Brother RH-9820 Service Manual page 224

8. ELECTRICAL MECHANISM
Problem #6 When the start switch is depressed, an error code [E210] is displayed.
Cause
1. If the feed mechanism does not
move and [E210] is displayed,
there is a malfunction of the
pulse motor or cord.
2. If the Y feed moves and then
[E210] is displayed, there is a
malfunction of the Y axis home
position sensor
sensor).
Problem #7 When the start switch is depressed, an error code [E220] is displayed.
Cause
1. If the θ pulse motor does not
move and [E220] is displayed,
there is a malfunction of the
pulse motor or cord.
2. If the θ pulse motor moves
slightly and then
displayed, there is a malfunction
of the θ shaft home position
sensor (encoder).
215
Inspection/Remedy/Adjustment
1) Disconnect connector P8 (YPM) from the
PMD P.C. board, and measure the resistance
between pins 1-2 and 3-4 at the cord-side
connector.
OK if 2-3 Ω
After measuring, insert P8.
2) If 1) is OK, there is a malfunction of the PMD
P.C. board.
4886Q
1) Check that connector P8 (SENSOR1) is
inserted into the main P.C. board.
2) Check the Y axis home position sensor input
(proximity while referring to "2-6. Input checking
method".
3) If a metallic object is brought close to the Y
axis home position sensor and the LED
inside the sensor does not illuminate, there is
a malfunction of the sensor.
Inspection/Remedy/Adjustment
1) Disconnect connector P3 (PPM) from the
PMD P.C. board, and measure the resistance
between pins 1-2 and 3-4 at the cord-side
connector.
OK if 2-3 Ω
After measuring, insert P3.
2) If 1) is OK, there is a malfunction of the PMD
P.C. board.
4888Q
1) Check that connector P5 (P-ENC) is inserted
into the main P.C. board.
[E220] is
2) Check the θ axis home position sensor
(encoder) input while referring to "2-6. Input
checking method".
RH-9820
Replacement if a malfunction
Pulse motor Y assembly
PMD P.C. board
Y axis home position sensor
Replacement if a malfunction
Pulse motor P assembly
PMD P.C. board
Pulse motor P assembly