The deepest board-repair reference: Bitmain AMTC factory diode-mode resistance values and per-model voltage architecture for Antminer hashboards.
Quick answer
This is the board-repair diode and voltage reference for 20 Antminer models — including Bitmain's own AMTC factory diode-test values for 8 S17/S19-family boards. IMPORTANT: those AMTC "diode" figures are RESISTANCE in ohms, read in a multimeter's diode mode, NOT a forward-voltage drop — never read them as volts. Each model lists chip, voltage domains, chips per board, nominal domain voltage and boost/input voltage.
A reference, not absolute pass/fail — meter and board batch shift the numbers. Measure your own board unpowered first; black probe to board ground, never the heatsink. Free CSV/JSON under CC BY 4.0.
Download CSV Download JSON REST API →
AMTC diode-mode resistanceDiode-mode resistance (Ω): BI/BO 1200±20, RST 1200±20, RX/RI 420±20, TX/CO 1200±20, CLK 1200±20, LDO1.8V 400±20, LDO0.8V 20±5
Powered pin voltages: BI/BO 0V; RST/RX/TX 1.7±0.1V; CLK 0.7-0.9V. Bitmain AMTC values, Fluke 15B+. Domain V 1.55 / total 18.5V from arch doc.
AMTC diode-mode resistanceDiode-mode resistance (Ω): BI/BO 1200±20, RST 1200±20, RX/RI 420±20, TX/CO 1200±20, CLK 1200±20, LDO1.8V 400±20, LDO0.8V 20±5
Powered pin voltages: BI/BO 0V; RST/RX/TX 1.7±0.1V; CLK 0.7-0.9V. BM1397 QFN-34, 12 domains per chip-gen table. Bitmain AMTC, Fluke 15B+.
AMTC diode-mode resistanceDiode-mode resistance (Ω): BI/BO 1015±50, RST 970±50, RX/RI 500±50, TX/CO 1015±50, CLK 1015±50, LDO1.8V 400±50, LDO0.8V 25±5
Different die rev: wider ±50 tolerances, lower impedance. Powered pins: BI/BO 0V; RST/RX/TX 1.7±0.1V; CLK 0.7-0.9V. BM1397.
AMTC diode-mode resistanceDiode-mode resistance (Ω): BI/BO 1200±20, RST 1200±20, RX/RI 420±20, TX/CO 1200±20, CLK 1200±20, LDO1.8V 400±20, LDO0.8V 20±5
Powered pin voltages: BI/BO 0V; RST/RX/TX 1.7±0.1V; CLK 0.7-0.9V. BM1393, 12 domains. Bitmain AMTC, Fluke 15B+.
AMTC diode-mode resistanceDiode-mode resistance (Ω): BI/BO 1200±20, RST 1200±20, RX/RI 420±20, TX/CO 1200±20, CLK 1200±20, LDO1.8V 400±20, LDO0.8V 20±5
Powered pin voltages: BI/BO 0V; RST/RX/TX 1.7±0.1V; CLK 0.7-0.9V. BM1397, 12 domains. Bitmain AMTC, Fluke 15B+.
AMTC diode-mode resistanceDiode-mode resistance (Ω): BI/BO 1015±50, RST 970±50, RX/RI 500±50, TX/CO 1015±50, CLK 1015±50, LDO1.8V 400±50, LDO0.8V 25±5
Matches S17e (same die rev). Powered pins: BI/BO 0V; RST/RX/TX 1.7±0.1V; CLK 0.7-0.9V. BM1397.
AMTC diode-mode resistanceDiode-mode resistance (Ω): BI/BO 1220±20, RST 980±20, RX/RI 390±20, TX/CO 1220±20, CLK 1220±20, 1.8V 440±20, 0.8V 20±5
76 chips / 38 domains (2/domain). Boost 14V in → 19V out. Powered pins: BI/BO 0V; RST/RX/TX 1.7±0.1V; CLK 0.7-0.9V. PIC U3, EEPROM U5.
AMTC diode-mode resistanceDiode-mode resistance (Ω): BI/BO 1220±20, RST 980±20, RX/RI 390±20, TX/CO 1220±20, CLK 1220±20, 1.8V 440±20, 0.8V 20±5
114 chips / 38 domains (3/domain). Boost 12.6V in → 20V out via Q9. Powered pins: BI/BO 0V; RST/RX/TX 1.7±0.1V; CLK 0.7-0.9V. PIC U6, EEPROM U10.
126 chips / 42 domains (3/domain). Boost output 19V. PIC + EEPROM present, 4 temp sensors, Y1 25MHz. No AMTC diode-resistance table given for this model.
110 chips; domains/chips-per-domain listed as 'Varies'. Domain voltage ~0.4V (Bible uses ~). Boost output 19V. BM1366. No AMTC diode-resistance table for this model.
108 chips / 12 domains (9/domain). Domain V ~1.2V (Bible uses ~). Boost ~25V via U206. No PIC. EEPROM U6, Y1 25MHz. No AMTC diode-resistance table given.
Domain V ~1.0V (Bible uses ~). Boost output ~21V. Chips/domains listed 'Varies'. No PIC. BM1370, Y1 25MHz. No AMTC diode-resistance table given.
91 chips / 13 domains (7/domain). Domain V ~1.04V (Bible uses ~). Boost output ~21V. 12 level shifters U1-U12. No PIC. No AMTC diode-resistance table given.
Domain V ~1.0V (Bible uses ~). Boost output ~21V. Chips/domains 'Varies'. No PIC. BM1370, Y1 25MHz. No AMTC diode-resistance table given.
63 chips / 21 domains (3/domain), total 8.4V. Signal levels: CLK 0.8-0.9V, CI/CO 0-0.4V, RI/RO 0-0.4V, RST 0-0.4V. No AMTC diode-resistance table given.
60 chips / 6 domains (10/domain), total 9.6V. BM1387. No AMTC diode-resistance table given.
72 chips / 12 domains (6/domain), total 9.6V. BM1485 (Scrypt). No AMTC diode-resistance table given.
72 chips / 12 domains (6/domain), total 18.36V. BM1391. No AMTC diode-resistance table given.
72 chips / 12 domains (6/domain), total 19.8V. BM1391. No AMTC diode-resistance table given.
AMTC diode-mode resistanceHealthy: all domains within ±50mV of each other. >100mV below average = partial short (failed chip/blown cap). Above average = open circuit (broken trace/cracked joint).
Bitmain AMTC diode values measured in diode/resistance mode with Fluke 15B+; other meters/board batches vary - use as reference not absolute pass/fail. Black probe to board ground, NEVER the heatsink (short risk). Unpowered domain-impedance check: low=short, high=open.
Source: the D-Central Mining Bible — DIODE_VOLTAGE_REFERENCE (Bitmain AMTC values, measured on a Fluke 15B+) and HASHBOARD_DIAGNOSTICS — plus the D-Central Laval ASIC repair bench (since 2016). Pairs with the fault finder and the ASIC chip database.
Last reviewed June 19, 2026.
We use cookies to improve your experience and analyze site traffic. Privacy Policy
Choose which cookies you allow. Essential cookies are required for the site to function and cannot be disabled.
Required for basic site functionality, shopping cart, and security. Always active.
Help us understand how visitors use our site so we can improve your experience. Includes Google Analytics.
Used to deliver relevant ads and track campaign performance across platforms.
