我還在辛苦的等t-amp寄來 XD
一些資料從diyAudio來的 提供參考
Sonic Impact 5066 Parts Description, correlating to tripath datasheet
http://www.tripath.com/downloads/TA2024.pdf
This information is based on a Sonic Impact 5066 board with the date code of 2003.07.03
Parts with a (?) next to them indicate my best guess of this part's value and/or purpose. Many of the capacitors on the bottom side of the board, toward the speaker outputs, are most likely part of the output correction stuff on the datasheet. I was also unable to locate any schottky diodes on the output, as listed in the datasheet, but this may be my inability to decipher some of the surface mount parts.
=============
Connector #1:
=============
(from Left to Right):
V + Ro Lo G Li Ri
V = switch 12volt out
+ = switch 12volt in
Ro = to volume from right channel
Lo = to volume from left channel
G = ground
Li = from volume control to amp left channel
Ri = from volume control to amp right channel
The LED is mounted to bottom. Looking down from the top, the cathode (notched side) is on the left.
==================
Connector #2 (12V)
==================
Looking at the board from the top, with the wide side closest to you, the pins are as follows (front top to bottom):
Pin 1 (Top, Center): 12V in
Pin 2 (Middle, to the right): Ground disconnect for battery source. This pin opens the grounding between the battery and the rest of the board when a plug is inserted
Pin 3 (Bottom, Center): Ground
If you decide to remove the 12V jack, and don't care about destroying it, the easiest way I've found is to do as follows:
1) Using desoldering braid or a desoldering iron, remove as much solder from each of the pins as possible.
2) Using snips, cut the tabs off the bottom of the jack
3) Reheat the solder pad on pin3 and pull the connector from the back of the board towards the front. Then proceed in order through Pin2 and Pin 1.
=======================
Connector #3 (Audio in)
=======================
Looking at the board from the top, with the wide side closest to you, the pins are as follows (left to right):
Pin 1: Right channel in
Pin 2: Ground
Pin 3: Ground
Pin 4: Left channel in
Pin 5: Ground (located in the center of the connecter, below the other 4 pins)
==========
Resistors:
==========
t = top
b = bottom
Offboard:
---------
VR1 = 50k (volume control, measured 45k5)
Onboard:
--------
Top:
R01t = 10k (103), Right channel in, connected to ground
R1t = 1k5 (152), Current limiting resistor for LED
R2t = 20k (203), Ri - Inverting Input Resistor, Left Channel
R4t = 36k (363), Rf - Feedback Resistor, Right channel
Bottom:
R02b = 10k (103), Left channel in, connected to ground
R1b = 20k (203), Ri - Inverting Input Resistor, Right Channel
R3b = 8k2 (822), Rref - Reference Resistor to pin 6
R5b = 36k (363), Rf - Feedback Resistor, Left Channel
R8b = 10 (100), Output Zobel, Right Channel
R9b = 10 (100), Output Zobel, Left Channel
===========
Capacitors:
===========
Top:
C5t = 0.1uF?, Cs - Low Voltage Bypass, connects to pin 1, 4 and 9
C7t = 0.1uF?, Cd - Charge Pump input cap, pin 2-3
C10t = 330uF/16v, Csw - Supply Decoulping for H-bridge Supply Pins
(This cap supplies Vdd1 and Vdd2, as they are connected under the chip.)
Bottom:
C9b = 1uF, Cpump - Charge Pump Capacitor
C11b = 0.1uF?, Csw - Local supply decoulping for H-bridge
C12b = 0.1uF?, Csw - Local Supply decoupling for H-bridge
C17b = 0.22uF?, CDo - output zobel, right channel
C18b = 0.22uF?, CDo - Output zobel, left channel
C21-24 = 0.47uF?, Co - Output Capacitors
=========
Grounding
=========
The large solder blobs on the board are connected to the ground plane as far as I can tell. The grounding is connected to the bottom of the chip by a large number of vias underneath. This is similar to the Powerpad(?)-style mounting of a headphone amp chip from Texas Instruments.