Studer 189 Quadro Service Manual 4
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Extracted text from Studer 189 Quadro Service Manual 4 (Ocr-read)
Page 2
VOLTAGE REGULATOR TYPE NU. 1.090.055
The voltage regulator 1.090.055 stabilisas the DC voltage of
24 ... 34 V supplied by the power supply unit 1.090.024.
The regulator output voltage is set at 22 Volts. It contains
electronic cut-off circuits which reducethe output voltage
should the power consumption exceed the pie-sat value (sea
graph 1) .
Technical Data
Input Voltage U i/p 24 u. 32 V DC
Output voltage
(adjustable at P3) U o/p 22 V
Max. output current
(adjustable at P2) Imax. 3 A
Short circuit quiescent current
(adjustable at Pl) 1,: = 50 ... lOD mA
Source resistance in
regulating range R1 g 10 mDhms
Ripple voltage 1' 1E 2DD/ul
Vop
[17.7
n; ='6,3mfl_ SM
19.
20 Vop (DQSJMFM) 2
y)
45 ou\p0°/
,
M U
01K 1 9- 3 1' IEA]
Graph 1, : Output voltage / Output current.