Orban OPTIMOD 6200, Operating Manual

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4-10
MAINTENANCE Orban Model 6200
WORD LEN 20bits
DITHER off
STAT BITS aes/ebu
TEST
MODE operate
BYPASS GAIN 0 dB
TONE FREQ 400Hz
TONE LVL 100%
TONE CHAN l+r
Additional Setup Settings
MAX LPF 20.0 kHz
ST CHASSIS no
MONO/ST stereo
B) Set the GND LIFT switch to the earth ground symbol setting (down position), so
that ground is connected.
C)
Press
Setup
button to access Setup menu.
D)
Press
TEST
soft key to access Test menu.
E) Recall bypass preset: Press MODE soft key, use the control knob to scroll to by-
pass
, then release the
MODE
soft key.
Bypass defeats all compression, limiting, and program equalization, but re-
tains
MAX LPF frequency setting.
2. Test D5 volt supply (Power Supply Board).
A)
Measure the +5 volt supply with the DVM. Verify the presence of +5 volts
(±0.25V).
The +5 volt digital supply appears between TP6 and ground test point TP9
on the Power Supply Board.
3. Test Analog ±15 volt supply (Power Supply Board).
A)
Measure the +15 volt supply with the DVM. Verify the presence of +15 volts
(±0.75V).
The +15 volt supply appears between TP1 and ground test point TP3 on the
Power Supply Board.
B) Using the oscilloscope, measure the total ripple and noise on the +15 volt supply.
The ripple and noise should not exceed 50mVp-p.
C)
Measure the
−
15 volt supply with the DVM. Verify the presence of
−
15 volts
(±0.75V).
The
−
15 volt supply appears between TP4 and ground test point TP3 on the
Power Supply Board.
D)
Using the oscilloscope, measure the total ripple and noise on the
−
15 volt supply.