Fan Ipdu P.c. Board (Mcc-1610) - Toshiba MMD-AP0726HP-UL Service Manual

10-2. Fan IPDU P.C. Board (MCC-1610)

Replacement steps:
[Remove PCB]
(1) Turn off the power supply of the indoor unit and allow at least one minute for the capacitor to discharge.
Confirm that the light of the LED (D640) fades away.
(2) Remove all the connectors which are connected to the FAN IPDU. (Remove the connectors by pulling
the connector body. Do not pull the wire, because there are some rocks in connector).
(3) Remove all the five screws (a) which secures the FAN IPDU to the Heat sink.(These screws are to be
re-used after procedure.)
(4) Remove the Fan IPDU from four PCB spacer (b).
Black White Red
leads from motor
Figure1 PCB outline
[Set PCB]
(5) Confirm that no dirt or damage is on the sub heat sink. And don't forget to set sub heat sink. As it can
reduce the heat transfer efficiency, and cause a breakdown.
(6) Screw the FAN IPDU to the heat sink using the five screws that were removed in step (3). If the screws
are loose, the effected component will generate heat, and cause in to breakdown. Do not use an electric
driver or an air driver, as it can cause component damage. The torque of 5 screws (IC701, DB509,
DB510 and Q590) is "0.41 lbs
(7) Re-connect the connectors. Be sure that all the connectors are connected correctly and securely
inserted.
(8) Install the cover, then turn on the supply. Check the operation.
10-3. N/F P.C. Board (MCC-1551) Replacement Procedure
(1) Turn off the power supply of the indoor unit
(2) Remove all the connectors and remove ground lead from metals. (Remove the connectors by pulling
the connector body. Do not pull the wire, because there are some rocks in connector).
(3) Remove the Fan IPDU from four PCB spacer (a).
(4) After changing PCB, re-connect the connectors. Be sure that all the connectors are connected correctly
and securely inserted. And Screw to ground lead.
(5) Install the cover, then turn on the supply. Check the operation.
Connection points
LED(D640)
(a)Screw
PCB(MCC1610)
(b)Spacer
· ·
ft (0.55N m)".
Power terminal side
- 81 -
Figure2 After removing PCB
Connection points
Sub-Heat sink
FAN IPDU side
Ground lead
(a)Spacer