NEC FS-59T90 Schematic

September, 2002

NEC Corporation

Service manual

59/68 Cm STEREO Color Television

MODEL : DTE-25G5THS DTE-29G5TH FS-59T90 FS-68T90 DTE-25G4ZH DTE-29G4ZH FS-59V81 FS-68V81

CHASSIS : CP-785A

S/M No. : TCP785AEFR1

Contents

1 - Main features

1-1 Specifications

1-2 External Terminals

1-3 Channel table

2 - Safety instruction

3 - Alignment instructions

3-1 Microcontroller configuration : Service mode

3-2 Microcnotroller configuration : Option

3-3 TV set Alignment

4 - IC description

4-1 TDA936x TV signal processor - TXT with embedded

-Controller 12

4-2 MSP34 Multistandard Sound Processor

4-3 TDA894x J Stereo Audio Amplifier

4-4 TDA835x J Vertical Amplifier

4-5 TDA6107Q

4-6 24C08 8 K bit EEPROM

4-7 STR-F665X

5 - Circuit description

5-1 Block diagram

5-2 IF

5-3 Source switching

5-4

-Controller I/O pin configuration and function 35

5-5 Sound processing

5-6 Sound amplification

5-7 Vertical deflection

5-8 Power supply (STR-F6654)

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

6 - Service parts list

6-1 PCB Difference Part (PCB change of FS-xxT90)

6-2 CRT Difference Part

6-3 Function & Cabinet Difference Part

6-4 All Electrical Parts List

7 - Compaitible Components List for FS-xxT90, xxV81

8 - Exploded view 83

9 - PCB Layout

9-1 Old Main PCB (4859804393)

9-2 New Main PCB (4859806493)

9-3 Control PCB (4859833214)

10 - Circuit Diagram

88 10-1 Old Main PCB 88 10-2 New Main PCB & Control PCB

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Service Manual CP-785A

1-1 Specifications

1-2 External Teminals

1-2-1 Input 2 : Rear RCA

TV standard PAL, - B/G, H Sound system NICAM B/G

FM 2Carrier B/G

Power consumption 25” : 113W approx.

29” : 118W approx.

Sound Output Power 25” : 5W x 5W (at 60% mod, 10% THD)

29” : 5W x 5W (at 60% mod, 10% THD)

Speaker 25” : 7W 8 ohm x 2

29” : 7W 8 ohm x 2 Teletext system 10 pages memory FASTEXT (FLOF or TOP) : Option Aerial input 75 ohm unbalanced Channel coverage Off-air channels, S-cable channels and hyperband Tuning system frequency synthesiser tuning system Visual screen size 25” : 59 Cm

29” : 68 Cm Channel indicatio On Screen Display Program Selection 100 programmes Aux. terminal INPUT1(SCART or RCA)

- SCART : Audio / Video In, S-VHS In(with cable)

- RCA : Audio / Video In. (SVHS : disable) INPUT2(RCA) : Audio / Video In OUTPUT(RCA) : TV OUT Headphone jack (3.5 mm) on front of cabinet

Remote Control Unit R-44N08(RD-D90) for with Teletext

R-44N09(RD-085) for with Teletext

Pin Signal Matching value 1(Yellow) Video Input 1.0 Vpp+/- 3dB, Impedance 75 ohm 2(White) Audio Input Left 0.5 Vrms, Impedance > 10k ohm 3(Red) Audio Input Right 0.5 Vrms, Impedance > 10k ohm

1-2-2 Output : Rear RCA

Pin Signal Matching value 1(Yellow) TV Video 1.0 Vpp+/- 3dB, Impedance 75 ohm 2(White) TV Audio Left 0.5 Vrms at RF Sound FM 54%Mod.(27kHz dev.) 3(Red) TV Audio Right 0.5 Vrms at RF Sound FM 54%Mod.(27kHz dev.)

1-2-3 Input1 : Rear RCA or Scart

-RCA Jack : Input1 (S-VHS not available)

Pin Signal Matching value 1(Yellow) Video Input 1.0 Vpp+/- 3dB, Impedance 75 ohm 2(White) Audio Input Left 0.5 Vrms, Impedance > 10k ohm 3(Red) Audio Input Right 0.5 Vrms, Impedance > 10k ohm

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Service Manual CP-785A

- SCART (21pin Euro Scart) : Input1 & S-VHS input

Pin Signal Matching value

1 N.C. 2 Audio Input Right 0.5 Vrms, Impedance > 10 kΩ 3 N.C. 4 Audio Earth 5 Earth 6 Audio Input Left 0.5 Vrms, Impedance > 10 kΩ 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 +/- 3dB for a luminance signal of 1 Vpp 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

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Service Manual CP-785A

1-3 Channel table

FREQUENCY TABLE CP-785A

CH AUSTRALIA N/Z˅land

C00 46.25 C01 57.25 C02 64.25 C03 86.25 C04 95.25 C05 102.25

C5A 138.25

C06 175.25 C07 182.25 C08 189.25 C09 196.25 C10 209.25 C11 216.75 N01 - 45.25 N02 - 55.25 N03 - 62.25 N08 - 203.25 N09 - 210.25 N10 - 217.25

- - C21 471.25 C22 479.25 C23 487.25 C24 495.25 C25 503.25 C26 511.25 C27 519.25 C28 527.25 C29 534.25 C30 541.25 C31 548.25 C32 555.25 C33 562.25 C34 569.25 C35 576.25 C36 583.25 C37 590.25 C38 597.25 C39 603.25 C40 610.25 C41 617.25 C42 624.25

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Service Manual CP-785A

CH AUSTRALIA N/Z˅land

C43 631.25 C44 638.25 C45 645.25 C46 652.25 C47 659.25 C48 666.25 C49 673.25 C50 680.25 C51 687.25 C52 694.25 C53 701.25 C54 708.25 C55 715.25 C56 722.25 C57 729.25 C58 736.25 C59 743.25 C60 750.25 C61 757.25 C62 764.25 C63 771.25 C64 779.25 C65 786.25 C66 793.25 C67 800.25 C68 807.25 C69 814.25 C70 C71 C72 C73 C74 C75 C76 C77 S01 105.25 S02 112.25 S03 119.25 S04 126.25 S05 133.25 S06 140.25 S07 147.25 S08 154.25 S09 161.25 S10 168.25

S11 231.25

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Service Manual CP-785A

CH AUSTRALIA N/Z˅land

S12 238.25 S13 245.25 S14 252.25 S15 259.25 S16 266.25 S17 273.25 S18 280.25 S19 287.25 S20 294.25 S21 303.25 S22 311.25 S23 319.25 S24 327.25 S25 335.25 S26 343.25 S27 351.25 S28 359.25 S29 367.25 S30 375.25 S31 383.25 S32 391.25 S33 399.25 S34 407.25 S35 415.25 S36 423.25 S37 431.25 S38 439.25 S39 447.25 S40 455.25 S41 463.25

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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

Section Items BareDATA

REMARK

G5TH G4ZH G5THS G4ZH

AGC 32 38 38 38 38 38

BIAS R/G 31/31 31/31 31/31 31/31 31/31 31/31 old micom : 8/8

DRIVE R/G/B 32/32/32 32/32/28 32/32/28 32/32/32 32/32/32 32/32/32

H-PARALLEL 31 36 36 32 32 32

H-BOW 42 34 34 35 35 35

For H-SHIFT 25 30 30 30 30 27

Adjustment V-SLOPE 32 35 35 35 35 35

(Variable) V-Amplitude 39 19 19 30 30 27

V. S-Correction 13 27 27 25 25 23

V SHIFT 32 34 34 34 34 45

H-WIDTH 32 37 37 57 57 33

EW Parabola 32 20 20 17 17 0

Up-Conner 32 32 32 42 42 32 Dn-Conner 32 32 32 42 42 32

EW Trapezium 32 29 29 31 31 29

Option 04 04 04 04 04 04

0,1,2,3 : For D/W Remote controller 4,5,6,7 : For NEC Remote controller

CH Lock

or OFF OFF OFF OFF OFF OFF “Hotel Lock” will be changed to “CH Lock”

HOTEL Lock

HOTEL Max Vol

For or 15 43 43 43 43 43 “

Hotel Max Vol” will be changed to “Max Vol”

Function Max VOL

Change

Colck Pr. 01 07 07 07 07 07

change the reference channel

(OPTION) for Automatic clock setting

SVHS ON ON OFF ON OFF OFF OFF : disable S-VHS Input AV START OFF OFF OFF OFF OFF OFF “AV START” is add KEY LOCK OFF OFF OFF OFF OFF OFF “KEY LOCK” is add

SCREEN 24 31 31 33 33 35 each CRT has different Adjusting point

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Service Manual CP-785A

Lock Function Name Description

Applied CPU

Remark

Models Version

- Channel Setting : Enable / Disable

Current - Volume Limit (Hotel Max Vol) : Enable / Disable FS-59T90 These current Lock fuction

Lock - When this function is active, It is impossible to change FS-68T90 DW9365-CH1 will be change to New Lock Fuction.

Function Hotel Lock ON / OFF the channel data (can not enter the INSTALL menu) & PF51T31

the sound can be limited by

Hotel Max Vol

- This Function is available When

Hotel Lock

is on

Hotel (This function is depend on Hotel Lock Function)

Max. Volume 00 ~ 43(max.) - When Hotel Lock is off , the sound dose not limited.

- Channel Setting : Impossible / Possible - Each Lock Function is independence

CH Lock ON / OFF - The former

Hotel mode

has been removed and added

CH lock

- It is possible to change the features by

- When this function is active, It is impossible to change combination of each function

New the channel data (can not enter the INSTALL menu) FS-59V81 - We will apply these new lock fuction to

Lock - Max Volume is limited. FS-68V81 current TEXT micom.

Function - Even if

CH lock

is not active the sound can be DW9365-CH2

Max Vol 00 ~ 43(max.) limited by the service function

Max Vol

. (FS-59T90) DW9385-CH1 - Examlpe)

- In case of virgin EEPROM, the default setting is 43 (Max). (FS-68T90) CH lock=ON, Max Vol=20

- In normal, the

Max. Vol.

must be 43 (PF51T31) ==> CH setting = Disable

- When

VA start

is active, the set always start in AV1 mode Volume Limit : under 20

AV Start ON / OFF (main AC switch on/off & remote controller on/off). Max. Vol=20, AV start=ON, Key Lock=ON

- In case of virgin EEPROM, the default setting is OFF. ==> Volume Limit : under 20

Key Lock ON / OFF - When active the local keyboard cannot be used. Tv is always turn on at AV1 mode

- In case of virgin EEPROM, the default setting is OFF. Front local keys are not operate

Change of Lock Function

(1) Model

- New AV Stereo Model (FS-xxV81, DTE-xxG4ZH) will be applied the new lock function from 1st MP.

- Current Model (FS-xxT90, DTE-xxG5THx) will be changed to new lock function when the CPU software is changed (TDA9365 : DW9365-CH1 ==> DW9365-CH2)

(2) Details

* Note : These Function is changed only Service Mode not Factory mode. So you must use the user

s remote controller

- Change the PR. No. to 91 ==> change the sharpness to 00(min) in Picture control Menu ==> Exit the User control Menu ==> Press the [RED],[GREEN],[MENU] quickly

- Then the Service Menu is appeared.

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Service Manual CP-785A

3-3 TV set Alignment

3-3-1 - G2 alignment

- 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 32.

- Set TV in NORMAL I mode

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

5V.

Screen size Vcut-off

25” 140V 29” 140V

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.

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 EW.Parabola

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Service Manual CP-785A

3-3-7 - AGC

- Adjust the antenna signal level at 68 dBV 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

H. Bow

H.Width

Up Corner

Dw Corner

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Service Manual CP-785A

4 - IC description

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

- TDA936x : TEXT Available

- TDA938x : TEXT Not Available

CHASSIS(MODELS) IC MARKING TEXT TV STANDARD Version History

CP-785A, AF TDA9365 10 PAGE TEXT TDA-9365/N1(otp)

(DTE-xxxxTHx) (DW9365/N2-CH1) (Pan-Eur opeun) PLA/SECAM TDA9365/N2-H:DW9365-CH(Masking)

(FS-XXT90,PF-51T31) TDA9365/N2-I : DW9365-CH2(Masking)

CP-785A TDA9385

(DTE-xxxxZH) -OTP : TDA9385/N2/I Not USED PAL TDA9385/N2-I : DW9385-CH1

(FS-xxV81) -Marsking : TDA9385/N2/I

DW9385/N2/-I-CH1

TV-signal Processor

Multi-standard vision IF circuit with alignment-free PLL demodulator Internal (switchable) time-constant for the IF-AGC circuit Source selection between 'Internal' CVBS and external CVBS or Y/C signals Integrated chrominance trap circuit Integrated luminance delay line with adjustable delay time Asymmetrical ‘ delay line type’ peaking in the luminance channel Black stretching for non-standard luminance signals lntegrated chroma band-pass filter with switchable centre frequency Only one reference (12 MHz) crystal required for the -Controller, Teletext and the colour decoder PAL / NTSC or multistandard colour decoder with automatic search system Internal base-band delay line 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. The Text/OSD signals are internally supplied from the -Controller/Teletext decoder Contrast reduction possibility during mixed-mode of OSD and Text signals Horizontal synchronisation with two control loops and alignment-free horizontal oscillator Vertical count-down circuit Vertical driver optimised for DC-coupled vertical output stages Horizontal and vertical geometry processing Horizontal and vertical zoom function for 16 : 9 applications Horizontal parallelogram and bow correction for large screen picture tubes

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Service Manual CP-785A

-Controller

80C51 -controller core standard instruction set and timing 1 s machine cycle

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

Data Capture

Text memory 10 pages Inventory of transmitted Teletext pages stored in the Transmitted Page Table (TPT) and Subtitle Page Table (SPT) Data Capture for US Closed Caption 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 Automatic selection between 625 WST/VPS on line 16 of VBI Real-time capture and decoding for WST Teletext in Hardware, to enable optimised -processor

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

Display

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

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Service Manual CP-785A

Contrast reduction of defined area Cursor Special Graphics Characters with two planes, allowing four colours per character 32 software redefinable On-Screen display characters 4 WST Character sets (GO/G2) in single device (e.g. Latin, Cyrillic, Greek, Arabic) G1 Mosaic graphics, Limited G3 Line drawing characters 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

- 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

+8V

CVBS/Y

IFIN

TUNERAGC

SOUND

TRAP

27 37

VIDEO SWITCH

VIDEO IDENT.

VIDEO FILTERS

(35) (35)

(32)

28 29 44 31 60 55 59 58 57 2 3 4 9 12

10 PAGE

MEMORY

TELETEXT/OSD

DISPLAY

+3.3V

5654 61

(20)

AUDEXT

SIFIN

QSSOUT/AMOUT

AMOUT

RESET

VPE

LED OUT (2x)

VST OUT

ADC IN (4x)

I/O PORTS (4x)

1+62-64

SCL SDA

5-8

10/11

VISION IF

ALIGNMENT-FREE

PLL DEMOD.

AGC/AFC

VIDEO AMP.

CHROMA

PAL/SECAM/NTSC

DECODER

H/V SYNC SEP.

H-OSC. + PLL

(32)

34 16 33 25 26 22 21 36

(20) 46 47 48 45

BLKIN

BCLIN

COR

CONTR/BRIGHTN

OSD/TEXT INSERT

CCC

WHITE-P. ADJ.

HOUT

V-DRIVE

EHTO

EWD

R/V

RGB/YUV INSERT

RGB/YUV MATRIX

SATURATION

YUV/RGB MATRIX

G/Y

B/U

V-DRIVE +

GEOMETRY

ROM/RAM

CVBS

C-BUS

TRANSCEIVER

VST PWM-DAC

I/O PROTS

TELETEXT

ACQUISITION

SYNC

EW GEOMETRY

H-DRIVE

LOOP

H-SHIFT

BASE-BAND

DELAY LINE

REF

QSS SOUND IF

AGC

QSS MIXER

AM DEMODULTOR

ENIANCED

80C51 CPU

LUMA DELAY

PEAKING

BLACK STRETCH

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Service Manual CP-785A

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 Lㅤselected (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 -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 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

PINNING

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Service Manual CP-785A

SYMBOL PIN DESCRIPTION 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

P1.3/T1

P1.6/SCL

P1.7/SDA

P2.0/TPMW

P3.0/ADC0

P3.1/ADC1

P3.2/ADC2

P3.3/ADC3

VSSC/P

P0.5

P0.6

VSSA

SECPLL

VP2

DECDIG

PH2LF

PH1LF

GND3

DECBG

AVL/EWD

VERB

VERA

IFIN1

IFIN2

IREF

VSC

TUNERAGC

AUDEEM/SIFIN1

DECSDEM/SIFIN2

GND2

SNDPLL/SIFAGC

AVL/REFO/AMOUT

P1.2/INT0

P1.1/T0

P1.0/INT1

VDDP

RESET

XTALOUT

XTALIN

OSCGND

VDDC

VPE

VDDA

BLKIN

BCLIN

B2/UIN

G2/YIN

R2/VIN

INSSW2

AUDOUT/AMOUT

CHROMA

CVBS/Y

GND1

CVBSINT

VP1

IFVO/SVO

PLLIF

EHTO

AUDEXT/QSSO/AMOUT

FBISO

HOUT

.34

MXXxxx

TDA935X/6X/8X

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Service Manual CP-785A

4-2 MSP34xxx Multistandard Sound Processor

The MSP34xxx 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)

CP-785A = DTE-25G5THS(FS-59T90)

MSP34xxx MSP3410D, 3415D, 3410G, 3415G Stereo(Nicam& 2-Carrier) DTE-29G5TH(FS-68T90)

CP-785AF=DTE-21U6TH(PF-51T31)

MSP3465G - Mono(Only AV Stereo) CP-785A=DTE-25G4ZH(FS-59V81)

DTE-29G4ZH(FS-68V81)

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Service Manual CP-785A

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

- 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 V (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

XTAL_IN

Audio PLL

D/A

FM1/AM

Demodulator

& NICAM

Decoder

Sound IF

FM2 NICAM A NICAM B

IDENT

ANA_IN1+

Mono

MONO_IN

SC1_IN_L

SCART1

SC1_IN_R

SC2_IN_L

SCART2

SC2_IN_R

LOUD-

SPEAKER L LOUDSPEAKER R

D/A

SCART1_L

SCART1_R

SCARTL

SCARTR

SCARTR Switching Facilities

D/A

A/D

DSP

SCART

SC1_OUT_R

SC1_OUT_L

Loudspeaker

DACM_L

DACM_R

XTAL_OUT

TV standards

TVsystem Position of sound carrier(MHz) Sound modulation Color system Remark 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 FM Stereo SECAM-East

6.5 / 6.7421875 D/K2 N.A

6.5 / 5.85 D/K-NICAM FM-Mono / NICAM

Architecture of MSP3415D

Pin connections and short description

Pin No. Pin Name Type Short description

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 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

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Service Manual CP-785A

Pin No. Pin Name Type Short description

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 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

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Service Manual CP-785A

4-3 TDA894xJ family Stereo Audio Amplifier

The TDA8946J is a dua-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 OUT- 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

(ripple rejection)

12 IN2+ positive input2

MBK936

OUT1-

GND1

Vcc1

OUT1+

n.c.

IN1+

n.c.

IN1-

IN2-

MODE

SVR

IN2+

n.c

OUT2+

GND2

Vcc2

OUT2-

TDA8944J

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Service Manual CP-785A

CC1

IN2-

TDA8944J

IN2+

MODE

SVR

STANDBY/

MUTE LOGIC

3 16

IN1-

IN1+

2 15

MBK933

OUT1-

OUT1+

OUT2-

OUT2+

GND2

GND1

SHORT CIRCUIT

AND

TEMPERATURE

PROTECTION

CC2

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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Service Manual CP-785A

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

i(pos)

i(neg)

iew

GND

oEW

flb

o(guard)

comp

TDA8358J

comp

0(guard)

i(diff)

i(sb)

-V

i(diff)

i(sb)

-V

i(diff)

iEW(top)

iEW(bot)

i(neg)

input/

feedback

i(neg)

i(pos)

1113

comp

guard

flb

oEW

GND

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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/s 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 Vi(1) inverting input 1 2 Vi(2) inverting input 2 3 Vi(3) inverting input 3 4 GND ground (fin) 5 Iom black current measurement output 6 VDD supply voltage 7 VOC(3) cathode output 3 8 VOC(2) cathode output 2 9 VOC(1)

cathode output 1

Vi(1)

Vi(2)

Vi(3)

GND

Iom

VDD

Voc(3)

Voc(2)

Voc(1)

TDA6107Q

MGK277

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Service Manual CP-785A

i(1),

i(2),

i(3)

1,2,3

THERMAL

PROTECTION

CIRCUIT

VIP

REFERENCE

DIFFERENTIAL

STAGE

3x3x

MIRROR 4

CASCODE 1

MIRROR 5

9,8,7

oc(3),

Voc(2),

oc(1)

MIRROR 3

MIRROR 2

MIRROR 1

CASCODE 2

MGK278

o(m)

TDA6107Q

CURRENT

SOURCE

BBlloocckk ddiiaaggrraamm TTDDAA66110077Q

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 contro 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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