I have 12 volts on the PS output to the L19E CCA but I don't have schematics to troubleshoot further. the display is blank the power light is green for approsx 30 sec then turns to solid amber. Any input? Thanks [email protected]

Contact Bernina directly to inquire about availability of diagrams.

The generator should be ok to use with lighting and power tools and suchlike but with equipment incorporating computers and computer equipment it would be wise to get the displays fixed in order to be able to monitor the output and protect the equipment.

Not sure why the display won't work. Displays these days are essentially a low voltage device and so some sort of interface will be employed to reduce the voltage to a suitable level, unless the genny also has a 12 volt output and this is employed to drive the display. Unless you enjoy puzzles a circuit diagram will be necessary.

Sounds like either a blown mainpower fuse or the thermal fuse for the power transformer. If the protect circuit was kicking in, the display would light up, but then turn off with a red blinking light. the green light with no display means the transformer is not getting power.

Amber light on means standby voltage is high. IF amber light does not go white when power button is pushed the its one of two things.
A. No power on command from main board. Usually labeled PS-On. Should go high from 3.3v or maybe 5volts. If not present Main is defective.

B. If the ps-on line is going high then your problem is a defective power supply.

You need a PS, but don't take my word for it, test the Power Supply's 3 main voltages with a multimeter.

[ 3.3 Volts, 5 Volts, and 12 Volts, http://en.wikipedia.org/wiki/Computer_power_supply ]

An economical multimeter can be purchased for as little as $5 to $12.

Regards,
joecoolvette

E1 is a 100 uF 16 VDC capacitor. I have been repairing these units lately and have experienced some of the same symptoms (LED goes red but doesn't transition to green after 30 seconds like it should). I have been able to repair some of these units. Make sure the power supply is working properly before spending significant time on the D2A board. The power supply is responsible for supplying 12, 5, and 3.3 VDC to the D2A board. A defective PS will measure 14.5 instead of 12, 6 instead of 5, and 2.9 instead of 3.3. The AC ripple should be about 5 mV on the 3.3 and the 5 volt supplies when loaded. The 12 volt can be as high as 50 mV on a good PS. The culprits are C12 (1000uf) and C10 (470 uf) which are the filter capacitors for the 3.3 and 5V outputs respectively. C12, the capacitor for the 3.3 V output is especially critical because it is used to feed the voltage regulator and overvoltage shutdown circuit. D7 is a hot part and can also fail sometimes. I have repaired 50% of my units just by changing these capacitors. I still have units where the D2A board is bad with a known good power supply. If anyone has more info on the D2A (like a schematic) please pass it along

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Look to see if you do have 12~18vdc feeding the backlight inverter board (located on the left side of the monitor), it can also have blown fuses on the inverter board. Post back what you see inside so we can guide you further, this is really old monitor, 2002.

The control systems on power mobility equipment have a "prevent" circuit that immobilizes the equipment while it is plugged into a charger, so folks won't take off with it plugged into the wall outlet. When you turn it on when plugged into a charger, the display will flash constantly, or sweep constantly, depending on the manufacturer. This is normal. Your off-board charger should have a red light to indicate power to the charger, and another light for the charge status. Yellowish means it is charging, when it turns green, you are fully charged. If the status light is green all the time, that is an indication that the charger is not functioning properly, or that the batteries are below a chargeable state. Check charger output, which should be 26-28 volts dc, and each battery should show at least a 12 volt reading, but around 13.5 volts with a full charge. If one or both of the batteries drops below 12 volts after a short period of time, it's time for a fresh pair. Fully charge new ones before using the chair.

Generally a "protect" mode would be triggered by a shorted output (speaker). I would suggest disconnection all of the speakers to see if the red light goes off.