Hitachi VT-FX760E(NA)(UKN) Videorecorder
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Modell:
VT-FX760E(NA)(UKN)
Datum:
1998
Kategorie:
Gruppe:
Beschreibung:
Dokumenttyp:
Serviceanleitung
Seiten:
88
Größe:
14.74 Mbytes (15460301 Bytes)
Sprache:
english
Revision:
Dokument-ID:
4806E
Datum:
1998 06 01
Qualität:
Gescanntes Dokument, alles ist lesbar.
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2017 04 16
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Information
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