Ordering guide:
PCB empty board: PCB empty board, suitable for your own DIY;Type 1: Finished board, as shown in the figure;Type 2: Finished board, as shown in the figure, on the basis of Type 1, components with balanced interfaces are added.
Features:
1. The design comes from the TDA1541 line of the tenth anniversary of the forum;2. The latest upgrade in 2020, adding display module interface, USB, optical fiber, Bluetooth expansion interface;3. Type 1 and 2 are only semi-finished decoder boards, excluding SAA7220 and TDA1541;4. PCB size: 200×175mm;5. The PCB board uses FR-4 military grade, 4-layer circuit, board thickness 2cm, heavy gold design, 20Z copper;6. The digital part uses domestic 718 factory military resistance, 1% metal film, 50PPM;7. The power supply and the analog part of the op amp are surrounded by Taiwan's high-precision 15PPM, with an error of 0.1% metal film resistance (you are not mistaken, it is one thousandth, the error color ring is purple, and the brown one is one percent error) ;8. The film capacitors mainly use the WIMA brand, and some of them use Philips, Siemens, and ERO;9. The main electrolysis is 5600uF ultra-low internal resistance aluminum electrolysis, Panasonic FM series 220uF and Sanyo SP series 270uF are used for decoupling;10. All IC sockets use genuine Taiwan Linggong gold-plated round hole sockets;11. The op amp uses the original imported genuine TI5534+JRC5534DD (the reason for matching is explained later);12. The board has been debugged and plugged in TDA1541 to listen to music continuously for more than 2 hours. After you receive it, you only need to plug in the power supply and plug in SAA7220 and TDA1541 to use it normally. If you need to support 7220 and 1541, please contact customer service;13. Power requirements: dual AC13-15V + single AC7-9V
PCB empty board
suitable for your own DIY
【EXT INT】Extension input interfaceV: Positive power supply 5VG: negative pole of power supplyD: Coaxial inputG: negative pole of power supplyUse this interface to connect USB module, Bluetooth module, optical fiber module;When using the expansion interface input, please unplug the RCA plug, this interface occupies the RCA coaxial input;When using the expansion interface input, a C2* capacitor must be installed, and the capacity can be 0.1~1uF.