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2.4. USB-B / XS1U8A128FB217C10
Note : The following checks can be performed when the MAIN PCB is removed.
(There is no need to use a wire extension jig.)
Check Soldering or replace device.
DIGITAL PCB
[IC11] 73pin, [R170], [Q205], [Q201]
Check Soldering or replace device.
DIGITAL PCB
[JK15] 2, 3pin
Check Soldering or replace device.
DIGITAL PCB
[IC25] A7pin ➡ [R464] ➡ [IC29] 13pin
[IC25] A19pin ➡ [R459] ➡ [IC29] 6pin
[IC25] A9pin ➡ [R462] ➡ [IC29] 3pin
[IC29] 1pin : Hi
[IC25] A9pin ➡ [R462] ➡ [IC29] 14pin
[IC25] A7pin ➡ [R464] ➡ [IC29] 5pin
[IC25] A18pin ➡ [R460] ➡ [IC29] 2pin
[IC29] 1pin : Lo
Check Soldering or replace device.
DIGITAL PCB
[R498] ➡ [IC34] 13pin
[R475] ➡ [IC34] 6pin
[R499] ➡ [IC34] 3pin
[IC34] 1pin : High
N.G.
N.G.
N.G.
N.G.
Check Reset signal for XS1U8A128FB217C10[IC25].
DIGITAL PCB
[IC25] J2pin : Hi (Lo = Reset)
Check the Audio Data input of USB-B (PC/Mac).
DIGITAL PCB
[JK15] 2, 3pin
Check the Audio Data output of XS1U8A128FB217C10. (1)
[IC25] ➡ [IC29]
DIGITAL PCB
*When DSD Audio Data is input
[IC29] 12pin : DSD_L (USBB_LRCK)*
[IC29] 7pin : DSD_R (USBB_DATA)*
[IC29] 4pin : DSD_BCK (USBB_BCK)*
*When data other than DSD Audio Data is input
[IC29] 12pin : I2S_WFCK (USBB_LRCK)*
[IC29] 7pin : I2S_SDATA (USBB_DATA)*
[IC29] 4pin : I2S_BCK (USBB_BCK)*
* (Signal Name on Circuit Diagram))
Check the Audio Data output of XS1U8A128FB217C10. (2) ➡
[IC34]
DIGITAL PCB
[IC34] 12pin : DSD_R or I2S_SDATA (DAC_DATA)*
[IC34] 7pin : DSD_L or I2S_WFCK (DAC_LRCK)*
[IC34] 4pin : DSD_BCK or I2S_BCK (DAC_SCLK)*
* (Signal Name on Circuit Diagram)
O.K.
O.K.
O.K.
O.K.
Check Soldering or replace device.
DIGITAL PCB
➡
MAIN (DAC) PCB
[R365] ➡ [R347] ➡ [IC44] 2pin ➡ [IC44] 7pin ➡ [WF41] 6pin
➡
[WF51] 6pin
➡
[R451]
[R366] ➡ [R346] ➡ [IC44] 3pin ➡ [IC44] 6pin ➡ [WF41] 5pin
➡
[WF51] 5pin
➡
[R452]
[R367] ➡ [R370] ➡ [IC45] 2pin ➡ [IC45] 7pin ➡ [WF41] 4pin
➡
[WF51] 4pin
➡
[R453]
N.G.
Check the Audio Data output of XS1U8A128FB217C10. (3) ➡
[IC52] (DAC)
MAIN (DAC) PCB
[IC52] 25pin : DATA
[IC52] 26pin : LRCK
[IC52] 27pin : SCLK
O.K.
Check Soldering or replace device.
MAIN (DAC) PCB
➡
MAIN PCB
[IC52] 14pin : Lch (-) ➡ Lch I/V conversion circuit
[IC52] 13pin : Lch (+) ➡ Lch I/V conversion circuit
➡ [L503] ➡ [BN66] 9pin
➡
[CN66] 9pin
[IC52] 10pin : Rch (-) ➡ Lch I/V conversion circuit
[IC52] 9pin : Rch (+) ➡ Lch I/V conversion circuit
➡ [L504] ➡ [BN66] 7pin
➡
[CN66] 7pin
N.G.
Check the Audio Signal of DAC Out ➡ ANALOG / DIGITAL
Selecto.
MAIN PCB
[RL62] 3pin (Lch)
[RL62] 6pin(Rch)
TO 2.1.COMMON
O.K.
42
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