JVC - HR-DX20EM - Video cassette recorder
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Equipment:
HR-DX20EM
Date:
1991
Category:
Group:
Sub Group:
Information
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
1 Manual
Service manual
Manual type:
Service manual
Pages:
69
Size:
11.3 MB
Language:
english
Revision:
Manual-ID:
82260
Date:
August 1991
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
May 15, 2017
MD5:
1b111681-fe67-1a64-6656-0a20b66b2aa4
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569