: In this Manual, some parts can be changed for improving. their
performance without notice in the parts list. So, if you need the
latest parts information, please refer to PPL(Parts Price List)in
Service Information Center(http://svc.dwe.co.kr)
28” : 66cm
Channel indication On Screen Display
Program Selection 100 programmes
Aux. terminal EURO-SCART 1 : Audio / Video In and Out, R/G/B
In, Slow and Fast switching.
EURO-SCART 2 : Audio / Video In and Out, SVHS
In.
AV3 : Audio-Video Jack on front of cabinet.
Headphone jack (3.5 mm) on front of cabinet
SVHS3 (option) : Jack on front of cabinet – sound
input common with AV3.
Remote Control
Unit
R-46G22
1.1.2 EURO-SCART 1 (21 Pin)
Pin Signal Description Matching value
1 Audio Output Right
2 Audio Input Right
3 Audio Output Left
4 Audio Earth
5 Blue Earth
6 Audio Input Left
7 Blue Input
0.5 Vrms, Impedance < 1 kΩ, ( RF 54% Mod )
0.5 Vrms, Impedance > 10 kΩ
0.5 Vrms, Impedance < 1 kΩ, ( RF 54% Mod )
0.5 Vrms, Impedance > 10 kΩ
0.7 Vpp ±0.1V, Impedance 75Ω
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CP-520F Service Manual
8 Slow Switching TV : 0 to 2V, AV 16/9 : 4.5 to 7V, AV 4/3 : 9.5 to 12V , Impedance
> 10 kΩ
9 Green Earth
10 N.C.
11 Green Input
12 N.C.
13 Red Earth
14 Blanking Earth
15 Red Input
16 Fast Switching
17 Video Out Earth
18 Video In Earth
19 Video Output
20 Video Input
21 Common Earth
1.1.3 EURO-SCART 2 (21 Pin)
Pin Signal Description Matching value
1 Audio Output Right
2 Audio Input Right
3 Audio Output Left
4 Audio Earth
5 Earth
6 Audio Input Left
7 N.C.
8 N.C.
9 N.C.
10 N.C.
11 N.C.
12 N.C.
13 Earth
14 Earth
15 Chroma Input
16 N.C.
17 Earth
18 Video In Earth
19 Video Output
20 Video Input, Y In.
21 Common Earth
0.7 Vpp ± 0.1V, Impedance 75Ω
0.7 Vpp ± 0.1V, Impedance 75Ω
0 to 0.4V : Logic “0”, 1 to 3V : Logic “1”, Impedance 75Ω
2 SAFETY INSTRUCTION
WARNING: Only competent service personnel may carry out work involving the testing or repair
of this equipment.
X-RAY RADIATION PRECAUTION
1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid
such hazards, the high voltage must not exceed the specified limit. The nominal value of the high
voltage of this receiver is 25-26 KV (20”-21”) or 26 KV (25” - 28”) at max beam current. The high
voltage must not, under any circumstances, exceed 27.5 KV (20”), 29KV (21”), 29.5 KV (25") or
30 KV (28"). Each time a receiver requires servicing, the high voltage should be checked. It is
important to use an accurate and reliable high voltage meter.
2. The only source of X-RAY Radiation in this TV receiver is the picture tube. For continued
X-RAY RADIATION protection, the replacement tube must be exactly the same type tube as
specified in the parts list.
SAFETY PRECAUTION
Potentials of high voltage are present when this receiver is operating. Operation of the receiver
outside the cabinet or with the back board removed involves a shock hazard from the receiver.
Servicing should not be attempted by anyone who is not thoroughly familiar with the precautions
necessary when working on high voltage equipment.
Discharge the high potential of the picture tube before handling the tube. The picture tube is
highly evacuated and if broken, glass fragments will be violently expelled.
If any Fuse in this TV receiver is blown, replace it with the FUSE specified in the Replacement
Parts List.
When replacing a high wattage resistor (metal oxide film resistor) in the circuit board, keep the
resistor 10 mm away from circuit board.
Keep wires away from high voltage or high temperature components.
This receiver must operate under AC 230 volts, 50 Hz. NEVER connect to a DC supply or any
other voltage or frequency.
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this equipment have special safety-related
characteristics. These characteristics are often passed unnoticed by a visual inspection and the
X-RAY RADIATION protection afforded by them cannot necessarily be obtained by using
replacement components rated for higher voltage, wattage, etc. Replacement parts which have
these special safety characteristics are identified in this manual and its supplements, electrical
components having such features are identified by designated symbol on the parts list. Before
replacing any of these components, read the parts list in this manual carefully. The use of
substitutes replacement parts which do not have the same safety characteristics as specified in
the parts list may create X-RAY Radiation.
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CP-520F Service Manual
10
3 ALIGNMENT INSTRUCTIONS
3.1 MICROCONTROLLER CONFIGURATION : SERVICE MODE
To switch the TV set into service mode please see instruction below.
1 - Select PR. number 91
2 - Adjust sharpness to minimum and exit all menus.
3 – Within 2 seconds press the key sequence : RED - GREEN - menu
The software version is displayed beside the word Service, e.g. “SERVICE VER 00.05”.
To exit SERVICE menu press menu key or Std By key.
3.2 SERVICE MODE NAVIGATION
Pr Up/Down remote keys : cycle through the service items available.
Vol -/+ remote keys : Dec./Increment the values within range – Cycle trough option bits.
OK key : Toggle bits in option byte
Order Item Default setting
1 HOR CEN
2 RED GAIN
3 GRN GAIN
4 BLUE GAIN
5 RED BIAS
6 GRN BIAS
7 AGC LEVEL
8 G2 – SCREEN
9 OPTION1
10 OPTION2
11 AVL
12 PARABOLA
13 HOR WIDTH
14 CORNER T
15 CORNER B
16 HOR. PARAL
17 V. LINEAR
18 V. SLOPE
19 EW TRAPEZ
20 S CORRECT
21 VERT CENT
22 VERT SIZE
3.3 MICROCONTROLLER CONFIGURATION : OPTION BITS
There are two option bytes available (16 bits in all). These option bits are available from Service
mode. First find the OPTION1 or OPTION2 control, and then use the Volume PLUS/MINUS
buttons on the remote control keypad to locate the bits, and OK key to toggle them. The table
below shows the two option bytes available;
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3.4 OPTION 1
B7B6 B5 B4 B3 B2 B1 B0
TOP
1
Teletext
OFF
TOP
0
Teletext
ON
3.5 OPTION 2
B7B6 B5 B4 B3 B2 B1 B0
1
Fixed to
‘0’
0
OPTION SETTING BY MODEL
CHASSIS MODEL
CP-520
CP-520A
CP-520F
FASTEXT
(FLOF)
OFF
FASTEXT
(FLOF) ON
JVC
remote
control
Daewoo
Remote
control
DTY-28W5/80
DTY-21U7
DTC-20T2
DTC-21Y1/Y2
DTZ-2881/W8
DTZ-2481
DTZ-29U7/B3
TUBE
4:3
TUBE
16:9
AVL
control
OFF
AVL
control
ON
I 0011 1100 3C DTY-28A6/A7/A8
II 0000 1001 09
I 0001 1100 1C
II 0000 1001 09
I 0011 1100 3C
II 0000 1001 09
I 0011 1100 3C
II 0000 1001 09
I 0001 1000 18
II 0000 1001 09
I 0011 1000 38
II 0000 1001 09
VAI bit set
to 1 in
SECAM L
VAI bit set
to 0 in
SECAM L
PICTURE
TILT ON
PICTURE
TILT OFF
OPTION
BIT[b7…b0]
Dolby
Virtual
OFF
Dolby
Virtual
ON
5 keys
lacal
keyboard
7 keys
lacal
keyboard
DW[hex] REMARKS
SVHS3
disable
SVHS3
enable
Full
ATSS
Basic
ATSS
OPTION1 “b1,b0” depends on Tuner
OPTION2 “b1” –
From ver. 9.3B
Change to “1” - *1
If Sales Team
Request TILT
function
Change to OP 2 –
“b4” to “1” & *1
TUNER OPTIONS
01 = Not used
11 = Parstnic (DW)
Double
Window
Enabled
Double
Window
Disabled
00 = Philips
10 = Alps
n.u.
Must
be set
to 1 for
future
compa
tibility
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3.6 NVM default setting
The purpose of this message, when you change a virgin EEPROM, is to allow to modify
the NVM DATA to desired values.
1 - Introduction :
The NVM default valus are fixed for the user, but for flexibility in service, these data are stored in
NVM and can be changed when the TV set is in a special mode call "NVM EDITOR". This mode
can only be access from "FACTORY" mode.
2 - Entering into "FACTORY" mode.
To switch the TV set into FACTORY mode, use the factory remote control, and press on “SVC”
key. The factory menu will appear on the screen, showing “FACTORY” , plus other relevant
information like software version and date.
WARNING : When in "FACTORY" mode you should not press any key other than the keys
described in the procedure below. Unwanted key stroke could misadjust the TV set.
3 - Entering into "NVM EDITOR" mode.
To switch the TV set into NVM EDITOR mode, use the user remote control, and press on
“PICTURE/OK” key. The NVM EDITOR window will appear on the screen. This mode allow you
to access all data stored in NVM. The current NVM address is given in column "ADDR." in both
DECimal and HEXadecimal format. The column DATA gives the value contained at selected
address in both DECimal and HEXadecimal format.
4 - Navigation in "NVM EDITOR" mode.
Use Program Up/Dwn keys to select the desired address. Use Volume Up/Dwn keys to change
the data at selected address. You must press "PICTURE/OK" key to store value after
modification.
The data can be adjusted between 0 and 63.
5 - Exit "NVM EDITOR" mode.
To switch the TV set back into FACTORY mode, use the user remote control, and press on
“MENU” key.
The factory menu will appear on the screen, showing “FACTORY”.
6 - Exit "FACTORY" mode.
To exit "FACTORY" mode, use the factory remote control, and press on “SVC” key.
The factory menu will disappear from the screen.
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NVM DATA CHANGE LIST
No Register Name Address Default 28A8 2880 21U7 2881 29U7 21Y1 20T2
- Adjust screen volume (on FBT) to bring the cursor to central position(Green).
3.7.2 WHITE BALANCE
- Select a dark picture and adjust RED BIAS and GRN BIAS to the desired colour temperature.
- Select a bright picture and adjust RED, GRN and BLUE GAIN to the desired colour temperature.
3.7.3 FOCUS
Adjust the Focus volume (on FBT) to have the best resolution on screen.
3.7.4 VERTICAL GEOMETRY
Adjust V. LINEAR (linearity), S CORRECT (S. Correction), VERT SIZE (Vertical amplitude),
VERT CENT (vertical centring) to compensate for vertical distortion.
3.7.5 HORIZONTAL PICTURE CENTRING
Adjust HOR CEN (Horizontal centre) to have the picture in the centre of the screen.
3.7.6 EAST / WEST CORRECTION
Adjust the PARABOLA, HOR WIDTH, CORNER, HOR PARAL, EW TRAPEZ, to compensate for
geometrical distortion.
HOR PARAL
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HOR WIDTH
adjust for 93% overscan.
PARABOLA
CORNER B & CORNER T
EW TRAPEZ
3.7.7 AGC
- Make sure option bits are correct for the tuner fitted on the chassis (See above how to change
option bits).
- Adjust the antenna signal level at 62 dBµV
- Tune a colour bar pattern.
- Find the “AGC” item in service mode.
- Press the key “OK” on the remote keypad and wait until AGC level stabilise to the optimum
value.
- Alternatively, use “Vol Up/Dwn” keys to adjust manually to the desired Tuner Take Over Point
(TOP).
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4 IC DESCRIPTION
CP-520F Service Manual
4.1 UOC
III
Series
The UOC
III
series combines the functions of a Video Signal Processor (VSP) together with a
FLASH embedded TEXT/Control/Graphics µ-Controller (TCG µ-Controller) and US Closed
Caption decoder. In addition the following functions can be added:
• Adaptive digital (4H/2H) PAL/NTSC combfilter
• Teletext decoder with 10 page text memory
• Multi-standard stereo decoder
• BTSC stereo decoder
• Digital sound processing circuit
• Digital video processing circuit
4.1.1 IC MARKING AND VERSION
Chassis IC marking OSD languages ATSS countries Text