Audiolab 8000S Service Manual page 8

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