Equipment information
Hitachi VT-FX630AW Video cassette recorder
Manufacturer:
Image 1 of 1
If you have any other photos or manuals for the
Hitachi VT-FX630AW you can upload the files here .
Model:
VT-FX630AW
Date:
1998
Category:
Group:
Description:
Manual Type:
Service Manual
Pages:
67
Size:
4.62 Mbytes (4844935 Bytes)
Language:
english
Revision:
Manual-ID:
4803E
Date:
1998 05 01
Quality:
Scanned document, all readable.
Upload date:
2017 04 16
MD5:
da6c5afd3f5364de382d6a7e66406fe9
Downloads:
938
Information
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 ... 7-2
Troubleshooting the Switching R egulator ... 7-6