29
2.6. USB DAC (DIGITAL IN USB)
Check Digital Audio Data for CODEC
MAIN B'D
• [IC23] : 5pin USBDAC_SPDIF
Check USB Data for USB DAC
MAIN B'D
• [IC910] : 34,35pin D+&D-
Check Soldering.
• [JK91] : 2,3pin on MAIN B'D
• [IC910] : 34,35pin D+&D- on MAIN B'D
Check Soldering.
• [IC23] 5pin USBDAC_SPDIF on MAIN B'D
• [IC910] 27pin USBDAC_SPDIF on MAIN B'D
NG
NG
OK
OK
A
A
2.7. COMMON PART
Check Oscillation waveform.
MAIN B'D
• [IC23] : 22pin TXO
12.288MHz OK?
Check Reset signal for CODEC.
MAIN B'D
• [IC23] : 25pin 4683_RESET
"H" level O.K.?
Check controll signal for CODEC.
MAIN B'D
• [IC23] : 26,27,28pin
4683_CDTI,4683_CCLK,4683_CSN
Check Digital Out Data for OPT/COAXIAL outpit.
MAIN B'D
• [IC23] : 23pin Digital Out Data
Check Audio Serial Data for DSP.
MAIN B'D
• [IC501] : 125pin 5508_SDATA
Check Audio Serial Data for DAC.
MAIN B'D
• [CN40] : 15pin SDATA
Check Power Supply Voltages for CODEC.
MAIN B'D
• [IC23] : 1,20,33,43,50pin
VDD +5V
• [IC23] : 18pin
VDD +3.3V
O.K.?
Check Soldering.
• [IC22] : 3pin +5V on MAIN B'D
• [IC505] : 3.3V D1 on MAIN B'D
Check Soldering.
• [X201] on MAIN B'D
Check Soldering.
• [IC31] : 102pin 4683_RESET on MAIN B'D
Check Soldering.
• [IC31] : 105,106,107pin
4683_CDTI,4683_CCLK,4683_CSN
Check Soldering.
• [IC23] : 23pin Digital Out Data on MAIN B'D
• [TX21] : OPTICAL OUT on MAIN B'D
• [IC21] : COAXIAL OUT on MAIN B'D
Check Soldering.
• [IC501] : 125pin 5508_SDATA on MAIN B'D
Check Soldering.
• [CN40] 15pin SDATA on MAIN B'D
• [IC73] 3pin SDIN on MAIN B'D
• [BN42] :15pin SDATA on AUDIO B'D
NG
NG
NG
NG
NG
NG
NG
OK
OK
OK
OK
OK
OK
OK