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• The STANG ST-620+ is programmed either
1) by typing in the correct three- or four-digit manufacturer code, or
2) by letting the remote search through its internal code library until the controlled device (TV, DVD, STB, etc.) reacts.
• In both cases you:
– place fresh batteries,
– keep the proper DEVICE key (TV, DVD, SAT, AUX) pressed while entering “SET”,
– introduce the code or launch the auto-scan,
– confirm with OK/ENTER or the DEVICE key as soon as the target device switches off, then test power, volume and channel keys.
Hardware pre-check
• Two AAA batteries, correct polarity, clean contacts.
• Verify IR LED with a smartphone camera: you should see the diode flash when you press any button.
Programming method A – Direct code entry
a. Switch ON the device to be controlled.
b. Press and hold the DEVICE button (e.g. TV) ≈ 3 s → LED stays ON.
c. While LED is steady, press the small SET (or SETUP/MAGIC) key once → LED blinks once and stays ON.
d. Enter the 3-/4-digit code from the ST-620+ list. After the last digit the LED turns OFF = code accepted.
e. Test POWER; if OK, verify volume, channels, menu. Otherwise repeat from step b with the next code.
Programming method B – Auto-search / code scan
a. Turn ON the device and aim the remote at it from ≤ 1.5 m.
b. Keep DEVICE button pressed (TV/DVD/SAT/AUX) until LED is steady.
c. Briefly press SET once → LED starts to flash (~1 Hz) = scan mode.
d. Press POWER (or CH+) every second; with each press the remote transmits the next code.
e. The moment the device reacts (turns OFF, mutes, volume bar appears) immediately press OK/ENTER or the DEVICE key to lock the current code.
f. Test all functions; if only partially working, resume the scan (repeat steps c–e).
Programming method C – Brand search (optional, faster than full scan)
a. DEVICE + SET → LED ON.
b. Press one digit that represents the brand group (chart in manual).
c. Then press POWER repeatedly until the device reacts, confirm with OK.
Factory reset (clears all stored codes)
Hold SET + POWER for ≈ 5 s → LED flashes three times → remote returns to default state.
Typical LED behaviours (multiple PCB revisions exist)
• Steady ON = ready for code input
• Slow blink = auto-scan
• Fast double-blink = invalid/unknown code
Functional verification checklist
Power ✓ Volume ± Channel ± Numeric pad ✓ Menu/OK/ARROWS ✓
If any group fails, continue scanning – many brands have ≥ 10 codes.
• User reports on elektroda .com and YouTube (2023-2024) confirm the above sequences and add that some batches omit the dedicated SET key; on those units the combination is DEVICE + POWER to enter scan mode.
• Most smart-TV models produced after ~2022 use extended NEC or RC6 variants not stored in legacy ST-620+ libraries; success rate drops to ~70 %.
• Market trend: inexpensive IR-to-Bluetooth bridges and smartphone IR-blasters are replacing low-end universals; nonetheless ST-620+ remains popular as a cost-saving spare for hotels and rentals.
• Why “confirm immediately”? – During auto-scan the remote increments its internal code counter every 0.8-1.2 s; if you wait one extra step the right code is skipped.
• Battery low = IR amplitude < 200 mW → many TVs still see POWER but ignore data frames; always retest with fresh cells before blaming the procedure.
• Using a phone camera to “see” IR avoids the need for an oscilloscope.
• IR codes are not copyrighted; cloning them is legal.
• Avoid programming while driving set-top boxes in hospitals or public areas where unintended power-off could disrupt service.
• Dispose of depleted alkaline cells according to local WEEE regulations.
• Keep the remote within 30–50 cm for programming; codes are sent in bursts and some TV receivers attenuate IR when the set is ON.
• Write the final code on a sticker inside the battery cover for later reuse.
• If several TVs of the same brand exist in the room, cover unwanted sets with cardboard during auto-scan to prevent accidental capture.
• Some ST-620+ units sold as “Plus” are clones with different firmware; if no combination lights the LED, search for model ST-620B or ST-620S manuals.
• The internal library rarely supports air-conditioners, soundbars using Bluetooth, or RF-only devices.
• Dump IR frames with an Arduino + TSOP-receiver to identify the exact code set and share with community databases (e.g. IRDB).
• Explore ESP-Home-based gateways for multi-protocol control.
• Compare learning-capable remotes (e.g. Logitech Harmony, Xiaomi Universal IR) for broader device coverage.
Programming the STANG ST-620+ requires entering setup mode (DEVICE + SET), then either typing the right 3-/4-digit code or letting the remote cycle through its library until your device responds; confirm immediately, test all keys, and repeat if functions are missing. A full reset (SET + POWER 5 s) clears mistakes. Success hinges on fresh batteries, direct line-of-sight, and rapid confirmation when the target reacts.
