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ADCOM GFA-5450,GFA-5475 USER MANUAL
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401.5 KB
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10
Category
AUDIO
USER MANUAL
AUDIO
USER MANUAL
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ADCOM GFA-5450 GFA5450 GFA5475 GFA 5450 5475 GFA-5475
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Relevant AUDIO forum topics:
Sziasztok!
Keresem a címben szereplő hangfal (32cm/400W) erősítőjének kapcsolási rajzát, vagy legalább az előerősítő IC típusát (fölrobbant, és a környező alkatrészek megégtek).
Kérem a hozzáértők segítségét!
Üdv:
Fülesmester
Given:
Victor TT-71, neon lamp does not light, speed is lower than normal. This is subsequent some short circuit the owner does inside the device. No further details.
I found out the VICTOR QL7 have the same motor driver amd I downloaded the service manual that I attached here in case this manual is not already uploaded.
Looking at the diagrams I found out that at TP3 (same with pin5 of IC803) instead if that rectangular signal, I have nothing but 5VDC and a negative or positive short spike whenever I'm starting or stopping the motor and
Under the circumstances I suspect IC803 is defective. The bad thing, IC803 is NPC SC8043. Also I wonder if the crystal is fine (except that I wonder what can be wrong with a crystal after some short circuit).
Does anybody have any more suggestion?
Also, where can NPC SC4043 be sourced? Also, a crystal 9.054MHz?
Thanks in advance,
Corneliu
Victor TT-71, neon lamp does not light, speed is lower than normal. This is subsequent some short circuit the owner does inside the device. No further details.
I found out the VICTOR QL7 have the same motor driver amd I downloaded the service manual that I attached here in case this manual is not already uploaded.
Looking at the diagrams I found out that at TP3 (same with pin5 of IC803) instead if that rectangular signal, I have nothing but 5VDC and a negative or positive short spike whenever I'm starting or stopping the motor and
Under the circumstances I suspect IC803 is defective. The bad thing, IC803 is NPC SC8043. Also I wonder if the crystal is fine (except that I wonder what can be wrong with a crystal after some short circuit).
Does anybody have any more suggestion?
Also, where can NPC SC4043 be sourced? Also, a crystal 9.054MHz?
Thanks in advance,
Corneliu
Sziasztok!
Minap került hozzám egy a címben említett "csodabogár".
A hibája az volt, hogy a jobb oldal nem szólt.
A végfok az alábbi alkatrészek cseréje után megszólalt (működik).
VT17 BC337
VT19 BC546
VR34 82ohm
VR47 4,7ohm
VR39 0,47ohm 5w
VR40 0,47ohm 5w
Na már csak annyi hibája van a jobb oldalnak, hogy hallhatóan egy kicsit halkabb + jóval kevesebb mély van mint a bal oldalnál.
+ Úgy voltam vele, ha már nálam van akkor átnézem.
A másik hibája az pedig, hogy egyig LED sem világít.
A ledeket egyesével kipróbáltam. Jók!
Az MIC05 (LM324) és a MIC11 (U237B) megkapják a 15v-ot.
Az alábbi 2 hiba felderítésében kérlek titeket 1-2 jó tippre, hogy miket nézzek át.
Sajna oszcilloszkópom az nincsen. :(
Köszönöm!
Sziasztok!
Rákötöttem a Samsung led tv-t az AUX csatornára, de folyamatosan megy a rádió halkan.Elég idegesítő filmnézés közben amikor párbeszédes rész van.Esetleg valakinek valami ötlete, hogy mi lehet a baj?
Köszönöm előre is.
Szép napot
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