yamaha编程（雅马哈编程）.doc

yamaha编程（雅马哈编程）
Chapter 1 understanding and introduction of parts
The common SMD part packing method is CHIP/MELF/TR/S. capacitor in the PC board referred to as [C], its appearance is not digital to distinguish, usually the lighter the color, the smaller the value of capacitance
The error values for al. C are Z, Type=+80%, and -20% (commonly used in 104Z)
M, Type=+10%, -10%
K, Type=+20%, -20% (commonly used 103K)
J Type=+/-5%
F Type=+/_1%
Its capacitance value is converted
IP
10P
100P=101P=0. OOOluf
1000P=102P=0. 001uf=ln
10000P=103P=0. 01uf=10n
The 100000P=104P=0. luf=100n *104P is used beside the IC of the motherboard, the SOP of the lOpin-20pin
1000000P=105P=luf * factory's wording and statement 104P
10000000P=10uf (used in motherboard 5V to filter current noise)
The capacitor has positive and negative polarity, and Mark is the positive pole (the right side of the belt forward)
SMD capacitor has different materials because of its characteristics and pressure resistance
The capacitor material is divided into ceramic / tantalum / electrolytic
In the main computer board, in the 286 era, DIP+PLCC parts mainly, the PLCC is not directly welded on the PC board, will be installed in a parts seat (SOCKET), but also can not see 1206 of traces
Diode [C] / / inductor / transistor oscillator [QUARTZ]
Diodes [D]
Diodes have IN4148/ZD, 5. 6V (zener diode) and rectifier diodes, IN4001/IN4002 and light-emitting diodes, commonly known as LED.
IN4148 is used downstream of the motherboard (SIZE, phi,
4mm*3. 4mm)
The ZD5. 6V is used in the Power part of the main current limiting voltage (SIZE, phi, 1. 4mm*3. 4mm)
The IN4001 is used in the Power section, mainly converting the AC voltage to DC (SIZE phi 2. 5mm*3. 4mm), which has now been replaced by a bridge rectifier
LED main display, the market has been double color, red, yellow, green and blue
The diode has positive and negative poles, and Mark is the negative (forward left)
Inductance [L]
Inductance s