Comments on: Desk Caller ID Telephone Repaired- MODEL: GEEPAS GTP7212 https://jestineyong.com/desk-caller-id-telephone-repaired-model-geepas-gtp7212/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Tue, 18 Dec 2018 01:38:33 +0000 hourly 1 https://wordpress.org/?v=5.4.19 By: beh https://jestineyong.com/desk-caller-id-telephone-repaired-model-geepas-gtp7212/comment-page-1/#comment-348415 Tue, 18 Dec 2018 01:38:33 +0000 https://jestineyong.com/?p=18416#comment-348415 In reply to Robert Calk Jr..

GOOD to know this.

Likes(0)Dislikes(0)
]]> By: Robert Calk Jr. https://jestineyong.com/desk-caller-id-telephone-repaired-model-geepas-gtp7212/comment-page-1/#comment-348399 Mon, 17 Dec 2018 12:37:32 +0000 https://jestineyong.com/?p=18416#comment-348399 In reply to beh.

I do have one, Beh. I have had it for a long time.

Likes(0)Dislikes(0)
]]> By: beh https://jestineyong.com/desk-caller-id-telephone-repaired-model-geepas-gtp7212/comment-page-1/#comment-348389 Mon, 17 Dec 2018 07:47:42 +0000 https://jestineyong.com/?p=18416#comment-348389 In reply to Yogesh Panchal.

You are welcome Yogesh.

Likes(0)Dislikes(0)
]]> By: beh https://jestineyong.com/desk-caller-id-telephone-repaired-model-geepas-gtp7212/comment-page-1/#comment-348386 Mon, 17 Dec 2018 04:48:30 +0000 https://jestineyong.com/?p=18416#comment-348386 In reply to Robert Calk Jr..

Hi Robert
I recommend you to get one of these DY tester .is cheap but is a great tester in our job.
cheers
beh

Likes(0)Dislikes(0)
]]> By: Yogesh Panchal https://jestineyong.com/desk-caller-id-telephone-repaired-model-geepas-gtp7212/comment-page-1/#comment-348356 Sun, 16 Dec 2018 16:20:47 +0000 https://jestineyong.com/?p=18416#comment-348356 Good job! Beh

Likes(0)Dislikes(0)
]]> By: beh https://jestineyong.com/desk-caller-id-telephone-repaired-model-geepas-gtp7212/comment-page-1/#comment-348339 Sun, 16 Dec 2018 11:55:07 +0000 https://jestineyong.com/?p=18416#comment-348339 In reply to Albert van Bemmelen.

Thanks Albert.

Likes(1)Dislikes(0)
]]> By: Robert Calk Jr. https://jestineyong.com/desk-caller-id-telephone-repaired-model-geepas-gtp7212/comment-page-1/#comment-348334 Sun, 16 Dec 2018 09:33:03 +0000 https://jestineyong.com/?p=18416#comment-348334 In reply to Albert van Bemmelen.

That is what I found out Albert when I got readings on my bad TVS diodes. Thanks for letting us know that we can check them with our DY294's. After studying the datasheets more, I figured that an insulation tester might check the TVS. But these 0402 TVS's are so tiny I decided not to try and test them with them. I guess I need to build some probes especially for my DY294 so I can test tiny SMD's.

Likes(1)Dislikes(0)
]]> By: beh https://jestineyong.com/desk-caller-id-telephone-repaired-model-geepas-gtp7212/comment-page-1/#comment-348318 Sun, 16 Dec 2018 02:20:45 +0000 https://jestineyong.com/?p=18416#comment-348318 In reply to Mark.

MARK
I am happy you find this report useful .you are welcome .
beh

Likes(0)Dislikes(0)
]]> By: Robert Calk Jr. https://jestineyong.com/desk-caller-id-telephone-repaired-model-geepas-gtp7212/comment-page-1/#comment-348315 Sat, 15 Dec 2018 23:32:50 +0000 https://jestineyong.com/?p=18416#comment-348315 In reply to beh.

None of my meters will test one either. I found a couple of bad 0402 bi-directional TVS diodes in a Kindle a while back because it did show a reading with my VOM. The new ones that I bought #LXES15AAA1-133 show no readings with any of my meters.

Likes(0)Dislikes(0)
]]> By: Albert van Bemmelen https://jestineyong.com/desk-caller-id-telephone-repaired-model-geepas-gtp7212/comment-page-1/#comment-348307 Sat, 15 Dec 2018 20:14:16 +0000 https://jestineyong.com/?p=18416#comment-348307 In reply to beh.

Just use the terrific DY294 tester Beh! My P6KE150 unidirection (one direction only) did perfectly limit the voltage to about 150V when inserted between Emitter and Collector of the meter and tested on DC 1000V scale. In the other direction the display shows only 000 Volts.
So just use the DY294 which also limits the current while testing and so saves the Diode from destroying at Avalanche currents. A standard DMM only can show if the diode is a defective shorting diode.

Likes(1)Dislikes(0)
]]>