Skyworth 42E68 User manual

SERVICE MANUAL
Description:
MODEL.
Engineering Dept:
Artwork By:
Checked By:
Approved By:
Brand Name:
JOB NO.
Date:
Date:
Date:
SERVICE MANUAL 8M48A
2012-02-28
SKYWORTH
SIZE:A5
Design and specifications are subject to change without prior notice.
(Only Referrence)
5M92A CHASSIS

Content--------------------------------------------------------------2
11-41
42
43-44
45-53
54-80
81-84
85-94

LED 8M26A

TOSHIBA CODE
Component
PAL SECAM / BG DK PAL / I
NTSC / M
VHF LOW K1~S6
VHF HIGH S7~S36
VHF S37~DS57
44.25MHz ~ 140.25MHz
147.25MHz ~ 423.25MHz
431.25MHz ~ 863.25MHz
Asia\Europe

40
55
80
For 22” LED
For 24” LED
For 32” LED

(24 inches is 3W)
(24 inches is 4 ohm)

40
40
3
2
1
4.2
50
0.5
80
40
3
12000
(26inches
is
8
ohm)

40
YES
8
6
46
46
NO
NO
Standard
Spanish
Standard
20

4
2
4
0 40 7 0
0 40 7 0
0 40
40 85
-Y0 50
30000

AP1117
1A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
ʳ
ʳ
AP1117Rev.3 2 of 11 SEPTEMBER 2006
www.diodes.com ©Diodes Incorporated
Typical Application Circuit ʳ
C2
22uF
5V
3.3V/1A
Tab is Vout
Vin
Vout
GND
C1
10uF
( 5V/3.3V fixed output ) ʳ
R1
121
R2
121
C2
22uF
5V
2.5V/1A
Tab is Vout
Vin
Vout
Adj
C1
10uF
o
V
( 5V/2.5V ADJ output ) ʳ
)
1
2
REFoR
R
(1VV 
Note:
ȍ
ȍ
ʳ
ʳ
ʳ
3 PIN SOT223 3 PIN TO252 / TO263
3 PIN TO220
(Top View)
3
2
1
Vin
Vout
Adj( GND)
Tab is Vout
Tab is Vout
Vin
Vout
Adj( GND)
(Top View)
3
2
1
3 PIN SOT89
Vin
Vout
Adj( GND)
Tab is Vout
3
2
1
Adj( GND)
Vin
Vout
Tab is Vout
3
2
1
ʳ
Connection Diagramʳ

AP1117
1A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
ʳ
ʳ
AP1117Rev.3 3 of 11 SEPTEMBER 2006
www.diodes.com ©Diodes Incorporated
Block Diagramʳ
NAME I/O PIN # FUNCTION
Adj (GND) I 1 A resistor divider from this pin to the Vout pin and ground sets the output voltage
(Ground only for Fixed-Mode).
Vout O 2
The output of the regulator. A minimum of 10uF capacitor (0.15ȍESR 20ȍ)
must be connected from this pin to ground to insure stability.
Vin I 3
The input pin of regulator. Typically a large storage capacitor (0.15ȍESR 20ȍ)
is connected from this pin to ground to insure that the input voltage does not sag
below the minimum dropout voltage during the load transient response. This pin
must always be 1.3V higher than Vout in order for the device to regulate properly.
Pin Descriptionsʳ
3
Thermal
Shutdown 1
2Vout
Adj
1.25V +
+
CURRENT
LIMIT
Vin
-
+
+
1
GND
(FIXED)
-

AI SEMI ELECTRONICS LTD. 2
LPackage
(SOT-223)
T Package
(TO-220) (TO-252)
Pin Configurations
INPUT
OUTPUT
ADJ/GND
VOUT
INPUT
OUTPUT
ADJ/GND
VOUT
INPUT
OUTPUT
ADJ/GND
VOUT
Figure 2. Pin Configurations of AS1117
1
2
3
1
2
3
1
2
3
UPackage
ADJ/GND
OUTPUT
INPUT
VOUT
S Package
(TO-263)
RPackage
INPUT
OUTPUT
ADJ/GND
(SOT-89)
1
2
3
1
2
3
VOUT
http://www.a1semi.com
AS1117
A1semi 1A Fixed and Adjustable Low
Electronics Ltd Dropout Linear Regulator(LDO)
A1
A1
A1

A1 SEMI ELECTRONICS LTD. 3
Functional Block Diagram
GND (Fixed Output)
ADJ (Adjustable Output)
Thermal
Shutdown
Out
+
-
INPUT
OUTPUT
Figure 3. Functional Block Diagram of AS1117
http://www.a1semi.com
AS1117
A1semi 1A Fixed and Adjustable Low
Electronics Ltd Dropout Linear Regulator(LDO)
A1
A1
A1

Rev. 1.0 June 2011 www.aosmd.com Page 1 of 14
AOZ1051PI
EZBuck™ 3 A Synchronous Buck Regulator
General Description
The AOZ1051PI is a high efficiency, easy to use, 3 A
synchronous buck regulator. The AOZ1051PI works from
4.5 V to 18 V input voltage range, and provides up to 3 A
of continuous output current with an output voltage
adjustable down to 0.8 V.
The AOZ1051PI comes in an exposed pad SO-8
package and is rated over a -40 °C to +85 °C operating
ambient temperature range.
Features
z4.5 V to 18 V operating input voltage range
zSynchronous Buck: 70 minternal high-side switch
and 40 minternal low-side switch (at 12 V)
zUp to 95 % efficiency
zExternal soft start
zOutput voltage adjustable to 0.8 V
z3 A continuous output current
z500 kHz PWM operation
zCycle-by-cycle current limit
zPre-bias start-up
zShort-circuit protection
zThermal shutdown
zExposed pad SO-8 package
Applications
zPoint of load DC/DC converters
zLCD TV
zSet top boxes
zDVD and Blu-ray players/recorders
zCable modems
Typical Application
Figure 1. 3.3 V 3 A Synchronous Buck Regulator, Fs = 500 kHz
LX
VIN
VIN
VOUT
FB
PGND
EN
COMP
AGND
C2, C3
22μF
R1
R2
CC
CSS
RC
C1
10μF
L1 4.7μH
AOZ1051PI
SS

AOZ1051PI
Rev. 1.0 June 2011 www.aosmd.com Page 2 of 14
Ordering Information
AOS Green Products use reduced levels of Halogens, and are also RoHS compliant.
Please visit www.aosmd.com/web/quality/rohs_compliant.jsp for additional information.
Pin Configuration
Pin Description
Part Number Ambient Temperature Range Package Environmental
AOZ1051PI -40 °C to +85 °C EPAD SO-8 Green Product
1
2
3
4
PGND
VIN
A
GND
FB
Exposed Pad SO-8
(Top View)
PAD
(LX)
NC
SS
EN
COMP
8
7
6
5
Pin Number Pin Name Pin Function
1 PGND Power ground. PGND needs to be electrically connected to AGND.
2 VIN Supply voltage input. When VIN rises above the UVLO threshold and EN is logic high,
the device starts up.
3 AGND Analog ground. AGND is the reference point for controller section. AGND needs to be
electrically connected to PGND.
4 FB Feedback input. The FB pin is used to set the output voltage via a resistive voltage divider
between the output and AGND.
5 COMP External loop compensation pin. Connect a RC network between COMP and AGND to
compensate the control loop.
6 EN Enable pin. Pull EN to logic high to enable the device. Pull EN to logic low to disable the
device. If on/off control in not needed, connect EN to VIN and do not leave it open.
7 SS Soft-start pin. 5 μA current charging current.
8 NC No Connect Pin. Pin 8 is not internally connected. Connect this pin externally to LX and
use it for better thermal performance.
Exposed pad LX Switching node. LX is the drain of the internal PFET. LX is used as the thermal pad of the
power stage.

AOZ1051PI
Rev. 1.0 June 2011 www.aosmd.com Page 3 of 14
Block Diagram
Absolute Maximum Ratings
Exceeding the Absolute Maximum Ratings may damage the
device.
Note:
1. Devices are inherently ESD sensitive, handling precautions are
required. Human body model rating: 1.5 kin series with 100 pF.
Recommended Operating Conditions
The device is not guaranteed to operate beyond the Maximum
Recommended Operating Conditions.
Note:
2. The value of 4JA is measured with the device mounted on a 1-in2
FR-4 board with 2 oz. Copper, in a still air environment with
TA= 25 °C. The value in any given application depends on the
user’s specific board design.
500kHz
Oscillator
AGND PGND
VIN
EN
FB
SS
COMP
LX
OTP
Internal
+5V
ILimit
PWM
Control
Logic
5V LDO
Regulator
UVLO
& POR
Softstart
Reference
& Bias
0.8V
SS
5μA
Q1
Q2
PWM
Comp
Level
Shifter
+
FET
Driver
ISen
EAmp
+
–
+
–
+
–
+
Parameter Rating
Supply Voltage (VIN) 20 V
LX to AGND -0.7 V to VIN+0.3 V
LX to AGND (20 ns) -5 V to 22 V
EN to AGND -0.3 V to VIN+0.3 V
FB, SS, COMP to AGND -0.3 V to 6.0 V
PGND to AGND -0.3 V to +0.3 V
Junction Temperature (TJ) +150 °C
Storage Temperature (TS) -65 °C to +150 °C
ESD Rating(1) 2.0 kV
Parameter Rating
Supply Voltage (VIN) 4.5 V to 18 V
Output Voltage Range 0.8 V to 0.85 • VIN
Ambient Temperature (TA) -40 °C to +85 °C
Package Thermal Resistance
Exposed Pad SO-8 (4JA)(2) 50 °C/W

SY8086
High Efficiency 1.4MHz, 1A
Synchronous Step Down Regulator
Preliminary Specification
SY8086 Rev. 0.11 Silergy Corp. Confidential- Prepared for Customer Use Only 1
General Description
The SY8086 is a high-efficiency 1.4MHz synchronous
step-down DC-DC regulator ICs capable of delivering
up to 1A output current. The SY8086 operates over a
wide input voltage range from 2.5V to 5.5V and
integrate main switch and synchronous switch with
very low R
DS(ON)
to minimize the conduction loss.
Low output voltage ripple and small external inductor
and capacitor sizes are achieved with 1.4MHz
switching frequency. This along with small SOT-23
footprint provides small PCB area application.
Ordering Information
Temperature Code
Package Code
Optional Spec Code
SY8086ƶ
ƶƶ
ƶ(ƶƶ
ƶƶƶƶ
ƶƶ)ƶ
ƶƶ
ƶTemperature Code
Package Code
Optional Spec Code
SY8086ƶ
ƶƶ
ƶ(ƶƶ
ƶƶƶƶ
ƶƶ)ƶ
ƶƶ
ƶ
Temperature Range: -40
e C to 85 e C
Features
• Low R
DS(ON)
for internal switches (top/bottom):
250m
Ω /200m Ω
•
2.5-5.5V input voltage range
• 1.4MHz switching frequency minimizes the
external components
• Internal softstart limits the inrush current
• RoHS Compliant and Halogen Free
• Compact package: SOT23 5 pin
Applications
• Portable Navigation Device
• Smart phone
• USB Dongle
• Set Top Box
• Media Player
Typical Applications
LX
IN
GND FB
EN
V
IN
C
IN
L
R
1
R
2
V
OUT
C
OUT
C
1
(opt.)
Figure 1. Schematic Diagram Figure2 Efficiency vs Load Current
Ordering Number Package type Note
SY8086AAC SOT23-5 1A

SY8086
SY8086 Rev. 0.11 Silergy Corp. Confidential- Prepared for Customer Use Only 2
Pinout (top view)
EN
GND
LX IN
FB
1
2
3
5
4
EN
GND
LX IN
FB
1
2
3
5
4
SOT23-5
Top mark: BE xyz (Device code: BE, x=year code, y=week code, z= lot number code)
Pin Name Pin Number Pin Description
EN 1 Enable control. Pull high to turn on. Do not float.
GND 2 Ground pin
LX 3 Inductor pin. Connect this pin to the switching node of inductor
IN 4 Input pin. Decouple this pin to GND pin with at least 1uF ceramic cap
FB 5 Output Feedback Pin. Connect this pin to the center point of the output
resistor divider (as shown in Figure 1) to program the output voltage:
Vout=0.6*(1+R
1
/R
2
)
Absolute Maximum Ratings (Note 1)
Supply Input Voltage --------------------------------------------------------------------------------------------- 6.0V
Enable, FB Voltage------------------------------------------------------------------------------------------------ V
IN + 0.6V
Power Dissipation, P
D @ T A = 25°C SOT-23-5 -------------------------------------------------------------- 0.4W
Package Thermal Resistance (Note 2)
SOT23-5,
θ JA ------------------------------------------------------------------------------------------ 250°C/W
SOT23-5,
θ JC -------------------------------------------------------------------------------------------130°C/W
Junction Temperature Range ------------------------------------------------------------------------------------ 150°C
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------- 260°C
Storage Temperature Range -------------------------------------------------------------------------------------
- 65°C to 150°C
ESD Susceptibility (Note 2)
HBM (Human Body Mode) -------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ----------------------------------------------------------------------------------------------200V
Recommended Operating Conditions (Note 3)
Supply Input Voltage -------------------------------------------------------------------------------------------- 2.5V to 5.5V
Junction Temperature Range ---------------------------------------------------------------------------------- -40°C to 125°C
Ambient Temperature Range ----------------------------------------------------------------------------------
- 40°C to 85°C

IC Block Diagram
-13-
U10(LCDTV CONTROLLER WITH VIDEO ECODE)MST6E181VS
PIN DIAGRAM (MST6E181VS)
MST6E181VS
198
199
217
2 1
216
215
214
213
212
211
210
209
208
207
206
205
204
203
202
201
200
197
196
195
194
193
192
191
190
189
188
187
186
185
184
183
182
181
180
179
178
177
176
175
174
173
172
171
170
169
168
167
166
165
164
163
162 161
160 159 158 157 156 155 154 153 152 151 150 149 148 147 146 145 144 143 142 141 140 139 138 137 136 135 134
133 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 110 109
108
107
106
105
104
103
102
101
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52 51 50 49 48 47 46 45
44 43 42 41 40 39 38 37 36 35 34 33 32 31 30
29
28
27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9 8 7 6 5 4 3
DM_P1
DP_P1
E-pad
CEC IRIN
GPIO9/PM6/CS1
GPIO8/PM5/RX
GPIO7/PM4/POWER_ON
GPIO6/PM1/TX
DDCA_DA
DDCA_CK
GPIO10/PMGPIO
GPIO13/SAR2
GPIO12/SAR1
GPIO11/SAR0
SPI_CZ
SPI_DO
SPI_DI
SPI_CK
GND_EFUSE
DVDD_NODIE
AVDD_NODIE
DP_P0
DM_P0
TESTPIN
DDCR_CK
VDDP_3
DDCR_DA
VDDC
A_DDR1_A4
A_DDR1_A5
A_DDR1_A6
A_DDR1_A7
A_DDR1_A8
AVDDIO_2.5V
A_DDR1_A9
A_DDR1_A11
A_DDR1_A12
A_DDR1_CKE
NC
A_DDR1_MCLK
AVDDIO_2.5V
A_DDR1_MCLKZ
A_DDR1_DQ15
AVDDIO_2.5V
A_DDR1_DQ14
A_MVREF
A_DDR1_DQ13
A_DDR1_DQ12
A_DDR1_DQ11
A_DDR1_DQ10
AVDDIO_2.5V
A_DDR1_DQ9
A_DDR1_DQ8
UDQS0
UDQM0
AVDD_PLL
DVDD_DDR_1.2V
LDQM0
LDQS0
AVDDIO_2.5V
NC NC
A_DDR1_DQ7 A_DDR1_DQ6 A_DDR1_DQ5
AVDDIO_2.5V
A_DDR1_DQ4 A_DDR1_DQ3 A_DDR1_DQ2 A_DDR1_DQ1
AVDDIO_2.5V
A_DDR1_DQ0
A_DDR1_WEZ
A_DDR1_CAS A_DDR1_RAS
A_DDR1_BA0
AVDDIO_2.5V
A_DDR1_BA1 A_DDR1_A10
A_DDR1_A0 A_DDR1_A1 A_DDR1_A2 A_DDR1_A3
NC NC
VDDC
GPIO21/PWM1 GPIO20/PWM0
VDDP_2
GPIO77/I2S_OUT_MUTE/PWM3/LVSYNC
GPIO76/I2S_IN_BCK/PWM2/LHSYNC
GPIO75/I2S_IN_SD/PWM5/TX3/LDE
GPIO74/I2S_IN_WS/PWM4/RX3/LCK
AVDD_LPLL
AVDD2P5_MOD
VDDC
R_ODD7/RXO0-
R_ODD6/RXO0+
R_ODD5/RXO1-
R_ODD4/RXO1+
R_ODD3/RXO2-
R_ODD2/RXO2+
R_ODD1/RXOC-
R_ODD0/RXOC+
G_ODD7/RXO3-
G_ODD6/RXO3+
G_ODD5/RXO4-
G_ODD4/RXO4+
G_ODD3/RXE0-
G_ODD2/RXE0+
AVDD2P5_MOD
G_ODD1/RXE1-
G_ODD0/RXE1+
B_ODD7/RXE2-
B_ODD6/RXE2+
B_ODD5/RXEC-
B_ODD4/RXEC+
B_ODD3/RXE3-
B_ODD2/RXE3+
B_ODD1/RXE4-
B_ODD0/RXE4+
NC
GPIO49
GPIO47
GPIO45
GPIO38
GPIO37
GPIO36
GPIO32/I2S_OUT_BCK
GPIO30/I2S_OUT_MCK
GPIO28
VDDP_1
VDDC
GPIO27/SPDIF_OUT
GPIO26/SPDIF_IN/RX1/PWM3
GPIO25/TUNER_SDA
GPIO24/TUNER_SCL
GPIO23/I2S_OUT_SD/TX2
GPIO22/I2S_OUT_WS/RX2
TAGC
SIFM
SIFP
AVDD25_PGA
VIFP
VIFM
AVSS_PGA
AVDD25_REF
AVDD_DMPLL
XTAL_OUT
XTAL_IN
NC
NC
NC
LINEOUT_R0
LINEOUT_L0
LINEOUT_R3
LINEOUT_L3
AVDD_AU33
LINEIN_R5
LINEIN_L5
LINEIN_R4
LINEIN_L4
LINEIN_R3
LINEIN_L3
AVDD_AU25 VAG VRP VRM LINEIN_R1 LINEIN_L1 LINEIN_R0 LINEIN_L0
CVBS_OUT1 VCOM CVBS0 CVBS1 CVBS2 CVBS3 CVBS4 AVDD3P3_ADC RIN1P GIN1M GIN1P SOGIN1 BIN1P AVDD2P5_ADC AVDD1P2
VSYNC0 RIN0P GIN0M GIN0P SOGIN0 BIN0P HSYNC0 VDDC NC NC
NC NC NC NC NC ARC DDCDA_CK RX2P RX2N DDCDA_DA RX1P RX1N
AVDD_DVI_3.3V RX0P RX0N RXCP RXCN HOTPLUGA RESET
U?