Daewoo cp385 Service Manual

S/M No. : CP385P-010

Service Manual

51/55/63/71 Cm STEREO Color Television

MODEL

DTA-20 T1/T2/T3/T8 DTA-21 T1/T2/T5/T9/Y1

DTE-25 G6/G7 DTE-28 G2/G6/G7/96/98/

A6/A7/G8/B1

CHASSIS

CP-385 CP-385

CP-785 CP-785

DAEWOO ELECTRONICS CO., LTD.

http : //svc.dwe.co.kr DEC. 1999

Service manual CP-385 / CP-785

Contents

1 - Main features ................................................................................................................................. 2

1-1 Specifications .................................................................................................................... 2

1-2 Channel table .................................................................................................................... 4

1-3 ATSS sorting method ........................................................................................................ 7

2 - Safety instruction.......................................................................................................................... 9

3 - Alignment instructions ................................................................................................................. 10

3-1 Microcontroller configuration : Service mode .................................................................... 10

3-2 Microcontroller configuration : Option................................................................................ 10

3-3 TV set Alignment............................................................................................................... 10

4 - IC description ................................................................................................................................ 13

4-1 TDA936x TV signal processor - TXT with embedded m-Controller. ..................................13

4-2 MSP3415D Multistandard Sound Processor..................................................................... 21

4-3 TDA894xJ Stereo Audio Amplifier..................................................................................... 25

4-4 TDA835xJ Vertical Amplifier.............................................................................................. 26

4-4-1 TDA8357J............................................................................................................... 26

4-4-1 TDA8358J............................................................................................................... 28

4-5 TDA6107Q ........................................................................................................................ 29

4-6 24C08 8 Kbit EEPROM ..................................................................................................... 30

4-7 STR - F6653...................................................................................................................... 31

5 - Circuit description......................................................................................................................... 33

5-1 Block diagram.................................................................................................................... 33

5-2 IF ....................................................................................................................................... 37

5-3 Source switching ............................................................................................................... 39

5-4 m-Controller I/O pin configuration and function.................................................................. 39

5-5 Sound processing.............................................................................................................. 40

5-6 Sound amplification........................................................................................................... 43

5-7 Vertical deflection .............................................................................................................. 43

5-8 Power supply (STR F6653)............................................................................................... 45

5-9 TV start-up, TV normal run and stand by mode operations ..............................................49

6 -Service parts list............................................................................................................................. 56

6-1 DTA-21Y1L(CP-385) ........................................................................................................ 56

6-2 DTE-28G2F(CP-785)......................................................................................................... 62

7 - Exploded view ...............................................................................................................................

8 - PCB Layout....................................................................................................................................

9 - Circuit Diagram..............................................................................................................................

Service manual CP 385 / CP785

1-1 Specifications

TV standard Sound system

Power consumption

Sound Output Power

Speaker

Teletext system Aerial input Channel coverage Tuning system Visual screen size

Channel indication Program Selection Aux. terminal

Remote Control Unit

21 Pin EURO-SCART 1 :

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 8 Slow Switching TV : 0 to 2V, AV 16/9 : 4.5 to 7V, AV 4/3 : 9.5 to 12V ,

9 Green Earth 10 N.C.

PAL - SECAM B/G D/K, PAL I/I, SECAM L/L’ NICAM B/G, I, D/K, L, FM 2Carrier B/G, D/K 21” : 49 W approx. 28” : 75 W approx. 21” : 4.5W x 2 (at 60% mod, 10%THD) 28” : 7W x 2 (at 60% mod, 10%THD) 20”, 21” : 7W 8 ohm x2 25”, 28” : 12W 8 ohm x2 10 pages memory FASTEXT (FLOF or TOP) 75 ohm unbalanced Off-air channels, S-cable channels and hyperband frequency synthesiser tuning system 20” : 48 cm 21” : 51 cm 25” : 59 cm 28” : 66cm On Screen Display 100 programmes EURO-SCART 1 : Audio / Video In and Out, R/G/B In, Slow and Fast switching. EURO-SCART 2 : Audio / Video In, SVHS In. Audio-Video Jack on front of cabinet in common connection with EURO-SCART 2. Headphone jack (3.5 mm) on front of cabinet R-40A01

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

Impedance > 10 kΩ

- 2 -

Pin Signal Description Matching value

11 Green Input

0.7 Vpp ± 0.1V, Impedance 75W 12 N.C. 13 Red Earth 14 Blanking Earth 15 Red Input 16 Fast Switching

0.7 Vpp ± 0.1V, Impedance 75W

0 to 0.4V : Logic “0” , 1 to 3V : Logic “1” , Impedance 75W 17 Video Out Earth 18 Video In Earth 19 Video Output 20 Video Input

1 Vpp ± 3dB, Impedance 75W

1 Vpp ± 3dB, Impedance 75W 21 Common Earth

21 Pin EURO-SCART 2 :

Pin Signal Description Matching value

1 N.C. 2 Audio Input Right

0.5 Vrms, Impedance > 10 kW 3 N.C. 4 Audio Earth 5 Earth 6 Audio Input Left

0.5 Vrms, Impedance > 10 kW 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

± 3dB for a luminance signal of 1 Vpp 16 N.C. 17 Earth 18 Video In Earth 19 N.C. 20 Video Input, Y In.

1 Vpp ± 3dB, Impedance 75W 21 Common Earth

Service manual CP 385 / CP785

- 3 -

1-2 Channel table

FREQUENCY TABLE CP385/CP785

CH EUROPE CCIR

46.25 47.75 (L') 45.75 49.75

48.25 55.75 (L') 53.75 59.25

55.25 60.5 (L') 61.75 77.25

62.25 63.75 (L') 175.25 85.25

175.25 176.00 183.25 93.25

182.25 184.00 191.25 175.25

189.25 192.00 199.25 183.25

196.25 200.00 207.25 191.25

203.25 208.00 215.25 199.25

210.25 216.00 223.25 207.25

217.25 189.25 (LUX)

224.25 69.25 (L') 239.25 223.25

53.75 76.25 (L') 247.25 -

- 83.25 (L') 49.75 -

82.25 90.25 57.75 -

- 97.25 65.75 -

183.75 - 77.75 -

192.25 - 85.75 -

201.25 - - -

- - - -

471.25 471.25 471.25 471.25

479.25 479.25 479.25 479.25

487.25 487.25 487.25 487.25

495.25 495.25 495.25 495.25

503.25 503.25 503.25 503.25

511.25 511.25 511.25 511.25

519.25 519.25 519.25 519.25

527.25 527.25 527.25 527.25

535.25 535.25 535.25 535.25

543.25 543.25 543.25 543.25

551.25 551.25 551.25 551.25

559.25 559.25 559.25 559.25

567.25 567.25 567.25 567.25

575.25 575.25 575.25 575.25

583.25 583.25 583.25 583.25

591.25 591.25 591.25 591.25

599.25 599.25 599.25 599.25

607.25 607.25 607.25 607.25

615.25 615.25 615.25 615.25

623.25 623.25 623.25 623.25

631.25 631.25 631.25 631.25

C01 C02 C03 C04 C05 C06 C07 C08 C09 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41

FRANCE GB(IRELAND)

Service manual CP 385 / CP785

EAST OIRT

231.25 215.25

- 4 -

CH EUROPE CCIR C42 C43 C44 C45 C46 C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62 C63 C64 C65 C66 C67 C68 C69 C70 C71 C72 C73 C74 C75 C76 C77

S01

S02

S03

S04

S05

S06

S07

S08

S09

639.25 639.25 639.25 639.25

647.25 647.25 647.25 647.25

655.25 655.25 655.25 655.25

663.25 663.25 663.25 663.25

671.25 671.25 671.25 671.25

679.25 679.25 679.25 679.25

687.25 687.25 687.25 687.25

695.25 695.25 695.25 695.25

703.25 703.25 703.25 703.25

711.25 711.25 711.25 711.25

719.25 719.25 719.25 719.25

727.25 727.25 727.25 727.25

735.25 735.25 735.25 735.25

743.25 743.25 743.25 743.25

751.25 751.25 751.25 751.25

759.25 759.25 759.25 759.25

767.25 767.25 767.25 767.25

775.25 775.25 775.25 775.25

783.25 783.25 783.25 783.25

791.25 791.25 791.25 791.25

799.25 799.25 799.25 799.25

807.25 807.25 807.25 807.25

815.25 815.25 815.25 815.25

823.25 823.25 823.25 823.25

831.25 831.25 831.25 831.25

839.25 839.25 839.25 839.25

847.25 847.25 847.25 847.25

855.25 855.25 855.25 855.25

863.25 863.25 863.25 863.25

69.25 - - -

76.25 - - -

83.25 - - -

90.25 - - -

97.25 - - -

59.25 - - -

93.25 - - -

105.25 104.75 103.25 105.25

112.25 116.75 111.25 112.25

119.25 128.75 119.25 119.25

126.25 140.75 127.25 126.25

133.25 152.75 135.25 133.25

140.25 164.75 143.25 140.25

147.25 176.75 151.25 147.25

154.25 188.75 159.25 154.25

161.25 200.75 167.25 161.25

FRANCE GB(IRELAND)

Service manual CP 385 / CP785

EAST OIRT

- 5 -

CH EUROPE CCIR

S10

S11

S12

S13

S14

S15

S16

S17

S18

S19

S20

S21

S22

S23

S24

S25

S26

S27

S28

S29

S30

S31

S32

S33

S34

S35

S36

S37

S38

S39

S40

S41

168.25 212.75 - 168.25

231.25 224.75 - 231.25

238.25 236.75 - 238.25

245.25 248.75 255.25 245.25

252.25 260.75 263.25 252.25

259.25 272.75 271.25 259.25

266.25 284.75 279.25 266.25

273.25 296.75 287.25 273.25

280.25 136.00 295.25 280.25

287.25 160.00 303.25 287.25

294.25 - - 294.25

303.25 303.25 - 303.25

311.25 311.25 311.25 311.25

319.25 319.25 319.25 319.25

327.25 327.25 327.25 327.25

335.25 335.25 335.25 335.25

343.25 343.25 343.25 343.25

351.25 351.25 351.25 351.25

359.25 359.25 359.25 359.25

367.25 367.25 367.25 367.25

375.25 375.25 375.25 375.25

383.25 383.25 383.25 383.25

391.25 391.25 391.25 391.25

399.25 399.25 399.25 399.25

407.25 407.25 407.25 407.25

415.25 415.25 415.25 415.25

423.25 423.25 423.25 423.25

431.25 431.25 431.25 431.25

439.25 439.25 439.25 439.25

447.25 447.25 447.25 447.25

455.25 455.25 455.25 455.25

463.25 463.25 463.25 463.25

FRANCE GB(IRELAND)

Service manual CP 385 / CP785

EAST OIRT

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Service manual CP 385 / CP785

1-3 ATSS sorting method

The TV set sweeps all the TV bands from beginning of VHF to end of UHF. The TV controlling software for each program checks if a VPS CNI code is transmitted. If no VPS CNI code is found, the system check if a CNI code is transmitted in the teletext lines ( Packet 8/30 format 1 ). If such a code ( VPS or teletext ) is found and if this code is in the ATSS list, the program is automatically named. The programs found are then sorted in 4 groups :

Group I : It contains all the programs from the selected country and named by the TV controlling software. Within this group the sorting order is fixed by the ATSS list.

Group II : It contains all the programs with a strong signal strength which are not listed in group I. Group III : It contains all the programs with a weak signal strength which are not listed in group I. Group IV : If two or more programs with the same code are found, only the strongest ( or if they have

the same level the one with the lowest frequency) is listed in group I, II or III. The others are listed in group IV.

Note : If two programs with the same name but a different code are found these two programs are listed in group I, II or III ( e.g. Regional program SW3 in Germany ).

The sorting order within group II, III, and IV is based on the channel frequency. The program with the lowest frequency is allocated the first rank in its group, and so forth until the last program of the group which has the highest frequency.

Program

Group Skip

number

1 2 Group I

...

n+1

... Group II m

m+1

... Group III

p+1

... Group IV

q+1

... not used

Program

number

1 ... Group II m

m+1

... Group III

p+1

... Group IV

q+1

... not used

Special case : Country selection = Others

Group Skip

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Service manual CP 385 / CP785

Special case : France If France is selected the TV controlling software sweeps the whole TV bands firstly with France system selected ( positive video modulation) and secondly with Europe system selected ( negative video modulation).

Special case : Switzerland If Switzerland is selected the TV controlling software sweeps the whole TV bands firstly with Europe system selected (negative video modulation) and secondly with France system selected ( positive video modulation).

Special case : GB Note for satellite receiver users : Before starting ATSS turn On your satellite receiver and tune “ SKY NEWS “. If GB is selected the TV controlling software seeks for programs only in UHF ( C21 to C70 ). The sorting order is : 1 - BBC1 2 - BBC2 3 - ITV 4 - CH4 5 - CH5 6 - NEWS

If two or more “ identical “programs ( same name but different code e.g. BBC1 and BBC1 Scotland ) are found the following programs in the list will be shifted up. (1 - BBC1, 2 - BBC1, 3 - BBC2, 4 ITV, 5 - CH4, 6 - CH5, 7 - NEWS, ..)

If one of the program above is not found, the associated program number remains empty ( freq.=467.25 Mhz - Skip selected - no name - system=GB). example A : 1 - BBC1, 2 - BBC2, 3 - ITV, 4 - -----, 5 - CH5, 6 - NEWS, ... example B ( if 2 BBC1 found ) : 1 - BBC1, 2 - BBC1, 3 - BBC2, 4 - ITV, 5 - -----, 6 - CH5, 7 NEWS, ...

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Service manual CP 385 / CP785

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

1. 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.

1) Servicing should not be attempted by anyone who is not thoroughly familiar with the

precautions necessary when working on high voltage equipment.

2) 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.

2. If any Fuse in this TV receiver is blown, replace it with the FUSE specified in the Replacement Parts List.

3. When replacing a high wattage resistor (oxide metal film resistor) in circuit board, keep the resistor 10 mm away from circuit board.

4. Keep wires away from high voltage or high temperature components.

5. This receiver must operate under AC 230 volts, 5O Hz. NEVER connect to DC supply or any other power 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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Service manual CP 385 / CP785

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 menu. 3 - Quickly press the key sequence : RED - GREEN - menu

To exit SERVICE menu press menu key or Std By key.

In Service Mode press “OK” to stop the microcontroller i.e. the I2C bus is free and the set can be controlled by external equipment. Press “OK” again to allow the microcontroller to control the set again

3-2 Microcontroller configuration : Option

Option

0 DAEWOO / SAMSUNG 1 DAEWOO / SAMSUNG 2 SIEL 3 PHILIPS Option 3 is available from software version 3 only

3-3 TV set Alignment 3-3-1 - G2 alignement

- TV in AV mode without video signal ⇒ Black screen.

- TV preset with WP Red, WP Green and WP Blue equal to 32.

- TV preset with Black R, Black G equal to 8.

- Set TV in NORMAL I mode

- Adjust screen volume ( on FBT ) such that the highest cathod cut-off voltage measured on CRT

board, is Vcut off ± 5V.

3-3-2 - White balance

- Select a dark picture and adjust Black G and Black R to the desired colour temperature.

- Select a bright picture and adjust WP Red, WP Green, WP Blue to the desired colour temperature.

3-3-3 - Focus

- Adjust the Focus volume ( on FBT ) to have the best resolution on screen.

Tuner maker Remark

Screen size Vcut-off

20” & 21” 125 V 25” & 28” 140 V

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Service manual CP 385 / CP785

3-3-4 - Vertical geometry

- Adjust the Vertical Amplitude, Shift, S-

Correction and Slope to compensate for vertical

distortion.

3-3-5 - Horizontal picture centering

- Adjust H Shift to have the picture in the center of the screen.

3-3-6 - East / West correction ( Chassis CP785 only )

- Adjust the H Parall, H Bow, H Width, EW Parabo, Up Corner, Dw Corner, EW trapez to compensate

for geometrical distortion.

H. Parall

H. Bow

H.Width

EW.Parabo

Up Corner

Dw Corner

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Service manual CP 385 / CP785

EW Trapez

3-3-7 - AGC

- Adjust the antenna signal level at 68 dBµV± 2 (UHF - CH25)

- Set RF AGC to 0.

- Increase RF AGC level and stop when the level on pin 6 of TDA936x goes below 2.5 Vdc

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Service manual CP 385 / CP785

4 - IC description

4-1 TDA936x TV signal processor - Teletext decoder with embedded µ-Controller.

TV-signal Processor

l Multi-standard vision IF circuit with alignment-free PLL demodulator l Internal (switchable) time-constant for the IF-AGC circuit l Source selection between 'Internal' CVBS and external CVBS or Y/C signals l Integrated chrominance trap circuit l Integrated luminance delay line with adjustable delay time l Asymmetrical ‘delay line type’ peaking in the luminance channel l Black stretching for non-standard luminance signals l lntegrated chroma band-pass filter with switchable centre frequency l Only one reference (12 MHz) crystal required for the µ-Controller, Teletext and the colour decoder l PAL / NTSC or multistandard colour decoder with automatic search system l Internal base-band delay line l RGB control circuit with 'Continuous Cathode Calibration', white point and black level off set

adjustment so that the colour temperature of the dark and the bright parts of the screen can be chosen independently. l Linear RGB or YUV input with fast blanking for external RGB/YUV sources. The Text/OSD signals are internally supplied from the µ-Controller/Teletext decoder

l Contrast reduction possibility during mixed-mode of OSD and Text signals l Horizontal synchronisation with two control loops and alignment-free horizontal oscillator l Vertical count-down circuit l Vertical driver optimised for DC-coupled vertical output stages l Horizontal and vertical geometry processing l Horizontal and vertical zoom function for 16 : 9 applications l Horizontal parallelogram and bow correction for large screen picture tubes

-Controller

l 80C51 µ-controller core standard instruction set and timing l 1µs machine cycle l 32 - 128Kx8-bit late programmed ROM l 3 - 12Kx8-bit Auxiliary RAM (shared with Display and Acquisition) l Interrupt controller for individual enable/disable with two level priority l Two 16-bit Timer/Counter registers l WatchDog timer l Auxiliary RAM page pointer l 16-bit Data pointer l IDLE and Power Down (PD) mode l 14 bits PWM for Voltage Synthesis Tuning l 8-bit A/D converter l 4 pins which can be programmed as general I/0 pin, ADC input or PWM (6-bit) output

Data Capture

l Text memory 10 pages

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Service manual CP 385 / CP785

l Inventory of transmitted Teletext pages stored in the Transmitted Page Table (TPT) and Subtitle Page Table (SPT)

l Data Capture for US Closed Caption l Data Capture for 525/625 line WST, VPS (PDC system A) and Wide Screen Signalling (WSS) bit

decoding Automatic selection between 525 WST/625 WST

l Automatic selection between 625 WST/VPS on line 16 of VBI l Real-time capture and decoding for WST Teletext in Hardware, to enable optimised µ-processor

throughput

l Automatic detection of FASTEXT transmission l Real-time packet 26 engine in Hardware for processing accented, G2 and G3 characters l Signal quality detector for video and WST/VPS data types l Comprehensive teletext language coverage l Full Field and Vertical Blanking lnterval (VBI) data capture of WST data

Display

l Teletext and Enhanced OSD modes l Features of lever 1.5 WST and US Close Caption l Serial and Parallel Display Attributes l Single/Double/Quadruple Width and Height for characters l Scrolling of display region l Variable flash rate controlled by software l Enhanced display features including overlining, underlining and italics l Soft colours using CLUT with 4096 colour palette l Globally selectable scan lines per row (9/10/13/16) and character matrix [12x10, 12xl3, 12x16

(VxH)]

l Fringing (Shadow) selectable from N-S-E-W direction l Fringe colour selectable l Meshing of defined area l Contrast reduction of defined area l Cursor l Special Graphics Characters with two planes, allowing four colours per character l 32 software redefinable On-Screen display characters l 4 WST Character sets (GO/G2) in single device (e.g. Latin, Cyrillic, Greek, Arabic) l G1 Mosaic graphics, Limited G3 Line drawing characters l WST Character sets and Closed Caption Character set in single device

Data Capture

The Data Capture section takes in the analogue Composite Vidéo and Blanking Signal (CVBS), and from this extracts the required data, which is then decoded and stored in memory.

The extraction of the data is performed in the digital domain. The first stage is to convert the analogue CVBS signal into a digital form. This is done using an ADC sampling at 12MHz. The data and clock recovery is then performed by a Multi-Rate Video Input Processor (MuIVIP). From the recovered data and clock the following data types are extracted WST Teletext (625/525), Closed Caption, VPS, WSS. The extracted data is stored in either memory (DRAM) via the Memory Interface or in SFR locations.

Data Capture Features

- Video Signal Quality detector

- 14 -

Service manual CP 385 / CP785

- Data Capture for 625 line WST

- Data Capture for 525 line WST

- Data Capture for US Closed Caption

- Data Capture for VPS data (PDC system A)

- Data Capture for Wide Screen Signalling (WSS) bit decoding

- Automatic selection between 525 WST/625WST

- Automatic selection between 625WST/VPS on line 16 of VBI

- Real-time capture and decoding for WST Teletext in Hardware, to enable optimised microprocessor throughput

- 10 pages stored On-Chip

- lnventory of transmitted Teletext pages stored in the Transmitted Page Table (TPT) and Subtitle Page Table (SPT)

- Automatic detection of FASTEXT transmission

- Real-time packet 26 engine in Hardware for processing accented, G2 and G3 characters

- Signal quality detector for WST/VPS data types

- Comprehensive Teletext language coverage

- Full Field and Vertical Blanking Interval (VBI) data capture of WST data

- 15 -

Service manual CP 385 / CP785

- 16 -

Service manual CP 385 / CP785

TV processor version and µ-Controller capacity

IC version TDA9365 Nx / 3 TDA9367 Nx /3

TV range 110° 90° QSS sound IF amplifier with separated input and AGC circuit PAL decoder SECAM decoder NTSC decoder Horizontal geometry (E-W) Horizontal and vertical zoom ROM size 64 k 64 k RAM size 2 k 2 k Teletext 10 pages 10 pages

IC marking and version

Chassis IC marking

OSD languages ATSS country Text

( line 3 )

CP 385 DW9367/N1/3-AEx

( note : x is the software version )

English, French, German, Italian, Spanish, Dutch, Danish, Finnish, Norwegian, Swedish

CP 385 DW9367/N1/3-ADx

( note : x is the software version )

English, Polish, Russian, Hungarian, Czech, Slovakian, Romanian, Greek

CP 785 DW9365/N1/3-BE x

( note : x is the software version )

English, French, German, Italian, Spanish, Dutch, Danish, Finnish, Norwegian, Swedish

ü ü ü ü ü ü

GB, France, Germany, Belgium, Spain, Italy, Switzerland, Austria, Denmark, Finland, Netherlands, Norway, Sweden, Ireland, Others Poland, Hungary, Czech rep., Others

GB, France, Germany, Belgium, Spain, Italy, Switzerland, Austria, Denmark, Finland, Netherlands, Norway, Sweden, Ireland, Others

ü ü ü ü

Pan-European ( West )

Pan-European, East, Cyrillic, Greek.

Pan-European ( West )

- 17 -

Service manual CP 385 / CP785

Chassis IC marking

OSD languages ATSS country Text

( line 3 )

CP 785 DW9365/N1/3-BDx

( note : x is the software version )

English, Polish, Russian, Hungarian, Czech, Slovakian,

Poland, Hungary, Czech rep., Others

Pan-European, East, Cyrillic, Greek.

Romanian, Greek

PINNING

SYMBOL PIN DESCRIPTION

n.u. 1 Port 1.3 Not used. SCL 2 I2C bus clock line SDA 3 I2C Data line SECAM L’ out 4 Port 2.0 : High when L’ selected (PushPull ) OCP 5 Port 3.0 : Over Current Protection RF AGC in 6 ADC 1 : For factory use only ( High impedance ) Key-in 7 ADC 2 : local key input ( High impedance ) S/SW 8 ADC 3 : Scart Slow switching input VssC/P 9

digital ground for µ-controller core and peripheral

LED 1 10 port 0.5 ( 8mA current sinking capability ) LED 2 11 port 0.6 ( 8mA current sinking capability ) VSSA 12 analog ground of teletext decoder and digital ground of TV processor SEC PLL 13 SECAM PLL decoupling VP2 14 2nd supply voltage TV-processor DECDIG 15 decoupling digital supply of TV-processor PH2LF 16 phase-2 filter PH1LF 17 phase-1 filter GND3 18 ground 3 for TV-processor DECBG 19 bandgap decoupling AVL/EWD 20 East / West drive output VDRB 21 vertical drive B output VDRA 22 vertical drive A output IFIN1 23 IF input 1 IFIN2 24 IF input 2 IREF 25 reference current input VSC 26 vertical sawtooth capacitor TUNERAGC 27 tuner AGC output SIFIN1 28 SIF input 1 SIFIN2 29 SIF input 2 GND2 30 ground 2 for TV processor SIF AGC 31 AGC sound IF REF0 32 n.u. HOUT 33 horizontal output FBISO 34 flyback input / sandcastle output

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Service manual CP 385 / CP785

SYMBOL PIN DESCRIPTION

QSS out 35 QSS intercarrier output EHT0 36 EHT/Overvoltage protection PLLIF 37 IF PLL loop filter IFVO 38 IF video output VP1 39 main supply voltage TV-processor CVBSINT 40 internal CVBS input GND1 41 ground 1 for TV-processor CVBS/Y 42 external CVBS/Y input CHROMA 43 chrominance input (SVHS) AMOUT 44 n.u. INSSW2 45 2nd RGB insertion input R2IN 46 2nd R input G2IN 47 2nd G input B2IN 48 2nd B input BCLIN 49 beam current limiter input BLKIN 50 black current input R0 51 RED Output G0 52 GREEN Output B0 53 BLUE Output VDDA 54 analog supply of Teletext decoder and digital supply of TV-Processor

(3.3V) VPE 55 OTP programming supply VDDC 56 digital supply to core (3.3V) OSCGND 57 oscillator ground supply XTALIN 58 crystal oscillator input XTALOUT 59 crystal oscillator output RESET 60 reset VDDP 61 digital supply to periphery (3.3V) Audio Mute 62 Port 1.0 : Audio mute output (PushPull ) Power 63 Port 1.1 : Power output (PushPull ) IR in 64 Interrupt input 0 : R/C Infrared input

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Service manual CP 385 / CP785

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Service manual CP 385 / CP785

4-2 MSP3415D Multistandard Sound Processor The MSP 3415D is designed as a single-chip Multistandard Sound Processor for applications in analogue and digital TV sets, video recorders, and PC cards.

MSP 3415D features

- sound IF input

- No external filters required

- Stereo baseband input via integrated AD converters

- Two pairs of DA converters

- Two carrier FM or NICAM processing

- AVC : Automatic Volume Correction

- Bass, treble, volume processing

- Full SCART in/out matrix without restrictions

- Improved FM-identification

- Demodulator short programming

- Autodetection for terrestrial TV - sound standards

- Precise bit-error rate indication

- Automatic switching from NICAM to FM/AM or vice versa

- Improved NICAM synchronisation algorithm

- Improved carrier mute algorithm

- Improved AM-demodulation

- Reduction of necessary controlling

- Less external components

Basic Features of the MSP 3415D

Demodulator and NICAM Decoder Section

The MSP 3415D is designed to simultaneously perform digital demodulation and decoding of NICAMcoded TV stereo sound, as well as demodulation of FM or AM mono TV sound. Alternatively, two carrier FM systems according to the German terrestrial specs can be processed with the MSP 3415D.

The MSP 3415D facilitates profitable multistandard capability, offering the following advantages:

- Automatic Gain Control (AGC) for analogue input: input range: 0.10 - 3 Vpp

- integrated A/D converter for sound-IF input

- all demodulation and filtering is performed on chip and is individually programmable

- easy realisation of all digital NICAM standards (B/G, I, L and D/K)

- FM-demodulation of all terrestrial standards (include identification decoding)

- no external filter hardware is required

- only one crystal clock (18.432 MHz) is necessary

- high deviation FM-mono mode (max. deviation: approx. ± 360 kHz)

DSP-Section (Audio Baseband Processing)

- flexible selection of audio sources to be processed

- performance of terrestrial de-emphasise systems (FM, NICAM)

- digitally performed FM-identification decoding and de-matrixing

- digital baseband processing: volume, bass, treble

- simple controlling of volume, bass, treble

Analogue Section

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Service manual CP 385 / CP785

- two selectable analogue pairs of audio baseband input (= two SCART inputs) input level: <2 V RMS, input impedance: >25 kΩ

- one selectable analogue mono input (i.e. AM sound): Not used in this chassis

- two high-quality A/D converters, S/N-Ratio: >85 dB

- 20 Hz to 20 kHz bandwidth for SCART-to-SCART copy facilities

- loudspeaker: one pair of four-fold oversampled D/A converters output level per channel: max. 1.4 VRMS output resistance: max. 5 kΩ S/N-ratio: >85 dB at maximum volume max. noise voltage in mute mode: < 10 µV (BW: 20 Hz... 16 kHz)

- one pair of four-fold oversampled D/A converters supplying a pair of SCART-outputs. output level per channel: max. 2 V RMS, output resistance: max. 0.5 kΩ, S/N-Ratio: >85 dB (20 Hz... 16 kHz)

Application Fields of the MSP 3415D

In the following sections, a brief overview about the two main TV sound standards, NICAM 728 and German FM Stereo, demonstrates the complex requirements of a multistandard audio IC.

NICAM plus FM/AM-Mono

According to the British, Scandinavian, Spanish, and French TV-standards, high-quality stereo sound is transmitted digitally. The systems allow two high-quality digital sound channels to be added to the already existing FM/AM-channel. The sound coding follows the format of the so-called Near Instantaneous Companding System (NICAM 728). Transmission is performed using Differential Quadrature Phase Shift Keying (DQPSK. Table below offers an overview of the modulation parameters. In the case of NICAM/FM (AM) mode, there are three different audio channels available: NICAM A, NICAM B, and FM/AM-mono. NICAM A and B may belong either to a stereo or to a dual language transmission. Information about operation mode and about the quality of the NICAM signal can be read by the controlling software via the control bus. In the case of low quality (high bit error rate), the controlling software may decide to switch to the analogue FM/AM-mono sound. Alternatively, an automatic NICAM-FM/AM switching may be applied.

German 2-Carrier System (DUAL FM System) Since September 1981, stereo and dual sound programs have been transmitted in Germany using the 2carrier system. Sound transmission consists of the already existing first sound carrier and a second sound carrier additionally containing an identification signal. More details of this standard are given in Tables below. For D/K very similar system is used.

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Service manual CP 385 / CP785

TV standards

TV system

B/G 5.5 / 5.7421875 FM Stereo PAL Germany B/G 5.5 / 5.85 FM-Mono / NICAM PAL Scandinavia,

L 6.5 / 5.85 AM - Mono / NICAM SECAM-L France I 6.0 / 6.552 FM-Mono / NICAM PAL UK D/K 6.5 / 6.2578125 D/K1

Position of sound carrier (MHz)

6.5 / 6.7421875 D/K2

6.5 / 5.85 D/K-NICAM

Sound modulation Color system Country

Spain

FM Stereo

FM-Mono / NICAM

SECAM-East USSR

Hungary

Pin connections and short description

Pin No.

1 TP Out Test pin 2 NC Not Connected 3 NC Not Connected 4 TP Out Test pin 5 TP Out Test pin 6 ADR_SEL In I2C bus Address select 7 STANDBYQ In Standby ( Low-active) 8 NC Not Connected 9 I2C_CL In / Out I2C Clock

10 I2C_DA In / Out I2C data

Pin Name Type Short description

Architecture of MSP3415D

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Service manual CP 385 / CP785

Pin No.

11 TP In / Out Test pin 12 TP In / Out Test pin 13 TP Out Test pin 14 NC Not Connected 15 TP Out Test pin 16 TP Out Test pin 17 TP Out Test pin 18 DVSUP Digital power supply +5V 19 DVSS Digital Ground 20 NC Not Connected 21 NC Not Connected 22 NC Not Connected 23 NC Not Connected 24 RESETQ In Power-On-reset 25 NC Not Connected 26 NC Not Connected 27 VREF2 Reference ground 2 high voltage part 28 DACM_R Out Loudspeaker out Right 29 DACM_L Out Loudspeaker out Left 30 NC Not Connected 31 TP Out Test pin 32 NC Not Connected 33 NC Not Connected 34 NC Not Connected 35 VREF1 Reference ground 1 high voltage part 36 SC1_OUT_R Out Scart output 1, right 37 SC1_OUT_L Out Scart output 1, left 38 NC Not Connected 39 AHVSUP Analog power supply 8.0V 40 CAPL_M Volume capacitor MAIN 41 AHVSS Analog ground 42 AGNDC Analog reference voltage high voltage part 43 NC Not Connected 44 NC Not Connected 45 NC Not Connected 46 NC Not Connected 47 NC Not Connected 48 ASG2 Analog Shield Ground 2 49 SC2_IN_L In Scart input 2 in, left 50 SC2_IN_R In Scart input 2 in, right 51 ASG1 Analog Shield Ground 1 52 SC1_IN_L In Scart input 1 in, left 53 SC1_IN_R In Scart input 1 in, right 54 VREFTOP Reference voltage IF A/D converter 55 MONO_IN In Mono input

Pin Name Type Short description

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Service manual CP 385 / CP785

Pin No.

56 AVSS Analog ground 57 AVSUP Analog power supply 58 ANA_IN1+ In IF input 1 59 ANA_IN1- In IF common 60 NC Not Connected 61 TESTEN In Test pin 62 XTAL_IN In Crystal oscillator 63 XTAL_OUT Out Crystal oscillator 64 NC Test pin

4-3 TDA894xJ Stereo Audio Amplifier

The TDA 8944J ( TDA 8946J ) is a dual-channel audio power amplifier with an output power of 2 x 7 W ( 2 x 15 W ) at an 8 W load and a 12 V supply. The circuit contains two Bridges Tied Load (BTL) amplifiers with an all-NPN output stage and standby/mute logic. The TDA8944J comes in a 17-pin DIL power package.

Features Few external components Fixed gain Standby and mute mode No on/off switching plops low standby current High supply voltage ripple rejection Outputs short-circuit protected to ground, supply and across the load Thermally protected

Pin description

Pin Symbol Description

1 OUT1- negative loudspeaker terminal 1 2 GND1 ground channel 1 3 Vcc1 supply voltage channel 1 4 OUT1+ positive loudspeaker terminal 1 5 n.c. not connected 6 IN1+ positive input1 7 n.c. not connected 8 IN1- negative input1 9 IN2- negative input2 10 MODE mode selection input 11 SVR half supply voltage decoupling

12 IN2+ positive input2

Pin Name Type Short description

(ripple rejection)

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Service manual CP 385 / CP785

Block diagram TDA8944J

4-4 TDA835xJ Vertical Amplifier

The TDA835xJ are power circuit for use in 90° and 110° colour deflection systems for field frequencies of 25 to 200Hz and 16/9 picture tubes. The circuit provides a DC driven vertical deflection output circuit, operating as a highly efficient class G system. Due to the full bridge output circuit the deflection coils can be DC coupled. The IC is constructed in a Low Voltage DMOS process that combines Bipolar, CMOS and DMOS devices. MOS transistors are used in the output stage because of the absence of second breakdown.

4-4-1 TDA8357J

Features :

- Few external components

- Highly efficient fully DC-coupled vertical output bridge circuit

- Short rise and fall time of the vertical flyback switch

- Guard circuit

- Temperature (thermal) protection

- High EMC because of common mode inputs

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Service manual CP 385 / CP785

Pinning

1 Vi(pos) input voltage (positive) 2 Vi(neg) input voltage (negative) 3 Vp supply voltage 4 VOB output voltage B 5 GND ground 6 Vflb flyback supply voltage 7 VOA output voltage A 8 V 9 VM input measuring resistor

Symbol Description

guard output voltage

O(guard)

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