20
S E R V I C E
M A N U A L
L A S E R H E A T I N G S Y S T E M S
4-1
Resistor/Capacitor Value
Resistor Value
COMPONENT
Laser300
Laser530
Laser560
Laser
730/730AT
Igniter at cold condition (73°F(23°))
17
Ω
±10%
Transformer (TF1)
Primary Side
1
to
3
3.7
Ω
±30%
Secondary Side
5
to
6
0.6
Ω
±30%
Secondary Side
7
to
8
0.7
Ω
±30%
Secondary Side
9
to
0
0.2
Ω
±30%
Transformer (TF2)
Primary Side
1
to
4
800
Ω
±20%
Secondary Side
5
to
8
1.2k
Ω
±20%
Circulation Fan Motor
300
Ω
±10%
84
Ω
±10%
450
Ω
±10% 230
Ω
±10%
Combustion Blower Motor
27
Ω
±20%
22
Ω
±20%
22
Ω
±20%
11
Ω
±20%
Thermistor (at 77°F(25°))
10k
Ω
±5%
Fuel Pump (coil)
95
Ω
±25
Ω
Component Voltage Readings
COMPONENT
READING TAKEN AT
Laser300
Laser530
Laser560
Laser
730/730AT
Fuel Pump
F.P (CN17) OR to YL (•••)
DC 24V±15%
Igniter
I.H (CN2)
AC 120V±15%
Transformer (TF1)
“TP-5V” to “F.R (GN) (CN6)”
DC 5V±15%
“TP-12V” to “F.R (GN) (CN6)”
DC 12V±15%
“TP-28V” to “F.R (GN) (CN6)”
DC 28V±15%
Transformer
(TF2)
Primary Side
1
to
4
AC 120V±15%
Secondary Side
5
to
8
AC 140V±15%
Circulation Fan Motor
F.M (CN4)
Motor
connected
High
AC 118V±15% AC 118V±15% AC 118V±15% AC 118V±15%
Medium
AC 101V±15% AC 101V±15% AC 93V±15% AC 93V±15%
Low
AC 83V±15% AC 83V±15% AC 34V±15% AC 34V±15%
Combustion Blower Motor
B.M (CN3)
Motor
connected
High
AC 80V±15% AC 102V±15% AC 97V±15% AC 98V±15%
Medium
AC 71V±15% AC 93V±15% AC 77V±15% AC 75V±15%
Low
AC 60V±15% AC 80V±15% AC 69V±15% AC 67V±15%
Revolution Sensor (CN12)
RD (+) to BL (-)
DC 5V±15%
WT (S) to BL (-) (in operation)
DC 2.5V±15%
Trouble Shooting
Section 4
