD INTERCONNECTIONS ....................................................3-3 3.4 AUDIO BLOCK DIAGRAM ................................................................3-5 3.5 SERVO BLOCK DIAGRAM ..............................................................3-7 3.6 VIDEO BLOCK DIAGRAM ................................................................3-9 3.7 SYSTEM BLOCK DIAGRAM ..........................................................3-11 3.8 PRE/REC BLOCK DIAGRAM ..........................................................3-13 3.9 SWITCH REGULATOR AND REGULATOR (MAIN) SCHEMATIC DIAGRAMS ..................................................................3-15 3.10 SWITCHING REGULATOR CIRCUIT BOARD ................3-17 3.11 SERVO SCHEMATIC DIAGRAM ................................................3-19 3.12 SERVO (MAIN) CIRCUIT BOARD ............................................3-2 1 3.13 AUDIO SCHEMATIC DIAGRAM ..................................................3-23 3.14 AUDIO (MAIN) CIRCUIT BOARD ..............................................3-25 3.15 TUNER/IF (MAIN) SCHEMATIC DIAGRAM ....................3-2 7 3.16 TUNER/IF (MAIN) CIRCUIT BOARD ......................................3-29 Section Title Page 3.17 MECHACON CTL SCHEMATIC DIAGRAM ........... 3-31 3.18 MECHACON (MAIN) CIRCUIT BOARD ............... 3-33 3.19 DECK TERMINAL. CASS. HOUSING, CAPSTAN MDA AND LOADING MDA SCHEMATIC DIAGRAMS .... 3-35 3.20 DECK TERMINAL, LOADING MDA, CASS. HOUSING, A/CTL HEAD AND FULL ERASE HEAD CIRCUIT BOARDS ...................................................... 3-36 3.21 MAIN (AUDIO, SERVO, VIDEO. MECHACON, TUNER/IF) CIRCUIT BOARD ............................. 3-37 3.22 VIDEO UNIT AND VIDEO SCHEMATIC DIAGRAMS 3-39 3.23 VIDEO (MAIN) AND VIDEO UNIT CIRCUIT BOARDS 3-41 3.24 TIMER/DISPLAY/SWITCH SCHEMATIC DIAGRAM 3-43 3.25 TIMER/DISPLAY/SWITCH CIRCUIT BOARD ......... 3-45 3.26 PRE/REC SCHEMATIC DIAGRAM ....... .............. 3-47 3.27 PRE/REC CIRCUIT BOARD ............................... 3-49 3.28 RF Converter SCHEMATIC DIAGRAM ............ 3-50 4. EXPLODED VIEWS AND PARTS LIST 4.1 PACKING ASSEMBLY <M1> .......................... 4-1 4.2 CABINET ASSEMBLY <M2> .......................... 4-2 4.3 CHASSIS ASSEMBLY <M3> .......................... 4-3 4.4 MECHANISM ASSEMBLY <M4> .................... 4-4 5. ELECTRICAL PARTS LIST SWITCH REGULATOR BOARD ASSEMBLY <01 > 5-1 MAIN BOARD ASSEMBLY <03> <43> ....................5-2 VIDEO UNIT BOARD ASSEMBLY <05> ......................5-9 AUDIO/CONTROL HEAD BOARD < 12> ........................5-11 TIMER/DISPLAY/SW BOARD ASSEMBLY <21 > 5-11 UPPER DRUM BOARD <41 > ..................................................5-12 DECK TERMINAL BOARD ASSEMBLY <51 > ..........5-12 LOADING MDA BOARD ASSEMBLY <55> ..............5-12 CASSETTE HOUSING BOARD <56> ..............................5-12 FULL ERASE HEAD BOARD <61 > ....................................5-12 6. TECHNICAL INFORMATIONS 6.1 CPU PIN FUNCTIONS ..................................... 6-1

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Serviceanleitung
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69
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Dokument-ID:
82260
Datum:
1991 08 01
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