Daewoo CP-785A Schematic

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S/M No. : TCP785AEF0

Service Manual

59/68 Cm STEREO Color Television

MODEL

DTE-25G5THS DTE-29G5TH

FS-59T90 FS-68T90

CHASSIS

CP-785A

DAEWOO ELECTRONICS CO., LTD.

http : //svc.dwe.co.kr NOV. 2000

Service manual CP-785A

Contents

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

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

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

2 - Safety instruction.......................................................................................................................... 7

3 - Alignment instructions ................................................................................................................. 8

3-1 Microcontroller configuration : Service mode .................................................................... 8

3-2 Microcontroller configuration : Option................................................................................ 8

3-3 TV set Alignment............................................................................................................... 8

4 - IC description ................................................................................................................................ 10

4-1 TDA936x TV signal processor - TXT with embedded m-Controller. ..................................10

4-2 MSP3415D Multistandard Sound Processor..................................................................... 18

4-3 TDA894xJ Stereo Audio Amplifier..................................................................................... 22

4-4 TDA835xJ Vertical Amplifier.............................................................................................. 23

4-4-1 TDA8358J............................................................................................................... 24

4-5 TDA6107Q ........................................................................................................................ 25

4-6 24C08 8 Kbit EEPROM ..................................................................................................... 26

4-7 STR-F6654 ....................................................................................................................... 27

5 - Circuit description......................................................................................................................... 29

5-1 Block diagram.................................................................................................................... 29

5-2 IF ....................................................................................................................................... 33

5-3 Source switching ............................................................................................................... 34

5-4 u-Controller I/O pin configuration and function.................................................................. 34

5-5 Sound processing.............................................................................................................. 35

5-6 Sound amplification........................................................................................................... 37

5-7 Vertical deflection .............................................................................................................. 37

5-8 Power supply (STR-F6654)............................................................................................... 39

5-9 TV start-up, TV normal run and stand by mode operations ..............................................43

6 -Service parts list............................................................................................................................. 50

FS-59T90 & FS-68T90 ........................................................................................................... 50

(DTE-25G5THS & DTE-29G5TH)

7 - Exploded view ............................................................................................................................... 59

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

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

1-1 Specifications

TV standard Sound system

Power consumption

Sound Output Power

Speaker

Teletext system Aerial input Channel coverage Tuning system Visual screen size

Service manual CP-785A

PAL, SECAM - B/G, H NICAM B/G FM 2Carrier B/G 25" : 113 W approx. 29" : 118 W approx. 25" : 5W x 5W (at 60% mod, 10%THD) 29" : 5W x 5W (at 60% mod, 10%THD) 25" : 7W 8 ohm x 2 29" : 7W 8 ohm x 2 10 pages memory FASTEXT (FLOF or TOP) 75 ohm unbalanced Off-air channels, S-cable channels and hyperband frequency synthesiser tuning system 25" : 59 cm 29" : 68 cm

Channel indication Program Selection Aux. terminal

On Screen Display 100 programmes INPUT1(SCART) : Audio / Video In, S-VHS In(with cable)

INPUT2(RCA) : Audio / Video In

OUTPUT(RCA) : TV OUT Headphone jack (3.5 mm) on front of cabinet

Remote Control Unit

R-40A01 / R-44N08(RD-D90)

RCA Jack - input 2

Pin Signal Description Matching value

1 Video Input 1.0 Vpp+/- 3dB , Impedance 75 ohm 2 Audio Input Left

0.5 Vrms, Impedance > 10k ohm

3 Audio Input Right 0.5 Vrms, Impedence > 10k ohm

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Service manual CP-785A

RCA Jack output

Pin Signal Description Matching value

1 TV Video 1.0Vpp +/- 3dB , Impedence 75 ohm 2 TV Audio Left 0.5Vrms at RF sound FM 54% Mod.(27kHz dev.) 3 TV Audio Right 0.5Vrms at RF sound FM 54% Mod.(27kHz dev.)

W W

21 pin Euro SCART - Input 1 / S-Video

Pin Signal Description Matching value

1 N.C. 2 Audio Input Right 3 N.C. 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 N.C 14 Earth 15 Chroma Input 16 N.C. 17 Earth 18 Video In Earth 19 N.C. 20 Video Input / Y Input 1 Vpp +/- 3dB, Impedance 75 ohm 21 Common Earth

0.5 Vrms, Impedance > 10 kW

+/- 3dB for a luminance signal of 1 Vpp

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1-2 Channel table

FREQUENCY TABLE CP-785A

CH AUSTRALIA N/Z'land C00 C01 C02 C03 C04

102.25

C05

138.25

C5A C06 C07 C08 C09 C10

216.75

C11

- 45.25

N01

- 55.25

N02

- 62.25

N03

- 203.25

N08

- 210.25

N09

- 217.25

N10

- C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41

46.25

57.25

64.25

86.25

95.25

175.25

182.25

189.25

196.25

209.25

- - - -

471.25

479.25

487.25

495.25

503.25

511.25

519.25

527.25

534.25

541.25

548.25

555.25

562.25

569.25

576.25

583.25

590.25

597.25

603.25

610.25

617.25

Service manual CP-785A

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CH AUSTRALIA N/Z'land 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

624.25

631.25

638.25

645.25

652.25

659.25

666.25

673.25

680.25

687.25

694.25

701.25

708.25

715.25

722.25

729.25

736.25

743.25

750.25

757.25

764.25

771.25

779.25

786.25

793.25

800.25

807.25

814.25

C70 - C71 - C72 - C73 C74 C75 - C76 - C77 -

S01

S02

S03

S04

S05

S06

S07

S08

S09

105.25

112.25

119.25

126.25

133.25

140.25

147.25

154.25

161.25

Service manual CP-785A

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CH AUSTRALIA N/Z'land

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

231.25

238.25

245.25

252.25

259.25

266.25

273.25

280.25

287.25

294.25

303.25

311.25

319.25

327.25

335.25

343.25

351.25

359.25

367.25

375.25

383.25

391.25

399.25

407.25

415.25

423.25

431.25

439.25

447.25

455.25

463.25

Service manual CP-785A

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Service manual CP-785A

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 26~28 KV (25” - 29”) at max beam current. The high voltage must not under any circumstances, exceed 29.5 KV (25") or 31 KV (29"). 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 240 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-785A

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 value and exit all menu. 3 - Quickly press the key sequence : RED - GREEN - menu

To exit SERVICE menu press menu key or Operate(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 for Daewoo Remote control 1 DAEWOO / SAMSUNG for Daewoo Remote control 4 DAEWOO / SAMSUNG for NEC Remote control 5 DAEWOO / SAMSUNG for NEC Remote control

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

25” 140V 29” 140V

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Service manual CP-785A

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

- 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.Parabola

Up Corner

Dw Corner

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Service manual CP-785A

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-785A

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 The Text/OSD signals are internally supplied from the -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-785A

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

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Service manual CP-785A

- 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

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Service manual CP-785A

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Service manual CP-785A

Chassis IC marking

OSD languages Capacity Text

CP-785A DW9365/N1/3-BDx

(OTP: TDA9365PS/

English

64K Pan-European, 10 pages Teletext

N1/5S

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-785A

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-785A

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Service manual CP-785A

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-785A

- 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-785A

TV standards

TV system

B/G 5.5 / 5.7421875 FM Stereo PAL Applied B/G 5.5 / 5.85 FM-Mono / NICAM PAL Applied

L 6.5 / 5.85 AM - Mono / NICAM SECAM-L N.A I 6.0 / 6.552 FM-Mono / NICAM PAL N.A 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 Remark

FM Stereo

FM-Mono / NICAM

SECAM-East

N.A

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-785A

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-785A

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 family Stereo Audio Amplifier

The TDA8946J is a dual-channel audio power amplifier with an output power of 2 x 7W at an 8 ohm 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 TDA8946J 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-785A

Block diagram TDA894xJ

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.

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4-4-1 TDA8358J

An East-West output stage is provided that is able to sink current from the diode modulator circuit.

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

- East-West output stage

Service manual CP-785A

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Service manual CP-785A

4-5 TDA6107Q The TDA6107Q includes three video output amplifiers in one plastic DIL-Bent-SIL 9-pin medium power package, using high voltage DMOS technology, and is intended to drive the three cathodes of a colour CRT directly. To obtain maximum performance, the amplifier should be used with black-current control.

Features

- Typical bandwidth of 5.5 MHz for an output signal of 60 Vpp

- High slew rate of 900V/ms

- No external components required

- Very simple application

- Single supply voltage of 200V

- Internal reference voltage of 2.5 V

- Fixed gain of 50.

- Black-current stabilisation (BCS) circuit

- Thermal protection

Pin description

Pin Symbol Description

1 V 2 V 3 V 4 GND ground (fin) 5 Iom black current measurement

6 VDD supply voltage 7 V 8 V 9 V

inverting input 1

i(1)

inverting input 2

i(2)

inverting input 3

i(3)

output

cathode output 3

OC(3)

cathode output 2

OC(2)

cathode output 1

OC(1)

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Service manual CP-785A

Block diagram TDA6107Q

4-6 24C08 8 Kbit EEPROM features :

- 8 Kbit serial I2C bus EEPROM

- Single supply voltage : 4.5 V to 5.5 V

- 1 Million Erase/Write cycles (minimum)

- 40 year data retention (minimum)

Pin description

Pin No. Name Description

1, 2, 3 E0, E1, E2 Device address

5 SDA Serial Data/Address Input/Output 6 SCL Serial clock 7 WC Write control 8 Vcc Supply voltage 4 Vss Ground

The memory device is compatible with the I2C memory standard. This is a two wire serial interface that uses a bi-directionnal data bus and serial clock. The memory carries a built-in 4-bit unique device type identifier code (1010) in accordance with the I2C bus definition.

Serial Clock (SCL) The SCL input is used to strobe all data in and out of the memory. Serial Data (SDA) The SDA pin is bi-directionnal, and is used to transfer data in or out of the memory

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Service manual CP-785A

4-7 STR - F6654

4-7-1 General description

The STR-F6654 is an hybrid IC with a build-in MOSFET and control IC, designed for flyback converter type switch mode power supply applications.

4-7-2 Features

- Small SIP fully isolated molded 5 pins package

- Many protection functions : * Pulse-by-pulse overcurrent protection (OCP) * Overvoltage protection with latch mode (OVP) * Thermal protection with latch mode (TSD)

4-7-3 Block diagram

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Service manual CP-785A

4-7-4 Pins description

pin name symbol description

1 Overcurrent / feedback O.C.P./ F.B. Input of overcurrent detection signal and

feedback signal 2 Source S MOSFET source 3 Drain D MOSFET drain 4 Supply VIN Input of power supply for control circuit 5 Ground GND Ground

4-7-5 Control part electrical characteristics

description

number min. typ. max.

Operation start voltage 4-5 VIN (on) 14.4 16 17.6 V Operation stop voltage 4-5 VIN (off) 9 10 11 V Circuit current in operation 4-5 IIN (on) - - 30 mA Circuit current in non-operation 4-5 IIN (off) - - 100 Maximum OFF time -

Minimum time for input of quaxi resonant signals Minimum off time - T

O.C.P./F.B. terminal threshold voltage 1 O.C.P./F.B. terminal threshold voltage 2 O.C.P./F.B. terminal extraction current O.V.P. operation voltage 4-5 VIN (OVP) 20.5 22.5 24.5 V Latch circuit sustaining voltage 4-5 IIN (H) - - 400

Latch circuit release voltage 4-5 VIN (La.off) 6.6 - 8.4 V Thermal shutdown operating temperature

4-7-6 MOSFET electrical characteristics

description

Drain-to-source breakdown voltage Drain leakage current 3-2 I On-resistance 3-2 RDS (on) - - 1.15

number min. typ. max.

Switching time 3-2 tf - - 250 nsec Thermal resistance -

IC pins

symbol

(max)

OFF

rating

45 - 55

1-5 TTH (2) - - 1.0

(min) - - 1.5

OFF

1-5 VTH (1) 0.68 0.73 0.78 V

1-5 VTH (2) 1.3 1.45 1.6 V

1-2 I

1.2 1.35 1.5 mA

OCP/FB

- TJ (TSD) 140 - -

IC pins

3-2 V

symbol

650 - - V

DSS

- - 300

DSS

CH -F

rating

- - 0.95

unit

µA µsec µsec

µsec

µA

unit

µA

Ω

C/W

- 28 -

5 - Circuit description

5-1 Block diagram

Service manual CP-785A

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Service manual CP-785A

FUNCTIONAL DESCRIPTION OF VIDEO PROCESSOR Vision IF amplifier

The vision IF amplifier can demodulate signals with positive and negative modulation. The PLL demodulator is completely alignment-free.

The VCO of the PLL circuit is internal and the frequency is fixed to the required value by using the clock frequency of the µ-Controller/Teletext decoder as a reference. The setting of the various frequencies is made by the controlling software in subaddress 27H (38.9 Mhz for all system).

Because of the internal VCO the IF circuit has a high immunity to EMC interferences.

QSS Sound circuit

The sound IF amplifier is similar to the vision IF amplifier and has an external AGC decoupling capacitor.

The single reference QSS mixer is realised by a multiplier. In this multiplier the SIF signal is converted to the intercarrier frequency by mixing it with the regenerated picture carrier from the VCO. The mixer output signal is supplied to the output via a high-pass filter for attenuation of the residual video signals. With this system a high performance hi-fi stereo sound processing can be achieved.

Video switches

The video switch has one input for an external CVBS or Y/C signal. The selected CVBS signal can be supplied to pin 38, the IF video output. The selection between both signals is realised by the controlling software in subaddress 22H.

The video ident circuit is connected to the selected signal. This ident circuit is independent of the synchronisation.

Synchronisation circuit

The IC contains separator circuits for the horizontal and vertical sync pulses and a data-slicing circuit which extracts the digital teletext data from the analogue signal.

The horizontal drive signal is obtained from an internal VCO which is running at a frequency of 25 MHz. This oscillator is stabilised to this frequency by using a 12 MHz signal coming from the reference oscillator of the µ-Controller/Teletext decoder.

The horizontal drive is switched on and off via the soft start/stop procedure. This function is realised by means of variation of the TON of the horizontal drive pulses.

The vertical synchronisation is realised by means of a divider circuit. The vertical ramp generator needs an external resistor and capacitor. For the vertical drive a differential output current is available. The outputs are DC coupled to the vertical output stage.

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Service manual CP-785A

In the TDA936x series, the following geometry parameters can be adjusted for all picture tubes :

• Horizontal shift

• Vertical amplitude

• Vertical slope

• S-correction

• Vertical shift

The types which are intended to be used in combination with 110° picture tubes have an East-West control circuit. The additional controls for these types are:

• EW width

• EW parabola width

• EW upper and lower corner parabola correction

• EW trapezium correction

• Vertical zoom, horizontal parallelogram and bow correction.

Chroma and luminance processing

The chroma band-pass and trap circuits (including the SECAM cloche filter) are realised by means of gyrators and are tuned to the right frequency by comparing the tuning frequency with the reference frequency of the colour decoder. The luminance delay line and the delay cells for the peaking circuit are also realised with gyrators. The circuit contains a black stretcher function which corrects the black level for incoming signals which have a difference between the black level and the blanking level.

Colour decoder

The ICs can decode PAL, NTSC and SECAM signals. The PAL/NTSC decoder does not need external reference crystals but has an internal clock generator which is stabilised to the required frequency by using the 12 MHz clock signal from the reference oscillator of the µ-Controller/Teletext decoder.

The Automatic Colour Limiting (ACL) circuit (switchable via the ACL bit in subaddress 2OH) prevents that oversaturation occurs when signals with a high chroma-to-burst ratio are received. The ACL circuit is designed such that it only reduces the chroma signal and not the burst signal. This has the advantage that the colour sensitivity is not affected by this function.

SOFTWARE CONTROL

The CPU communicates with the peripheral fonctions using Special function Registers (SFRS) which are addressed as RAM locations. The registers for the Teletext decoder appear as normal SFRs in the µ-Controller memory map and are written to these functions by using a serial bus. This bus is controlled by dedicated hardware which uses a simple handshake system for software synchronisation.

For compatibility reasons and possible re-use of software blocks, the TV processor is controlled by I2C bus. The TV processor control registers cannot be read. Only the status registers can be read ( Read address 8A ).

The SECAM decoder contains an auto-calibrating PLL demodulator which has two references, via the divided 12 MHz reference frequency (obtained from the µ-Controller) which is used to tune the PLL to

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Service manual CP-785A

the desired free-running frequency and the bandgap reference to obtain the correct absolute value of the output signal. The VCO of the PLL is calibrated during each vertical blanking period, when the IC is in search or SECAM mode.

The base-band delay line (TDA 4665 function) is integrated. This delay line is also active during NTSC to obtain a good suppression of cross colour effects. The demodulated colour difference signals are internally supplied to the delay line.

RGB output circuit and black-current stabilisation

In the RGB control circuit the signal is controlled on contrast, brightness and saturation. The ICs have a linear input for external RGB signals. The signals for OSD and text are internally supplied to the control circuit. The output signal has an amplitude of about 2 Volts black-to-white at nominal input signals and nominal settings of the various controls.

To obtain an accurate biasing of the picture tube the 'Continuous Cathode Calibration’ system has been included in these ICs. A black level off set can be made with respect to the level which is generated by the black current stabilisation system. In this way different colour temperatures can be obtained for the bright and the dark part of the picture. The black current stabilisation system checks the output level of the 3 channels and indicates whether the black level of the highest output is in a certain window or below or above this window. This indication is read from the status byte 01 and is used for automatic adjustment of the Vg2 voltage during the production of the TV receiver.

During switch-off of the TV receiver a fixed beam current is generated by the black current control circuit. This current ensures that the picture tube capacitance is discharged. During the switch-off period the vertical deflection is placed in an overscan position so that the discharge is not visible on the screen.

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Service manual CP-785A

5-2 IF

The TDA936x has an alignment free IF PLL demodulator. The fully integrated oscillator is automatically calibrated, using the 12 Mhz crystal as a frequency reference. The IF frequency is simply set in TV-Processor by I2C bus. The AFC information is available via I2C bus from the TV-Processor status bytes. The controlling software uses this information for tuner frequency tracking ( automatic following ). The AFC windows is typically 125Khz wide. The minimum frequency step of the tuner is 62.5 Khz. This AFC function is disabled when a program is tuned using the direct frequency entry or after fine tuning adjustment. Therefore it is recommended to tune channel with the TV search function ( manual or Auto setup) or using the direct channel entry to enable the Automatic Frequency Control.

SAW filters

Ref. Standard Features

K3953M B/G - IF filter for video application

- TV IF filter with Nyquist slopes at 38.9 MHz

- Constant group delay

K9650M B/G - IF filter for audio application

- TV IF audio filter with two channels

- Channel ( B/G) with one pass band for sound carriers 33.40 MHz

The SAW filter ( SF1 ) has a double Nyquist slope at 38.9 MHz needed for this multistandard application. The disadvantage of this choice is that a 5.5 MHz trap filter ( Z501 ) is needed to suppress the residual sound carrier in the video for B/G signals.

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Service manual CP-785A

5-3 Source switching

The TDA936x has only one external video input, the external video switching circuit made with Q504, Q505 and Q508 allows 2 external video signal inputs. The switching command can be the µ-Controller pin 8 when the software takes control of the video source. The µ-Controller pin 8 is automatically configured by the controlling software (See table below).

TV mode

-Controller pin 8 Status

RF auto Input - High Impedance < 1V

RF Forced Input - High Impedance not defined

AV 1 Input - High Impedance > 2.0 V

AV 1 Output - Push Pull Max. 3.3V

AV 2 Output - Push Pull < 0.2 V

SVHS Output - Push Pull < 0.2 V

The controlling software via I2C bus selects the signal source :

- Video signal from tuner ( Pin 40 ).

- External video ( SCART 1 or 2 ) depending on Q508 base level.

- External SVHS from SCART 2. The sound source switching is done in the MSP3415D ( I601 ), by the µ-Controller via I2C bus.

Fast R, G, B insertion : The external R, G, B insertion needs a fast switching and cannot be controlled by the software ( instruction cycle of 1µ sec ). The fast switching pin 16 of SCART 1 is directly connected to the TV processor pin 45 ( Fast blanking input ). The display is synchronised with the selected video source, i.e. to get stable R, G, B inserted signal they must be synchronised with the selected video source. The controlling software only enable or disable ( AV2, SVHS, or Forced RF source selected ) fast blanking.

5-4 µ-Controller I/O pin configuration and function The I/O pins of the µ-Controller can be configured in many way. All port functions can be individually

programmed by use of the SFR registers. Each I/O port pin can be individually programmed in these configurations :

Open drain In this mode, the port can function as in and output. It requires an external pull-up resistor. The maximum allowable supply voltage for this pull up resistor is +5V. So in this mode it is possible to interface a 5 Volt environment like I2C while the µ-Controller has a 3.3 Volt supply.

Push-Pull The push pull mode can be used for output only. Both sinking and sourcing is active, which leads to sleep slopes. The levels are 0 and Vddp, the supply voltage 3.3Volts.

Level

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Service manual CP-785A

High impedance This mode can be used for input only operation of the port.

Special port for LED Pin 10 and 11 have the same functionality as the general I/O pins but in addition, their current source and sink capacity is 8 mA instead of 4 mA. These pins are used for driving LED’s via a series current limiting resistor.

µ-Controller I/O pin configuration and function table

pin name configuration description

Stand by TV ON

1 n.u. High impedance High impedance not used 2 SCL Open Drain Open Drain Serial clock line 3 SDA Open Drain Open Drain Serial data line 4 5 OCP High impedance High impedance Over Current Protection

( Switch the set OFF if

the voltage on this pin is

<2.33V ) 6 - High impedance High impedance For factory use only 7 Key in High impedance High impedance Local keyboard input 8 S/SW High impedance See table above external video switch

10 Red LED High impedance Open Drain 11 Green LED Open Drain High impedance 62 Audio mute Push Pull Push Pull High in stand by mode

5-5 Sound processing

Analogue sound IF - input section The input pins ANA_IN1+ and ANA_IN- offer the possibility to connect sound IF sources to the MSP 3415D. The analogue-to-digital conversion of the preselected sound IF signal is done by an A/D converter, whose output is used to control an analogue automatic gain circuit (AGC), providing an optimal level for a wide range of input levels.

Quadrature Mixers The digital input coming from the integrated A/D converter may contain audio information at a frequency range of theoretically 0 to 9 MHz corresponding to the selected standards. By means of two programmable quadrature mixers, two different audio sources ; for example, NICAM and FM-mono, may be shifted into baseband position.

Phase and AM discrimination The filtered sound IF signals are demodulated by means of the phase and amplitude discriminator block. On the output, the phase and amplitude is available for further processing. AM signals are derived from the amplitude information, whereas the phase information serves for FM and NICAM demodulation.

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Service manual CP-785A

In case of NICAM - mode, the phase samples are decoded according the DQPSK - coding scheme. The output of this block contains the original NICAM bitstream.

DSP section All audio baseband functions are performed by digital signal processing (DSP). The DSP section controls the source and output selection, and the signals processing.

Sound Mode switching In case of NICAM transmission, the controlling software read the bit error rate and the operation mode from the NICAM Decoder. When the set is in “Auto detection” mode ( default mode after ATSS ) the controlling software set automatically the sound mode ( NICAM mono, NICAM Dual 1 or NICAM Dual 2 ) depending on the transmitted mode. In case of 2 Carrier FM transmission, the controlling software read the transmission mode and the signal quality level from the Stereo Detection Register. When the set is in “Auto detection” mode the controlling software set automatically the sound mode ( mono, Stereo, Dual 1, Dual 2 ) depending on the transmitted mode. In “Auto detection” mode the controlling software evaluate the signal quality and automatically switch to the analogy sound carrier 1, if the transmission quality is too poor. To avoid unwanted automatic switching the threshold levels mono to stereo and stereo to mono is different. In “forced mono “ mode ( Red OSD in recall section ), the controlling software configure the MSP3415D to demodulate only the analogue (FM or AM) sound carrier 1, no matter the signal quality. The sound mode “ forced “ or “ Autodetect” is stored for each programme.

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Service manual CP-785A

5-6 Sound amplification The TDA8946J is a stereo BTL audio amplifier capable of delivering 2 x 7 W output power to an 8 Ω load at THD = 10%, using a 12 V power supply and an external heatsink. The voltage gain is fixed at 32dB.

With the three-level MODE input the device can be switched from ‘ standby’ to ‘ mute’ and to ‘ operating’ mode. The TDA 8946J outputs are protected by an internal thermal shutdown protection mechanism and short-circuit protection.

Power amplifier The power amplifier is a Bridge Tied Load (BTL) amplifier with an all-NPN output stage, capable of delivering a peak output current of 1.5 A. The BTL principle offers the following advantages :

- Lower peak value of the supply current.

- The ripple frequency on the supply voltage is twice the signal frequency.

- No DC-blocking capacitor

- Good low frequency performance

Mode selection The TDA894xJ has several functional modes, which can be selected by applying the proper DC voltage to pin MODE.

Mute : In this mode the amplifier is DC biased but not operational (no audio output). This allows the input coupling capacitors to be charged to avoid pop-noise. The devices is in mute mode when 2.5 V < V

< (Vcc-1.5 V).

MODE

Operating : In this mode the amplifier is operating normally. The operating mode is activated at V < 0.5 V.

5-7 Vertical deflection The vertical driver circuit is a bridge configuration. The deflection coil is connected between the output amplifiers, which are driven in phase opposition. The differential input circuit is voltage driven. The input circuit is especially intended for direct connection to driver circuits which deliver symmetrical current signals, but is also suitable for asymmetrical currents. The output current of these devices is converted to voltages at the input pins via resistors R350 and R351. The differential input voltage is compared with the output current through the deflection coils measured as voltage across R302, which provides internal feedback information. The voltage across R302 is proportional to the output current. Flyback voltage The flyback voltage is determined by an additional supply voltage V

. The principle of operation with

flb

two supply voltages (class G) makes it possible to fix the supply voltage Vp optimum for the scan voltage and the second supply voltage V high efficiency is achieved. The supply voltage V

optimum for the flyback voltage. Using this method, very

flb

is almost totally available as flyback voltage across

flb

the coil, this being possible due to the absence of a coupling capacitor. Protection The output circuit has protection circuits for :

- Too high die temperature

- overvoltage of output stage A

Guard circuit The guard signal is not used

by the TDA936x to blank the screen in case of fault condition.

Damping resistor

MODE

- 37 -

Service manual CP-785A

For HF loop stability a damping resistor (R305) is connected across the deflection coil.

EAST-WEST Amplifier (TDA8358J only) The East-West amplifier is current driven. It can only sink currents of the diode modulator circuit. A feedback resistor R397 is connected between the input and output of this inverting amplifier in order to convert the East-West correction input into an output voltage.

- 38 -

Service manual CP-785A

R819

D803

D804

Ground

Drain

Vin

5-8 Power supply (STR-F6654)

5-8 -1 STR-F6654 general description

The STR-F6654 is an hybrid IC with a build-in MOSFET and control IC, designed for flyback converter type switch mode power supply applications.

5-8 -2 Power supply primary part operations

An oscillator generates pulses signals which turn on and off a MOSFET transistor.

* Start -up circuit: V

The start-up circuit is used to start and stop the operation of the control IC, by detecting a voltage appearing at V

pin (pin 4).

D801

D802

Main AC voltage

C804

C803

R802

C806

C805

T801 SMPS TRANS

I801 STR-F6653

R805

D805

L801

Power supply start-up circuit

- 39 -

Service manual CP-785A

When the power switch is pushed on, V R802.

As soon as V

reaches 16V, the STR-F6654 control circuit starts operating. Then, VIN is obtained by

smoothing the winding voltage which appears between pin6 and pin7 of the SMPS transformer.

As this winding voltage does not increase to the set voltage immediately after the control circuit starts operating, V

starts dropping. However, as this winding voltage reaches the set value before VIN

voltage drops to the shutdown voltage (at 11V), the control circuit continues operating (see below V voltage at start-up). R805 resistor prevents that V output current.

must be set higher than the shutdown voltage (VIN (off) = 11V

(overvoltage protection) operating voltage (V

= 20.5V

OVP

min

)

Vin

increases slowly. During this time, C806 is charged through

pin voltage varies according to the secondary side

) and lower than the O.V.P.

max

O.V.P.voltage 20.5V

16V (TYP.)

Shutdown voltage 11V

Waveform of Vin pin voltage at start-up

- 40 -

* STR-F665X oscillating operation

Service manual CP-785A

STR-F6653

OSC

Comp.2

Comp.1

Vth(2)

Vth(1)

DRIVE

1.35mA

Oscillating operation

Rg2

Rg1

DRAIN

SOURCE

OCP/FB

GND

TO PIN4 SMPS

R808

From PIN 6 SMPS (FEEDBACK)

C850

R804

(STR-F6653 internal capacitor)

Pin 1

(OCP / FB)

(MOSFET drain current)

(MOSFET drain - source voltage)

MOSFET switching ON/OFF

6.5V

3.7V

0.73V

Waveforms during oscillating operation

ON ON

OFFOFF

OFF

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Service manual CP-785A

¬ When the MOSFET is ON, the STR-F6654 internal capacitor C1 is charged at the constant voltage

6.5V. At the same time, the voltage at pin 1 (OCP / FB) increases with the same waveform as the MOSFET drain current.

- When the pin 1 voltage reaches the threshold voltage V comparator 1 starts operating. The STR-F6654 internal oscillator is inverted and the MOSFET turns OFF.

® When the MOSFET turns OFF, charging of STR-F6654 internal capacitor C1 is released and C1 starts discharging by the STR-F6654 internal resistance R1. So, C1 voltage starts falling in accordance with the gradient regulated by the constant discharging time of C1 and R1. So, this means that the fixed time determined by C1 and R1 is the OFF-time of the MOSFET.

¯ When C1 voltage falls to around 3.7V, the STR-F6654 internal oscillator is reversed again and the MOSFET turns ON. C1 is quickly charged to around 6.5V

The MOSFET continues to oscillate by repeating the above procedure.

* STR-F6654 protection circuits

• overcurrent protection function (OCP)

Overcurrent protection is performed pulse by pulse detecting at STR-F6654 pin 1 (OCP) the peak of the MOSFET drain current in every pulse.

• latch circuit This circuit sustains an output low from the STR-F6654 internal oscillator and stops operation of the power supply when overvoltage protection (OVP) and thermal shutdown (TSD) circuit are under operation

• thermal shutdown circuit (TSD) This circuit triggers the latch circuit when the frame temperature of STR-F6654 IC exceeds 140

• overvoltage protection circuit (OVP) This circuit triggers the latch circuit when the V

voltage exceeds 22V (typ.)

= 0.73V, the STR-F6654 internal

TH1

- 42 -

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

L511

L512

VddA

Reset N

Power

I702

EEPROM

5-9-1 TV start-up operations

* Schematic diagram for start-up operations

I823 REG 3.3V

T801 SMPS TRANSFORMER

GND

2 3

L801

OUT

Service manual CP-785A

RESET

PULSE CIRCUIT

OUT

L510

5661

Vddc

Vddp

I501 MICROCONTROLLER PART

SDA

SCL

D801... D804 (GRAETZ BRIDGE)

SW801 POWER SWITCH

MAIN AC VOLTAGE

D I801 MOSFET AND CONTROL IC

Start-up operations

* TV start-up and microcontroller initialization

- When SW801 power switch is pushed, main AC voltage is applied to T801 transformer (after rectification by D801...D804 diodes). Then, T801 SMPS transformer starts operating and supplies DC voltage to I823 (3.3V regulator).

- This regulator provides 3.3V DC voltage to I501 microcontroller power supply pins (pins 54, 56, 61) and to the reset pulse circuit which provides reset pulse to I501 microcontroller reset pin (pin 60).

- Then, the microcontroller starts its initialization. Its power pin (pin 63) is set to high which allows delivery of power supply voltages (123V, 8V, 5V...). At this step, all IC’s start working but no picture appears on screen: I501 IC doesn’t provide horizontal drive voltage.

- Then, the microcontroller consults I702 EEPROM via I2C bus to know the last TV set mode (normal run mode or stand-by mode ) before switching off.

- 43 -

. If the TV set was on normal run mode before switching off, the microcontroller delivers

3.3V

3.0V

1.2V

DC supply voltage

I823

pin 3

reset pulse

I501

pin 60

from I823

pin 3

R591

220

D591

DZ2.4

R593

10K

R592

10k

Ω

Q510

R594

10K

Q511

C501

50V

horizontal drive voltage at pin 33 and picture appears on screen.

. If the TV set was on stand-by mode before switching off, the microcontroller switches TV

set to stand-by mode, decreasing power pin voltage (pin 63). This matter will be explained on paragraph 5-9-2-b.

* Reset pulse circuit

Service manual CP-785A

Ω

to I501 pin 60

Reset pulse circuit and corresponding waveforms

- 44 -

Service manual CP-785A

I810

CONTROLLED

RECTIFIER

R820

R830

C830

R829

Q808

6V DC

11V DC

R870

D811

Q811

Q809

Q807

Q810

LOW

HIGH

CONDUCTING

POWER

HIGH

NOT

CONDUCTING

* Reset pulse circuit operations description

- When DC supply voltage from I823 regulator starts rising (from 0V to 1.2V), no current flows through D591 zener diode. So, Q510 is in off mode. Also V

=Vcc/2 -Vcc = -Vcc/2 > -0.6V. So, Q511 is in off mode.

be Q511

Then, no voltage reaches I501 pin 60.

- When this voltage reaches 1.2 V, Q510 stays in off mode but V

= -0.6V. So, Q511 is switched on and starts driving DC supply voltage to I501 pin 60.

be Q511

- When the DC supply voltage reaches (2.4V +0.6V ) =3.0V, Q510 starts conducting but as the Q511 base-emitter voltage is the same as the collector-emitter voltage of the saturated Q510, Q511 switches off and no voltage reaches I501 pin 60.

- If the DC supply voltage decreases below 3 V, Q510 switches off immediately. Q511 starts conducting, pulling I501 pin 60 high. At the same time, it discharges the reset capacitor C501. Discharging this capacitor is necessary to garantee a defined reset pulse duration.

5-9-2 TV normal run and stand-by mode operations

Depending on remote control commands, I501 microcontroller part pin 63 (power) is set to:

- high for normal run mode

- low for stand-by mode

a) TV on normal run mode

* I501 microcontroller part pin 63 (power) effect

I501 microcontroller part pin 63 (power) is connected to the following circuit:

I501 microcontroller part pin 63 (POWER) effect

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Service manual CP-785A

Ι822

REGULATOR

On normal run mode, I501 microcontroller pin 63 (power) is set to high

• So, I810 controlled rectifier is not conducting

- Q809 is conducting. So, Q808 is not conducting and Q807 is conducting

- So, Q807 collector is connected to the ground and I810 controlled rectifier gate pin is set to low (no conducting)

• So, current from 11V DC voltage (from T801 SMPS transformer pin 13) does not flow through

Q811 and Q810 transistors but flows through I806 IC error amplifier

- Q809 is conducting. So, Q810 is not conducting and no current flows from Q810 collector to the ground

Therefore, the power supply circuit diagram is the one shown on the next paragraph

* power supply circuit diagram during TV set normal run

I820 5V REGULATOR

1 1

C832

D830

8.5V 8V

D831

11.5V 11V

C861

14.5V (CP785)

12.5V (CP385)

D860

14.5V

12.5V

T801 SMPS TRANSFORMER

C823

D820

16 143V 123V / 113V

3.3V

I823

3.3V REGULATOR

C813

R823

1 I806 IC ERROR AMPLIFIER

R810

11V

143V (CP785)

123V-113V (CP385)

D801... D804

(GRAETZ BRIDGE)

SW801 POWER SWITCH

MAIN AC VOLTAGE

L801

I801 MOSFET AND CONTROL IC

Power supply operation during TV set normal run

- 46 -

11V

Service manual CP-785A

* power supply functioning during TV set normal run mode

- I801 transmits controlled pulses to T801 which generates DC voltages after rectifications by secondary part diodes and electro capacitors (by example by D820 and C813 on 143V supply voltage line).

- 8V, 5V, 3.3V supply voltage lines have stabilized voltages obtained by I820, I822, I823 voltage regulators.

- On 143V supply voltage line, R823 resistor has been chosen to reach exact DC voltage required on this line.

- 143V supply voltage line includes an IC error amplifier (I806) which corrects unexpected DC voltage variations on this line.

* power supply IC delivery during TV set normal run

power supply line IC power supply delivery Remarks

143V

12.5V

FBT

I602 sound amplifier pins 3-16

11V T401 H- drive 8V I501 Main IC pins 14-39 I601 Sound Demod pins 38-39-

6V I703 IR receiver pin 1

I601 Sound Demod pins 7-18-

57 I702 EEPROM pin 8 tuner

3.3V

Main IC µcom part pins 54-56-

b) TV set on stand-by mode

* TV set circuit diagram on stand-by mode

FBT supplies 45V to I301 vertical IC FBT supplies 45V to T401 H- drive FBT supplies 14V to I301 vertical IC FBT supplies 33V to the tuner FBT supplies 185V to I901 video amplifier pin 6

- 47 -

Service manual CP-785A

D801...D804 GRAETZ BRIDGE

SW801 POWER SWITCH

MAIN AC VOLTAGE

T801 SMPS TRANS

L801

DRAIN

I801 MOFSET AND CONTROL IC

OCP FB

I810 controlled rectifier

D821

HIGH

CONDUCTING

C841

C840

AROUND 6Vdc

AROUND

3.3Vdc

I823 3.3V

REGULATOR

D825

R810

R713

R870

I810 CONTROLLED RECTIFIER SWITCHING CIRCUIT

D811

Q811

Q810

HIGH

Q809

I501

MAIN

POWER

LOW

IR IN

com

supply voltage

KEY IN

LOW

61 56

I703 IR

RECEIVER

FRONT

MASK BUTTONS

R888

C888

D806

C808

R806

C850

I804

OPTO COUPLER

CONDUCTING

- 48 -

Power supply operation in stand - by mode

Service manual CP-785A

I810

CONTROLLED

RECTIFIER

R820

R830

C830

R829

Q808

6V DC

Q809

Q807

HIGH

LOW

POWER

LOW

I810 controlled rectifier switching circuit

* TV set stand-by mode operations

-On stand-by mode, I501 microcontroller pin 63 (power) is set to low.

- So, Q809 collector is set to high.

-Then, I810 controlled rectifier gate pin is set to high and I810 is conducting.

- So, current flows from pin 16 SMPS transformer to the ground via I804 optocoupler and Q810 and

Q811 transistors (which are conducting).

- In these conditions, I801 delivers pulses on light mode and T801 produces voltages with reduced

power.

- As I810 is conducting, current flows also from pin 16 SMPS transformer to I823 (3.3V regulator) for I501 µcom, IR receiver and front mask buttons supply voltage (then, remote control or front mask buttons can be activated to leave stand-by mode).

- 49 -

Electrical Parts List

loc part_cd part_nm part_desc remark

0000A 4857028214 HEAT SINK(for I301) AL EX 0000A 4857028215 HEAT SINK(for I602) AL EX 0000A 4857031100 HEAT SINK(for I901) A1050P-H24 T2.0 0000A 4857027609 HEAT SINK(for Q401) AL EX 00010 4850Q00810 BATTERY R6P/LN 00030 4859000160 CABLE SCART S-RCA 3P/DIN 4P(1.2M) A001 4859804393 PCB MAIN 330X246 C101 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C102 CEXF1H470V C ELECTRO 50V RSS 47MF (6.3X11) TP C103 CCZB1H102K C CERA 50V B 1000PF K (AXIAL) C104 CCXB1H102K C CERA 50V B 1000PF K (TAPPING) C106 CEXF1C221V C ELECTRO 16V RSS 220MF (8X11.5) TP C108 CCZB1H101K C CERA 50V B 100PF K (AXIAL) C110 CCZB1H102K C CERA 50V B 1000PF K (AXIAL) C120 CCZB1H102K C CERA 50V B 1000PF K (AXIAL) C121 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C305 CEXF1E471V C ELECTRO 25V RSS 470MF (10X16) TP C313 CMXM2A104J C MYLAR 100V 0.1MF J (TP) C315 CEXF2C470C C ELECTRO 160V RUS 47MF (13X25) TP C320 CBXF1H104Z C CERA SEMI 50V F 0.1MF Z (TAPPING) C350 CCXF1H473Z C CERA 50V F 0.047MF Z (TAPPING) C351 CCXF1H473Z C CERA 50V F 0.047MF Z (TAPPING) C370 CMXM2A473J C MYLAR 100V 0.047MF J (TP) C401 CEXF1H100C C ELECTRO 50V RUS 10MF (5X11) TP

C402 CMYH3C123J C MYLAR 1.6KV BUP 0.012MF J

CMYH3C912J C MYLAR 1.6KV BUP 9100PF J

C404 CMYH3C822J C MYLAR 1.6KV BUP 8200PF J

CMYH3C752J C MYLAR 1.6KV BUP 7500PF J

C408 CMYE2G624J C MYLAR 400V PU 0.62MF J

CMYE2G434J C MYLAR 400V PU 0.43MF J

C412 CEXF2C339C C ELECTRO 160V RUS 3.3MF (8X16) TP C414 CMXM2A104J C MYLAR 100V 0.1MF J (TP) C415 CEXF2E479V C ELECTRO 250V RSS 4.7MF (10X16)TP C418 CCXB1H102K C CERA 50V B 1000PF K (TAPPING) C420 CCXB2H222K C CERA 500V B 2200PF K (TAPPING) C430 CMYH3C122J C MYLAR 1.6KV BUP 1200PF J C431 CMXE2D103J C MYLAR 200V PU 0.01MF J (TP) C440 CMXE2G273J C MYLAR 400V PU 0.027MF J (TP) C499 CEYD1H689W C ELECTRO 50V RHD 6.8MF (16X35.5) C500 CEXF1H478V C ELECTRO 50V RSS 0.47MF (5X11) TP C501 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C502 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C509 CEXF1E470V C ELECTRO 25V RSS 47MF (5X11) TP C511 CMXM2A224J C MYLAR 100V 0.22MF J C512 CMXM2A224J C MYLAR 100V 0.22MF J C513 CBZF1H104Z C CERA SEMI 50V F 0.1MF Z C514 CEXF1E101V C ELECTRO 25V RSS 100MF (6.3X11) TP C515 CBZR1C222M C CERA 16V Y5R 2200PF M (AXIAL) C516 CBZR1C472M C CERA 16V Y5R 4700PF M (AXIAL) C517 CEXF1H109V C ELECTRO 50V RSS 1MF (5X11) TP C518 CBZF1H104Z C CERA SEMI 50V F 0.1MF Z C519 CEXF1H109V C ELECTRO 50V RSS 1MF (5X11) TP C520 CCZB1H102K C CERA 50V B 1000PF K (AXIAL) C521 CCZB1H102K C CERA 50V B 1000PF K (AXIAL) C523 CBZF1H104Z C CERA SEMI 50V F 0.1MF Z C524 CMXL1J104J C MYLAR 63V MEU 0.1MF J C525 CCXB1H102K C CERA 50V B 1000PF K (TAPPING)

- 50 -

29"

25"

29"

25"

29"

25"

loc part_cd part_nm part_desc remark

C526 CMXL1J104J C MYLAR 63V MEU 0.1MF J C527 CMXM2A473J C MYLAR 100V 0.047MF J (TP) C528 CEXF1E101V C ELECTRO 25V RSS 100MF (6.3X11) TP C529 CBZF1H104Z C CERA SEMI 50V F 0.1MF Z C530 CEXF1E101V C ELECTRO 25V RSS 100MF (6.3X11) TP C531 CCXF1H473Z C CERA 50V F 0.047MF Z (TAPPING) C532 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C533 CCZB1H102K C CERA 50V B 1000PF K (AXIAL) C534 CCZF1H223Z C CERA 50V F 0.022MF Z C535 CCZF1H223Z C CERA 50V F 0.022MF Z C536 CCZF1H223Z C CERA 50V F 0.022MF Z C537 CBXF1H104Z C CERA SEMI 50V F 0.1MF Z (TAPPING) C540 CEXF1H220V C ELECTRO 50V RSS 22MF (5X11) TP C541 CEXF1H220V C ELECTRO 50V RSS 22MF (5X11) TP C542 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C543 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C550 CEXF1H229V C ELECTRO 50V RSS 2.2MF (5X11) TP C555 CEXF1C470V C ELECTRO 16V RSS 47MF (5X11) TP C560 CBXF1H104Z C CERA SEMI 50V F 0.1MF Z (TAPPING) C561 CEXF1E101V C ELECTRO 25V RSS 100MF (6.3X11) TP C564 CEXF1E101V C ELECTRO 25V RSS 100MF (6.3X11) TP C565 CBXF1H104Z C CERA SEMI 50V F 0.1MF Z (TAPPING) C577 CCZB1H561K C CERA 50V B 560PF K C585 CCXB1H222K C CERA 50V B 2200PF K (TAPPING) C590 CXCH1H270J C CERA 50V CH 27PF J (TAPPING) C591 CXCH1H270J C CERA 50V CH 27PF J (TAPPING) C592 CBXF1H104Z C CERA SEMI 50V F 0.1MF Z (TAPPING) C593 CEXF1E101V C ELECTRO 25V RSS 100MF (6.3X11) TP C601 CCXB1H472K C CERA 50V B 4700PF K (TAPPING) C602 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C603 CCXB1H472K C CERA 50V B 4700PF K (TAPPING) C604 CEXF1E102V C ELECTRO 25V RSS 1000MF (13X20) TP C605 CEXF1E470V C ELECTRO 25V RSS 47MF (5X11) TP C608 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C610 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C611 CEXF1H339V C ELECTRO 50V RSS 3.3MF (5X11) TP C612 CEXF1H109V C ELECTRO 50V RSS 1MF (5X11) TP C613 CEXF1H109V C ELECTRO 50V RSS 1MF (5X11) TP C614 CEXF1H109V C ELECTRO 50V RSS 1MF (5X11) TP C615 CEXF1H109V C ELECTRO 50V RSS 1MF (5X11) TP C616 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C617 CBXF1H104Z C CERA SEMI 50V F 0.1MF Z (TAPPING) C618 CEXF1C470V C ELECTRO 16V RSS 47MF (5X11) TP C620 CXCH1H509D C CERA 50V CH 5PF D (TAPPING) C621 CXCH1H509D C CERA 50V CH 5PF D (TAPPING) C622 CCXF1H223Z C CERA 50V F 0.022MF Z (TAPPING) C625 CEXF1H479V C ELECTRO 50V RSS 4.7MF (5X11) TP C626 CEXF1H479V C ELECTRO 50V RSS 4.7MF (5X11) TP C629 CBXF1H104Z C CERA SEMI 50V F 0.1MF Z (TAPPING) C630 CEXF1E470V C ELECTRO 25V RSS 47MF (5X11) TP C631 CBXF1H104Z C CERA SEMI 50V F 0.1MF Z (TAPPING) C635 CBXF1H104Z C CERA SEMI 50V F 0.1MF Z (TAPPING) C636 CEXF1H220V C ELECTRO 50V RSS 22MF (5X11) TP C650 CZCH1H470J C CERA 50V CH 47PF J C660 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C661 CMXM2A224J C MYLAR 100V 0.22MF J C662 CMXM2A224J C MYLAR 100V 0.22MF J C665 CCXB1H472K C CERA 50V B 4700PF K (TAPPING) C666 CBXF1H104Z C CERA SEMI 50V F 0.1MF Z (TAPPING)

- 51 -

loc part_cd part_nm part_desc remark

C667 CCXB1H472K C CERA 50V B 4700PF K (TAPPING) C668 CMXM2A224J C MYLAR 100V 0.22MF J C669 CMXM2A224J C MYLAR 100V 0.22MF J C690 CEXF1H479V C ELECTRO 50V RSS 4.7MF (5X11) TP C691 CEXF1H479V C ELECTRO 50V RSS 4.7MF (5X11) TP C698 CZCH1H470J C CERA 50V CH 47PF J C699 CZCH1H470J C CERA 50V CH 47PF J C770 CEXF1E101V C ELECTRO 25V RSS 100MF (6.3X11) TP C771 CBZF1H104Z C CERA SEMI 50V F 0.1MF Z C801 CL1JB3474K C LINE ACROSS AC250V 0.47MF U/C/SNDF/SV C803 CCXB3A472K C CERA 1KV B 4700PF K (TAPPING) C804 CCXB3A472K C CERA 1KV B 4700PF K (TAPPING) C805 CEYN2W151P C ELECTRO 450V LHS 150MF (25X40) C806 CEXF1H330V C ELECTRO 50V RSS 33MF (6.3X11) TP C807 CCXF1H473Z C CERA 50V F 0.047MF Z (TAPPING) C808 CEXF1H479V C ELECTRO 50V RSS 4.7MF (5X11) TP C809 CCZB1H102K C CERA 50V B 1000PF K (AXIAL) C810 CBXB3D102K C CERA SEMI 2KV BL(N) 1000PF K (T) C812 CH1AFE472M C CERA AC 4KV 4700PF M KX DE1610 C813 CEXF2E101V C ELECTRO 250V RSS 100MF 18X35.5 C814 CEXF2E470V C ELECTRO 250V RSS 47MF (16X25) TP C820 CCYR3A471K C CERA 1KV R 470PF K 125 DE0705 C821 CCXB1H102K C CERA 50V B 1000PF K (TAPPING) C823 CEXF1E102V C ELECTRO 25V RSS 1000MF (13X20) TP C824 CCYR3A471K C CERA 1KV R 470PF K 125 DE0705 C824 CCXB3A471K C CERA 1KV B 470PF K (T) C830 CBZF1H104Z C CERA SEMI 50V F 0.1MF Z C831 CCXB3A471K C CERA 1KV B 470PF K (T) C832 CEXF1E102V C ELECTRO 25V RSS 1000MF (13X20) TP C835 CEXF1H470V C ELECTRO 50V RSS 47MF (6.3X11) TP C840 CEXF1C222V C ELECTRO 16V RSS 2200MF (13X25) TP C841 CEXF1C222V C ELECTRO 16V RSS 2200MF (13X25) TP C844 CEXF1E101V C ELECTRO 25V RSS 100MF (6.3X11) TP C850 CCXB1H152K C CERA 50V B 1500PF K (TAPPING) C861 CEXF1E102V C ELECTRO 25V RSS 1000MF (13X20) TP C863 CEXF1E101V C ELECTRO 25V RSS 100MF (6.3X11) TP C866 CCXB3A471K C CERA 1KV B 470PF K (T) C888 CEXF1C470V C ELECTRO 16V RSS 47MF (5X11) TP C905 CEXF2E479V C ELECTRO 250V RSS 4.7MF (10X16)TP C906 CEXF2E100V C ELECTRO 250V RSS 10MF (10X20) TP C910 CCXB1H561K C CERA 50V B 560PF K (TAPPING) C950 CEXF1H220V C ELECTRO 50V RSS 22MF (5X11) TP C965 CBXB3D102K C CERA SEMI 2KV BL(N) 1000PF K (T) C968 CMXL2E104K C MYLAR 250V MEU 0.1MF K D100 DSD50RH51B LED SD50-RH51BGRW D100M 4853533600 HOLDER LED P.P BK D101 D1N4148--- DIODE 1N4148 (TAPPING) D102 D1SS85TA-- DIODE 1SS85TA D313 DRGP15J--- DIODE RGP15J D360 DMTZJ22D-- DIODE ZENER MTZJ 22D D361 DUZ33B---- DIODE ZENER UZ-33B D367 DUZ33B---- DIODE ZENER UZ-33B D381 DUZ33B---- DIODE ZENER UZ-33B D403 DDG3------ DIODE DG3 D404 DRGP30J--- DIODE RGP30J D405 DRGP15J--- DIODE RGP15J D407 DRGP15J--- DIODE RGP15J D408 DRGP15J--- DIODE RGP15J D410 D1N4004S-- DIODE 1N4004S

- 52 -

loc part_cd part_nm part_desc remark

D411 D1N4004S-- DIODE 1N4004S D414 D1N4004S-- DIODE 1N4004S D450 DRGP15J--- DIODE RGP15J D520 D1N4148--- DIODE 1N4148 (TAPPING) D521 D1N4148--- DIODE 1N4148 (TAPPING) D591 DUZ2R4B--- DIODE ZENER UZ-2.4B D601 D1N4148--- DIODE 1N4148 (TAPPING) D602 D1N4148--- DIODE 1N4148 (TAPPING) D710 DMTZJ5R1A- DIODE ZENER MTZJ 5.1A D801 DLT2A05G-- DIODE LT2A05G (TP) D802 DLT2A05G-- DIODE LT2A05G (TP) D803 DLT2A05G-- DIODE LT2A05G (TP) D804 DLT2A05G-- DIODE LT2A05G (TP) D805 DRGP15J--- DIODE RGP15J D806 DRGP15J--- DIODE RGP15J D808 DRGP15J--- DIODE RGP15J D809 DRGP15J--- DIODE RGP15J D810 DRGP15J--- DIODE RGP15J D811 DMTZJ5R6B- DIODE ZENER MTZJ 5.6B D820 DRGP30J--- DIODE RGP30J D821 DRGP15J--- DIODE RGP15J D822 DMTZJ9R1C- DIODE ZENER MTZJ 9.1C D824 D1N4148--- DIODE 1N4148 (TAPPING) D825 D1N4148--- DIODE 1N4148 (TAPPING) D830 DRGP15J--- DIODE RGP15J D831 DRGP15J--- DIODE RGP15J D840 D1N4148--- DIODE 1N4148 (TAPPING) D841 D1N4148--- DIODE 1N4148 (TAPPING) D860 DRGP30J--- DIODE RGP30J D904 D1N4004S-- DIODE 1N4004S D905 D1N4004S-- DIODE 1N4004S D906 D1N4004S-- DIODE 1N4004S D907 D1N4937G-- DIODE 1N4937G (TAPPING) D951 D1N4148--- DIODE 1N4148 (TAPPING) D952 D1N4148--- DIODE 1N4148 (TAPPING) D953 D1N4148--- DIODE 1N4148 (TAPPING) D954 D1N4148--- DIODE 1N4148 (TAPPING) DA02 DMTZJ5R6B- DIODE ZENER MTZJ 5.6B DA04 DMTZJ5R6B- DIODE ZENER MTZJ 5.6B DA11 DMTZJ5R6B- DIODE ZENER MTZJ 5.6B DA15 DMTZJ5R6B- DIODE ZENER MTZJ 5.6B DA16 DMTZJ5R6B- DIODE ZENER MTZJ 5.6B DA20 DMTZJ5R6B- DIODE ZENER MTZJ 5.6B F801 5FSGB4022L FUSE GLASS TUBE SEMKO TL 4A 250V MF51 F801A 4857415001 CLIP FUSE PFC5000-0702 F801B 4857415001 CLIP FUSE PFC5000-0702 G900 4SG0D00103 SPARK GAP S-23 900V-1.5KV G901 4SG0D00103 SPARK GAP S-23 900V-1.5KV G902 4SG0D00103 SPARK GAP S-23 900V-1.5KV G903 4SG0D00103 SPARK GAP S-23 900V-1.5KV HP01 4859102130 JACK EARPHONE YSC-1537 I301 1TDA8358J- IC VERTICAL TDA8358J I501 1TDA9365L- IC MICOM OTP TDA9365TS/N1/5L I601 1MSP3415D- IC AUDIO MSP3415D I602 1TDA8946J- IC AUDIO TDA8946J I702 1AT24C08PC IC AT24C08-10PC I703 1TS0P1238W IC PREAMP TS0P1238WI1 I801 1STRF6654- IC SMPS STR-F6654 I801A 4857027910 HEAT SINK AL EX

- 53 -

! ! ! !

loc part_cd part_nm part_desc remark

I804 1KP1010C-- IC PHOTO COUPLER KP-1010C I805 1UPC574J-- IC UPC574J I806 1SE130N--- IC SE130N I810 TX0202DA-- THYRISTOR X0202DA1BA2 I820 1KA7805--- IC REGULATOR KA7805 I822 1KA7808--- IC REGULATOR KA7808 I823 1LP295033- IC REGULATOR LP2950 3.3V I901 1TDA6107Q- IC VIDEO TDA6107Q JPA1 4859110050 JACK PIN BOARD PH-JB-9614D JPA2 4859200401 SOCKET RGB YRS21-R1 JPA3 4859108450 JACK PIN BOARD YSC03P-4120-14A L101 5CPZ100K02 COIL PEAKING 10UH K (AXIAL 3.5MM) L350 5CPZ109M04 COIL PEAKING 1UH 10.5MM M (LAL04TB) L381 5CPZ109M04 COIL PEAKING 1UH 10.5MM M (LAL04TB)

L401 58H0000065 COIL H-LINEARITY TRL-140D

58H0000025 COIL H-LINEARITY TRL-330

L402 58C7070085 COIL CHOKE TLN-3062A L500 5CPZ120K02 COIL PEAKING 12UH K (AXIAL 3.5MM) L501 5CPZ100K02 COIL PEAKING 10UH K (AXIAL 3.5MM) L502 5CPZ100K02 COIL PEAKING 10UH K (AXIAL 3.5MM) L510 5CPZ100K02 COIL PEAKING 10UH K (AXIAL 3.5MM) L511 5CPZ100K02 COIL PEAKING 10UH K (AXIAL 3.5MM) L512 5CPZ100K02 COIL PEAKING 10UH K (AXIAL 3.5MM) L601 5CPZ479K02 COIL PEAKING 4.7UH K (AXIAL 3.5MM) L602 5CPZ479K02 COIL PEAKING 4.7UH K (AXIAL 3.5MM) L603 5CPZ479K02 COIL PEAKING 4.7UH K (AXIAL 3.5MM) L650 5MC0000100 COIL BEAD HC-3550 L801 5MC0000100 COIL BEAD HC-3550 L802 58C9430599 COIL CHOKE AZ-9004Y(94MH) L803 5MC0000100 COIL BEAD HC-3550 LF801 5PLF24A1-- FILTER LINE LF-24A1 P401 4850705N14 CONNECTOR BIC-05T-25T+ULW=500 P402 4859240120 CONN WAFER YFW500-06 P501 4850705N14 CONNECTOR BIC-05T-25T+ULW=500 P601 485923172S CONN WAFER YW025-04 (STICK) P601A 4850704S32 CONNECTOR YH025-04+35098+ULW=900 P903 4859238620 CONN WAFER YPW500-02 PW000 4859904111 CORD POWER KKP-560A KLCE-2F 2600MM PWC1 PTWASW301 Q101 TKTC3198Y- TR KTC3198Y Q103 TKTC3202Y- TR KTC3202Y (TP) Q401 T2SD2553-- TR 2SD2553 Q402 TKTC3209Y- TR KTC3209Y Q501 TKTA1266Y- TR KTA1266Y (TP) Q502 TKTC3198Y- TR KTC3198Y Q503 TKTC3198Y- TR KTC3198Y Q504 TKTC3198Y- TR KTC3198Y Q505 TKTC3198Y- TR KTC3198Y Q508 TKTC3198Y- TR KTC3198Y Q510 TKTA1266Y- TR KTA1266Y (TP) Q511 TKTA1266Y- TR KTA1266Y (TP) Q601 TKTA1266Y- TR KTA1266Y (TP) Q807 TKTC3198Y- TR KTC3198Y Q808 TKTC3198Y- TR KTC3198Y Q809 TKTC3198Y- TR KTC3198Y Q810 TKTC3198Y- TR KTC3198Y Q811 TKTC3198Y- TR KTC3198Y Q950 TKTC3198Y- TR KTC3198Y R101 RD-AZ473J- R CARBON FILM 1/6 47K OHM J

CORD POWER ASS`Y 4859904111+ HOUSING

- 54 -

29"

25"

! !

loc part_cd part_nm part_desc remark

R102 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R103 RD-AZ123J- R CARBON FILM 1/6 12K OHM J R104 RD-AZ104J- R CARBON FILM 1/6 100K OHM J R105 RD-AZ392J- R CARBON FILM 1/6 3.9K OHM J R106 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R107 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R113 RD-AZ562J- R CARBON FILM 1/6 5.6K OHM J R114 RD-AZ562J- R CARBON FILM 1/6 5.6K OHM J R115 RD-AZ682J- R CARBON FILM 1/6 6.8K OHM J R116 RD-AZ222J- R CARBON FILM 1/6 2.2K OHM J R117 RD-AZ222J- R CARBON FILM 1/6 2.2K OHM J R120 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R310 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R311 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R331 RS01Z201J- R M-OXIDE FILM 1W 200 OHM J (TAPPING) R340 RD-4Z473J- R CARBON FILM 1/4 47K OHM J

R350 RN-4Z1501F R METAL FILM 1/4 1.50K OHM F

RN-4Z1801F R METAL FILM 1/4 1.80K OHM F

R351 RN-4Z1501F R METAL FILM 1/4 1.50K OHM F

RN-4Z1801F R METAL FILM 1/4 1.80K OHM F

R370 RD-4Z159J- R CARBON FILM 1/4 1.5 OHM J R394 RD-AZ272J- R CARBON FILM 1/6 2.7K OHM J R395 RD-4Z394J- R CARBON FILM 1/4 390K OHM J R396 RD-AZ272J- R CARBON FILM 1/6 2.7K OHM J R397 RD-AZ823J- R CARBON FILM 1/6 82K OHM J R398 RF01Z828JA R FUSIBLE 1W 0.82 OHM J A CURVE R399 RS02Z120JS R M-OXIDE FILM 2W 12 OHM J SMALL R401 RD-4Z272J- R CARBON FILM 1/4 2.7K OHM J R402 RD-4Z220J- R CARBON FILM 1/4 22 OHM J R404 RD-4Z399J- R CARBON FILM 1/4 3.9 OHM J R406 RS02Z821JS R M-OXIDE FILM 2W 820 OHM J SMALL R415 RS02Z102JS R M-OXIDE FILM 2W 1K OHM J SMALL R420 RD-AZ223J- R CARBON FILM 1/6 22K OHM J R427 RS01Z101J- R M-OXIDE FILM 1W 100 OHM J (TAPPING) R450 RS02Z223JS R M-OXIDE FILM 2W 22K OHM J SMALL R501 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R502 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R503 RD-AZ332J- R CARBON FILM 1/6 3.3K OHM J R504 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R505 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R506 RD-AZ332J- R CARBON FILM 1/6 3.3K OHM J R507 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R508 RD-AZ332J- R CARBON FILM 1/6 3.3K OHM J R509 RD-AZ681J- R CARBON FILM 1/6 680 OHM J R512 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R513 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R514 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R515 RD-AZ153J- R CARBON FILM 1/6 15K OHM J R516 RD-AZ393J- R CARBON FILM 1/6 39K OHM J R517 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R518 RD-AZ273J- R CARBON FILM 1/6 27K OHM J R520 RD-AZ333J- R CARBON FILM 1/6 33K OHM J R521 RD-AZ391J- R CARBON FILM 1/6 390 OHM J R522 RD-AZ221J- R CARBON FILM 1/6 220 OHM J R523 RD-AZ331J- R CARBON FILM 1/6 330 OHM J R524 RD-AZ561J- R CARBON FILM 1/6 560 OHM J R525 RD-AZ104J- R CARBON FILM 1/6 100K OHM J R526 RD-AZ479J- R CARBON FILM 1/6 4.7 OHM J R527 RD-AZ431J- R CARBON FILM 1/6 430 OHM J

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loc part_cd part_nm part_desc remark

R528 RD-AZ221J- R CARBON FILM 1/6 220 OHM J R530 RD-AZ470J- R CARBON FILM 1/6 47 OHM J R531 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R533 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R537 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R538 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R539 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R540 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R541 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R543 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R545 RD-AZ682J- R CARBON FILM 1/6 6.8K OHM J R547 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R548 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R549 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R550 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R555 RD-AZ103J- R CARBON FILM 1/6 10K OHM J

R556 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J

RD-AZ512J- R CARBON FILM 1/6 5.1K OHM J

R567 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R570 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R580 RD-AZ561J- R CARBON FILM 1/6 560 OHM J R585 RD-AZ224J- R CARBON FILM 1/6 220K OHM J R586 RD-AZ221J- R CARBON FILM 1/6 220 OHM J R587 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING R588 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING R589 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING R591 RD-AZ221J- R CARBON FILM 1/6 220 OHM J R592 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R593 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R594 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R595 RD-AZ473J- R CARBON FILM 1/6 47K OHM J R597 RN-4Z1502F R METAL FILM 1/4 15K OHM F R598 RN-4Z1502F R METAL FILM 1/4 15K OHM F R599 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R605 RD-AZ751J- R CARBON FILM 1/6 750 OHM J R606 RD-AZ751J- R CARBON FILM 1/6 750 OHM J R608 RD-2Z151J- R CARBON FILM 1/2 150 OHM J R609 RD-2Z151J- R CARBON FILM 1/2 150 OHM J R610 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R611 RD-AZ104J- R CARBON FILM 1/6 100K OHM J R614 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R615 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R620 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R621 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R622 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R650 RD-AZ822J- R CARBON FILM 1/6 8.2K OHM J R660 RD-AZ822J- R CARBON FILM 1/6 8.2K OHM J R661 RD-AZ752J- R CARBON FILM 1/6 7.5K OHM J R662 RD-AZ752J- R CARBON FILM 1/6 7.5K OHM J R700 RD-2Z332J- R CARBON FILM 1/2 3.3K OHM J R710 RD-AZ431J- R CARBON FILM 1/6 430 OHM J R711 RD-AZ431J- R CARBON FILM 1/6 430 OHM J R713 RD-AZ681J- R CARBON FILM 1/6 680 OHM J R720 RD-AZ122J- R CARBON FILM 1/6 1.2K OHM J R721 RD-AZ181J- R CARBON FILM 1/6 180 OHM J R722 RD-AZ221J- R CARBON FILM 1/6 220 OHM J R723 RD-AZ331J- R CARBON FILM 1/6 330 OHM J R724 RD-AZ471J- R CARBON FILM 1/6 470 OHM J R801 DDC7R0M290 POSISTOR ECPCD7R0M290

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R802 RS02Z753JS R M-OXIDE FILM 2W 75K OHM J SMALL R803 RS02Z473JS R M-OXIDE FILM 2W 47K OHM J SMALL R804 RF02Z158K- R FUSIBLE 2W 0.15 OHM K (TAPPING) R805 RD-2Z100J- R CARBON FILM 1/2 10 OHM J R806 RD-4Z472J- R CARBON FILM 1/4 4.7K OHM J R807 RD-2Z272J- R CARBON FILM 1/2 2.7K OHM J

R808 RS02Z911JS R M-OXIDE FILM 2W 910 OHM J SMALL

RS02Z102JS R M-OXIDE FILM 2W 1K OHM J SMALL

R810 RD-4Z102J- R CARBON FILM 1/4 1K OHM J R811 RC-2Z565KP R CARBON COMP 1/2 5.6M OHM K R817 RD-AZ473J- R CARBON FILM 1/6 47K OHM J R819 RX10B339JN R CEMENT 10W 3.3 OHM J BENCH 4P R820 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R821 RD-4Z102J- R CARBON FILM 1/4 1K OHM J R823 RD-4Z512J- R CARBON FILM 1/4 5.1K OHM J R829 RD-AZ223J- R CARBON FILM 1/6 22K OHM J R830 RD-AZ332J- R CARBON FILM 1/6 3.3K OHM J R840 RD-4Z220J- R CARBON FILM 1/4 22 OHM J R841 RD-2Z479J- R CARBON FILM 1/2 4.7 OHM J R850 RD-2Z479J- R CARBON FILM 1/2 4.7 OHM J R855 RD-4Z185J- R CARBON FILM 1/4 1.8M OHM J R870 RD-2Z222J- R CARBON FILM 1/2 2.2K OHM J R888 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R910 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R911 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R912 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R913 RC-2Z102K- R CARBON COMP 1/2 1K OHM K R914 RC-2Z102K- R CARBON COMP 1/2 1K OHM K R915 RC-2Z102K- R CARBON COMP 1/2 1K OHM K

R920 RS01Z569J- R M-OXIDE FILM 1W 5.6 OHM J (TAPPING)

RS01Z249J- R M-OXIDE FILM 1W 2.4 OHM J (TAPPING)

R921 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R922 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R923 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R924 RD-4Z105J- R CARBON FILM 1/4 1M OHM J R925 RD-4Z102J- R CARBON FILM 1/4 1K OHM J R951 RD-4Z244J- R CARBON FILM 1/4 240K OHM J R952 RD-4Z123J- R CARBON FILM 1/4 12K OHM J R953 RD-AZ153J- R CARBON FILM 1/6 15K OHM J R954 RD-AZ223J- R CARBON FILM 1/6 22K OHM J R955 RD-AZ223J- R CARBON FILM 1/6 22K OHM J RA01 RD-AZ680J- R CARBON FILM 1/6 68 OHM J RA11 RD-AZ680J- R CARBON FILM 1/6 68 OHM J RA12 RD-AZ680J- R CARBON FILM 1/6 68 OHM J RA16 RD-AZ680J- R CARBON FILM 1/6 68 OHM J RA20 RD-AZ473J- R CARBON FILM 1/6 47K OHM J RA21 RD-AZ473J- R CARBON FILM 1/6 47K OHM J RA40 RD-AZ102J- R CARBON FILM 1/6 1K OHM J RA41 RD-AZ102J- R CARBON FILM 1/6 1K OHM J SCT1 4859303530 SOCKET CRT PCS629-03C SD8 4856814900 CLAMP WIRE NYLON 66 SF01 5PK3953M-- FILTER SAW K3953M SF02 5PK9650M-- FILTER SAW K9650M SP01 4858310810 SPEAKER F2250C-2141 SP02 4858310810 SPEAKER F2250C-2141 SW700 5S50101090 SW TACT THVH472GCA SW701 5S50101090 SW TACT THVH472GCA SW702 5S50101090 SW TACT THVH472GCA SW703 5S50101090 SW TACT THVH472GCA

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loc part_cd part_nm part_desc remark

SW704 5S50101090 SW TACT THVH472GCA SW801 5S40101143 SW POWER PUSH PS3-22SP (P.C.B) T401 50D19A1--- TRANS DRIVE TD-19A1 T402 50H0000181 FBT 1352.5008E T801 50M4950A8- TRANS SMPS TSM-4950A8 U100 4859719930 TUNER VARACTOR DT5-BF18D

V901 4859629663 CRT A68KTB259X010 M50

4859629569 CRT A59KPR84X02(D) M50

X502 5XE12R000E CRYSTAL QUARTZ HC-49/U 12.00000MHZ 30PPM X601 5XE18R432E CRYSTAL QUARTZ HC-49/U 18.43200MHZ 30PPM Z501 5PYXT5R5MB FILTER CERA XT 5.5MB ZZ100 48B4744N08 TRANSMITTER REMOCO R-44N08 (AA)

ZZ120 PTBCSHD393 COVER BACK AS DTE-29G5TH

PTBCSHD392 COVER BACK AS DTE-25G5THS

ZZ131 48519A4210 CRT GROUND NET 2901H-1015-2P

48519A4010 CRT GROUND NET 2501H-1015-2P

ZZ132 58G0000145 COIL DEGAUSSING DC-29S2

58G0000144 COIL DEGAUSSING DC-25S2

ZZ200 PTFMSJD393 MASK FRONT AS DTE-29G5TH

PTFMSJD392 MASK FRONT AS DTE-25G5THS

ZZ290 PTMPMSD393 PCB MAIN MANUAL AS DTE-29G5TH

PTMPMSD392 PCB MAIN MANUAL AS DTE-25G5THS

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DAEWOO ELECTRONICS CO., LTD

686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX : DWELEC K28177-8 CABLE : “DAEWOOELEC” E-mail : djkoo@web.dwe.co.kr

PRINTED DATE : DEC. 1999

Daewoo CP-785A Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual