B6. Charging circuit
As NiMH batteries may not be continuously loaded with a
high charging current, the HQ562 has a timer IC (IC1).
This IC controls TS2 in such a way that a current of 200
mA is supplied to the battery for about 8 hours, after which
TS2 switches to a trickle charging current of 25 mA.
D3 and D4 suppress high voltage peaks.
This circuit is not required in the HQ561 because in this
shaver the NiCD battery is continuously charged at 200
mA via R8.
The value of R8 equals the internal resistance of TS2.
B7. Battery
The 4/5A NiCd battery of the HQ561 has a capacity of
1200mAH.
The capacity of the AA NiMH battery of the HQ562 is
1100 mAH.
B8. Motor
The motor is of the permanent magnet type.
Zener diode D7 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 TS5 makes it impossible to switch the motor on when
the shaver is connected to the mains, D7 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
D1
B2
D2
D3
D4
Pwrs
Ledn Vin
NiCd
NiMH
B6
B6
B3
B7
B8
R8
Iosc
Rs
Rd
Rc
Vcc
R6
A1
4/5A
NiCd
TS4
R7
TS2
Disn
Sco
R5
TS1
Enn
En
Sci
Scan
Gnd
Sel
IC1
R2
C1
R3
R4
R30
TS3
IC2d
PM
D7
D6
D5
B5
IC2c
IC2b
R31
L1
B4
R28
R29
C14
R27
C3
IC2a
C12
C13
TS5
C2
R25
R26
SK1
