Sharp LC-15B9U-S Service Manual - Page 29

No TV, Input 2 or Input 3

Get Sharp LC-15B9U-S - 15inch LCD TV PDF manuals and user guides View all Sharp LC-15B9U-S manuals
Add to My Manuals
Save this manual to your list of manuals

Page 29 highlights

All pictures do not come out. No TV, Input 2 or Input 3 pictures come out. No pictures come out . No TV pictures come out. No Input 2 pictures come out. No Input 3 pictures come out. No S video pictures come out. No Input 1 pictures come out. Check if the adjustment process menu of the microcomputer is set properly. TROUBLE SHOOTING TABLE (Continued) Does the No Check test pattern IC801 and of the LCD its controller peripheral come out? circuitry. Yes Are the input and output of IC801 as specified? Are the input and No Check IC3401 and output of its peripheral IC3401 as parts. specified? Yes Is the input No at pin (40) of IC801 as specified? Check the IC801 VIDEO line and its peripheral parts. Are the voltages at pins (6), (7) and (9) of the No Check the power supply line. tuner as specified? Yes Is the output at pin (19) of the tuner as specified? No Check the tuner and its peripheral parts. Yes Is the input at pin (47) of IC3401 as specified? Yes No Check the line in question. Is the input No Check the at pin (1) of IC3401 as line in question. specified? Yes Is the output at pin (43) of IC3401 as specified? Yes No Check IC3401 and its peripheral parts. Is the input No Check at pin (40) IC801 and of IC801 as its input specified? line and peripheral parts. Is the output at pin (43) of IC3401 as specified? Yes No Check IC3401 and its peripheral parts. Check the line in question. Is the input No Check the at pin (8) of line in IC3401 as question. specified? Yes Are the inputs at pins No Check the SY line, SC (3) and (5) of line and IC3401 as peripheral specified? parts of J3401. Yes Is the output at pin (43) of IC3401 as specified? Yes No Check IC3401 and its peripheral parts. Are the outputs at pins (43) and (45) of IC3401 as specified? Yes No Check J3401 and its peripheral parts. Is the input No Check at pin (40) IC801 and of IC801 as specified? its input line and peripheral parts. Are the inputs at pins (31) and (40) of IC801 as specified? No Check IC801 and its input line and peripheral parts. Are the inputs at pins (1), (5) and (25) of IC3403 as specified? No Check the lines and peripheral parts of J3401, J3405. Yes Are the No Check outputs at IC3403 and pins (11), its (14) and (17) peripheral of IC3403 as parts. specified? Yes Check the input line and its peripheral parts. No Are the inputs at pins (5), (13) and (20) of IC8701 as specified? Yes Check IC8701 and its peripheral parts. No Is the output of IC8701 as specified? Yes Check IC801 and its No Is the input of IC801 as peripheral parts. specified? Yes Check the output of IC801, the input and their peripheral parts. 29 LC-13B8U-S LC-15B8U-S LC-15B9U-SM

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
29
LC-13B8U-S
LC-15B8U-S
LC-15B9U-SM
TROUBLE SHOOTING TABLE
(Continued)
No pictures come out .
All pictures do not come out.
No TV pictures come out.
No Input 2 pictures come out.
No Input 3 pictures come out.
Check if the adjustment process menu of the microcomputer is set properly.
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No S video pictures come out.
No
No
Yes
Yes
Yes
Yes
Does the
test pattern
of the LCD
controller
come out?
Are the
input and
output of
IC801 as
specified?
No TV, Input 2 or Input 3
pictures come out.
Check
IC801 and
its
peripheral
circuitry.
Is the input
at pin (40)
of IC801
as
specified?
Check the
IC801 VIDEO
line and its
peripheral
parts.
Is the output
at pin (19) of
the tuner as
specified?
Are the
input and
output of
IC3401 as
specified?
Check
IC3401 and
its peripheral
parts.
Check the
power supply
line.
Check the
line in
question.
Check
IC3401 and
its peripheral
parts.
Check the
tuner and its
peripheral
parts.
Check the line
in question.
Check
IC3401 and
its peripheral
parts.
Are the
voltages at
pins (6), (7)
and (9) of the
tuner as
specified?
Is the input
at pin (47)
of IC3401
as
specified?
Is the
output at
pin (43) of
IC3401 as
specified?
Check the
line in
question.
Is the
output at
pin (43) of
IC3401 as
specified?
Is the input
at pin (1) of
IC3401 as
specified?
Check the
line in
question.
Check
IC3401 and
its peripheral
parts.
Is the input
at pin (8) of
IC3401 as
specified?
Is the
output at
pin (43) of
IC3401 as
specified?
No
No
Yes
Yes
Yes
Is the input
at pin (40)
of IC801 as
specified?
Is the input
at pin (40)
of IC801 as
specified?
Check
IC801 and
its input
line and
peripheral
parts.
Check
IC801 and
its input
line and
peripheral
parts.
Check
IC801 and
its input
line and
peripheral
parts.
Are the
inputs at pins
(3) and (5) of
IC3401 as
specified?
Check the
SY line, SC
line and
peripheral
parts of
J3401.
Check
J3401 and
its
peripheral
parts.
Are the
outputs at
pins (43)
and (45) of
IC3401 as
specified?
No
Are the
inputs at
pins (31)
and (40) of
IC801 as
specified?
No Input 1 pictures come out.
No
No
Yes
Yes
Check the
lines and
peripheral
parts of
J3401, J3405.
Are the
inputs at
pins (1), (5)
and (25) of
IC3403 as
specified?
Check
IC3403 and
its
peripheral
parts.
Are the
outputs at
pins (11),
(14) and (17)
of IC3403 as
specified?
No
Yes
No
Yes
Check the input line
and its peripheral
parts.
Check IC8701 and
its peripheral parts.
Check IC801 and its
peripheral parts.
No
Yes
Is the output of IC8701
as specified?
Are the inputs at pins (5),
(13) and (20) of IC8701 as
specified?
Is the input of IC801 as
specified?
Check the output of IC801,
the input and their
peripheral parts.