Skyworth 168P-P24TTU-20 User manual

Skyworth Group R&D Academy
PowerSupplyServiceManual
Product Name: 168P-P24TTU-20
File Name：
Current Version：1.0
No. of Pages：
Design：
Verification：
Authorization：
Date of issue：2010-05-25

168P-P24TTU-20PowerSupplyServiceManual
I
CHANGELOG
Version Date  Note Design Verification Authorization
1.0 2010‐5‐5 NewDesign 黄德强 钟小斌 鲍晓杰
Change

Change
Version

168P-P24TTU-20PowerSupplyServiceManual
II
CONTENTS
No. Name Page
1 ProductSummary1
2 CircuitDescription2
3 MainChipDescription3
4 PCBTop/BottomLayerScreenPrinting8
5 Troubleshooting8
Resources
1、Latestchipdrivers/softwareinventory
\\172.16.111.249\Home\开发中心\技术管理部\技术管理部查询快捷方式\内销软件资料查询一览表
2、Chipproductde s i g n information(includingeachupdateandversioninformation)
A、\\172.16.111.249\Home\开发中心\技术管理部\技术管理部查询快捷方式\内销设计资料查询总目录
B、\\172.16.111.249\Home\开发中心\技术管理部\技术管理部查询快捷方式\外销设计资料查询总目录
3、ChipBOMinventory
PleaselogintoSAP

168P-P24TTU-20PowerSupplyServiceManual
1
WARNING
This particular service manual is only for experienced maintenancestaff.Itisnotapplicabletousual
customers. No other warning has been given within this manual regarding non‐professionals trying to
operate relevant products. For people other than experienced expertandtechnicalpersonnel,making
adjustments or performing procedures to products described in thismanualmayresultinseriousinjury,
somemayevenendupinlife‐threateningsituation.
1 ProductSummary
1.1 PowerSupplyOverview
Thisversionofpowersupplycontainsa42‐inchuniversalpoweradapter:+5V/0.5Aoutput;overall
powerloss≤1W(240VACLoad70mA);fullprotectionabilities;lowcost;inputvoltagerangeswidelyfrom
90Vto264V.
1.2 MainTechnicalStandard
1.2.1 InputFeatures
Input voltage range 输入电压
90Vac to 264Vac
Normal voltage range 标称输入 100Vac to 240Vac
Frequency range 频率范围 50Hz/60Hz±5%
Max input ac current
满载输入电流
0.8Amax at 100VAC input & full load condition
Inrush current (cold start)
浪涌电流
50Atyp peak, 120Vac; 100Atyp peak, 220Vac
Efficiency(full load) 效率 85%min @ 220Vac,Full Load
Harmonic current 谐波电流 Meet GB17625.1-1998/IEC61000-3-2 class D
Leakage Current 泄漏电流 Less Than 0.75mA, 230Vac input
Standby Power Loss 待机功耗 ≦1W, 240Vac input,70mA Load
Input Fuse 输入保险 T3.15A L/250Vac
1.2.2 OutputFeatures
Output Voltage
输出电压
Regulation
调整率
Min. current
最小电流
Rated current
额定电流
Peak current
峰值电流
+12V +12V±7% 0.5A 2.5A 4.5A
+5V +5V±7% 0.5A 2A 2A
+5VSB +5VSB±7% 0.1A 0.1A 0.5A
Note:* pulse width within 100ms 脉宽小于 100 毫秒。

168P-P24TTU-20PowerSupplyServiceManual
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1.2.3 OutputRippleandNoise
Output Voltage Ripple & Noise (Max.)
+12V 120mVp-p@25℃
+5V 100mVp-p@25℃
Note: 1) Measurements shall be made with an oscilloscope with 20MHz bandwidth.
示波器带宽须设置在 20 兆赫兹。
2) Outputs shall be bypassed at the connector with a 0.1uF ceramic capacitor and a 10uF
electrolytic capacitor to simulate system loading.
电源输出端并联 0.1uF 的陶瓷电容和 10uF 的电解电容来模拟负载测试。
2 CircuitDescriptions
2.1 OverallDiagram
2.2 InformationAboutEachSubCircuit
2.2.1 PWMcircuit：ON  NCP1271P65G
MainFeatures：
a.Frequency Jittering For Softened EMI Signature
b.Internal High-Voltage Startup Current Source for Lossless Startup
c.Intrenal Latch for Easy Implementation of Overvoltage and Overtemperature Protection
d. Adjustable Skip Level
2.2.2 Inverte circuit：O2MICRO OZ9910BSN
MainFeatures：
a.Controller for high-voltage DC/AC converters
b.Soft start function
c.Built-in open-load protection,over-voltage protection,over-current protection,and TUV
protection。
transformer
EMI
Filter
Rectiflier
110-220V
A
C
＋12V/2.5A
+5V/2.5A
OUTPUT

168P-P24TTU-20PowerSupplyServiceManual
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3 MainChipDescriptions
3.1 PWMChip
3.1.1 ChipBlockDiagram
3.1.2 ChipPinDiagram
3.1.3 ChipPinFunctions

168P-P24TTU-20PowerSupplyServiceManual
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3.2 DriverChip
3.2.1 ChipBlockDiagram
3.2.2ChipPinDiagram

168P-P24TTU-20PowerSupplyServiceManual
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3.2.3ChipPinFunctions

168P-P24TTU-20PowerSupplyServiceManual
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4 PCBTop/BottomLayerScreenPrinting
4.1 TopLayerScreenPrintingDiagram
4.2BottomLayerScreenPrintingDiagram
5Troubleshooting
5.1 CommonMalfunctionsAnalysis

168P-P24TTU-20PowerSupplyServiceManual
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1、No+5VSBoutput
Ifno+5VSBoutputisdetected,please  examiningwhetherIC7  isstillworkingnormally.IfitsVCCpin’s
voltageisregular,firstensurethattheIC’speripheralcircuitisworkingproperly,thenchecktheIC7.Ifthe
VCCpin’svoltageisnotnormal,examinethepowerlineof  IC7.
2、+5VSBoutputnormal，butno+12V
Firstly, make sure PS_ON is in high electric level.
Secondly, make sure Q62 PIN1 is in low electric level with multimeter. If no, check all electric
circuit of Q63. If still found no problem, change Q62.
3、+5VSB abnormal voltage
Checktheloopof+5VSB, reference voltage of IC5(TL431), photo coupler IC6 sequentitally.

4、TroubleshootingDiagram
TroubleshootingDiagram1
No+5VSB
N Y
Y
N
Y
N
Examinethereason
AreIC5andIC6damaged?
Changethedamagedcomponent
ExaminethevoltageofC66:
127‐340V?
CheckperipheralcircuitsofIC7、Q61
ExamineF61,D61,TH6, 
changethedamagedunit
If5Voutputisshort‐circuited

168P-P24TTU-20PowerSupplyServiceManual
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5.2 DefinitionsofPortsandConnections
5.2.1 PIN10CN8SocketDefinition
NO. Pin Connection Function
1 ENA BL_ON/OFF
2 ADJ BL_ADJUST
3 GND GND
4 GND GND
5 GND GND
6 +5V +5V DC OUTPUT
7 +5V +5V DC OUTPUT
8 +12V +12V DC OUTPUT
9 +12V +12V DC OUTPUT
10 GND GND
11 GND GND
12 STB POWER_ON/OFF
13 GND GND
14 +5VSB +5VSB DC OUTPUT
Note: CN8 TYPE : 2.0mm
5.3 SparePartInventoryofCriticalComponent
No. SeriesNumber Model Position
Name/Functio
ns
/Parameter
SparePart 
Number
Note
1 471U-N12711-0070 NCP1271P65G IC7 PWM chip
2 4600-K36730-0000 2SK3673-01M Q61 MOS tube
3 5100-066001-0000 BCK-60-01LP T61 transformer
4 4500-220A15-00 FCH20A15
D66
D67
D69
schottky diode
5 4734-P817C0-04 PC817C IC6 photocoupler
6 476K-Z99100-0160 OZ9910BSN IC1 Inverter chip
7 4600-P21030-0000 P2103ND5G Q1 Q2 MOS tube

168P-P24TTU-20PowerSupplyServiceManual
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8 5100-092242-0000 BCK-2242WH T1 Inverter
transformer
5.4 Storage,TransportationandUsageCondition
5.4.1 Packaging
Allpackagesmustcontainname,modelnumber,labeling,manufacturingdateandqualitycertificateissued
byrelatedqualitycontroldepartment.
5.4.2Transportation
Transportbymeansofvehicle,shipandairplaneareallapplicable. During the transport, awnings, sun
protectionandgentlehandlingshouldalwaysbeapplied.
5.4.3Storage
Whennotused,productsshouldbestoredinsidethepackagingbox.Theacceptablestoragetemperatureis
between ‐40℃to55℃ with relative humidity between 10% to 95%. No hazardous gas, flammable or
explosivematerialsareallowedinthewarehouse,norarecorrosivechemicals.Inaddition,anykindofstrong
mechanicalvibration,shockandstrongmagneticfieldshouldbeavoidedduringthestorage.  Also,packaging
boxisrequiredtobekeptatleast20cmfromtheground,50cmfromwalls, heat sources,windowsandair
inlets. Under the above circumstances, storage will normally expirein2years.Afull‐scaleexaminationis
expectedafterthat.

12345678
A B C D
8
7654321
D
C B A
Title
Number RevisionSize
A3
Date: 19-Sep-2009 Sheet of File: E:\
自制电源
\24
寸电源
\
原理图
\20090919(2).DDBDrawn By:
C65
2N2F AC250V-400V
R77 1K R71
10K
R79 1K
C74 50V/0.22UF
R72 3.9K
IC5
AS431A
L02 5UH
D63 EG01C
C68 50V/22UF
R66 100K
1 2
4 3
IC6 PC817C
R67 330
C72 50V/470PF
C73
50V/1000PF
FB
2
CS
3
HV 8 Drv 5
NC 7
VCC 6
Gnd
4
Dmg
1
IC7 NCP1271P
R61 47
Q61
2SK3673
D68
1N4148WS
C69 630V/0.0047UF
NC C67 2KV/100PF
R69 10
R82 4.7K
C77
25V/2200UF
C79
25V/1000UF
93
2 7 6 4
12 11 8
6:1 600UH
T61
R63 0.39/2W
C75 1KV/0.001UF
D66 20A/150V
C71 50V/1000PF
F61
3.15A L 250V AC
C62 224 L62
13mH
TH6 10
C64 102 C63 102
C61 224
D61 KBJ6JA
L61 13mH
R60 2.2M C66
450V/82UF
R74 3.9K
D65 BA158
R64 10K
R65 22
R73 68K
L01 5UH
C76
10V/2200UF C78
10V/1000UF
C70 1KV/0.001UF
D69 20A/150V
CN8
1 2 3
CN0
100-250V AC
L63
R24
47K
Q63
1815
NC C26A
1UF
R28
100
R26 1K
R25 100K
C26
0.1UF
GND
C12 47nF
C11 2.2uF
C5 1nF
C10 2.2uF
C9
2.2uF
C3
4700pF
R2
2.2M
C2 150pF/NPO
R1 1M/1%
R3 10K
NDRV2
3
PDRV1 16
GNDA
4
PDRV3 15
HSB 14
CT
5
VIN 13
VREF 12
ISEN 11
LCT
6
CMP_SST 10
VSEN 9
ADJ
7
ENA
8
PGND
2
NDRV4
1
OZ9910
U1
R8 130K
R5 2.2M
R4 51k R9
75k C4
1nF
R10 10
C6 0.1u
R7 0
R6
0
5V
OUT_5V
NDRV1 NDRV2
1 2
CNN1
1 2
CNN2
R20 470R/1%
R17 510R
1 2
CNN3
1 2
CNN4
C25 33nF
D3 1N4148
R18 1M C24
100nF
R16
100K Q3
2N7002
FB
C17
5PF/6KV
C21 3.3nF R13
30K
VS
C16
5PF/6KV
C20
3.3nF
R12 30K
C19 5PF/6KV
C23 3.3nF R15
30K
VS
C18 5PF/6KV
C22 3.3nF R14
30K
R11 1M C13
10nF
FB
VS
8 5
3 2 1 4
. .
7 6
T1 22:2100:2100 320mH
PDRV1
NDRV1
+12V IN NDRV2
PDRV3
C14 4.7UF/50V C15 4.7UF/50V
PS
3
ND 8
PG
4
ND 7
PD 6 PD 5
NG
2
NS
1
Q1 P2103N
PS
3
ND 8
PG
4
ND 7
PD 6 PD 5
NG
2
NS
1
Q2 P2103N
C80 1000uF/25V
PDRV1 PDRV3
R19 1k
R1A 150K/1%
NC C26 100nF
ENA
R22 0
R21 0
BL_ON/OFFBL_ADJUST
BL_ON/OFF BL_ADJUST
D1 1N4148 D2 1N4148
D5 1N4148
D4 1N4148
D6 1N4148
D7 1N4148
D6720A/150V
R70 10 /2W
C60 50V/0.001UF
+5.1V OUT
168P-P24TTU-20
VER:00.00
D71 15V
Q62
P2003 Q61
P2003
1 2 3 4 5 6 7 8 9 10 11 12 13 14
BL_ON/OFF BL_ADJUST GND GND GND +5V +5V +12V +12V GND GND POWER-ON/OFF GND STANDBY-5V
R27 470
R28
100K
D81N4148
C27 1UF
R30
1K
NC C27A
1UF
R29 470
VDR601 PQ0270
R58 220
R59 220
VDR602
VDR603 GS35
GS35