Orban OPTIMOD 6200 Operating Manual page 128

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