I have two Magnavox CDB560 (Philips CD560) decks that I am recapping. My first foray into such a project, and I am a newbie on the Forum.
These decks are one step below the CD650 in this product line's lineup. I've compared the schematics for the 560 and the 650 and the main boards are almost identical for electrolytic capacitor values and locations, except for about 3 locations. The other big difference is the CD560 has LM833 Op Amps while the CD650 has NE5232N Op Amps.
Two capacitors mounted on the boards do not agree with the schematic. The Philips CD560 service manual schematic has Caps 2305 and 2309 as 1uF and 2.2uF respectively (Decoding 1 diagram). However, these are reversed on both 560 boards, i.e., 2305 is the 2.2uF and 2309 is the 1uF. I checked the service manual for the 650, and that schematic agrees with the 560 service manual schematic. One 560 deck was manufactured in January 1987, and the other in June 1987, so it seems that Philips kept building them with the capacitors reversed vs. the published schematics.
I have no idea which is correct, the actual manufactured boards or the schematics. So I have two questions I hope someone knows and would be kind enough to answer. Which is correct, as manufactured or as published? And does it make any difference if they are reversed?
These decks are one step below the CD650 in this product line's lineup. I've compared the schematics for the 560 and the 650 and the main boards are almost identical for electrolytic capacitor values and locations, except for about 3 locations. The other big difference is the CD560 has LM833 Op Amps while the CD650 has NE5232N Op Amps.
Two capacitors mounted on the boards do not agree with the schematic. The Philips CD560 service manual schematic has Caps 2305 and 2309 as 1uF and 2.2uF respectively (Decoding 1 diagram). However, these are reversed on both 560 boards, i.e., 2305 is the 2.2uF and 2309 is the 1uF. I checked the service manual for the 650, and that schematic agrees with the 560 service manual schematic. One 560 deck was manufactured in January 1987, and the other in June 1987, so it seems that Philips kept building them with the capacitors reversed vs. the published schematics.
I have no idea which is correct, the actual manufactured boards or the schematics. So I have two questions I hope someone knows and would be kind enough to answer. Which is correct, as manufactured or as published? And does it make any difference if they are reversed?
Welcome to the forum!
The CDB560 is said to sound "terrific" so I would favour sticking to the arrangement on the manufactured board.
Since you have two CDB560 players, you could possibly do an A/B comparison of both iterations.
The CDB560 is said to sound "terrific" so I would favour sticking to the arrangement on the manufactured board.
Since you have two CDB560 players, you could possibly do an A/B comparison of both iterations.
