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 |
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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
1
This document has been published to be used for after sales service only.
21LF-90N
SERVICE MANUAL UPDATE LOG SHEET
Technical Report No. |
Cause / Solution |
Part No. |
Page No. |
Application |
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Technical Bulletin No. |
Data /Serial No. |
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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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21LF-90N |
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ELECTRICAL SPECIFICATIONS |
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•Power Input .................... |
220V-240 Volts AC 50 Hz |
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•Picture Intermediate frequency |
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L’ ................................................ |
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33.9MHz |
•Power Consumption |
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L, B/G, D/K .............................. |
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38.9MHz |
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•Sound Carrier Trap |
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Normal Operation (Method IEC60107) .............. |
62 W |
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Stand-by Operation .......................................... |
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< 3 W |
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L’ ................................................ |
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40.4MHz |
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L, D/K ......................................... |
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32.4MHz |
•Audio Power Output Rating (MPO) / Impedance |
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B/G ............................................ |
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33.4MHz |
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Internal Left Speaker ................................. |
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4 W, 16 Ω |
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•Adjacent Sound Carrier Trap |
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Internal Right Speaker |
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4 W, 16 Ω |
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L’ |
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32.4MHz |
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•Speakers |
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L, D/K, B/G ................................ |
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40.4MHz |
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Speaker elliptic (2 pcs) .......................... |
50 x 120 mm |
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•Adjacent Picture Carrier Trap |
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L’ ................................................ |
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41.9MHz |
•Convergence (Maximum Misconvergence) |
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L, D/K ...................................... |
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30.9MHz |
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B/G |
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31.9MHz |
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•Aerial Input Impedance |
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AREA |
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mm |
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21” |
VHF/UHF |
75 ohm Unbalanced |
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A |
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0.3 |
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BC |
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1.0 |
•Tuning Ranges |
48.25MHz thru 855.25 MHz |
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DE |
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1.0 |
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FGHJ |
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1.3 |
VHF: S1 - S41 CH (Hiperband) |
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KLMN |
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1.2 |
E2 - E12 / F2 - F10 |
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F’G’H’J’ |
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1.2 |
UHF: E21 - E69 |
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STUV |
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1.1 |
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•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.
3
21LF-90N
IMPORTANT SERVICING NOTES
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:
• The CRT in this receiver employs Integral Implosion Protection.
• 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.
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.
4
21LF-90N
CONTROLS & TERMINALS
MENU |
CH |
Speakers (left + right) |
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= Power On / Off |
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= Volume -/+ |
CH |
= Program -/+ |
MENU = Menu |
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VIDEO = VCR |
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AUDIO L = Audio left |
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AUDIO R = Audio right |
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= Headphone 3,6 mm Ø |
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REMOTE CONTROL
1 |
= Stand By |
2 |
= Cursor Up |
3 |
= Cursor Right |
4 |
OK = OK |
5 |
= Info (Program Menu) |
6 |
0 - 9 = Direct Program |
7 |
-/-- = Double Digit |
8 |
= Wide mode button |
9 |
P/CH+ = Program + |
10 |
+ = Volume + |
11 |
= TV / Quit Menu |
12 |
EXT = EXT button |
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(SCART, F- AV, RGB) |
13 |
Yellow = Feature Menu |
14 |
Blue = Installation Menu |
15 |
= Hold |
16 |
= Update |
17 |
= Index Page |
18 |
= Reveal |
19 |
= Expand |
20 |
= Mix |
21 |
= Teletext |
22 |
= Time |
23 |
Red = Sound Menu |
24 |
Green = Picture Menu |
25 |
= Mute |
26 |
I-II = Mono/Stereo - Dual I-II |
27-
= - Volume
28- P/CH = -Program
29= Flash back button
30 M = Menu
31 
= Cursor Down
32 
= Cursor Left
5
21LF-90N
CHASSIS LAYOUT
Mother Unit
CRT Unit |
Headphone Unit |
6
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 follow-
ing information. |
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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.
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(*) |
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REFNo. |
PARTS |
DESCRIPTION |
SNCODE |
EXCODE |
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PICTURETUBE |
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! |
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30017634 |
21"CPTTUBESAFEEWFREEREALFLAT |
BW |
CQ |
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! |
. |
30028644 |
21DEGCOIL&EARTHCB. WO/ULFLATSHARP |
AG |
AR |
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TUNER |
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TU201 |
30009637 |
TUNERWSP(PLL)38.9MK2-BATCH |
AR |
BC |
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INTEGRATEDCIRCUITS |
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IC101 |
30018063 |
ICHT48RA0AOTP |
AF |
AR |
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IC118 |
30001506 |
ICTL431 |
AC |
AH |
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IC301 |
30011824 |
ICTDA7266 |
AF |
AR |
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IC403 |
30026922 |
ICSTV2248H(SHRINK56) |
AR |
BC |
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IC502 |
30001669 |
PREAMPLIFIERTFMS1380 |
AD |
AM |
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IC700 |
30013658 |
ICMSP3410GSDIP64 |
AS |
BD |
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IC800 |
30011968 |
ICSMPSMC44608DIP8 |
AF |
AQ |
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! |
IC801 |
30015087 |
ICSAFEOPTOCOUPLERTCET1102G |
AA |
AE |
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IC803 |
30001500 |
ICLM7808 |
AC |
AH |
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IC804 |
30001622 |
IC7805(1A) |
AB |
AF |
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IC806 |
30014346 |
IC78L05TO-92(100mA) |
AA |
AE |
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TRANSISTORS |
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Q100 |
30001453 |
TRBC337 |
AA |
AC |
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Q601 |
30013656 |
TRPOWERSTX112-AP |
AA |
AE |
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Q804 |
30001454 |
TRBC548B |
AA |
AC |
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DIODES |
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D100 |
30002733 |
LEDINFRAREDIR333 |
AA |
AC |
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D1001 |
30003722 |
DIODEZENERZPD15V |
AA |
AA |
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D1003 |
30003722 |
DIODEZENERZPD15V |
AA |
AA |
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D106 |
30001377 |
DIODEZENER33VUZT33B |
AB |
AF |
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D407 |
30001284 |
DIODE1N41480.15A/100V0.5A |
AA |
AB |
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D505 |
30001284 |
DIODE1N41480.15A/100V0.5A |
AA |
AB |
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D506 |
30001284 |
DIODE1N41480.15A/100V0.5A |
AA |
AB |
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D509 |
30001279 |
LEDRED/GREENLTL293SJ |
AC |
AH |
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D602 |
30001329 |
DIODE1N40071A/1000V30A |
AA |
AB |
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D608 |
30001318 |
DIODEBA1591A/800V20A |
AA |
AB |
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D609 |
30001318 |
DIODEBA1591A/800V20A |
AA |
AB |
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D610 |
30001318 |
DIODEBA1591A/800V20A |
AA |
AB |
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D614 |
30001318 |
DIODEBA1591A/800V20A |
AA |
AB |
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D620 |
30001349 |
DIODEZENER11V |
AA |
AB |
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D701 |
30001369 |
DIODEZENER3.6VZPD |
AA |
AB |
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D800 |
30001318 |
DIODEBA1591A/800V20A |
AA |
AB |
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D801 |
30001347 |
DIODEZENER8.2V |
AA |
AB |
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D802 |
30001318 |
DIODEBA1591A/800V20A |
AA |
AB |
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D803 |
30001315 |
DIODEBYD33D1A/200V20A |
AA |
AE |
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D804 |
30001318 |
DIODEBA1591A/800V20A |
AA |
AB |
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D805 |
30009366 |
DIODEUF54023A/200V150A |
AB |
AF |
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D806 |
30001315 |
DIODEBYD33D1A/200V20A |
AA |
AE |
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D808 |
30007681 |
DIODEUF54073A/800V150A |
AB |
AF |
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21LF-90N
REFNo. |
PARTS |
DESCRIPTION |
SNCODE |
EXCODE |
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D809 |
30001329 |
DIODE1N40071A/1000V30A |
AA |
AB |
D811 |
30001329 |
DIODE1N40071A/1000V30A |
AA |
AB |
D813 |
30001329 |
DIODE1N40071A/1000V30A |
AA |
AB |
D837 |
30001329 |
DIODE1N40071A/1000V30A |
AA |
AB |
D838 |
30001329 |
DIODE1N40071A/1000V30A |
AA |
AB |
D889 |
30001384 |
TRMCR22-6 |
AB |
AG |
D890 |
30001329 |
DIODE1N40071A/1000V30A |
AA |
AB |
D893 |
30001318 |
DIODEBA1591A/800V20A |
AA |
AB |
D894 |
30001318 |
DIODEBA1591A/800V20A |
AA |
AB |
D900 |
30001318 |
DIODEBA1591A/800V20A |
AA |
AB |
D901 |
30001318 |
DIODEBA1591A/800V20A |
AA |
AB |
D902 |
30001318 |
DIODEBA1591A/800V20A |
AA |
AB |
D903 |
30001344 |
DIODEZENER6.2V1/2W |
AA |
AB |
D904 |
30001349 |
DIODEZENER11V |
AA |
AB |
D905 |
30001349 |
DIODEZENER11V |
AA |
AB |
D906 |
30001349 |
DIODEZENER11V |
AA |
AB |
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PACKAGEDCIRCUITS |
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X100 |
30002852 |
XTALREZ455KHZ |
AA |
AD |
X401 |
30001749 |
XTAL4.433619MHZ(AK15) |
AC |
AK |
X402 |
30015592 |
XTAL3.579545(WO/LOADCAP) |
AB |
AG |
X403 |
30000074 |
CAPMKT100NF63VJ |
AA |
AC |
X501 |
30002851 |
XTAL4MHZL.C=30PF |
AC |
AH |
X700 |
30001756 |
XTAL18.432MHZ |
AE |
AP |
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COILS |
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L1001 |
30001996 |
FIXEDCOIL22UHQ40K |
AA |
AB |
L1002 |
30001996 |
FIXEDCOIL22UHQ40K |
AA |
AB |
L101 |
30013412 |
FERRITEBEAD(0805)MMZ2012Y152B |
AA |
AA |
L110 |
30013412 |
FERRITEBEAD(0805)MMZ2012Y152B |
AA |
AA |
L111 |
30013412 |
FERRITEBEAD(0805)MMZ2012Y152B |
AA |
AA |
L112 |
30013412 |
FERRITEBEAD(0805)MMZ2012Y152B |
AA |
AA |
L113 |
30013412 |
FERRITEBEAD(0805)MMZ2012Y152B |
AA |
AA |
L114 |
30013412 |
FERRITEBEAD(0805)MMZ2012Y152B |
AA |
AA |
L201 |
30001979 |
FIXEDCOIL1UHQ45M-A |
AA |
AB |
L210 |
30001971 |
FERRITEBEAT(805)BLM21A601S |
AA |
AD |
L211 |
30001971 |
FERRITEBEAT(805)BLM21A601S |
AA |
AD |
L401 |
30001971 |
FERRITEBEAT(805)BLM21A601S |
AA |
AD |
L402 |
30001992 |
FIXEDCOIL10UHQ65K-A |
AA |
AB |
L403 |
30001971 |
FERRITEBEAT(805)BLM21A601S |
AA |
AD |
L404 |
30001990 |
FIXEDCOIL6.8UHQ75K |
AA |
AB |
L405 |
30014048 |
ADJ.COILVIF44MHZQ=64C=39pF |
AA |
AE |
L406 |
30001971 |
FERRITEBEAT(805)BLM21A601S |
AA |
AD |
L407 |
30002002 |
FIXEDCOIL47UHQ60K |
AA |
AB |
L603 |
30018501 |
LINEARITYCOIL100UH |
AB |
AG |
L700 |
30001971 |
FERRITEBEAT(805)BLM21A601S |
AA |
AD |
L701 |
30001971 |
FERRITEBEAT(805)BLM21A601S |
AA |
AD |
L702 |
30001996 |
FIXEDCOIL22UHQ40K |
AA |
AB |
L703 |
30001979 |
FIXEDCOIL1UHQ45M-A |
AA |
AB |
L704 |
30001979 |
FIXEDCOIL1UHQ45M-A |
AA |
AB |
L802 |
30001971 |
FERRITEBEAT(805)BLM21A601S |
AA |
AD |
L803 |
30000580 |
RESCF1/4W22RJ |
AA |
AB |
L805 |
30001971 |
FERRITEBEAT(805)BLM21A601S |
AA |
AD |
L806 |
30001971 |
FERRITEBEAT(805)BLM21A601S |
AA |
AD |
L807 |
30001992 |
FIXEDCOIL10UHQ65K-A |
AA |
AB |
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CERAMICFILTERS |
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Z401 |
30012545 |
FILTERSAWK9656M |
AG |
AR |
Z402 |
30014261 |
FILTERSAWK3958M |
AF |
AR |
Z404 |
30001724 |
FILTERSERTRAPTPS5.5MHZ |
AB |
AF |
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TRANSFORMERS |
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! |
TR601 |
30017788 |
TRFFBTSAFE90ø(AK30,AK36LAYERTYPE) |
AT |
BE |
! |
TR801 |
30002100 |
LINEFILTERSAFE2*27MH |
AC |
AH |
! |
TR802 |
30027707 |
TRFSMPSAK44RF(170-270V) Audio=14V |
AF |
AQ |
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CAPACITORS |
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7
21LF-90N
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REFNo. |
PARTS |
DESCRIPTION |
SNCODE |
EXCODE |
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C100 |
30000352 |
CAPEL100UF16VM |
AA |
AB |
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C201 |
30000400 |
CAPEL47UF50VM |
AA |
AB |
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C205 |
30000371 |
CAPEL22UF50VM |
AA |
AB |
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C300 |
30000400 |
CAPEL47UF50VM |
AA |
AB |
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C302 |
30000092 |
CAPMKT220NF63VJ |
AA |
AD |
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C305 |
30000092 |
CAPMKT220NF63VJ |
AA |
AD |
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C404 |
30000225 |
CAPCER220PF50VJSL |
AA |
AB |
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C409 |
30000345 |
CAPEL10UF50VM |
AA |
AB |
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C410 |
30000384 |
CAPEL2.2UF50VM |
AA |
AB |
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C411 |
30000345 |
CAPEL10UF50VM |
AA |
AB |
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C413 |
30000362 |
CAPEL1UF50VM |
AA |
AB |
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C416 |
30000362 |
CAPEL1UF50VM |
AA |
AB |
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C417 |
30000362 |
CAPEL1UF50VM |
AA |
AB |
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C419 |
30000413 |
CAPEL4.7UF50VM |
AA |
AB |
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C420 |
30000100 |
CAPMKT330NF63VJ |
AA |
AD |
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C422 |
30000400 |
CAPEL47UF50VM |
AA |
AB |
|
C423 |
30000400 |
CAPEL47UF50VM |
AA |
AB |
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C424 |
30000345 |
CAPEL10UF50VM |
AA |
AB |
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C431 |
30000362 |
CAPEL1UF50VM |
AA |
AB |
|
C433 |
30000345 |
CAPEL10UF50VM |
AA |
AB |
|
C436 |
30000109 |
CAPMKT470NF63VJ |
AA |
AD |
|
C440 |
30000074 |
CAPMKT100NF63VJ |
AA |
AC |
|
C442 |
30000362 |
CAPEL1UF50VM |
AA |
AB |
|
C443 |
30000362 |
CAPEL1UF50VM |
AA |
AB |
|
C444 |
30000384 |
CAPEL2.2UF50VM |
AA |
AB |
|
C446 |
30000345 |
CAPEL10UF50VM |
AA |
AB |
|
C460 |
30000345 |
CAPEL10UF50VM |
AA |
AB |
|
C502 |
30000396 |
CAPEL47UF16VM |
AA |
AB |
|
C513 |
30000371 |
CAPEL22UF50VM |
AA |
AB |
|
C519 |
30000352 |
CAPEL100UF16VM |
AA |
AB |
|
C531 |
30000384 |
CAPEL2.2UF50VM |
AA |
AB |
|
C536 |
30000074 |
CAPMKT100NF63VJ |
AA |
AC |
|
C541 |
30000109 |
CAPMKT470NF63VJ |
AA |
AD |
|
C542 |
30000205 |
CAPCER150PF50VJSL |
AA |
AB |
|
C543 |
30000205 |
CAPCER150PF50VJSL |
AA |
AB |
|
C603 |
30000384 |
CAPEL2.2UF50VM |
AA |
AB |
|
C604 |
30000400 |
CAPEL47UF50VM |
AA |
AB |
|
C608 |
30000107 |
CAPMKT47NF250VJ |
AA |
AD |
|
C610 |
30018901 |
CAPEL100UF50VM105° |
AA |
AB |
|
C611 |
30000092 |
CAPMKT220NF63VJ |
AA |
AD |
|
C613 |
30000078 |
CAPMKT1UF100VM |
AB |
AF |
|
C615 |
30000359 |
CAPEL1000UF16VM |
AA |
AC |
|
C616 |
30000400 |
CAPEL47UF50VM |
AA |
AB |
! |
C618 |
30000134 |
CAPMKPSAFE11NF2000V%3.5 |
AC |
AH |
|
C619 |
30000131 |
CAPMKPSAFE100NF250VJ |
AA |
AB |
|
C624 |
30000350 |
CAPEL10UF250VM |
AA |
AD |
! |
C627 |
30006750 |
CAPMKP220NF400VJ |
AA |
AD |
|
C628 |
30018380 |
CAPEL3.3UF160VM105° |
AA |
AB |
|
C631 |
30000410 |
CAPEL470UF50VM |
AB |
AF |
|
C632 |
30000100 |
CAPMKT330NF63VJ |
AA |
AD |
|
C634 |
30000409 |
CAPEL470UF25VM |
AA |
AD |
|
C635 |
30000100 |
CAPMKT330NF63VJ |
AA |
AD |
|
C636 |
30000400 |
CAPEL47UF50VM |
AA |
AB |
|
C641 |
30000345 |
CAPEL10UF50VM |
AA |
AB |
|
C643 |
30000116 |
CAPMKT68NF63VJ |
AA |
AC |
|
C644 |
30000362 |
CAPEL1UF50VM |
AA |
AB |
|
C705 |
30000345 |
CAPEL10UF50VM |
AA |
AB |
|
C706 |
30000345 |
CAPEL10UF50VM |
AA |
AB |
|
C712 |
30000345 |
CAPEL10UF50VM |
AA |
AB |
|
C720 |
30000345 |
CAPEL10UF50VM |
AA |
AB |
|
C724 |
30000345 |
CAPEL10UF50VM |
AA |
AB |
|
C730 |
30000393 |
CAPEL3.3UF50VM |
AA |
AB |
|
C733 |
30000345 |
CAPEL10UF50VM |
AA |
AB |
|
C734 |
30000345 |
CAPEL10UF50VM |
AA |
AB |
|
C736 |
30000345 |
CAPEL10UF50VM |
AA |
AB |
|
C737 |
30000371 |
CAPEL22UF50VM |
AA |
AB |
|
REFNo. |
PARTS |
DESCRIPTION |
SNCODE |
EXCODE |
|
|
|
|
|
|
|
C738 |
30000371 |
CAPEL22UF50VM |
AA |
AB |
! |
C801 |
30000094 |
CAPMKTSAFE220NF275VMAC |
AA |
AB |
! |
C802 |
30000094 |
CAPMKTSAFE220NF275VMAC |
AA |
AB |
|
C803 |
30000433 |
CAPCER1NF1KVMB |
AA |
AB |
|
C805 |
30018085 |
CAPVARSAFE510VKMFCN14D511 |
AA |
AD |
|
C806 |
30000433 |
CAPCER1NF1KVMB |
AA |
AB |
|
C808 |
30000295 |
CAPCER100NF50VZF |
AA |
AB |
|
C809 |
30000420 |
CAPEL150UF400VM |
AF |
AQ |
|
C810 |
30000400 |
CAPEL47UF50VM |
AA |
AB |
! |
C811 |
30000161 |
CAPMKPSAFE47NF630VJ |
AB |
AE |
|
C813 |
30000295 |
CAPCER100NF50VZF |
AA |
AB |
! |
C816 |
30000440 |
CAPCERSAFE2.2NF4KVM |
AA |
AC |
|
C817 |
30000198 |
CAPCER120PF500VJSL |
AA |
AB |
|
C822 |
30007308 |
CAPCER220PF1KVK(PULSE) |
AA |
AD |
|
C824 |
30009208 |
CAPCER470PF1KVK(PULSE) |
AA |
AC |
|
C827 |
30000411 |
CAPEL4700UF16VM |
AC |
AH |
|
C828 |
30000295 |
CAPCER100NF50VZF |
AA |
AB |
|
C829 |
30000359 |
CAPEL1000UF16VM |
AA |
AC |
|
C830 |
30000382 |
CAPEL2200UF16VM |
AB |
AF |
|
C832 |
30000295 |
CAPCER100NF50VZF |
AA |
AB |
|
C833 |
30000407 |
CAPEL470UF16VM |
AA |
AC |
|
C834 |
30000295 |
CAPCER100NF50VZF |
AA |
AB |
|
C836 |
30000431 |
CAPCER100PF1KVM |
AA |
AC |
|
C838 |
30000352 |
CAPEL100UF16VM |
AA |
AB |
|
C839 |
30000352 |
CAPEL100UF16VM |
AA |
AB |
|
C840 |
30000352 |
CAPEL100UF16VM |
AA |
AB |
|
C843 |
30000431 |
CAPCER100PF1KVM |
AA |
AC |
|
C848 |
30000352 |
CAPEL100UF16VM |
AA |
AB |
|
C849 |
30000352 |
CAPEL100UF16VM |
AA |
AB |
|
C850 |
30000352 |
CAPEL100UF16VM |
AA |
AB |
|
C855 |
30000407 |
CAPEL470UF16VM |
AA |
AC |
|
C859 |
30013533 |
CAPCER100PF1KVK(PULSE) |
AA |
AC |
|
C862 |
30000367 |
CAPEL1UF250VM |
AA |
AB |
! |
C864 |
30000440 |
CAPCERSAFE2.2NF4KVM |
AA |
AC |
|
C907 |
30000434 |
CAPCER1NF2KVKB |
AA |
AB |
|
C908 |
30000415 |
CAPEL4.7UF250VM |
AA |
AC |
|
C912 |
30000075 |
CAPMKT100NF250VK(DC) |
AA |
AD |
|
|
RESISTORS |
|
|
|
|
|
|
|
R1001 |
30000492 |
RESCF1/4W120RJ |
AA |
AA |
R1002 |
30000492 |
RESCF1/4W120RJ |
AA |
AA |
R105 |
30000792 |
RESCF1/4W75RJ |
AA |
AB |
R127 |
30000459 |
RESCF1/4W100RJ |
AA |
AB |
R204 |
30000459 |
RESCF1/4W100RJ |
AA |
AB |
R206 |
30000459 |
RESCF1/4W100RJ |
AA |
AB |
R301 |
30000471 |
RESCF1/4W10KJ |
AA |
AB |
R302 |
30000471 |
RESCF1/4W10KJ |
AA |
AB |
R407 |
30000590 |
RESCF1/4W2.2KJ |
AA |
AB |
R410 |
30000590 |
RESCF1/4W2.2KJ |
AA |
AB |
R420 |
30000466 |
RESCF1/4W1KJ |
AA |
AB |
R424 |
30000712 |
RESCF1/4W470RJ |
AA |
AB |
R428 |
30000792 |
RESCF1/4W75RJ |
AA |
AB |
R437 |
30000466 |
RESCF1/4W1KJ |
AA |
AB |
R438 |
30000466 |
RESCF1/4W1KJ |
AA |
AB |
R442 |
30000466 |
RESCF1/4W1KJ |
AA |
AB |
R450 |
30000712 |
RESCF1/4W470RJ |
AA |
AB |
R469 |
30000670 |
RESCF1/4W330KJ |
AA |
AB |
R507 |
30000466 |
RESCF1/4W1KJ |
AA |
AB |
R508 |
30000622 |
RESCF1/4W270RJ |
AA |
AB |
R510 |
30000737 |
RESCF1/4W5.1KJ |
AA |
AB |
R513 |
30000459 |
RESCF1/4W100RJ |
AA |
AB |
R514 |
30000459 |
RESCF1/4W100RJ |
AA |
AB |
R518 |
30000471 |
RESCF1/4W10KJ |
AA |
AB |
R525 |
30000583 |
RESCF1/4W220RJ |
AA |
AB |
R527 |
30000718 |
RESCF1/4W4.7KJ |
AA |
AB |
R534 |
30000526 |
RESCF1/4W1.5KJ |
AA |
AB |
8
21LF-90N
|
REFNo. |
PARTS |
DESCRIPTION |
SNCODE |
EXCODE |
|
|
|
|
|
|
|
R535 |
30000718 |
RESCF1/4W4.7KJ |
AA |
AB |
|
R536 |
30000471 |
RESCF1/4W10KJ |
AA |
AB |
|
R546 |
30000560 |
RESCF1/4W1.8KJ |
AA |
AB |
|
R559 |
30000470 |
RESCF1/2W10KJ |
AA |
AA |
|
R562 |
30000471 |
RESCF1/4W10KJ |
AA |
AB |
|
R601 |
30000752 |
RESCF1/4W56KJ |
AA |
AB |
|
R602 |
30000820 |
RESCF1/4W82KJ |
AA |
AB |
|
R605 |
30000513 |
RESCF1/4W130KJ |
AA |
AB |
|
R623 |
30000607 |
RESCF1/4W2.2RJ |
AA |
AB |
|
R624 |
30001120 |
RESMO2W22RJ |
AA |
AB |
|
R625 |
30000900 |
RESMF1/4W1.8KJ |
AA |
AB |
|
R627 |
30000910 |
RESMF1/2W1.8RG |
AA |
AB |
|
R630 |
30000828 |
RESCF1/4W8.2MJ |
AA |
AB |
|
R631 |
30000885 |
RESMF1/4W1.5KJ |
AA |
AB |
|
R633 |
30000650 |
RESCF1/4W33RJ |
AA |
AB |
|
R637 |
30000621 |
RESCF1/2W270RJ |
AA |
AB |
|
R638 |
30000589 |
RESCF1/2W2.2KJ |
AA |
AA |
|
R639 |
30000718 |
RESCF1/4W4.7KJ |
AA |
AB |
|
R645 |
30018904 |
RESMO5W4.7kJ |
AA |
AD |
|
R646 |
30014941 |
RESCF1/4W16KJ |
AA |
AA |
|
R647 |
30000466 |
RESCF1/4W1KJ |
AA |
AB |
! |
R648 |
30001216 |
RESFUSE1W1.2RJ |
AA |
AA |
|
R649 |
30014941 |
RESCF1/4W16KJ |
AA |
AA |
|
R650 |
30000744 |
RESCF1/4W560RJ |
AA |
AB |
|
R654 |
30000458 |
RESCF1/2W100RJ |
AA |
AB |
|
R655 |
30000705 |
RESCF1/2W47RJ |
AA |
AB |
|
R659 |
30001151 |
RESMO3W330RJ |
AA |
AD |
|
R662 |
30000712 |
RESCF1/4W470RJ |
AA |
AB |
|
R663 |
30000459 |
RESCF1/4W100RJ |
AA |
AB |
|
R666 |
30001077 |
RESMO2W10RJ |
AA |
AC |
|
R701 |
30000459 |
RESCF1/4W100RJ |
AA |
AB |
|
R703 |
30000459 |
RESCF1/4W100RJ |
AA |
AB |
|
R705 |
30000459 |
RESCF1/4W100RJ |
AA |
AB |
|
R801 |
30000982 |
RESMF1/4W4.7KJ |
AA |
AA |
|
R804 |
30000504 |
RESCF1/4W120KJ |
AA |
AB |
|
R805 |
30000843 |
RESMF1/4W10RJ |
AA |
AB |
|
R806 |
30000982 |
RESMF1/4W4.7KJ |
AA |
AA |
|
R807 |
30001159 |
RESMO1W0.33RJ |
AA |
AB |
! |
R810 |
30001257 |
RESMGSAFE1/2W4.7MJ |
AA |
AD |
|
R811 |
30000594 |
RESCF1/4W22KJ |
AA |
AB |
|
R813 |
30000718 |
RESCF1/4W4.7KJ |
AA |
AB |
|
R815 |
30000452 |
RESCF1/4W10RJ |
AA |
AB |
|
R817 |
30001037 |
RESMF1/4W99KF |
AA |
AB |
|
R818 |
30006463 |
RESMF1/4W2KF |
AA |
AA |
|
R819 |
30000810 |
RESCF1/4W820RJ |
AA |
AB |
|
R821 |
30000470 |
RESCF1/2W10KJ |
AA |
AA |
|
R828 |
30001265 |
NTCMONITOR10R/3ASCK-103 |
AA |
AB |
|
R829 |
30000718 |
RESCF1/4W4.7KJ |
AA |
AB |
! |
R836 |
30001224 |
RESFUSESAFE1/2W0.22RJ |
AA |
AB |
|
R900 |
30006712 |
FERRITEBEAD3.5X4.7X0.8 |
AA |
AB |
|
R901 |
30006712 |
FERRITEBEAD3.5X4.7X0.9 |
AA |
AB |
|
R902 |
30006712 |
FERRITEBEAD3.5X4.7X0.10 |
AA |
AB |
|
R903 |
30000886 |
RESMF1/4W1.5KF |
AA |
AB |
|
R904 |
30000886 |
RESMF1/4W1.5KF |
AA |
AB |
|
R905 |
30000886 |
RESMF1/4W1.5KF |
AA |
AB |
|
R906 |
30000525 |
RESCF1/2W1.5KJ |
AA |
AB |
|
R919 |
30001213 |
RESFUSE1/4W1RJ |
AA |
AA |
|
|
MISCELLANEOUSPARTS |
|
|
|
|
|
|
|
! F801 |
20000848 |
FUSEASSY.TK79-A(2.5A) |
AA |
AD |
JK1 |
30027655 |
JACKRCA1PWHITESHARP(AK44) |
AA |
AC |
JK100 |
30001900 |
JACKHEADPHONEHP01/2/3/4/5/6 |
AD |
AM |
JK100 |
30027656 |
JACKRCA1PREDSHARP(AK44) |
AA |
AC |
JK2 |
30027654 |
JACKRCA1PYELLOWSHARP(AK44) |
AA |
AC |
NOT1 |
30009849 |
CABL1P/70 SIS |
AA |
AB |
PL100 |
30001829 |
CONNHEADER2P2.5MM TOPWHTSD |
AA |
AB |
|
REFNo. |
PARTS |
DESCRIPTION |
SNCODE |
EXCODE |
|
|
|
|
|
|
|
PL100 |
30017791 |
CONN.ASSY.2/25WHITESIEXT.SPK&NELTRON |
AA |
AD |
|
PL100 |
30017953 |
CONNMALE5PSIDEWHITE |
AA |
AA |
|
PL100 |
30018454 |
CONNHEADER2P2.5MMTOPBLACK |
AA |
AA |
|
PL100 |
30027658 |
CNAS2P+3P/300W/CBLK&WHTUL1007AWG24 |
AB |
AF |
|
PL101 |
30015053 |
SOCKETSCARTNEWTYPE |
AB |
AF |
|
PL105 |
30001830 |
CONNHEADER2P2.5MMTOPBLUESD |
AA |
AB |
|
PL107 |
30001835 |
CONNHEADER3P2.5MMTOPWHTSD |
AA |
AB |
|
PL109 |
30015192 |
CONNHEADER2P2.5MMTOPYELLOWSD |
AA |
AA |
|
PL110 |
30001830 |
CONNHEADER2P2.5MMTOPBLUESD |
AA |
AB |
|
PL110 |
30027659 |
CNAS2P/150W/DC SHLBLUE |
AC |
AH |
|
PL115 |
30001835 |
CONNHEADER3P2.5MMTOPWHTSD |
AA |
AB |
|
PL115 |
30002251 |
CNAS3P/280 SHLW/DCUL2547AWG24 |
AB |
AF |
|
PL301 |
30001829 |
CONNHEADER2P2.5MMTOPWHTSD |
AA |
AB |
|
PL302 |
30018454 |
CONNHEADER2P2.5MMTOPBLACK |
AA |
AA |
|
PL405 |
30006709 |
CONNHEADER5P2.5MMTOPWHTSD |
AA |
AB |
|
PL407 |
30001836 |
CONNHEADER3P2.5MMTOPBLACKSD |
AA |
AB |
|
PL501 |
30001783 |
CONNHEADER5P2.5MMTOPBD |
AA |
AC |
|
PL503 |
30009085 |
CABLE1PR2.635W/CLIPS |
AA |
AC |
|
PL504 |
30019101 |
CABL1P/350 DISUL1672AWG22 |
AA |
AB |
|
PL601 |
30001827 |
CONNHEADER4P5/7.5MMTOPWHT |
AA |
AD |
|
PL602 |
30006660 |
CONNHEADER4P2.5MMTOPWHTSD |
AA |
AB |
|
PL801 |
30001792 |
CONNHEADER2P7.5MMTOPWHT |
AA |
AC |
|
PL802 |
30001795 |
CONNHEADER3P5/7.5MMTOPWHT |
AA |
AC |
|
PL900 |
30016695 |
CNAS5P/450FLTW/C+CBLHUL2468AWG24 |
AB |
AE |
|
PL902 |
30016694 |
CNAS4P/450FLTW/C+CBLHUL2468AWG24 |
AA |
AE |
! |
PL903 |
30001855 |
SOCKET CRTSAFE NARROWNECK W/GND |
AD |
AM |
|
SG900 |
30000428 |
SPARKGAP300V |
AB |
AG |
|
SG901 |
30000428 |
SPARKGAP300V |
AB |
AG |
|
SG902 |
30000428 |
SPARKGAP300V |
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 |
SWITCHSAFEON/OFF4A/128AJVC |
AC |
AH |
! |
TH800 |
30001268 |
THERMISTOR3P |
AD |
AM |
|
. |
20092581 |
CABLEASSY.4/45(HRZ&VER)IMPROVEDNEW |
AB |
AF |
|
. |
20141421 |
CRTB.ASSY.TP44-RF/SF(AK44) |
AQ |
BA |
|
. |
20141673 |
CRTB.ASSY.TP44-OTORF/SF(AK44) |
AD |
AN |
|
. |
20143374 |
IC24C08U00125110210121202 |
AB |
AE |
|
. |
20145022 |
CHS.ASSY.44-512B215132231E |
BM |
CC |
|
. |
20146661 |
MD.ASY.HP44-STEREO(HP+FAV)(AK44) |
AE |
AP |
|
. |
20151167 |
SPK.AS.2163SHARPSTR(AK44) |
AR |
BC |
|
. |
20151168 |
SPK.AS.2163SHARP(R)(AK44) |
AM |
AX |
|
. |
20151169 |
SPK.AS.2163SHARP(L)(AK44) |
AM |
AX |
|
. |
20151304 |
POWERCORDASSY.(2.4MTW/FTZ)(AK44SHARP) |
AD |
AM |
|
. |
20157066 |
PR.IC.36/44-SHARP36_44_A17 |
AU |
BF |
! |
. |
20069673 |
FIREBARRIER(I)(NATURAL-V.O.)(AK30) |
AA |
AC |
|
. |
30001386 |
TRMTP6N60E(PLASTIC) |
AE |
AP |
|
. |
30001448 |
TRBU808DFI |
AF |
AQ |
|
. |
30001731 |
FUSESAFE2.5A250V5*20MM |
AA |
AC |
|
. |
30001793 |
CONNHOUSING2P7.5MMTOP |
AA |
AD |
|
. |
30006987 |
IC24C08(WP) |
AC |
AH |
|
. |
30007248 |
CONNHOUSING4P3.96MMTOPWHT |
AA |
AB |
|
. |
30009366 |
DIODEUF54023A/200V150A |
AB |
AF |
|
. |
30009783 |
SOCKETIC56P(SHRINK) |
AC |
AH |
|
. |
30009784 |
SOCKETIC8P(DIP) |
AA |
AB |
|
. |
30014568 |
TERMINALSSC2000T |
AA |
AB |
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. |
30017855 |
CONN.ASSY.4/45(HRZ&VER)IMPROVEDNEW |
AB |
AF |
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. |
30018426 |
CNAS2P/690SISW/BLKC+FERUL1007AWG24 |
AB |
AF |
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. |
30018427 |
CNAS2P/500SPKSISW/C+FERUL1007AWG24 |
AB |
AF |
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30025172 |
ICTDA6107JF/N3 |
AF |
AQ |
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. |
30026954 |
PCB11UK12 |
AB |
AF |
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. |
30027134 |
SPEAKER16R4WF/R50x120MM-21"SHARP |
AF |
AR |
! |
. |
30028208 |
POWERCORDSAFEEURO2.2MSHARPW/FILTER |
AG |
AT |
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35000136 |
FUSEHOLDERTK79-A(GRAY) |
AA |
AD |
9
21LF-90N
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REFNo. |
PARTS |
DESCRIPTION |
SNCODE |
EXCODE |
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ARTWORK |
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20141199 |
SCR.ASSY.2163HP(2SP) |
AC |
AK |
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. |
20143026 |
R/C1548SHARP(EKO2GRAY/I)(GRAY/S) |
AM |
AY |
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. |
35000158 |
NUTCZNBOTTOMM3 |
AA |
AB |
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. |
35000165 |
KNURLWASHERCZNSY3*6*04(M3) |
AA |
AB |
|
. |
35000180 |
SCREWCZNYSMBM3*6 |
AA |
AA |
|
. |
35000181 |
SCREWCZNYSMBM3*8 |
AA |
AB |
|
. |
35000182 |
SCREWCZNYSMBM3*10 |
AA |
AA |
|
. |
35000224 |
SCREWCSKZNYFMB2.9*9.5 |
AA |
AB |
|
. |
35004572 |
SCREWPCAgSYFYSB4x20 |
AA |
AB |
|
. |
35005084 |
SCREWCZNRYAKB6x30 |
AA |
AB |
|
. |
35005418 |
SCREWPCZNYSB3.5x10(KN1031T35X10) |
AA |
AA |
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. |
35008081 |
SCREWPCZNYFMB3*9.5 |
AA |
AA |
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. |
35008812 |
SCREWPCZNRYSB3x10 |
AA |
AB |
|
. |
35009300 |
SCREWPCSYFRYSB4*11 |
AA |
AB |
|
. |
40016817 |
LOGOSHARP(D.C.-SILVER)21"RF |
AC |
AH |
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. |
50043630 |
WARRANTYCARDSHARP(ESP) |
AB |
AF |
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. |
50043894 |
CONTROLSTICKERSTREO2163RFSHARP |
AD |
AN |
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. |
50048335 |
CARTONBOXSHARPSHARP(2163) |
AL |
AX |
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. |
50048448 |
I/BSHARP21LF90N(ES)P/AK44/1548/ES/POR |
AD |
AL |
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COSMETICS |
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! |
. |
20140383 |
BACKCVR.2163RFEKO2GRAY(AK44) |
AQ |
BA |
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. |
20140387 |
SNOWBOXTOP2163RFSHARP |
AA |
AA |
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. |
20140388 |
SNOWBOX BOTTOM 2163RFSHARP |
AA |
AA |
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. |
20141198 |
BUTTONASSY2163(SLV285S/P) |
AC |
AK |
|
. |
20141200 |
SNOWBOXASSY2163 |
AA |
AA |
|
. |
20146997 |
CONTROLPAN.DOOR2163RFSHARPSLV285S(P) |
AD |
AM |
|
. |
20151084 |
FRONT2163AV/3HW/H&JSLV285S(P)(PW/S)2SK |
AR |
BC |
|
. |
40012331 |
RUBBERPAD (RC1542) |
AD |
AL |
|
. |
40016859 |
RUBBER WASHER 2163RF(I)SHARP |
AA |
AB |
|
. |
40016871 |
DOORSPACER(M10) |
AA |
AA |
10
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).
11
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
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
PRINTED BY: 
ON: 
Think Ecology, please use
RECYCLED PAPER
12
AK - 44
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 |
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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
1
This document has been published to be used for after sales service only.
AK - 44
CHASSIS
SERVICE MANUAL UPDATE LOG SHEET
Technical Report No. |
Cause / Solution |
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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).
2
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AK - 44 |
|
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 |
3
AK - 44 |
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CHASSIS |
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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 |
14.3.2.1 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 |
4
AK - 44
CHASSIS
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
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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
8AV switching input 0-12 VDC / 10 K
9Ground Green
10-
11Green input 0.7 Vpp / 75 ohm
12-
13Ground Red
14Ground Blanking
15Red input 0.7 Vpp / 75 ohm
16Blanking input 0-0.4 VDC, 1-3 VDC / 75 Ohm
17Ground CVBS output
18Ground CVBS input
19CVBS output 1 Vpp / 75 ohm
20CVBS input 1 Vpp / 75 ohm
21Ground
5
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