Yamaha PSR-E473 Service Manual page 11

5. MVR Crcuit Board, PB Crcuit Board, Wheel Assembly
1. Remove the lower case assembly. (See procedure 1)
MVR Crcuit Board (Time required: About 3 minutes)
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1. Remove the volume knob from the control panel surface. (Fig.1 and Fig.5)
2. Remove the 5 screws [380H]. The MVR circuit board can then be removed. (Fig.2)
PB Crcuit Board, Wheel assembly (Time required: About 5 minutes)
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1. Remove the 2 screws [380I]. The PB circuit board can then be removed. (Fig.2)
2. Pull out and remove the wheel assembly from the PB circuit board. (Fig.6)
6. PNR-T Crcuit Board (Time required: About 6 minutes)
1. Remove the lower case assembly. (See procedure 1)
2. Remove the JACK circuit board. (See procedure 4)
3. Remove the 11 screws [380J]. The PNR-T circuit board can then be removed. (Fig.7)
Bottom view
VOLUME KNOB
Fig.5
PB
WHEEL ASSEMBLY
Fig.6
Fig.7
PNR-T
[380J]
PSR-E473
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