Today the garbage store received a Shanshui UX800 amplifier, I used to know that this machine just came out to thousands of silver, now when the garbage is recovered only two or three hundred yuan, the machine retracts the power on the machine will start the protection can not work normally, after checking is the capacitor inside after the replacement of everything works normally, the maintenance process is saved, only introduce the components used in the machine.
This UX-800 amplifier comes with advanced audio amplification technology and decoding format, using the high-performance chip CS42518+CS49326 of CRYSTAL company of the United States; It greatly reduces the radiation and interference during transmission, and CS42518 has a very significant improvement over the original decoding scheme in terms of signal-to-noise ratio, A/D, D/A accuracy, and the highest system sampling frequency.
In addition to the highlights of the chip, the R-DRIVER touch virtual button set on the UX-800 has changed the traditional power amplifier to rely on various buttons to complete the operation habit, a ring of touch, interlocking, interconnected, icon prompt, Chinese display, without any learning, easy touch can complete all operations.
Fix the working machine
Take apart the amplifier casing and look at it
Remove the inside of the number board
Main filter capacitor
Output inductor
Power amplifier tube (Toshiba C5198+A1941) six-power amplifier design
Toroidal transformers
Simulate the Panshan LOGO
A line of slogans on the radiator, and a line below: Hi -quality originated from Tokyo
Two broken capacitors
4 large capacitors, 3 pregnant, one of which also exploded
Digital decoder board section
CS42518, 110 dB, 192 kHz 8-Ch Codec with S/PDIF Receiver (110dB signal-to-noise ratio, 192kHz 8-channel Codec + S/PDIF receiver) with eight 24-bit DACs and two 24-bit ADCs with digital filters and volume adjustment
The DSP chip CS493263 supports Dolby Digital and DTS / DTS-ES decoding (in fact, signal processing), responsible for multi-channel decoding and sound effect processing
Flash chip KH’s 4M flash
Thai’s 32-bit ARM master, OKI ML674000
The digital version of the in-line component surface, the interface &LOGO of the digital board, and the interface are fixed with red glue
The buzzer rings when operating
HD74HC04P Six inverter
Atmel 24C02B 2K serial EEPROM for storing user settings
There are two 74HC165N registers on the left and the CD4053BE electronic switch on the right
On the other side, a CD4053, a 74HC165N, and a CD4096BE, again registers
The input sections CD4053 and CD4051 are electronic switches
Output section, a row of RC4580 dual op amps
RC4558 op amp, responsible for microphone preamplification
M65831AP, Renesas reverb processing chip
LC75342, volume adjustment chip
Op Amp(4558)
LM324N, quad op amp
JRC 4558 op amp
Or 4558 op amp
Two pieces of the main control board
7805 regulator
7812, the middle two are 7812 and 7805
The newly replaced capacitor, this row of electricity is easy to break is a design defect, too close to the radiator, low-voltage power supply lC radiator heat is extremely baked filter capacitor
After all, it is an old machine, and the main filter capacitor is also replaced
Transformer power supply winding marking
Machine function operation panel, yellow circle for the main volume touch virtual button
display screen
summary
The color of this amplifier is not bad, and the normal use of each function is indeed a rare leak detection.