FAQ
TL;DR: On these Onkyo AVRs, "you have in most cases 2 options" when DSP shows as ???????—either bad NAND firmware or bad soldering; verify 1.2 V and 3.3 V rails. That statistic: 2 primary root causes. [Elektroda, Elektromonterek, post #21707655]
Why it matters: This FAQ helps DIY repairers decide when to reflash NAND, rework the DSP, or chase the HDMI/CPU path on TX‑NR5009/5007/3007 class units.
Quick-Facts
- TX‑NR5009 and TX‑NR5007 NAND/BIN dumps are not interchangeable; they are “completely different dumps.” [Elektroda, fachura, post #21532661]
- DSP1 reading “????????” in service menu points to either corrupted NAND or poor DSP soldering; check 1.2 V and 3.3 V. [Elektroda, Elektromonterek, post #21707655]
- A known DSP replacement “bug” does not require programming; first check power rails and perform a reset. [Elektroda, Jarek Pi., post #21529580]
- Service menu: press Display + Standby, then use the <|> key to view each DSP version. [Elektroda, Miguel_Perez, post #21707705]
- An in-place firmware update may refuse to start if the unit already reports the latest software. [Elektroda, Miguel_Perez, post #21708913]
Quick Facts
- TX‑NR5009 and TX‑NR5007 NAND/BIN dumps are not interchangeable; they are “completely different dumps.” [Elektroda, fachura, post #21532661]
- DSP1 reading “????????” in service menu points to either corrupted NAND or poor DSP soldering; check 1.2 V and 3.3 V. [Elektroda, Elektromonterek, post #21707655]
- A known DSP replacement “bug” does not require programming; first check power rails and perform a reset. [Elektroda, Jarek Pi., post #21529580]
- Service menu: press Display + Standby, then use the <|> key to view each DSP version. [Elektroda, Miguel_Perez, post #21707705]
- An in-place firmware update may refuse to start if the unit already reports the latest software. [Elektroda, Miguel_Perez, post #21708913]
Are TX‑NR5009 and TX‑NR5007 DSP/NAND dumps interchangeable?
No. Contributors state the TX‑NR5009 and TX‑NR5007 require different dumps, so do not cross‑flash between them. [Elektroda, fachura, post #21532661]
Do I need to program the DSP after replacing it on a TX‑NR5009/5007?
One expert notes the replacement is a known bug that doesn’t require programming. Check power to the circuits and perform a reset first. [Elektroda, Jarek Pi., post #21529580]
What does “DSP1: ????????“ in the service menu actually mean?
It indicates the DSP firmware is not loading. You likely face either corrupted NAND content or poor DSP soldering. Verify 1.2 V and 3.3 V rails. [Elektroda, Elektromonterek, post #21707655]
How do I check DSP firmware versions in the service menu?
Press Display + Standby to enter the menu. Use the <|> button near Display to cycle items and read each DSP version field. [Elektroda, Miguel_Perez, post #21707705]
Firmware update won’t start—why?
If the receiver already reports the latest software, the updater will not initiate. Consider offline NAND reflash if faults persist. [Elektroda, Miguel_Perez, post #21708913]
After a DSP swap I see speaker icons but still no sound—what should I try?
Run a full firmware update attempt and confirm rails first. As one expert put it: “Try whole firmware update.” [Elektroda, Elektromonterek, post #21708212]
Could the HDMI board be the real cause after years of use?
Yes. A contributor concluded the case described points to the HDMI board aging over time as the underlying issue. [Elektroda, Jarek Pi., post #21711539]
How do I choose between reflashing NAND and reworking the DSP soldering?
If DSP1 shows ???????, you have two paths: 1) reflash NAND externally, or 2) fix soldering, after confirming 1.2 V/3.3 V rails. [Elektroda, Elektromonterek, post #21707655]
Can I drop a D830K013DZKB4 DSP from a TX‑NR646 into a TX‑NR3007 and expect audio?
A user did this and still had no sound. An expert advised the issue lies in control—either DSP or CPU—beyond just the chip swap. [Elektroda, Jarek Pi., post #21707444]
Does long ownership correlate with failure symptoms?
One owner reported 4–5 years between purchase and renewed audio failure. This timeline suggests age‑related board issues can surface. [Elektroda, Miguel_Perez, post #21708913]
If I replaced the HDMI board with a different model, can that complicate repairs?
Yes. A prior HDMI board swap from a “different model” preceded persistent no‑audio behavior, making diagnosis and parts matching harder. [Elektroda, Miguel_Perez, post #21708913]
Should I plan to dump and reflash the NAND/flash when DSP reads ???????
Yes. The guidance is to externally reflash NAND when firmware doesn’t load, before chasing deeper hardware faults. [Elektroda, Elektromonterek, post #21707655]
What voltages must be present at the DSP for reliable boot?
Confirm stable 1.2 V and 3.3 V supplies at the DSP. Missing rails point to power or solder issues rather than firmware alone. [Elektroda, Elektromonterek, post #21707655]
How can I collect boot logs for deeper diagnosis?
Attach a UART‑to‑USB adapter to the system console. Reading logs verifies whether the system boots and where it fails. [Elektroda, Miguel_Perez, post #21708913]
I replaced the DSP and still nothing—what first‑aid steps should I take?
Check power rails, perform a reset, and inspect solder joints. Only then consider NAND reflash or HDMI/CPU control faults. [Elektroda, Jarek Pi., post #21529580]
Quick how‑to: check DSP versions and interpret results
- Press Display + Standby to enter service mode.
- Use the <|> key near Display to cycle to DSP1 and others.
- If you see ??????? for DSP1, plan NAND reflash or solder rework next.
[Elektroda, Miguel_Perez, post #21707705]