GOLDSTAR MV1725xx Service Manual

IMPORTANT NOTES:

UNIT MUST BE DISCONNECTED FROM ELEC­TRICAL OUTLET WHEN MAKING REPAIRS, RE­PLACEMENTS, ADJUSTMENTS AND CONTIN­UITY CHECKS. WAIT AT LEAST ONE MINUTE,
UNTIL THE HIGH VOLTAGE CAPACITOR IN THE
HIGH VOLTAGE POWER SUPPLY HAS FULLY
DISCHARGED.
THE CAPACITOR SHOULD BE DISCHARGED BY
USING INSULATED WIRE - I.E. TEST PROBE
CONNECTED TO 10K-OHM RESISTOR IN SERIES
TO GROUND.
WHEN RECONNECTING THE WIRE LEADS TO
ANY PART, MAKE SURE THE WIRING CONNE­CTIONS AND LEAD COLORS ARE CORRECTLY
MATCHED ACCORDING TO THE OVERALL CIR­CUIT DIAGRAM. (ESPECIALLY SWITCHES AND
HIGH VOLTAGE CIRCUIT.)

A. REMOVING POWER AND CONTROL

CIRCUIT BOARD (Figures 1, 2 and 3)

(1) Remove a screw securing the control panel

assembly to the oven cavity.
(2) Remove the control panel with pushing it upward.
(3) Remove the three connectors (CN1, CN2) and

wire leads (Relay2) from the circuit board.

(4) Remove 3 screws securing the circuit board.

(5) Remove the FPC connector from the terminal

socket following “HOW TO REMOVE THE FPC
CONNECTOR” on the next page.

(6) Remove the circuit board from the control bracket

carefully.

7-4

Circuit Board

FPC Connector(S1)

Control Bracket

Circuit Board

Figure 1

Figure 2

Figure 3

DISASSEMBLY INSTRUCTIONS

Control Panel

Screw

Power
Transformer

Relay 2

(CN2)

(CN2)

(Relay 2)

(CN1)

7-5

HOW TO REMOVE THE F.P.C. CONNECTOR

Follow the steps below as illustrated in Figures 4
and 5 to remove the F.P.C. connector.

(1) Hold the edges of the plastic fastener with

thumb and forefinger.
(Figure 4)

(2) Lift up the lever of the plastic fastener from

the terminal socket by lightly pressing the
lever end with forefinger.
(Figure 5)

(3) Remove the F.P.C. connector from the

terminal socket.

HOW TO INSERT THE F.P.C. CONNECTOR

Follow the steps below as illustrated in Figures 6
and 7 to insert the F.P.C. connector.
(1) Insert the F.P.C. connector into the terminal

socket securely with the fingers.

(2) Hold the plastic fastener with thumb and

forefinger of the other hand, and push it
slowly into the terminal socket. (Figure 6)
NOTE: When reconnecting the F.P.C

connector make sure that the holes
on the F.P.C. connector are properly
engaged with the hooks on the plastic
fastener

(3) Lock the level of the plastic fastener into the

hook of the terminal socket securely by
releasing the fingers.
(Figure 7)

Figure 4

Figure 7

Figure 6

Figure 5

Plastic fastener

Plastic fastener

Hook

F.P.C.
Connector

Plastic  fastener

Holes

Terminal
socket

F.P.C.
Connector

Hook

Terminal
socket

Holes

F.P.C.
Connector

Terminal
socket

Plastic
fastener

F.P.C.
Connector

Terminal
socket

B. REMOVING THE OUT CASE(Figure 8)

(1) Remove the vent grille by removing two screws

securing it to the out case.
(2) Remove two screws securing it to the air duct.
(3) Remove the mounting plate by turning the screws

(1 or 2 screws) securing it to the out case.
(4) Remove two screws on the left central edge and

one screws on the right central edge of Base

plate. Remove the Mount, All from the out case by

removing one screw securing it to the out case.
(5) Remove the outcase with disconnecting power

cord connector.

Vent Grille

Controller

(3 screws)

Door

Mounting
Plate

(1 or 2 screws)

Out Case

Mount,All

Figure 8

7-6