Sharp 21FL-90N Schematic

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21LF-90N

SERVICE MANUAL

SE0021LF90N00

Issued: 16th Feb. 2004

AK- 44 CHASSIS

PAL B/G / SECAM L/L’, B/G, D/K SYSTEM COLOUR TELEVISION

MODEL 21LF-90NES

In the interests of user safety (required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.

In order to service the model 21LF-90N, refer to the AK-44 Chassis Service Manual (SE00AK44CHA00).

CONTENTS

ELECTRICAL SPECIFICATIONS ........................................................................................ 3

IMPORTANT SERVICING NOTES ...................................................................................... 4

CONTROLS & TERMINALS ................................................................................................ 5

PRINTED WIRING BOARD LAYOUT ................................................................................. 6

PARTS LISTING ................................................................................................................... 7

HOW TO UPDATE THE TECHNICAL INFORMATION ...................................................... 11

SHARP CORPORATION

This document has been published to be used for after sales service only.

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21LF-90N

SERVICE MANUAL UPDATE LOG SHEET

Technical Report No. Technical Bulletin No.

Cause / Solution

Part No.

Page No.

Application Data /Serial No.

Use this page to keep any special servicing information as Technical Report (Bulletin), Technical Information, etc. If only part number changes are required, just change part number directly the part number in the Parts Listing Section. If you need more information, please refer to the Technical Report (Bulletin).

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ELECTRICAL SPECIFICATIONS

21LF-90N

•Power Input .................... 220V-240 Volts AC 50 Hz

•Power Consumption

Normal Operation (Method IEC60107) .............. 62 W

Stand-by Operation .......................................... < 3 W

•Audio Power Output Rating (MPO) / Impedance

Internal Left Speaker ................................. 4 W, 16 Ω

Internal Right Speaker ............................... 4 W, 16 Ω

•Speakers

Speaker elliptic (2 pcs) .......................... 50 x 120 mm

•Convergence (Maximum Misconvergence)

AREA 21”

A0.3 BC 1.0 DE 1.0 FGHJ 1.3 KLMN 1.2 F’G’H’J’ 1.2 STUV 1.1

•Picture Intermediate frequency

L’ ................................................ 33.9MHz

L, B/G, D/K .............................. 38.9MHz

•Sound Carrier Trap

L’ ................................................ 40.4MHz

L, D/K ......................................... 32.4MHz

B/G ............................................ 33.4MHz

•Adjacent Sound Carrier Trap

L’ ................................................ 32.4MHz

L, D/K, B/G ................................ 40.4MHz

•Adjacent Picture Carrier Trap

L’ ................................................ 41.9MHz

L, D/K ...................................... 30.9MHz

B/G ............................................ 31.9MHz

•Aerial Input Impedance

VHF/UHF ................. 75 ohm Unbalanced

•Tuning Ranges ..... 48.25MHz thru 855.25 MHz

VHF: S1 - S41 CH (Hiperband) E2 - E12 / F2 - F10 UHF: E21 - E69

•White Level Apply the rated voltage at the rated frequency to the TV set, while it is receiving full white pattern RF signal of 60 dB/µV from its RF input via the pattern generator. Turn all picture controls to maximum value. Measure the colour temperatures at the center of the screen by using the colour analyzer.

X=0.290 ± 0.015 Y=0.300 ± 0.015

Specifications are subject to change without prior notice.

MODEL DESTINATION (Operation Manual Languages)

21LF-90NES: Español, Português.

WARNING

The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power receptacle, when servicing this chassis. To prevent electric shock, do not remove cover. No user-serviceable parts inside. Refer servicing to qualified service personnel.

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21LF-90N

Only qualified service personnel are allowed to carry out maintenance and repair of this receiver.

Servicing of High Voltage System and CRT

It is important that the static charge is removed from the high voltage system when carrying out work on the receiver. This can be achieved by connecting a 10K resistor (with a suitably insulated lead) from the CRT cavity connector to the CRT ground tag. This must be carried out with the AC supply disconnected from the receiver.

Note the following:

•

• If the CRT has to be changed it MUST be replaced with the correct type for continued safe working.

• DO NOT lift the CRT by its neck.

• When handing the CRT, ensure that shatterproof goggles are worn.

• Ensure that the CRT is discharge before handling.

IMPORTANT SERVICING NOTES

The CRT in this receiver employs Integral Implosion Protection.

X-Ray

This receiver is designed to keep any x-ray emission to an absolute minimum. Some fault conditions and servicing procedures may produce potentially hazardous x-ray radiation levels. This is a problem when in close proximity to the receiver for long periods of time. To reduce any risks associated with this, please observe the following precautions:

1. When undertaking any servicing on this chassis, DO NOT increase the EHT to more than 30.0 KV, (at a

instantaneous beam current of 1300 µA).

2. Ensure that during normal operation the EHT does not exceed 25.55 KV (at a beam current of 1000 µA). This level has been preset in the factory. Always check that this level has not been exceeded after carrying out any repair on the receiver.

3. DO NOT replace the CRT with any other type than that specified in the parts listing as this may cause excessive x-ray radiation.

Before returning the receiver to the customer

In addition to the above checks, the following should also be carried out before returning the receiver to the customer.

1. Inspect all the leads to ensure that they are dressed correctly and that they are not obstructed or pinched by any other parts.

2. Ensure that all protective devices are in good condition. These will include nonmetallic control knobs, insulating fish papers, cabinets backs, compartment covers or shields, mechanical insulators, etc.

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CONTROLS & TERMINALS

21LF-90N

Speakers (left + right)

= Power On / Off

= Volume -/+

CH = Program -/+

MENU = Menu

VIDEO = VCR

AUDIO L = Audio left

AUDIO R = Audio right

= Headphone 3,6 mm Ø

= Stand By

= Cursor Up

= Cursor Right

OK = OK

= Info (Program Menu)

0 - 9 = Direct Program

-/-- = Double Digit

= Wide mode button

P/CH+ = Program +

+ = Volume +

= TV / Quit Menu

EXT

= EXT button

(SCART, F- AV, RGB)

Yellow = Feature Menu

Blue = Installation Menu

= Hold

= Update

= Index Page

= Reveal

= Expand

= Mix

= Teletext

= Time

Red = Sound Menu

Green = Picture Menu

= Mute

I-II = Mono/Stereo - Dual I-II

- = - Volume

- P/CH = -Program

= Flash back button

M = Menu

= Cursor Down = Cursor Left

REMOTE CONTROL

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21LF-90N

Mother Unit

CHASSIS LAYOUT

CRT Unit

Headphone Unit

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21LF-90N

PARTS LISTING

REPLACEMENT PARTS

Replacement parts which have special safety characteristics are identified in this manual. Electrical components having such features are identified by in the Replacement Parts Listing. The use of a substitute replacement part which does not have the same safety characteristics as the factory recommended is not permitted. Replacement parts not shown in this service manual may create shock fire, or other hazards.

HOW TO ORDER REPLACEMENT PARTS

To have your order completed promptly and correctly please supply the following information.

1. MODEL NUMBER 2. REF. NO.

3. PART NO. (*) 4. DESCRIPTION

5. CODE 6. QUANTITY

(*) When ordering any part, a “V” should be added before the Part No.

(*)

REF No. PARTS DESCRIPTION SN CODE EX CODE

PICTURE TUBE

. 30017634 21" CPT TUBE SAFE EW FREE REALFLAT BW CQ . 30028644 21 DEG COIL&EARTH CB. WO/UL FLAT SHARP AG AR

TUNER

TU201 30009637 TUNER WSP (PLL) 38.9 MK2 - BATCH AR BC

INTEGRATED CIRCUITS

IC101 30018063 IC HT48RA0A OTP AF AR IC118 30001506 IC TL431 AC AH IC301 30011824 IC TDA7266 AF AR IC403 30026922 IC STV2248H (SHRINK56) AR BC IC502 30001669 PREAMPLIFIER TFMS1380 AD AM IC700 30013658 IC MSP3410G SDIP64 AS BD IC800 30011968 IC SMPS MC44608 DIP8 AF AQ IC801 30015087 IC SAFE OPTOCOUPLER TCET1102G AA AE IC803 30001500 IC LM7808 AC AH IC804 30001622 IC 7805 (1A) AB AF IC806 30014346 IC 78L05 TO-92 (100mA) AA AE

TRANSISTORS

Q100 30001453 TR BC337 AA AC Q601 30013656 TR POWER STX112-AP AA AE Q804 30001454 TR BC548B AA AC

DIODES

D100 30002733 LED INFRARED IR333 AA AC D1001 30003722 DIODE ZENER ZPD15V AA AA D1003 30003722 DIODE ZENER ZPD15V AA AA D106 30001377 DIODE ZENER 33V UZT 33B AB AF D407 30001284 DIODE 1N4148 0.15A/100V 0.5A AA AB D505 30001284 DIODE 1N4148 0.15A/100V 0.5A AA AB D506 30001284 DIODE 1N4148 0.15A/100V 0.5A AA AB D509 30001279 LED RED/GREEN LTL293SJ AC AH D602 30001329 DIODE 1N4007 1A/1000V 30A AA AB D608 30001318 DIODE BA159 1A/800V 20A AA AB D609 30001318 DIODE BA159 1A/800V 20A AA AB D610 30001318 DIODE BA159 1A/800V 20A AA AB D614 30001318 DIODE BA159 1A/800V 20A AA AB D620 30001349 DIODE ZENER 11V AA AB D701 30001369 DIODE ZENER 3.6V ZPD AA AB D800 30001318 DIODE BA159 1A/800V 20A AA AB D801 30001347 DIODE ZENER 8.2V AA AB D802 30001318 DIODE BA159 1A/800V 20A AA AB D803 30001315 DIODE BYD33D 1A/200V 20A AA AE D804 30001318 DIODE BA159 1A/800V 20A AA AB D805 30009366 DIODE UF5402 3A/200V 150A AB AF D806 30001315 DIODE BYD33D 1A/200V 20A AA AE D808 30007681 DIODE UF5407 3A/800V 150A AB AF

REF No. PARTS DESCRIPTION SN CODE EX CODE

D809 30001329 DIODE 1N4007 1A/1000V 30A AA AB D811 30001329 DIODE 1N4007 1A/1000V 30A AA AB D813 30001329 DIODE 1N4007 1A/1000V 30A AA AB D837 30001329 DIODE 1N4007 1A/1000V 30A AA AB D838 30001329 DIODE 1N4007 1A/1000V 30A AA AB D889 30001384 TR MCR22-6 AB AG D890 30001329 DIODE 1N4007 1A/1000V 30A AA AB D893 30001318 DIODE BA159 1A/800V 20A AA AB D894 30001318 DIODE BA159 1A/800V 20A AA AB D900 30001318 DIODE BA159 1A/800V 20A AA AB D901 30001318 DIODE BA159 1A/800V 20A AA AB D902 30001318 DIODE BA159 1A/800V 20A AA AB D903 30001344 DIODE ZENER 6.2V 1/2W AA AB D904 30001349 DIODE ZENER 11V AA AB D905 30001349 DIODE ZENER 11V AA AB D906 30001349 DIODE ZENER 11V AA AB

PACKAGED CIRCUITS

X100 30002852 XTAL REZ 455KHZ AA AD X401 30001749 XTAL 4.433619 MHZ (AK15) AC AK X402 30015592 XTAL 3.579545 (WO/LOAD CAP) AB AG X403 30000074 CAP MKT 100NF 63V J AA AC X501 30002851 XTAL 4MHZ L.C=30PF AC AH X700 30001756 XTAL 18.432MHZ AE AP

COILS

L1001 30001996 FIXED COIL 22UH Q40 K AA AB L1002 30001996 FIXED COIL 22UH Q40 K AA AB L101 30013412 FERRITE BEAD (0805) MMZ2012Y152B AA AA L110 30013412 FERRITE BEAD (0805) MMZ2012Y152B AA AA L111 30013412 FERRITE BEAD (0805) MMZ2012Y152B AA AA L112 30013412 FERRITE BEAD (0805) MMZ2012Y152B AA AA L113 30013412 FERRITE BEAD (0805) MMZ2012Y152B AA AA L114 30013412 FERRITE BEAD (0805) MMZ2012Y152B AA AA L201 30001979 FIXED COIL 1UH Q45 M-A AA AB L210 30001971 FERRITE BEAT (805) BLM21A601S AA AD L211 30001971 FERRITE BEAT (805) BLM21A601S AA AD L401 30001971 FERRITE BEAT (805) BLM21A601S AA AD L402 30001992 FIXED COIL 10UH Q65 K-A AA AB L403 30001971 FERRITE BEAT (805) BLM21A601S AA AD L404 30001990 FIXED COIL 6.8UH Q75 K AA AB L405 30014048 ADJ.COIL VIF 44MHZ Q=64 C=39pF AA AE L406 30001971 FERRITE BEAT (805) BLM21A601S AA AD L407 30002002 FIXED COIL 47UH Q60 K AA AB L603 30018501 LINEARITY COIL 100UH AB AG L700 30001971 FERRITE BEAT (805) BLM21A601S AA AD L701 30001971 FERRITE BEAT (805) BLM21A601S AA AD L702 30001996 FIXED COIL 22UH Q40 K AA AB L703 30001979 FIXED COIL 1UH Q45 M-A AA AB L704 30001979 FIXED COIL 1UH Q45 M-A AA AB L802 30001971 FERRITE BEAT (805) BLM21A601S AA AD L803 30000580 RES CF 1/4W 22R J AA AB L805 30001971 FERRITE BEAT (805) BLM21A601S AA AD L806 30001971 FERRITE BEAT (805) BLM21A601S AA AD L807 30001992 FIXED COIL 10UH Q65 K-A AA AB

CERAMIC FILTERS

Z401 30012545 FILTER SAW K9656M AG AR Z402 30014261 FILTER SAW K3958M AF AR Z404 30001724 FILTER SER TRAP TPS 5.5MHZ AB AF

TRANSFORMERS

TR601 30017788 TRF FBT SAFE 90ø (AK30,AK36 LAYER TYPE) AT BE TR801 30002100 LINE FILTER SAFE 2*27MH AC AH TR802 30027707 TRF SMPS AK44 RF (170-270V) Audio=14V AF AQ

CAPACITORS

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21LF-90N

REF No. PARTS DESCRIPTION SN CODE EX CODE

C100 30000352 CAP EL 100UF 16V M AA AB C201 30000400 CAP EL 47UF 50V M AA AB C205 30000371 CAP EL 22UF 50V M AA AB C300 30000400 CAP EL 47UF 50V M AA AB C302 30000092 CAP MKT 220NF 63V J AA AD C305 30000092 CAP MKT 220NF 63V J AA AD C404 30000225 CAP CER 220PF 50V J SL AA AB C409 30000345 CAP EL 10UF 50V M AA AB C410 30000384 CAP EL 2.2UF 50V M AA AB C411 30000345 CAP EL 10UF 50V M AA AB C413 30000362 CAP EL 1UF 50V M AA AB C416 30000362 CAP EL 1UF 50V M AA AB C417 30000362 CAP EL 1UF 50V M AA AB C419 30000413 CAP EL 4.7UF 50V M AA AB C420 30000100 CAP MKT 330NF 63V J AA AD C422 30000400 CAP EL 47UF 50V M AA AB C423 30000400 CAP EL 47UF 50V M AA AB C424 30000345 CAP EL 10UF 50V M AA AB C431 30000362 CAP EL 1UF 50V M AA AB C433 30000345 CAP EL 10UF 50V M AA AB C436 30000109 CAP MKT 470NF 63V J AA AD C440 30000074 CAP MKT 100NF 63V J AA AC C442 30000362 CAP EL 1UF 50V M AA AB C443 30000362 CAP EL 1UF 50V M AA AB C444 30000384 CAP EL 2.2UF 50V M AA AB C446 30000345 CAP EL 10UF 50V M AA AB C460 30000345 CAP EL 10UF 50V M AA AB C502 30000396 CAP EL 47UF 16V M AA AB C513 30000371 CAP EL 22UF 50V M AA AB C519 30000352 CAP EL 100UF 16V M AA AB C531 30000384 CAP EL 2.2UF 50V M AA AB C536 30000074 CAP MKT 100NF 63V J AA AC C541 30000109 CAP MKT 470NF 63V J AA AD C542 30000205 CAP CER 150PF 50V J SL AA AB C543 30000205 CAP CER 150PF 50V J SL AA AB C603 30000384 CAP EL 2.2UF 50V M AA AB C604 30000400 CAP EL 47UF 50V M AA AB C608 30000107 CAP MKT 47NF 250V J AA AD C610 30018901 CAP EL 100UF 50V M 105° AA AB C611 30000092 CAP MKT 220NF 63V J AA AD C613 30000078 CAP MKT 1UF 100V M AB AF C615 30000359 CAP EL 1000UF 16V M AA AC C616 30000400 CAP EL 47UF 50V M AA AB C618 30000134 CAP MKP SAFE 11NF 2000V %3.5 AC AH C619 30000131 CAP MKP SAFE 100NF 250V J AA AB C624 30000350 CAP EL 10UF 250V M AA AD C627 30006750 CAP MKP 220NF 400V J AA AD C628 30018380 CAP EL 3.3UF 160V M 105° AA AB C631 30000410 CAP EL 470UF 50V M AB AF C632 30000100 CAP MKT 330NF 63V J AA AD C634 30000409 CAP EL 470UF 25V M AA AD C635 30000100 CAP MKT 330NF 63V J AA AD C636 30000400 CAP EL 47UF 50V M AA AB C641 30000345 CAP EL 10UF 50V M AA AB C643 30000116 CAP MKT 68NF 63V J AA AC C644 30000362 CAP EL 1UF 50V M AA AB C705 30000345 CAP EL 10UF 50V M AA AB C706 30000345 CAP EL 10UF 50V M AA AB C712 30000345 CAP EL 10UF 50V M AA AB C720 30000345 CAP EL 10UF 50V M AA AB C724 30000345 CAP EL 10UF 50V M AA AB C730 30000393 CAP EL 3.3UF 50V M AA AB C733 30000345 CAP EL 10UF 50V M AA AB C734 30000345 CAP EL 10UF 50V M AA AB C736 30000345 CAP EL 10UF 50V M AA AB C737 30000371 CAP EL 22UF 50V M AA AB

REF No. PARTS DESCRIPTION SN CODE EX CODE

C738 30000371 CAP EL 22UF 50V M AA AB C801 30000094 CAP MKT SAFE 220NF 275V M AC AA AB C802 30000094 CAP MKT SAFE 220NF 275V M AC AA AB C803 30000433 CAP CER 1NF 1KV M B AA AB C805 30018085 CAP VAR SAFE 510V K MFCN14D511 AA AD C806 30000433 CAP CER 1NF 1KV M B AA AB C808 30000295 CAP CER 100NF 50V Z F AA AB C809 30000420 CAP EL 150UF 400V M AF AQ C810 30000400 CAP EL 47UF 50V M AA AB C811 30000161 CAP MKP SAFE 47NF 630V J AB AE C813 30000295 CAP CER 100NF 50V Z F AA AB C816 30000440 CAP CER SAFE 2.2NF 4KV M AA AC C817 30000198 CAP CER 120PF 500V J SL AA AB C822 30007308 CAP CER 220PF 1KV K (PULSE) AA AD C824 30009208 CAP CER 470PF 1KV K (PULSE) AA AC C827 30000411 CAP EL 4700UF 16V M AC AH C828 30000295 CAP CER 100NF 50V Z F AA AB C829 30000359 CAP EL 1000UF 16V M AA AC C830 30000382 CAP EL 2200UF 16V M AB AF C832 30000295 CAP CER 100NF 50V Z F AA AB C833 30000407 CAP EL 470UF 16V M AA AC C834 30000295 CAP CER 100NF 50V Z F AA AB C836 30000431 CAP CER 100PF 1KV M AA AC C838 30000352 CAP EL 100UF 16V M AA AB C839 30000352 CAP EL 100UF 16V M AA AB C840 30000352 CAP EL 100UF 16V M AA AB C843 30000431 CAP CER 100PF 1KV M AA AC C848 30000352 CAP EL 100UF 16V M AA AB C849 30000352 CAP EL 100UF 16V M AA AB C850 30000352 CAP EL 100UF 16V M AA AB C855 30000407 CAP EL 470UF 16V M AA AC C859 30013533 CAP CER 100PF 1KV K (PULSE) AA AC C862 30000367 CAP EL 1UF 250V M AA AB C864 30000440 CAP CER SAFE 2.2NF 4KV M AA AC C907 30000434 CAP CER 1NF 2KV K B AA AB C908 30000415 CAP EL 4.7UF 250V M AA AC C912 30000075 CAP MKT 100NF 250V K (DC) AA AD

RESISTORS

R1001 30000492 RES CF 1/4W 120R J AA AA R1002 30000492 RES CF 1/4W 120R J AA AA R105 30000792 RES CF 1/4W 75R J AA AB R127 30000459 RES CF 1/4W 100R J AA AB R204 30000459 RES CF 1/4W 100R J AA AB R206 30000459 RES CF 1/4W 100R J AA AB R301 30000471 RES CF 1/4W 10K J AA AB R302 30000471 RES CF 1/4W 10K J AA AB R407 30000590 RES CF 1/4W 2.2K J AA AB R410 30000590 RES CF 1/4W 2.2K J AA AB R420 30000466 RES CF 1/4W 1K J AA AB R424 30000712 RES CF 1/4W 470R J AA AB R428 30000792 RES CF 1/4W 75R J AA AB R437 30000466 RES CF 1/4W 1K J AA AB R438 30000466 RES CF 1/4W 1K J AA AB R442 30000466 RES CF 1/4W 1K J AA AB R450 30000712 RES CF 1/4W 470R J AA AB R469 30000670 RES CF 1/4W 330K J AA AB R507 30000466 RES CF 1/4W 1K J AA AB R508 30000622 RES CF 1/4W 270R J AA AB R510 30000737 RES CF 1/4W 5.1K J AA AB R513 30000459 RES CF 1/4W 100R J AA AB R514 30000459 RES CF 1/4W 100R J AA AB R518 30000471 RES CF 1/4W 10K J AA AB R525 30000583 RES CF 1/4W 220R J AA AB R527 30000718 RES CF 1/4W 4.7K J AA AB R534 30000526 RES CF 1/4W 1.5K J AA AB

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21LF-90N

REF No. PARTS DESCRIPTION SN CODE EX CODE

R535 30000718 RES CF 1/4W 4.7K J AA AB R536 30000471 RES CF 1/4W 10K J AA AB R546 30000560 RES CF 1/4W 1.8K J AA AB R559 30000470 RES CF 1/2W 10K J AA AA R562 30000471 RES CF 1/4W 10K J AA AB R601 30000752 RES CF 1/4W 56K J AA AB R602 30000820 RES CF 1/4W 82K J AA AB R605 30000513 RES CF 1/4W 130K J AA AB R623 30000607 RES CF 1/4W 2.2R J AA AB R624 30001120 RES MO 2W 22R J AA AB R625 30000900 RES MF 1/4W 1.8K J AA AB R627 30000910 RES MF 1/2W 1.8R G AA AB R630 30000828 RES CF 1/4W 8.2M J AA AB R631 30000885 RES MF 1/4W 1.5K J AA AB R633 30000650 RES CF 1/4W 33R J AA AB R637 30000621 RES CF 1/2W 270R J AA AB R638 30000589 RES CF 1/2W 2.2K J AA AA R639 30000718 RES CF 1/4W 4.7K J AA AB R645 30018904 RES MO 5W 4.7k J AA AD R646 30014941 RES CF 1/4W 16K J AA AA R647 30000466 RES CF 1/4W 1K J AA AB R648 30001216 RES FUSE 1W 1.2R J AA AA R649 30014941 RES CF 1/4W 16K J AA AA R650 30000744 RES CF 1/4W 560R J AA AB R654 30000458 RES CF 1/2W 100R J AA AB R655 30000705 RES CF 1/2W 47R J AA AB R659 30001151 RES MO 3W 330R J AA AD R662 30000712 RES CF 1/4W 470R J AA AB R663 30000459 RES CF 1/4W 100R J AA AB R666 30001077 RES MO 2W 10R J AA AC R701 30000459 RES CF 1/4W 100R J AA AB R703 30000459 RES CF 1/4W 100R J AA AB R705 30000459 RES CF 1/4W 100R J AA AB R801 30000982 RES MF 1/4W 4.7K J AA AA R804 30000504 RES CF 1/4W 120K J AA AB R805 30000843 RES MF 1/4W 10R J AA AB R806 30000982 RES MF 1/4W 4.7K J AA AA R807 30001159 RES MO 1W 0.33R J AA AB R810 30001257 RES MG SAFE 1/2W 4.7M J AA AD R811 30000594 RES CF 1/4W 22K J AA AB R813 30000718 RES CF 1/4W 4.7K J AA AB R815 30000452 RES CF 1/4W 10R J AA AB R817 30001037 RES MF 1/4W 99K F AA AB R818 30006463 RES MF 1/4W 2K F AA AA R819 30000810 RES CF 1/4W 820R J AA AB R821 30000470 RES CF 1/2W 10K J AA AA R828 30001265 NTC MONITOR 10R/3A SCK-103 AA AB R829 30000718 RES CF 1/4W 4.7K J AA AB R836 30001224 RES FUSE SAFE 1/2W 0.22R J AA AB R900 30006712 FERRITE BEAD 3.5X4.7X0.8 AA AB R901 30006712 FERRITE BEAD 3.5X4.7X0.9 AA AB R902 30006712 FERRITE BEAD 3.5X4.7X0.10 AA AB R903 30000886 RES MF 1/4W 1.5K F AA AB R904 30000886 RES MF 1/4W 1.5K F AA AB R905 30000886 RES MF 1/4W 1.5K F AA AB R906 30000525 RES CF 1/2W 1.5K J AA AB R919 30001213 RES FUSE 1/4W 1R J AA AA

MISCELLANEOUS PARTS

F801 20000848 FUSE ASSY.TK79-A (2.5A) AA AD JK1 30027655 JACK RCA 1P WHITE SHARP (AK44) AA AC JK100 30001900 JACK HEADPHONE HP01/2/3/4/5/6 AD AM JK100 30027656 JACK RCA 1P RED SHARP (AK44) AA AC JK2 30027654 JACK RCA 1P YELLOW SHARP (AK44) AA AC NOT1 30009849 CABL 1P/70 SIS AA AB PL100 30001829 CONN HEADER 2P 2.5MM TOP WHT SD AA AB

REF No. PARTS DESCRIPTION SN CODE EX CODE

PL100 30017791 CONN.ASSY.2/25 WHITE SI EXT.SPK&NELTRON AA AD PL100 30017953 CONN MALE 5P SIDE WHITE AA AA PL100 30018454 CONN HEADER 2P 2.5MM TOP BLACK AA AA PL100 30027658 CNAS 2P+3P/300 W/C BLK&WHT UL1007AWG24 AB AF PL101 30015053 SOCKET SCART NEW TYPE AB AF PL105 30001830 CONN HEADER 2P 2.5MM TOP BLUE SD AA AB PL107 30001835 CONN HEADER 3P 2.5MM TOP WHT SD AA AB PL109 30015192 CONN HEADER 2P 2.5MM TOP YELLOW SD AA AA PL110 30001830 CONN HEADER 2P 2.5MM TOP BLUE SD AA AB PL110 30027659 CNAS 2P/150 W/DC SHL BLUE AC AH PL115 30001835 CONN HEADER 3P 2.5MM TOP WHT SD AA AB PL115 30002251 CNAS 3P/280 SHL W/DC UL2547AWG24 AB AF PL301 30001829 CONN HEADER 2P 2.5MM TOP WHT SD AA AB PL302 30018454 CONN HEADER 2P 2.5MM TOP BLACK AA AA PL405 30006709 CONN HEADER 5P 2.5MM TOP WHT SD AA AB PL407 30001836 CONN HEADER 3P 2.5MM TOP BLACK SD AA AB PL501 30001783 CONN HEADER 5P 2.5MM TOP BD AA AC PL503 30009085 CABLE 1P R2.6 35 W/CLIPS AA AC PL504 30019101 CABL 1P/350 DIS UL1672AWG22 AA AB PL601 30001827 CONN HEADER 4P 5/7.5MM TOP WHT AA AD PL602 30006660 CONN HEADER 4P 2.5MM TOP WHT SD AA AB PL801 30001792 CONN HEADER 2P 7.5MM TOP WHT AA AC PL802 30001795 CONN HEADER 3P 5/7.5MM TOP WHT AA AC PL900 30016695 CNAS 5P/450 FLT W/C+CBLH UL2468AWG24 AB AE PL902 30016694 CNAS 4P/450 FLT W/C+CBLH UL2468AWG24 AA AE PL903 30001855 SOCKET CRT SAFE NARROWNECK W/GND AD AM SG900 30000428 SPARK GAP 300V AB AG SG901 30000428 SPARK GAP 300V AB AG SG902 30000428 SPARK GAP 300V AB AG SW506 30016022 SWITCH TACT VERTICAL T&R AA AB SW507 30016022 SWITCH TACT VERTICAL T&R AA AB SW508 30016022 SWITCH TACT VERTICAL T&R AA AB SW509 30016022 SWITCH TACT VERTICAL T&R AA AB SW510 30016022 SWITCH TACT VERTICAL T&R AA AB SW801 30017848 SWITCH SAFE ON/OFF 4A/128A JVC AC AH TH800 30001268 THERMISTOR 3P AD AM . 20092581 CABLE ASSY.4/45 (HRZ&VER) IMPROVED NEW AB AF . 20141421 CRT B.ASSY.TP44-RF/SF (AK44) AQ BA . 20141673 CRT B.ASSY.TP44-OTO RF/SF (AK44) AD AN . 20143374 IC 24C08 U00125110210121202 AB AE . 20145022 CHS.ASSY.44-512B215132231E BM CC . 20146661 MD.ASY.HP44-STEREO (HP+FAV) (AK44) AE AP . 20151167 SPK.AS.2163 SHARP STR (AK44) AR BC . 20151168 SPK.AS.2163 SHARP (R) (AK44) AM AX . 20151169 SPK.AS.2163 SHARP (L) (AK44) AM AX . 20151304 POWER CORD ASSY.(2.4MT W/FTZ)(AK44SHARP) AD AM . 20157066 PR.IC.36/44-SHARP 36_44_A17 AU BF . 20069673 FIRE BARRIER (I) (NATURAL-V.O.)(AK30) AA AC . 30001386 TR MTP6N60E (PLASTIC) AE AP . 30001448 TR BU808DFI AF AQ . 30001731 FUSE SAFE 2.5A 250V 5*20MM AA AC . 30001793 CONN HOUSING 2P 7.5MM TOP AA AD . 30006987 IC 24C08 (WP) AC AH . 30007248 CONN HOUSING 4P 3.96MM TOP WHT AA AB . 30009366 DIODE UF5402 3A/200V 150A AB AF . 30009783 SOCKET IC 56P (SHRINK) AC AH . 30009784 SOCKET IC 8P (DIP) AA AB . 30014568 TERMINAL SSC 2000T AA AB . 30017855 CONN.ASSY.4/45 (HRZ&VER) IMPROVED NEW AB AF . 30018426 CNAS 2P/690 SIS W/BLK C+FER UL1007AWG24 AB AF . 30018427 CNAS 2P/500 SPK SIS W/C+FER UL1007AWG24 AB AF . 30025172 IC TDA6107JF/N3 AF AQ . 30026954 PCB 11UK12 AB AF . 30027134 SPEAKER 16R 4W F/R 50x120MM-21" SHARP AF AR . 30028208 POWER CORD SAFE EURO 2.2M SHARP W/FILTER AG AT . 35000136 FUSE HOLDER TK79-A (GRAY) AA AD

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REF No. PARTS DESCRIPTION SN CODE EX CODE

ARTWORK

. 20141199 SCR.ASSY.2163 HP (2SP) AC AK . 20143026 R/C 1548 SHARP (EKO2GRAY/I) (GRAY/S) AM AY . 35000158 NUT C ZN BOTTOM M3 AA AB . 35000165 KNURL WASHER C ZNSY 3*6*04 (M3) AA AB . 35000180 SCREW C ZN YSMB M3*6 AA AA . 35000181 SCREW C ZN YSMB M3*8 AA AB . 35000182 SCREW C ZN YSMB M3*10 AA AA . 35000224 SCREW C SK ZN YFMB 2.9*9.5 AA AB . 35004572 SCREW P C AgSYF YSB 4x20 AA AB . 35005084 SCREW C ZN RYAKB 6x30 AA AB . 35005418 SCREW P C ZN YSB 3.5x10 (KN1031 T35X10) AA AA . 35008081 SCREW P C ZN YFMB 3*9.5 AA AA . 35008812 SCREW P C ZN RYSB 3x10 AA AB . 35009300 SCREW P C SYF RYSB 4*11 AA AB . 40016817 LOGO SHARP (D.C.-SILVER)21"RF AC AH . 50043630 WARRANTY CARD SHARP (ESP) AB AF . 50043894 CONTROL STICKER STREO 2163RF SHARP AD AN . 50048335 CARTON BOX SHARP SHARP (2163) AL AX . 50048448 I/B SHARP 21LF90N(ES) P/AK44/1548/ES/POR AD AL

COSMETICS

. 20140383 BACK CVR.2163RF EKO2GRAY (AK44) AQ BA . 20140387 SNOW BOX TOP 2163RF SHARP AA AA . 20140388 SNOW BOX BOTTOM 2163RF SHARP AA AA . 20141198 BUTTON ASSY 2163 (SLV285S/P) AC AK . 20141200 SNOW BOX ASSY 2163 AA AA . 20146997 CONTROL PAN.DOOR 2163RF SHARP SLV285S(P) AD AM . 20151084 FRONT2163AV/3H W/H&J SLV285S(P)(PW/S)2SK AR BC . 40012331 RUBBER PAD (RC 1542) AD AL . 40016859 RUBBER WASHER 2163RF (I) SHARP AA AB . 40016871 DOOR SPACER (M10) AA AA

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21LF-90N

How to update the Technical Information appeared on this Service Manual

1. Web site: https://www.vestelservice.com

2. Select: Technical Support

3. Login: 101278

4. Password: SHPII278

By this access you can consult the latest schematic diagram or request the Parts Listing of a concrete Production Date / Serial Number.

By this way it can be also consulted the issued Technical Reports (Service Bulletins).

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21LF-90N

No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.

Technical information and Production:

Vestel Electronik AS

PRINTED BY: ON:

Technical information re-issued:

SHARP ELECTRONICA ESPAÑA S.A. Service Manual Group Engineering Dept. Polígono Industrial Can Sant Joan 08190 Sant Cugat del Vallès Barcelona Spain

Think Ecology, please use

RECYCLED PAPER

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CHASSIS

SERVICE MANUAL

SE00AK44CHA00

Issued: 9th March 2004

PAL B/G, I / SECAM L/L’, B/G, D/K SYSTEM COLOUR TELEVISION

CHASSIS AK-44

In the interests of user safety (required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.

CONTENTS

TABLE OF CONTENTS ....................................................................................................... 3

INTRODUCTION .................................................................................................................. 6

CIRCUIT DESCRIPTIONS ................................................................................................... 6

INTEGRATED CIRCUIT DESCRIPTIONS ....................................................................... 13

BLOCK DIAGRAM ................................................................................................................ 22

SERVICE MODE ADJUSTMENTS ...................................................................................... 23

HOTEL MODE FUNCTIONS ................................................................................................ 30

CIRCUIT DIAGRAMS ..................................................................................................... 31

HOW TO UPDATE THE TECHNICAL INFORMATION ...................................................... 41

SHARP CORPORATION

This document has been published to be used for after sales service only.

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CHASSIS

SERVICE MANUAL UPDATE LOG SHEET

Technical Report No. Technical Bulletin No.

Cause / Solution

Part No.

Page No.

Application Data /Serial No.

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CHASSIS

TABLE OF CONTENTS

SAFETY PRECAUTIONS ............................................................................................................................................... 5

TV set switched off ............................................................................................................................................... .....5

Measurements ....................................................................................................................................................... 5

PERI-TV SOCKET ........................................................................................................................................................... 5

SCART 1........................................................................................................................................................................... 5

1. INTRODUCTION ......................................................................................................................................................... 6

CIRCUIT DESCRIPTIONS ............................................................................................................................................. 6

2. SMALL SIGNAL PART WITH STV2248 ..................................................................................................................... 6

2.1 Vision IF amplifier ........................................................................................................................................... 6

2.2 QSS Sound circuit (QSS versions) ................................................................................................................. 6

2.3 AM Demodulator ........................................................................................................................................... 6

2.4 FM demodulator and audio amplifier (mono versions) .................................................................................. 6

2.5 Video switch ................................................................................................................................................... 6

2.6 Synchronisation circuit .........................................................................................................................................6

2.7 Chroma and luminance processing ................................................................................................................ 7

2.8 RGB output circuit .......................................................................................................................................... 7

2.9 µ-Controller .................................................................................................................................................... 8

2.9.1 Controls .............................................................................................................................................. 8

2.9 .2 Teletext ............................................................................................................................................. 8

2.10 Video Path ..................................................................................................................................................... 9

2.11 Sound Path .................................................................................................................................................. 9

2.12 AV Input Signal Path ..................................................................................................................................... 9

2.12.1 Video and Sound ............................................................................................................................ 9

2.12.2 RGB ................................................................................................................................................ 9

3. TUNER ....................................................................................................................................................................... 9

4. DIGITAL TV SOUND PROCESSOR MSP34X0 ........................................................................................................ 10

5. SOUND OUTPUT STAGE TDA7266L/TDA7266 ...................................................................................................... 10

6. VERTICAL OUTPUT STAGE WITH TDA8174A ....................................................................................................... 10

7. VIDEO OUTPUT AMPLIFIER TDA6107 ................................................................................................................... 11

8. POWER SUPPLY (SMPS) .......................................................................................................................................... 11

8.1 Start Up ......................................................................................................................................................... 11

8.2 Voltage Regulation .......................................................................................................................................... 11

8.3 Voltage Protection .......................................................................................................................................... 11

8.4 Current Regulation .......................................................................................................................................... 11

8.5 Standby operation .......................................................................................................................................... 12

8.6 Mode transition ............................................................................................................................................. 12

8.7 SMPS Switch Off .......................................................................................................................................... 12

9. LINE CIRCUIT ............................................................................................................................................................ 12

9.1 B.C.L. Circuit (Beam Current Limiter) ........................................................................................................... 13

10. SERIAL ACCESS CMOS 8K EEPROM 24C08 ...................................................................................................... 13

11. SAW FILTERS .......................................................................................................................................................... 13

12. IC DESCRIPTIONS AND INTERNAL BLOCK DIAGRAM ..................................................................................... 13

ST92195 ................................................................................................................................................................ 14

STV224X ............................................................................................................................................................... 15

UV1315, UV1316, UV1336 .................................................................................................................................. 15

TDA7266/TDA7266L .......................................................................................................................................... 17

TDA8174 ..................................................................................................................................................................18

TDA6107 ................................................................................................................................................................ 18

MC44608 .................................................................................................................................................................19

MSP34X0G ..............................................................................................................................................................19

24C08 .................................................................................................................................................................... 20

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TDA1308 ................................................................................................................................................................ 21

SAW FILTERS ....................................................................................................................................................... 21

13. GENERAL BLOCK DIAGRAM of 11AK44 ..................................................................................................................22

14. SERVICE MENU ...................................................................................................................................................... 23

14.1 Service Menu entrance ................................................................................................................................ 23

14.2 Service Adjustments ................................................................................................................................... 23

14.3 Using Coloured Buttons .............................................................................................................................. 24

14.3.1 AVL ............................................................................................................................................... 24

14.3.2 Geometry Menu ............................................................................................................................. 25

14.3.2.1 Geometry Table ................................................................................................................ 25

14.3.3 Screen Adjustment ...................................................................................................................... 26

14.3.4 IF Adjustment ................................................................................................................................ 26

14.4 Auto Programming System Set Up ............................................................................................................. 25

15. OPTIONS ................................................................................................................................................................... 27

15.1 Service Registers updating regarding the Tuner ...................................................................................... 27

15.2 Registers details ......................................................................................................................................... 28

16. LANGUAGES ......................................................................................................................................................... 30

17. HOTEL MODE FUNCTIONS ................................................................................................................................... 30

18. SCHEMATIC DIAGRAMS ........................................................................................................................................ 31

19. HOW TO UPDATE THE TECHNICAL INFORMATION ........................................................................................ 41

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SAFETY PRECAUTIONS

The service of this TV set must be carried out by qualified persons only. Components marked with the warning symbol on the circuit diagram or on the Parts Listing, are critical for safety and must only be replaced with an identical component.

- Power resistor and fused resistors must be mounted in an identical manner to the original component.

- When servicing this TV, check that the EHT does not exceed 26kV.

TV set switched off:

Make short-circuit between HV-CRT clip and CRT ground layer. Short C809 before changing IC800 and IC801 or other components in primary side of the SMPS part.

Do not try to test Q801 gate source junction if C809 is charged, your meter will turn on the transistor which will discharge the capacitor resulting in a drain source short circuit. Do not discharge C809 quickly with a screwdriver etc. The very high current produced can damage the internal connections of the capacitor causing failure at a later date. Remember when checking voltages to use a return path on the same side of TR802 for the Voltmeter earth to obtain the correct readings.

Measurements: Voltage readings and oscilloscope traces are measured under the following conditions: Antenna signal’s level is 60dB at the color bar pattern from the TV pattern generator. (100% white, 75% color saturation) Brightness, contrast, and color are adjusted for normal picture performance. Mains supply, 220VAC, 50Hz.

DO NOT CHANGE ANY MODULE UNLESS THE SET IS SWITCHED OFF

The mains supply part of the switch mode power supply’s transformer is live. Use an isolating transformer. The receiver complies with the safety requirements.

PERI-TV SOCKET

SCART PINING

1 Audio right output 0.5 Vrms / 1K 2 Audio right input 0.5 Vrms / 10K 3 Audio left output 0.5 Vrms / 1K 4 Ground AF 5 Ground Blue 6 Audio left input 0.5 Vrms / 10K 7 Blue input 0.7 Vpp / 75 ohm 8 AV switching input 0-12 VDC / 10 K 9 Ground Green 10 11 Green input 0.7 Vpp / 75 ohm 12 13 Ground Red 14 Ground Blanking 15 Red input 0.7 Vpp / 75 ohm 16 Blanking input 0-0.4 VDC, 1-3 VDC / 75 Ohm 17 Ground CVBS output

18 Ground CVBS input 19 CVBS output 1 Vpp / 75 ohm 20 CVBS input 1 Vpp / 75 ohm 21 Ground

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1. INTRODUCTION

11AK44 is a 90° chassis capable of driving 20"/21" tubes at the appropriate currents. The chassis is capable of operating in PAL, SECAM and NTSC standards. The sound system is capable of giving 4 watts RMS output into a load of 16 ohms. 7 page SIMPLETEXT is provided. The chassis is equipped with a single-deck 21 pin Scart connector.

CIRCUIT DESCRIPTIONS

2. SMALL SIGNAL PART WITH STV2248

STV2248 video processor is essential for realizing all small signal functions for a color TV receiver.

2.1 Vision IF amplifier

The vision IF amplifier can demodulate signals with positive and negative modulation. The PLL demodulator is completely alignment-free. Although the VCO (Toko-coil) of the PLL circuit is external, yet the frequency is fixed to the required value by the original manufacturer thus the Toko-coil does not need to be adjusted manually. The setting of the various frequencies (38.9 or 33,8 MHz) can be made via changing the coil itself.

2.2 QSS Sound circuit (QSS versions)

The sound IF amplifier is similar to the vision IF amplifier and has an external AGC de-coupling capacitor. The single reference QSS mixer is realised by a multiplier. In this multiplier the SIF signal is converted to the inter-carrier 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. The AM sound demodulator is realised by a multiplier. The modulated sound IF signal is multiplied in phase with the limited SIF signal. The demodulator output signal is supplied to the output via a low-pass filter for attenuation of the carrier harmonics. The AM signal is supplied to the output via the volume control.

2.3 AM Demodulator

The AM demodulated signal results from multiplying the input signal by itself, it is available on AM/FM output.

2.4 FM demodulator and audio amplifier (mono versions)

The FM demodulator is realized as narrow-band PLL with external loop filter, which provides the necessary selectivity without using an external band-pass filter. To obtain a good selectivity a linear phase detector and constant input signal amplitude are required. For this reason the inter-carrier signal is internally supplied to the demodulator via a gain controlled amplifier and AGC circuit. The nominal frequency of the demodulator is tuned to the required frequency (4.5/

5.5/6.0/6.5 MHz) by means of a calibration circuit that uses the clock frequency of the µ-controller/Teletext decoder as a reference. The setting to the wanted frequency is realized by means of the software. It can be read whether the PLL frequency is inside or outside the window and whether the PLL is in lock or not. With this information it is possible to make an automatic search system for the incoming sound frequency. This is realized by means of a software loop that alternate the demodulator to various frequencies, then select the frequency on which a lock condition has been found. De-emphasis output signal amplitude is independent of the TV standard and has the same value for a frequency deviation of ±25 kHz at the 4.5 MHz standard and for a deviation of ±50 kHz for the other standards. When the IF circuit is switched to positive modulation the internal signal on deemphasis pin is automatically muted. The audio control circuit contains an audio switch and volume control. In the mono inter-carrier sound versions the Automatic Volume Leveling (AVL) function can be activated. The pin to which the external capacitor has to be connected depends on the IC version. For the 90° types the capacitor is connected to the EW output pin (pin 20). When the AVL is active it automatically stabilizes the audio output signal to a certain level.

2.5 Video switching

The video processor (STV2248C) has three CVBS inputs and two RGB inputs. The first CVBS input is used for external CVBS from SCART 1, the second is used for external CVBS from FAV, and the third one is used for internal video. The selection between both external video inputs signals is realized by means of software and hardware switches.

2.6 Synchronization circuit

The video processor (STV224X) performs the horizontal and vertical processing. The external horizontal deflection circuit is controlled via the Horizontal output pulse (HOUT). The vertical scanning is performed through an external ramp generator and a vertical power amplifier IC controlled by the Vertical output pulse (VOUT). The main components of the deflection circuit are:

• PLL1: the first phase locked loop that locks the internal line frequency reference on the CVBS input signal. It is

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CHASSIS

composed of an integrated VCO (12 MHz) that requires the chroma Reference frequency (4.43 MHz or 3.58 MHz crystal oscillator reference signal), a divider by 768, a line decoder, and a phase comparator.

• PLL2: The second phase locked loop that controls the phase of the horizontal output (Compensation of horizontal deflection transistor storage time variation). Also the horizontal position adjustment is also performed in PLL2.

• A vertical pulse extractor.

• A vertical countdown system to generate all vertical windows (vertical synchronization window, frame blanking pulses, 50/60 Hz identification window...).

• Automatic identification of 50/60 Hz scanning.

• PLL1 time constant control.

• Noise detector, video identification circuits, and horizontal coincidence detector.

• Vertical output stage including de-interlace function, vertical position control.

• Vertical amplitude control voltage output (combined with chroma reference output and Xtal 1 indication).

2.7 Chroma and luminance processing

The chroma decoder is able to demodulate PAL, NTSC and SECAM signals. The decoder dedicated to PAL and NTSC sub-carrier is based on a synchronous demodulator, and an Xtal PLL locked on the phase reference signal (burst). The SECAM demodulation is based on a PLL with automatic calibration loop. The color standard identification is based on the burst recognition. Automatic and forced modes can be selected through the I2C bus. NTSC tint, and auto flesh are controlled through I2C bus. Xtal PLL can handle up to 3 crystals to work in PAL M, PAL N and NTSC M for South America. ACC an ACC overload control the chroma sub-carrier amplitude within 26dB range. Both ACCs are based on digital systems and do not need external capacitor. All chroma filters are fully integrated and tuned via a PLL locked on Xtal VCO signal. A second PLL is used for accurate fine-tuning of the SECAM bell filter. This tuning is achieved during the frame blanking. An external capacitor memorizes the bell filter tuning voltage. A base-band chroma delay-line rebuilds the missing color line in SECAM and removes transmission phase errors in PAL. The base-band chroma delay line is clocked with 6 MHz signal provided by the horizontal scanning VCO. The luminance processor is composed of a chroma trap filter, a luminance delay line, a peaking function with noise coring feature, a black stretch circuit. Trap filter and luminance delay lines are achieved with the use of bi-quad integrated filters, autoaligned via a master filter phase locked loop.

2.8 RGB output circuit

The video processor performs the R, G, B processing. There are three sources:

1. Y, U, V inputs (coming from luma part (Y output), and chroma decoder outputs (R-Y, B-Y outputs).

2. External R, G, B inputs from SCART (converted internally in Y, U, V), with also the possibility to input YUV signals from a DVD player, (YUV specification is Y= 0.7 V PP , U= 0.7 V PP , V = 0.7 V PP for 100% color bar).

3. Internal R, G, B inputs (for OSD and Teletext display)

The main functions of the video part are:

- Y, U, V inputs with integrated clamp loop, allowing a DC link with YUV outputs,

- External RGB inputs (RGB to YUV conversion), or direct YUV inputs,

- Y, U, V switches,

- Contrast, saturation, brightness controls,

- YUV to RGB matrix,

- OSD RGB input stages (with contrast control),

- RGB switches,

- APR function,

- DC adjustment of red and green channels,

- Drive adjustments (R, G, B gain),

- Digital automatic cut-off loop control,

- Manual cut-off capability with I2C adjustments,

- Half tone, oversize blanking, external insertion detection, blue screen,

- Blanking control and RGB output stages.

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2.9 µ-Controller

The ST92195 is the micro-controller, which is required for a color TV receiver. ST92195D1 is the version with one page Teletext and ST92195D7 is the one with 7 page Teletext. The IC has the supply voltage of 5 V and they are mounted in PSDIP package with 56 pins.

µ-Controller has the following features

- Display of the program number, channel number, TV Standard, analogue values, sleep timer, parental control and mute is done by OSD

- Single LED for stand-by and on mode indication

- System configuration with service mode

- 3 level logic output for SECAM and Tuner band switching

IC 501 controls all the functions of the receiver operated by the remote control and the front panel customer controls. It produces the on screen graphics, operates tuning, customers controls and engineering controls, and also incorporates all of the Teletext functions. It also controls the video processor, the audio processor, and the tuner. The circuits just mentioned are controlled via the I²C bus. Also IC501 controls the video source switching, vertical position adjustment and the vertical linearity adjustment via its ports. An external 8K EEPROM is used by the micro. The EEPROM comes fully programmed. The main clock oscillator is 4.0 MHz crystal X501 on pins 50 and 51. Reset is provided on pin 2 via Q504. On switching on pin 2 becomes high and the controller gets reset which stays valid till a low signal comes on that pin.

2.9.1 Controls

Command information from the infrared remote controller is fed through the sensor IC502 to pin 1 of the microprocessor. Operation of the customer front panel keys is detected by pin 8 that is an ADC (analogue to digital converter). Pressing a switch will connect the 5V to the ground through a particular resistor that determines the value of the voltage on pin8 at that instant. This obtained value is comprehended by the micro and the corresponding operation is performed. Refer to the following table:

Button Theoretical voltage Resistance

P+ 3.0V R502

P- 4.0V R503

V+ 2.0V R504

V- 1.5V R506

Menu 1.0V R505

IC501 automatically switches from TV mode to AV1 by detecting the signal from or pin8 at the Scart connector, through it 56 pins. The picture mode is determined according to the following table:

Direct Voltage Picture mode

0 ~ 2 V TV

4,5 ~ 7 V 16 :9

9,5 ~ 12 V 4 :3

2.9.2 Teletext

The microprocessor IC501 performs all of the Teletext functions internally. The Composite blanking video and Sync signal (CBVS) is input to pin 33 of the micro from pin 29 of IC403. When text is selected the text graphics are output as R.G.B signals on pins 15/16/17 of the micro and fed to pins 34/35/36 of IC403. At the same time pin 18 of the micro goes high taking pin 37 of IC403 high, blanking the picture and selecting text R.G.B. input. Note: mixed mode is available and fast text with 8-page memory.

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2.10 Video Path

The detected video signal is output from pins 18 of IC403, to sound traps Z403/404. The video is taken from the other side via the appropriate filter to Pin 18 of IC403. (1.2 p to p) Video to the Scart connectors is taken after R458 to Pin 19 of the Scart connector. The CVBS_TXT output Pin29 output is fed to IC501 Pin 34 (for Teletext). The video signal is sometimes labelled CVBS on the circuit diagram. This stands for Composite Video Blanking & Sync. The composite signal is input Pin 13 (Video input) of IC403. This IC carries out all of the luma/Chroma processing internally and also provides the customer control functions of brightness, contrast, sharpness and saturation. IC403 is I²C bus controlled and incorporates auto greyscale circuitry and internal luma/chroma delay lines. The resulting R.G.B drive is output on pins 30,31 and 32. The R.G.B passes via connector PL405 to the CRT base PCB. Here the R.G.B signal is amplified by IC901 to provide drive for the cathodes of the CRT. IC901 produces a feedback signal, which is fed to IC403 (pin 33) for blanking and auto greyscale correction.

2.11 Sound Path

The demodulated mono sound is taken from pin 55 of IC403 directly to the sound output stage IC401 Pin 7. The output signal from IC401 is Volume controlled achieved within IC403 using the I²C bus line from IC501. To limit the volume at the specified out put the A_out pin 55 is fed to IC 401 through a voltage divider R455 and R454. Muting of the output stage is provided from Pin 46 of IC501 to pin3 of IC401/6 of IC301. IN the stereo model the IF from PINS 10 & 11 of the tuner passes through Z401 and the output signal goes through pins 1&2 of IC403. The output QSS signal from IC 403 is taken from pin 11 and sent to audio processor IC700. The left channel is output on PIN 29 and the right channel output is on PIN 28. Then to IC301 after passing through a voltage divider R454/R455 for the right channel and R463/R464 for the left channel. IC403 handles also the AM modulated signals in L/L’ systems at pins 1&2.

2.12 AV Input Signal Path

2.12.1 Video and Sound

IC403 has three CVBS inputs at pins 18,20 and 22.The composite video signal of AV1 is taken from pin 20 of the Scart connector to pin 20 of IC403. The mono sound signal is taken from pins 2 and 6 of the Scart sockets to the switching transistors Q101. The transistor switches the audio depending on the source, and is then fed to pin14 of lC403. When AV input is selected pin 5,6,7 of the microprocessor IC50I is taken high, this switches the IC403 to external input mode via I²C BUS. This connects the video inputs on pins 20 or 22 to IC403 and the audio input on pin 14 to the audio out on pin 55 (via the internal volume control circuit) The signal paths are then as for videopath. The chassis can detect the video signals on Scart using pin 8 switching voltage at pin 56 of IC501.

2.12.2 R.G.B

The R.G.B signals from pins 7,11 and 15 of the Scart connector are fed to the R.G.B input pins (25,26,27) of IC403. R.G.B operation can be enabled by either taking pin 16 of the Scart connector high, this high is fed to Pin 28 of IC403, or via the l²C bus the microprocessor sets IC403 to forced R.G.B mode in which the video processor generates its own fast blank signal. This puts the IC into external R.G.B mode and selects the inputs on pins 25,26 and 27, overriding the video input on pin 20/22. Note: when using R.G.B input the contrast, brightness and colour controls will still operate.

3. TUNER

Either a PLL or a VST tuner is used as a tuner. UV1316 (VHF/UHF) is used as a PLL tuner. For only PALM/N, NTSC M applications UV 1336 is used as the PLL tuner. UV 1315 (VHF/UHF) is used as a VST Tuner.

Channel coverage of UV1316

CHANNELS

Low Band E2 to C 48.25 to 82.25

Mid Band E5 to E12 175.25 to 224.25 S09 to S38 161.25 to 439.25

High Band E21 to E69 471.25 to 855.25

(1). Enough margin is available to tune down to 45.25 MHz.

OFF-AIR CHANNELS CABLE CHANNELS

FREQUENCY FREQUENCY BAND

RANGE (MHz)

(1)

(2)

CHANNELS

S01 to S08 69.25 to 154.25

S39 to S41 447.25 to 463.25

RANGE (MHz)

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(2). Enough margin is available to tune up to 863.25 MHz.

Noise Typical Max. Gain Min. Typical Max.

Low band: 5 dB 9 dB All channels: 38 dB 44 dB 52 dB Mid band: 5dB 9 dB Gain Taper (of-air channels): 8 dB

High band: 6 dB 9 dB

Channel Coverage UV1336

BAND CHANNELS FREQUENCY

RANGE (MHz)

Low Band 2 to D 55.25 to 139.25

Mid Band E to PP 145.25 to 391.25

High Band QQ to 69 397.25 to 801.25

Noise is typically 6 dB for all channels. Gain is minimum 38 dB and maximum 50 dB for all channels.

Channel Coverage of UV1315

OFF-AIR CHANNELS CABLE CHANNELS

BAND

Noise Typ. Max. Gain Min. Typ. Max. Low band 6 dB 9 dB All Channels 38 dB 44 dB 50 dB Mid band 6 dB 10 dB Gain Taper 8 dB High band 6 dB 11 dB (off-air channels)

Low Band E2 to C 48.25 to 82.25

Mid Band E5 to E12 175.25 to 224.25 S11 to S39 231.25 to 447.25

High Band E21 to E69 471.25 to 855.25

(1). Enough margin is available to tune down to 45.25 MHz. (2). Enough margin is available to tune up to 863.25 MHz.

CHANNELS

FREQUENCY FREQUENCY

RANGE (MHz)

(1)

(2)

CHANNELS

S01 to S10 69.25 to 168.25

S40 to S41 455.25 to 463.25

RANGE (MHz)

4. DIGITAL TV SOUND PROCESSOR MSP34X0

The MSP 34x0G is designed to perform demodulation of FM or AM-Mono TV sound. Alternatively, two-carrier FM systems according to the German or Korean terrestrial specs or the satellite specs can be processed with the MSP 34x0G. Only the MSP 3410 does digital demodulation and decoding of NICAM-coded TV stereo sound. The MSP 34x0G offers a powerful feature to calculate the carrier field strength which can be used for automatic standard detection (terrestrial) and search algorithms (satellite).

5. SOUND OUTPUT STAGE TDA7266L/TDA7266

TDA7266L is used as the AF output amplifier for mono applications. It is supplied by +12 VDC coming from a separate winding in the SMPS transformer. An output power of 4 W (THD = 0.5 %) can be delivered into an 16 ohm load. TDA7266 is used as the AF output amplifier for stereo applications. It is supplied by +12 VDC coming from a separate winding in the SMPS transformer. An output power of 2*4W (THD = 0.5 %) can be delivered into an 16 ohm load.

6. VERTICAL OUTPUT STAGE WITH TDA8174A

The TDA8174A is a power amplifier circuit for use in 90° and 110° color deflection systems for 25 to 200 Hz field frequencies, and for 4 : 3 and 16 : 9 picture tubes. IC403 generates a vertical pulse signal VER_OUT and V_AMP that are fed to IC600 (the vertical stage IC). IC600 is supplied by a 26V DC via diode D610. It generates its own ramp signal and based on the V_AMP & VER_OUT signals it produces the vertical deflection signals that are fed to connector PL601. Vertical linearity adjustment is controlled by Q604, which is driven by the PWM output of IC501 at pin 49. Vertical position adjustment is conducted by Q606 derived by the VER_OUT signal. Switching Q606 will change the DC voltage on VOUT_2 pin, which will either lower or higher the picture. A DC level is supplied at VOUT_2 via D614 to stabilise the picture and make its position changeable.

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7. VIDEO OUTPUT AMPLIFIER TDA6107JF/N3

The TDA6107JF includes three video output amplifiers and is intended to drive the three cathodes of a colour CRT directly. The device is contained in a plastic DIL-bent-SIL 9-pin medium power (DBS9MPF) package, and uses highvoltage DMOS technology. To obtain maximum performance, the amplifier should be used with black-current control.

8. POWER SUPPLY (SMPS)

The DC voltage required at various parts of the chassis are provided by an SMPS transformer controlled by the IC MC44608 which is designed for driving, controlling and protecting switching transistor of SMPS. The transformer produces

126 V (Flat models) or 116 V (non Flat models) for FBT input, +/- 14 V for audio output IC, S + 3.3, S + 5 V and 8 V for

ST92195.

The ZX series of receivers incorporate a Motorola switch mode power supply using a MC 44608 regulator controller IC. The circuit provides power to the receiver in both standby and normal operation modes.

8.1 Start Up

The switch on the mains supply is fed through the mains filter network TR801, the surge limiter resistor R828, the bridge rectifier diodes D811/13/37/38, and reservoir capacitor producing approx. 320 volts D.C. to feed the switching MOSFET Q801 via the primary winding of TR802 pins 6 and 7. Start up resistor R801 feeds from a 500V coming from the mains through the adder diodes D809, D890 to pin 8 of IC800, the IC uses 9mA current source and connects it internally to VCC at pin6 allowing a rapid charge enough for start up. Then IC800 responds with the oscillator starting to oscillate at a 40 KHz frequency fixed by the IC manufacturer. The IC then produces, pulse width modulation pulses, at this frequency on pin 5 to drive the base of the switching FET Q801, that will then switch current on and off through the primary of TR802, which will in turn provides voltages in the secondary windings. The secondary winding voltages being proportional to the length of time that Q801 is turned on in each cycle. The voltage produced between pins 4 and 3 of TR802 is rectified by D804 developing aprox. 12 volts on C810, which takes over from the start up resistor to supply pin 8 of IC800. The Demag pin at pin1 offers 3 different functions: Zero voltage crossing detection (50mV), 24mA current detection and 120mA current detection. The 24mA level is used to detect the secondary reconfiguration status and the 120mA level to detect an Over Voltage status called Quick OVP. The VCC at pin6 operates between 6,6V and 13V in normal operation, when this voltage exceeds 15V then the IC output is disabled.

8.2 Voltage Regulation

After initial start up the secondary voltages of TR802 are established. These voltages then need to be regulated to the required levels. In a switch mode power supply such as this, it is the ON time of the switching FET Q801 that determines the output voltages produced. To provide regulation of the supply there is a feedback loop via an adjustable zener IC118 and an OPTO- coupler connected to pin3 of IC800. The reference voltage of IC118 is set to 2,5V to supply a B+ voltage of 115V. Any fluctuation at this pin will cause IC800 to compensate it either by increasing or decreasing the voltage at the secondary outputs.

8.3 Voltage Protection

The MC44608 offers two OVP functions: 1- A fixed function that detects when V CC is higher than 15.4V 2- A programmable function that uses the demag pin. The current flowing into the demag pin is mirrored and compared to the reference current Iovp (120mA). -Thus this OVP is quicker than normal number one as it directly senses the change in current rather than waiting for a specific voltage value, and is called QOVP. In both cases, once an OVP condition is detected, the output is latched off until a new circuit START–UP. 3- A software controlled function acts on pin52 of IC501. This pin monitors feedback from both 8V and 5V via D512, then compares these to a reference value Vref pre-set by the hardware through resistors R545, R546, R548. In normal mode operation 1.2V < Vref < 2.4V. Any voltage outside this window will cause the micro controller to force the TV to stand by mode by lowering the standby port. Refer to standby mode.

8.4 Current Protection

To monitor the current drawn by the receiver the source of Q801 is returned to the bridge rectifier through a low value resistor R807. All the current drawn by the receiver will flow through that resistor each time Q801 conducts; this will produce a voltage across the resistors proportional to the current drawn by the receiver. This voltage is fed to pin 2 of IC800 via R806. When the receiver is working normally the voltage across R807 is only a fraction of a volt and is not large enough to have any effect on IC800. Under fault conditions, if the receiver draws excessive current the voltage across R807 will rise. This voltage is monitored by the current sense input pin2.

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This Current Sense pin senses the voltage developed on the series resistor R806 inserted in the source of the power MOSFET. When I sense reaches 1V, the Driver output (pin 5) is disabled. This is known as the Over Current Protection function. A 200mA current source is flowing out of the pin 3 during the start–up phase and during the switching phase in case of the Pulsed Mode of operation. A resistor can be inserted between the sense resistor and the pin 3, thus a programmable peak current detection can be performed during the SMPS stand–by mode.

8.5 Standby Operation

As mentioned earlier the Start–up Management of MC44608 is as follows: The Vi pin 8 of IC800 is directly connected to the HV DC rail Vin. This high voltage current source is internally connected to the VCC pin and thus issued to charge the VCC capacitor. The V CC capacitor charge period corresponds to the Start–up phase. When the V CC voltage reaches 13V, the high voltage 9mA current source is disabled and the device starts working. The device enters into the switching phase. To help increase the application safety against high voltage spike on pin8 a small wattage 1k _ series resistor is inserted between the Vin rail and pin 8. After this start-up the IC can distinguish between the different modes of operation using the following technique:

8.6 Mode Transition

The LW latch is the memory of the working status at the end of every switching sequence. Two different cases must be considered for the logic at the termination of the SWITCHING PHASE:

1. No Over Current was observed

2. An Over Current was observed These two cases correspond to the two signals “NOC” in case of “No Over Current” and “OC” in case of Over Current. The effective working status at the end of the ON time memorized in LW corresponds to Q=1 for no over current, and Q=0 for over current. To enter the standby mode secondary side is reconfigured using D889 loop, this starts with the microprocessor ‘s pin 47 becomes high; as the standby port becomes high Q503 conducts and Q802 becomes off then D889 conducts and the high voltage output value becomes lower than the NORMAL mode regulated value. The shunt regulator IC118 is fully OFF. In the SMPS stand–by mode all the SMPS outputs are lowered except for the low voltage output that supply the wake–up circuit located at the isolated side of the power supply. In that mode the secondary regulation is performed by the Zener diode (D801) connected in parallel to the TL431. The secondary reconfiguration status can be detected on the SMPS primary side by measuring the voltage level at pin4 of TR802. In the SMPS stand–by mode the 3 distinct phases are: The SWITCHING PHASE: Similar to the Overload mode. The current sense clamping level is reduced. When VCC crosses the current sense section, the C.S. clamping level depends on the power to be delivered to the load during the SMPS stand–by mode. Every switching sequence ON/OFF is terminated by an OC as long as the secondary Zener diode voltage has not been reached. When the Zener voltage is reached the ON cycle is terminated by a true PWM action. The proper SWITCHING PHASE termination must correspond to a NOC condition. The LW latch stores this NOC status. The LATCHED OFF PHASE: The MODE latch is set. The START–UP PHASE is similar to the Overload Mode. The MODE latch remains in its set status (Q=1). The SWITCHING PHASE: The Stand-by signal is validated and the 200uA is sourced out of the Current Sense pin 2.

8.7 SMPS Switch Off

When the mains is switched OFF, so long as the electrolytic bulk capacitor provides energy to the SMPS the controller remains in the switching phase. Then the peak current reaches its maximum peak value, the switching frequency decreases and all the secondary voltages are reduced. The V CC voltage is also reduced. When VCC is less than 6,5V, the SMPS stops working

9. LINE CIRCUIT

Line and frame drive are generated by IC403. The sync pulses are separated from the incoming video signal at pin 18/ 20/22 and used to control the internal circuitry of the IC. Line drive is produced by counting down the external 4.43 MHz crystal at pin 40 to 15.625 KHz locked to the incoming sync. This drive is output on pin 48 and feeds directly to the line drive transistor Q601. Note. That the output of IC403 Pin 48 is an open-collector and requires a pull up resistor, if the pin is open circuited for test no waveform will be seen. Q601 collector feeds the line output transistor Q603. The line output stage is conventional with a transformer containing a split diode winding for EHT generation. Fifth harmonic tuning is achieved by capacitor C618/619. A fly-back pulse is taken from pin 1 of the FBT transformer. This is required by IC403 (Pin 49) for burst / sync gating, and RGB line blanking. The ver_sync signal is output from the pin47 and fed to Pin41 of IC501. The H_sync pulse is taken from pin 1 of the FBT and fed to the micro at pin 40. These two signals are required by the micro for graphics timing and also for text.

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9.1 B.C.L Circuit (Beam Current Limiter)

Beam current limiting is employed to protect the circuitry in the receiver, the CRT and to prevent excessive X Ray radiation in fault conditions. The current drawn by the CRT is monitored by the current drawn through the winding of the fly-back transformer that produces the EHT for the CRT anode. The end of the winding (Pin 10) is returned to IC403 Pins 46, the beam current drawn by the CRT passes through Q603 and develops a voltage on the collector proportional to the current (V=IxR). The voltage on the collector will vary depending on the beam current being drawn reducing the brightness and contrast of the picture. If the voltage is sufficiently negative (indicating very high excess beam current) the output will be reduced, reducing the picture brightness and contrast.

10. SERIAL ACCESS CMOS 8K EEPROM 24C08

The 24C08 is a 8 Kbit electrically erasable programmable memory (EEPROM), organized as 4 blocks of 256*08 bits. The memory is compatible with the I²C standard, two wire serial interface which uses a bi-directional data bus and serial clock.

EEPROM Initialisation

If the E²PROM IC500 is replaced it will come fully programmed and therefore it is not necessary to initialise the new device. In some circumstances the E²PROM may become corrupted in use i.e. static discharge or lightning strike. If this happens, it is advised that the E²PROM is replaced.

11. SAW FILTERS

Saw filter type: Model: G1975M: PAL B/G MONO K2966M: PAL SECAM B/G/D/K/I MONO J1981 : PAL-I MONO K2958M: PAL-SECAM B/G-D/K (38) MONO 2962M: PAL-SECAM B/G/D/K/I/L/L’ MONO L9653M: SECAM L/L’ AM MONO (AUDIO IF) G3967M: PAL-SECAM B/G STEREO (VIDEO IF) G9353M: PAL-SECAM B/G STEREO (AUDIO IF) K3958M: PAL-SECAM B/G/D/K/I/L/L’ STEREO (VIDEO IF) K9356M: PAL-SECAM B/G/D/K/I STEREO (AUDIO IF) K9656M: PAL-SECAM B/G/D/K/I/L/L’ STEREO (AUDIO IF) K3958M: PAL I NICAM (VIDEO IF) K9356M: PAL I NICAM (AUDIO IF)

12. IC DESCRIPTIONS AND INTERNAL BLOCK DIAGRAM

ST92195 STV224X TUNER (UV1315, UV1316, UV1336) TDA7266L / TDA7266M TDA8174A TDA6107 MC44608 MSP34X0G 24C08 TDA1308 SAW FILTERS G1975M, K2966M, K2962M, L9653M, G3962M, G9353M, K3958M, K9356M, K9656M, K6263K, K9652M

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ST92195

The ST92195 is a member of the ST9+ family of micro-controllers, completely developed and produced by STMicroelectronics using a proprietary n-well HCMOS process. The nucleus of the ST92195 is the advanced Core, which includes the Central Processing Unit (CPU), the ALU, the Register File and the interrupt controller. The Core has independent memory and register buses to add to the efficiency of the code. A set of on-chip peripherals form a complete system for TV set and VCR applications:

– Voltage Synthesis – VPS/WSS Slicer – Teletext Slicer – Teletext Display RAM – OSD

Additional peripherals include a watchdog timer , a serial peripheral interface (SPI), a 16-bit timer and an A/D converter.

INT7/P2.0

RESET

P0.7 P0.6 P0.5 P0.4 P0.3

AIN4/P0. 2

P0.1 P0.0

CSO/RESET0

SDA1/SDI/SDO/P5.1

SCL1 /SCK /INT 2/P5 .0

/P3.7

P3.6 P3.5 P3.4

JTDO

WSCF

/WSCR

AVDD3

TEST0

MCFM

JTCK

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

18 19 20 21 22 23 24 25 26 27 28

P2.1/INT5/AIN1

P2.2/INT0/AIN2

P2.3/INT6/VS01

P2.4/NMI

P2.5/AIN3/INT4/VS02

OSCIN

OSCOUT

P4.7/PWM7/EXTRG/ST OUT0

P4.6/PWM6

P4.5/PWM5/SDA2

P4.4/PWM4/SCL2

P4.3/PWM3/TSLU/HT

P4.2/PWM2

P4.1/PWM1

P4.0/PWM0

VSYNC

HSYNC/CSYNC

AVDD1

PXFM

38 37

JTRSTO GND

AGND

CVBS1

CVBS2

JTMS

AVDD2

CVBSO

30 29

TXCF

Figure 1. Microcontroller Pin Description

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STV224X Video processor

The STV2246/2247/2248 are fully bus controlled ICs for TV including PIF, SIF, luma, Chroma and deflection processing. Used with a vertical frame booster (TDA1771 or TDA8174 for 90° chassis, STV9306 for 110° chassis), they allow the design of multi-standard sets with very few external components and no manual adjustments.

REFIF

CHR

APR

CCIF

CC2

SIFIN1

SIFIN2

AGCSIFCAP

AGCPIFCAP

PIFIN1

PIFIN2

TUNERAGCOUT

IFP LL

GND

/FMO UT/ SC

INTCVBSOUT

EXTAUDIOIN

PIFLC1

PIFLC2

CVBSIN1

GND2

CVBSIN2

Y/CVBSIN3

BEXT/Cb

GEXT/Y

REXT/Cr

FBEXT

FMC AP

AUDIOOUT

GNDD

CCD

SDA

SCL

SLPF

LFB/SSC

HOUT

VERT

BCL/SAF

CC1

CVBSOUT2

GND1

X1/VAMP/CHROUT

CLPF

XTAL1

XTAL2

XTAL3/BTUN

FBOSD/HC

ROSD

GOSD

BOSD

CATH

ROUT

GOUT

BOUT

NTBC/CVBSOUT1

Figure 2. Pin connections STV224X/8X (SDIP56)

UV1315, UV1316, UV1336

General description of UV1315

The UV1315 tuner belongs to the UV 1300 family of tuners, which are designed to meet a wide range of applications. It is a combined VHF, UHF tuner suitable for CCIR systems B/G, H, L, L’, I and I’.

Features of UV1315

Member of the UV1300 family small sized UHF/VHF tuners Systems CCIR: B/G, H, L, L’, I and I’; OIRT: D/K Voltage synthesized tuning (VST) Off-air channels, S-cable channels and Hyper-band Standardized mechanical dimensions and pinning

Pinning, Pin Value

1. Gain control voltage (AGC): 4.0 V, Max: 4.5 V

2. Tuning voltage

3. High band switch: 5 V, Min: 4.75 V, Max: 5.5 V

4. Mid band switch: 5 V, Min: 4.75 V, Max: 5.5 V

5. Low band switch: 5 V, Min: 4.75 V, Max: 5.5 V

6. Supply voltage: 5 V, Min: 4.75 V, Max: 5.5 V

7. Not connected

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8. Not connected

9. Not connected

10. Symmetrical IF output 1

11. Symmetrical IF output 2

Band switching table:

Pin 3 Pin 4 Pin 5 Low band 0 V 0 V + 5 V Mid band 0 V + 5 V 0 V High band + 5 V 0 V 0 V

General description of UV1316

The UV1316 tuner belongs to the UV 1300 family of tuners, which are designed to meet a wide range of applications. It is a combined VHF, UHF tuner suitable for CCIR systems B/G, H, L, L’, I and I’.

Features of UV1316

Member of the UV1300 family small sized UHF/VHF tuners Systems CCIR: B/G, H, L, L’, I and I’; OIRT: D/K Digitally controlled (PLL) tuning via I²C-bus Off-air channels, S-cable channels and Hyper-band World standardized mechanical dimensions and world standard pinning Complies to “CENELEC EN55020” and “EN55013”

Pinning, Pin Value

1. Gain control voltage (AGC): 4.0 V, Max: 4.5 V

2. Tuning voltage

3. I²C-bus address select: Max: 5.5 V

4. I²C-bus serial clock :Min: -0.3 V, Max: 5.5 V

5. I²C-bus serial data :Min: -0.3 V, Max: 5.5 V

6. Not connected

7. PLL supply voltage: 5.0 V, Min: 4.75 V, Max: 5.5 V

8. ADC input

9. Tuner supply voltage: 33 V, Min: 30 V, Max: 35 V

10. Symmetrical IF output 1

11. Symmetrical IF output 2

General description of UV1336

UV1336 series is developed for reception of channels broadcast in accordance with the M, N standard.

Features of UV1336

Global standard pinning Integrated Mixer-Oscillator & PLL function Conforms to CISPR 13, FCC and DOC (Canada) regulations Low power consumption Both Phono connector and ‘F’ connector are available

Pinning, Pin Value

1. Gain control voltage: 4.0 V, Max: 4.5 V

2. Tuning voltage

3. Address select Max: 5.5 V

4. Serial clock: Min: -0.3 V, Max: 5.5 V

5. Serial data :Min: -0.3 V, Max: 5.5 V

6. Not connected

7. Supply voltage: 5.0 V, Min: 4.75 V, Max: 5.5 V

8. ADC input (optional)

9. Tuning supply voltage: 33 V, Min: 30 V, Max: 35 V

10. Ground

11. IF output

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TDA7266/TDA7266L

General Description of TDA7266L

The TDA7266L is a mono bridge amplifier specially designed for TV and Portable Radio applications. Requires very few external components

WIDE SUPPLY VOLTAGE RANGE (3-18 V) MINIMUM EXTERNAL COMPONENTS. – NO SVR CAPACITOR – NO BOOTSTRAP – NO BOUCHEROT CELLS – INTERNALLY FIXED GAIN STAND-BY & MUTE FUNCTIONS SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION

Pinnig

1 N.C. 2 N.C. 3 MUTE 4 ST-BY 5 PW-GND 6 S-GND 7 IN 8 VCC 9 OUT+ 10 OUT -

General Description of TDA7266

The TDA7266 is a 2x7 Watt dual power amplifier. It is used for sound amplification at stereo TV sets.

WIDE SUPPLY VOLTAGE RANGE (3-18 V) MINIMUM EXTERNAL COMPONENTS – NOSWR CAPACITOR – NOBOOTSTRAP – NO BOUCHEROT CELLS – INTERNALLY FIXED GAIN STAND-BY & MUTE FUNCTIONS SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION

Pinnig

1. OUT1 +

2. OUT1 –

3. VCC

4. IN1

5. N.C.

6. MUTE

7. ST-BY

8. PW-GND

9. S-GND

10. N.C.

11. N.C.

12. IN2

13. VCC

14. OUT2 -

15. OUT2 +

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TDA8174AW

INDEPENDENT VERTICAL AMPLITUDE ADJUSTMENT. BUFFER STAGE. POWER AMPLIFIER. FLYBACK GENERATOR. THERMAL PROTECTION. INTERNAL REFERENCE VOLTAGE DECOUPLING.

General Description

TDA8174A and TDA8174AW are a monolithic integrated circuits. It is a full performance and very efficient vertical deflection circuit intended for direct drive of a TV picture tube in Color and B & W television as well as in Monitor and Data displays.

Pinning

1. POWER OUTPUT

2. OUTPUT STAGE Vs

3. TRIGGER INPUT

4. HEIGHT ADJUSTMENT

5. VOLTAGE REF DECOUPLING

6. GROUND

7. RAMP GENERATOR

8. BUFFER OUTPUT

9. INVERTING INPUT

10. Vs

11. FLYBACK GENERATOR

TDA6107

Features

· Typical bandwidth of 5.5 MHz for an output signal of 60 V (p-p)

· High slew rate of 900 V/ms

· No external components required

· Very simple application

· Single supply voltage of 200 V

· Internal reference voltage of 2.5 V

· Fixed gain of 50

· Black-Current Stabilization (BCS) circuit with voltage window from 1.8 to 6 V and current window from -100 mA to 10 mA

· Thermal protection

· Internal protection against positive flashover discharges appearing on the CRT.

General Description

Pinning, Pin Value

1. BLUE INPUT

2. VCC LOW VOLTAGE

3. GREEN INPUT

4. RED INPUT

5. VDD HIGH VOLTAGE

6. RED CATHODE CURRENT

7. RED OUTPUT

8. GROUND

9. RED FEEDBACK

10. GREEN OUTPUT

11. GREEN CATHODE CURRENT

12. GREEN FEEDBACK

13. BLUE OUTPUT

14. BLUE CATHODE

15. BLUE FEEDBACK

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MC44608

General description

The MC44608 is a high performance voltage-mode controller designed for off–line converters. This high voltage circuit that integrates the start–up current source and the oscillator capacitor, requires few external components while offering a high flexibility and reliability. The device also features a very high efficiency stand–by management consisting of an effective Pulsed Mode operation. This technique enables the reduction of the stand–by power consumption to approximately 1 W while delivering 300 mW in a 150 W SMPS.

• Integrated start–up current source

• Loss less off–line start–up

• Direct off–line operation

• Fast start–up

General Features

• Flexibility

• Duty cycle control

• On chip oscillator switching frequency 40, or 75 KHz

• Secondary control with few external components

Protections

• Maximum duty cycle limitation

• Cycle by cycle current limitation

• Demagnetization (Zero current detection) protection

• “Over V CC protection” against open loop

• Programmable low inertia over voltage protection against open loop

• Internal thermal protection

GreenLine Controller

• Pulsed mode techniques for a very high efficiency low power mode

• Lossless start-up

• Low dV/dT for low EMI radiation

Pinning, Pin Value

1. Demagnetization Zero cross detection voltage: 50 mV typ.

2. I Sense Over current protection voltage 1 V typ.

3. Control Input Min: 7.5 V Max.: 18 V

4. Ground Iout 2 Ap-p during scan 1.2 Ap-p during flyback

5. Driver Output resistor 8.5 Ohm sink 15 Ohm source typ.

6. Supply voltage Max: 16 V (Operating range 6.6 V - 13 V)

7. No connection

8. Line Voltage Min: 50 V Max: 500 V

MSP34X0G

The MSP 34x0G family of single-chip Multistandard Sound Processors covers the sound processing of all analog TVStandards worldwide, as well as the NICAM digital sound standards. The full TV sound processing, starting with analog sound IF signal-in, down to processed analog AF-out, is performed on a single chip. Figure 3 shows a simplified functional block diagram of the MSP 34x0G. This new generation of TV sound processing ICs now includes versions for processing the multichannel television sound (MTS) signal conforming to the standard recommended by the Broadcast Television Systems Committee (BTSC). The DBX noise reduction, or alternatively, Micronas Noise Reduction (MNR) is performed alignment free. Other processed standards are the Japanese FM-FM multiplex standard (EIA-J) and the FM Stereo Radio standard. Current ICs have to perform adjustment procedures in order to achieve good stereo separation for BTSC and EIA-J. The MSP 34x0G has optimum stereo performance without any adjustments. All MSP 34xxG versions are pin compatible to the MSP 34xxD. Only minor modifications are necessary to adapt a MSP 34xxD controlling software to the MSP 34xxG. The MSP 34x0G further simplifies controlling software. Standard selection requires a single I2C transmission only. The MSP 34x0G has built-in automatic functions: The IC is able to detect the actual sound standard automatically (Automatic Standard Detection).

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Furthermore, pilot levels and identification signals can be evaluated internally with subsequent switching between mono/ stereo/bilingual; no I2C interaction is necessary (Automatic Sound Selection). The MSP 34x0G can handle very high FM deviations even in conjunction with NICAM processing. This is especially important for the introduction of NICAM in China. The ICs are produced in submicron CMOS technology.

Loudspeaker

Subwoofer

Headphone

I2S

SCART1

SCART2

Sound IF1

Sound IF2

I2S1

I2S2

SCART1

SCART2

SCART3

SCART4

MONO

ADC

SCART

DSP

Input

Select

De-

modulator

ADC

Pre-

processing

Prescale

Source Select

Loud-

speaker

Sound

Processing

Headphone

Sound

Processing

DAC

SCART Output

Select

Figure 3. Simplified functional block diagram of the MSP 34x0G.

24C08

General description

The 24C08 is a 8 Kbit electrically erasable programmable memory (EEPROM), organized as 4 blocks of 256 * 08 bits. The memory operates with a power supply value as low as 2.5 V.

Features

Minimum 1 million ERASE / WRITE cycles with over 10 years data retention Single supply voltage: 4.5 to 5.5 V Two wire serial interface, fully I²C-bus compatible Byte and Multi-byte write (up to 8 bytes) Page write (up to 16 bytes) Byte, random and sequential read modes Self timed programming cycle

Pinning, Pin Value

1. Write protect enable: 0 V

2. Not connected: 0 V

3. Chip enable input: 0 V

4. Ground: 0 V

5. Serial data address input/output: Input LOW voltage: Min: -0.3 V, Max: 0.3 * Vcc: Input HIGH voltage: Min:

0.7* Vcc, Max: Vcc+1

6. Serial clock: Input LOW voltage: Min: -0.3 V, Max: 0.3 * Vcc: Input HIGH voltage: Min: 0.7 * Vcc, Max: Vcc+1

7. Multibyte/Page write mode: Input LOW voltage: Min: -0.3 V, Max: 0.5 V: Input HIGH voltage: Min: Vcc - 0.5, Max: Vcc + 1

8. Supply voltage: Min: 2.5 V, Max: 5.5 V

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TDA1308

Features

Wide temperature range Excellent power supply ripple rejection Low power consumption Short-circuit resistant High performance high signal-to-noise ratio low distortion

Pinning, Pin Value

1. Output A (Voltage swing): Min: 0.75 V, Max: 4.25 V

2. Inverting input A: Vo (clip): Min: 1400 mVrms

3. Non-inverting input A: 2.5 V

4. Ground: 0 V

5. Non-inverting input B: 2.5 V

6. Inverting input B: Vo (clip): Min: 1400 mVrms

7. Output B (Voltage swing): Min: 0.75 V, Max: 4.25 V

8. Positive supply: 5 V, Min: 3.0 V, Max: 7.0 V

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Saw filter’s list

VIDEO AUDIO

MONO

VIDEO AUDIO

Pinning

1. Input

2. Input-ground

3. Chip carrier-ground

4. Output

5. Output

STR

PAL BG G1975M

PSBG DK K2966M

PAL II' J1981

PSBGDKK' II' K2966M

PSBGDKK' LL' K2962M L9653

PAL BG G3967M G9353M

PAL II' K3958M K9356

PSBGDKK' II' K3958M K9356

PSBGDKK' LL' K3958M K9656

K9656M, L9653M

Pinnig

1. Input

2. Switching Input

3. Chip carrier-ground

4. Output

5. Output

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CHASSIS

13. GENERAL BLOCK DIAGRAM of 11AK44

CRT

AU.

AMP

FBT

RGB

HP. AMP.

TDA1308

MONO

QSS

MSP 34X0G

STEREO SOUND

L R

GENERAL BLOCK DIAGRAM of 11AK44

AMP

VER

AMP

STV2248C

VIDEO

PROCESSOR

HORIZONTAL

DRIVE

BU808DF

TDA8174AW

VIDEO

SWITCHING CIRCUITS

TDA7266/7266L

PLL/VST TUNER

UV1315/1316

SERVICE

NVM

ST92195

MICRO

CONTROLLER

TDA6107

KEYPAD

IR SENSOR

115V

SMPS

AUD.

+12V

+8V

St-by

+5V

44608

SCART1 FAV

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14. SERVICE MENU

14.1 Service Menu entrance

All system, geometry and white balance alignments are performed in Service Mode. Before starting the service mode alignments, make sure that all manual adjustments are done correctly.

To enter the service mode:

1. Press the MENU (30) button on the remote control gun. See figure 5.

2. Press digit keys 4, 7, 2 and 5 consecutively.

When the Service Mode is entered the following On Screen Display appears (figure 4):

Figure 4. Service Mode Figure 5. Remote Control

To adjust the different registers:

1. Use the CURSOR UP (2) / DOWN (31) buttons to move between the registers. See the above right figure.

2. Use the CURSOR LEFT (32) / RIGHT (3) buttons to change the data. See figure 5.

To memorize the adjustment:

It is not required to memorize the adjustment. Data are stored automatically.

To exit the Service Mode:

Switch the TV off using the mains switch.

14.2 Service Adjustments

OSD

IF1 IF2 IF3

IF4 AGC VLIN

RGBH

VSOF VPOF HSOF HPOF HTOF

WR WG WB

OSD Horizontal Position 70 81

IF Coarse Adjust X X

IF Fine Adjust X X

IF Coarse Adjust for L-Prime X X

IF Fine Adjust for L-Prime X X

Automatic Gain Control X X

Vertical Linearity 37 10

RGB Horizontal Shift Offset CVBS – RGB Horizontal

position compensation

Vertical Size Offset for 60 Hz -30 -32

Vertical Position Offset for 60 Hz 2 1

Horizontal Size Offset for 60 Hz -22 -22

Horizontal Position Offset for 60 Hz -18 -18

Horizontal Trap Correction Offset for 60 Hz

White Point Adjust for RED 49 42

White Point Adjust for GREEN 45 41

White Point Adjust for BLUE 42 42

Bias for RED 31 31

Bias for GREEN 31 31

-19 -20

Default Values

A51EFS13X191 A51ELD032X001

8 7

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APR

BRI CON COL SHA HUE

VOL WR-R WG-R

WB-R FMP1

NIP1 SCP1 SEC1

FMP2

NIP2 SCP2 SEC2

F1H

F1L

F2H

F2L

BS1

BS2

BS3

OP1 OP2 OP3 OP4 OP5

TX1

GEOM

OP8

White Point Adjust for Red (RGB mode) 48 30

White Point Adjust for Green (RGB

White Point Adjust for Blue (RGB mode) 37 40

FM Prescaler when AVL is OFF STEREO ONLY 11 11

NICAM Prescaler when AVL is OFF STEREO ONLY 25 25

SCART Prescaler when AVL is OFF 11 11

SCART Prescaler when AVL is OFF for

FM Prescaler when AVL is ON 16 16 NICAM Prescaler when AVL is ON STEREO ONLY 37 37 SCART Prescaler when AVL is ON STEREO ONLY 17 17

SCART Prescaler when AVL is ON for

High Byte of crossover frequency for

Low Byte of crossover frequency for

High Byte of crossover frequency for

Low Byte of crossover frequency for

Teletext Option 1 (see the Option List) x x

APR Threshold 10 4

Factory Setting Brightness 31 31

Factory Setting Contrast 49 49

Factory Setting Colour 26 26

Factory Setting Sharpness 6 6

Factory Setting Hue 31 31

Factory Setting Volume 9 9

mode)

SECAM L/L’ MONO

Meaningful for only PLL

VHF1-VHF3

Meaningful for only PLL

VHF1-VHF3

Meaningful for only PLL

VHF3-UHF

Meaningful for only PLL

VHF3-UHF

Band Switch Byte for VHF1 Meaningful for only PLL

Band Switch Byte for VHF3 Meaningful for only PLL

Band Switch Byte for UHF Meaningful for only PLL

Control Byte Meaningful for only PLL

Option 1 (see the Option List) x x Option 2 (see the Option List) x x Option 3 (see the Option List) x x Option 4 (see the Option List) x x Option 5 (see the Option List) x x

Geometry Menu See Geometry Table on Page 25.

Not used x x

Tuner

Default Values

A51EFS13X191 A51ELD032X001

53 40

11 11

17 17

See “15.1 Service Registers Updating regarding the Tuner” on Page 27. See “15.1 Service Registers Updating regarding the Tuner” on Page 27. See “15.1 Service Registers Updating regarding the Tuner” on Page 27. See “15.1 Service Registers Updating regarding the Tuner” on Page 27. See “15.1 Service Registers Updating regarding the Tuner” on Page 27. See “15.1 Service Registers Updating regarding the Tuner”

on Page 27.

See “15.1 Service Registers Updating regarding the Tuner”

on Page 27.

See “15.1 Service Registers Updating regarding the Tuner” on Page 27.

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14.3 Using Coloured Buttons

By using the four coloured buttons on the remote control (24, 23, 13, 14) different features or adjust may be accessed.

Figure 6. Coloured buttons Remote Control

14.3.1 AVL

Press the RED button (23) to activate or deactivate the AVL (Automatic Volume Level, between different broadcast channels).

14.3.2 GEOMETRY MENU

Press the GREEN button (24) in order to change from the Main Service Menu to the Geometry Menu, as shows the figure 7. To return to the Main Service Menu it should be pressed the Menu button (30), see Figure 5.

Figure 7. Geometry Menu Figure 8. Remote Control

In the bottom area of this Menu, it can be seen “AUTO”. By pressing the WIDE MODE button (8) it changes to 4:3 or 16:9 format. To perform the Geometry adjustments select the most suitable option:

- AUTO, entering 4:3 or 16:9 signal and proceeding with adjustments as below.

- 4:3, entering 4:3 signal and proceeding with adjustments as below.

- 16:9, entering 16:9 signal and proceeding with adjustments as below.

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14.3.2.1 Geometry Table

Vertical Size 35 62 24 50

Vertical Position 11 16 12 16

Not used 14 14 14 14 Not used 7 7 7 7 Not used 10 9 30 11 Horizontal Position 33 33 40 39 Not used 19 15 27 15 Not used 0 0 0 0 Not used 10 10 3 10 Not used 3 2 7 2

VSIZ VPOS VSCO VCCO

HSIZ

HPOS

HPIN

HCCO

HTRP

VZSZ

14.3.2.2 Geometry Adjustments

VSIX (Vertical Size)

Default Values

A51EFS13X191 A51ELD032X001

4:3 16:9 4:3 16:9

Adjust the Vertical Size so that 8% over-scan is achieved. The effect of this adjustment is shown in figure 9.

• Use the CURSOR LEFT (32) / RIGHT (3) buttons to change the data.

See figure 5.

Figure 9

VPOS (Vertical Position)

Adjust the Vertical Position so that the picture is centred. The effect of this adjustment is shown in figure 10.

• Use the CURSOR LEFT (32) / RIGHT (3) buttons to change the data.

See figure 5. Figure 10

HPOS (Horizontal Position)

Adjust the Horizontal Position so that the picture is centred. The effect of this adjustment is shown in figure 11.

• Use the CURSOR LEFT (32) / RIGHT (3) buttons to change the data.

See figure 5.

Figure 11

14.3.3 Screen Adjustment

Press the YELLOW button (13) in order to prepare the system for screen-adjustments (Vertical Scan disable). Adjust horizontal line, via screen potentiometer, as thin as possible. To return to the Main Service Menu it should be pressed the Menu button (30).

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AK30 PLL TUNER SETTINGS

VHF1-VHF3 VHF3-UHF

Frq. (Mhz) Frq. (Mhz) F1H F1L F2H F2L BS1 BS2 BS3 CB Philips UV1316S MK3 156,25 MHz 441,25 MHz 00001100 00110010 00011110 00000010 00000001 00000010 00000100 10001110 Thomson CTT5020 114,25 MHz 401,25 MHz 00001001 10010010 00011011 10000010 00000011 00000110 10000101 10001110 Samsung TECC2949PG28B 170,25 MHz 465,25 MHz 00001101 00010010 00011111 10000010 00000001 00000010 00000100 10001110 Samsung TECC2949PG35B 170,25 MHz 449,25 MHz 00001101 00010010 00011110 10000010 00000001 00000010 00001000 10001110 Alps TEDE9X226A 142,25 MHz 425,25 MHz 00001011 01010010 00011101 00000010 00000001 00000010 00001000 10001110 Alps TEDE9-004A 149,25 MHz 424,25 MHz 00001011 11000010 00011100 11110010 00000001 00000010 00001000 10001110

AK44 SERVICE MENU ITEMS

CHASSIS

14.3.4 IF Adjustment

Select IF1, IF2, IF3 or IF4. When the blue button (14) is pressed the before selected IF register is automatically adjusted.

14.4 Auto Programming System Set Up

1. Description

In case the TV set should be serviced, there is the possibility of returning the set with the A.P.S. (Auto Programming System) activated in order to make easy the first start up to the customer. See the below figure. If this Feature is activated the Picture and Sound Menus will be automatically memorized to the default values.

2. Before start

It is necessary let the TV set in the program number that will appear for the first time, because the A.P.S does not preset this selection.

3. Procedure

3.1 Enter the Service Mode. See Page 23.

3.2 Access to TXT1 Register by CURSOR UP / DOWN.

3.3 Press 7 button on the remote control in order to activate the Auto Programming System.

3.4 Exit the Service Mode by the Menu button (30).

3.5 Switch the TV off using the mains switch.

15. OPTION LIST

15.1 Service Registers Updating regarding the Tuner

Explanations

F1H High byte of VHF1-VHF3 cross-over frequency F1L Low byte of VHF1-VHF3 cross-over frequency F2H High byte of VHF3-UHF cross-over frequency F2L Low byte of VHF3-UHF cross-over frequency BS1 Band switching byte for VHF1 BS2 Band switching byte for VHF3 BS3 Band switching byte for UHF

CB Control byte

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15.2 Registers Details

OP1 – Peripheral Options

7 NOT USED 6 1, Display “AV-3” as “F-AV”

0, Display “AV-3” as “B-AV”

5 1, Turn back TV mode after the last AV (with AV key)

0, Turn back first AV mode after the last AV

4 1, SVHS is available in AV key stream

0, SVHS is NOT available in AV key stream

3 1, RGB is available in AV key stream

0, RGB is NOT available in AV key stream

2 1, AV-3 is available in AV key stream

0, AV-3 is NOT available in AV key stream

1 1, AV-2 is available in AV key stream

0, AV-2 is NOT available in AV key stream

0 0 1, AV-1 is available in AV key stream

0, AV-1 is NOT available in AV key stream

OP2 – Reception Standard Options

7 1, 3-button keyboard (V-, P+, V+)

0, 4/5 button keyboard (V-, V+, P-, P+, Menu)

6 1, L/L’ is available

0, L/L’ is not available

5 1, I is available

0, I is not available

4 1, DK is available

0, DK is not available

3 1, BG is available

0, BG is not available

2 1 0 RESERVED (Keep as 000)

OP3 – Video Options

7 6 Xtal Configuration

00, 1 Xtal PAL 4.43 01, 2 Xtal PAL/NTSC 4.43/3.58 10, 1 Xtal PAL/SEC/NTSC 4.43 11, 2 Xtal PAL/SEC/NTSC 4.43/3.58

5 1, Enable Blue back when no signal in AV modes

0, No blue back in AV modes

4 1, White Insertion is ON

0, White Insertion is OFF

3 1, Blue Background when no signal

0, Disable Blue Background

2 1, Semi-transparent background for menu

0, Solid Menu background for menu

1 1, Black Stretch is ON

0, Black Stretch is OFF

0 1, APR is ON

0, APR is OFF

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OP4 – TV Features

7 1, Headphone is available (for STEREO models)

0, Headphone is not available

5 1, Hebrew is Available in Menu Languages (for A, D, E, F, and later)

4 1, Hotel Mode can be activated

3 1, No Signal Timer is enabled

2 For PLL Tuner

1 1, 3-band tuning (VHF1, VHF3, UHF)

0 0 1, Extra 200 msec blanking for VST

1, Arabic/Persian is Available in Menu Languages (for A, D, E, F, and later)

0, Arabic/Persian is NOT Available in Menu Languages

0, Hebrew is NOT Available in Menu Languages

0, Hotel Mode can not be activated

0, No Signal Timer is disabled

1, Frequency based search 0, Channel table based search (No meaning for VST Tuner)

0, 1-band tuning (only UHF)

0, no-extra blanking

OP5 – Channel Tables

6 1, “Programme” item in AUTOSTORE menu is visible

5 NOT USED 4 1, French OS Channel Table is available

3 1, French Channel Table is available

2 1, England Channel Table is available

1 1, East Europe Channel Table is available

0 1, West Europe Channel Table is available

1, Extra 150 msec blanking more for VST (if OP4.b0 = 1, to SECAM color problem)

0, no-extra blanking

0, “Programme” item in AUTOSTORE menu is invisible

0, French OS Channel Table is not available

0, French Channel Table is not available

0, England Channel Table is not available

0, East Europe Channel Table is not available

0, West Europe Channel Table is not available

TX1 – Teletext Options

7 0, Auto Programming System off

1, Auto Programming System on 6 RESERVED (must be 0) 5 4 3 NOT USED 2 1 0 Device type selection

000, EPROM M6 A

001, ROM H5 P

010, ROMLESS H5 P

011, EPROM M6 R

100, ROM M6 R

101, OSDEPROM M6 R

110, ROM M6 P

111, Read Auto Gain Table for the device from EEPROM

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CHASSIS

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CHASSIS

16. LANGUAGES

GROUP 1 GROUP 2

German English

Spanish Russian

Portuguese Bulgarian

Swedish Czech

Norwegian Rumanian

Finnish Croatian

Dannish

English

Turkish

Italian Polish Dutch Slovak

French Hungarian

Greek

17. HOTEL MODE FUNCTIONS

The following procedure details how to set up the Hotel Mode Functions.

1. Description

The Hotel Mode deactivates Install and Program Features from the Main Features Menu. By other hand it can be reduced the Maximum Volume Level.

2. Before Start

It is necessary to program the channel setting (tuning and sorting) because after that this features will be deactivated.

3. Procedure

3.1 Enter the Service Mode. See Page 23.

3.2 Access to OP4 Register by CURSOR UP / DOWN.

3.3 Press 4 button on the remote control in order to activate the Hotel Mode.

3.4 Exit the Service Mode by the Menu button (30).

3.5 Enter again the Service Mode but with a new sequence of numbers: 1, 3, 2 and 5 consecutively. The following On Screen Display appears (figure on the left):

3.6 Activate the Hotel Mode as the above righ figure.

3.7 Proceed with the required Volume Limit.

3.8 Exit the Service Mode.

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18. CIRCUIT DIAGRAMS

18.1 Schematic Diagram of µ-Controller & IF Circuits

4 567

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18.2 Schematic Diagram of Video Circuit

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18.2 Schematic Diagram of Video Circuit

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CHASSIS

Page 32

8 9

11 12 13 14

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CHASSIS

18.3 Schematic Diagram of SMPS Circuit

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18.3 Schematic Diagram of SMPS Circuit

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CHASSIS

Page 34

8 9

11 12 13 14

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CHASSIS

18.4 Schematic Diagram of Audio Circuit

4 567

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18.5 Schematic Diagram of Deflection Circuit

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8 9

11 12 13 14

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CHASSIS

18.6 Schematic Diagram of Scart & AV Front Circuits

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18.6 Schematic Diagram of Scart & AV Front Circuits

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CHASSIS

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8 9

11 12 13 14

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CHASSIS

18.7 Schematic Diagram of CRT Socket Circuit

4 567

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19. HOW TO UPDATE THE TECHNICAL INFORMATION

19.1 How to update the Technical Information appeared on this Service Manual (and relatives)

19.1.1. Web site: https://www.vestelservice.com

19.1.2. Select: Technical Support

19.1.3. Login: 101278

19.1.4. Password: SHPII278

By this access you can consult the latest schematic diagram or request the Parts Listing of a concrete Production Date / Serial Number.

By this way it can be also consulted the issued Technical Reports (Service Bulletins).

It can be found a Label in every chassis with additional information, i.e. the used EEPROM. See below. On the next page are given details about the Code Bar Label.

19.2 NVM / EEPROM recorder

There is available the NVM / EEPROM recorder as spare part:

Part Reference: V20096887

Description: MD.ASY.PONYPROG

Dom. Price Code: AT

Exp. Price Code: BE

This EEPROM recorder uses the free software “Pony” available at http://www.lancos.com/ppwin95.html Note: In case of Windows platform it is recommended the PonyProg v1.17h version.

19.3 Chassis Label Information

B+ Voltage

Batch number

Chassis code number

EEPROM number

25423426 - 150V 200101577 PAL /BG

Y237 - 1902 - 277

Production line number

Consecutive serial number of the related batch

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CHASSIS

19.4 Code Bar Label Information

Product Code

From the beginning of September.2002, the production month and year will be indicated inside the box as shown.

Year

Month

Year

Consecutive number

Batch number

Product code:

Year :

Month :

Batch number :

Consecutive Number:

Consecutive number

Year

It is the code that indicates Vestel internal identification number of the complete TV set.

Production year in two digits, e.g.: 02 for 2002

Production month in two digits; e.g.: 04 for April.

It is a Vestel number that is assigned by the Planning Dept. according to the customer orders. (For internal use by Vestel)

The number that indicates the sequence of the product related to the same batch number.

Page 55

Notes:

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CHASSIS

Page 56

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CHASSIS

Technical information and Production:

Vestel Electronik AS

PRINTED BY: ON:

Technical information re-issued:

SHARP ELECTRONICA ESPAÑA S.A. Service Manual Group Engineering Dept. Polígono Industrial Can Sant Joan 08190 Sant Cugat del Vallès Barcelona Spain

Think Ecology, please use

RECYCLED PAPER

Sharp 21FL-90N Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual