ZXSpectrum128 plus 3 circuit service manual


Posted on Feb 5, 2014

To invoke the Spectrum +3 diagnostic routines, first reset the machine while holding the BREAK key down. This will go into the test card dispray. Now hold down the QAZMLP keys for a few seconds unti the diagnostic title is displayed. Now follow the on screen prompts. This chart is for information only and does not guarantee an exact diagnosis. For


ZXSpectrum128 plus 3 circuit service manual
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warranty purposes and faulty drive mechanism must be returned to Amstrad for replacement. Service agents should not attempt any repairs on the mechanism or to it`s PCB part number 270312 Index period-N- Motor rotation 200+/- 5 msec | Y | Self-read error -N- Read Error | Y | Write error -N- Write Error | Y | Interchangeable-N- Interchangeability Error lead | Y | Disk Drive OK Motor Rotation | | Does motor-N-Power Supplied Rotate | | | | | | Y N Y<-<-| | | | | Check Wiring | | | Adjustable with-N-Does it rotate VR201 normally by using- | normal motor | Y | N | Y | Adjust Time to 200 | Replace drive +/- 1 ms Replace motor Read Error | | Test with disk EME - CF2 | | TR39 2F output-N-Head touch OK -N-Replace drive >= 140 mV | | | | Y Y | | | | Is head output-N-Replace head assembly Is TROO output-N 1 mV or more =< 220 mV | | | | | Y | Y | | | Read/write error | | in all tracks ->-+-Y->-Replace Drive | N | Read error only-N-Seek Error-N-Replace drive in Specific track | | | Y Y | | Replace disk | (inspect by drive) TROO output normal-N-Replace TROO | sensor | Y | | Replace drive Write Error | | Error Continous -N-Check action in-OK-Check action in | seek failure flow | read failure flow-+ | | | | Y | Amplifier System | | | | Head system | | | | Write waveform-OK->-+ | | in TP1. 2 | Replace drive | | | | NG | | | | | Head Connector-open-Repair head connector | open or short | | | |short | +-+ | | Replace control PCB...




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