Philips HB955/A Service Manual

Philips Domestic Appliances and Personal Care
Service Manual
PRODUCT INFORMATION
Tanning and relax appliance HB955 is equipped with a
universal power PCB.
This means that the specifi c 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
half body tanning
relax session
UV working hours
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.
Published by Philips Domestic Appliances and Personal Care
05/04
After pressing 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 ϕ
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.
The IR lamps are started by means of the conventional phase
cut-in principle and burn at full power after about 8 seconds.
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HPA Solarium
HB955/A
Sunmobile
key, the display showing and
Subject to modification
, the