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Hitachi VT-FX760E(NA)(UKN) Videorecorder
Hersteller:
Hitachi
Modell: VT-FX760E(NA)(UKN)
Datum: 1998
Kategorie: Audio, Video, TV, Multimedia
Gruppe: Videorecorder
Beschreibung:
Informationen:
                                    

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Dokumenttyp: Serviceanleitung Hitachi-8897-Manual-Page-1-Picture
Seitenanzahl: 88
Dateigröße: 14.74 Mbytes (15460301 Bytes)
Sprache: Englisch
Revision:
Dokument-ID/Nummer: 4806E
Datum: 01 Juni 1998
Qualität: Gescanntes Dokument, alles ist lesbar.
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MD5: d9e9e2a8619aef54205fcc2176d48861
Downloads: 208 seit dem 16 April 2017
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CHAPTER 1
 GENERAL INFORMATION
 J
SPECIFICATIONS........................................................
 1-1
COMPARISON OF FEATURES...................................
 1-2
COMPARISON OF MAIN CONTROL ICs.....................
 1-3
TIPS FOR
SERVICING.................................................
 1-4
TROUBLE DISPLAY FUNCTION.................................
 1-4
How to Remove the Cassette when a
Malfunction Has Occurred in the Mechanism...............
 1-5
Instructions on Use and Description of New Functions ■ 1-6
CHAPTER 2
 DISASSEMBLY
- VT-FX75xE/FX76xE/MX730E -
1.Before Starting Disassembly...................................
2.Disassembly M
ethod...............................................
Parts Hierarchy C
hart................................................
Disassembly Procedure Diagrams............................
2-1 .Top cover, front panel, rear panel, RJK board
and US-FL mechanism............................................
2-2.Cassette door and buttons.................................
2-3.STL or LED
board...............................................
2-4.Front frame and LCD board................................
2-5.US mechamsm/MAS board assembly
and N&A or A2
board..............................................
2-6.Separation of MAS board from US mechanism ■■■
2-7.Procedure to remove only the US mechanism ■■■■
- VT-FX770E -
1.Before Starting Disassembly...................................
2.Disassembly M
ethod...............................................
Parts Hierarchy C
hart................................................
Disassembly Procedure Diagrams.............................
2-1 .Top cover, front panel, rear panel, bottom cover,
RJK board and US-FL mechanism...........................
2-2.Cassette door and buttons.................................
2-3.Front frame, LCJ and FST board.........................
2-4.NCM and N&A board...........................................
2-5.US mechanism/MAS board assembly.................
2-6.Separation of MAS board from US mechanism ■■■■
2-7.Procedure to remove only the US mechanism....
Cautions When Reinstalling the US Mechanism.........
■
•
■
■
2-1
2-1
2-1
2-2
■
■
■■2-2
2-2
2-3
2-3
• 2-3
■ 2-4
2-4
2-5
2-5
2-5
2-6
2-6
2-6
2-7
2-7
2-7
2-8
2-8
2-9
ELECTRIC CICUIT ADJUSTMENT AND
CHAPTER 3
TROUBLE DISPLAY
 ________
Service
Position..............................................................
3-1
- VT-FX75xE/FX76xE/MX730E -
1.Servicing position during electrical adjustment.......... 3-1
2.Servicing positions when repairing and
checking
circuits.........................................................
3-1
3.Be careful of electric
shocks....................................... 3-1
Service
Position..............................................................
3-2
- VT-FX770E -
1.Servicing position during electrical adjustment..........3-2
2.Servicing positions when repairing and
checking
circuits.........................................................
3-2
3.Be careful of electric
shocks........................................ 3-2
Electrical Circuit
Adjustment........................................... 3-3
1.Test equipment/jigs necessary for adjustment........... 3-3
2.Cautions on
adjustment.............................................. 3-3
3.Tips.for
adjustment.....................................................3-3
4.Connections of test
equipment................................... 3-3
5.Test.Points and Adjustment
points............................. 3-4
6.Servo Circuit
Adjustments.......................................... 3-5
6-1.Switching point
adjustment.....................................3-5
6-2.X-value
adjustment................................................. 3-5
6-3.Vertical jitter
adjustment......................................... 3-6
6-4.Forward slow tracking preset adjustment...............3-6
6-5.Reverse slow tracking preset adjustment...............3-6
7.Audio Circuit
Adjustment............................................ 3-7
7-1.Hi-Fi.audio playback level
check............................ 3-7
7-2.E-E audio level
check............................................. 3-7
8.Cylinder Rotation Accumulated
Hours of Usage
Display.............................................. 3-7
9.List.of Data in EEPROM and Initial Settings...............3-8
10.List of Hidden
Commands........................................ 3-8
10-1 .Mode setting commands during adjustment......... 3-8
10-2.EEPROM initialization commands........................3-8
H.Coution When Handling IC4302 (NAVI EEPROM)-- 3-8
12.Initial settings of
IC903(EEPROM)........................... 3-9
13.Caution When Replacing IC903(EEPROM).............3-9
TROUBLE DISPLAY FUNCTION.................................3-10
Troubleshooting According to Malfunction Display......3-11
CHAPTER 4
 EXPLODED VIEWS
 ]
1.CABINETS ECTION
.................................................... 4-1
2.US-MECHA NISM (TOP VIEW) SECTION................... 4-3
3.US-MECHA NISM (BOTTOM VIEW) SECTION........... 4-4
4.US-FL MEC HANISM
SECTION................................... 4-5
CHAPTER 5
 REPLACEMENT PARTS LIST
 ]
1.MECHANIS M PARTS L IS T
.........................................5-1
2.ELECTRICS L PARTS LIS T
......................................... 5-2
CHAPTER 6
SCHEMATIC, CIRCUIT BOARD AND BLOCK
DIAGRAMS AND MICROPROCESSOR PIN
FUNCTION TABLES
INTERNAL WIRING
DIAGRAM...................................... 6-1
CONNECTION
DIAGRAM.............................................. 6-2
LCD DISPLAY (LCD)
[EXCEPT FOR FX770E].................................. c M
/lfo 47
SHUTTLE SWITCH (STL)
 SCHEMATIC B0ARD
[FOR FX750E(UKN)/FX760E] ....—
 ..... ^ A p / ^ 8
LCD/JACK (LCJ) [FOR FX770E]........................ 6-5 / 6-49
FRONT SHUTTLE (FST) [FOR FX770E] ........... 6-6 / 6-49
CYLINDER MOTOR............................................
6-7/ -
CAPSTAN MOTOR.............................................
6-7/ -
MAIN1
(MAS)......................................................
6-9/6-2
LED (LED) [FOR FX765E]............................... 6-10 /
6-48
MAIN2
(MAS)....................................................
6-12/6-27
REAR JACK (RJK)...........................................
6-15/ 6-45
NICAM (N&A) [EXCEPT FOR VPS].................. 6-17/ 6-45
A2 (A2) [FOR V
PS]........................................... 6-18/ 6-47
TAPE NAVIGATION..........................................
6-19 / 6-23
WAVEFORMS
SERVO
WAVEFORMS................................................ 6-8
Y/CHROMA WAVEFORMS.......................................... 6-8
BLOCK DIAGRAMS
MAIN
CONTROL.........................................................
6-51
SERVO........................................................................
6-53
VIDEO.........................................................................
6-55
POWER
SUPPLY....................................................... 6-57
AUDIO.........................................................................
6-59
MICROPROCESSOR PIN FUNCTION TABLES........6-6
Hitachi-8897-Manual-Page-1-Picture


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