Audiolab 8000S Service Manual
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Audiolab 8000S Service Manual

Integrated amplifier
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Summary of Contents for Audiolab 8000S

  • Page 2: Table Of Contents

    7.11 Relay coils schematic (SCH26701-05-01) ..........27 7.12 Front panel schematic (SCH26702-01-01) ..........28 7.13 Speaker outputs schematic (SCH26703-01-01) ..........29 printed circuit board layout Printed circuit board layout (top view)............30 Printed circuit board layout (bottom view)..........31 9.0 technical data 8000S Technical specifications ..............32 International standards ................34...

  • Page 3: Safety And Servicing Notes

    1.0 s a fe t y a n d s e r v i c i n g n o t e s Safety precautions This unit is Class II, which means that it is not connected to the protective earth system. All live voltages are insulated from the case by double insulation.
  • Page 4 1.0 s a fe t y a n d s e r v i c i n g n o t e s Apply soldering iron to both component lead and pad before applying solder. Make sure that the soldering iron is applied long enough for the solder to wet properly, but do not apply for too long or component damage may occur.

  • Page 6: Functional Tests

    4.0 f u n c t i o n a l t e s t s These notes are provided to assist you in servicing the amplifier. The circuit schematics are marked with typical voltage levels, which may assist in defining the cause of any problem. Test equipment required Equipment Specification...

  • Page 7: Functional Test Procedure

    4.0 f u n c t i o n a l t e s t s Functional test procedure For test point (TP) references, see section 6.0 Test Points. Action Test Equipment Details 4.2.1. Disconnect all cables from amplifier 4.2.2. Check voltage Read ratings label on rear of amplifier.
  • Page 8 4.0 f u n c t i o n a l t e s t s Functional test procedure For test point (TP) references, see section 6.0 Test Points. Action Test Equipment Details 4.2.10. Measure right Multimeter set to Measure voltage across D813 (TP 3+ and channel supply V DC...
  • Page 9 4.0 f u n c t i o n a l t e s t s Functional test procedure For test point (TP) references, see section 6.0 Test Points. Action Test Equipment Details 4.2.18. Measure offset Multimeter set to Connect positive probe to cathode of D943 of protection mV DC 11).
  • Page 10 4.0 f u n c t i o n a l t e s t s Functional test procedure For test point (TP) references, see section 6.0 Test Points. Action Test Equipment Details 4.2.27. Left channel Multimeter set to Connect negative probe to 0 V Measure mV DC Connect positive probe to R749...

  • Page 11: Performance Tests

    5.0 p e r fo r m a n c e t e s t s 5.1. Test equipment required Equipment Specification True RMS multimeter Accuracy better than 0.5% in V and mV ranges Audio analyser Able to measure • distortion to 0.001% with 200Hz high pass filter •...

  • Page 12: Performance Test Procedure

    5.0 p e r fo r m a n c e t e s t s Performance test procedure For test point (TP) references, see section 6.0 Test Points. Action Test Equipment Details 5.2.1. Switch off AC power button 5.2.2. Connect Audio Analyser Output frequency:...
  • Page 13 5.0 p e r fo r m a n c e t e s t s Performance test procedure For test point (TP) references, see section 6.0 Test Points. Action Test Equipment Details 5.2.10. Set up Audio Analyser Adjust VOLUME knob until voltage on amplifier for output: 1kHz, output of amplifier is...
  • Page 14 5.0 p e r fo r m a n c e t e s t s Performance test procedure For test point (TP) references, see section 6.0 Test Points. Action Test Equipment Details 5.2.15. Right channel Audio Analyser Turn VOLUME knob to minimum. check output voltage: 100 Leave probe on cathode of D943 (TP11).
  • Page 15 5.0 p e r fo r m a n c e t e s t s Performance test procedure For test point (TP) references, see section 6.0 Test Points. Action Test Equipment Details 5.2.19. Right channel Multimeter set to Connect positive probe to 0 V check mute diode test Connect negative probe to input socket...

  • Page 16: Test Points

    6.0 t e s t p o i n t s Functional and performance test points TP 22 TP 21 TP 11 TP 13 TP 12 TP 2- TP 3+ TP 4+ TP 2+ TP 3- TP 15 TP 4- TP 1+ TP 10 TP 1-...

  • Page 17: Circuit Schematics

    7.0 c i r c u i t s c h e m a t i c s 7.1.1 Master schematic diagram (SCH267M-01-05) TP 21 TP 22 SCH26701-03-01 PAGE 25 SCH26701-04-04 PAGE 26 SCH26701-05-01 SCH26701-02-01 PAGE 27 PAGE 24 SCH26702-01-01 PAGE 28 SCH26701-07-02 SCH26701-09-02...

  • Page 18: Line Amplifier Left Channel Schematic (Sch26701-07-02)

    7.0 c i r c u i t s c h e m a t i c s 7.2.1 Line amplifier left channel schematic (SCH26701-07-02) 30.0V 28.8V 28.8V 29.0V 28.8V 28.8V 28.2V 28.2V 0.0V 14.6V 14.4V 14.0V TP 12 1.0V 0.4V 0.4V 4.7V...

  • Page 19: Line Amplifier Right Channel Schematic (Sch26701-08-02)

    7.0 c i r c u i t s c h e m a t i c s 7.3.1 Line amplifier right channel schematic (SCH26701-08-02) 30.0V 28.8V 28.8V 29.0V 28.8V 28.8V 28.2V 28.2V 0.0V 14.6V 14.4V 14.0V TP 13 1.0V 4.7V 0.4V 0.4V...

  • Page 20: Power Amplifier Left Channel Schematic (Sch26701-09-02)

    7.0 c i r c u i t s c h e m a t i c s 7.4.1 Power amplifier left channel schematic (SCH26701-09-02) TP 5+ 44.0V TP 5- 43.0V TP 1+ 42.4V 12.0V 41.8V 12.0V 11.5V 11.5V 11.1V TP 1- 10.9V 10.9V...

  • Page 21: Power Amplifier Right Channel Schematic (Sch26701-10-02)

    7.0 c i r c u i t s c h e m a t i c s 7.5.1 Power amplifier right channel schematic (SCH26701-10-02) TP 7+ 44.0V TP 7- 43.0V TP 3+ 42.4V 12.0V 41.8V 11.5V 11.5V 11.1V TP 3- 10.9V 10.9V 10.3V...

  • Page 22: Power Supplies Schematic (Sch26701-01-02)

    7.0 c i r c u i t s c h e m a t i c s 7.6.1 Power supplies schematic (SCH26701-01-02) 44.0V TP 18 30.0V TP 17 30.0V 28.8V TP 15 6.8V 10.0V TP 0 6.2V 6.2V TP 16 5.0V 0.0V TP 19...

  • Page 23: Protect And Turn On Schematic (Sch26701-06-02)

    7.0 c i r c u i t s c h e m a t i c s 7.7.1 Protect and turn on schematic (SCH26701-06-02) 44.0V 44.0V 0.0V TP 11 0.0V 44.0V 0.0V TP 23 44.0V 44.0V -44.0V -44.0V -44.0V -18.0V 28.1V 0.0V...

  • Page 24: Digital System Controller Schematic (Sch26701-02-01)

    7.0 c i r c u i t s c h e m a t i c s Digital system controller schematic (SCH26701-02-01)

  • Page 25: Digital System Interface Schematic (Sch26701-03-01)

    7.0 c i r c u i t s c h e m a t i c s Digital system interface schematic (SCH26701-03-01)

  • Page 26: Input Interface Schematic (Sch26701-04-04)

    7.0 c i r c u i t s c h e m a t i c s 7.10.1 Input interface schematic (SCH26701-04-04) BZV86-2V0 26.1...

  • Page 27: Relay Coils Schematic (Sch26701-05-01)

    7.0 c i r c u i t s c h e m a t i c s 7.11 Relay coils schematic (SCH26701-05-01)

  • Page 28: Front Panel Schematic (Sch26702-01-01)

    7.0 c i r c u i t s c h e m a t i c s 7.12 Front panel schematic (SCH26702-01-01)

  • Page 29: Speaker Outputs Schematic (Sch26703-01-01)

    7.0 c i r c u i t s c h e m a t i c s 7.13 Speaker outputs schematic (SCH26703-01-01)

  • Page 30: Printed Circuit Board Layout

    8.0 p r i n t e d c i r c u i t b o a r d l a y o u t Printed circuit board layout (top view) power amplifier power amplifier digital system left channel right channel interface digital...

  • Page 31: Printed Circuit Board Layout (Bottom View)

    8.0 p r i n t e d c i r c u i t b o a r d l a y o u t Printed circuit board layout (bottom view) power amplifier power amplifier digital system right channel left channel interface power...

  • Page 32: Technical Data

    9.0 t e c h n i c a l d a t a 9.1 8000S Technical specifications 60 W per channel into rated load impedance (8 Ω) rated output power 95 W into 4 Ω and 130 W into 2 Ω for short periods (both channels driven) 72 W per channel into rated load impedance (8 Ω)
  • Page 33 9.0 t e c h n i c a l d a t a 9.1 8000S Technical specifications ± 0.5 dB frequency response (20 Hz – 20 kHz) less than 0.07% total harmonic distortion + noise greater than 60 dB at 1 kHz...

  • Page 34: International Standards

    9.0 t e c h n i c a l d a t a International standards The 8000S meets or exceeds all the legal requirements listed below: 89/336/EEC EMC Directive (as amended by 93/23/EEC) directives * 73/23/EEC Low Voltage Directive (as amended by 93/23/EEC)

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