* <span style="color:#FF0000">The write protection sensing is done using a [[Writepin|switch / pin assembly]].</span>
<div style="clear: both"></div>
The Test Points under the PCB are found near the front of the drive, near the drive LED.
On the 5 pin TP connector:
* pin 1 or pin 2 for head amplifier
* pin 3 is GND
* pin 4 is the index hole detection (high on index)
* pin 5 for track0 sensor (low when on track 0)
Reference: https://www.cpcwiki.eu/forum/amstrad-cpc-hardware/eme-156-mechanics/msg172359/#msg172359
=== EME-156 V ===
On EME 150A, the drive motor speed regulation is done on the main unit PCB, and is adjusted using VR201.
On Other model (155/156/156V/157), the drive motor includes its own regulation PCB, and adjustment is done on the motor itself., which can be one of the following reference (MMA-xxxxxx, QJN2-xxxx or MMU-xxxxxx)
<gallery>
File:EME-150A_RpmAdjust.jpg|EME-150 A speed adjust
</gallery>
Rotation speed can be checked either by monitoring the drive index pulse with an oscilloscope or by using dedicated SW like [http://www.cpcwiki.eu/forum/applications/dsktest-v0-1b/ DskTest] or [http://www.amstradtoday.com/resur/rpm.zip RMPRPM]. Adjustment requires a 2mm wide screwdriver. A larger one will not fit in the potentiometer adjustment hole. On MMA-xxxxxx, the adjustment hole is covered with a white rubber and the internal PCB is facing down. <span style="color:#FF0000">That requires additional precautions : forcing the screwdriver in the hole may detach the potentiometer from the PCB and damage the motor.</span> On QJN2-xxxx and MMU-xxxxxx, the adjustment hole is covered with a black rubber and the internal PCB is facing up.
== Gallery ==
File:EME-156 Right.jpg|EME-156 Right side
File:EME-156 Left.jpg|EME-156 Left side
File:EME-156 Bottom.jpg|EME-156 BottomME56PB31 PCBFile:EME-156 Bottom ME56PB41.png|EME-156 Bottom ME56PB41 PCB
</gallery>