Read Sharp LC-20VM2E (serv.man2) Service Manual online
31
LC-20VM2E
LC-121M2E
LC-150M2E
LC-150M2E
No colour appears
(N358)
(N358)
Is 3.5795 MHz
input into the
pin 10 of IC801?
input into the
pin 10 of IC801?
Check X801 and
its peripheral
parts.
its peripheral
parts.
No colour appears
(N443,PAL)
(N443,PAL)
YES
Is the C/Y signals at pins 13 and 15 of IC801 normal ?
Is the output at pins 10 and 11 of IC2802 normal ?
NO
Check X802 and
its peripheral
parts.
its peripheral
parts.
NO
Is 4.4336 MHz
input into the
pin 8 of IC801?
input into the
pin 8 of IC801?
YES
YES
Check
Peripheral
parts of IC853.
(When inputting
except NTSC)
Peripheral
parts of IC853.
(When inputting
except NTSC)
NO
Is the composite
signal which is
input into the pins
13 and 15 of
IC801 normal?
signal which is
input into the pins
13 and 15 of
IC801 normal?
Check Peripheral
parts of IC853.
parts of IC853.
NO
YES
Is 4 MHz input
into the pin 8 of
IC2802?
into the pin 8 of
IC2802?
Check X2850
and its peripheral
parts.
and its peripheral
parts.
NO
YES
Check Peripheral
parts of IC2802.
parts of IC2802.
NO
Is the output at pins 29 and 30 of IC2801 normal ?
Is the input at pins 51 and 52 of IC801 normal ?
Check Peripheral parts of IC801.
YES
Check Peripheral
parts of IC2801.
parts of IC2801.
YES
YES
NO
Check Peripheral
parts of IC406,
IC451.
parts of IC406,
IC451.
NO
No colour appears
(PAL-M)
(PAL-M)
Check X803 and
its peripheral
parts.
its peripheral
parts.
NO
Is 3.5756 MHz
input into the
pin 9 of IC801?
input into the
pin 9 of IC801?
Check IC7001,
IC7002, IC7100
and its peripheral
parts.
(When inputting
NTSC)
IC7002, IC7100
and its peripheral
parts.
(When inputting
NTSC)
YES
NO
No colour appears
(SECAM)
(SECAM)
Check X802 and
its peripheral
parts.
its peripheral
parts.
NO
Is 4.4336 MHz
input into the
pin 8 of IC801?
input into the
pin 8 of IC801?
YES
No picture in RGB mode.
Is input voltages
at pins 33~35 of
IC801 normal?
at pins 33~35 of
IC801 normal?
Is output voltages
at pins 41~43 of
IC801 normal?
at pins 41~43 of
IC801 normal?
Is input voltages
at pins 63, 110 of
IC1201 normal?
at pins 63, 110 of
IC1201 normal?
Check IC1201,
IC1203, IC801 and
its peripheral parts.
IC1203, IC801 and
its peripheral parts.
Check pins 33~35 of
IC801 and its
peripheral parts.
IC801 and its
peripheral parts.
Check IC1203, IC2001
and its peripheral parts.
and its peripheral parts.
YES
YES
YES
NO
NO
NO
Check pins 23~25, 32
of IC801 and its
peripheral parts.
of IC801 and its
peripheral parts.
