Polaroid V23D series User manual

Date: April 15, 2005
Ver. : 1.1
V23D/V27D/V30D series
LCD-TV(NTSC)
Service Manual

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.
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
Example of antenna grounding
As per national electrical code
Antenna lead in wire
Antenna discharge
unit
Grounding conductors
Ground clamps
Power service
grounding
Electrode system unit
Ground clamp
Electric service
equipment
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.
1.2Product 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 1280 x 768 (WXGA)
Contrast ratio 400:1(typ)
Brightness 450cd/m2(typ)
Viewing Angle Over 170∘(Hor.) / 170∘(Vert.)
Display
OSD Language Chinese , English, French , German , Spanish
TV standard (CCIR) NTSC
TV Turning system PLL 181 Ch.
STEREO MTS+SAP
TV I/P
CATV 125 CH.
Composite Signal CVBS
Y, C Signal S-Video
Video I/P Composite Signal
Y, Pb Pr HDTV system (720p, 1080i)
Signal I/P DVI-I Connector
PnP compatibility DDC / 2B
I/P Frequency Analog：FH：31.5KHz to 60KHz
F
V ：56Hz to 75Hz
PC I/P
Recommended Analog：1024X768 (60Hz)
Audio 1：CVBS & S-Video
Audio 2：Y, Pb, Pr
Audio I/P Audio I/P：L/Rx3
Audio 3：PC
Video O/P Composite Signal TV only
Speaker (Build-in)：5W+5W (rms)@THD<10%
3.5mm miniature stereo phone jack
Audio O/P Audio O/P：L/Px3
Sound level output:：500 mV(rms)
PIP,VoV,3D De-interlace, 3D
comb-filter ,V-Chip, C.C. Settings Yes
Other Functions
Aspect Ration Switching Normal →Periscope → Zoom →Full
Power Supply AC 110V ~ 240V, 50/60Hz
Power Power Consumption ＜115W
Wight (net) 10.3Kg (Ref.) (Without Accessories)
Accessories Remote Control, Batteries, AC power cord
5

V27DXXX
ITEMS SPECIFICATION
Screen size 27＂wide TFT-LCD panel
Aspect Ratio 16：9
Resolution 1280 x 720(WXGA)
Contrast ratio 600:1 (typ)
Brightness 550cd/m2 (Typ)
Viewing Angle Over 170∘(Hor.) / 170∘(Vert.)
Display
OSD Language Chinese, English, French, German, Spanish
TV standard (CCIR) NTSC
TV Turning system PLL 181 Ch.
STEREO MTS+SAP
TV I/P
CATV 125 CH.
Composite Signal CVBS
Y, C Signal S-Video
Video I/P Composite Signal
Y, Pb Pr HDTV system (720p, 1080i)
Signal I/P DVI-I Connector
PnP compatibility DDC / 2B
I/P Frequency Analog：FH：31.5KHz to 60KHz
F
V ：56Hz to 75Hz
PC I/P
Recommended Analog：1024X768 (60Hz)
Audio 1：CVBS & S-Video
Audio 2：Y, Pb/Cb, Pr/Cr
Audio I/P Audio I/P：L/R x 3
Audio 3：PC
Video O/P Composite Signal TV only
Speaker (Build-in)：10W+10W (rms)
3.5mm miniature stereo phone jack
Audio O/P Audio O/P：L/P x 3
Sound level output:：500 mV(rms)
PIP,VOV,3D De-interlace, 3D
comb-filter ,V-Chip, C.C. Settings Yes
Other Functions
Aspect Ration Switching Normal → Periscope → Zoom →Full
Power Supply AC 110V ~ 240V, 50/60Hz
Power Power Consumption ＜140W
Wight (net) 14.5Kg (Ref.) (Without Accessories)
Accessories Remote Control, Batteries, AC power cord
6

V30DXXX
ITEMS SPECIFICATION
Screen size 29.6＂wide TFT-LCD panel
Aspect Ratio 15：9
Resolution 1280 x 768 (WXGA)
Contrast ratio 600:1(typ)
Brightness 550cd/m2(Typ)
Viewing Angle Over 170∘(Hor.) / 170∘(Vert.)
Display
OSD Language Chinese , English, French , German , Spanish
TV standard (CCIR) NTSC
TV Turning system PLL 181 Ch.
STEREO MTS+SAP
TV I/P
CATV 125 CH.
Composite Signal CVBS
Y, C Signal S-Video
Video I/P Composite Signal
Y, Pb, Pr HDTV Ready (720p, 1080i)
Signal I/P DVI-I Connector
PnP compatibility DDC / 2B
I/P Frequency Analog：FH：31.5KHz to 60KHz
F
V ：56Hz to 75Hz
PC I/P
Recommended Analog：1024X768 (60Hz)
Audio 1：CVBS & S-Video
Audio 2：Y, Pb/Cb, Pr/Cr
Audio I/P Audio I/P：L/Rx3
Audio 3：PC
Video O/P Composite Signal TV only
Speaker (Build-in)：10W+10W (rms)
3.5mm miniature stereo phone jack
Audio O/P Audio O/P：L/Px3
Sound level output: 500 mV(rms)
PIP,VoV,3D De-interlace, 3D
comb-filter ,V-Chip, C.C. Settings Yes
Other Functions
Aspect Ration Switching Normal → Periscope → Zoom →Full
Power Supply AC 110V ~ 240V, 50/60Hz
Power Power Consumption ＜150W
Wight (net) 15.2Kg (Ref.) (Without Accessories)
Accessories Remote Control, Batteries, AC cord, AC power cord
7

PC I/P
Mode
No.
Mode Name
Resolution
H.Freq.(KHZ)
V.Freq.(HZ)
H. Polarity
V. Polarity
Pixel
CLK
(MHZ)
1 VGA 70HZ
640*350
31.469
70.087 ＋
－25.175
2 VGA 60HZ
640*480
31.469
59.941 －
－25.175
3 VGA 72HZ
640*480
37.861
72.81 －
－31.5
4 VGA 75HZ
640*480
37.5
75.0 －
－31.5
5 SVGA 60HZ
800*600
35.16
56.25 ＋
＋36.0
6 SVGA 60HZ
800*600
37.879
60.317 ＋
＋40.0
7 SVGA 72HZ
800*600
48.077
72.188 ＋
＋50.0
8 SVGA 75HZ
800*600
46.875
75.0 ＋
＋49.5
9 XGA 60HZ
1024*768
48.363
60.004 －
－65.0
10 XGA 70HZ
1024*768
56.476
70.069 －
－75.0
11 XGA 75HZ
1024*768
60.023
75.029 ＋
＋78.75
12 MAC VGA
640*480
35.0
66.667 －
－30.24
13 MAC VGA
832*624
49.725
74.550 －
－57.283
14 US TEXT
720*400
31.469
70.087 －
＋28.322
15 WXGA
1280*768
47.73
60 －
－80
16 WXGA
1280*720
45
60 ＋
＋74.25
8

PC I/P
Mode
No.
Mode Name
Resolution
H.Freq.(KHZ)
V.Freq.(HZ)
H. Polarity
V. Polarity
Pixel
CLK
(MHZ)
1 VGA 70HZ
640*350
31.469
70.087 ＋
－25.175
2 VGA 60HZ
640*480
31.469
59.941 －
－25.175
3 VGA 72HZ
640*480
37.861
72.81 －
－31.5
4 VGA 75HZ
640*480
37.5
75.0 －
－31.5
5 SVGA 60HZ
800*600
35.16
56.25 ＋
＋36.0
6 SVGA 60HZ
800*600
37.879
60.317 ＋
＋40.0
7 SVGA 72HZ
800*600
48.077
72.188 ＋
＋50.0
8 SVGA 75HZ
800*600
46.875
75.0 ＋
＋49.5
9 XGA 60HZ
1024*768
48.363
60.004 －
－65.0
10 XGA 70HZ
1024*768
56.476
70.069 －
－75.0
11 XGA 75HZ
1024*768
60.023
75.029 ＋
＋78.75
12 MAC VGA
640*480
35.0
66.667 －
－30.24
13 MAC VGA
832*624
49.725
74.550 －
－57.283
14 US TEXT
720*400
31.469
70.087 －
＋28.322
15 WXGA
1280*768
47.73
60 －
－80
16 WXGA
1280*720
45
60 ＋
＋74.25
8

DVI I/P
Mode
No.
Mode Name
Resolution
H.Freq.(KHZ)
V.Freq.(HZ)
H. Polarity
V. Polarity
Pixel
CLK
(MHZ)
1 VGA 60HZ
640*480
31.469
59.941
－
－
25.175
DVI
2 SVGA 60HZ
800*600
37.879
60.317
＋
＋
40.0
DVI
3 XGA 60HZ
1024*768
48.363
60.004
－
－
65.0
DVI
4 US TEXT
720*400
31.47
70.08
＋
＋
28.320
DVI
9