Victor 88C Teardown - Page 1
Forum section: electronics / testgear

author: Pedram
author_rank: Regular Contributor
timestamp: September 01, 2014, 05:55:17 pm
content: Hi,here is my Victor 88C DMM teardown.Specs:http://www.china-victor.com/english/en/product_data.aspx?ClassID=168&ID=303the price on Ebay and Aliexpress is about $50, but as far as i know the actual price is about $35.EbayAliExpressif you dig enough. you can find as cheap as $35note that this unit is used for 2 years and it's not new.unfortunately i don't have any more accurate source to check the accuracy.here is the DMM:excuse my messy deskback:it has Inductance,Capacitance,Resistance,Voltage,Ampere,Temperature and Frequency meter. also the useless hfe...3.5 digit display with backlight on:it uses a single 9V battery:it's possible to replace the battery with removing single screw.4 self tapper screws and ... we are inback cover is shieldeddual U channel slotHand soldered ?undo 4 screws around the LCD and lift the board ...two board construction20A ceramic fuse for Amp range and a 400ma Poly Fuse for mA range.single piece input jackInput protection circuitsqueezed transistor6 calibration pot.... meh...LM358TL072CHEF4066BTHEF4093BTTL062CNothing interesting under second PCBexcept.... another squeezed transistor..LCD is connected to the board with 4 screws and a zebra strip. LCD backlight is directly soldered. but it's possible to flip it gently . ..... 3 more trim pot.....and of course .... chip on board...(AME7106?)TL062C*2 and74HC14Dmore resolution:http://imgur.com/a/ZmAToend.(sorry for my english)it's not a bad meter for the price... especially inductance meter come in handy sometimes.hope you enjoyed it

author: Maxlor
author_rank: Frequent Contributor
timestamp: September 01, 2014, 10:32:17 pm
content: Thanks for the pictures. The switches seem unusual for a multimeter, unusually expensive. Are they all momentary?

author: Pedram
author_rank: Regular Contributor
timestamp: September 02, 2014, 03:35:05 am
content: Quote from: Maxlor on September 01, 2014, 10:32:17 pmbacklight and peak hold are momentarypower and AC/DC are toggle switches.

author: Vgkid
author_rank: Super Contributor
timestamp: September 02, 2014, 04:50:47 am
content: Thanks for the teardown, those poor bunched up transistors.

author: retiredcaps
author_rank: Super Contributor
timestamp: September 02, 2014, 05:03:47 am
content: Thanks for the teardown. Interesting combination of through hole and SMD. I'm surprised to see input protection.

author: Pedram
author_rank: Regular Contributor
timestamp: September 02, 2014, 05:35:30 am
content: What is this yellow thing ? spark gap ? gas discharge tube ? or simply a cap ?(marked as C2* on top right)

author: Vgkid
author_rank: Super Contributor
timestamp: September 02, 2014, 05:57:46 am
content: that is interesting, as the smd C2 is missing.

author: kwallen
author_rank: Contributor
timestamp: September 02, 2014, 07:08:22 am
content: Quote from: Pedram on September 02, 2014, 05:35:30 amIt's a polyester film capacitor. Looks different because it doesn't have an opaque dip like most of the ones you'll see do.

author: Pedram
author_rank: Regular Contributor
timestamp: September 02, 2014, 01:34:30 pm
content: meh......i thought it's something interesting

author: alimirjamali
author_rank: Regular Contributor
timestamp: September 02, 2014, 02:24:27 pm
content: Quote from: Pedram on September 01, 2014, 05:55:17 pmThank you very much for sharing the tear down photos. By the way, thecurrent priceat Tehran's Amjad Electronics Bazaar is IRR 900k (less than $30).

author: Pedram
author_rank: Regular Contributor
timestamp: September 02, 2014, 03:17:40 pm
content: Quote from: alimirjamali on September 02, 2014, 02:24:27 pmas far as i'm aware electronic equipments are imported with government's dollars (what is the correct english word for 'Arze Dolati'?! ) which is ~ IRR 26k per one USD. so IRR900k/26 = ~35USD... maybe i'm wrong. i bought my unit 2-3 years ago.

author: alimirjamali
author_rank: Regular Contributor
timestamp: September 02, 2014, 04:12:34 pm
content: Quote from: Pedram on September 02, 2014, 03:17:40 pmBased on a previous personal experiment, I am almost sure that subsidized governmental exchange is not allocated for Electronics Testing and Measurement equipment. In addition to that, thecurrent Customs Tarifffor digital multi-meters (HS-Code 90303100) is 15%. If we add shipment costs, importer margin and retail sales margin to that, the price should be much higher.Maybe the whole batch of this multimeter was imported before 2012 currency downfall (Iranian year 1390) during the time that each US$ value was around IRR 12k.

author: Veka
author_rank: Newbie
timestamp: March 09, 2015, 07:23:08 am
content: Hello.I have a problem and I hope you can help me to solve it. I have the same instrument and it got wet, as I opened it to dry it I accidentally messed the contacts up. Could you please send me pictures of the contacts configuration like on this pic (), but from bellow.

author: Pedram
author_rank: Regular Contributor
timestamp: March 22, 2015, 06:35:35 pm
content: Quote from: Veka on March 09, 2015, 07:23:08 amCheck this:http://monitor.espec.ws/section30/topic132428.html

author: paralaxx
author_rank: Newbie
timestamp: December 05, 2016, 06:04:17 pm
content: Friends, prompt please the big resistor nominal which is outlined red on a photo and what fuse is set near it?at me these details blew up.