Blaupunkt MVP 01 - Page 4

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.