B6. Charging circuit
As NiMH batteries may not be continuously loaded with a
high charging current, the HQ564 has a timer IC (IC1).
This IC controls TS4 in such a way that a current of 200
mA is supplied to the battery for about 8 hours, after which
TS4 switches to a trickle charging current of 25 mA.
D5 and D6 suppress high voltage peaks.
This circuit is not required in the HQ563 because in this
shaver the NiCd battery is continuously charged at 200 mA
via R11.
The value of R11 equals the internal resistance of TS4.
B7. Battery
The 4/5A NiCd battery of the HQ563 has a capacity of
1200mAH.
The capacity of the AA NiMH battery of the HQ564 is
1100 mAH.
B8. Motor
The motor is of the permanent magnet type.
Zener diode D4 suppresses high voltage peaks during
shaving.
Normally, this diode is placed between the motor solder
tags to suppress radio interference (RIF) in the mains as
well.
As TS1 makes it impossible to switch the motor on when
the shaver is connected to the mains, D4 is now placed on
the PCB.
GENERAL
Some resistors are not indicated in the electrical diagram.
These are resistors of 0 ½ which serve as jumpers across
print tracks or as interconnectors between the layers of the
double-layer PCB.
T1
a
b
c
C8
D8
SK2
B1
Re1
SK2c-a 200-240V
SK2c-b 100-130V
B1 power plug
B2 rectifier
B3 electronic on/off switch
B4 up-converter
B5 motor control
B6 charging circuit
B7 battery
B8 motor
R1
D3a
B2
D2
NiCd
B6
B6
R11
D5
D6
Pwrs
Disn
Full
Emp
Vcc
Eoo
Ctim
Rref
Ncel
Gnd
Mains
Dis
Duty
Rreo
Upc
Vac
Moo
Vbli
Vbr
Tacc
Tamb
Smot
Vin
Vcc
Iosc
Rs
Rd
Rc
En
Enn
Ledn
Sco
Sci
Scan
Gnd
Sel
IC1
R5
C4
R6
R7
R8
R9
C5
TS4
NiMH
TS3
C1
R2
R3
SK1
TS1
TS2
C3
R4
C6
L1
D2
B3 B4 B5
B7
C2
D3b
B8
PM
D4
A1
4/5A
NiCd
IC2
