Audio Fix / setup help
Hisense AX5125H: make one guarded AV SYNC increment on an early digital-audio path
Audio before picture on the identified current digital mode; actual LT delay screen and timeout must remain visible during adjustment.
Manufacturer-documented Reviewed 2026-11-09 · Revision 1
Follow these checks in Audio Fix →When this guide applies
Audio before picture on the identified current digital mode; actual LT delay screen and timeout must remain visible during adjustment.
Connection scope: HDMI / ARC / eARC audio · Optical digital audio. Symptom: Sound and picture are out of sync.
This is a documented check, not a diagnosis of your equipment. The model name does not confirm the selected input, mode, software or connected partner.
If your exact model or a required setting is unknown, use the “I don’t know” branch below. Do not apply a similarly named model’s instructions.
Checks and possible outcomes
Start at step-0. Follow the link that matches what you actually observe. Alternative branches are not a single sequence of actions.
step-0
Does audio arrive before the matching video on this identified HDMI or optical input?
Extra delay can worsen already-late audio; Bluetooth/AUX are not supported by this adjustment.
Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.
- If Yes, confirmed → May one reversible 10 ms trial retain the actual old value for this same mode?
- If No → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented Hisense AX5125H official manual ↗PDF pages 1, 8, 14 — Play/Pause held three seconds opens MENU; nine Next presses reach LT audio delay. VOL adjusts in 10 ms increments up to 200 ms. Delay is mode-specific and digital-only; Play/Pause or ten seconds exits.Actual UK product 20014260 Instructions for use links this exact21-page English manual. No Bluetooth/AUX correction and no master-volume action after the LT screen has timed out. · Source checked 2026-11-09
step-1
May one reversible 10 ms trial retain the actual old value for this same mode?
Read the complete sequence before beginning. The menu exits after ten seconds; never press VOL if LT is no longer displayed.
Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.
- If Yes, confirmed → Hold Play/Pause on the supplied remote for three seconds to open MENU
- If No → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented Hisense AX5125H official manual ↗PDF pages 1, 8, 14 — Play/Pause held three seconds opens MENU; nine Next presses reach LT audio delay. VOL adjusts in 10 ms increments up to 200 ms. Delay is mode-specific and digital-only; Play/Pause or ten seconds exits.Actual UK product 20014260 Instructions for use links this exact21-page English manual. No Bluetooth/AUX correction and no master-volume action after the LT screen has timed out. · Source checked 2026-11-09
step-2
Hold Play/Pause on the supplied remote for three seconds to open MENU
Do not hold Bluetooth, SOURCE or PAIR.
Look for: Perform only the stated operation, then confirm it was possible.
- If I completed this → Press Next nine times to reach the actual LT delay screen and retain its displayed old value
- If I could not do this → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented Hisense AX5125H official manual ↗PDF pages 1, 8, 14 — Play/Pause held three seconds opens MENU; nine Next presses reach LT audio delay. VOL adjusts in 10 ms increments up to 200 ms. Delay is mode-specific and digital-only; Play/Pause or ten seconds exits.Actual UK product 20014260 Instructions for use links this exact21-page English manual. No Bluetooth/AUX correction and no master-volume action after the LT screen has timed out. · Source checked 2026-11-09
step-3
Press Next nine times to reach the actual LT delay screen and retain its displayed old value
If the actual display differs, stop before a VOL operation; no hidden DTS compliance control is used.
Look for: Perform only the stated operation, then confirm it was possible.
- If I completed this → Only while LT is still visibly active, press VOL+ once for one 10 ms delay increment within 0–200 ms
- If I could not do this → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented Hisense AX5125H official manual ↗PDF pages 1, 8, 14 — Play/Pause held three seconds opens MENU; nine Next presses reach LT audio delay. VOL adjusts in 10 ms increments up to 200 ms. Delay is mode-specific and digital-only; Play/Pause or ten seconds exits.Actual UK product 20014260 Instructions for use links this exact21-page English manual. No Bluetooth/AUX correction and no master-volume action after the LT screen has timed out. · Source checked 2026-11-09
step-4
Only while LT is still visibly active, press VOL+ once for one 10 ms delay increment within 0–200 ms
If the screen has timed out, do not press VOL: that would operate main volume instead. Choose could not follow/Unknown and stop.
Look for: Perform only the stated operation, then confirm it was possible.
- If I completed this → Press Play/Pause to leave the confirmed delay menu
- If I could not do this → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented Hisense AX5125H official manual ↗PDF pages 1, 8, 14 — Play/Pause held three seconds opens MENU; nine Next presses reach LT audio delay. VOL adjusts in 10 ms increments up to 200 ms. Delay is mode-specific and digital-only; Play/Pause or ten seconds exits.Actual UK product 20014260 Instructions for use links this exact21-page English manual. No Bluetooth/AUX correction and no master-volume action after the LT screen has timed out. · Source checked 2026-11-09
step-5
Press Play/Pause to leave the confirmed delay menu
No source, master-volume or television setting is changed by this instruction.
Look for: Perform only the stated operation, then confirm it was possible.
- If I completed this → Is the same scene now closer to synchronisation?
- If I could not do this → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented Hisense AX5125H official manual ↗PDF pages 1, 8, 14 — Play/Pause held three seconds opens MENU; nine Next presses reach LT audio delay. VOL adjusts in 10 ms increments up to 200 ms. Delay is mode-specific and digital-only; Play/Pause or ten seconds exits.Actual UK product 20014260 Instructions for use links this exact21-page English manual. No Bluetooth/AUX correction and no master-volume action after the LT screen has timed out. · Source checked 2026-11-09
step-6
Is the same scene now closer to synchronisation?
Retain the original value for reversal if worse; no timing measurement is claimed.
Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.
- If Yes, confirmed → Checks completed — report the actual result
- If No → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented Hisense AX5125H official manual ↗PDF pages 1, 8, 14 — Play/Pause held three seconds opens MENU; nine Next presses reach LT audio delay. VOL adjusts in 10 ms increments up to 200 ms. Delay is mode-specific and digital-only; Play/Pause or ten seconds exits.Actual UK product 20014260 Instructions for use links this exact21-page English manual. No Bluetooth/AUX correction and no master-volume action after the LT screen has timed out. · Source checked 2026-11-09
Possible result
Checks completed — report the actual result
Completion does not automatically mean the problem is solved. Report what actually happened; no physical test or measured repair is claimed.
steps completed
Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.
Possible result
Stop at the unconfirmed condition
A required setup or response was not confirmed. Retain the actual observation and consult the exact source/partner manual or official support. Do not escalate to a reset, update installation, internal repair or unsafe wiring change.
next support
Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.
Possible result
A required fact is unknown
Confirm the actual model, connection, partner capability and state before continuing. Do not guess a menu, interrupt an installation or modify a live source by trial and error.
insufficient data
Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.