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| Schonz |
 Posted: Fri Nov 07, 2008 7:18 pm Post subject: Amp Doctor! Please advice. |
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Joined: 22 Oct 2008
Posts: 45
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Hi,
I just bought a Roland JC120 last week. Its very loud! Have good shimmering cleans, as u would a JC, & response well with pedals.
There r some problems, though.
- the vibrato & chorus doesn't work. i think it needs an IC replacement.
- there is a 'thud' sound, whenever U switch it on.
- there r still audible sound, from your guitar, even when the vol knob is turned to '0'.
- it eats the internal 3.15A fuses like peanuts.
Anybody out there who could diagnose this? |
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| ultraman_cosmo |
| Posted: Sat Nov 08, 2008 12:03 am Post subject: |
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Mod Squad
Joined: 29 Oct 2004
Posts: 1665
Location: Mines resort city
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Bang,
nak tanya beberapa soalan.
1. JC120 tu tahun biler yaa. kalo tak silap ada 3 version.
2. Abang pasti voltage input tranformer tu adalah 240v sama wall voltage kat malaysia. Maklumlah, jc120 ne origin dia japan.
Biasanya la kalo blow fuse kat solidstate design biasanya ada kaitan dengan tranformer or rectifier. power chip dia biasa tak mampu nak blow tube macam powertube biasa.
Bunyi thud macam hum voltage tu biasanya capasitor besar dah berumur.
| Quote: | | there r still audible sound, from your guitar, even when the vol knob is turned to '0'. |
- ada 2 chanel, yg mana satu yaaa.
- maybe amp tu pernah rosak dan diorang ada build jumper.
- atau bright cap terlalu besar.
- atau volume pot dah rosak.
Tapi aku mengakui lom pernah seumor idup gua repair ini amp, main pun jarang jarang. Pekara diatas tu adalah dari permahatian gua kepada schematic jc120 sahaja.
Thank
farid
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Maiden, loudness, ACDC, black sabath, deep purple, jimmi and vinnie moore
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| Schonz |
| Posted: Sun Nov 09, 2008 4:05 pm Post subject: |
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Joined: 22 Oct 2008
Posts: 45
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bro, klw bedalah 2 kecik, ringan, gwa dan antar kt lu skali ngan efx gwa, ari2, heheh..
Bendalah ni dapat da di-modekan jd head. dia kasi skali slave box 212. tak check plax umur dia brape tahun.. I beli coz harga dia reasonable & dari segi sound memang lazat. Biasa gwa memang x pandang solid state ni coz gwa collect tube heads. Ingatkan bole buat back-up, tp dia plax kna di back-up kan, heheh..
Kt jb ni, gwa da ada tube-tech dah, tp solid state ni, dia x main plax,. anyway, drp lu nye feedback, gwa rasa mana2 electrician bole checkan dia nye caps atau transformer kot.. |
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| ultraman_cosmo |
| Posted: Sun Nov 09, 2008 8:43 pm Post subject: |
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Mod Squad
Joined: 29 Oct 2004
Posts: 1665
Location: Mines resort city
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benda tu biasa power supply nyer problem, biasa mana mana kedai baiki hifi, electronk boleh handle.
- check the tanformer, rectifier and the cap.
- kalo abg perlukan schematic just let me know.
- gua boleh email.
- ur effect dah sampai, cuma lom ambik.
- sabtu ari tu gua kuar plak masa poslaju datang mai.
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Maiden, loudness, ACDC, black sabath, deep purple, jimmi and vinnie moore
And Now all jazz. |
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| IZZI |
| Posted: Mon Nov 10, 2008 10:02 am Post subject: |
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Joined: 11 Dec 2004
Posts: 3447
Location: Melbourne, Australia
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ni hardcore fan Neal Schon Journey ke? Fuhh Gila lah!
sorry off topic..heheh
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Gelanggang guitar : http://guitarden.starahead.com |
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| Schonz |
| Posted: Mon Nov 10, 2008 10:31 am Post subject: |
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Joined: 22 Oct 2008
Posts: 45
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budak kt poslaju pon bongok gax. gwa tanya ETA, dia kate Monday..
erm, gwa ada nak g KL 22hb.. ada pform kt KL convention center.. agax2 LS2 bole ready x? klw x sempat, xpe, jgn rushing.. gwa bole angkat Tareh nye, as a back up.. |
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| ultraman_cosmo |
| Posted: Mon Nov 10, 2008 10:37 am Post subject: |
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Mod Squad
Joined: 29 Oct 2004
Posts: 1665
Location: Mines resort city
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| Schonz wrote: | budak kt poslaju pon bongok gax. gwa tanya ETA, dia kate Monday..
erm, gwa ada nak g KL 22hb.. ada pform kt KL convention center.. agax2 LS2 bole ready x? klw x sempat, xpe, jgn rushing.. gwa bole angkat Tareh nye, as a back up.. |
Effect dah ambik pagi tadi, insyallah malam ne dignose. nanti bagi tau.
- boleh pm me ur hp. senang saya nak buat folowup.
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Maiden, loudness, ACDC, black sabath, deep purple, jimmi and vinnie moore
And Now all jazz. |
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| Schonz |
| Posted: Mon Nov 10, 2008 11:55 am Post subject: |
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Joined: 22 Oct 2008
Posts: 45
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k, da PM dah.. settle ni nanti gwa nak lu buatkan gwa 1 custom pedalboard..
killer punya..  |
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| ultraman_cosmo |
| Posted: Mon Nov 10, 2008 3:27 pm Post subject: |
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Mod Squad
Joined: 29 Oct 2004
Posts: 1665
Location: Mines resort city
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| Schonz wrote: | k, da PM dah.. settle ni nanti gwa nak lu buatkan gwa 1 custom pedalboard..
killer punya.. |
- Saya tak buat custom pedal board.
- tu abang kena tanya tolyn puchong.
- saya nyer pedal board pun beli juga... kakakakkakaka.
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Maiden, loudness, ACDC, black sabath, deep purple, jimmi and vinnie moore
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| Schonz |
| Posted: Mon Nov 10, 2008 3:52 pm Post subject: |
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Joined: 22 Oct 2008
Posts: 45
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| gwa ngat salah dtail.. bukan pedal board.. pedal stacking ataupun re-housing ataupon re-routing.. lu familiar x? kan lu ada bwatkan custom disto utk tolyn? |
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| ultraman_cosmo |
| Posted: Mon Nov 10, 2008 4:02 pm Post subject: |
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Mod Squad
Joined: 29 Oct 2004
Posts: 1665
Location: Mines resort city
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| Schonz wrote: | | gwa ngat salah dtail.. bukan pedal board.. pedal stacking ataupun re-housing ataupon re-routing.. lu familiar x? kan lu ada bwatkan custom disto utk tolyn? |
- rasanya custom distort tu izzi aka izuan yg buat.
- sebab design gua semua lom release...
- kakakaka.
- nanti kita bincang and fikirkan aper yg patut
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Maiden, loudness, ACDC, black sabath, deep purple, jimmi and vinnie moore
And Now all jazz. |
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| Schonz |
| Posted: Wed Nov 12, 2008 2:41 pm Post subject: |
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Joined: 22 Oct 2008
Posts: 45
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nanti gwa g kl nak test larh..
k, keep in touch.. |
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| IZZI |
| Posted: Wed Nov 12, 2008 3:13 pm Post subject: |
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Joined: 11 Dec 2004
Posts: 3447
Location: Melbourne, Australia
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| ultraman_cosmo wrote: | | Schonz wrote: | | gwa ngat salah dtail.. bukan pedal board.. pedal stacking ataupun re-housing ataupon re-routing.. lu familiar x? kan lu ada bwatkan custom disto utk tolyn? |
- rasanya custom distort tu izzi aka izuan yg buat.
- sebab design gua semua lom release...
- kakakaka.
- nanti kita bincang and fikirkan aper yg patut |
setakat ni dah close dari menerima tempahan. pakcik nak betapa dulu di gunung si guntang.
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Gelanggang guitar : http://guitarden.starahead.com |
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| Schonz |
| Posted: Wed Nov 12, 2008 4:14 pm Post subject: |
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Joined: 22 Oct 2008
Posts: 45
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waah klw g2, mintak2 berjaya lah e2 korg, heheh..
Izzi, klw ada stock, footswitch ke, dpdt, spdt.. lebih2.. |
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| Schonz |
| Posted: Sun Nov 16, 2008 10:27 am Post subject: |
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Joined: 22 Oct 2008
Posts: 45
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| IZZI wrote: | ni hardcore fan Neal Schon Journey ke? Fuhh Gila lah!
sorry off topic..heheh | nak dapatkan name mcm guitarist gax.. hehe. dulu mak panggil shawn.. Role model tetap Steve Stevens gax.. |
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