Brother RH-9820 Service Manual page 223

Problem #5 When the start switch is depressed, an error code [E200] is displayed.
Cause
1. If the X feed does not operate
and [E200] is displayed, there is
a blown fuse.
2. If the X feed does not operate
and [E200] is displayed, there is
a malfunction of the PMD P.C.
board or of the power supply
motor P.C. board.
3. If the feed mechanism does not
move and [E200] is displayed,
there is a malfunction of the
pulse motor or cord.
4. If the X feed moves slightly and
then [E200] is displayed, there
is a malfunction of the X axis
home position sensor (encoder).
Inspection/Remedy/Adjustment
Remove fuse F2 from the power supply motor
P.C. board and check the continuity.
OK if continuity
(If there is no continuity, carry out the inspections
in 2.)
1) Disconnect connector P9 (POWER1) from
the PMD P.C. board and measure the
resistance between pins 1-2 at connector P9.
OK if ∞ Ω; if 0 Ω, there is a malfunction of the
PMD P.C. board.
2) Measure the resistance between the fuse F2
terminal that is close to P6 (MAIN) and pin 2
of connector P7 (PMD) on the power supply
motor P.C. board. (D10 check)
OK if ∞ Ω
3) Disconnect connector P9 (POWER1) from
the PMD P.C. board, and then measure the
voltage between pins 1-2 of the cord-side
connector.
OK if approx. +100 V
After measuring, turn off the power, wait 5
minutes or more and then insert P9.
4) Disconnect connector P2 (POWER2) from
the PMD P.C. board, and then measure the
voltage between pins 1-2 of the cord-side
connector.
OK if approx. +16 V
After measuring, turn off the power, wait 5
minutes or more and then insert P2.
5) Check that connector P1 (MAIN) is inserted
into the PMD P.C. board.
4884Q
1) Disconnect connector P10 (XPM) 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 P10.
2) If 1) is OK, there is a malfunction of the PMD
P.C. board.
4885Q
1) Check that connector P20 (X-ENC) is
inserted into the main P.C. board.
2) Check the X axis home position sensor (encoder)
input while referring to " 2-6. Input checking
method".
RH-9820
8. ELECTRICAL MECHANISM
Replacement if a malfunction
Fuse
6A-250V
PMD P.C. board or power
supply motor P.C. board
Pulse motor assembly
PMD P.C. board
Pulse motor X assembly
214