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 ;
Great product, helped me to restore vintage walkman cassette.
Just some pictures could be little bit more sharp and contrast
Thank you
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I love older radio's and the service manuals that are sometimes hard to find. Was able to find a manual quite easily on this site.
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Thank you for your shop manual! Your help was very useful - the device is repaired! Once again - Thank you! I wish you a successful business! Edward (Russia).
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It was a great experience,instead of purchasing a new Stereo Amplifier ,in just minutes i repaired my old one and that was thaks to the manual I have purchased from you.
Thanks again.
Samuel Alter
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Das ging ja sehr unkompliziert hat bestens geklappt und die Quallität ist auch noch gut.
Vielen Dank dafür.
DV-505/DVF-4050/-S
CIRCUIT DESCRIPTION
Block Diagram for D/A Converter BCK LRCK DATA Serial Input I/F 8X Oversampling Digital Filter with Function Controller DAC Enhanced Multi-level Delta-Sigma modulator Output Amp and Low-pass Filter Vout L
ML Function MC Control MDI I/F
Vcom
DAC
Output Amp and Low-pass Filter
Vout R
System Clock System Clock Manager ZERO L Zero Detect
SCK
Power Supply
64 Bit SDRAM : HY57V651620B(IC301)
Pin No. 38 37 19 20,21 22~26 29~35 16,17,18 15,39 2,4,5,7,8,10 11,13,42,44 45,47,48,50 1,3,9,14,27 43,49 10 36,40 Pin Name CLK CKE CS BA0,BA1 A0~A11 WE,CAS,RAS LDQM,UDQM DQ0~DQ15 VCC/VCC Q VSS/VSS Q NC I/O I I/O I/O Description The system clock input. all other inputs are registered to the SDRAM on the rising edge of CLK Controls internal clock signal and when deactivated,the SDRAM will be one of the states among power down, suspend or self refresh. Enables or disables all inputs except CLK, CKE, and DQM. Selects bank to be activated during RAS activity. Selects bank to be read/written during CAS activity. Row address : RA0~RA11, Column address : CA0~CA7 Auto-precharge flag : A10 WE, CAS and RAS define the operation. Controls output buffers in read mode and masks input data in write mode.
DGND VCC VDD
ZERO R
Multiplexed data input/output pin. Power supply for internal circuits and input buffers. Ground terminal. Unused.
Flash Memory : M29F400T-90N1(IC401)
Pin No. 25,24~16,8~1 29,31,33,35 38,40,42,44 30,32,34,36 39,41,43 45 26 28 11 12 15 47 37 27,46 Pin Name A0~A18 DQ0~DQ7 DQ8~DQ14 DQ15 CE QE WE RP RY/BY BYTE VCC VSS I/O I I/O I/O I/O o Description Address Inputs Data Input/Outputs, Command Inputs Data Input/Outputs Data Input/Outputs or Address input Chip Enable Output Enable Write Enable Reset/Block Temporary Unprotect Ready/Busy/Output Byte/Word Organization Supply Voltage Ground
8
AGND
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