Blaupunkt MVP 01 User manual

@
BLAUPUNKT
MOBILE
VIDEO
SYSTEMS
VIDEO
PLAYER
MVP 01
PAL 7 607 900 031 (24v)
PAL/SECAM 7 607 900 082 (24v)
PAL 7 607 900 036 (12v)
IR REMOTE CONTROL
7 607 910 050
KH-C/VKD 3D93 420014 08/93
Kundendienstschrift « Service Manual
PAL-Version (...031, ...036)
Inhaltsverzeichnis
Seite
Table
of
Contents
Page
Technische
Daten
2
Technical
Data
2
Technische
Hinweise
2
Technical
Informations
2
Bedienungshinweise
MVP
01
3
Operating
Instructions
MVP
01
3
Erforderliche
MeBgerate,
Required
Servicing
Fixtures,
Schablonen
und
Spezialwerkzeuge
4
Jigs
and
Special
Tools
4
Service
Hinweise
5-13
Service
Notes
5-13
Mechanischer
Abgleich
14-40
Mechanical
Adjustment
Procedure
14-40
Elektrischer
Abgleich
41-44
Eiectricai
Adjustment
Procedure
41-44
Halbleiter-
AnschluBpunkte
45-47
Semi
Conductor
Connection
Points
45-47
Verdrahtungsplan
48-50
Interconnection
Schematic
Diagram
48-50
Blockschaltbilder
51-63
Block
Diagrams
51-63
Schaltbilder,
Platinen,
Oszillogramme
und
Schematic
Diagrams,
Component
Boards,
Spannungstabelle
64-94
Oscillograms
and
Voltage
Chart
64-94
Bedienungshinweise
IR-
Fernbedienung
95
Operating
Instructions
IR
Remote
Control
96
Schaltbild
und
Platine
SECAM-Teil
97-98
Schematic
Diagram
and
Board
SECAM
Section
97-98
Explosionszeichnungen
99-102
Exploded
Views
99-102
Ersatzteilliste
103-107
Spare
Parts
List
103-107

Technische Daten Technical Data
ALLGEMEIN GENERAL
Betriebsspannung: 12V (... 036)
24 V (... 031, ... 032)
Leistungsaufnahme: 15W Power consumption: 15 W
Betriebstemperatur: 0°c ~ 40°C Operating temperature: 0°C ~ 40°C
Luftfeuchtigkeit: 10 % - 80% Humidity: 10 %~- 80%
Abmessungen BxHxT: 215 x 95 x 269,5 Dimensions (WxHxD): 215 x 95 x 269.5
Masse: ca. 3 kg Weight: approx. 3 kg es ° 5
SS f : CS @®
VIDEO VIDEO
PAL-Version (...031, ...036)
Bedienungshinweise
Operating
Instructions
Operating voltage: 12 V (... 036)
24V (...031, ... 032)
Fernsehsystem TV system
CCIR:
625
Zeilen
CCIR:
625
lines
'
50
Halbbilder
50
fields
Hinweis:
Das
Gerat
darf
nur
mit
dem
beigelegten
Note:
The
unit_
may
only
be
connected
te
; .
Stromkabel
an
die
auf
dem
Typschild
ste-
operating
voltage
mentioned
on
the
type
labe!
PAL-Farbsignal
(...
031,
...
036)
PAL
colour
signal
(...034,
...
036)
hende
Betriebsspannung
angeschlossen
using
the
enclosed
power
cable.
PAL/SECAM-Farbsignal
(...032)
PAL/SECAM
colour
signal
(...032)
x
werden.
z
} - in- hatten. 1) POWER — to switch orvoff
Bandformat:
VHS
Band
format:
VHS
(i
POWER
zum
Ein-
und
Aussc
;
Q
;
‘
:
:
+
Hinweis:
Das
Gerat
schaitet
automatisch
*
Note:
The
unit
switches
on
automatically
Wiedergabesystem:
4
rotierende
Kopfe
Playback
system:
4
rotating
heads
ein,
wenn
eine
Cassette
eingeschoben
wird
and
starts
playback,
ifa
cassette
is
inserted.
VHS
Schragspurvertahren
VHS
helical
scan
und
geht
danach
in
die
Funktion
Wiederga-
Bandgeschwindigkeit:
B
P'
speed:
E
be.
(@}
TRACKING
+,-
—
to
eliminate
interference
patterns.
Press
Vor/Ric
aan
#
page
Lh
ti
asin
se
st
80)
(2)
TRACKING
+,-
—
zum
Ausblenden
von
Bildzittem
bei
Stand-
both
button:
Autotracking.
kspuilzeit:
.
6
Min,
ing
time:
approx.
6
min
bild.
Ausgangspegel:
1,0Vss
/
75Q
Output
level:
1.0Vpp
/
750
Beide
Tasten
driicken:
Autotracking.
3)
REW/
Ge)
~
after
STOP:
fast
rewind
Signal-Rauschabstand:
>
37
dB
SIN
ratio:
>37
dB
@Qrewe
-
al
eo
‘secciieia
iz
~
during
playback:
fast
picture
seek
tuning
- il 4 <
Horizontalauflésung
Horizontal
(Ton
wird
sesivnpeichate?
(the
sound
will
be
muted).
ae
Farbe:
>
230
Linien
colour
resolution:
>
230
lines
*
zuriick
auf
normale
Wiedergabe:
Taste
©
seal
nied
playback:
press
button
PLA’
PLAY emeut driicken. © 89am.
w Wh © PLAY/x2 ~ playback
(4)
PLAY/x2
Wiedergabe
£
‘
AUDIO AUDIO
~
Taste
2x
driicken,
Wiedergabe
mit
ca.
dop-
-
aie
ogc
ee
playback
with
approx.
Wiedergabesystem:
2
rotierende
Képfe
fir
HiFi
Playback
system:
2
rotating
HiFi
audio
heads
pelter
Geschwindigkeit
joubled
spee
.
u
i :
back
to
normal
playback:
press
button
PLAY
1
Kopf
far
Langsspur
1
head
for
longitudinal
track
ae
eres
ee
Epes
la
ea
Ausgangspege!:
-8
dBV
(400
mVss)
/
1
kHz
(1kQ)
Output
level:
-8
dBV
(400
mVpp)
/
t
KHz
(1kQ)
@
rr
—
nach
STOP:
schneller
Voriau
©)
GFF
—
after
STOP;
fast
forward
Ubertragungsbereich
Frequency
response
*
amBandende
automatisches
Zuriickspulen
*
automatic
rewinding
at
the
end
of
the
tape
HiFi:
20 Hz
—
20
kHz
HiFi:
20
Hz
—
20
kHz
—
bei
Wiedergabe:
schneller
Bildsuchlauf
-
during
playback:
fast
picture
seek
tuning
N
I
100
Hz
-
8
KH
No
.
(Ton
wird
stummgeschattet).
(the
sound
will
be
muted).
Oras
es
e
mal:
100
Hz
—
8
kHz
*
zurick
auf
normale
Wiedergabe:
Taste
*
backtonormal
playback:
press
button
PLAY
Signal-Rauschabstand
SIN
ratio
PLAY
emeut
drucken.
once
again.
HiFi:
>
68
dB
HiFi:
>
68
dB
€
STOP
~
Beenden
des
Bandiauts.
;
€)
STOP
—
switch
off
the
tape
winding
Normal:
>
40
dB
Normal:
>
40
dB
7)
PAUSE/STILL
-
Standbild
(Gerat
schaltet
nach
5
Min.
Stand-
PAUSE/STILL
-
still
(after
having
activated
the
still
for
5
min.
:
i
bild
aut
Stop)
;
the
unit
switches
over
to
stop)
*
zurick
auf
normale
Wiedergabe:Taste
+
backtonormal
playback:
press
button
PLAY
PLAY nochmais drucken. once again
.
.
. .
:
@)
EJECT
—
Cassettenauswurf.
‘
-
Technische
Hinweise
Technica!
Information
@
=
Cassohienschecht.
@
EJECT
-
coeeete
ee
eer
} } - cassette
40:
AUDIO
OUT
=
—
Wahi
der
Tonspur:
HiFi
L+R.
HiFiL,
HIFiR,
=
: .
jaaee
‘
HiFIR
1.
Feuchtigkeitsanzeige
1.
Humidity
indicator
a
SELECT
keine
Anzeige
-
normale
Tonspur.
appeias
car
hibrre
pies
aahierta
ills
iF
Po
sich
fone
MVP
01
sete
cab
cca
rey
durch
bpd
ae
fd
in
=
MVP
01
(e.g.
condensation),
Gr
RESET
-
pa
ane
ia
des
Bandzahiwerkes
@
RESET
=
to
reset
the
tape
counter
to
"0
:
00.00"
ondensation,
so
erscheint
im
Display
ein
“d”.
isplay
will
show
“cd”.
®
SSnmannry
al
‘ .
42)
MEMORY
=
tostore
atape
position
combined
with
button
Bei
eingeschaltetem
Gerat
(POWER
ON)
wird
die
When
the
unit
is
tumed
on
(POWER
ON),
2
special
@2;
MEMORY
-
a
pret
pole
nad
.
Verbin-
V2
RESET
tia
unk
eioed
anaingtte
peal
Feuchtigkeit an der Kopftrommeleinheit durch eine heating takes charge to remove the humidity at the head sopet ander gespeicherten Bandstelle bei the stored tape position when fast forwarding
parent
pseiia:
;
orem:
ae
aee
:
:
schnellem
Vor-
bzw.
Ricklauf.
or
rewinding.
aE
ad
se
nzeige
“d”
erloschen
ist
(nach
ca.
1
-
As
soon
as the
“d"
indication
goes
out
in
the
display
(after
@:
DISPLAY
-
zeigt
die
Funktionen
an.
Anzeige
.<"
@
~
indicates
the
functions.
Indication
“d"
.5 Std.), kann der MVP 01 wie gewohnt betrieben about 1- 1,5 hours), the MVP 01 can be put into operation Feuchtigkeitsanzeige. humidity indication
werden.
again.
Ga:
REMOTE
—
infrarotempfanger
fiir
Fernbedienung.
Ga)
REMOTE
—
infrared
receiver
for
remote
contro!
2.
Betriebstemperatur
2.
Operation
temperature
&
oc
=
hse
sett
Betriebsspannung.
as}
DC
~
jack
for
operating
voltage
=
‘
Wird durch die Umgebungstemperatur die Betriebs- If the operating temperature of the MVP 01 becomes too : 7 ae ies Mees tee : 5 se al aeons
pinata
eer
01
zu
hoch,
so
blinken
die
Bedien-
=
ae
to
a
abucatieag
temperature,
the
display
*
Hinweis:
Die
Anschliisse
1
und
2
missen
Note:
The
connections
1
and
2
shall
both
lement- - , indicators wil sta ING. beide angeschlossen werden. be connected.
oe soeiea ih Cee paths priate All functions will be blocked to protect the tape and the a AUTO REPEAT— zum automatischen Wiederholen. Gé) AUTO REPEAT - to repeat automatically
Indi
Fail
aera
apr
cassette
will
be
ejected.
'
.
‘@.
REMOTE
~
AnschiuB
fir
Kabelfernbedienung.
47)
REMOTE
~
connection
for
cable
remote
contro!
In diesem Fail das Ger&t ausschalten, bis sich die tn this case, turn the unit off until the temperature in the AB +20" — Video und Audio Ausgangsbuchsen. x - (2 — video and audio output jacks
Temperatur im Fahrzeuginneren abgekishtt hat. car cabin has cooled down. ao oe

Erfordertiche MeBgerate, Schablonen und Spezialwerkzeuge
Required Servicing Fixtures, Jigs and Special Tools
VHS-Testkassette
VHS alignment tape
8 627 000 540
Einstelpiatte
Post adjustment plate
8619 497 806
8619 497 816 Feineinstell-Schraubendreher
Fine adjustment screwdriver
8619 497 814 Schmiermittel
Lubricant
8 627 000 361 Lupe
Magnifying glass
Sechskantschlisseisatz
Hexagonal wrench set
8619 497 811
8619 498 006 Bandzugwaage
Back tension meter
Spezialzange
Retaining ring remover
ea
(Zum Enttemenund Aufsetzen von Sicherungsringen)
{For removing and inserting retaining rings)
8 619 498 001
8619 498 004
Einstell-Schraubendreher
Post adjustment screwdriver
of
Kopfreiniger
Head cleaning sticks
VA
8 627 000 364 Pinzette
8619 497 813
8619 497 807
8619 498 003
8 619 499 428
8 627 000 363
8 627 000 737
Héhenmefuhr
Ree! table height fixture
Spezial-Schraubendreher
H-position screw driver
Winkel-Kreuzschiitz
Lock screw wrench
Mechanikerspiege!
Mechanics ‘mirror
Winkelpinzette
Angle tweezers
A. Service Hinweise
A. Service Notes
When servicing, take notice of following items.
A. Service Position
1. In the order described in the Disassembly Section, remove
the Top Cover and open the Main C.8.A., page 14. Then
carefully place it into the Service Position as shown in
Fig. 1-1.
Operation I C.B.A.
Main C.B.A.
Operation
1
C.B.A.
VCR
Unit
Fig. 1-1
2. When servicing the bottom portion of the Mechanical
Chassis, remove the Mechanical Chassis from Bottom
Case removing 3 Screw Covers, 2 Screws (S - 13), 2
Screws (S - 14) and Screw (S - 15) in Fig. D7, page 16.
3. Next, place the Mechanical Chassis up side down as
shown In Fig. 1-2.
VCR
Unit
Main
C.B.A.
Operation I C.B.A.
Fig. 1-2
B. Test Point Information
B-1. Actual Board on VCR
With this model, al! Test Points use the foil solder pad for
connection of the measuring equipment.
B-2.
Schematic
and
C.B.A.
Diagrams
in
this
i
Service
Manual
on
pages
48
-
98
© : Used for the indication of Test Point with No Test
Pin (Foll Solder Pad).

C. Simplified Fauit Finding Point (TP6002)
This model has the Simplified Self- Diagnostic System to facilitate finding the cause when the Unit shuts off or stops
automatically.
1. Preparation
Connect the OSCILLOSCOPE probe to TP6002 on the System Control Section of the Main C.B.A.
2. Indication
The Signal at TP6002 indicates the foliowing causes.
Note:
In hormal condition, DC +5V Signal at TP6002 is displayed.
fe] ween [i ‘|
1. | Takeup Reel Lock Low Voltage There Is no TAKEUP REEL Sensor
Pulse for 5 seconds or 1 second
(only SEARCH MODE).
(Takeup Reel Sensor Puise at pin 68
ot 1C6001)
Cylinder Lock 0.3Hz Pulse (Duty 50%)
3.0Sec
f———1
Cylinder Motor stops in the REC,
PB,CUE, REVIEW, SLOW or STILL
mode for 1 second.
{Cylinder Lock ( L) signal is detected
inside 1C6001)
Exceeds Loading/Unloading Time 0.7Hz Pulse (Duty 50%)
1.4Sec
b—
Loading/unloading time exceeds the
normal loading/unloading time, with
no shift to the next mode. (Position
signals supplied from Mode Select
Switch to pins 11- 13 of 1C6001)
Exceeds Cassette Loading/Unloading
Time
intermittent Pulse
Cass ing ti
ssbciled-obes ette loading/unloading time ex-
ceeds the normal cassetie load-
Sr
5\
|
ing/unloading
time,
with
no
shift
to
the
next
mode.
(Cassette
Off
(H)
/
Up
(M)
/
Down(L)
ee
Plt
OV
|
signal
at
pin
71
of
1C6001)
D. Connection of the Flexible Cable to Trap
Connector
ee
eee
D.D.
Cylinder
Unit-
P3501
Main
C.B.A.
For
the
Location
of
Pin
1
on
the
Trap
Connectors,
use
the
pin
1
indication
on
the
Typical
C.B.A.
D.O. Cylinder
Unit
Flexible Cable
Fig. 3-1
(Removal or installation of Flexible Cable)
a. Removal
4)
On
the
Trap
Connector,
pull
out
both
ends
of
the
Locking
Tab
surrounding
the
cable
end
to
release
the
Trap
portion
of
the
Connector.
Then
pull
Fiexible
Cable
out
to
remove
as
shown
in
Fig.
3-
2.
Flexible Cable
Head Amp C.B.A. Unit
Pull beth sides
of tab together
b. Installation
1. Insert the end of the Flexible Cable into the Trap Connec-
tor so it lays smoothly across the slot.
Press
the
middie
of
the
Cable
firmly
against
the
Trap
Connector
slot,
and
hoid
it
securely.
.
Without
pinching
the
Cable,
press
the
Lacking
Tabs
in
against
the
Trap
Connector
until
both
ends
snap
into
their
locked
position.
_
Pull
lightly
on
the
Cable
to
check
for
positive
connection.
Le)
wo
b
Note:
Take care when removing or installing the Flexible
Cable to prevent Cable damage.
E. Cassette Tape for servicing with Left Side Down
This
position
Is
used
only
when
servicing
the
Bottom
portion
of
the
Mechanical
Chassis.
If
misloading
of
the
cassette
tape
is
encountered
in
this
position,
press
the
Cassette
Tape
firmly
into
the
Cassette
Up
Unit
with
the
teft
thumb.
F. Variable Voltage Isolation Transformer
Because
a
Hot
Chassis
Ground
is
present
in
the
Power
Supply
Circuit,
an
Isolation
Transformer
must
be
used.
Also,
in
order
to
have
the
ability
to
Increase
the
input
voltage
slowly,
when
troubleshooting
this
type
Power
Supply
Circuit,
a
variable
isolation
transformer
is
required.
G. Service Test Point (TP6001)
The detection of the Supply / Takeup Photo Transisto:s,
Reel Sensor and Cylinder Lock will be inhibited when
TP6001 is grounded on the System Control Section of the
Main C.B.A.

H. Method for Manual Loading / Unloading of VCR
Turn the Center Pulley Unit in Fig. 4 clockwise (for loading)
or counterclockwise (for unloading) while pushing the
change lever (located on bottom side) in Fig. § or pushing
the piunger of the solenoid (located on top side) in Fig. 6 as
indicated by the arrow mark to release the lock.
Bottom View
ee ‘ . \
S Center Pulley
b | Pitan 3
Fig. 4
Bottom View
Change t-ever
Fig. 6
|. How to place the Cassette Holder in the Down
Condition without a Cassette Tape
In the Cassette Holder up condition, the VCR can not be
operated, even if Service Test Point (TP6001) is grounded.
To place the Cassette Holder in the down position without a
cassette tape use the following procedure.
1. Hold the Lock Arm with right thumb until the Cassette
Holder Unit clears the Locking Tab of the Rear Frame
Unit.
2. Press the Sub Holder Unit into the loading condition
with left thumb as shown in Fig.7.
3. After clearing the Locking Tab, the Cassette Holder
Unit will move Into down position by itself.
ee
Locking Tab
\
Lock Arm
Cassette Holder Unit
Cassette Ulp Unit
Fig. 7
J. Service of Capstan Rotor Unit
The Capstan Rotor Unit is supplied as a replacement part In
a complete unit with a spring loaded Capstan pulley. Do not
remove the Retaining Ring on the Capstan Pulley of the
Capstan Rotor Unit.
Capstan Rotor
5
=
Retaining
Ring
\®)
Constan
Pulley
Fig. 8
K. Cleaning with Isopropyl Alcohol 91%
All Isopropyl Alcohol 91% must be removed from the tape
path after cleaning by using a dry Head Cleaning Stick
(8 619 497 813) or tape damage will occur.
L. How to defeat the Auto Tracking Function
To defeat Auto Tracking Function piace a jumper between
TP6003 and GND on the System Control Section of the
Main C.8.A. in STOP Mode to maintain the Neutral Position.
M. Black Screws on the Chassis
Black Screws are used on the Mechanical Chassis to iden-
tify screws that require adjustment.
N. Service of RF Converter Unit
|
Since
the
RF
Converter
Unit
has
already
been
adjusted
at
the
factory.
Do
not
try
to
adjust
the
4.5MHz
(F)
Crystal
Oscillator
Frequency
Control.
O. Set Tracking to the Neutral Position
Eject
and
reinsertion
of
Tape
will
access
the
Neutral
Track-
Ing
position.
ire)

P. How to read the Disassembly / Assembly
Procedures
(For Cabinet Part)
(For Mechanica! Part)
ae
a ae
® UNHOOK/UNLOCK/ RELEASE ADJUSTMENT
/UNPLUG/UNSOLDER -CONENON
ee
Ses, Alignment Procedures for
Mechanisa iten 13-2
aE SETTING PLATE it
(+) Sea, Aligrment Procedures tor
Mechanism (tee 13-2
2(C-1), 24P-1), 4(P-2) cMote 2> | (+) Sea, Setting Condition in Fig Dud
@®: Order of steps in Procedure
When reassembling, perform the step(s) in the reverse order.
These numbers are also used as the identification (location) No. of parts in Figures.
@®: Starting No. followed by corresponding part which can be removed at this stage.
See example below.
Example: Pressure Cam Cap can be removed without removing any other parts beca
Abseasiivar
thane
nadig
9
any
Pp
use
the
STEP/LOC.
No.
and
the
But Pressure Roller Arm Unit can be removed only after removing Pressure Cam Cap (No.@)
@: Part to be removed or installed.
@: Location of part.
T=Top; B=Bottom
®: Fig. No. showing Procedure or Part Location.
©: Identification of part to be removed, unhooked, unlocked, released, unplugged
d ' . 5 , , unclamped o}
P=Spring; W=Washer Bee atic
C=Cut Washer, A=Retaining Ring
N=Nut; S=Screw
% = Unhook, unlock, release, unplug or unsolder
2(C- 2)=2 Cut Washers (C- 2)
@: Adjustment information for installation.
# = Condition for adjustment
(+) : Refer to Exploded Views for Lubrication intormation.
Q. Replacement procedure for Leadiess (Chip)
Component
The
following
procedures
are
recommended
for
the
replace-
ment
of
the
leadiess
components
used
In
this
Unit.
4. Preparation for replacement
a. Soldering tron
Use
a
pencil-type
soldering
Iron
that
uses
less
than
30 watts.
b. Soider
Eutectic
Solder
(Tin
63%,
Lead
37%)
is
recom-
mended.
c. Soldering time
Do not apply heat for more than 4 seconds.
d. Preheating
Leadless capacitor must be preheated before Instal-
lation.
{130°C -150°C , for about two minutes.)
Note:
a. Leadless component must not be reused after
removal.
b. Excessive mechanical stress and rubbing of
the component electrode must be avoided.
2. Removing the leadiess component
Grasp the leadiess component body with tweezers and
alternately apply heat to both electrodes. When the
solder on both electrodes is melted, remove leadless
component with a twisting motion.
Note:
a. Do not attempt to lift the component off the board
until the component is completely disconnected
trom the board by a twisting action.
b. Take care not to break the copper foil on the
printed board.
Soldering Iron
Fig. 9
3. installing the jeadiess component
a. Presolder the contact points of the circuit board.
YA Soldering fron
Z_—~ Presoider
eal ee
Fig. 10
b. Press the part downward with tweezers and solder
both electrodes as shown below.
uv Wweezers
Glia Soldering tron
~—— Solder
Fig. 11
Note:
Do not glue the replacement leadiess component to the
circuit board.
R. How to remove / install the Flat Pack IC
1. How to remove the Flat Pack IC
(with Hot Air Flat Pack IC Desoldering Equipment)
(FOR EXAMPLE)
Fig. 12
(1) Prepare the Hot Air. Fiat Pack IC DESOLDERING
EQUIPMENT. And then apply hot air to Flat Pack IC
about 5~8 seconds,
(2) Remove the Flat Pack IC with tweezers while applying
the hot air.

CAUTION :
1. Do not supply the hot air to the chip parts around the
Fiat Pack IC for tong time as damage may occur to the
chip parts around the Flat Pack iC.
Hot Air Flat Pack IC
C.B.A.
a
Desoldering
og
Equipment
Masking Sa
Tape q
Tweezers——"
Flat Pack IC
Fig. 13
Put Masking Tape around the Flat Pack !C to protect
adjacent parts.
2. The Flat Pack IC on the P.C.B. is affixed with glue, so
be careful so as not to break or damage any foil under
the iC or at each pin when removing it.
(with Soldering tron)
(1) Use desoldering braid to remove the soider from all pins
of the Flat Pack IC.
Use solder flux applied to all pins of the Flat Pack IC to
allow easy removal.
Desidering
FlatPackic Braid
Soldering Iron
Fig. 14
(2) Lift each lead of the Flat Pack IC upward one by one
using a sharp pin or non solder wire (iron wire), while
heating the pins using a fine tip soldering iron or a hot
air blower.
Soldering tron
Fig. 15
{with tron Wire)
(1) Use desoidering braid to remove the solider trom ait pins
of the Flat Pack IC.
Use solder flux applied to al! pins of the Flat Pack IC to
allow easy removal.
{2) Affix the wire to workbench or solid mounting point as
shown in Fig. 16.
{3) Pull up wire as the solder melts so as to lift the IC lead
from the P.C.B. contact pad, while heating the pins using
a fine tip soldering iron or hot air blower.
Hot Air Blower
Solid Mounting
Point Se
tron Wire
~—— Of Soldering Iron
Pull up gently
to remove
Fig. 16
Note:
When using a soldering iron care must be taken to
ensure that the Flat Pack IC is not being held by giue or
the P.C.B. may be damaged if force is used.
If glue is holding the IC, then heat the IC with hot air to
loosen the glue.
2. How to install the Flat Pack IC
(1) Use desoldering braid to remove the solder from the foil
of each pin of the Flat Pack IC on the P.C.B. so you can
install a replacement Fiat Pack IC more easily.
(2) The ” @ " mark on the Flat Pack IC indicates pin 1. (See
Fig. 17)
Make sure this mark matches the 1 on the P.C.8. when
positioning for installation.
Then pre-soider the four corners of the Fiat Pack IC
(See Fig. 18)
“Example”
Pin 1 of the Flat Pack IC is indicated
bya "@" mark.
Fig. 17
Soldering tron
Presoider
Fiat Pack IC
Fig. 18
(3) Solder all pins of the Flat Pack IC.
Make sure that none of the pins have solder bridges
between Pins on the Flat Pack IC.
S. Special Note
All integrated circuits and many other semiconductor de-
vices are electrostatically sensitive and therefore require
special handling techniques described under the “ELEC-
TROSTATICALLY SENSITIVE (ES) DEVICES” section of
this service manual.
T. Voltage Measurement
1. Voltage Chart
a. Color bar signal in SP mode.
b. ----:Unmeasurable or unnecessary to
measure,
2. Schematic Diagram
a. Audio Section
monoscope signal in PB mode.
b. Other Sections
color bar signal in PB mode.
Note:
Voltage Indications for PB mode
on Schematic are as shown below.
2.5
PB mode
-13-
U. How to Read Waveform
=, © Connecting Font
“~@ D vons/Niv
@ Volis/Ow
@ Connecting Paint
© Tine/Div
@ Trigger Channel of ine
scope
(1: UPPER, 2: LOWER,
@ Operation Moge of VCR
@ Wavetorm Paint on
Schematic
m—® @ AV}: Peak to Peak.
V. Indication for Zener Voltage of Zener Diodes
The Zener Voltage of Zener Diodes are indicated as such
on schematic Diagrams.
Example: (6.2V)...Zener Voltage
W. “©” Marks on C.B.A. layout indicate
“©” indicates the connection gaint between the Foil Side
and the Component Side the C.B.A.
X. How to identify Connectors on Schematic
Diagram
Each connector is labeled with a connector No. and Pin Nc.
indicating what it is connected to, in other words, its counter
part.
Connections between large P.C.B.’s and small circuit
Boards are illustrated on the large P.C.B. schematics,
Use the interconnaction schematic diagram to find the
connections between associated connectors.
Example:
The connections between C.B.A.s are as shown below.
MAIN C.B.A.
(TO HEAD AMP ASS'Y)
(P3001-1 P3501 11]
| P3001-2§P3s01-1 | C.B.A. to which
[ P3007 - 3] 1Pa501-9 | this connector is
P3001-4 1P3501-4 | connected.
| F |
Connector No. Connector No. and Pin No. to
and Pin No. on which connector on the left is
Main C.B.A. connected.

B. Mechanischer Abgleich
B. Mechanical Adjustment Procedure
Second
Shieid
J Sheet
1. DISASSEMBLY OF CABINET PARTS
1. DISASSEMBLY FLOW CHART 2. DISASSEMBLY METIIOD
This flow chart indicates the disassembly steps of the
cabinet parts and the P.C. Boards in order to gain access to REMOVAL
item(s) to be serviced. When reassembling, perform the
slep(s) in the reverse order. Bend, roule and dress the Fiat REMOVE
Cables
as
they
were
originally.
%*
UNLOCK/RELEASE/
, . UNPLUG/UNCLAMP/
UNSOLDER
@ Top Cover
2(S- 1)
Clam
@ Top Cover
@® Front Panel Ass'y
@ Operation | and ® Main C.B.A
NC.B.A.s
* P4201, * P6002,
(S- 2)
3(S- 3), 5(S- 4), @ Main C.B.A.
* P7551
Fig. DS
4(S-5), Shield Sheet,
(S- 6), (S-7), (W- 1),
Connectors, Clamper
® Power Supply ASS'Y
and Jack C.B.A.
* P1301, (S- 8),
2(S-8), * P1001
(S- 10), (S- 11),
P.C.B. Angle- R,
3(S- 12), * (L-1)
@ Mchanism Chassis
Screw Covers,
2(S- 13), 2(S- 14),
{S- 15)
Mechanical
Chassis
Fig. D1
List of Abbreviations :
2(S- 1)=2 Screws (S- 1)
(L- 1)=Locking Tab (L- 1)
(W- 1)=Washer (W- 1)
G) Jack C.B.A. Unit
© Power Supply Ass'y
Front Panel Ass'y
Fig. D4 Fig. D6

Cassette Up Unit
@ Machanical
Chassis
Screw Covers
Fig. D7
Reference <Note> In Table 2:
1.
When
reinstalling
the
Cassette
Up
Unit,
take
care
so
as
not
to
place
the
Position
Detect
Switch
of
the
Cassette
Up Unit onto the Switch Cam Gear.
2.1)
pase
lift
the
Mechanical
Chassis
from
the
Bottom
ase.
2)
When
handling
Mechanical
Chassis,
do
not
touch
mechanical parts on it.
CAUTION :
When
reinstalling
the
Mechanical
Chassis,
at
first,
position
the
left
and
right
rear
corners
of
the
Chassis, then position other corner.
2. PROCEDURE FOR CLEANING
UPPER CYLINDER UNIT
1. Position the Video Head to permit access for cleaning,
and hold the Upper Cytinder to keep it from turning while
cleaning.
2. Gently rub the Video Heads in the direction of tape travel
with a Head Cleaning Stick (8 619 497 813) moistened
with Isopropy! Alcohol 91 %.
3. Repeat for the other Video Heads.
CAUTION:
All Isopropyl Aicohol 91% must be removed from the
tape path after cleaning by using a dry Head Cleaning
Stick or tape damage will occur.
fi Lae
Cylinder SJ
ideo Head
Cleaning Stick (8 619 497 813)
Fig. M1
Note:
1. Do not rub vertically.
2. Do not apply any pressure to the head. If contaminant
Is not easily removed, continued gentle wiping will
usually remove it.
3. Clean the Cylinder surface with Isopropyl Atcoho! 91%
if fingerprints are present after cleaning the Video
Head. See Caution above.
3. ADJUSTMENT PROCEDURES
1. REPLACEMENT OF UPPER CYLINDER UNIT
1-1. REMOVAL OF UPPER CYLINDER UNIT
Work with extreme care when removing or replacing the
Upper Cylinder Unit. Do not touch Video Heads during
servicing.
1. Unsolder only the Lead Pins which are Indicated by
*t t ’ marks as shown in Fig. M2.
2. Remove 2 Screws with Washers (A) and gentty lift the
Upper Cylinder Unit from the shaft.
oe ae
Screws with Washers {A}
6 Lead Pins
(AR. 2L, 6R)}
6 Lead Pins (6L. 2R, AL)
Fig. M2
1-2. CLEANING OF D.D. CYLINDER SHAFT
AND THE SURFACE
. Before reinstalling a new unit, clean the D.D. Cylinder
Shaft and the surface that engages with the Upper
Cylinder with a soft cloth dampened with isopropyl
Alcohol 91% in Fig. M3. See Caution under 2. Procedure
tor Cleaning Upper Cylinder Unit.

1-3. REPLACEMENT OF UPPER CYLINDER
UNIT
1. Install the new Upper Cylinder Unit carefully so that the
Lead Pins are properly matched on the Head Relay
Board. For details on the installation position, reter to
Fig. M4.
Note:
1. install the Lead Pins with extreme care so as not to
damage them. install the Upper Cylinder so that
the color of the P.C.B. on the Upper Cylinder
matches the color of the P.C.B. on the D.D.
Cylinder (White to White, Green to Green)
(indicated
by
‘+
T°
Marks)
Holes
for
6
Lead
Pins
(AR,
2L.
6R)
Upper
Cylinder
Holes
for
6 Lead
Pins
(6L,
2R.
AL)
(Indicated
by
‘ft
T°
Marks)
6 Lead Pins
D.D.
Cylinder
Fig. M4
2. Tighten 2 Screws with Washers (A) shown in Fig. M2
and resolder the Lead Pins to the Head Relay Board.
3.Clean the Upper Cylinder with a deerskin swab
(Cleaning Stick) saturated with Isopropyl Alcohol 91%.
See Caution under 2. Procedure for Cleaning Upper
Cylinder Unit.
Note:
Upon completion of reptacement, confirm performance.
'f required, perform “TAPE INTERCHANGEABILITY
ADJUSTMENT", especially “HORIZONTAL POSITION
ADJUSTMENT OF AYC HEAD”.
=48:-
2.REPLACEMENT OF D.D. CYLINDER UNIT
Work with extreme care when removing or feplacing the
D.D. Cylinder Unit. Do not toucn Video Head during
servicing.
1. Remove the Mechanical Chassis tram the Bottom Case.
2. Place the Unit up side down.
3. Remove Black Screw (A) and the Grounding Plate.
4. Disconnect Connectors P3501 on the Main C.B.A. and
P1502 on the D.D. Cylinder Unit.
5. Remove 3 Screws (B) and then iitt the D.0. Cylinder Unit
stowly from the top side.
Black Screw {A} Grounding Plate
Bottom View
Bottom View
Fig. M5 ~ 2
Note :
Since there is very jittle clearance between D.0D.
Cylinder Unit and chassis, remove the D.D. Cylinder
Unit gently and carefully.
8. Reinstall the new D.D. Cylinder Unit on the chassis by
reversing the procedure previously described.
Note:
1. Reinstall the new 0.D. Cylinder Unit so that the 2
projections on the chassis meet the 2 holes on lower
surface of the D.D. Cylinder. Then fit the new D.D.
Cylinder Unit to the chassis by turning it, refer to Fig.
M5 -~ 3. Hoid the D.D. Cylinder with extreme care so
as not to touch the Heads or the tape path on the
Cylinder. If they are touched then clean it with a
deerskin swab (Cleaning Stick) saturated with Isopro-
pyl Alcohol 91%. See Caution under 2. Procedure for
Cleaning Upper Cylinder Unit.
Turn clockwise while looking
at it from the Bottom Side
Fig. MS - 3
2. Upon completion of replacement procedure, confirm
pertormance. ff any further maintance is required, perform
"TAPE INTERCHANGEASILITY” with the alignment tape
(8 627 000 540).
3. Adjustment of the Grounding Plate Is required after
installation. Refer to tem 3.
3. CONFIRMATION OF GROUNDING PLATE
INSTALLATION POSITION
Purpose :
To optimize the position of Grounding Piate.
Symptom of Misadjustment :
May cause Cylinder rotating buzz.
4. Remove the Mechanical Chassis from the Bottom Case.
2. Stand the Mechanical Chassis with left side down.
3. Check to see If the Grounding Piate is properly set in a
position just less than imm (but not more than 1mm) as
measured from the center of the plate to the center of the
Cylinder Shaft as shown in Fig. M6. If required, adjust the
Grounding Plate position by loosening Black Screw (A).
Note:
Never install the Grounding Plate in the opposite position
{on the front side of the center of the Cylinder Shaft), but
always within a maximum of 1mm to the rear side of the
center of this shaft.
Black Screw (A}—,
Grounding
Plate
Rotating
Direction
Center
4. POSITION ADJUSTMENT OF TENSION POST
(PRELIMINARY)
Purpose :
To feed a constant tension to the tape so that tape runs
with stability, by performing a preliminary adjustment.
Symptom of Misadjustment :
1) If the adjusted value is below the specification, the
tape tension is not sufficient, thus causing a tape slack
to occur.
2) if the adjusted value is above the specification, the
tape tension is too high, thus causing tape damage to
occur,
* Equipment Required :
2MM Hex. Wrench --rerseersserereeeeeeeees (Purchase Locally)
1, Remove the Cassette Up Unit.
2.Connect TP6001 and GND on the System Control
Section of the Main C.B.A. through a jumper wire.
3. Push the PLAY button to complete foading operation
sequence.
4. As soon as loading is completed, disconnect the AC plug.
5. Insert the Hex. Wrench (2mm) into the nut on the
Tension Band Fastener and adjust it (only counter-
clockwise) as indicated by the arrow so that the outside
edge of the Tension Post lines up with the outside of the
P1 Post as shown in Fig. M7 (as viewed looking down the
+ edge of the Cassette Side Plate (L) Unit).
6. Remove the Hex. Wrench (2mm), and the jumper
{TP6001 -— GND), plug in AC Cord, then complete
unloading operation sequence,
-19-

Outside of the
Tension Post
Qutside edge of
the Tension Post
5. MEASUREMENT AND ADJUSTMENT OF BACK
TENSION
Purpose :
To fine adjust the Back Tension so that the tape runs
stable with a constant tension.
Symptom of Misadjustment :
1) If the tape tension is less than the specified value, the
tape can not come Into proper contact with the Video
Heads, resulting In poor picture playback.
2) if the tape tension is too high, the tape will soon be
damaged.
A: Measurement Procedure
* Equipment Required :
Back Tension Meter (Made in U.S.A., Purchase Locally)
VHS Cassette Tape (120 Minute Tape)
* Specification : 23~27g
_
. Remove the Top Cover.
2. Play back a cassette tape from its beginning for approx.
10 to 20 seconds, until the tape's movement has
stabilized.
. Insert Tension Meter in tape path and confirm reading.
If
the
reading
Is
out
of
specification,
perform
the
adjustment
procedure.
aw
Full Erase
Head
Fig. M8
Note:
1. Make sure that the three probes of the meter are ali
in solid contact with tape, but out of contact with
any other parts while measuring.
2. It is recommended that measurements be taken
three times because the tension meter is very
sensitive to external vibrations.
B : Adjustment Procedure
1. Remove the cassette tape. Then re-position Tension
Spring on the Tension Arm Sase Teeth in either direction
as indicated by the arrow to obtain the specified tension.
2. Re-position Tension Spring toward front side to increase
tension, toward rear side to decrease tension.
3. Reinstall a cassette tape and verify tension with the
meter once again.
4. Reinstall the Top Cover,
Note :
If the specified tension is not obtained even if the
Tension Spring is re-positioned, replace the Tension
Spring,
replace
the
Tension
Band,
clean
the
Reet
Table or make sure if there is no dust between
Tension Band and Reel Table.
“96-2
Fig. M9
6. HEIGHT ADJUSTMENT OF REEL TABLES
Purpose :
To properly align the height of the tape wound on the
Supply and Take- Up Reels.
Symptom of Misadjustment :
If the height of the tape is not properly aligned, the tape
will eventually be damaged.
* Equipment Required :
Post Adjustment Plate 0.0...
Reel Table Height Fixture
# Specification ---+-+-:sseesecseeeesececseeceeceseeeesenees
1. Remove the Cassette Up Unit.
2.Place the Post Adjustment Plate over the reels, and put
the fixture on it. Set the fixture to zero "0* and ensure that
the foot of the fixture touches the cut- out portion of the
plate.
8 619 497 807
8 619 497 806
Fig. M10-1
3.
Then
measure
the
top
portion
of
the
Reei
Table
and
compare
the
difference
against
the
result
of
the
measure-
ment
taken
in
the
above
step.
Do
the
same
for
the
other
reel
table.
=D 4e=
8 619 497 807
8 619 497 806
Reel Table
Fig. M10-2
4. If the difference is more than 0.1mm(higher or tower),
adjust the heignt of reel table to obtain the specified
height.
5. For adjustment, change the poly washer located under
the reel table. (The washer is available in only one size
of 0.13mm thick)
6. Reinstall the Cassette Up Unit and the cabinet parts.
7. CONFIRMATION OF TAKEUP SHAFT HOLOER
ASS'Y INSTALLATION POSITION
Purpose :
To properly set the Takeup Shaft Holder ASS'Y position.
Symptom of Misadjustment :
The tape will be damaged.
1. Lift the Mechanical Chassis slightly from the Bottom
Case. Turn Center Pulley Unit clockwise until post 2 and
3 are partially loaded (Refer to SERVICE NOTES AND
CAUTIONS Item H).
2,
Check
to
see
if
the
Takeup
Shaft
Holder
ASS'Y
is
properly
set
in
a
position
just
fess
than
or
equal
to
0.2mm
as
measured
from
the
right
side
to
the
center
of
the
Shaft
Holder
Plate
as
shown
in
Fig.
M11.
If
requirea,
adjust
the
Takeup
Shaft
Holder
ASS‘Y
position
by
loosening
Biack
Screw
with
Washer(A).
Note:
Never
install
the
Takeup
Shaft
Holder
ASS'Y
in
the
Opposite
position(on
the
left
side
of
the
center
of
tne
Shaft Holder Plate), but always within a maximum of
0.2mm to the right side of the center of this plate.
|
f\
Cd 7
Takeup
Shaft
®)
>
Right
Sie
Holder ASS'Y
Black Screw
with Washer {A)
Shaft Halder
Plate
Loaded. oF
(Approx. 20mm)
wae————Center of
eas
3
pial
2mm
=
Takaup
Shaft
elder
Flate
—
ae
Hoider
assy
oy
Fig. M11

8. HEIGHT AOJUSTMENT OF TAPE GUIDE POSTS
(PRELIMINARY ADJUSTMENT)
* Equipment Required :
Lock Screw Wrench ..
Post Adjustment Piate ..
Reel Table Height Fixture
Post Adjustment Screwdriver...
8-A. HEIGHT ADJUSTMENT OF P2 AND P3
Purpose :
To properly align the position of the tape with the
Cylinder Lead so that the tape runs with stability.
ww. (8 619 499 428)
....(8 619 497 806)
.... (8 619 497 807)
... (8 619 498 004)
Symptom of Misadjustment :
1) Since the Envelope Waveform Signal cannot be
tracked properly, the Playback picture will be poor.
2) Since the tape will not run stable, the tape will
_. eventually be damaged.
3) Tape interchangeability is poor.
1. Remove the Cassette Up Unit. Then install the Adjust-
ment Plate.
8 619 497 806
Fig. M12-1
2. First, Jower all posts to match the height condition as
shown in Fig. M12- 2.
The upper edge of the jower tape guide on each
post should be below the bottom of the foot.
Loosen Black Lock Screws located at lower portion
of posts (P2 & P3) using Lock Screw Wrench, then
turn the posts with Post Adjustment Screwdriver,
290
a 8619 497 807
(Fixture)
(Adjustment
Plate)
8 619 497 806
X
First Lower
i then raise post
Upper edge of
Lower Tape Guide
Black Lock Screw
Fig. M12-2
3. Place the fixture on the Adjustment Plate and fit the foot
to the Adjustment Plate as shown in Fig. M12- 2.
(The foot of the fixture should be fully lowered until it
touches the plate.)
4. Set the fixture to zero “0” and slowly raise the post until it
just touches the foot.
When the foot touches the post, it should fit as shown in
Fig. M12- 3 (b). For adjustment of P2 and P3, use the
Post Adjustment Screwdriver.
Back View
ty
Fig. M12-3
Post Side View
Foot
(a)
NO GOOD
Note:
Upon completion of adjustment, tighten the Black Lock
Screws on P2 and P3 using the Lock Screw Wrench.
8-B. HEIGHT ADJUSTMENT OF P5 ARM UNIT
Purpose :
To properly align the Phase and Speed Controls during
the
CUE/REVIEW
Modes
and
perform
the
CUE/REVIEW
operations
without
any
small
additional
noise
in
the
picture.
Symptom of Misadjustment :
1) Noticeable noise appears in the picture.
2) The tape will eventually be damaged.
* Equipment Required :
Post Adjustment Plate ...
Reel Table Height Focur
Nut Driver (5.5 mm)
...(8 619 497 806)
(8 619 497 807)
. Purchase Locally
* Specification : 0 {+0, — 0.08) mm
PS Arm Unit
§.5 mm Nut
8 619 497 807
8 619 497 806
O(+0. -0.08) mm
Fig. M12-4
1. Place the Post Adjustment Plate over the Reels, and put
the Fixture on it. Set the Fixture to Zero “0” when the
foot just touches the Post Height Adjustment Piate.
2. Slightly raise the P5 post above the piate by turning the
5.5mm Nut counterclockwise. Place the foot on the post
as shown In Fig. Mi2- 4.
3. Then stowly turn the 5.5mm Nut clockwise until the
fixture reads the specified height.
4. Remove the Post Adjustment Plate. Reinstall the
Cassette Up Unit.
Note:
Upon completion of above procedure, play back the
tape and confirm that the tape runs properly without
curling between lower and upper limits of P5 Post.
Also confirm that the tape is running smoothly.
Hf adjustment Is required, slightly turn the 5.5mm Nut
until the curling smoothes out.
9. TAPE INTERCHANGEABILITY
ADJUSTMENT(FINAL ADJUSTMENT)
Note: .
To perform these adjustment/confirmation procedures,
make sure that the Tracking Control is set in the Neutral
position.
* Equipment Required :
Dual Trace Oscilloscope
PAL VHS Alignment Tape (8 627 000 540)
Post Adjustment Screwdriver (8 619 498 004)
H-Position Adjustment Fixture . (8 619 498 003)
Lock Screw Wrench ...(8 619 499 428)
Nut Driver (7 Mm) ......sscscccssscessereseseneeereee Purchase Locally
9-A. CONFIRMATION OF TAPE TRAVEL
Purpose :
To make sure that the tape run is well stabilized,
Symptom of Misadjustment :
lf the tape travels with instability, the tape wii be
damaged.
1. Play back a cassette tape and confirm that the tape
travels without curling at the upper and lower guides on
posts P2 and P3.
-23-
Fig. M13
2. if curling is apparent, adjust the height of posts by
turning the top of post with the Post Adjustment
Screwdriver. (for P2 & P3)
Note:
Before turning P2 and P3, slightly loosen the Black
Lock Screw using the Lock Screw Wrench.
9-B. CONFIRMATION OF A/C HEAD HEIGHT
Purpose :
To make sure the tape runs properly along the Control
Head.
Symptom of Misadjustment :
If the control signal is not properly picked up, Servo
Operation can not be achieved.
This confirmation is required when the A/C Head is replaced
and for a preliminary height adjustment. For final adjust-
ments, perform items 9-C and 9- D.
1, Looking at the lower edge of the Control Head with the
7120 tape in motion, ensure that the lower edge of the
tape runs 0.25mm above the lower edge of the control
head.
If it doesn't, turn 7mm Nut (A) slightly in either direction
as necessary to correct it. Turn clockwise to lower the
head and counterclockwise to raise it.

Black 7mm Nut (A)
Screw (C)
Control! Head
Lower Edge
of Tape
Black
Line
bower
Edge
Screw
(B)
of Control Head
Fig. M14
9-C. CONFIRMATION OF TILT OF A/C HEAD
Purpose :
To
confirm
that
the
tape
run
is
well
stabilized.
in
particular,
confirm
that
the
tape
properly
picks
up
the
Audio Signal at the upper part and the Controt Signal at
the jower part.
Symptom of Misadjustment :
If
the
tilt
of
the
A/C
Head
is
poorly
adjusted,
the
tape
will
be eventually damaged.
1.
Play
back
a
T120
Cassette
tape
and
confirm
that
the
tape
runs
properly
between
lower
and
upper
Iimits
of
P4
post.
Also
confirm
that
the
tape
is
running
smoothly.
2.1f
adjustment
Is
required,
turn
Black
Screw
(C),
in
Fig.
M14,
clockwise
until
curling
Is
apparent
at
lower
edge
of
P4.
Then
turn
Black
Screw
(C)
counterclockwise
until
the
curling
smoothes
out.
Tape
Running
A/C
Head
in
Oirection
Condition
ae
tilted
Condition
turn
for
correction
9-D.
HEIGHT
AND
AZIMUTH
ADJUSTMENT
OF
AIC HEAD
Purpose :
To
adjust
the
position
and
height
of
the
A/C
Head
so
that
it meets the tape tracks properly,
Symptom of Misadjustment :
If the position of the A/C Head is not properly adjusted,
the Audio S/N Ratio Is also poor.
1, Connect the oscilloscope to the audio output jack on the
rear of the deck.
2. Play back the monoscope portion (6 kHz, Mono} of the
alignment tape (8 627 000 540).
3. Adjust Black Screw (B) on the head base in Fig. M14 so
that the output level is at a maximum.
6kHz-Audio
Maximum
Fig. M16
4.
Readjust
7mm
Nut
(A)
shown
in
Fig.
M14
for
maximum
output.
5.
Disconnect
the
oscilloscope.
9-E£.
HORIZONTAL
POSITION
ADJUSTMENT
OF
A/C
HEAD
Purpose :
To
adjust
the
Horizontal
Position
of
the
A/C
Head.
Symptom of Misadjustment :
If
the
Horizontal
Position
of
the
A/C
Head
is
not
Properly
adjusted,
maximum
envelope
can
not
be
obtained
at
the
Neutral
Position
of
the
Tracking
Control
Circuit.
Piace
a
jumper
between
TP6003
and
GND
on
the
System
Control
Section
of
the
Main
C.B.A.
to
defeat
Auto
Tracking.
1.
Eject
the
tape
and
reinsert
it
again,
this
will
access
the
Neutral
Tracking
position.
Connect
the
oscilloscope
to
TP3002
on
the
Video
Signal
Process
Section
of
the
Main
C.B.A,
Use TP6205 as a trigger.
2.
Play
back
the
monoscope
portion
of
the
alignment
tape
(8
627
000
540)
and
confirm
that
the
RF
envelope
appears,
as
in
Fig.
M
18
-
1.
3.
If
adjustment
is
requiréd,
set
the
H
-
Position
ADJ.
Fixture
into
the
slot
of
the
Adjustment
Nut
and
slowly
turn
either
right
or
left
so
that
the
envelope
is
at
a
maximum.
-24-
4.
Before
finding
the
center
of
the
maximum
period
of
the
envelope,
rotate
the
Adjustment
Nut
back
and
forth
slightly
to
confirm
the
limits
on
either
side
of
the
maximum
period.
5.
Push
the
Tracking
Control
UP
Button
(on
the
Front
Panel
Ass‘y)
several
times
(count
the
number
of
timas
pushed)
until
the
maximum
envelope
is
reduced
to
1/2.
6. Re - set the tracking to the neutral position by ejecting
the tape and reinserting it. Push the Tracking Control
DOWN Button {on the Front Panel Ass'y) several times
(count the number of times pushed) until the maximum
envelope is reduced to 1/2.
7. if the number of pushes Is not the same, then rotate the
adjustment nut back and forth stightly to find the center
point. Then repeat the above procedure until the center
point is determined.
Adjustment Nut
\
Fig. M17
9-F. CONFIRMATION/ADJUSTMENT OF
ENVELOPE OUTPUT
Purpose :
To achieve a satisfactory picture and secure precise
tracking.
Symptom of Misadjustment :
if
the
envelope
is
output
poorly,
much
noise
will
appear
in
the
picture.
Then
the
tracking
will
lose
precision
and
the
Playback
picture
will
be
distorted
by
any
slight
variation
of
the tracking control circuit.
Place
a
jumper
between
TP6003
and
GND
on
the
System
Control Section
of
the
Main
C.B.A.
to
defeat
Auto
Tracking.
1.
Eject
the
tape
and
reinsert
it
again,
this
will
access
the
Neutral
Tracking
position.
Connect
the
oscilloscope
to
TP3002
on
the
Video
Signal
Process
Section
of
the
Main
C.B.A.
Use
TP6205
as
a
trigger.
2, Play back the monoscope portion of the alignment tape
(8 627 000 540) and adjust the height of posts P2 and P3
watching the scope display so that the envelope becomes
as flat as possible.
(VIAN - max 2 0.7, V2/V - max 2 0.8)
If
adjustment
Is
required,
turn
top
of
post
with
Post
Adjustment
Screwdriver.
For
adjustment
of
P2
and
PS,
refer
to
Item
9-
A
and
It's
Note.
-25-
Theoretical Waveform
ef fe i
Viv ~ max 0.7 V2/V ~ max 2 0.8
Fig. M18-1
3. When the scope display is as shown in Fig. M18 - 2,
adjust the height of P2 so that the waveform looks like
Fig. M18- 4.
Dropping envelope level at the beginning of track (P2)
Fig. M18-2
4, When the scope display is as shown in Fig. M18~ 3,
adjust the height of P3 so that the waveform looks like
Fig. M18~ 4,
Dropping envelope level at the end of track (P3)
Fig. M18-3
5.
When
P2
and
P3
are
adjusted
properly,
there
is
no
Envelope
Drop
at
the
beginning
or
end
of
the
track
as
shown
in
Fig.
M18~-
4.
Remove
the
jumper
wire.
Envelope is adjusted properly
{No Envelope Orop)
en
Fig. Mi8-4

Note:
Upon completion of adjusiment of P2 and P3, tighten the
Black Lock Screws on P2 and P3 using the Lock Screw
Wrench. Then confirm the Horizontal Position of A/C
Head by pushing the Tracking Contro! Up or Down
Buttons (on the Front Panei Ass’y) alternately to check
the symmetry of the envelope. And if required, perform
“Horizontal Position Adjustment of A/C Head”.
10. ADJUSTMENT OF FG HEAD GAP
Purpose :
To properly pick up the FG Signal.
Symptom of Misadjustment :
lf the FG Signal is not properly picked up, Servo
Operation can not be achieved.
* Equipment Required :
Oscilloscope
Fine Adjustment Screwdriver ..............0 (8 619 497 816)
* Specification : 0.1 ~ 0.13 mm
1. Remove the Mechanical Chassis from Bottom Case. And
then piace the Mechanical Chassis up side down (Refer
to Service Notes and Cautions Item A).
2. Slightly loosen 2 Black Screws (A) and set the Fine
Adjustment Screwdriver Into Hole (B) as shown in
Fig. M19. Turn screwdriver clockwise until the FG Head
touches the rotor. Then turn it slightly counterclockwise to
the clearance as specified.
3. Tighten 2 Black Screws (A) in Fig. M19.
Screw (C) 0.1 - 0.i3m
Capstan Stator a
Capstan Rotor Capstan Belt
Unit
Fig. M19
Note:
1. Do not touch the outside circumference of the rotor
surface with any tool and keep magnetic material
away from the rotor magnet (especially metal
particles).
2. Upon completion of above procedure, confirm that
the FG Head output level is more than 10mVp- p,
see preparation below. If the level is not more than
10mVp - p, re- adjust the FG Head Gap so that the
FG Head output ievel is more than 10MVp - p.
(Preparation)
1) Supply a Video Signal to the Video Input Jack on the rear
of the deck.
2)
Insert
a
cassette
tape
and
place
the
unit
in
SLP
recording
Mode.
3) Connect the oscilloscope to the terminals of the FG
Head.
11. REPLACEMENT OF CAPSTAN ROTOR
OR STATOR UNIT
1. Remove the Capstan Belt (Fig. M19).
2. Remove Screw (C) and the Capstan Stator Stopper in
Fig. M19.
3. Carefully pull out the Capstan Rotor Unit, taking care so
as not to lose the 2 Dust Seals as shown in Fig. M20.
Thrust Adjust Screw
Dust Seals
CAPSTAN STATOR
Coil
CAPSTAN ROTOR Magnet
Capstan
& Stator Unit
Capstan
Holder Boss
Centered
Black Screws (D)
Fig. M20
4. Unplug Connector P1503 on the Capstan Stator Unit.
Remove 3 Black Screws (D) and then itt the Capstan
Stator Unit.
5. Replace the new Capstan Stator Unit and then tighten 3
Black Screws (D). Plug Connector P1503 on the Capstan
Stator Unit.
Note:
When reinstalling the Capstan Stator Unit, the Capstan
Holder Boss must be centered within the hole in the
Capstan Stator Unit.
6. Before replacement of new Capstan Rotor Unit, loosen
the Thrust Adjust Screw completely.
7. Replace the new Capstan Rotor, carefully inserting the 2
Dust Seais as shown in Fig. M20.
Note:
1) The Capstan Rotor Unit ts supplled as a replace-
ment part in a complete unit with a spring loaded
Capstan Pulley. Do not remove the Retaining Ring
on the Capstan Pulley of the Capstan Rotor Unit.
2) Hold the new Capstan Rotor Unit firmly, when
replacing It, so the rotor will not be pulled toward the
stator too quickly (due to magnetic force), Placing
some paper on the coils before rotor installation
may prevent accidental damage to the coils if the
above caution is not observed.
3) During replacement, do not touch the Capstan Shaft
with any hard material like drivers or tweezers.
8. Re- instal! the Capstan Stator Stopper with Screw (C), in
Fig. M19.
+++sADJUSTMENT OF THRUST ADJUST SCREW AND
DUST SEALS: ---
9. Re- install the Capstan Belt and while exerting pressure
to turn the Center Pulley Unit, tighten the Thrust Adjust
Screw slowly until the Capstan Rotor just starts turning.
10. At the point where the Capstan Rotor starts turning,
tighten the Thrust Adjust Screw another 180° CW.
11. Upon completion of above procedure, confirm that these
2 Dust Seals are positioned as shown in Fig. M21. And
then, wipe off the Capstan Shatt to remove oil, grease
and dust.
Fig. M21
OF

12. DISASSEMBLY/ASSEMBLY PROCEDURES
OF MECHANISM
This
procedure
starts
with
the
condition
that
the
cabinet
parts,
Cassette
Up
Unit
and
Mechanical
Chassis
have
been
removed.
Also,
all
the
following
procedures
for
adjustment
and
part
replacement
should
be
performed
in
STOP
Mode.
When
reassembling,
perform
the
step(s)
in
the
reverse
order.
STEP {STAR REMOVE
ILOC. {-!NG PART
No. = |No.
* UNHOOK/UNLOCK
| | PINCH CAM CAP ea
[RELEASE /UNPLUG
PRESSURE ROLLER :
ARM UNIT t
JUNSOLDER
PRESSURE ROLLER :
LIFT CAM :
PRESSURE H
See, Alignment Procedures for Mechanism
ltem 13-8.
(+) See,Alignment Procedures for Mechanism
REDUCTION
GEAR:
tem
13-2.
See, Fig. A2.
(+} See, Alignment Procedures for Mechanism
item 13-6.
2(C-2),82(P-1).#(P-2)
|
1.)
See,
Setting
Condition
in
Fig.
OMS.
< Note 2 >
$(P~3),¢(L-2),(R-1)
{+}
See,
Position
Adjustment
of
Tension
Post.
ADJUSTMENT
#CONDITION
=
ea
4
!
SETTING PLATE ;
SWITCH CAM GEAR T
TENSION BAND ig
ASS'Y :
}@| 2 | PSSECTORGEAR :T
PS ARM UNIT tT
[®@ | 4 | TAKEUP REEL TABLE!
See, Alignment Procedures lor Mechanism
ltem 13-7.
(+) STOP < Note 3 > See.Height Adjustment of
PS Arm Unit.
t(L-3} <Note2>
ovolcolo’g
| 22 [23] 2 [2/2 (82/82 |22
A=[|32[la=
(N-1),(W- 1), #(P-4)
4
(R-2) (+) <Note 5 > See,Height Adjustment of Reel
4
SUPPLY REEL TABLE:
fel lime ie
Oa ee See, Setting Condition in Fig. OMB.
fof « CENTER PULLEY Capaeabek (+) See, Fig. DMO.
< Note 2 >
ls | aT See a ne Aves Procedures for Mechanism
SPAN LIMITER :B
SUN GEAR 8B
12.1 | MAINCAMGEAR =: B
DETENT ARM ;
(S~ 2},3(R-5),(W- 2)
[en Dee ee
(+) See, Alignmant Procedures for Mechanism
W-3) tem 13-4.
(+) See, Alignment Procedures for Mechanism
tems 13-2 and 13-3.
(+} See, Alignment Procedures for Mechanism
tem 13-1,
ce)
|
eagles
it
SUB CAM GEAR i
RETAINER
GEAA
:
B
{+)
See,
Alignment
Procedures
tor
Mechanism
ASS'Y
:
tem
13-3.
: (+) See, Alignment Procedures for Mechanism
17 | SECTOR GEAR UNIT 8 ltem 13-5 .< Note 6 >
og =e 2
-28-
REMOVAL INSTALLATION
STAR REMOVE
LOC. |-ING PART * UNHOOK ADJUSTMENT
No. JUNLOCK/RELEASE #CONDITION
JUNPLUG /UNSOLDER
@ | OADING CAM GEAR: 8 {+) See, Alignment Procedures for
ui i
RING GEAR : B (+) See, Alignment Procedures for
: Mechanism Item 13-4.
RELEASE LEVER i
UNIT 4
|
@
|
(+}
See,
Setting
Condition
in
Fig.
OM12.
INTERMEDIATE
Hy
|
|
GEAR
i8
B(L—
4),
(WHA)
<
Note
2
>]
cee
ecseesseeeeeercerenee
| @ | 27 fonveoisk == | DISK 8
TEP
jo.
LOADING ARM — S B
UNIT
S$
Ne
®
#{L-5)
H (+) See, Alignment Procedures for
LOADING
ARM-T
Mechanism
Item
13-5.
UNIT : 8 #(L-6)
#(C-5) <Note2>
+(C-8) < Note 2>
®@ SUPPLY REEL GEAR :
UNIT H
TAKEUP REEL GEAR : ,
UNIT :
PLAY ARM UNIT 8
| @ | 15 | STOPPER BASE :
ASSY i
| @ | 2 | TENSION ARM BASE i T (8-5), (+) See, Measurement and Adjustment of
UNIT :8 #(L-8) Back Tension.
|@| > | peda HOLDER ; Tt Jom [as (+) See, Replacement of Capstan Rotor or
: Stator Unit.
MODE SELECT : (S-7) See. Ali
> it . Alignment Procedures for
@ | 2 | AIC HEAD UNIT i T Ea (N-2).(W- 3), #(P-5) (+) See, Confirmation of A/C Head Height.
ele larc ite | ——— —|
: * Connections
$ * Connections
PLAY SET ARM B
SOLENOIDLEVER :
@ | an [SCLENOIDUEVER Ty Tomson |e) enn
LOADING POST BASE:
[a SRE POTESE + [ou [sere woe
LOADING POST BASE: Spee a ier
| @ | + | D.0 CYLINDER UNIT ; 8 ome | as-1) See, Replacement of D.0. Cylinder Unit.
SUB LOADING ARM:
UNIT iT | ome $(P=7), C(L=10} | cee teeeessssssseeneree
List of Abbreviations:
T= Top; B= Bottom
(R- 1)=Retaining Ring (R-1); 2(P-1)=2 Springs (P-1); (S-1)=Screw (S- 1);
(W~ 1)=Washer (W- 1); 3(S-5)=3 Screws (S-5); (C- 1)=Cut Washer(C- 1);
(N-1)=Nut (N- 1); (L- 1)=Locking Tab (L=1)
(+) : Refer to Exploded Views for Lubrication information.
-29-

A/C
Head
Spring
Hooking
Position
N~2)
@) @) G7) (2)
(N-2)
(P-5) 1} (HeS)
Ansicht von oben
Top view
(L-2)
(R-1)
Projection on
Side View the Chassis
<
Mode
Select
Switch
Projection
of
the PS Arm Unit
Fig. OM4
Main Brake Springs Hooking Position
Ansicht von unten
Bottom view Capstan Belt
Projection on
the Chassis
(C-1) ey (P=8)
Bottom View
Z
Setting
Condition
Setting Condition
Pins of Main
Stopper
Base ASS'Y Setting Condition
Fig. OMB
Fig. DMS
- 30- ac

Fig. OM9
(L-6)
(L-5)
Tab (A)
Tab (A}
le
Chassis Solenoid
(0/7/77 Lever Unit
30%
Unsolder
{S-8)
Unsolder
Unsolder
Fig. OMI4
(S-91—_F
Fig. DMI5
Unsolder
Unsolder
ae
Fig. DM16
Reference <Notes> in Table 12:
1,
Wiggle
it
sideways
to
property
seat
the
Pressure
Roller
Arm
Unit.
2.
This
cut
washer
is
not
reusable.
If
removed,
install
a
new
one.
3.
Install
the
P5
Arm
Unit
so
that
the
projection
of
the
PS
Arm
Unit
is
positioned
in
back
of
the
projection
on
the
chassis,
as
shown
in
Fig.
DM7.
4.
Install
the
Cam
Follower
Arm
Unit
so
that
the
pin
on
the
Cam
Follower
Arm
Unit
meets
the
Inner
slot
of
the
Main
Cam
Gear.
5.
When
reinstalling
the
Supply
and
Takeup
Reel
Tables,
clean
the
rotating
surface
of
them
with
a
soft
cloth,
6.
Ensure
the
Tape
Tension
Arm
is
positioned
as
shown
in
Fig.
DM1
for
STOP
Mode.

13. ALIGNMENT PROCEDURES OF
MECHANISM
The mechanism of this model is mostly engaged to the
System Control Circuit, through the mode select switch.
Therefore the relation between the mode select swilch and
the cam gear decides all further mechanical movement of
the mechanical paris such as levers, gears, rollers and so
on. For specific removal and instailation procedures, refer to
the Disassembly/Assembly Procedures on page 28.
Through
Pressure
Reduction
Gear
lf these parts are nol propertly aligned and only off by one
tooth, the «rit will be unloaded or stopped.It may result in
damage to the mechanical or electiical parts. The overall
mechanical condition of the bottom and top views are
shown in Fig. At and Fig. A2. This mechanical adjustment
is performed in the Half Load Stop (FF/REW) Mode. The
detail of mechanical condition will be described later.
Clutch Disk ASS‘Y <ADJUSTMENT MODE >
STOP_MODE
Sector Gear Unit
Loading Arm-T Unit
Loading Cam Gear
Loading Arm-S Unit
Retainer Gear ASS'Y
Main Cam Gear
Detent Arm
Through tloles
Ring Gear
Sub Cam Gear
Fig. Al Bottom View of Overall Mechanical Condition
Mode Select
Switch
Pressure Roller
Lift Cam
Pressure
Reduction
Gear
Sub
Cam Gear
Fig. A2 Top View of Overall Mechanical Condition
Important Note :
All through hole alignments must be made precisely so
that the complete procedure will exactly align the gear
teeth. If the alignment is off by only one tooth then the
mechanism will not operate properly.
13-1. ALIGNMENT PROCEDURES OF SUB
CAM GEAR, RING GEAR AND DETENT
ARM
1. Install the Ring Gear so that the holes on Ring Gear are
exacily in line with the holes on chassis as shown
Fig. A3.
2. Install the Sub Cam Gear so that the hole on Sub Cam
Gear is exactly In fine with the hole on chassis, at the
same time, the small hole (located just outside of large
hole) on Sub Cam Gear is exactly in line with the hoie on
Ring Gear.
3. Instatl the Detent Arm.
-34-
13-3. ALIGNMENT PROCEDURES OF
MAIN CAM GEAR, RETAINER GEAR
Capstan’
Through *
Hele
She
ton
‘
Si
(Large
Hole}—~
small
tlole
ey
fe
ASS’Y AND LOADING CAM GEAR
Holes Through
“4
ee
1.
Install
the
Retainer
Gear
ASS'Y
so
that
the
Holes
on
the
i
Retainer
Gear
ASS'Y
aligns
with
Holes
on
the
Ring
Gear
aN
i
oe
and
Holes
on
the
Chassis.
To
lacititate
aligning
the
three
Tale
holes
use
a
smai!
hex.
wrench
or
a
metal
pin.
2. Install the Loading Cam Gear so that the Hole on the
Loading Cam Gear aligns with the Hole on the Retainer
oe Gkar Gear ASS'Y.
|
3.
Confirm
that
the
Hole
on
the
Main
Cam
Gear
aligns
with
Da |
Arm FB Cie the Hole on the Retainer Gear ASS'Y.
Tab
Position
Chassis
Retainer Gear ASS‘Y Through
~~ zal joles
Ring Gear ‘o ZZZZZE , WHE,
_ ANE
Fig. A3
Chassi
13-2, ALIGNMENT PROCEDURES OF
MAIN CAM GEAR AND
Capstan
PRESSURE REDUCTION GEAR Through Holes
1. install the Pressure Reduction Gear from top side of
chassis.
2. Install the Main Cam Gear onto the Sub Cam Gear so
inat the smail hole on Main Cam Gear Is exactly In line
with the small hole on Pressure Reduction Gear. And the
large hole on Main Cam Gear is tn line with the large hole
on Sub Cam Gear as shown in Fig. A4.
Pressure Reduction Gear
Loading
13-4. ALIGNMENT PROCEDURES OF SUN
GEAR AND CLUTCH DISK ASS’Y
1. install the Sun Gear so that the Holes on the Sun Gear
aligns with the through Holes on the Retainer Gear
ASS'Y, Ring Gear and chassis. To facilitate aligning the
four holes use a small hex. wrench or a metal pin.
Cam Gear 2. Install the Clutch Disk ASS'Y so that the small Hole on
the Clutch Disk ASS'Y aligns with Hole on the Sun Gear.
Through
Holes
(Large Hole)
Fig. A4
-35-

13-5. ALIGNMENT PROCEDURES OF
Capstan LOADING ARM-T UNIT,
Se SupsGear LOADING ARM- S UNIT AND
SECTOR GEAR UNIT
Cut Washer
1. Set the P2 and P3 posts to unloading position, then
install the Loading Arm- T Unit and S$ Unit so that the
hole on Loading Arm- T Unit is exactly in fine with the
hole on Loading Arm- S Unit.
ah
tole
2.
Install
the
Sector
Gear
Unit
so
that
the
hole
on
Sector
Small
Gear
Unit
is
exactly
In
fine
with
the
projection
mark
on
Hole
Loading
Arm-
T
Unit.
3.
Install
the
Span
Limiter
using
Retaining
Rings
and
Screw,
Fig.
A7.
Through
Holes Sua Gaar
wma | me CD
zm |\aeaz @———- Retainer Gear ASS'Y
ee
“Ring Gear
ZANE.
| ™ Chassis
Fig. A6
Capstan Belt Sector Gear Loading Loading
Arm-T Unit Arm-S Unit
Projection
Retaining
Ring
Span Limiter
-36-
13-6. ALIGNMENT PROCEDURES OF
LINK GEAR
Note:
Before this alignment, Sub Cam Gear position (and
positions of all bottom side gears) must be in their correct
alignment position for Half Load Stop (FF/REW) Mode as
previously described. Push down to seat the Sector Gear
Unit, refer to 13-5. Instalf the Link Gear so that the Line
on the Link Gear |s parallel to the side line of Mechanical
Chassis, as shown in Fig. A8.
Link
Gear
Sub Cam
Gear
Smali Hole
Fig. A8
13-7. ALIGNMENT PROCEDURES OF 13-8. ALIGNMENT PROCEDURES OF
P5 SECTOR GEAR AND P5 ARM UNIT PRESSURE ROLLER LIFT CAM,
MODE SELECT SWITCH AND
1. install the P5 Sector Gear so that the hole of P5 Sector PRESSURE REDUCTION GEAR
Gear aligns with the last tooth on the PS Arny Unit, refer
to Fig. AQ. 1, Push P5 Arm Unit clockwise until it stops and hoid it in
this position. Then install the Pressure Aoller Litt Cam so
Mode Select PS that Hole on the Mode Select Switch aligns with Hole on
Switch the Pressure Roller Lift Cam and Projection on Pressure
Rolier Lit Cam aligns with Smali Indentation on Pressure
Reduction Gear when pushing tne P5 Arm Unit com-
pletely as indicated by the arrow.
Pressure
Roller
Arm Unit
Pressure
Roller
Lift Cam
PS Arm Unit
Pressure
Roller
Litt Cam
Fig. AQ Pressure
Reduction
Gear
Projection
Fig. A10
$37

14, DISASSEMBLY/ASSEMBLY AND
ADJUSTMENT OF CASSETTE UP UNIT
foc, | - ING PART REMOVE
No. | No. * UNHOOKUNLOCK CIDE
Fig.
No.
SUB FRAME UNIT IR | om |
Cee (+) See, Adjustment of Cassette Up Unit
Cassette Holder Unit
rot]
CO [+ [atenneoure ast
PO Joemrouee a
TO [= [tosonaweronowr 8 [ow |
FO [e [emeroneien a | ow |
Po [7 [woe rf owe |
ro |
| owe |
a fone remeron
Po [+ [aenowoenassy 7]
ee
Tar [oe reanet or rf oe
List of Abbreviations:
R = Right, L = Left ; 3 (L- 1) = 3 Locking Clips (L~ 1)
(+): Refer to Exploded Views for Lubrication information.
Rear Frame Ass'y
®Loading Motor Unit
aS (S- 2)
nw eae
Loading Belt
@Gear Pulley
@ Intermediate Gear
@® Side Frame R Unit
(S-4)
<< vy j E
~ oo.
~sg(c- 2 és,
vill
a
@Wiper
Arm
s,
Panel Opener @Sub Frame Unit
Fig. DA1
Fig. DA2
- 38- : -39-