Sharp LC-20VM2E Service Manual page 31

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