Extron electronic 3200s Checking/Replacing the BME Internal Power Supply AC Input Fuses, Primary

into the fuse-holder slot (the fuse-holder is located just below the power switch). Pry the fuse-holder out, it contains the AC input fuse plus a spare. If may be obvious that the fuse is blown, if not, check it with an ohmmeter or any other continuity device if available. If the fuse is blown, replace it with the provided spare. Plug the AC power cord in and Power the BME ON. Verify that the unit powered ON correctly (check Front Panel LEDs). If the LEDs are in the proper state, the problem has been corrected. If not, contact Extron Technical Support.

AC POWER INPUT

FUSE: 250V 0.8A TT

100-240V 0.5A MAX 50/60Hz

Checking/Replacing the BME Internal Power Supply AC Input Fuses

Each internal power supply has an AC input fuse. If a power supply fuse blows, the Front Panel LED for that power supply will go OFF (it is normally solid ON). If the BME has redundant power supplies, the redundant supply for the failed power supply will assume the full load and its front panel diagnostic LED will blink indicating that the Main (Primary) power supply is inoperative. To check/replace a power supply fuse, unplug the AC power cord from the BME rear panel, remove the Access Panel (see Page 5-3). The power supply fuse location is shown in Figure 5-6.A (circled). Remove the fuse from the problem power supply. If may be obvious that the fuse is blown, if not, check it with an ohmmeter or any other continuity device if available. If the fuse is blown, replace it, plug the AC power cord in, power up the BME and check Diagnostic LEDs. If the problem persists, call Extron Technical Support.

Primary V+

Power Supply

Fuse 19

	J1
20	1
	2

Redundant V+ Power Supply would be located here

POWER+V
-VSUPPLIES
PRIMARY
REDUNDANT TX RS232
RX COMMUNICATIONSBME
DIAGNOSTICS	REMOTE	SYSTEM
		STATUS
		Primary V-
		Power Supply
		(Redundant V-
		would be
		located beside
		Primary V-)

Figure 5-6.A BME exploded view

POWER SUPPLIES	COMMUNICATIONS			SYSTEM
+V -V
	RS232	BME	REMOTE	STATUS
PRIMARY	TX

REDUNDANTRX

DIAGNOSTICS

Matrix 3200/6400 Series • Upgrades and Troubleshooting 5-7