Fault Diagnostics
Fault | Action |
No power | Check fuses |
| Check power supply rails |
Unit functions ok but no audio | Check preamp fuses |
| Check RL100A (volume control mute relay) |
| Check +5V supply rail |
| Check mute signal line |
Volume control locks up | Check software version is 2.0 or higher |
DC offset | Check equipment connected to amp for DC on the audio leads |
| Check alterations as per ECO 01_1101 have been fitted |
Unit fails to respond to commands | Check ribbon cable from display to main board |
| Check ribbon cable from display to preamp board |
Unit gets very hot | Check power stage IQ settings |
Hints & Tips
!To check software version press PHONO, TUNER, DVD buttons on the front panel simultaneously.
!On issue 2 phono boards only, fit Kapton insulation tape to the phono stage PCB (rear panel end) to prevent track shorting to chassis.
!Check all fuses are the correct rating.
!Check DC offset alterations are fitted as per ECO 01_1101
!To isolate a fault between the pre or power amp section press the PRE/PWR button on the rear panel to separate the two sections.
!Check R100 on amp/psu board is not shorting to the track underneath (through plated via).
