Audiolab 8000S - Page 8

8
4.0 functional tests
No
4.2.10.
4.2.11.
4.2.12.
4.2.13.
4.2.14.
4.2.15.
4.2.16.
4.2.17.
Action
Measure right
channel supply
rails
Check
preamplifier
supply rails
Left channel
Check power
amplifier
Left channel
Measure
amplifier offset
Left channel
Measure
preamplifier
Right channel
Check power
amplifier
Right channel
Measure
amplifier offset
Right channel
Measure
preamplifier
Test Equipment
Multimeter set to
V DC
Multimeter set to
V DC
Multimeter set to
V DC
Multimeter set to
mV DC
Multimeter set to
V DC
Multimeter set to
V DC
Multimeter set to
mV DC
Multimeter set to
V DC
Details
Measure voltage across D813 (TP 3+ and
TP 3-) and D814 (TP 4+ and TP 4-).
Volatge should be 32 V ±0.25 V.
Connect negative probe to 0 V (TP 0).
Connect positive probe to 30 V test
point (TP 19).
Voltage should be 28 V ±3 V.
Connect positive probe to 10 V test
point (TP 15).
Voltage should be 10 V ±0.3 V.
Connect positive probe to 5 V test
point (TP 16).
Voltage should be 5 V ±0.3 V.
Measure voltage across R731 (TP 5+
and TP 5-).
Voltage should be 0.85 V ±0.1 V.
Measure voltage across R735 (TP 6+
and TP 6-).
Voltage should be 0.85 V ±0.1 V.
Connect negative probe to 0 V (TP 0).
Connect positive probe to R749 (TP 9).
Voltage should be <5 mV.
Connect positive probe to R518 (TP 12).
Voltage should be 14 V ±1 V.
Measure voltage across R831 (TP 7+
and TP 7-).
Voltage should be 0.85 V ±0.1 V.
Measure voltage across R835 (TP 8+
and TP 8-).
Voltage should be 0.85 V ±0.1 V.
Connect negative probe to 0 V (TP 0).
Connect positive probe to R849 (TP 10).
Voltage should be <5 mV.
Connect positive probe to R618 (TP 13).
Voltage should be 14 V ±1 V.
4.2 Functional test procedure
For test point (TP) references, see section 6.0 Test Points.