TABLE
OF
CONTENTS
SERVICE
NOTE
1.
HOWTO
RETURN
THE
PINCH
ROLLER,
GUIDE
ROLLER
AND
ELEVATOR
CAM
TO
STOP
MODE
--+----ss:se:eeeetees
4
2.
HOWTO
RETURN
A
TAPE
INTO
CASSETTE
HALE
-v-ssssssssssessssceesnsesnsessseceesnsesnseanennansnnseens
4
3.
HOWTO
REMOVE
A
CASSETTE
FROM
A
MACHINE
IF
A
CASSETTE
IS
LEFT
IN
A
MACHINE
IN
TROUBLE
-ov--e-secresssessesseseeseesseseeeeeseensennines
4
4.
HOWTO
REMOVE
DRUM
ASSEMBLY
ovvvsssesssessssesssesessensenssiseeneeasenessnesessucaneesaseneennnans
4
1.
GENERAL
Getting
Started
Unpackin
Gy
cereseeseeteeneeneeneacenenesseeseseensnensnnsesensncrncacensneeseeseeee
sete
1-1
Setting
up
the
remote
Commander
----1e+seseeerseeeeetereeteereesttees
1-1
Connectiong
the
VCR
-----+sssr-rss
wt]
Tuning
your
TV
to
the
VCR
vvrsrersrereserreseseseeestestecsenertecencntens
1-2
Setting
a
language
Lesadaa
tal
an
evedeubd
oseeeiees
tastes
wesetecsudeasesed
sesaezeres
1-2
Setting
the
clock
-----
wee
1-2
Tuning
the
VCR
cerssccresseeceeseeeeseessseetensecseneesenseesersrssecesenesenens
1-3
Basic
Operationa
Playing
ALAPE
<secreresesesteretseesteeeseetseeeserteneneeneranteces
seseseaeentencene
1-4
Recording
TV
programmes
S32
}5
Recording
TV
programmes
using
the
timer
-------e-rssrererrers
1-6
Additional
Operations
Playing/searching
at
various
Speeds
«oss
eee
eseeeeseeesesstees
1-6
Recording
TV
programmes
using
the
quick
timer
Checking/chaging/cancelling
timer
settings
-------+7---r-
1-7
Adjusting
the
picture
aadeudasassevsded
sucevdvacdeerecsbcenvecesdepsecdeceseseaeses
1-8
Editing
with
another
VCR
-------sssesssetssrseeeseerteneectes
tee
enctescees
1-8
Index
to
parts
AN
CONLOIS
-1-+ereereereeeteserteteetteteseceeeaeeeeceneeeets
1-8
2.
DISASSEMBLY
2-1.
CASEAND
FRONT
PANEL
ASSEMBLY
+t
-eeree"
2-1
9-2,
POWER
BLOCK
ovressessessessesseesessseseesasesseeseeneeneennenssenies
2-1
2-3.
MA-293
BOARD
WITH
MECHANISM
DECK
ASSEMBLY
ovvssssssessessessesesseceneersuecensereecsseessescenseeneeanennes
2-2
2-4.
MECHANISM
DECK
ASSEMBLY
o--rsserseerrrseterererees
2-3
2-5.
SLIDE
KNOB
cveseesseesseesseeseeeseeesseeeens
2-6.
CIRCUIT
BOARDS
LOCATION
«-1-:--ss:
reeset
2-4
3.
BLOCK
DIAGRAMS
3-1.
OVERALL
BLOCK
DIAGRAM
oreereeeereesteeeeee:
Sel
*
POWER
BLOCK
SR707
(SWITCHING
REGULATOR)
PRINTED
WIRING
BOARD
AND
SCHEMATIC
DIAGRAM
crsseresrieetctersttes
4-19
5.
REPAIR
PARTS
LIST
5-1.
EXPLODED
VIEWS
osvsessssecscecescecsesesesnseenesertaneseaceesnens
5-}
5-1-1.
FRONT
PANEL
ASSEMBLY
AND
CASE
--
soe
Se]
5-1-2.
CHASSIS
ASSEMBLY
-vseeserssecseeserssetrrteeretees
=
522:
5-1-3.
MECHANISM
DECK
ASSEMBLY-1
verre
eters
5-3
5-1-4.
MECHANISM
DECK
ASSEMBLY-2
vvrrrettrres
5-4
5-1-5.
MECHANISM
DECK
ASSEMBLY-3
wrrserrretrerctees
5-5
5-1-6.
MECHANISM
DECK
ASSEMBLY-4
-vrsrrreerrere
5-6
5-2.
ELECTRICAL
PARTS
LIST
-vesssseessecstererereerterteeetetines
5-7
6.
INTERFACE,
IC
PIN
FUNCTION
DESCRIPTION
6-1.
SYSTEM
CONTROL
—
MECHANISM
BLOCK
INTERFACE
(MA-293
Board
TC1
60)
cvsseereseseeteereeseerseeenensnnes
cnnreneacines
6-1
6-2.
SYSTEM
CONTROL
—
SERVO
PERIPHERAL
CIRCUIT
INTERFACE
(MA-293
Board
IC160)
ode
ccabactddcdescacbeadens
ciate
doeisaiedaeeasaeey
6-1
6-3.
SYSTEM
CONTROL
—
SYSTEM
CONTROL
PERIPHERAL
CIRCUIT
INTERFACE
(MA-293
Board
[C160)
-+-:rrrrrre
seers
6-2
6-4.
SYSTEM
CONTROL
~——
VIDEO/RP
BLOCK
INTERFACE
(MA-293
Board
C160)
----esseeceeeseeeeeestesests
erste
e
ceeneeeatinns
6-2
6-5.
SYSTEM
CONTROL
——
AUDIO
BLOCK
INTERFACE
(MA-293
Board
1C160)
---s-sessssseeceseesctsesenrstees
seteenaseeses
6-2
6-6.
SERVO/SYSTEM
CONTROL
MICROPROCESSOR
(MA-293
Board
10160)
sersseseeeesetreerettsetessetertn
ee
sestteesesens
6-3
7.
ADJUSTMENTS
7-1
MECHANICAL
ADJUSTMENTS
ovressersrettnes
crrrereees
7-1
7-2.
ELECTRICAL
ADJUSTMENTS.
vesessesssseertere
cities
7-1
2-1.
PREPARATION
BEFORE
ADJUSTMENT
-
7-1
2-1-1.
Equipment
Required
------+sssserseeseeeereseseseeserons
Pre
|
2-1-2.
Equipment
CONNECTION
ceeeeseereeeeteeteeterteenesen
ees
we
Jo}
2-1-3.
Input
Signal
Check
«:rereese-
Py
Fa
2-1-4.
Alignment
Tape
secaccececvcssncesensesssonseeees
7-1
2-1-5.
Input/Output
Levels
and
Impedance
aicsieidvadansuecsetesiers
Pop
2-1-6.
Adjustment
Sequence
coils
snsdsdanssSsondecesee
3-2.
VIDEO
BLOCK
DIAGRAM
ovrsrssssrressresseessesersteesnin
3-3
2-2.
POWER
SUPPLY
CHECK
3-3,
SERVO,
SYSTEM
CONTROL
BLOCK
DIAGRAM
---3-5
2-2-1.
Output
Voltage
Check
(MA-293
Board)
--
ws
3-4,
TUNER,
AUDIO
BLOCK
DIAGRAM
orvs-essesersteee
3-7
2-3.
SERVO
SYSTEM
CHECK
-sssessssssseseceeeessettins
a
ceretnentnnes
7-3
3-5.
POWER
BLOCK
DIAGRAM
ovrrsrersersersertestetsttsereeteseees
3-9
2-3-1.RF
Switching
Position
Adjustment
(MA-293
Board)
---
7-
3
2-4.
VIDEO
SYSTEM
CHECKS
crressssessserssserrsstinns
ettinerseens
7-3
4.
PRINTED
WIRING
BOARDS
AND
2-4-1.
X’tal
OSC
Check
(MA-293
Board)
«+--+
me
oo
SCHEMATIC
DIAGRAMS
2-4-2.
SYNC
AGC
Check
(MA-293
Board)
the
4-1.
FRAME
SCHEMATIC
DIAGRAM
crvereseesesesteseseeetes
4-1
2-4-3,
White
Clip/Dark
Clip
Check
(MA-293
Board)
«+--+
4-2.
PRINTED
WIRING
BOARDS
AND
2-4-4,
Recording
Y
Level
Check
(MA-293
Board)
--
SCHEMATIC
DIAGRAMS
oorsessesessesseseeesssseteseteseseenennes
4-5
2-4-5,
Recording
Chroma
Level
Check
(MA-293
Bard)
settee
7-4
*
MA-293
(MAIN)
PRINTED
WIRING
BOARD
--------
4-5
2-4-6.
Playback
Level
Check
(MA-293
Board)
--
7-5
*
MA-293
(TUNER)
SCHEMATIC
DIAGRAM
-------
4-8
2-5.
AUDIO
SYSTEM
ADJUSTMENT
---110
“7-5
«
MA-293
(VIDEO,
AUDIO)
2-5-1.
ACE
Head
Adjustment
saeccescncncuacceccesaneseesenen
thing
aoe
eCinanerges
95
SCHEMATIC
DIAGRAM
-ovsersesesesesseeceeeeeses
4-9
2-5-2.
E-E
Output
Level
Check
----:-+-::srecessssrersrer
stuns
arttinneesens
7-5
*
DS-76
(OPERATON
SWITCHES)
2-5-3.
Overall
Output
Level
and
Distortion
Factor
Getck
-------
7-5
PRINTED
WIRING
BOARD
oer
reereres
4-13
2-5-4.
Overall
Noise
Level
Check
--:-+1sesssssrsrrereetttms
eee
7-5
*
MA-293
(SERVO,
SYSTEM
CONTROL),
2-6.
ADJUSTMENT
PARTS
LOCATION
DIAGRAM.---.----
7-6
DS-76
(OPERATON
SWITCHES)
SCHEMATIC
DIAGRAM
cosseseessseesereseeeees
4-14
*
MA-293
(POWER
SUPPLY)
SCHEMATIC
DIAGRAM
ovrssssseeseeseeeesereees
4-17
a:
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