- 5 -
TROUBLE SHOOTING
Is t
h e v
O
lt ag e at
pin 3 and 5 of CN 811
about 5. 6V?
POW
ER DO ES NOT TURN ON
DOES NOT LI GHT
DISPLAY
Y
N
Check IC48 3 and periph eral circ ui t.
Is the voltage at pi n 3
of IC852 about 5. 0V?
Is the volt ag e at pin 3
of IC851 about 3. 3V?
Check IC852 and peri pheral ci rcui t.
Ch eck IC851 and peripheral circui t.
Y
N
Y
N
Check FL2 line
of
POWER BLOCK.
Is the voltage at
pi n 1 and 2 of FL 831
about -2 8V?
N
Y
Re pl ac e FL
or IC
LO ADER DO ES NOT ACCEPT OPEN/CLO SE
Is th e voltag e at pi n3
and 14 of IC160 about 9V?
Is the lose conn ection at
CN160 and CN16 2
to LOADER
.
N
Ch eck 9V li ne of
POWER BLOC K.
Y
Y
Check each other connection to
LOADER
.
N
Check IC800 and
peripheral
ci rc ui t.
When AC IN,
LOADERMOTOR turn?
Chec k OPEN or SHORTat pin 29, 26, 27
an d 24, 32 of IC800.
Is the volt ag e at pin 4
of IC850 about 1. 8V ?
Check IC850 and peripheral ci rcui t.
N
Y
Check IC800, IC818, IC822
and peripheral circuite.e
Y
N
Is th e volt age at
pi n 31 and 32 of FL
abou t -2 5V?
Is the volt age at
pi n 6 and 24 of IC
about 5V?
Is the volt age
at pi n 15 of IC
abou t -3 0V ?
Check FL1 line
of
POWER BLOCK.
Check IC
and
peripher al circ ui t.
Ch eck -3 0V line
of
POWER BLOCK.
N
N
N
Y
Y
Y
PICTURE mode is
BLACKand WHITE?
Change PI CTURE mode to
STANDARD .
Y
N
NO COLOR PL AYBACK PICTURE OF
COMPOSITE
VIDEO OUT
X8230 osc is 27.0 00MHz?
Ch eckX8 230and peripheral
circui t.
N
Y
Check IC800 or
change IC800.
XE, UK only
831
831
831
831
831
831
ex. PRAM open ?
All manuals and user guides at all-guides.com
all-guides.com