: 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.
Service Manual
COLOR Television
CHASSIS :
Model :
CP-520V
DTX-21G2/21B4/21U7
P/N:TCP520VEF0
Dec. 2006
CP-520V Service Manual
1
CONTENTS
DOCUMENT HISTORY3
1 MAIN FEATURES4
1.1 SPECIFICATIONS 4
1.1.1 GENERAL4
1.1.2 EURO-SCART 1 (21 Pin)4
1.1.3 EURO-SCART 2 (21 Pin)5
1.2 CHANNEL/FREQUENCY TABLE6
2 SAFETY INSTRUCTION9
3 ALIGNMENT INSTRUCTIONS10
3.1 MICROCONTROLLER CONFIGURATION : SERVICE MODE10
3.2 SERVICE MODE NAVIGATION10
3.3 MICROCONTROLLER CONFIGURATION : OPTION BITS10
3.4 OPTION 111
3.5 OPTION 211
3.6 NVM DEFAULT SETTING12
3.7 TV SET ALIGNMENT14
3.7.1 G2 ALIGNMENT14
3.7.2 WHITE BALANCE14
3.7.3 FOCUS14
3.7.4 VERTICAL GEOMETRY14
3.7.5 HORIZONTAL PICTURE CENTRING14
3.7.6 AGC14
4 IC DESCRIPTION15
4.1 UOC III SERIES15
4.1.1 IC MARKING AND VERSION15
4.1.2 BLOCK DIAGRAM16
4.1.3 PINNING17
4.1.4 FEATURES20
4.2 LA42032 STEREO AUDIO AMPLI FIER23
4.2.1 FEATURES24
4.3 LA78040 VERTICAL AMPLIFIER26
4.3.1 FEATURES26
4.4 24WC16 - 16 KB EEPROM28
4.5 STR - W675429
4.5.1 GENERAL DESCRIPTION29
4.5.2 FEATURES29
4.5.3 BLOCK DIAGRAM29
4.5.4 PIN DESCRIPTION30
4.5.5 CONTROL PART - ELECTRICAL CHARACTERISTICS30
CP-520V Service Manual
2
5 CIRCUIT DESCRIPTION32
5.1 BLOCK DIAGRAM32
5.2 FUNCTIONAL DESCRIPTION OF VIDEO PROCESSOR33
5.2.1 Vision IF amplifier33
5.2.2 QSS sound circuit33
5.2.3 FM demodulator33
5.2.4 Audio input selector and volume contro34
5.2.4.1 STEREO AND AV STEREO VERSIONS34
5.2.4.2 MONO VERSIONS34
5.2.5 CVBS and Y/C input signal selection34
5.2.5.1 ALL VERSIONS34
5.2.6 Synchronisation circuit35
5.2.7 Horizontal and vertical drive36
5.2.8 Chroma, luminance and feature processing36
5.2.9 Colour decoder37
5.2.10 RGB output circuit38
5.2.11 I2C-BUS USER INTERFACE DESCRIPTION40
5.3 GENERAL DESCRIPTION OF THE TV SOUND OF SOUND PROCESSOR40
5.3.1 Supported standards41
5.4 FUNCTIONAL DESCRIPTION SOUND PROCESSOR42
5.4.1 The UOC III TV Sound Concept42
5.4.2 Functional Overview Of the digital controller sound part43
5.4.3 Demodulator and decoder44
6 SERVICE PARTS LIST47
6.1 DTX-21G2FZP-SB47
7 EXPLODED VIEW52
7.1 DTX-21G252
7.2 DTX-21B453
7.3 DTX-21U754
8 PRINTED CIRCUIT BOARD55
8.1 4859813693(OLD PCB)55
8.2 4859816393(NEW PCB)56
9 SCHEMATIC DIAGRAM57
9.1 CP-520V57
CP-520V Service Manual
DOCUMENT HISTORY
VERSION DATE COMMENTS
V1.4607/07/06 Creation of document (Author JS KIM) for project CP520 50Hz TV.
3
1 MAIN FEATURES
1.1 SPECIFICATIONS
1.1.1 GENERAL
TV standard PAL - SECAM B/G D/K, PAL I/I, SECAM L/L’
Sound system NICAM B/G, I, D/K, L,
Power
consumption
CP-520V Service Manual
Tuner PAL, SECAM Colour system
AV PAL, SECAM, PAL 60, NTSC M, NTSC 4.43
FM 2Carrier B/G, D/K
59W
Sound Output
Power
Speaker 12W 8 ohm x2
Teletext system 10 pages memory FASTEXT (FLOF or TOP)
Aerial input 75 ohm unbalanced
Channel coverage Off-air channels, S-cable channels and hyperband
Tuning system frequency synthesiser tuning system
Visual screen size 51cm
Channel indication On Screen Display
Program Selection 100 programmes
Aux. terminal EURO-SCART 1 : Audio / Video In and Out, R/G/B
Remote Control
Unit
4.5W x 2 (at 60% mod, 10% THD)
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.
R-49C10
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
4
CP-520V 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 25KV at max beam current.
The high voltage must not, under any circumstances, exceed 29KV.
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.
9
CP-520V 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 1.46”.
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;
11
3.4OPTION 1
OPTION
B7B6B5B4B3B2B1B0
TOP
1
Teletext
OFF
TOP
0
Teletext
ON
3.5OPTION 2
B7B6B5B4B3B2B1B0
1
Fixed to
‘ 0’
0
FASTEXT
(FLOF)
OFF
FASTEXT
(FLOF) ON
JVC
remote
control
Daewoo
Remote
control
TUBE
4:3
TUBE
16:9
AVL
control
OFF
AVL
control
ON
VAI bit set
to 1 in
SECAM L
VAI bit set
to 0 in
SECAM L
PICTURE
TILT ON
PICTURE
TILT OFF
Dolby
Virtual
OFF
Dolby
Virtual
ON
5 keys
local
keyboard
7 keys
lacal
keyboard
SVHS3
disable
SVHS3
enable
Full
ATSS
Basic
ATSS
CP-520V Service Manual
TUNER OPTIONS
00 = Philips
01 = Not used
10 = Alps, LG
11 = Parstnic, SS
Double
Window
Enabled
Double
Window
Disabled
n.u.
Must
be set
to 1 for
future
compa
tibility
CHASSISMODEL
CP-520V
OPTION
BIT[b7…b0]
I001111103EDTX-21G2/B4/U7
II000011110F
DW[hex]REMARKS
OPTION1 “ b1,b0” depends on Tuner
CP-520V Service Manual
12
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.
CP-520V Service Manual
13
NVM DATA CHANGE LIST
No Register NameAddressDefault
1OCP_THRESHOLD0x58F0x91
2DCXO0x5900x4E
3AGC_PHILIPS0x5C10xAB
4AGC_NC0x5C20xAB
5AGC_ALPS, LG0x5C30xB6
6AGC_PARTSNIC0x5C40xB6
7AGC_PHILIPS_START0x5C50x16O x OF
8AGC_NC_START0x5C60x16
9AGC_ALPS, LG_START0x5C70x16
10AGC_PARTSNIC_START0x5C80x16
11AVLLEV0x6210x5
12Nor1_Bright0x64A0x23
13Nor1_contrast0x64B0x2E
14Nor1_Colour0x64C0x1C
15Nor1_Sharpness0x64D0x23
16Nor1_Tint0x64E0x20
17Nor1_JVC_Bri0x64F0x2D
18Nor1_JVC_Cont0x6500x2A
19Nor1_JVC_Colour0x6510x1B
20Nor1_JVC_Sharp0x6520x23
21Nor2_Bright0x6530x28
22Nor2_Contrast0x6540x13
23Nor2_Colour0x6550x19
24Nor2_Sharpness0x6560x1B
25Nor2_Tint0x6570x20
26PresetGainRGB0x6730x2A
27PresetGainRGB0x6740x2A
28PresetGainRGB0x6750x2A
29Cathode_Drive0x67B0x1
30Y_delay_PAL_BG0x6860x5
31Y_delay_SECAM_BG0x6870x8
32Y_delay_PAL_DK0x6880x5
33Y_delay_SCM_DK0x6890x5
34Y_delay_PAL_I0x68A0x7
35Y_delay_SECAM0x68B0x5
36Y_delay_SECAM-L0x68C0x8
37Y_delay_AV0x68D0xA
38G2_Bright0x68E0x1A
39G2_Contrast0x68F0x42
(hex)CP-520V
21G2/B4/U7
<
<
<
<
<
<
O x OF
O x OF
O x OF
<
<
<
<
<
<
<
<
<
<
<
<
<
<
O x 10
O x 10
O x 10
<
O x 02
O x 0B
O x 0
O x 08
O x 0B
O x 07
O x 07
O x 05
0x28
-
-
-
-
-
-
-<
-
-
-
-
-
-
-
-
-
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-
-
-
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-
-<
CP-520V Service Manual
14
3.7 TV SET ALIGNMENT
3.7.1 G2 ALIGNMENT
- Tune a colour bar pattern.
- Find the “G2 – SCREEN” item in service mode.
- 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 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).
15
4 IC DESCRIPTION
CP-520V 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
1 P1.5/TX Port 1.5 or UART bus
2 P1.4/RX port 1.4 or UART bus
3 P1.2/INT2 port 1.2 or external interrupt 2
4 VSSC3 Ground
5 VDDC3 digital supply to core (1.8V)
6 P2.5/PWM4 port 2.5 or PWM4 output
7 P2.4/PWM3 port 2.4 or PWM3 output
8 VSSC/P digital ground for m-Controller core and periphery
9 P3.3/ADC3 port 3.3 or ADC3 input
10 P3.2/ADC2 port 3.2 or ADC2 input
11 DECV1V8 decoupling 1.8 V supply
12 VDDC1 digital supply to core (+1.8 V)
13 P3.1/ADC1 port 3.1 or ADC1 input
14 P3.0/ADC0 port 3.0 or ADC0 input
15 P2.3/PWM2 port 2.3 or PWM2 output
16 P2.2/PWM1 port 2.2 or PWM1 output
17 P2.1/PWM0 port 2.1 or PWM0 output
18 P2.0/TPWM port 2.0 or Tuning PWM output
19 VDDP(3.3V)
20 P1.7/SDA port 1.7 or I2C-bus data line
21 P1.6/SCL port 1.6 or I2C-bus clock line
22 P1.3/T1 port 1.3 or Counter/Timer 1 input
23 P0.0/I2SDI1/O port 0.0 or I2S digital input 1 or I2S digital output
24 P0.1/I2SDO1 port 0.1 or I2S digital output 1
25 P0.2/I2SDO2 port 0.2 or I2S digital output 2
26 P0.3/I2SCLK port 0.3 or I2S clock
27 P0.4/I2SWS port 0.4 or I2S word select
28 VSSC2 Ground
29 VDDC2 digital supply to core (1.8 V)
30 P1.1/T0 port 1.1 or Counter/Timer 0 input
31 P1.0/INT1 port 1.0 or external interrupt 1
32 INT0/P0.5
33 VDDadc(1.8) supply voltage video ADC
34 VSSadc ground for on-chip temperature sensor
35 VDDA2(3.3) supply voltage SDAC (3.3 V)
36 VDDA(1.8) analogue supply for audio ADCs (1.8 V)
37 GNDA Ground
38 VREFAD reference voltage for audio ADCs (3.3/2 V)
39 VREFAD_POS positive reference voltage (3.3 V)
40 VREFAD_NEG negative reference voltage (0 V)
41 VDDA1
42 BO Blue output
supply to periphery and on-chip voltage regulator (3.3
V)
external interrupt 0 or port 0.5 (4 mA current sinking
capability for direct drive of LEDs)
analog supply for TCG m-Controller and digital supply
for
TV-processor (+3.3 V)
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