suoer Boxen "audio pro A4-14 ": wer repariert?

[jocook]

Hallo, zusammen,

ich hatte mir in den späten 80ern 2 audio pro A4-14 und den Subwoofer audio pro B4-200 gekauft.
Leider haben die beiden Satelliten urplötzlich (hatte unerwarteten Stromausfall) danach keinen Ton mehr weitergegeben.
Wer kennt - im Großraum HAMBURG - eine seriöse Werkstatt, die mir helfen könnte?

Dank im Voraus

jocook

[monoethylene]

PPA Audio

[Der Jo]

Schon mal nach den Sicherungen geschaut ?

FAULT FINDING
A4-14 does not work
2 Set auto ON/OFF in position on
2.1 Check that both the green and red LED are lit.
2.2 Check the power fuses and fuses F601, 602, 701,702.
2.3 Measure supply voltages +33V· ~2.5, -33V ~2.5V, +15V ~2V,
-15V +2V
2.4 To localize the fault, connect test instruments as follows:
Tone generator,to J301 pins 3 and 5. Adjust till B is
42mV. Sensitivity in Max position, bass and treble
pots in center position. Compare to voltage levels according
to tayle in circuit diagram~
2.5 If fuses F601, 602, 702 blow during measurement per Section
1.4, you may disconnect the woofers and replace midrange
dirver and tweeter by 5-10 ohm resistors. Test again per
Section 1.4 (signal levels in points©®®® andQ)will of
course be different).
2.6 Auto ON/OFF can also be tested with set-up per 1.4.
- Set auto ON/OFF in AUTO.
The signal at Z201 pin 1 should be 7V p-p, and the
signal Z201 pin 7 should be 15V OC.
Relay K101 Should close at 15mV/500 Hz in
(R210 may be shunted by 100 kahm to reduce the off delay)