Life Fitness LS 9100, Руководство по обслуживанию

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Life Fitness 9100/9500HR Belt Drive Stairclimbers
THEORY OF OPERATION
The electronics system of the Life Fitness LS 9500HR and LS 9100 belt drive stairclimbers is made up of three
distinct modules; the Power Entry Module, the Display Console, and the Power Control Board.
120 volts AC enters the Power Entry Module. It passes through a transformer and is converted to 14 volts AC. The
14 volts AC is applied to the Power Control Board at connector J4, pins 1 and 2. The voltage passes through a
bridge rectifier, BR1 and is converted to an unregulated positive DC voltage. This unregulated voltage will vary from
11 volts DC to 18 volts DC depending on the wall supply and load. This voltage can be measured by placing the
positive probe of your DVM on Positive Test Point at BR1 and the negative probe on the negative Test Point at
BR1.
The other voltage developed on the Power Control Board is a regulated positive 8 volts DC. The regulated 8 volts
DC is developed by transistor (Q2) . This voltage can be measured by placing the positive probe of your DVM on
the collector (case) of Q2 and the negative probe on the anode of D1.
This 8 volts DC is supplied to the Console at connector J1, pin 4 and is used to power the LED’s. The 8 volts DC is
also used as a supply voltage for the positive 5 volt DC regulator (U1) on the Console board, which is VCC for the
Microprocessor. The Keypad entry (user’s input), Life Pulse (9500HR only), and Telemetry are all processed by the
Microprocessor.
The Console, by pulse width modulating the field control line, sends a signal to the Power Control Board at J1, pin
1. The Power Control Board switches the field current to the Alternator, through Q1. This field current along with
the energy supplied by the user is sent to the Load Resistors. This places resistance on the rotation, thus providing
the load sensation felt by the user.
The Alternator also provides the source for the RPM sensor circuit. The AC tap output on the Alternator enters the
Power Control Board at J2, pin 3. This AC voltage is wave conditioned and outputted at connector J1, pin 2 to the
Console connector P2, pin 6. Where it is processed and displayed by the Console.
PIN_ PAD STA C K
PI
N
_P
A
DS
TA
C
K
PIN _PA D STA CK PIN _PA D STA CK PIN _PA D STA CK PIN _PA D STA CK PIN _PA D STA CK PIN _PA D STA CK PIN _PA D STA CK
PIN_PADSTACK
PIN_PADSTACK
COMPONENT
PIN_PADSTACK
PIN
_P
AD
STA
C
K
PI
N
_P
A
DS
TA
C
K
PI
N
_P
A
DS
TA
C
K
PI
N
_P
A
DS
TA
C
K
PI
N
_P
A
DS
TA
C
K
COMPONENT
PIN_PADSTACK
PIN
_P
AD
STA
C
K
PIN
_P
AD
STA
C
K
PIN
_P
A
D
STA
C
K
PIN
_P
AD
STA
C
K
PIN _PA DSTA CK
PI
N
_P
A
DS
TA
C
K
PI
N
_P
A
DS
TA
C
K
PI
N_
PA
D
ST
A
C
K
PI
N_
PA
D
ST
A
C
K
PIN_PADSTACK
PI
N
_P
AD
ST
AC
K
PIN
_P
AD
ST
AC
K
PI
N_
PA
D
ST
A
C
K
PI
N
_P
A
DS
TA
C
K
PI
N
_P
A
DS
TA
C
K
PIN
_PA
DS
TA
C
K
PIN
_P
AD
STA
C
K
PIN
_P
AD
STA
C
K
PIN
_P
AD
STA
C
K
PIN
_P
AD
STA
C
K
PIN
_P
AD
STA
C
K
PI
N
_P
A
DS
TA
C
K
PIN
_PA
DS
TA
C
K
PI
N
_P
A
DS
TA
C
K
PI
N
_P
A
DS
TA
C
K
PI
N
_P
A
DS
TA
C
K
PI
N
_P
A
DS
TA
C
K
PI
N
_P
AD
ST
AC
K
PI
N
_P
AD
ST
AC
K
PIN
_P
AD
ST
AC
K
PI
N
_P
AD
ST
A
C
K
PI
N_
PA
D
ST
A
C
K
PI
N_
PA
D
ST
A
C
K
PIN_PADSTACK
PI
N
_P
A
D
ST
AC
K
PI
N
_P
AD
ST
A
C
K
COMPONENT
PI
N
_P
AD
ST
A
C
K
COMPONENT
PI
N
_P
AD
ST
AC
K
COMPONENT
PI
N
_P
AD
ST
AC
K
COMPONENTCOMPONENTCOMPONENTCOMPONENTCOMPONENT
1
C6
FU
SE
1
BR1
U3
HS3
HS1
HS4
C9
C5
Q1
D7
D6
J4
R9
R2
R1
R6 R16
R4
R5
R15 R3
R14
R7
R8
R17
R18
C11
C14
C12
C13
C7
C8
U1
AC
POS AC
WARNING:
RISK OF FIRE,REPLACE FUSE AS MARKED.
Q2
C 1997 A080-92167-A000 LIFE FITNESS
8
A
M
P
S.
B.
2
50
V
Neg
Q2
Pos
J4
14 VAC
8 VDC
+
_
D1
Neg
+
_
BR 1
18 VDC
J1
J2
ALTERNATOR
CONSOLE
Pin 3
RPM
Pin 4
8VDC
See Wiring Diagram for more detailed information