Changing the Heating element of a ZD-915 clone gun - Page 1
Forum section: electronics / repair

author: TSCOLAN
author_rank: Contributor
timestamp: June 21, 2022, 12:17:59 pm
content: Hi,My desoldering station (a ZD-915 clone from XTREME) was stuck. I did not managed to unstuck it. Instead of buying a new gun, I ordered a new heating element on ePay.The title of the object I bought was "DESOLDER HEATING ELEMENT 78-551B ZD-985-915-987-917 220V".First, it is the right part, you can ignore that the gun is labeled 24V and the part advertised for 220V.Then, the trap I want to share is that the temperature sensor is polarized. Probably a thermocouple. If plugged reverse, the station will be stuck at 25°C and in heating mode.Thomas

author: ESXi
author_rank: Regular Contributor
timestamp: June 23, 2022, 02:39:56 pm
content: I can find two options for the ZD-915 I don't yet have the unit but I already see the old style 915 gun has some issues and still has a plastic tube solder waste chamber.So I want to buy a ZD-8915 gun (with glass tube) alone for spare so I can replace it but what is really hard to figure out is if they will work on the ZD-915 (even the web shop selling it can't tell me).You have two different styles of DIN alike connectors which are called Aviator sockets.The difference are 6 pins and one has 7 pins. I looked at the garbage manuals and was able to find only ONE in a video that showed the pin-out on yt.Here's the manual of the 7-pin Pro'sKit SS-331 gun 5SS-331N-DG (90 watts variant vs zd-915 80 watts):7 Pin connector (gun) pin-out:[pin 1 & 2] sensor (PTC/Thermistor) 50Ω±3Ω (25°C room temperature)[pin 3 & 4] heating element 2Ω±1Ω (25°C room temperature)[pin 5 & 6] trigger switch - 0Ω (trigger on)[pin 7 & 2] open or 0Ω (shaking gun) sleep tilt switch?Just measured my ZD-915 24v 80W gun,6 Pin connector (gun) pin-out:[pin 1 & 2] sensor (PTC/Thermistor) 1.6Ω(±3Ω?) (24,3°C room temperature)[pin 3 & 4] heating element 1.4Ω(±1Ω?) (24,3°C room temperature)[pin 5 & 6] trigger switch - 0Ω (trigger on, test with continuity mode)So the only difference seems to be that one model has a tilt sensor for sleep mode so it won't burn your heating element up faster and the other one just burns the heater up no sleep mode? And obviously a bigger heating element with more thermal mass and bigger heater?Can one confirm this also is it possible to use the bigger heater on the ZD-915 or the gun from the ZD-8915 (SS-331) on the ZD-915, because there seems to be an option to order ZD-8915 gun with 6 pin and 7 pin aviator connector.It would be cool if one can answer the question, because I don't know there are so many rebrands and make and models none of them describe it properly or have a nice detailed manual..

author: deezdrama
author_rank: Contributor
timestamp: December 10, 2022, 04:53:59 pm
content: Quote from: ESXi on June 23, 2022, 02:39:56 pmDid you ever try to use the new style heating element?I cant believe no one has tried using the new proskit gun on the older zd-915.Ive had my zd-915 for a couple years and it has worked great but wanted to get an extra heating element incase mine goes bad. Im unable to find any spare parts for the zd915 now.I want to order the new black/green proskit gun and remove the 7 pin connector and install the 6 pin connector but not sure if it is 100% compatible with the power supply base station of the zd915

author: bastl_r
author_rank: Regular Contributor
timestamp: December 11, 2022, 04:17:22 am
content: HiYou can also look for ZD917 or ZD552.https://www.ebay.de/b/Zd-917/bn_7005775587