Sony PCS-1500 Service Manual page 161

AD-1
IC520 [3] = 8 kHz?
YES
Replace IC520
AD-3
IC570 [134] = 16 kHz?
YES
IC570 and its peripheral
n
When sound is not output although this check is OK, the audio serial bus controller (IC501), the PLL
(IC500) of the audio block and its peripheral may have a trouble.
PCS-1500/1500P
NO
IC501 and its peripheral
NO
IC501 and its peripheral
AD-2
NO
IC530 [3] = 8 kHz?
YES
Replace IC530
AD-4
NO
IC540 [134] = 16 kHz?
YES
IC540 and its peripheral
4-2. Self-diagnostics Function
IC501 and its peripheral
IC501 and its peripheral
4-31