
V
V
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REDORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO
VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE
RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO
VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE
RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO
VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE
RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO CASSETTE RECORDER VIDEO
Contents
SECTION 1.
CONTROLS AND FUNCTIONS
...........................................................................................2
SECTION 2.
ELECTRICAL ADJUSTMENTS
2-1. SERVO CIRCUIT ADJUSTMENT METHOD...........................................................................................3
2-2. IF MODULE CIRCUIT ADJUSTMENT METHODS.................................................................................4
SECTION 3.
CIRCUIT OPERATION PRINCIPLES
3-1. POWER CIRCUIT.......................................................................................................................................6
3-2. KEY FEATURES OF VIDEO IC AND ITS RELATIVES..........................................................................8
3-3. RECORD AND PLAYBACK PROCESSING CIRCUIT ...........................................................................8
3-4. IF CIRCUIT OPERATION ........................................................................................................................12
3-5. NORMAL AUDIO SIGNAL PROCESSING(LA71501BM) ....................................................................15
3-6. Hi-Fi AUDIO SIGNAL PROCESSING(BH7804K)..................................................................................16
SECTION 4.
TROUBLESHOOTING FLOW CHART
4-1. POWER CIRCUIT.....................................................................................................................................19
4-2. PIF CIRCUIT..............................................................................................................................................21
4-3. LOGIC CIRCUIT .......................................................................................................................................23
4-4. SERVO-SYSCON CIRCUIT ....................................................................................................................24
4-5. AUDIO CIRCUIT (NORMAL) ...................................................................................................................32
4-6. AUDIO CIRCUIT (Hi-Fi)............................................................................................................................34
4-7. VIDEO CIRCUIT .......................................................................................................................................36
SECTION 5.
WAVEFORMS ON VIDEO CIRCUIT
................................................................................43
SECTION 6.
µ-COM PORT
..............................................................................................................................46
SECTION 7.
VOLTAGE CHARTS
................................................................................................................50
SECTION 8.
SERVICE MODE
.......................................................................................................................56
SECTION 9.
CIRCUIT DIAGRAM
9-1. CONNECTION DIAGRAM.......................................................................................................................68
9-2. POWER CIRCUIT DIAGRAM..................................................................................................................69
9-3. SYSCON AND LOGIC CIRCUIT DIAGRAM..........................................................................................70
9-4. PIF CIRCUIT DIAGRAM ..........................................................................................................................71
9-5. IF/MPX MODULE CIRCUIT DIAGRAM..................................................................................................72
9-6. VIDEO/AUDIO CIRCUIT DIAGRAM.......................................................................................................73
9-7. Hi-Fi/PRE-AMP CIRCUIT DIAGRAM......................................................................................................74
SECTION 10.
COMPONENTS LOCATION GUIDE ON PCB BOTTOM VIEW
10-1. PCB MAIN ...............................................................................................................................................75
10-2. PCB IF MODULE....................................................................................................................................76
10-3. PCB LOGIC (DV-K
*
84W, DV-K
*
64W, DV-K
*
24W, DV-K8K4W, DV-K#44W, DV-K#04W,DV-K#84W, DV-K#B4W) .................77
SECTION 11.
DISASSEMBLY
11-1. PACKING ASS’Y ....................................................................................................................................79
11-2. FRONT PANEL ASSEMBLY.................................................................................................................80
11-3. INSTRUMENT DISASSEMBLY ............................................................................................................82
SECTION 12.
ELECTRICAL PARTS LIST
...............................................................................................91
SECTION 13.
OPTION TABLE
.....................................................................................................................107
SECTION 14.
SERVICE JIG CONNECTION METHODS
................................................................114
VIDEO CASSETTE RECORDER
Содержание DV-K*04W Series
Страница 71: ...CIRCUIT DIAGRAMS 68 SECTION 9 CIRCUIT DIAGRAM 9 1 CONNECTION DIAGRAM DV K884W K484W K284W ...
Страница 72: ...CIRCUIT DIAGRAMS 69 9 2 POWER CIRCUIT DIAGRAM DV K884W K484W K284W ...
Страница 73: ...CIRCUIT DIAGRAMS 70 9 3 SYSCON AND LOGIC CIRCUIT DIAGRAM ...
Страница 74: ...CIRCUIT DIAGRAMS 71 9 4 PIF CIRCUIT DIAGRAM DV K884W K484W K284W ...
Страница 75: ...CIRCUIT DIAGRAMS 72 9 5 IF MPX MODULE CIRCUIT DIAGRAM DV K884W K484W K284W ...
Страница 76: ...CIRCUIT DIAGRAMS 73 9 6 VIDEO AUDIO CIRCUIT DIAGRAM DV K884W K484W K284W ...
Страница 77: ...CIRCUIT DIAGRAMS 74 9 7 Hi Fi PRE AMP CIRCUIT DIAGRAM DV K884W K484W K284W ...
Страница 78: ...DISASSEMBLY 79 SECTION 11 DISASSEMBLY 11 1 PACKING ASS Y ...
Страница 79: ...DISASSEMBLY 80 11 2 FRONT PANEL ASSEMBLY ...