11ak36 Tech Bulletins

ELEKTRONIK A.S.TECHNICAL CHANGE BULLETIN CHANGE NO: 112

REF NO : DATE :12.03.2002

AFFECTED MODELS: MODELS WITH 11AK36 CHASSIS

START DATE : 14.03.2002

REASONS OF CHANGE:

FOR SMPS IC POSITION IC 841 OF CHASSIS 11AK36 , IC FROM DIFFERENT SUPPLIER ARE USED .TO SET THE SAME WORKING FREQUENCY OF APPROX. 50 KHZ FOR ALL SUPPLIER’S , SOME VALUES OF SOME COMPONENTS ARE DIFFERENT .THE TABLE BELOW SHOWS ALL USED IC’S WITH PRINT OF THEM AND THE VALUE OF THE OPTIONAL COMPONENTS .

COMPANY R804 C807 PRINT ON ICVESTEL CODE

COMPONENT NAME VESTEL CODE

COMPONENT NAME

HI-SINCERITY

30000531 RES CF 1/4W 15K J 30000088 CAP MKT 2.2NF 63V J H 3842 P

ON-SEMI 30000531 RES CF 1/4W 15K J 30000088 CAP MKT 2.2NF 63V J UC 3842AN

KEC N.C. 30000096 CAP MKT 27nF 100V J KIA 3842P

ST 30000770 RES CF 1/4W 680R 30000099 CAP MKT 33nF 100V J ST UC3842A

UTC 30000770 RES CF 1/4W 680R 30000099 CAP MKT 33nF 100V J UTC UC3842A

HUA-JING 30000770 RES CF 1/4W 680R 30000099 CAP MKT 33nF 100V J YD 3842

NOPCB

CODEVESTEL CODE COMPONENT NAME POSITION NUMBER QUANTITY

123

INNO PCB

CODEVESTEL CODE COMPONENT NAME POSITION NUMBER QUANTITY

123

CUSTOMER SUPPORT

ENGINEERQUALITY

MANAGER

ELEKTRONIK A.S. TECHNICAL CHANGE BULLETIN

CHANGE NO: 120 REF NO : DATE :11.12.2001

AFFECTED MODELS: ALL MODELS 11AK36

START DATE : 11.12.2001 REASONS OF CHANGE: TO INCREASE FLUCTUATION RELIABILITY

OUT NO PCB

CODE VESTEL CODE COMPONENT NAME POSITION NUMBER QUANTITY

1 AK36 30016654 CAP SMD 100NF 16V K R (0603 C810 1

2 30000345 CAP EL 10UF 50V M C811 1

3 30000531 RES CF 1/4W 15K J R804 1

4 30001158 RES MO 1/2W 0.33R J R810 1

5 30000088 CAP MKT 2.2NF 63V J C807 1

6 30000673 RES CF 1W 330K J R807 1

IN

NO PCB CODE

VESTEL CODE COMPONENT NAME POSITION NUMBER QUANTITY

1 AK36 30016126 CAP SMD 220NF 16V K R (0603) C810 1

2 30000387 CAP EL 33 UF 50 V M C811 1

3 30000770 RES CF 1/4 W 680R J R804 1

4 30000096 CAP MKT 27NF 100V J C807 1

5 30001173 RES MO 1W 0.47R J R810 1

6 30006754 RES MO 2W 120K J R807 1

CUSTOMER SUPPORT

ENGINEER QUALITY

MANAGER

CENGIZ TARHAN

ALI TUNC CAN

Form Rev.No:00 Form No: 10.KALT.68

Katod of D703

Smd 1k (note 1 )

Diode BA159(note 2 )

Cable between Katod of BA159 and Katod of D703 ( note 3 )

Service BulletinModel:

All models with AK36 Chassis.

ServiceBulletin No: 121

Priority( )S. All products.( )A. Items in Customer / Dealer stock / Service return goods.( )B. Customer stock / Units returned for Service.( X)C. Sold items returned for Service.( )D. Only Units returned to this bulletin.( )E. Others

SUBJECT : Improvemet on Hor. Tr –SMPS IC for AK36 Chs. DATE : Aug 16, 2002

<Objective>Please modify if following symptom occurs

<Symptom>While TV is switching to st-by off, the st-by led is blinking in a short time.

<Cause>The negative peaks between the anode and cathode of the Thyristor.

<Countermeasures>

Apply that modification:

CHANGE Q601 THEN,

Replace;

R804: RES CF 1/4W 15K J è RES CF 1/4W 1K J

R805: RES CF 1/4W 1K J è RES CF 1/4W 470R J

C807: CAP MKP 2.2 NF 63V J è CAP MKP 22 NF 100V J

Connect a RES SMD 1/16W 22K J between the base and collector of q601.

<Spare Parts order>

VE- 30000466: RES CF 1/4W 1K J

VE-30000712: RES CF 1/4W 470R J

VE-30000090: CAP MKP 22 NF 100V J

VE-30012669 : RES SMD 1/16W 22K J

<Start Date of Modification on Production.>





SUBJECT : IC404 DEFECT DATE : MAY 30, 2002


<Symptom>While TV is switching to ON, there is no audio.

<Cause>The over voltage stress on the IC404.

<Countermeasures>


CHANGE IC401 THEN,

Replace;

J188: JUMBER WIRE è RES FUSE ½ W 0.33R J

<Spare Parts order>

VE- 30001235: RES FUSE ½ W 0.33R J


31.05.2002 (Related Changing Form: 929)

Service BulletinModel:AK36 and AK46 chassis with TP46I-3 CRT board


Priority( )S. All product.( )A. Items in Customer / Dealer stock / Service return goods.( )B. Customer stock / Units returned for Service.( X)C. Sold items returned for Service.( )D. Only Units returned to this bulletin.( )E. Others

SUBJECT : IC403(STV224X) defects DATE : August 27, 2002

<Objective>Please modify if following symptom occurs.

<Symptom>No picture after switching on due to the IC403 RGB outputs are defected.1.When the picture is only green due to 20. Pin of IC403 CVBS SW pin) is defected.2.When Picture is vertically shifted3.

<Cause>

Spark on CRT1.

No good grounding on Tuner2.

Base and emitter of Q603 is short circuit.3.

<Countermeasures>

After changing the defected IC403, Applied

the following modifications to repair chassis and prevent reoccurence of defects

Modifty TP46I-3 CRT board by insertion BA159 diode between 200V and RGB driver resistors as 1.

explain below.

Solder the anode of Diode BA159 (VE-30001318) to cathode of D902; solder the cathode of Diode

BA159 to Q909 collector (intersection point with R913).





Connect a Diode zener 8.2V (VE-30001347) between the Emitter of Q2 ( - point of C424) and – point 2.

of C485 in order to good grounding on Tuner as explain below.

Solder cathode of Diode Zener to the Emitter of Q2 (- point of C424), solder anode of Diode Zener to –

point of C485.

Connect a Diode zener 8.2V (VE-30001347) between the Collector of Q603 and ground for Vertical 3.

shift problem

Solder cathode of Diode Zener to the Collectorr of Q603, solder anode of Diode Zener to Ground.

<Parts order>

VE-30001318: DIODE BA159 1A/800V 20A VE-30001347: DIODE ZENER 8.2V

<Modification Start Date>

Service Bulletin Model:

All models with AK36 Chassis. Service

Bulletin No: 125

Priority ( )S. All product. ( )A. Items in Customer / Dealer stock / Service return goods. ( )B. Customer stock / Units returned for Service. ( )C. Sold items returned for Service. ( X )D. Only Units returned to this bulletin. ( )E. Others

SUBJECT : Q 602 defect DATE : August 07, 2002

<Objective> Please modify if following symptom occurs

<Symptom> TV does not work due to Q602 broke down

<Cause> Hor. Transistor Driving Condition during switching ON/OFF.

<Countermeasures>

After changing the defected Q602,

In order to improve Q602 resistant to sparks, modify the chassis as given below.

Solder RES CF 1/4W 10K J BETWEEN BASE AND COLLECTOR OF Q601 (Hor.driver Transistor ) as

shown in below.

<Spare Parts order>

RES CF 1/4W 10K J : VE-30000471

<Start Date of Modification on Production.> 16.08.2002





SUBJECT : Improvement against to the spike on the main supply DATE : Oct 30, 2002


<Symptom>There is no picture on the TVs.

<Cause>The spikes on the main supply are damaged to IC403 (Vertical output IC).

<Countermeasures>


Remove D409 from the chassis,

D409: DIODE 1N4148 ==> Not Connected

<Spare Parts order>

VE-30001284: DIODE 1N4148







SUBJECT : Improvement for Horizontal Size Range DATE : Nov 11, 2002


<Symptom>After changing the CRT, Hor. Size range is not correct.

<Cause>Some Component tolerances.

<Countermeasures>


Replace;

R803: RES SMD 1/10W 22K J ==> RES SMD 1/10W 22K F

R801: RES CF 1/4W 4.7K ==> RES MF 1/4W 4.7K

<Spare Parts order>

VE-30007207 : RES SMD 1/10W 22K F for R803

VE-30000983 : RES MF 1/4W 4.7K for R801



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11ak36 Tech Bulletins