2. A power switch or fuse box in Figure 4A power supply board 6A fuse burned together in Figure 4, it will be a high pressure discharge
line in Figure 5 CON16 power test plug pulled out again, if still burning fuse, indicating "A38- 220V-24V "toroidal transformer has been
burned, so you can replace the transformer. Otherwise, continue to the next Troubleshooting Power board, driver board and motor failure.
III. Power supply board Troubleshooting
1. The relationship of DC5V switching power supply and does not work problem
As Figure 5 Power board prior AC220V power input to a power strip CON1 →
good will "+ 5VA" and "GND" pin output by two CON22 plug DC5V to drive plate
→ driver board microcontroller and hand control have DC5V Operating voltage →
by hand control start → start signal was DC5V power pull →
then CON16 obtained at AC220V power →
toroidal transformer to obtain AC220V A38-220V-24V input power
by the power board CON22 of "JDQ" 105LM control relay coil,
then it has AC22V , AC19V and other output power →
drive plate to get all the necessary working power,
massage chair to boot normally work, solid no DC5VA power is not switched on.
In summary, there is no output DC5V The power board can be judged
bad power supply board fault. Apart from the available multimeter to test the
power supply board "GND" and "5VA" to determine whether the two pin-point
DC5VA, but also by observing the power indicator to determine the power
supply board, namely 7 + 5VA LEDs as the power indicator light, when the power switch is turned on after the massage chair + 5VA
indicator light indicates that the power board is normal, otherwise explain bad power supply board, then you can repair or replace the
power board.
Figure 7 Power light of the power PCB board
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