Roland SH201 synthesizer

Roland     SH201     synth with D Beam      s/n ZU61254     Condition: Fair/Poor

• Requires external PSU: 9vDC (centre pin negative) (Roland PSB-1U)
• Main sound patches working, some potentiometers a little noisy.  With the exceptions noted below, all controls appear to be working. Audio out and headphones working
• Osc1 wave selector switches not functioning, altho Osc1 waveform  does change with patch selection.  Osc1  variable controls working.
• Osc2 selection does not activate variable controls (or Osc2 indicators), but Osc2 is running, as evidenced by the mix function knob and ‘wide’ function.
• Have not tested the External audio-in (orange section) Audio filter selector suspected faulty.
• Apeggiator works for each bank button for patches 1-4. patches 5-8 not working