LabGruppen Service_Bulletin_2011_no_23_NTC_measurement_on_PLM20000Q电路图.pdf

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1、 Document type: Created: Page: SERVICE BULLETIN (2011-11-10) Page 1 of 11 THIS DOCUMENT IS CONFIDENTIAL. IT MAY NOT BE REPRODUCED WITHOUT THE WRITTEN PERMISSION OF LAB.GRUPPEN AB AND TC Electronic A/S 2011 Lab.gruppen AB, Faktorvgen 1, S-434 44 KUNGSBACKA, SWEDEN |. Technical Service Bulletin No. 23

2、 Created by: Lab.gruppen AB Service Department Date: 2011-11-02 Reference no: Measure for broken NTC in DC/DC on SP200PCF It is highly recommended to implement this service bulletin as preventative maintenance if the unit is serviced for another issue. Affected models PLM20000Q Affected boards/modul

3、es Describe which boards/modules this technical issue affects. SP200PFC07e-F01 SP200PFC08a-F01 SP200PFC08c-F01 SP200PFC08d-F01 SP200PFC08e-F01 SP200PFC08f-F01 SP200PFC08g-F01 SP200PFC08h-F01 SP200PFC08i-F01 SP200PFC08j-F01 SP200PFC08k-F01 SP200PFC08l-F01 SP200PFC09b-F01 SP200PFC09c-F01 SP200PFC09e-F

4、01 SP200PFC09g-F01 SP200PFC09h-F01 Symptom Firmware will tolerate 1 out of the 3 NTC in the DC/DC to be broken without displaying a fault message, thats why all three NTCs need to be measured every time the unit is in for service. If more than 1 NTC in the DC/DC is broken, or if any of the other NTC

5、s are broken (there is a total of 7 on SP200PFC), the following fault message will be displayed on the front panel of the PLM: “NEED SERVICE:6” RadioFans.CN 收音机爱 好者资料库 Document type: Created: Page: SERVICE BULLETIN (2011-11-10) Page 2 of 11 THIS DOCUMENT IS CONFIDENTIAL. IT MAY NOT BE REPRODUCED WIT

6、HOUT THE WRITTEN PERMISSION OF LAB.GRUPPEN AB AND TC Electronic A/S 2011 Lab.gruppen AB, Faktorvgen 1, S-434 44 KUNGSBACKA, SWEDEN |. Solution Ohm measure NTC601, NTC702 and NTC802. If outside 18-20kOhm at room temperature, the NTC need to be replaced. Instructions Needed material Part No. Descripti

7、on Amount Info Pos NTC100KPEFILM Resistor Ntc 100k Pe Film 1 - 3 Measure NTC601, NTC702, NTC802 ISSR28x15AD Insulator Silicon Rubber 28x15mm Adhesive 1 - 3 On Cooler TSK.075x12 Tape Selfadhesive Kapton 0.075x12mm Tape Actions Info Pos 1. Amplifier mains plug disconnected. Wait 10 minutes in order to

8、 let the capacitors discharge. Observe! Do not touch PCB without being ESD-protected. 2. Remove screws from the rear panel. RadioFans.CN 收音机爱 好者资料库 Document type: Created: Page: SERVICE BULLETIN (2011-11-10) Page 3 of 11 THIS DOCUMENT IS CONFIDENTIAL. IT MAY NOT BE REPRODUCED WITHOUT THE WRITTEN PER

9、MISSION OF LAB.GRUPPEN AB AND TC Electronic A/S 2011 Lab.gruppen AB, Faktorvgen 1, S-434 44 KUNGSBACKA, SWEDEN |. 3. Remove screws from the side panels. 4. Remove screws from the top and bottom covers. Remove the covers. 5. At room temperature, Ohm measure; NTC601, NTC702, NTC802 18kOhm to 20kOhm Ov

10、erview SP200 of which region of the board. RadioFans.CN 收音机爱 好者资料库 Document type: Created: Page: SERVICE BULLETIN (2011-11-10) Page 4 of 11 THIS DOCUMENT IS CONFIDENTIAL. IT MAY NOT BE REPRODUCED WITHOUT THE WRITTEN PERMISSION OF LAB.GRUPPEN AB AND TC Electronic A/S 2011 Lab.gruppen AB, Faktorvgen 1

11、, S-434 44 KUNGSBACKA, SWEDEN |. Example OK measurement of NTC702 on a Rev8 SP200 Rev 7 and 8 Rev 9 Ohm measure Ohm measure Document type: Created: Page: SERVICE BULLETIN (2011-11-10) Page 5 of 11 THIS DOCUMENT IS CONFIDENTIAL. IT MAY NOT BE REPRODUCED WITHOUT THE WRITTEN PERMISSION OF LAB.GRUPPEN A

12、B AND TC Electronic A/S 2011 Lab.gruppen AB, Faktorvgen 1, S-434 44 KUNGSBACKA, SWEDEN |. 6. If any of NTC601, NTC702, NTC802 does not pass 18- 20kOhm at room temperature, this NTC needs to be exchanged. 1.1 The following is an example on how to exchange NTC702 (exactly the same for NTC601 or NTC802

13、 on either side). 7. Remove laminate. Document type: Created: Page: SERVICE BULLETIN (2011-11-10) Page 6 of 11 THIS DOCUMENT IS CONFIDENTIAL. IT MAY NOT BE REPRODUCED WITHOUT THE WRITTEN PERMISSION OF LAB.GRUPPEN AB AND TC Electronic A/S 2011 Lab.gruppen AB, Faktorvgen 1, S-434 44 KUNGSBACKA, SWEDEN

14、 |. 8. Use a flat screwdriver. 9. Put it behind the clip and the aluminum cooler, and bend carefully. NTC CLIP Document type: Created: Page: SERVICE BULLETIN (2011-11-10) Page 7 of 11 THIS DOCUMENT IS CONFIDENTIAL. IT MAY NOT BE REPRODUCED WITHOUT THE WRITTEN PERMISSION OF LAB.GRUPPEN AB AND TC Elec

15、tronic A/S 2011 Lab.gruppen AB, Faktorvgen 1, S-434 44 KUNGSBACKA, SWEDEN |. Document type: Created: Page: SERVICE BULLETIN (2011-11-10) Page 8 of 11 THIS DOCUMENT IS CONFIDENTIAL. IT MAY NOT BE REPRODUCED WITHOUT THE WRITTEN PERMISSION OF LAB.GRUPPEN AB AND TC Electronic A/S 2011 Lab.gruppen AB, Fa

16、ktorvgen 1, S-434 44 KUNGSBACKA, SWEDEN |. 10. Now the NTC is free, and can be exchanged if needed. The NTC shall be soldered straight so it can be placed flat against the cooler. Put the PLM on the side, so that you can heat on the backside of the PCB and pull out the NTC at the same time. Confirm

17、that the exchange NTC is OK. Unmounted and in room-temperature it shall measure 100kOhm (due to lack of biasing). NTC Document type: Created: Page: SERVICE BULLETIN (2011-11-10) Page 9 of 11 THIS DOCUMENT IS CONFIDENTIAL. IT MAY NOT BE REPRODUCED WITHOUT THE WRITTEN PERMISSION OF LAB.GRUPPEN AB AND

18、TC Electronic A/S 2011 Lab.gruppen AB, Faktorvgen 1, S-434 44 KUNGSBACKA, SWEDEN |. 11. Mount the adhesive silicone sheet on the cooler where the NTC is going to be mounted (fold around edge). 12. Place the NTC resistor against silicon sheet. NTC Document type: Created: Page: SERVICE BULLETIN (2011-

19、11-10) Page 10 of 11 THIS DOCUMENT IS CONFIDENTIAL. IT MAY NOT BE REPRODUCED WITHOUT THE WRITTEN PERMISSION OF LAB.GRUPPEN AB AND TC Electronic A/S 2011 Lab.gruppen AB, Faktorvgen 1, S-434 44 KUNGSBACKA, SWEDEN |. 13. Mount specified tape to fixate the NTC. Tape 14. Observe that the clip needs to be

20、 mounted with the soft side towards the NTC. Soft side towards NTC Document type: Created: Page: SERVICE BULLETIN (2011-11-10) Page 11 of 11 THIS DOCUMENT IS CONFIDENTIAL. IT MAY NOT BE REPRODUCED WITHOUT THE WRITTEN PERMISSION OF LAB.GRUPPEN AB AND TC Electronic A/S 2011 Lab.gruppen AB, Faktorvgen

21、1, S-434 44 KUNGSBACKA, SWEDEN |. 15. Assemble clip on this side with the foam first. 16. Then the other side. 17. Reverse actions 5-6 and 4 to 2. Service Log Information Write “Technical Service Bulletin no.23” in column “Repair Remedy” besides other normal repair information. History Date Created By Status Bulletin no. Comment 20111102 DABER SHARP Soft side towards NTC