Section Three: Troubleshooting/Circuit Analysis
Refer to figure 3, power supply board schematic diagram analysis, or just replace
the board
Wire of remote
controller failure,
change it——
OK
Main PCB
board failure,
buttons
damage or
other reason,
replace the
wrong parts
——OK
Figure 3，Check if there’s any
loosen on the power switch or
plug, make sure there’s
AC220V power input; then
check if the fuse was burned
or not, if yes, replace it
No burning
again after
replaceme
nt——OK
Continue burning after
replacement, then turn to figure 3
and 4, check if there’s something
failure on main PCB board,
transformer or other parts
①Transformer coil burning
→cause the fuse
burning
②Transformer coil open→
no normal output
voltage
Refer to Section two to
distinguish the parameters of
transformer or charged
voltage measurement
method, as shown in figure 1,
measuring the input & output
voltage of transformer after
remote controller working
1. Power supply or power drive failure
2.Remote controller failure
3 .Transformer A38-220V-24V failure
The massage chair doesn’t work
DC5V switch
power failure
Other faults/power
board light, lighting
or not
Refer to physical map 4, 100471K MOV was broken
Refer to physical map 4, DCSV light doesn’t light
Refer to
physical
map 5,
schematic
diagram
analysis
Refer to physical map 4, commutation diode 4007, integrated TNY274,
optocoupler 817 or transformer JY1905 damage all would cause no DC5V
switch power supply
→remote controller and IC does not work( or no working voltage in relay
105LM coil, so the transformer A380-220V-24V without power supply)
→massage chair does not work
Replace the defective components or the whole drive board
Figure 1，Driving board failure
Figure 3, The schematic diagram of power supply part
on power supply board
This piezoresistor 10D471K
breakdown, will cause the input
power supply cutting-out, then cause
the fuse burning
Defective relay 105LM cause AC220V cannot
supply to transformer, then the massage chair
cannot start the massage functions
This audion S8050 on Q7 control the
relay coil flux or power cut
