Technical Information - Philips Sunmobile 4S HB 971/A Service Manual

M4
L
M3
R9
C11
T1
M2
N
M1

TECHNICAL INFORMATION

Tanning appliance HB971 is equipped with a universal
power PCB.
This means that the specific characteristics of the
appliance have to be programmed in a microcontroller
to determine the way in which various components
are activated.
When the mains plug is inserted into the wall socket,
the display of the remote control will show all functions
available to the user.
Including the various combinations, these functions
are:
time setting
full body tanning
full body + facial tanning
half body + facial tanning
half body tanning
The UV lamps may produce a humming sound just
after start-up. This humming sound will stop as soon
as the lamps burn properly, which is after about
20 seconds. At this point the light intensity clearly
increases.
During the last minute of the session the beeper
produces an intermittent signal to alert the user to the
fact that a new session can be set.
Tr1
Tr2
Tr3
Tr4
Tr5
Tr6
Tr7
Tr8
TCO1
"C
R7
R5 R10
R6
L
C2
C4
C3
C1
L
M1
N
IR
L1B
B1
L1A
B9
C7 L6
B7
L2
B8
C8 L7
B6
L3
B3
C9 L8
B5
L4
B2
C10 L9
B4
IR
R8
C12
safety
Re1
After pressing the key, the display showing
the UV working hours will be shown. After 750
operating hours, an L will automatically appear on the
display to indicate that the HPA lamps need to be
replaced or the tanning time must be slightly
increased.
The clock speed of the µ-controller is derived from the
50 Hz mains frequency.
This frequency is also used to control the 8 triacs that
determine the switch-in point (soft start) of the cos !
capacitors and the HPA lamps.
The fans are switched via the safety relay.
This relay is part of the (one fault condition) timer
circuit.
If the control of the triacs is disturbed due to a fault in
the µ-controller, the UV lamps may not be switched
off.
As the µ-controller also generates a pulsating direct
voltage to power the relay, the relay will be
de-energised in case of a fault, thereby interrupting
the lamp circuit.
Conversely, the appliance will not start if the switch
contacts of the relay are closed at that moment
(sticking contacts).
The remote control is galvanically isolated from the
mains, with power supply and control taking place via
a 4-core cable.
The remote control only functions as input/output
terminal.
C1
C2
C3
C4
M2
TCO2 SK2
La
1
La
SK5 SK3
2
M3
La
3
SK6 TCO3
La
4
TCO4 SK4 M4
N N
and,