EasyManua.ls Logo

Sharp VC-90ET

Sharp VC-90ET
109 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
CAPSTAN
SERVO
TROUBLESHOOTING
FLOW
CHART
NO.
11
Capstan
servo
does
not
function.
Only
REC
mode
inoperative.
Only
PB
inoperative.
Are
REC
and
/or
PB
mode
inoperative
?
—
yes
Is
there
the
clock
input
atpin
©)
of
1€701?
(4.43
MHz
in
PAL/
MESECAM/
SECAM
mode,
3.58
MHz
in
NTSC
mode;
level
at
about
0.3
Vp-p)
Check
the
main
PW8
and
the
line
between
the
main
PW8
and
pin
@)of
IC701.
yes
ves
Check
the
capstan
FG
No}
Does
there
appear
the
Does
there
appear
the
Ino
signal
line
between
capstan
FG
signal
at
Composite
sync
at
pin
the
harness
AM-MC
pin
@)
of
C701?
G2)
at
C701?
and
Q709.
:
YES
Is
there
capstan
AFC
signal
atpin
@)of
1€701
?
Is
there
CTL
signal
YES
output
at
pins
@
@9)
Reptace
!C701.
Does
there
appear
CTL
signal
at
pin
G6)
of
ES
1€701?
NO
YES
Does
CTL
amplifier
Check
the
line
Is
there
capstan
APC
ls
there
the
capstan
Does
there
appear
CTL
{NO|
Does
CTL
amplifier
cireuit
of
1C701
(pins
between
pin
@
of
signal
at
pin
@)
of
pact
ag
pin
(0)
of
on
-
pin
@of
circuit
of
1C701
(pins
@
to
@
)
operate
1C701
and
pin
@
of
1€701
?
-
:
®
to
@))
operate
normally
?
1€701.
normally
?
YES
yes
NO
.
NO
Check
the
composite
Do
the
circuits
around
Replace
defective
Check
the
capstan
®
or
a
nes
oe
Replace
IC701.
sync.
signal
line.
pins
to
of
parts.
motor
unit.
Replace
IC701.
C701
Operat
normally
?
YES
Ispin
©
of
1c801
normal
?
Replace
1C801.
isthe
harness
AH-MH
{NO
norma
|
Replace
the
harness
AH-MH.
__Y
ves
at
Does
the
A/C
hea
operate
normally
?
Replace
the
A/C
head.
Replace
(C701.
YES
Adjust
the
height
of
the
A/C
head.
e@
capstan
1306-9A

Table of Contents

Related product manuals