very helpfull
circuit diagram and sparepart list available
Text excerpt from page 16 (click to view)
MX-KA3
Removing the cassette deck heads (See Fig. 19 and 27)
Prior to performing the following procedures, remove the top cover and both sides board. Also remove the CD changer unit. Also remove the front panel assembly. 1. Remove six screws Z that retain the cassette deck mechanism. (Fig.19) 2. Remove the cassette deck mechanism and place it so that the front side faces up. 3. Remove the solder from the bottom side of the head terminal and disconnect the wire. 4. Remove screw U that retains the head. 5. Remove screw V that retains the head. 6. Hold the head and slide it in the direction of the arrow to remove it.
Cassette deck mechanism (Front side)
PB Head
V
U
V
U
REC/PB Head
Fig.27
Removing the 3-pin regulator and bridge diode (See Q904, Q907, D901, D914 and Fig.28)
Prior to performing the following procedures, remove the top cover and both sides board. 1. Remove two screws A that connect the heat sink. 2. Remove two screws W that connect the heat sink. 3. Remove the solder fixing the the 3-pin terminal regulator Q904, Q907. 4. Remove the solder fixing the 4-pin bridge diode (D901, D914).
