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MONTGOMERY WARD 14WG-740 SERIES-B SCH
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(PDF)
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120.4 KB
120.4 KB
Page
3
3
Category
AUDIO
SERVICE MANUAL
AUDIO
SERVICE MANUAL
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Good luck to the repair!
Please do not offer the downloaded file for sell only use it for personal usage!
Looking for similar montgomery manual?
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MONTGOMERY WARD 14WG740 SERIESB 14 WG 740 14WG SERIES 14WG-740 SERIES-B
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Sziasztok!
Hoztak egy fent emlitett tipusú rádíót hozzám javításra,hogy nem szól!
Mivel nem vagyok egy nagy csőves rádió szakértő így csak annyit néztem meg gyorsan,hogy a csövek vílágítanak(kivülről nézve)macska szem is világit ha hátulról belenézek,de hangot nem ad!
Szerintem a hangerőt is maximumra tekertem/állitottam de semmi reakció!
Merre induljak el esetleges hibakeresés céljából?
Köszönöm szépen a segítséget!
Hoztak egy fent emlitett tipusú rádíót hozzám javításra,hogy nem szól!
Mivel nem vagyok egy nagy csőves rádió szakértő így csak annyit néztem meg gyorsan,hogy a csövek vílágítanak(kivülről nézve)macska szem is világit ha hátulról belenézek,de hangot nem ad!
Szerintem a hangerőt is maximumra tekertem/állitottam de semmi reakció!
Merre induljak el esetleges hibakeresés céljából?
Köszönöm szépen a segítséget!
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!
Szeretnék többet megtudni a csatolmányban szereplő hallgatókról.
Teljesen újak,van több darab is.
Üdv:Geri100
Keresek Siva PPA-1600-hoz kapcsolási rajzot!
Fontos lenne,ugyanis annélkül nem tudom megjavítani!
Előre is köszi!
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