Philco 168P-P32ELL-W1 Schematic

SKYWORTH R&D CENTER

Power Supply Service Manual

PART NO. : 168P-P32ELL-W1
DESCRIPTION ：
VERSION NO. ： 1.0
PAGE ： 13

DESCRIBED ： Zhou Cong

CHECKED ： Hu xiangfeng

APPROVED ： Bao xiaojie

Released Date: 2012-05-21

168P-P32ELL-W1 Service manual

Modification record

Edition

1.0 2012-5-21 First record Zhou Cong Hu Xiangfeng Bao Xiaojie

Modification

date

Record Described Checked Approved

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168P-P32ELL-W1 Service manual

Contents

NO. Main contents Page

1 General Description
2 General Introduction of Circuit
3 The main chip description
4 PCB TopOverlay or BottomOverlay
5 Maintenance instructions
6 The information of power supply designer
7 Schematic diagram

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2

3

7

8

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168P-P32ELL-W1 Service manual

Warning

This manual is only used for the experienced service person , and does not apply to the general

consumer。The manual does not have warnning or alert for the potential hazards caused of the non-technical
personnel attempting to repair this product . Electrical products should be an experienced professional and
technical personnel for maintenance and repair ,any other person attempts to maintain and repair the
products covered by this manual will likely be seriously hurt or even life-threatening.

1.General Description

1.1 General description of power supply

This power apply to 32-inch universal standard power interface; the total standby power consumption

less than 1W (5V DC the Load 50mA); protection functions; low cost; mature power supply structure; the
voltage range is 90-264V and wide supply voltage input.

1.2 Main technical specifications

1.2.1 Input Electrical Characteristics

Input voltage range

90Vac to 264Vac

Rated voltage range 100Vac to 240Vac
Frequency range 50Hz/60Hz±5%
Max input ac current 2Amax at 90VAC input & full load condition
Inrush current (cold start) 50Atyp peak, 120Vac; 100Atyp peak, 220Vac
Efficiency(full load) 82%min @ 115Vac,Full Load
Harmonic current Meet GB17625.1-1998/IEC61000-3-2 class D
Leakage Current Less Than 0.75mA, 230Vac input
Standby Power Loss ≦0.5W, 240Vac input,+5VDC 40mA Load
Input Fuse T3.15AL/250Vac

1.2.2 Output Electrical Characteristics

Output

Regulation Min. current Rated current Peak current

Voltage

+24V +24V±5% 0.1A 2.0A 2.5A
+12V +12V±5% 0.1A 2.0A 3.0A

+5VSB +5V±5% 0.1A 0.5A 0.8A

Note:* pulse width within 100ms .

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168P-P32ELL-W1 Service manual

1.2.3 Output ripple and noise

Output Voltage Ripple & Noise (Max.)

+24V 240mVp-p@25℃; 350mVp-p@-10℃
+12V 120mVp-p@25℃; 200mVp-p@-10℃

+5VSB 100mVp-p@25℃; 200mVp-p@-10℃;

Note: 1) Measurements shall be made with an oscilloscope with 20MHz bandwidth.

2) Outputs shall be bypassed at the connector with a 0.1uF ceramic capacitor and a 10uF
electrolytic capacitor to simulate system loading.

2.Circuit description）

2.1 The power circuit diagram

2.2 Each part of the circuit description

2.2.1 the main part of the circuit)：NXP TEA1733P

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168P-P32ELL-W1 Service manual

3. The main chip description

3.1 The main chip

3.1.1 The main chip general description

The main chip of power supply is the TEA1733P which is produced by NXP corporation.

The operating mode is CCM (continuous conduction mode), and the operating frequency is
65KHz.

3.1.2 The chip pin information

3

3.1.3 The chip block diagram

168P-P32ELL-W1 Service manual

3.1.4 The IC pin description

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168P-P32ELL-W1 Service manual

3.2 The DC-DC chip

3.2.1

frequency is 700KHz.

3.2.2

General description

The DC-DC used for standby chip, using SY8172Y, double synchronous rectification,and operating

The chip block diagram

3.2.3 The chip pin information

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168P-P32ELL-W1 Service manual

3.2.4 The pin description and the voltage

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168P-P32ELL-W1 Service manual

4. PCB TopOverlay and BottomOverlay

4.1 The power supply TopOverlay

4.2 The power supply BottomOverlay

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168P-P32ELL-W1 Service manual

5. Maintenance instructions

5.1 Common Fault Analysis and Notes

1.No +5VSB output voltage
If there is no +5VSB output voltage , we should focus on checking the DC-DC IC(IC301) and judge

whether the IC is operating . Monitor its VIN pin and check voltage is normal or abnormal . If it is normal ,
firstly , check the DC-DC IC peripheral circuit . Secondly, check DC-DC IC(IC301)and judge it has broken
or not. If the VIN pin voltage is abnormal, you need to check the IC100 power circuits.

2.+5VSB output is normal ,+12V output is abnormal

First, check +12 V voltage of the MOS transistor(Q300) S pole is normal or abnormal , if it is
normal,please check the MOS transistor(Q300) peripheral circuit is normal or not. If the +12 V voltage of
the MOS transistor(Q300) S pole is abnormal, please check the IC100 circuits.

3.+5VSB is abnormal

Check the +5 VSB feedback loop , and the reference voltage of the IC301 is normal or not.

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5.2 Service process

NO +5VSB

168P-P32ELL-W1 Service manual

Check + 5V output , Whether

the short-circuit

N

Is IC301 damaged?

N

Examine the positive voltage
of C312: 11.8V-12.2V?

N

Is IC100 damaged?

Y

Y

Y

Examine the reason

Change the damaged component

Check the peripheral circuit of
IC301

Y

Change the damaged component

N

Y

Check the peripheral
circuit of IC100

N

Examine the reason a n d

Change the damaged component

Examine overvoltage detection

circuit：Q304 ZD304 ZD302

ZD303

& Change the damaged component

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168P-P32ELL-W1 Service manual

5.2 Port and the connection defined

5.2.1 PIN11 CN200 Connection And Function

NO. Pin Connection Function

1 GND GND

2 GND GND

3 24V +24VDC OUTPUT

4 24V +24VDC OUTPUT

5 24V +24VDC OUTPUT

6 GND GND

7 ADJ ADJ

8 ENA ENA

9 GND GND

10 5VSB +5VSB DC OUTPUT
11 ON/OFF POWER_ON/OFF

Note: CN200 TYPE : 2.5mm

5.2.2 PIN14

CN300 Connection And Function

NO.

1 +24V +24V DC OUTPUT

2 +24V +24V DC OUTPUT

3 GND GND

4 GND GND

5 +12V +12V DC OUTPUT

6 +12V +12V DC OUTPUT

7 GND GND

8 GND GND

9 +5VSB +5VSB DC OUTPUT

Pin Connection Function

10 GND GND

11 ON/OFF POWER_ON/OFF
12 GND GND
13 ADJ BL_ADJUST
14 ENA BL_ON/OFF

Note: CN300 TYPE : 2.5mm

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168P-P32ELL-W1 Service manual

5.3 Key components and service parts list

Material

NO. Material number

models

1 4706-B17330-0080 TEA1733P IC100

2 47EC-S81721-0080 SY8172Y IC301

3 4600-P27610-00

4 4500-210200-0000

5 5132-064955-0000

6 47AH-P817C0-04 BPC-817C0 IC101

AOTF10N65

HBR10200HF

SANHE-42-102

Position
number

Q201

D301
D302

T101

Function

Main chip

DC-DC chip

Main MOS

Secondary

Schottky

transformer

Optocoupler

Substitute

Material

5.4 Storage, transportation and using conditions

5.4.1 Package

Box must have the product name, model, identification，quality inspection department certification，the

date of manufacture and so on.

Remar

k

5.4.2 Transportation

The productor adapted to cars, boats, aircraft transport .Transportation should be covered, prevented

sunshine and loading lightly.

5.4.3 Storage

Products should be stored in a box if it is not used .The storehouse environment temperature is from

-40 ℃ to -55 ℃, relatived humidity is from 10% to -95%. The storehouse must not allow any harmful
gases, flammable ,explosive and corrosive product chemicals, and must not allow strong mechanical
vibration, shock and strong magnetic field. Boxes should be at least 20cm high from the ground .The
distance from the wall, heat source, windows or air enter is at least 50cm. The storage period is about two
years, more than two years should be re-tested under the regulation .

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168P-P32ELL-W1 Service manual

6.Information of Power supply designers

Team Ⅱ Power Supply,R&D Center

Hu Xiangfeng and Zhou Cong

Email： [e-mail]
[e-mail]

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7. Schematic diagram

D101

VDR101

D102

213

2008*4

D104

-+

D103

4

C102

C101

472/1KV

472/1KV

LF102

1 2

3 4

CX102

471/400VAC

1 2

3 4

LF101

224/275VAC

N

CN101

10MH

10MH

CX101

TNR101

CY102

471/400VAC

2M/1/4W

2M/1/4W

123

L

R104

R102

R106

A2

R201

10K/1/4W

F101

FUSE T3.15A 250VAC

R105

100R/2W

474/275VAC

CY101

A1

R103

2M/1/4W

R101

2M/1/4W

TH101

5.0

C104

C103

+

+

68U 450V

68U 450V

R203A

R203

10M/1/2W

R202

10M/1/2W

10M/1/2W

R204

R202A

10M/1/2W

C202

ZD206

R216

27V

R217

200K/1/6W

C204

D201
IN4007

100R/2W

D202
IN4007

VDR102

ZD204

27V

168P-P32ELL-W1 Service manual

C301

102/1KV

SB10200

D301

D302

SB10200

102/1KV

R301
22R/1W

L301
5UH

C302

+

C303

104

1000U 35V

C305

R302
22R/1W

C310

C311

C309

+

+

104

1000UF25V

R312

220/1/4W

R314

1K/1/6W

C320

R315

10K/1/6W

224

IC300

TL431

+

C304

1000U 35V

Q301

C307

104

8050

R305A

10K/1/6W

R303

R305

Q308

20K/1/6W

2K/1/6W

L302
5uH

1000uF/25V

R313A

NC

4.7K/1/6W

PNP

+

C312

Q300

1000uF/25V

60N04

R313

R319

18K/1/6W

10k

C327

C328

R326

4.7K/1/6W

10UF

10uF

R316

R316A

NC

R310

R309

4.7K/1/6W

R328

10K/1/6W

1K/1/6W

Q303

PNP

Q302
PNP

R308

R300

1K/1/6W

500R/5W
ZD301
15V

D303

LL4148

R320
100k

R323

18k

R327

+12V/2A

+5V/0.5 A

C321

C332

+

22uF

R311

4.7K/1/6W

100uF/16V

ZD304

6V2

D305
LL4148

4.7K/1/6W

R304
20K/1/6W

PS_ON

2K/1/6WR306

+

C308A

NC

R307

10K/1/6W

+

C314

ZD302

1000uF/25V

27V

C323

103

R317

0R

IC301

IN

BST

2

5

L303

SW

6

FBEN

15uF

SY8172Y

8

1

4

C322

GND

220PF

ZD303

15V

D304

LL4148

R323A

62k

Q304

8050

C330

104

C210

R210

103/630V

100K 2W

D205

BA158

Q201

D206

2761

LL4148

R209

10K/1/6W

R207

R208

470K/1/4W

IC100

TEA1733

5

Visense

104

6

Protect

C203

7

104

8

Optimer

10K/1/6W

C205

R206
1M/1/6W

224

102

33R/1/6W

10R/1/6W

ZD205

R211

4

Isense

1K/1/6W

3

Driver

C206

102

GND2CTRL

1

VCC

C207

104

18V

R212

ZD202

33K/1/6W

C208

5V6

224

D207
BA158

+

ZD201

C209

27V

10U 50V

ZD203

SPECIFICATION
INPUT: 90-264V AC

+24V/2A

OUTPUT:

+12V/3A
+5VSB/0.5A

R213

0.18/2W

6R8/1/4W

R215

T101

9

10

7

8

15

16

5

1

11

2

12

13

CY105

222/400VAC

IC101

PC817C

1

4

27V

23

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