Geräte Informationen

Hitachi VT-FX633AW Videorecorder
Hersteller:
Hitachi
Modell: VT-FX633AW
Datum: 1998
Kategorie: Audio, Video, TV, Multimedia
Gruppe: Videorecorder
Beschreibung:
Informationen:
                                    

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Dokumenttyp: Serviceanleitung Hitachi-8896-Manual-Page-1-Picture
Seitenanzahl: 67
Dateigröße: 4.62 Mbytes (4844935 Bytes)
Sprache: Englisch
Revision:
Dokument-ID/Nummer: 4803E
Datum: 01 Mai 1998
Qualität: Gescanntes Dokument, alles ist lesbar.
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CHAPTER 1 GENERAL INFORMATION
C O N TE1.
Specifications......................................................
2. Comparison with Previous M o d e l.....................
3. Comparison of Main Control IC s.......................
4. Tips for S
ervicing................................................
4-1. Trouble Display Function..............................
4-2. How to Remove the Cassette when a
Malfunction Has Occurred in the Mechanism ■
4-3. Instructions on U se.......................................
CHAPTER 2
 DISASSEMBLY
1-1
■
 1-2
■1-3
1-4
1-4
1-5
1-6
1. Before Starting
Disassembly........................................ 2-1
2. Disassembly M
ethod..................................................... 2-1
Parts Hierarchy C h a
rt................................................... 2-1
Disassembly Procedure Diagrams...............................2-2
2-1. Top cover, front panel, rear panel
and US-FL m echanism .................................... 2-2
2-2. Cassette door and b u tton
s..................................... 2-2
2-3. LED b o a rd
................................................................2-3
2-4. Front piece and LCD board or LED board.............2-3
2-5. US mechanism/MAS board assem bly................... 2-3
2-6. Separation of MAS board from US mechanism ■■■■ 2-4
2-7. Procedure to remove only the US mechanism..... 2-4
3. Cautions When Reinstalling the US M echanism ....... 2-5
CHAPTER 3
 ELECTRIC CIRCUIT ADJUSTMENT
Service Position
1. Servicing position during electrical adjustm
ent...........3-1
2. Servicing positions when repairing
and checking c irc u its
..................................................3-1
2-1. Procedure to set the LCD and LED
board to the servicing
positions................................. 3-1
2-2. Procedere to set the MAS board to
the service
position..................................................... 3-1
3. Be careful of electric sh
ocks........................................ 3-1
Electrical Circuit Adjustment
1. Test equipment/jigs necessary for adjustment............3-2
2. Cautions on adjustm
ent................................................3-2
3. Tips for adjustm
ent....................................................... 3-2
3-1. Procedure to reset the main m icroprocessor....... 3-2
3-2. Procedure to switch off the blue
background fu nctio n
................................................... 3-2
3-3. Procedure to obtain the EP head playback mode
(X-value adjustment test m
ode)................................. 3-2
4. Connections of test equipm
ent.................................... 3-2
5. Test Points and Adjustment p o in ts
..............................3-3
N TS
6. Servo Circuit
Adjustments........................................
6-1. Switching point adjustment.................................
6-2. X-value
adjustment.............................................
6-3. Vertical jitter adjustm
ent....................................
6-4. Forward slow tracking preset adjustm ent........
6-5. Reverse slow tracking preset adjustment........
7. Audio/MTS Circuit Adjustm ents..............................
7-1. Hi-Fi audio playback level ch e ck.......................
7-2. MTS input level adjustm ent................................
8. Cylinder Rotation Accumulated Hours of
Usage D isplay..............................................
9. List of Data in EEPROM and Initial Settings..........
10. List of Hidden
Commands......................................
10-1. Mode setting commands during a djustm e nt-
10-2. EEPROM initialization commands...................
11. Initial Settings of IC903(EEPROM).......................
12. Caution When Replacing IC903(VCR EEPROM)
■3-4
•3-4
■3-4
■3-5
■3-5
■3-5
■3-6
•3-6
■3-6
-3-6
•3-7
■3-7
■3-7
-3-7
•3-8
■3-8
CHAPTER 4
 EXPLODED VIEWS
 )
1. CABINET SECTION
..................................................... 4-1
2. US-MECHANISM (TOP VIEW) SECTION.................. 4-2
3. US-MECHANISM (BOTTOM VIEW) SECTION..........4-3
4. US-FL MECHANISM
SECTION................................... 4-4
CHAPTER 5
 REPLACEMENT PARTS LIST
 ]
1. MECHANIS M PARTS L IS T
......................................... 5-1
2. ELECTRIC/L PARTS L IS T
..........................................5-2
CHAPTER 6
SCHEMATIC, CIRCUIT BOARD AND
BLOCK DIAGRAMS
|
J
Schematic and circuit board diagrams
CONNECTION DIAGRAM
................................................6-1
SCHEM ATIC/CIRCUIT
LCD DISPLAY[LCD] (For FX633AW )................ 6-2 / 6-18
LCD DISPLAY GRID T A B LE ..............................6-3 / -
LED[LED] (For FX630AW )..................................
6-3 / 6-18
CYL. MOTOR DRIVE..........................................
6-4 / -
CAPSTAN
MOTOR..............................................6-4 / -
MECHANISM SENSOR[MAS]............................6-5 / 6-22
MAIN CONTROL[MAS]....................................... 6-6
/ 6-22
LED[LED] (For FX633AW )..................................
6-7 / 6-19
MTS/JACK[MAS].................................................
6-8 / 6-22
PRE AMP/FM AU D IO [M AS]...............................6-10
/ 6-22
LUMA/CHROMA,LINEAR AUDIO[MAS]............6-14 / 6-22
SWITCHING REGULATOR[MAS]..................... 6-1 6/6 -22
SERVO W
AVEFORMS................................................... 6-5
LUMA/CHROMA W AVEFORM S................................... 6-13
Block diagrams
1.
 MAIN C O N TRO
L.................................................... 6-30
2.
 SE R VO
....................................................................
6-32
3.
 A U D IO
.....................................................................
6-34
4.
 VIDEO...................................................................... 6-36
5.
 POWER SU
PPLY................................................... 6-38
Microprocessor Pin Function Tables
1. LCD Driver (IC
701)................................................. 6-40
2. M ainuP (IC901)
..................................................... 6-41
CHAPTER 7
 TROUBLE DISPLAY AND
TROUBLESHOOTING
.
Trouble Display
Function..............................................7-1
Troubleshooting According to Malfunction Display... 7-2
Troubleshooting the Switching R egulator................... 7-6
Hitachi-8896-Manual-Page-1-Picture


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