Polaroid V30D, V27D, V23D Service Manual

V23D/V27D/V30D series

LCD-TV(NTSC)

Service Manual

Date: April 15, 2005
Ver. : 1.1

Table of contents

1. Precautions & Notice.......................................………………….3

2. Features & Specifications............................................………….5

3. Connection & Applications.........................................................10

4. Controls Location ........................................................................12

5. Remote Control. ..........................................................................13

6. Disassembly Instructions.............................................................15

7. Block Diagram..............................................................................20

8. Troubleshooting .................................................................……..21

9. Electronic Circuit Description................................................…27

10. Circuit Diagram....................................................…………….31

11. PCB Layout....................................................…………………56

12. Electrical Part List.................................................................... 65

13. Mechanical Disassembly............................................................67

1. Precautions & Notice

1.1 Safety Precautions

1) Cleaning: Unplug the power cord from the AC outlet before cleaning the
product. Use a damp cloth to clean the product. Do not use liquid cleaners

or aerosol cleaners.

2) Heat sources: Keep the product away from heat sources such as radiators, heaters, stoves and
other heat-generating products (including amplifiers).

3) For added protection for this television equipment during a lightning storm,

or when it is left unattended and unused for long periods of time, unplug it

from the wall outlet and disconnect the antenna. This will prevent damage
to the equipment due to lightning and power-line surges.

4) If an outside antenna is connected to the television equipment, be sure the antenna system is
grounded so as to provide some protection against voltage surges.

Electric service
equipment

Example of antenna grounding
As per national electrical code

Ground clamp

Antenna lead in wire

Antenna discharge
unit

Grounding conductors
Ground clamps

Power service
grounding
Electrode system unit

5) An outside antenna system should not be located in the vicinity of overhead
power lines or other electric light or power circuits, or where it can fall into
such power lines or circuits. When installing an outside antenna system, extreme care should be
taken to keep from touching such power lines or

3

circuits as contact with them might be fatal.

6) Ventilation-The vents and other openings in the cabinet are designed for ventilation. Do not
cover or block these vents and openings since insufficient ventilation can cause overheating
and/or shorten the life of the product. Do
not place the product on a bed, sofa, rug or other similar surface, since they
can block ventilation opening. This product is not designed for built-in installation; do not place
the product in an enclosed place such as a bookcase
or rack, unless proper ventilation is provided or the manufacturer's instructions are followed.

1.2 Product Safety Notice

1) Many electrical and mechanical parts in this chassis provide special visual

safety protection. The protection afforded by them cannot necessarily be
obtained by using replacement components rated for higher voltage, wattage, etc.

2) Before replacing any of these components, read the parts list manual carefully.

The use of substitute replacement parts, which do not have the same safety characteristics, as
specified in the parts list may create shock, fire or other hazards.

1.3 Service Notes

1) When replacing parts or circuit boards, wrap the wires around terminals before soldering.

2) Keep wires away from high temperature components.

3) Keep cable and their shielding in their original position so as to reduce interference.

4

2. Specifications

Specification

V23DXXX

ITEMS SPECIFICATION

Screen size 23” wide TFT-LCD panel
Aspect Ratio 15：9
Resolution

Display

Contrast ratio 400:1(typ)

Brightness 450cd/m

Viewing Angle Over 170∘(Hor.) / 170∘(Vert.)
OSD Language Chin ese , English, French , German , Spanish
TV standard (CCIR) NTSC

TV I/P

Video I/P

PC I/P

Audio I/P Audio I/P：L/Rx3

Video O/P Composite Signal TV only

Audio O/P Audio O/P：L/Px3

Other Functions

Power

Wight (net) 10.3Kg (Ref.) (Without Accessories)

TV Turning system PLL 181 Ch.
STEREO MTS+SAP
CATV 125 CH.
Composite Signal CVBS
Y, C Signal S-Video
Composite Signal
Y, Pb Pr
Signal I/P DVI-I Connector
PnP compatibility DDC / 2B

I/P Frequency

Recommended Analog：1024X768 (60Hz)

PIP,VoV,3D De-interlace, 3D
comb-filter ,V-Chip, C.C. Settings
Aspect Ration Switching Normal → Periscope → Zoom →Full
Power Supply AC 110V ~ 240V, 50/60Hz
Power Consumption ＜115W

1280 x 768 (WXGA)

HDTV system (720p, 1080i)

Analog：F
F

Audio 1：CVBS & S-Video
Audio 2：Y, Pb, Pr
Audio 3：PC

Speaker (Build-in)：5W+5W (rms)@THD<10%

3.5mm miniature stereo phone jack
Sound level output:：500 mV(rms)

Yes

2

(typ)

：31.5KHz to 60KHz

H

：56Hz to 75Hz

V

Accessories Remote Control, Batteries, AC power cord

5

V27DXXX

ITEMS SPECIFICATION

Screen size 27＂wide TFT-LCD panel
Aspect Ratio 16：9

1280 x 720(WXGA)

Display

Resolution
Contrast ratio 600:1 (typ)

Brightness 550cd/m

Viewing Angle Over 170∘(Hor.) / 170∘(Vert.)
OSD Language Chin ese, English, French, German, Spanish
TV standard (CCIR) NTSC

TV I/P

Video I/P

PC I/P

Audio I/P Audio I/P：L/R x 3

Video O/P Composite Signal TV only

Audio O/P Audio O/P：L/P x 3

Other Functions

Power

Wight (net) 14.5Kg (Ref.) (Without Accessories)

TV Turning system PLL 181 Ch.
STEREO MTS+SAP
CATV 125 CH.
Composite Signal CVBS
Y, C Signal S-Video
Composite Signal
Y, Pb Pr
Signal I/P DVI-I Connector
PnP compatibility DDC / 2B

I/P Frequency

Recommended Analog：1024X768 (60Hz)

PIP,VOV,3D De-interlace, 3D
comb-filter ,V-Chip, C.C. Settings
Aspect Ration Switching Normal → Periscope → Zoom →Full
Power Supply AC 110V ~ 240V, 50/60Hz
Power Consumption ＜140W

HDTV system (720p, 1080i)

Analog：F
F

Audio 1：CVBS & S-Video
Audio 2：Y, Pb/Cb, Pr/Cr
Audio 3：PC

Speaker (Build-in)：10W+10W (rms)

3.5mm miniature stereo phone jack
Sound level output:：500 mV(rms)

Yes

2

(Typ)

：31.5KHz to 60KHz

H

：56Hz to 75Hz

V

Accessories Remote Control, Batteries, AC power cord

6

V30DXXX

ITEMS SPECIFICATION

Screen size 29.6＂wide TFT-LCD panel
Aspect Ratio 15：9
Resolution

Display

TV I/P

Video I/P

PC I/P

Audio I/P Audio I/P：L/Rx3

Video O/P Composite Signal TV only

Audio O/P Audio O/P：L/Px3

Other Functions

Power

Wight (net) 15.2Kg (Ref.) (Without Accessories)

Contrast ratio 600:1(typ)
Brightness 550cd/m2 (Typ)
Viewing Angle Over 170∘(Hor.) / 170∘(Vert.)
OSD Language Chin ese , English, French , German , Spanish
TV standard (CCIR) NTSC
TV Turning system PLL 181 Ch.
STEREO MTS+SAP
CATV 125 CH.
Composite Signal CVBS
Y, C Signal S-Video
Composite Signal
Y, Pb, Pr
Signal I/P DVI-I Connector
PnP compatibility DDC / 2B

I/P Frequency

Recommended Analog：1024X768 (60Hz)

PIP,VoV,3D De-interlace, 3D
comb-filter ,V-Chip, C.C. Settings
Aspect Ration Switching Normal → Periscope → Zoom →Full
Power Supply AC 110V ~ 240V, 50/60Hz
Power Consumption ＜150W

1280 x 768 (WXGA)

HDTV Ready (720p, 1080i)

Analog：F
F

Audio 1：CVBS & S-Video
Audio 2：Y, Pb/Cb, Pr/Cr
Audio 3：PC

Speaker (Build-in)：10W+10W (rms)

3.5mm miniature stereo phone jack
Sound level output: 500 mV(rms)

Yes

：31.5KHz to 60KHz

H

：56Hz to 75Hz

V

Accessories Remote Control, Batteries, AC cord, AC power cord

7

PC I/P

Mode

No.

1 VGA 70HZ

2 VGA 60HZ

3 VGA 72HZ

4 VGA 75HZ

5 SVGA 60HZ

6 SVGA 60HZ

7 SVGA 72HZ

8 SVGA 75HZ

9 XGA 60HZ

10 XGA 70HZ

11 XGA 75HZ

12 MAC VGA

13 MAC VGA

14 US TEXT

15 WXGA

16 WXGA

Mode Name

Resolution

640*350

640*480

640*480

640*480

800*600

800*600

800*600

800*600

1024*768

1024*768

1024*768

640*480

832*624

720*400

1280*768

1280*720

H.Freq.(KHZ)

V.Freq.(HZ)

31.469

70.087

31.469

59.941

37.861

72.81

37.5

75.0

35.16

56.25

37.879

60.317

48.077

72.188

46.875

75.0

48.363

60.004

56.476

70.069

60.023

75.029

35.0

66.667

49.725

74.550

31.469

70.087

47.73
60
45
60

H. Polarity

V. Polarity

＋
－
－
－
－
－
－
－
＋
＋
＋
＋
＋
＋
＋
＋
－
－
－
－
＋
＋
－
－
－
－
－
＋
－
－
＋
＋

Pixel

CLK

(MHZ)

25.175

25.175

31.5

31.5

36.0

40.0

50.0

49.5

65.0

75.0

78.75

30.24

57.283

28.322

80

74.25

8

PC I/P

Mode

No.

1 VGA 70HZ

2 VGA 60HZ

3 VGA 72HZ

4 VGA 75HZ

5 SVGA 60HZ

6 SVGA 60HZ

7 SVGA 72HZ

8 SVGA 75HZ

9 XGA 60HZ

10 XGA 70HZ

11 XGA 75HZ

12 MAC VGA

13 MAC VGA

14 US TEXT

15 WXGA

16 WXGA

Mode Name

Resolution

640*350

640*480

640*480

640*480

800*600

800*600

800*600

800*600

1024*768

1024*768

1024*768

640*480

832*624

720*400

1280*768

1280*720

H.Freq.(KHZ)

V.Freq.(HZ)

31.469

70.087

31.469

59.941

37.861

72.81

37.5

75.0

35.16

56.25

37.879

60.317

48.077

72.188

46.875

75.0

48.363

60.004

56.476

70.069

60.023

75.029

35.0

66.667

49.725

74.550

31.469

70.087

47.73
60
45
60

H. Polarity

V. Polarity

＋
－
－
－
－
－
－
－
＋
＋
＋
＋
＋
＋
＋
＋
－
－
－
－
＋
＋
－
－
－
－
－
＋
－
－
＋
＋

Pixel

CLK

(MHZ)

25.175

25.175

31.5

31.5

36.0

40.0

50.0

49.5

65.0

75.0

78.75

30.24

57.283

28.322

80

74.25

8

DVI I/P

Mode

No.

1

2

3

4

Mode Name

Resolution

VGA 60HZ

640*480

SVGA 60HZ

800*600

XGA 60HZ

1024*768

US TEXT

720*400

H.Freq.(KHZ)

V.Freq.(HZ)

31.469

59.941

37.879

60.317

48.363

60.004

31.47

70.08

H. Polarity

V. Polarity

－

－

＋

＋

－

－

＋

＋

Pixel

CLK

(MHZ)

25.175

DVI

40.0

DVI

65.0

DVI

28.320

DVI

9

3. Connection & Applications

(TV only)

10

Video Input device

˙DVD player
˙Satellite receiver
˙Set top box

˙VIDEO Inputdevice
˙Digital Camera

Note:

z Audio out: The level of Audio O/P is constant. It won’t be affected by aligning volume, treble and bass.

˙Satellite receive

˙Set top box

This connecter should be connected to outer audio amplifier to enlarge the volume.

z Video O/P: When user wants to connect Audio and Video O/P of our LCD-TV to VCR for recording

program, the O/P has only one choice that is TV mode.

z Audio O/P: IF the main display is TV, the Audio O/P must be TV sound; otherwise, if sub display is TV, the

Audio I/P must be selected to “Sub”, so that the Audio O/P will be TV sound.

11

4. Control Location

These buttons control your TV’s basic features, include the on-screen mean. To use the more
advanced features, you must the remote control.

POWER: turn on or turn off the LCD TV.
SOURCE: set up the input source (PC,VIDEO,SV,TV,CV).
MENU: display the main menu.
CHANEL (down/up): change channels on sequence.
VOLUME(+/-): turn up or turn down the volume.
ASPECT RATIO: set up the display (Normal, Periscope, Zoom or Full).

Speaker Speaker

Remote sensor window

Aim the remote control towards this region on the TV.

12

5. Remote Control

The remote control pad works almost as same as ordinary TV remote control that includes the basic
function needed while viewing a live video:

Other Function

PIP Function

TV

PC
AV
SV

CV

SWAP

VOL－

Reset

ARC

Subwoofer

Sleep
Power

Number Buttons

Return
Channel UP

Mute
MENU/Enter
VOL+

TITLE / EXIT
Channel DOWN

APC

Audio Function

13

Summary of Control Button

PPoowweerr ccoonnttrrooll

Press POWER button Direct to turn on or turn off the display

Selecting the signal source

Press TV button Direct to switch to the TV mode.
Press AV button Direct to switch to the AV Video mode.
Press SV button Direct to S-Video mode.
Press CV button Direct to switch to the Component mode (Y Pb Pr).
Press PC button Direct to switch to the PC mode.

Menu Setting

Press MENU/ENTER button Display the main on-screen menu or enter the next menu.
Press TITLE/EXIT button Display the current channel digits/Exit from the menu.

Changing Channels

Press UP button Press Up to change channel on the TV.
Press DOWN button Press Down to change channel on the TV.
Press 0~9，+100 button To select channels directly on the TV.
Press RETURN button Return to the previous channel on the TV.

Sound Control

Press VOL+ button Press to turn up the volume.
Press VOL- button Press to turn down the volume.
Press MUTE button Press to temporarily cut off the sound.
Press MTS button Press to choose stereo, mono or separate audio program supply the

Press AUDIO button Select present audio is main display or sub display.
Press TREBLE button Adjust the treble of audio.
Press BASS button
Press SUBWOOFER button.

PIP Control

Press ON/OFF button Press to watch one of video sources on sub display. Press again to make the

Press TV、AV、SV、CV button Press to select one of the PIP window input source.
Press SIZE button To make the PIP window double, large or small.
Press POSITION button Press to move the PIP window to：Top Left→Top Right→Bottom Right→

Other Function

Press SWAP button Change main display and sub display.
Press RESET button Return to the original factory settings.
Press ARC button In PC source：Set the picture window to full or normal.

Press APC button Select Normal, Clear, Dark, and Theater mode for picture control.
Press SLEEP button Press to select a present time interval for shut off.
Press V-CHIP button Set Parent Control function.
Press C.C button Set the caption of TV programs show on or off.
Press ADD button Add the channel of TV programs in TV source.
Press ERASE button Erase the channel of TV programs in TV source.

multi-channel sound services.

Adjust the bass of audio.
Open the subwoofer function.

sub display disappear.

Bottom Left→Repeat

In Video source：Set the picture window to normal→full→periscope→zoom.

14

6. Disassembly Instructions

A. Face down the LCD-TV :

Face down the LCD-TV on a smooth plane with a soft material to protect the panel faceplate.

B.Base Neck Removal Procedure :

1. Remove 2 screws from Neck Cover. (Indicated as “ A “)
Then you could take the Back Cover of neck apart from the LCD-TV

A

C. Base Removal Procedure:

1. Remove 4 screws from the Back Cover. (Indicated as “ B ” and “ C ”)
Then you could take Base (assembly) apart from the LCD-TV.

B

C

15

D. Tuner Cover & AV Cover Removal Procedure:

1. Remove Tuner Cover. (Indicated as “D”)

2. Remove AV Cover before, you should be loose the screw (Indicated as “E”)

E

D

E. Back Cover Removal Procedure:

1. Remove 8 screws from the Back Cover. ( Indicated as “ F “and “ G “ )

2. Remove a screw from the Tuner Board. (Indicated as “ I ”)

3. Take slide of tuner board.

Then you could take Back Cover apart from the LCD-TV.

F

F

G

G

16

I

F. Right/Left Side Covers and Tuner Board Removal Procedure:

6.1 Remove 4 screws from Slide of AV PCB & left side Covers. (Indicated as “ H ”)

6.2 Remove a screw from the Tuner Board. (Indicated as “ I ”)

6.3 Remove 3 screws from the power case assembly. (Indicated as “ J ”)

Then you could take Slide of AV PCB, Power case, and Left Side Covers Removal.

H

H

J

G. Main PCB Shield Removal :

1. Remove 2 screws from Main PCB Shield. (Indicated as “ K”)
Then you could take Main PCB Shield apart from Main Bracket and the PCB Board will
be shown on it .

K

17

H. Main PCB Removal procedure:

1. Remove 9 screws from the Main PCB. (indicated “ L “)

Then you could take Main PCB apart from the LCD-TV .

L

I. Panel Bracket Removal procedure:

1. Remove 4 screws from the Panel Bracket. (Indicated as “ M ”)

Then you could take Panel Bracket apart from the Front Cover.

M

18

19

t

g

7. Block Diagram

ANT

UT01

TV – Tuner

(Philips)

FQ1236 MK3

SIF

Audio
Video

I044

4:1

MTS & Audio Processor

MSP3440G

CV Audio

SV/A V Audio

PC Audio

I010

Audio Amp.

TFA9843)

10W + 10W
Speaker

Headphone
Subwoofer

CV

SV

AV

I033

V-Chip

Z8612912

I024

PI5V330

I035

3D Comb filter

TC90A65F

(or UPD64083)

VGA

DVI

PC

Interlaced

Pro

Interlaced

TV/AV

Video Decoder

SAA7117

ressive

ADC

AD9883A

Video Decoder

SAA7117

ADC

Silicon Image

Sil169

I018

8 bi

I006

I038

RAM

I031

I001

I040

I035

HY57V64

I037

De-Interlace

SiI504C

I032

P15V330

24 bit

Sync.

I019

Port V(Sub)

Scaler

TP6761

Port B(Main)

Port A(Main)

2

I

C

I009

Interface

THC63

LVDM83A

I020

RAM

HY57V16

LCD

Panel

23”/27”/30”

20

Remote Control

I013

IR Pad

Key Pad

I012

Micro Controller

TP2808)

INVERTER

E2PROM