Sony UP-21MD Service Manual page 8

4. Circuit Operation Description
(Part of VPR-74 Board)
Oreo renennoreneenaveersese senses eee esessseneseeseerenesees
dev ereeereevencccccveescneeses
4-4-2. Address Map ......ssscssscssssssssssssessessssssssesstsseeseonee
4-4-3, Circuit Operation ..........sccsccssesssssssssessseessssenees '
4-4-7. | Media Protection such for Software
5. Troubleshooting
Mechanical Trouble NG Code List
UP-21MD V1