Sharp LL-193 (serv.man2) Service Manual ▷ View online
LL-193A/LL-193G
TROUBLESHOOTING
5 – 2
Set volume to max and has the output
waveform appeared in 14, 17 of Audio
PWB U201 pin?
waveform appeared in 14, 17 of Audio
PWB U201 pin?
Is connection of from a main PWB cable
to key PWB and a speaker cable normal?
to key PWB and a speaker cable normal?
No
Speaker defective.
Yes
No
No
No
Yes
Yes
■ NO SOUND
■ Screen does not operate normally.
A
Screen does not operate normally.
Check RGB cable.
Defective
Replace RGB cable with
a new one.
a new one.
Check screen condition by changing display modes.
Operate the "ALL RESET" to check if screen condition changes.
(Press and hold MENU and SELECT buttons while turning on power switch.)
(Press and hold MENU and SELECT buttons while turning on power switch.)
Screen stays in black.
Screen stays in white.
Screen jitters or on-screen
characters flicker.
characters flicker.
Abnormal color
Check the following signals
1) Check if module control signal is output (U201).
2) Check if VLCD voltage is output normally.
Yes
No
Yes
No
Yes
No
CLOCK and PHASE
can be adjusted?
can be adjusted?
Does abnormal area move on
screen when BLACK LEVEL or
CONT is changed after H-POS
or V-POS is set?
screen when BLACK LEVEL or
CONT is changed after H-POS
or V-POS is set?
Switch PWB defective
Main PWB defective.
LCD panel defective.
No sound
Audio cable defective.
Yes
No
Yes
Normal
Defective
Power supply inverter
PWB defective.
PWB defective.
Check 11, 12pin of Audio
PWB U201 signal
PWB U201 signal
U201 of Main PWB defect and so
Main PWB defective.
Main PWB defective.
Is the signal outputted normally
from the source of an Audio signal?
from the source of an Audio signal?
Has the input waveform
appeared in 4, 9 pin of Audio
PWB U201 ?
appeared in 4, 9 pin of Audio
PWB U201 ?
Audio PWB U201 defect and
so Audio PWB defective.
so Audio PWB defective.
Is the 15, 16 pin of Audio PWB U201
about 12V?
about 12V?
If the speaker fuse (F302 or F303 on the
main PWB) is blown off, replace the
whole main PWB
main PWB) is blown off, replace the
whole main PWB
LL-193A/LL-193G
HARDWARE DESCRIPTIONS
6 – 1
CHAPTER 6. HARDWARE DESCRIPTIONS
1. MAIN PWB UNIT
1-1. SCALER U201
(MODEL A: GM2321, MODEL G: GM5321)
The gm2321 incorporated in Model A is an all-in-one LCD display con-
troller which supports analog image inputs up to SKGA (1280 x 1024),
troller which supports analog image inputs up to SKGA (1280 x 1024),
and is composed of the micro-controller (x86 compatible), the OSD con-
troller, and the dual LVDS transmitter.
The program for executing with the micro-controller can be selected
from the built-in standard program and the custom program of an exter-
nally-installed Flash memory.
The externally-installed Flash memory space is 256Kbyte x 8bit. The
code in the externally-installed Flash memory can be revised through
serial communication from outside of the system by use of the ISP (In
serial communication from outside of the system by use of the ISP (In
System Programming) function.
There are 24 general-purpose I/O ports (GPIO) which can be controlled
by the micro-controller.
by the micro-controller.
The gm5321 incorporated in Model G is additionally provided with the
digital image input function. (It is not provided in the gm2321)
digital image input function. (It is not provided in the gm2321)
1-2. FLASH MEMORY U203 (PM25LV010)
This memory is a serial Flash memory of the SPI (Serial Peripheral
Interface) system. The memory is 128K x 8 bit (1Mbit), and only the
Interface) system. The memory is 128K x 8 bit (1Mbit), and only the
lower 256Kbyte is used for this model.
1-3. SERIAL EEPROM U102 (24LC02)
U101 (INSTALLED ONLY IN MODEL G, 24LC02)
This is a serial EEPROM (256 word x 8 bit) supporting the I2C bus. It is
for the DCD of analog and digital inputs, supporting the DDC2B.
for the DCD of analog and digital inputs, supporting the DDC2B.
1-4. SERIAL EEPROM U205 (24LC16)
This is a serial EEPROM (2K word x 8 bit) supporting the I2C bus. It is
controlled by the micro-controller provided in the scaler U201. It stores
controlled by the micro-controller provided in the scaler U201. It stores
the OSD setting data, etc.
1-5. POWER CIRCUIT
This DC-DC power circuit on the main PWB generates 3.3V and 1.8V
for the scaler from DC5V of the power/inverter PWB unit.
2. AUDIO PWB UNIT
2-1. AUDIO AMPLIFIER U201 (TDA7496L)
The TDA7496L is a stereo power amplifier of 2W + 2W. It is driven by
the power voltage of 12V, and drives two speakers (L and R channels)
the power voltage of 12V, and drives two speakers (L and R channels)
of 8ɹ. The max. speaker output is 1W + 1W with the distortion rate of
10% or less. The output is also connected to the headphone terminal.
When the headphone plug is inserted, the speaker is shut off and an
When the headphone plug is inserted, the speaker is shut off and an
output is provided from the headphone. It is also provided with the vol-
ume adjustment function, the mute function, and the standby function.
3. POWER SOURCE, INVERTER PWB UNIT
(PWPC1742HDP2)
3-1. POWER SOURCE SECTION
This power source can be used with AC90 Å` 264V (50/60Hz). The out-
put is provided in two systems; DC5V (max. 1.2A) and 12V (max. 2.6A).
DC12V can be also used in the inverter section in the same unit.
DC12V can be also used in the inverter section in the same unit.
The overvoltage circuit, the overcurrent circuit, and the temperature-
protection circuit are provided. In addition, two fuses are provided on
the primary side.
3-2. INVERTER SECTION
This is a four-lamp backlight (fluorescent lamps) lighting circuit which
adjusts the brightness of the LCD panel. It is driven by DC12V gener-
ated in the power section in the same unit. When a trouble occurs in the
ated in the power section in the same unit. When a trouble occurs in the
lamp, the inverter unit operation may be interrupted by the protection
circuit.
The inverter unit supplies a high voltage of about 1,000V to the lamps
The inverter unit supplies a high voltage of about 1,000V to the lamps
with the booster transformer.
When repairing, use a great care not to put your hands near the output
connector during conduction. It may cause a serious danger.
connector during conduction. It may cause a serious danger.
LL-193A/193G
CIRCUIT DIAGRAM
7 – 1
Pins 6/7/8 are R/G/B
return lines resp.
75-ohm terminating resistor
very close to the VGA
conn.
12
3
(10 mi
l,
)
(8 m
il)
S
G
D
G
D
S
VCC
DDC_SCL_A
DDC_SDA_A
HS_in
VS_IN
Rin
Gin
Bin
DDC_SDA_VGA
DDC_SCL_VGA
GPIO5/UART_DO
GPIO4/UART_DI
SDA_IN
HOT_PLUG
RX2-IN
RX0-IN
SCL_IN
SCL_IN
RX2+IN
RX1-IN
SDA_IN
RXC+IN
RX0+IN
RX1+IN
RXC-IN
BLUE+
BLUE-
RED+
RED-
GREEN-
GREEN+
GPIO5/UART_DO
GPIO4/UART_DI
DDC_SCL_VGA
DDC_SDA_VGA
SOG_MCSS
HS
VS
UARTSET
RX1-
RX0+
RX1+
RX0-
DDC_SCL_DVI
RXC+
RX2-
DVI_EDID_WP
RX2+
DDC_SDA_DVI
RXC-
VGA_5V
GND
+5V
GND
GND
GND
AGND
GND
GND
GND
GND
+3.3V
GND
GND
AGND
GND
GND
GND
GND
GND
GND
GND
GND
DVI_5V
DVI_5V
+5V
+5V
GND
GND
+5V
+5V
VGA_5V
GND
R102
N
C
C113
0.1uF
R138
0
O
1
/1
6
W
CN102
DB15
1
6
2
7
3
8
4
9
5
11
12
13
14
15
10
R103
N
C
C108
0.1uF
R113
47O 1/16W
U101
NC
4
8
1
2
3
7
6
5
GND
VCC
A0
A1
A2
WP
SCL
SDA
D109
NC
3
1
2
D104
BAV99
3
1
2
C117
NC
C105
0.047uF
Q102
2N7002E
FB103
bead 80
C112
NC
ZD107
MLL5232B 5.6V
R101
N
C
R115
62O 1/16W
CN101
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
17
18
19
20
21
23
24
C1
16
22
C2
C3
C4
C5
25
26
T2-
T2+
SGND
T4-
T4+
DDCCLK
DDCDAT
A_VSYNC
T1-
T1+
SGND
T3-
T3+
+5V
GND
T0-
T0+
SGND
T5-
T5+
TC+
TC-
A_RED
HPD
SGND
A_GREEN
A_BLUE
A_HSYNC
A_GND
A_GND
A_GND
R107
62O 1/16W
ZD105
MLL5232B 5.6V
R112
4.7KO 1/16W
R136
4.7KO 1/16W
ZD101
NC
R114
22O 1/16W
R132
NC
D113
NC
3
1
2
U104B
74LVC14ADT
3
4
D101
NC
3
1
2
R142
0O 1/16W
C123
0.1uF
D110
NC
3
1
2
R135
10KO 1/16W
R118
75O 1/16W
U104A
74LVC14ADT
1
2
C118
NC
FB104
bead 80
ZD104
MLL5232B 5.6V
R105
NC
R143
0O 1/16W
U102
M24C02WMN6
4
8
1
2
3
7
6
5
GND
VCC
A0
A1
A2
WP
SCL
SDA
R127
2.2KO 1/16W
R120
75O 1/16W
R141
NC
Q103
PMBS3904
3
2
1
FB101
120 OHM
R110
NC
R126
22O 1/16W
R109
62O 1/16W
C104
0.047uF
C115
NC
ZD102
NC
R134
10KO 1/16W
FB102
bead 80
C114
NC
C121
NC
ZD109
MLL5232B 5.6V
C120
NC
R140
NC
C106
0.047uF
R125
22O 1/16W
R137
10KO 1/16W
C122
0.1uF
R104
NC
D108
NC
3
1
2
ZD103
NC
R119
75O 1/16W
U104E
74LVC14ADT
11
10
D102
BAV99
3
1
2
R116
N
C
U104F
74LVC14ADT
13
12
D112
NC
3
1
2
D111
NC
3
1
2
R131
NC
R108
22O 1/16W
R117
47O 1/16W
R111
4.7KO 1/16W
D106
NC
3
1
2
C109
0.047uF
C103
0.047uF
Q101
2N7002E
D105
BAV70
3
1
2
C116
NC
R139
0
O
1
/1
6
W
C101
NC
C111
NC
R106
22O 1/16W
ZD110
MLL5232B 5.6V
D107
NC
3
1
2
R133
NC
R128
2.2KO 1/16W
C110
0.047uF
ZD106
MLL5232B 5.6V
C119
NC
C124
0.1uF
D103
BAV99
3
1
2
C107
0.047uF
ᜆᐔⴕ✢
ANALOG&DIGIT
AL INPUT
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
1/4
CH
APTER 7. CIRCUIT DIAGRAM
■
LL-
19
3A
LL-193A/193G
CIRCUIT DIAGRAM
7 – 2
Close to respective power Pins
RS232
3
2
1
R249 Serial
ROM >>0
Parallel
ROM>>NC
R251 Dual
>>
20
K
A
n
al
o
g
-o
n
l
y>>NC
RMADDR15
ROM_SDI
RMADDR17
ROM_SCSn
ROM_SCLK
RMADDR16
ROM_HOLD#
ROMCE#
ROM_SDO
ROM_WP#
DDC_SCL_VGA
DDC_SDA_VGA
GPIO5/UART_DO
LV_E5
LV_E2
LV_O3
LV_O2
LV_O8
LV_O6
GPIO8/IRQout
GPIO4/UART_DI
GPIO8/IRQout
GPIO7/IRQin
RMADDR16
LV_E1
LV_O1
LV_O5
RMADDR13
GPIO5/UART_DO
GPIO4/UART_DI
XTAL
LV_E9
LV_E0
LV_O0
SCL
TCLK
RMADDR15
GPIO7/IRQin
LV_E7
LV_E6
LV_O4
RMADDR12
LV_E8
LV_E4
LV_O7
SDA
SDA
ROMCE#
LV_E3
RMADDR17
LV_O9
SCL
WP
WP
RED+
RED-
GREEN+
GREEN-
BLUE+
BLUE-
PBIAS
RX0+
RX2-
RX1-
RX2+
RX1+
RXC-
RX0-
RXC+
DDC_SDA_DVI
DDC_SCL_DVI
PWM0
GPIO4/UART_DI
GPIO5/UART_DO
HS
VS
PPWR
DDC_SCL_VGA
DDC_SDA_VGA
GPIO5/UART_DO
GPIO4/UART_DI
SOG_MCSS
LV_E[0..9]
LV_O[0..9]
VOLUME
AUDIO_SD
DDC_SDA_VGA
DDC_SCL_VGA
MENU
LED_RED
LED_GRN
SELECT
LEFT
RIGHT
UARTSET
FEATURE
POWER
DVI_EDID_WP
PWM1
+3.3V
+5V
GND
+1.8V
+3.3V
GND
GND
+1.8V
+1.8V
GND
+3.3V
GND
1.8V_DVI
GND
GND
+3.3V
+3.3V_RGB
+3.3V
GND
GND
GND
GND
+3.3V
1.8V_CVDD
1.8V_CVDD
1.8V_AVDD
1.8V_AVDD
+1.8V
GND
1.8V_PLL
+3.3V
GND
3.3V_LVDS
3.3V_LVDS
+5V
AGND
GND
+3.3V_RGB
+3.3V
GND
GND
AGND
+5V
+3.3V
GND
GND
+3.3V
1.8V_DVI
GND
GND
GND
GND
GND
1.8V_PLL
+5V
GND
+5V
R207
0
O
1/16W
R246
NC
R201
4.7KO 1/16W
R244
100O 1/16W
FB203
120 OHM
C202
0.1uF
+
C221
10uF/50V
R215
20KO 1/16W
C214
0.1uF
C212
0.1uF
C207
0.1uF
R256
47O 1/16W
+
C236
10uF/50V
C216
0.1uF
FB206
120 OHM
C239
0.1uF
R260
150O 1/16W 1%
C230
0.1uF
R235
10KO 1/16W
R209
0
O
1/16W
U203
PM25LV010
1
2
3
4
5
6
7
8
CE#
SO
WP#
VSS
S
I
SCK
HOLD#
VDD
C240
0.1uF
C218
0.1uF
C205
0.1uF
FB207
120 OHM
C226
0.1uF
R250
N
C
C225
0.1uF
3.3V_A
AGND
U201
GM2321
PQFP-208
151
152
147
148
142
143
119
118
124
123
129
128
169
170
98
99
100
101
35
36
133
132
114
71
72
77
78
79
80
178
92
93
69
202
201
200
199
198
197
196
195
194
185
4
3
2
1
208
207
204
203
186
187
193
189
192
188
5
154
150
149
153
144
122
117
23
50
73
190
205
166
9
41
75
96
116
67
68
12
121
25
126
28
115
171
26
172
24
137
11
164
181
182
8
42
51
74
76
94
97
140
180
163
165
136
155
48
47
87
86
66
65
33
34
62
59
61
60
58
57
63
64
46
45
44
43
38
37
55
56
32
31
30
29
22
21
49
54
18
17
16
15
14
13
19
20
167
70
135
27
40
113
120
125
130
134
141
145
7
6
95
184
183
191
206
139
179
177
39
168
156
131
127
146
81
82
83
84
85
88
89
90
91
138
10
102
103
106
107
108
109
110
111
112
52
53
104
105
157
158
159
160
161
162
173
174
175
176
RED+
RED-
GREEN+
GREEN-
BLUE+
BLUE-
RX2-
RX2+
RX1-
RX1+
RX0-
RX0+
XTAL
TCLK
GPIO11/PWM0
GPIO12/PWM1
GPIO13/PWM2
GPIO14/PWM3
CH1P_LV_O
CH1N_LV_O
RXC-
RXC+
REXT
HOST_SCL/UART_DI
HOST_SDA/UART_DO
DDC_SCL_VGA
DDC_SDA_VGA
DDC_SCL_DVI
DDC_SDA_DVI
RESETn
GPIO9/NVRAM_SCL
GPIO10/NVRAM_SDA
GPIO15
ROM_ADDR0
ROM_ADDR1
ROM_ADDR2
ROM_ADDR3
ROM_ADDR4
ROM_ADDR5
ROM_ADDR6
ROM_ADDR7
ROM_ADDR8
ROM_ADDR15
ROM_DATA0
ROM_DATA1
ROM_DATA2
ROM_DATA3
ROM_DATA4
ROM_DATA5
ROM_DATA6
ROM_DATA7
ROM_ADDR14
ROM_ADDR13
ROM_ADDR9
ROM_ADDR11
ROM_ADDR10
ROM_ADDR12
ROM_OEn
AVDD_ADC_3.3
AVDD_RED_3.3
AGND_GREEN
AGND_RED
AGND_BLUE
AGND_RX1
AGND_RX2
AVSS_LV_E
RVDD_3.3
RVDD_3.3
RVDD_3.3
RVDD_3.3
VDD_RPLL_1.8
CVDD_1.8
CVDD_1.8
CVDD_1.8
CVDD_1.8
VDD_RX2_1.8
PPWR
PBIAS
AVSS_LV_E
VDD_RX1_1.8
AVSS_LV
VDD_RX0_1.8
AVSS_LV_O
AGND_IMB
AVDD_RPLL_3.3
AVDD_LV_3.3
LBADC_VDD_3.3
AVDD_LV_E_3.3
VDD_RXPLL_1.8
AVDD_LV_E_3.3
VDD_ADC_1.8
HSYNC/CSYNC
VSYNC
CRVSS
CRVSS
CRVSS
CRVSS
CRVSS
CRVSS
CRVSS
CRVSS
CRVSS
GND_ADC
GND_RPLL
GND_RXPLL
RESERVED
RESERVED
RESERVED
CRVSS
CVDD_1.8
JTAG_TDI
RESERVED
CH2P_LV_O
CH2N_LV_O
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
JTAG_TDO
RESERVED
RESERVED
RESERVED
RESERVED
CH0N_LV_O
CH0P_LV_O
RESERVED
JTAG_RESET
CLKN_LV_O
CLKP_LV_O
CH3N_LV_O
CH3P_LV_O
CH0N_LV_E
CH0P_LV_E
RESERVED
NC
CH2N_LV_E
CH2P_LV_E
CLKN_LV_E
CLKP_LV_E
CH3N_LV_E
CH3P_LV_E
CH1P_LV_E
CH1N_LV_E
RESERVED
RESERVED
RESERVED
AVDD_LV_O_3.3
AVDD_LV_O_3.3
AVDD_IMB_3.3
AVDD_RX2_3.3
AVDD_RX1_3.3
AVDD_RX0_3.3
AVDD_RXC_3.3
AVDD_BLUE_3.3
AVDD_GREEN_3.3
ROM_CSn
ROM_WEn
RVDD_3.3
ROM_ADDR16
ROM_ADDR17
CRVSS
CRVSS
CVDD_1.8
CVDD_1.8
LBADC_GND
AVSS_LV_O
AGND_RPLL
AGND_ADC
AGND_RXC
AGND_RX0
SOG_MCSS
GPIO0
GPIO1
GPIO2
GPIO3
GPIO4
GPIO5
GPIO6
GPIO7
GPIO8
CLKOUT
RESERVED
GPIO16
GPIO17
GPIO18
GPIO19
GPIO20
GPIO21
GPIO22
GPIO23
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
LBADC_IN1
LBADC_IN2
LBADC_IN3
LBADC_RETURN
C222
0.1uF
R233
10KO 1/16W
C235
0.1uF
+
C231
10uF/50V
FB202
120 OHM
U202
ASM809SEURF-T
3
2
1
VCC
RSTN
GND
C241
0.1uF
+
C220
10uF/50V
R251
20KO 1/16W
C219
0.1uF
C206
0.1uF
+
C232
10uF/50V
C242
0.1uF
R210
0
O
1/16W
C223
0.1uF
R205
100O 1/16W 1%
C213
0.1uF
+
C201
10uF/50V
R241
0O 1/16W
C229
0.1uF
FB209
120 OHM
R262
N
C
C204
0.1uF
R252
47KO 1/16W
R247
NC
C224
0.1uF
R240
NC
R245
10KO 1/16W
R255
47O 1/16W
C245
33pF
FB205
120 OHM
R248
NC
U205
M24C16-MN6T
1
2
3
4
5
6
7
8
A0
A1
A2
VSS
SI
SCK
WP
VCC
C244
33pF
CN201
NC
1
2
3
4
R242
10KO 1/16W
+
C209
10uF/50V
C203
0.1uF
R206
0
O
1/16W
R222
20KO 1/16W
C228
0.1uF
X201
14.318MHz
1
2
R258
10KO 1/16W
C251
0.1uF
R239
10KO 1/16W
FB201
120 OHM
C246
0.1uF
C233
0.1uF
R217
N
C
R243
10KO 1/16W
C210
0.1uF
C237
0.1uF
C234
0.1uF
R259
10KO 1/16W
R238
10KO 1/16W
R236
100O 1/16W
C217
0.1uF
C208
0.1uF
R208
0
O
1/16W
C248
1uF/25V
R218
20KO 1/16W
C211
0.1uF
R202
4.7KO 1/16W
R234
10KO 1/16
W
R237
100O 1/16W
R249
0O 1/16W
+
C238
10uF/50V
FB208
120 OHM
C243
0.1uF
+
C215
10uF/50V
R263
0
O
1/16W
C250
1uF/25V
C227
0.1uF
FB204
120 OHM
R204
0
O
1/16W
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
2/4
gm2321
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