Yamaha PSR-E473 Service Manual page 10

PSR-E473
4. PNL-B, PNR-B, AMPN, KNOB, JACK and ENC Circuit Board
1. Remove the lower case assembly. (See procedure 1)
PNL-B Crcuit Board (Time required: About 6 minutes)
l
1. Remove the 11 screws [380B]. The PNL-B circuit board can then be removed. (Fig.2)
PNR-B Crcuit Board (Time required: About 6 minutes)
l
1. Remove the 10 screws [380C]. The PNR-B circuit board can then be removed. (Fig.2)
AMPN Crcuit Board (Time required: About 7 minutes)
l
1. Remove the 14 screws [380D]. The AMPN circuit board can then be removed. (Fig.2)
KNOB Crcuit Board (Time required: About 5 minutes)
l
1. Remove the 2 control knobs from the control panel surface. (Fig.1)
2. Remove the 4 screws [380E]. The KNOB circuit board can then be removed. (Fig.2)
JACK Crcuit Board (Time required: About 6 minutes)
l
1. Remove the 6 screws [380F]. The JACK circuit board can then be removed. (Fig.2)
ENC Crcuit Board
l
1. Remove the encoder knob from the control panel surface. (Fig.1 and Fig.4)
2. Remove the 3 screws [380G]. The ENC circuit board can then be removed. (Fig.2)
10
ENCODER KNOB
Fig.4