HP 30s screen & brain have been water-damaged, but I enjoyed this calculator
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From: Merciadri Luca on 15 May 2010 10:11 On May 15, 3:13 pm, ChrisCoaster <ckozi...(a)snet.net> wrote: > On May 15, 7:21 am, Merciadri Luca <merciadril...(a)gmail.com> wrote: > > > On May 15, 3:59 am, ChrisCoaster <ckozi...(a)snet.net> wrote:> In hindsight, no buttons should have been pressed even after you wiped > > > off the exterior of the calculator. That is - no circuits should have > > > been allowed to complete - what happens when you press buttons on the > > > calc. The calc should be dismantled - if readily so - and allowed to > > > dry under a bright lamp or the sun. Reassemble and it *should* work > > > like new. That was all that was spilt on it - water? > > > Yes, only water. The problem is that water was spilt on it not only > > all over one face, but over both faces. > > > After having opened it, etc., I also realized that the main board is > > slightly broken at its end: some circuitry portion is raised upward, > > showing some slight damage, probably done with a screwdriver. I assume > > that the whole stuff was sticking out because after having opened the > > calculator (to see this and to check connections) and closed it, it > > does not work anymore. I re-opened it, did my best to join both parts, > > but it does not want to work anymore. Is it ready for the trash? It > > only shows slight damage. > > > Thanks. > > _______________ > That slight damage to the circuitry may be all it takes. The width of > the paths of those ciruits is designed to carry specific voltages with > a specific resistance. If one is cut even slightly through the proper > voltage(signal) will not reach its intended destination. That is all > I know about that and someone else may have a better answer. > > In addition, they may also have a better answer than the one already > provided to the problem I posted about my JVC VHS-DVD combo video > heads(!) Thanks. I'll wait for other messages. Such a pity. I liked this calculator :(
From: Michael Kennedy on 15 May 2010 12:47 "Merciadri Luca" <merciadriluca(a)gmail.com> wrote in message news:b42a07c5-152a-468a-be79-253570ea3167(a)p17g2000vbe.googlegroups.com... On May 15, 3:13 pm, ChrisCoaster <ckozi...(a)snet.net> wrote: > On May 15, 7:21 am, Merciadri Luca <merciadril...(a)gmail.com> wrote: > > > On May 15, 3:59 am, ChrisCoaster <ckozi...(a)snet.net> wrote:> In > > hindsight, no buttons should have been pressed even after you wiped > > > off the exterior of the calculator. That is - no circuits should have > > > been allowed to complete - what happens when you press buttons on the > > > calc. The calc should be dismantled - if readily so - and allowed to > > > dry under a bright lamp or the sun. Reassemble and it *should* work > > > like new. That was all that was spilt on it - water? > > > Yes, only water. The problem is that water was spilt on it not only > > all over one face, but over both faces. > > > After having opened it, etc., I also realized that the main board is > > slightly broken at its end: some circuitry portion is raised upward, > > showing some slight damage, probably done with a screwdriver. I assume > > that the whole stuff was sticking out because after having opened the > > calculator (to see this and to check connections) and closed it, it > > does not work anymore. I re-opened it, did my best to join both parts, > > but it does not want to work anymore. Is it ready for the trash? It > > only shows slight damage. > > > Thanks. > > _______________ > That slight damage to the circuitry may be all it takes. The width of > the paths of those ciruits is designed to carry specific voltages with > a specific resistance. If one is cut even slightly through the proper > voltage(signal) will not reach its intended destination. That is all > I know about that and someone else may have a better answer. > > In addition, they may also have a better answer than the one already > provided to the problem I posted about my JVC VHS-DVD combo video > heads(!) Thanks. I'll wait for other messages. Such a pity. I liked this calculator :( Do you have a soldering iorn? If so you can fix the broken traces. It isn't that complicated with a little practice.. Maybe someone around here knows a good website for soldering techniques. Or just serarch the history of this group. It has been discussed many times. Best of luck. Mike
From: Merciadri Luca on 15 May 2010 14:11 On May 15, 7:12 pm, Jeff Liebermann <je...(a)cruzio.com> wrote: > On Sat, 15 May 2010 03:58:41 -0700 (PDT), Merciadri Luca > > <merciadril...(a)gmail.com> wrote: > >> Tear them apart and clean the guts with a dry paint brush. It > >> probably has some corrosion damage from the soaking. > >Done, nothing better. > > Did you actually take it apart? Yes, if taking apart means disassembling. > Here are HP's useless disassembly > instructions (for recyclers): > <http://www.hp.com/hpinfo/globalcitizenship/environment/productdata/Co...> Thanks. > Try washing it again with CLEAN water to remove any contaminants and > salt crud. Use a paint brush for cleaning. Use an air compressor and > air gun to blow off as much water as possible. Let air dry for at > least 24 hours. Try again. I'll try, but the broken board is surely not going to be influenced in some better way by this. > > >> Also, there are 8ea HP-30s calculators on eBay for an average prices > >> of about $15/ea. > >Yeah, I know, but I even have a HP-50g, which is clearly better. That > >is not the problem. The problem is that I like(d) this calculator. > > Yech. It's really an HP relabeled Kinpo calculator. > <http://www.rskey.org/detail.asp?manufacturer=Hewlett-Packard&model=HP...> > There's no exact equivalent but this is close: > <http://www.kinpo.com.tw/English/Calculator.htm#sr19d1> > > This self test might be useful: > <http://www.rskey.org/~mwsebastian/selftest/hp_test.htm#hp30s> Thanks. If it ever works again, I'll try it. The problem is that, as written before, my calculator won't power on anymore, surely because of the broken board. The screen problem was, considering http://www.rskey.org/images/large/hp30s..jpg that, at the place of the `6' I was only getting something like `|'.
From: Merciadri Luca on 15 May 2010 14:14 On May 15, 6:47 pm, "Michael Kennedy" <m...(a)nospam.com> wrote: > "Merciadri Luca" <merciadril...(a)gmail.com> wrote in message > > news:b42a07c5-152a-468a-be79-253570ea3167(a)p17g2000vbe.googlegroups.com... > On May 15, 3:13 pm, ChrisCoaster <ckozi...(a)snet.net> wrote: > > > On May 15, 7:21 am, Merciadri Luca <merciadril...(a)gmail.com> wrote: > > > > On May 15, 3:59 am, ChrisCoaster <ckozi...(a)snet.net> wrote:> In > > > hindsight, no buttons should have been pressed even after you wiped > > > > off the exterior of the calculator. That is - no circuits should have > > > > been allowed to complete - what happens when you press buttons on the > > > > calc. The calc should be dismantled - if readily so - and allowed to > > > > dry under a bright lamp or the sun. Reassemble and it *should* work > > > > like new. That was all that was spilt on it - water? > > > > Yes, only water. The problem is that water was spilt on it not only > > > all over one face, but over both faces. > > > > After having opened it, etc., I also realized that the main board is > > > slightly broken at its end: some circuitry portion is raised upward, > > > showing some slight damage, probably done with a screwdriver. I assume > > > that the whole stuff was sticking out because after having opened the > > > calculator (to see this and to check connections) and closed it, it > > > does not work anymore. I re-opened it, did my best to join both parts, > > > but it does not want to work anymore. Is it ready for the trash? It > > > only shows slight damage. > > > > Thanks. > > > _______________ > > That slight damage to the circuitry may be all it takes. The width of > > the paths of those ciruits is designed to carry specific voltages with > > a specific resistance. If one is cut even slightly through the proper > > voltage(signal) will not reach its intended destination. That is all > > I know about that and someone else may have a better answer. > > > In addition, they may also have a better answer than the one already > > provided to the problem I posted about my JVC VHS-DVD combo video > > heads(!) > > Thanks. I'll wait for other messages. Such a pity. I liked this > calculator :( > > Do you have a soldering iorn? If so you can fix the broken traces. It isn't > that complicated with a little practice.. > > Maybe someone around here knows a good website for soldering techniques. Or > just serarch the history of this group. It has been discussed many times. Thanks. I'll try to get one, and to make it work. But chances to succeed seem to be very low: this is a thin board, just like there: http://alexpb.com/notes/wp-content/uploads/2008/12/keyboard_electronic_board_2resized.jpg (where some conducting `lines' [sorry, i'm such a newbie in this] have been broken).
From: Merciadri Luca on 16 May 2010 12:38
On May 15, 8:14 pm, Merciadri Luca <merciadril...(a)gmail.com> wrote: > On May 15, 6:47 pm, "Michael Kennedy" <m...(a)nospam.com> wrote: > > > "Merciadri Luca" <merciadril...(a)gmail.com> wrote in message > > >news:b42a07c5-152a-468a-be79-253570ea3167(a)p17g2000vbe.googlegroups.com.... > > On May 15, 3:13 pm, ChrisCoaster <ckozi...(a)snet.net> wrote: > > > > On May 15, 7:21 am, Merciadri Luca <merciadril...(a)gmail.com> wrote: > > > > > On May 15, 3:59 am, ChrisCoaster <ckozi...(a)snet.net> wrote:> In > > > > hindsight, no buttons should have been pressed even after you wiped > > > > > off the exterior of the calculator. That is - no circuits should have > > > > > been allowed to complete - what happens when you press buttons on the > > > > > calc. The calc should be dismantled - if readily so - and allowed to > > > > > dry under a bright lamp or the sun. Reassemble and it *should* work > > > > > like new. That was all that was spilt on it - water? > > > > > Yes, only water. The problem is that water was spilt on it not only > > > > all over one face, but over both faces. > > > > > After having opened it, etc., I also realized that the main board is > > > > slightly broken at its end: some circuitry portion is raised upward, > > > > showing some slight damage, probably done with a screwdriver. I assume > > > > that the whole stuff was sticking out because after having opened the > > > > calculator (to see this and to check connections) and closed it, it > > > > does not work anymore. I re-opened it, did my best to join both parts, > > > > but it does not want to work anymore. Is it ready for the trash? It > > > > only shows slight damage. > > > > > Thanks. > > > > _______________ > > > That slight damage to the circuitry may be all it takes. The width of > > > the paths of those ciruits is designed to carry specific voltages with > > > a specific resistance. If one is cut even slightly through the proper > > > voltage(signal) will not reach its intended destination. That is all > > > I know about that and someone else may have a better answer. > > > > In addition, they may also have a better answer than the one already > > > provided to the problem I posted about my JVC VHS-DVD combo video > > > heads(!) > > > Thanks. I'll wait for other messages. Such a pity. I liked this > > calculator :( > > > Do you have a soldering iorn? If so you can fix the broken traces. It isn't > > that complicated with a little practice.. > > > Maybe someone around here knows a good website for soldering techniques.. Or > > just serarch the history of this group. It has been discussed many times. > > Thanks. I'll try to get one, and to make it work. But chances to > succeed seem to be very low: this is a thin board, just like there:http://alexpb.com/notes/wp-content/uploads/2008/12/keyboard_electroni... > (where some conducting `lines' [sorry, i'm such a newbie in this] have > been broken). Okay, you might check http://www.student.montefiore.ulg.ac.be/~merciadri/hp30s_broken/dsc01473.jpg (broken board) http://www.student.montefiore.ulg.ac.be/~merciadri/hp30s_broken/dsc01476.jpg (ditto) http://www.student.montefiore.ulg.ac.be/~merciadri/hp30s_broken/dsc01477.jpg (ditto) http://www.student.montefiore.ulg.ac.be/~merciadri/hp30s_broken/dsc01478.jpg (red conn ok) http://www.student.montefiore.ulg.ac.be/~merciadri/hp30s_broken/dsc01479.jpg (ditto) http://www.student.montefiore.ulg.ac.be/~merciadri/hp30s_broken/dsc01480.jpg (black conn ok) http://www.student.montefiore.ulg.ac.be/~merciadri/hp30s_broken/dsc01481.jpg (ditto) http://www.student.montefiore.ulg.ac.be/~merciadri/hp30s_broken/dsc01482.jpg (screen ok) http://www.student.montefiore.ulg.ac.be/~merciadri/hp30s_broken/dsc01483.jpg (ditto) for pictures of the problem. I could use a soldering iron, but would it ever come it to life? |