Sharp LC-150M2E (serv.man2) Service Manual ▷ View online
21
LC-121M2E
LC-150M2E
LC-150M2E
LC-121M2E
LC-150M2E
LC-150M2E
Terminal No.
Voltage
I/O
Signal name
Function
51
3.3V
O
HDCK
SOURCE driver control signal output 1
52
3.3V
O
OCK
SOURCE driver control signal output 2
53
3.3V
GND
54
3.3V
O
OOG1
G output 1
55
3.3V
O
OOG0
G output 0 (LSB)
56
3.3V
O
OOB7
B output 7 (MSB)
57
3.3V
O
OOB6
B output 6
58
3.3V
O
OOB5
B output 5
59
3.3V
O
OOB4
B output 4
60
3.3V
GND
61
3.3V
O
OOB3
B output 3
62
3.3V
O
OOB2
B output 2
63
3.3V
O
OOB1
B output 1
64
3.3V
O
OOB0
B output 0 (LSB)
65
3.3V
GND
66
3.3V
O
SPLS
SOURCE driver control signal output 3
67
3.3V
O
SPRS
SOURCE driver control signal output 4
68
3.3V
O
LBR
SOURCE driver control signal output 5
69
3.3V
O
HGO
SOURCE driver control signal output 6
70
3.3V
I
NBH
CCW/CW inversion input
H:Inversion, L:Normal rotation
H:Inversion, L:Normal rotation
71
3.3V
I
NTSC
NTSC/PAL selection input H:PAL, L:NTSC
72
3.3V
GND
73
3.3V
O
TM0
Gate driver control signal output 3
74
3.3V
O
TM1
Test output 1
75
3.3V
O
TM2
Test output 2
76
3.3V
VCC
77
3.3V
GND
78
3.3V
I
R0
R input 0 (LSB)
79
3.3V
I
R1
R input 1
80
3.3V
I
R2
R input 2
81
3.3V
I
R3
R input 3
82
3.3V
I
R4
R input 4
83
3.3V
I
R5
R input 5
84
3.3V
I
R6
R input 6
85
3.3V
I
R7
R input 7 (MSB)
86
3.3V
GND
87
3.3V
I
G0
G input 0 (LSB)
88
3.3V
I
G1
G input 1
89
3.3V
I
G2
G input 2
90
3.3V
I
G3
G input 3
91
3.3V
I
G4
G input 4
92
3.3V
I
G5
G input 5
93
3.3V
I
G6
G input 6
94
3.3V
I
G7
G input 7 (MSB)
95
3.3V
O
TM3
Test output 3
96
3.3V
O
TM4
Test output 4
97
3.3V
GND
98
3.3V
I
TST8
Test input 8
99
3.3V
I
TST7
Test input 7
100
3.3V
I
TST6
Test input 6
22
LC-121M2E
LC-150M2E
LC-150M2E
LC-121M2E
LC-150M2E
LC-150M2E
Terminal No.
Voltage
I/O
Signal name
Function
101
3.3V
I
TST5
Test input 5
102
3.3V
I
TST4
Test input 4
103
3.3V
I
TST3
Test input 3
104
3.3V
I
TST2
Test input 2
105
3.3V
I
TST1
Test output 1
106
3.3V
I
TSH
VCI horisontal sync signal input
107
3.3V
GND
108
3.3V
O
ADCK
A/D converter clock output
109
3.3V
I
TST9
GND
110
3.3V
I
PMODE
Sync signal
Positive polarity/Negative polarity selection input
H:Positive polarity L:Negative polarity
Positive polarity/Negative polarity selection input
H:Positive polarity L:Negative polarity
111
3.3V
I
DINV
Input signal
Primary colors/complementary colors selection input
H:Complementary colors input,
L:Primary colors input
Primary colors/complementary colors selection input
H:Complementary colors input,
L:Primary colors input
112
3.3V
VCC
113
3.3V
GND
114
3.3V
I
B0
B input 0 (LSB)
115
3.3V
I
B1
B input 1
116
3.3V
I
B2
B input 2
117
3.3V
I
B3
B input 3
118
3.3V
I
B4
B input 4
119
3.3V
I
B5
B input 5
120
3.3V
I
B6
B input 6
121
3.3V
I
B7
B input 7 (MSB)
122
3.3V
GND
123
3.3V
O
OCVD
Virtical synchro signal output
124
3.3V
I
TSV
Virtical synchro signal input
125
3.3V
O
MASK
126
3.3V
O
OSCO2
Clock output (No use)
127
3.3V
I
OSCI2
Clock input (No use)
128
3.3V
GND
23
LC-121M2E
LC-150M2E
LC-150M2E
LC-121M2E
LC-150M2E
LC-150M2E
7. TROUBLE SHOOTING
No picture, No sound
Do F701 and F703 function?
Check T701's secondary load.
Check IC702, Q702, L701
and their peripheral parts.
and their peripheral parts.
Remove F701 and F703, and
check the load side.
Is there short-circuiting?
check the load side.
Is there short-circuiting?
Is there short-circuiting of T701
primary side periphery, Q701
and S701?
primary side periphery, Q701
and S701?
Replace F701 and F703.
YES
NO
YES
YES
YES
NO
NO
Check Q751, Q752, Q753,
Q754, T751, T752 and their
peripheral parts.
Q754, T751, T752 and their
peripheral parts.
Check Q703 and its peripheral
parts.
parts.
Replace the fluorecent lamp
with new one and check again.
with new one and check again.
Is primary oscillator waveform
of T751 and T752 normal ?
of T751 and T752 normal ?
Does Q703 function?
Does output voltage +9V
appear?
Does output voltage +9V
appear?
Does F702 function?
Fluorecent lamp failure to light up.
YES
YES
YES
NO
NO
NO
Are T701's secondary outputs,
+30V, +23V, +9V, +5.1V and
-5.5V normal?
+30V, +23V, +9V, +5.1V and
-5.5V normal?
Is T701's primary oscillator
waveform normal?
waveform normal?
Check IC406, IC403 and their peripheral parts.
No picture (AV1, AV2 and Component)
Is output voltages
at pins 3,5 and 6 of
IC406 normal?
at pins 3,5 and 6 of
IC406 normal?
Is input voltages at
pins 51,52 and 53
of IC801 normal?
pins 51,52 and 53
of IC801 normal?
Is output voltages at
pins 41,42 and 43
of IC801 normal?
pins 41,42 and 43
of IC801 normal?
Is output voltages
at pins 1,7 and 8 of
IC803 normal?
at pins 1,7 and 8 of
IC803 normal?
No picture (AV1, AV2)
Replace LCD module with new one and check again.
Replace cables with new one and check again.
No picture
Check the in/output
of IC406 and its
peripheral parts.
of IC406 and its
peripheral parts.
No picture (AV1/AV2)
No picture (Component)
Is signal input into the pin
13 of IC2001?
13 of IC2001?
Check IC406 and
its peripheral parts.
its peripheral parts.
Check IC801 and
its peripheral parts.
its peripheral parts.
Check IC803 and
its peripheral parts.
its peripheral parts.
Is in/output voltages of IC1001 normal?
Is in/output voltages of IC1201 normal?
Are voltages and waveform of the LCD module connecting connector normal?
Aren't cables break down?
Is in/output voltages
of IC401 normal?
of IC401 normal?
Check IC401 and
its peripheral parts.
its peripheral parts.
Is output voltage at pin 18 of IC801 normal?
Is input voltages at pins 33 and 15 of
IC801 normal?
IC801 normal?
Check IC401 and
its peripheral parts.
its peripheral parts.
Is output voltages
at pins 23 and 25
of IC851 normal?
at pins 23 and 25
of IC851 normal?
Check IC851,
Q852, Q854, Q857
and their peripheral
parts.
Q852, Q854, Q857
and their peripheral
parts.
Check IC403,
IC405 and their
peripheral parts.
IC405 and their
peripheral parts.
Check IC801 and
its peripheral parts.
its peripheral parts.
Are output voltages
at pin 7 of IC403 and
it of IC405 normal?
at pin 7 of IC403 and
it of IC405 normal?
Check Q801, Q802
and their peripheral
parts.
and their peripheral
parts.
Is input voltages
at pins 13 and 15
of IC801 normal?
at pins 13 and 15
of IC801 normal?
Is output voltages
at pins 4,5 and 6
of IC801 normal?
at pins 4,5 and 6
of IC801 normal?
Check in/output voltages of IC406
and its peripheral parts.
and its peripheral parts.
NO
No picture apears (AV1)
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Check Q401~Q406 and
their peripheral parts.
their peripheral parts.
Check peripheral
parts.
parts.
YES
YES
NO
NO
YES
YES
YES
YES
YES
24
LC-121M2E
LC-150M2E
LC-150M2E
LC-121M2E
LC-150M2E
LC-150M2E
No sound
Check speaker
unit and its
peripheral parts.
unit and its
peripheral parts.
Check IC305 and
its peripheral
parts.
its peripheral
parts.
Check IC704,
Q704, Q706 and
their peripheral
parts.
Q704, Q706 and
their peripheral
parts.
Check IC310,
IC311 and their
peripheral parts.
IC311 and their
peripheral parts.
Are output at pin
7 of IC310 and it
of IC311 normal?
7 of IC310 and it
of IC311 normal?
Check speaker
unit and its
peripheral parts.
unit and its
peripheral parts.
Check IC312 and
its peripheral
parts.
its peripheral
parts.
Is output at pins
3 and 5 of IC308
normal?
3 and 5 of IC308
normal?
Is output at pins
10 and 17 of
IC305 normal?
10 and 17 of
IC305 normal?
Check IC305
and its peripheral
parts.
and its peripheral
parts.
Check IC308
and its peripheral
parts.
and its peripheral
parts.
Is the pin 18 of
IC2001 in Low
state?
IC2001 in Low
state?
Is output at pins
7 and 18 of
IC312 normal?
7 and 18 of
IC312 normal?
Is output at pins
10,14 and 17 of
IC305 normal?
10,14 and 17 of
IC305 normal?
Is 13V input at
pin 9 of IC305
as specified?
pin 9 of IC305
as specified?
Is the pin 9 of
IC2001 in Low
state?
IC2001 in Low
state?
Muting is applied.
Check the
FSMUT line.
Check the
FSMUT line.
YES
YES
YES
YES
YES
YES
YES
YES
Check IC302,
Q301, Q302
and their
peripheral parts.
Q301, Q302
and their
peripheral parts.
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
Check IC305
and its
peripherals.
and its
peripherals.
Check Q306,
Q307, IC304 and
their peripherals.
Q307, IC304 and
their peripherals.
NO
NO
YES
Muting is applied.
Check the
LMUTE line.
Check the
LMUTE line.
No sound (Front
and rear speaker)
and rear speaker)
No sound
(AV1 output)
(AV1 output)
No sound
(Front speaker)
(Front speaker)
Check speaker
and its
peripherals.
and its
peripherals.
Are Q306, Q307
and IC304
normal?
and IC304
normal?
Is output at pin
14 of IC305
normal?
14 of IC305
normal?
Is the pin 10 of
IC2001 in Low
state?
IC2001 in Low
state?
YES
YES
YES
YES
No sound
(Rear speaker)
(Rear speaker)
Check in/output voltages of IC406.
YES
No colour appears
No colour (AV1, AV2 and Component)
Is output voltages
at pins 3 and 6 of
IC406 normal?
at pins 3 and 6 of
IC406 normal?
Check peripherals.
Are these voltages
as follows of IC801
normal?
pins 51 and 52
(input)
pins 41, 42 and
43 (output)
as follows of IC801
normal?
pins 51 and 52
(input)
pins 41, 42 and
43 (output)
Check IC801 and
its peripheral
parts.
its peripheral
parts.
No colour (AV1, AV2)
Is output voltages
at pin 7 of IC405
normal?
at pin 7 of IC405
normal?
Is input voltages
at pin 13 of
IC801 normal?
at pin 13 of
IC801 normal?
Is output voltages
at pins 5 and 6 of
IC801 normal?
at pins 5 and 6 of
IC801 normal?
Check in/output
voltages of IC406.
voltages of IC406.
Check IC405 and
its peripheral
parts.
its peripheral
parts.
Check peripherals.
No colour (Component)
YES
YES
YES
NO
NO
NO
NO
NO
Check IC801 and
its peripheral
parts.
its peripheral
parts.
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