- 5 -
TROUBLE SHOOTING
Is t
h e v
O
lt ag e at
pin 4 and 5 of CN 811
about 5. 5V?
POW
ER DO ES NOT TURN ON
DOES NOT LI GHT
DISPLAY
Y
N
Check IC48 3 and periph eral circ ui t.
Is th e volt age at pi n 3
of IC852 abou t 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 FL1 line
of
POWER BLOCK.
Is the voltage at
pi n 1 and 2 of FL601
about -2 8V?
N
Y
Re pl ac e FL601 or IC601.
LO ADER DO ES NOT ACCEPT OPEN/CLO SE
Is th e voltag e at pi n10
and 22 of IC160 about 9V?
Is the lose conn ection at
CN100, CN150, CN160, CN161
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?
Check OPEN or SHORT at pi n 64,6 8, 73
an d 74 of IC800.
Is th e volt ag e at pi n 3
of IC850 about 1. 9V ?
Check IC850 and peripheral ci rcui t.
N
Y
Is th er e wavefo rm at
X8000 about 3. 0Vp-p?
Chec k X8000,IC800 and peripheral
circ ui t.
Rewr it e ROM DATA .
N
Y
Y
N
Is th e volt age at
pi n 31 and 32 of FL601
abou t -2 5V?
Is the volt age at
pi n13 and 43 of IC601
about 5V?
Is the volt age
at pi n 30 of IC601
abou t -3 0V ?
Check FL2 line
of
POWER BLOCK.
Check IC852 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
COMPOSI TE
VI DEO OUT
X8230 osc is 27.0 00MHz?
Ch eckX8 230and peripheral
circui t.
N
Y
Check IC820 or
change IC820.
