Noise Filter P.c.board Replacement Procedure - Toshiba MCY-MUG0401HSW-E Service Manual

11-3.Noise filter P.C.board Replacement
Procedure
1. Shipped parts list
Please make sure that before you do the work, the following parts are shipped all.
No
1 P.C.board Replacement Procedure Manual (English and Chinese each 1page A4 paper double side print.)
2 Service P.C.board MCC-1690 (IPDU P.C.board)
2. Replacement steps
(1) Turn off the power of the outdoor control unit. (Turn off the power of the outdoor unit.)
(2) Immediately after turning off the power of the outdoor unit, the electrolytic capacitors inside the unit will still have a high
voltage, and there is a risk of electric shocks. Therefore, wait at least 5 minutes after turning off the power before starting
the replacement procedure.
(3) Disconnect all the screws and connectors which are connected to the malfunctioning noise filter P.C. board.
(Since the connectors may be damaged if they are pulled out by grasping their lead wires, be sure to take hold of the
connectors themselves when disconnecting them.)
(4) Remove the malfunctioning noise filter P.C. board from the two card edge spacers ① and two single-touch spacers ② .
(5) The screws and single-touch spacers ② which were removed will be used again when the service P.C. board is installed so
keep them in a safe place to ensure that they will not be lost or misplaced.
(6) When replacing the board, install the removed single-touch spacers② on the service P.C. board, and install the board in the
outdoor control unit. (Tightening torque for screws ③ (M3x20) used to secure single-touch spacers ② : 0.55 ±0.1 N•m)
(7) When replacing the board, use the removed screws ④ and screws ⑤ (M4x ８ ) to connect the disconnected lead wires
following the wiring diagram display panel. (Check that the wires have been inserted correctly and securely to prevent
connection errors.)
(8) If screws ④ and screws ⑤ are not tightened sufficiently, the contact between the terminals will deteriorate, possibly causing
malfunctioning so pay attention when tightening the screws. However, under no circumstances must power-driven
screwdrivers or air screwdrivers be used when installing the replacement P.C. board using such a device may damage the
components. (Screw ④ , ⑤ tightening torque : 1.2 ±0.1 N•m)
(9) If any of the components on the P.C. board have been bent in the course of the replacing the board, rework them so that
they do not come into contact with the other components.
(10) Install the cover, turn on the power, and check operation.
② Single-touch spacer
③ Screw(M3×20)
After removing
screw ③ , remove
the P.C. board
assembly.
① Card edge spacer
Push this in the
direction of the arrow to
unlock and remove the
P.C. board assembly.
Parts name
241
Noise filter P.C.board
④ Screws (M4x8)
Used to secure lead wires
Screw tightening torque:
1.2 ±0.1 N•m
⑤ Screws (M4x8)
Used for grounding
Screw tightening torque:
1.2 ±0.1 N•m
Quantity
1
1