Brother HE-800B Service Manual page 143

9. ELECTRIC MECHANISM
Error status #6 An error code is displayed during home position detection.
Probable causes
1. If zigzagging does not occur and
error E200 is displayed, there is a
malfunction of the power PCB.
2. If zigzagging does not occur and
error E200 is displayed, there is a
malfunction of the main PCB.
3. If zigzagging occurs slightly and
error E200 is displayed, there is a
malfunction of the encoder.
4. If zigzagging does not occur and
error E200 is displayed, there is a
malfunction of the pulse motor or
cord.
Check/ repair/ adjust
Disconnect connectors P1 (POWER2) and P24
(POWER1) from the main PCB, and then turn on
the power switch and check LD1 (red) on the
power PCB.
OK if illuminated.
After checking, turn off the power switch, wait for
one minute or more, and then insert P1 and P24
into the main PCB.
a. Disconnect connector P24 (POWER1) from
the main PCB, and check the continuity
between terminals 1 and 2 of P24.
OK if ∞ ohms.
b. Disconnect connector P21 (XPM) from the
main PCB, and check the continuity between
terminals 1 and 2, 3 and 4 of P21.
OK if ∞ ohms.
c. Insert P21 and P24 into the main PCB, turn on
the power switch and then check LD1 (red) on
the power PCB.
OK if illuminated.
If LD1 is illuminated during the check in step 1
but it does not illuminate when P1 and P24
are connected, there is a malfunction of the
main PCB.
d. Check LD1 (orange) on the main PCB.
OK if illuminated.
2717B
2718B
a. Check that connector P17 (X-ENC) is inserted
into the main PCB and that the color matches.
b. Check the encoder input while referring to
"3-7. Input checking method".
a. Disconnect the main PCB connector P21
(XPM) and measure the resistance between
pins 1-2 and 3-4 of the cord connector.
OK if 2-3 ohms.
b. If step a. (above) is OK, there is a malfunction
of the main PCB.
2719B
HE-800B
Parts to be replaced
Power PCB assembly
Main PCB assembly 800B
Pulse motor zigzag assembly
Main PCB assembly 800B
Pulse motor zigzag assembly
Main PCB assembly 800B
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