Service manual
TROUBLE SHOOTING TABLE
(Continued)
1
No
colour
or unusual tone (NTSC, PAL)
1
Is there chroma signal input at pin
Go back to the signal processing
Are there signal outputs at pins
No ------__--___--_I
(46)(R-Y)
and
(45)(B-Y)
of
IC801?
Yes
---m--------e--_
,
Check the oscillation of X801 and
f
+
,
X802, and their peripheral circuits,
f
----------_---__
--_--------__--_I
t
Check
IC803,
IC804
and their
f
, peripheral circuits,
I
--------------__I
1
No
colour
or unusual tone (SECAM)
1
Is there chroma signal input at pin
(20) of
IC802?
No
1
Yes
f
Go back to the signal processing
I
block.
i
.
Are there signal outputs at pins
No
L---------------I
(1
l)(R-Y)
and
(12)(B-Y)
of
IC802?
Yes
I
----------___--_
I
Check the X802 oscillation,
IC802
1
f
and their peripheral circuits,
I
I
--------------__
------~~--~~~-~~I
I
Check
IC803,
IC804
and their
t
I
peripheral circuits.
I
----------__----I
No or unusual
Y
signal
I
Is there
Y
signal input at pin
(21)
of
No
IC8017
Yes
Go back to the signal processing
I
~~
-~~+,
No
:::,~~:11-1(
Check
IC801
and its peripheral
f
Is there
Y
signal output at
pm
(Ii’)
of
*
I
----------______
, Check
IC811
and its peripheral
1
XG-XVI
E/A
-----__------_-_
I
circuits as well as
IC805
‘(AGC).
t
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
I
t
Check
IC803
and its peripheral
t
circuits.
I
-----___-----___I
39