TABLE
OF
CONTENTS
SERVICE
NOTE
1.
HOW
TO
RETURN
THE
PINCH
ROLLER,
GUIDE
ROLLER
AND
ELEVATOR
CAM
TO
STOP
MODE
2.
HOW
TO
RETURN
A
TAPE
INTO
CASSETTE
HALF
.....
ssiuoadoesvnasecanesd
tees
osteaeees
3:
HOW
TO
REMOVE
A
CASSETTE.FROM
A
MACHINE
JF
A
CASSETTE
IS
LEFT
IN
>.
A
MACHINE
IN
TROUBLE
..............c:eeceeeees
4.
-.,.HOW
TO
REMOVE
DRUM
ASSEMBLY
..........
5.
HOW
TO
REPLACE
A
ROTARY
os
:
UPPER
DRUM.
..........::0ccsecsseecseeeeeenseeseeetees
5-1.
HOW
TO
REMOVE
A
ROTARY
UPPER
DRUM
...
5-2.
_
HOW
TO
ATTACH
NEW
ROTARY
UPPER
DRUM........ss00ee000
cnoanciue
aes
1.
GENERAL
Getting
Started
Unpacking
(0.00.2
ccccceeeeeeceeeeeeee
sa
deawestababverabebeal
Setting
up
the
remote
commander
................
San
ene
HOOKUPS
72:63
soci
end
ecande
cde
thsndssccagedenw
sseascomesssncesecee’s
Setting
the
clock.........
jisteddecee
sd
jtscties
Moc
aetdes
nueasersunsee
Selecting
a
language
......:.......s:seeceseceecenesenersasenens
Presetting
channels...,...
aia
ceneceaitesete
108
«
nveedeaevees
ea
aweavs
Playing
4
tape
...........ccseeeee
esos
Stewed
i
vaigeso
aes
esetenienss
Recording
TV
programs................
bageged
feadusdhesess
eteee
Playing/searching
at
various
speeds
.....cccccseesseees
ee
Checking/changing/cancelling
timer
setting
iaduetineoersess
Recording
stereo
and
bilingual
programs
..................5
Adjusting
the
picture
.............c.seseeeeeeees
adiseeroeuversts
Recording
TV
programs
using
the
timer
Changing
menu
options
..............cscecssecsceceeeeeveeeees
Editing
with
another
VCR
...........cccecsecseseseeeeensunenes
Additional
Information
Index
to
parts
and
controls
..........
scsudvxGagesesecasenassectt
2.
DISASSEMBLY
2-1.
REMOVAL
OF
FRONT
PANEL
ASSY
.............
2-2,
|
REMOVAL
OF
POWER
BLOCK
...............064
2-3.
|
REMOVAL
OF
RP-195
BOARD
and
MA-248
BOARD
..........cseceeseecnsceeeeeeeraeeneens
2-4.
|
REMOVAL
OF
MECHANISM.
...............200000
2-5.
|
CIRCUIT
BOARDS
LOCATION
2-6.
INTERNAL
VIEWG............cccccsccseceeeeeeeeeneens
3.
BLOCK
DIAGRAM
3-1.
OVERALL
BLOCK
DIAGRAM
.................000008
3-2,
VIDEO
BLOCK
DIAGRAM
..............00c0eceeeee
3-3.
SERVO/SYSTEM
CONTROL
BLOCK
DIAGRAM
3-4.
AUDIO
BLOCK
DIAGRAM
...........:.c:0:ceeeeee
3-5.
|
TUNER
BLOCK
DIAGRAM
...............::0c:eeeee
3-6.
POWER
BLOCK
DIAGRAM
............:000eceeseees
4.
PRINTED
WIRING
BOARDS
AND
SCHEMATIC
DIAGRAMS
4-1.
FRAME
SCHEMATIC
DIAGRAM
4-2,
PRINTED
WIRING
BOARDS
AND
SCHEMATIC
DIAGRAMS
.............c00cceeeeeeeees
MA-248
(MAIN),
RP-195
(HEAD
AMP),
DM-45
(TRANSLATION)
_
PRINTED
WIRING
BOARDS.
..........
ee
Caer
ree
recesecseres
oe
oe
RP-195
(HEAD
AMP)
SCHEMATIC
DIAGRAM
...4-7
MA-248
(VIDEO)
SCHEMATIC
DIAGRAM.
.....:
4-10
_MA-248
(SERVO,
SYSTEM
CONTROL),
SW-268
(SWITCH),
DM-45
(TRANSLATION)
»
SCHEMATIC
DIAGRAMS.
...............
4-13
6
MA-248
(AUDIO)
SCHEMATIC
DIAGRAM
.......
4-16
Sd
MA-248
(TUNER)
SCHEMATIC
DIAGRAM
......
4-19
MA-248
(DC
POWER)
SCHEMATIC
DIAGRAM
4-21
6
POWER
BLOCK
(SR700)
6
PRINTED
WIRING
BOARD
AND:
SCHEMATIC
DIAGRAM
...........0000
4-23
7
POWER
BLOCK
(HS721SF)
__
7
PRINTED
WIRING
BOARD
AND
SCHEMATIC
DIAGRAM
.............0005-
4-25
5.
REPAIR
PARTS
LIST
5-1.
EXPLODED
VIEWS
.............
ieaeN
aaa
5-1
5-1-1;
FRONT
PANEL
ASSY.........
Fe
wetete
dy
As
5-1
1-1
5-1-2.
MAIN
CHASSIS
ASSEMBLY
...........-...s0000000-
5-2
1-1
5-1-3.
VHS
MECHANISM
DECK
ASSEMBLY-1.
.........
5-3
1-2
5-1-4,
VHS
MECHANISM
DECK
ASSEMBLY-2.
.........
5-4
1-7
5-1-5.
VHS
MECHANISM
DECK
ASSEMBLY-3
.........
5-5
1-7
5-1-6.
VHS
MECHANISM
DECK
ASSEMBLY-4
.........
5-6
1-8
5-2.
ELECTRICAL
PARTS
LIST
............cceecereeceeeee
5-7
1-10
1-11
6.
INTERFACE,
IC
PIN
FUNCTION
1-12
DESCRIPTION
1-13
6-1.
SYSTEM
CONTROL
—
MECHANISM
BLOCK
1-13
INTERFACE
(MA-248
board
IC501)
......ssseseeees
6-1
1-14
6-2.
|
SYSTEM
CONTROL
—
SERVO
PERIPHERAL
_
1-14
CIRCUIT
INTERFACE
(MA-248
board
IC501)......6-1
1-16
6-3.
SYSTEM
CONTROL
—
SYSTEM
CONTROL
1-16
PERIPHERAL
CIRCUIT
INTERFACE
(MA-248
boatd
IC501)
o..eeeeceeeeeeeceseenscesseseees
6-2
1-18
6-4.
|
SYSTEM
CONTROL
AND
RF
MODULATOR
—
INPUT
SELECTION
BLOCK
INTERFACE
(MA-248
board
IC501)
.....eeeeeeceeceeeeseeenececeeeee
6-2
2-1
6-5.
SYSTEM
CONTROL
—
2-1
VIDEO
BLOCK
INTERFACE
(MA-248
board
IC501)
©
.....ccscceeeeceeeeseseeeeeeeeees
6-2
2-2
6-6.
SYSTEM
CONTROL
—
2-3
AUDIO
BLOCK
INTERFACE
2-3
(MA-248
board
IC501)
o....eeeeeeseeeeeteeeeeee
eee
e
62
2-4
6-7.
SERVO/SYSTEM
CONTROL
MICROPROCESSOR
M37775M5H311GP
(MA-248
board
IC501)
........
6-3
3-1
7.
ADJUSTMENTS
3-4
7-1.
MECHANICAL
ADJUSTMENTS
...........00...00008
7-1
7-2,
ELECTRICAL
ADJUSTMENTS............0000cccccee-
7-1
3-7
2-1.
PREPARATION
BEFORE
ADJUSTMENT
.........
7-1
3-9
2-1-1.
Equipment
Required............ccccccccccccsssceeesssees
7-1
3-11
2-1-2.
Equipment
Connection
..............cccseseseceseveeseeees
7-1
3-13
2-1-3.
Input
Signal
Check
..........cccccccscesseceesseeeesseees
7-1
2-1-4.
Alignment
Tape
.............cceecseseeee
nee
ecesevenneeens
7-1
2-1-5.
Input/Output
Levels
and
Impedance
...............4..
7-2
2-1-6.
Adjustment
Sequence
.............cceeceeseeeeceseneeeges
7-2
41
2-2.
POWER
SUPPLY
CHECK
....0......scccccceeeenseeeees
72
2-3.
SERVO
SYSTEM
CHECK
............ccceesesseeeeeees
7-3
4-3
2-3-1.
RF
Switching
Position
Check
(MA-248,
RP-195
Boards)
......0.-..ccseseeeseeececeee
7-3
2-4.
VIDEO
SYSTEM CHECKS
.........ceeeeceeeeeeeeeee
7-3
4-4
2-4-1.
X'tal
OSC
Check
(RV-40
Board)
........cccccccceeeeeees
7-3
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