Dsp Trouble Shooting - Pioneer XV-DV434 Service Manual

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7.1.10 DSP TROUBLE SHOOTING

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Detectable DSP Errors
The following conditions are assumed,
in order to eliminate causes other than "DSP-assy" and "between DSP-assy and microcomputers".
• Electric power is correctly supplied to DSP-assy.
• The SPDIF signal is coming to the input port of DIR ("COAX IN" RX0 & "OPT IN" RX3 & "DVD" RX7).
• There is no audio output from DSP-assy, or audio output is unusual.
Check the signal route by referring the connection diagram between U-com and DSP module IC (next page).
• ERR_0 : –Cannot receive data from DIR–
→Communication fault has occurred somewhere between DIR (PinNo.17 CDTO)– µ-com (PinNo.80 DIRDO).
→Communication fault has occurred somewhere between the µ- com-port (*1) which has sent the signal and each IC.
• ERR_1 : –Cannot receive data from DSP–
→Communication fault has occurred somewhere between DSP (PinNo.35 MISO)–µ-com (PinNo.24 DSPDO).
→Communication fault has occurred somewhere between the µ-com-port (*1) which has sent the signal and each IC.
→Communication fault has occurred somewhere between the DIR and DSP.
• ERR_2 : –There is no return value of HREQ.–
→Communication fault has occurred somewhere between DSP (PinNo.38 HREQ)–µ-com (PinNo.82 DSPHREQ).
→Communication fault has occurred somewhere between the µ-com-port (*1) which has sent the signal and each IC.
→Communication fault has occurred somewhere between the DIR and DSP.
• ERR_3 : –ERR information from DSP–
TE
→Communication fault has occurred somewhere between the µ-com-port (*1) which has sent the signal and each IC.
L 13942296513
(especially the fault inside DSP)
→Communication fault has occurred somewhere between the DIR and DSP.
• ERR_4 : –DECOMUTE continues being LOW(MUTE).–
→Communication fault has occurred somewhere between DSP (PinNo.54 MUTE)–µ-com (PinNo.86 DECMUTE).
→Communication fault has occurred somewhere between the µ-com-port (*1) which has sent the signal and each IC.
→Communication fault has occurred somewhere between the DIR and DSP.
Although the following are not errors, they are displayed separately and are helpful in finding a solution.
• INFO_0 : –DIRERR is HIGH (UNLOCK) in digital function.–
If DIRERR continues being HIGH (UNLOCK) without the above-mentioned error display.
→Communication fault has occurred in somewhere between DIR (PinNo.22 INT0)–µ-com (PinNo.77 DIRERR).
→Check that the external set and this model is properly connected by the digital cable when selecting LINE2 (External Digital) function.
• INFO_1 : –DSPMUTE is LOW (MUTE).–
If DSPMUTE continues being LOW (MUTE) without the above-mentioned error display.
→Communication fault has occurred somewhere between µ-com (PinNo.57 XDSPMUTE)–E-VOL (IC3062) (PinNo.35 MUTE).
• INFO_2 : –Loading 88.2kHz/96kHz PCM–
DSP function is limited when this information is displayed.
Notes :
www Only the high priority error (near to ERR_0) is displayed when the multiple errors have occurred.
When the analog audio output of a DSP module is unusual but the above error information is not displayed, the fault is probably in the
CODEC IC (IC701) and the peripheral circuits.
.
As the µ-com has not received data from the CODEC IC, it cannot detect the fault and display the error information.
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* "U", "M" display below is a sample.
Those character display ON/OFF depends on the state.
D I E R - U M
FL
D S E R - U M
FL
H R E Q - U M
FL
D S N G - U M
FL
Q Q
3 6 7 1 3 1 5
D M U T - M
FL
FL D S O K - U
D S O K -
FL
D S O K -
FL
co
.
XV-DV333
7
9 4 2 8
0 5 8 2 9 9 4 2 8
M
M
9
m
8
9 9
A
B
C
9 9
D
E
F
81
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