DOWNLOAD Sharp R-64 (serv.man5) Service Manual ↓ Size: 805.95 KB | Pages: 27 in PDF or view online for FREE

Model
R-64 (serv.man5)
Pages
27
Size
805.95 KB
Type
PDF
Document
Service Manual
Brand
Device
Home Appliance / Microwave Oven / Complete
File
r-64-sm5.pdf
Date

Sharp R-64 (serv.man5) Service Manual ▷ View online

R-64STM -13
COMPONENT REPLACEMENT
DOOR REPLACEMENT
1.
CARRY OUT 3D CHECKS.
2.
Remove choke cover taking care not to break
clips by inserting an iron plate (thickness of about
0.5mm) or flat type screw driver to the gap between
the choke cover and door panel , Refer to page 22
(door parts).
3.
Remove door assembly by lifting and easing
it forward.
4.
On reinstallation make sure the door is
parallel with the bottom line of the oven face
plate and the latch head pass through the
latch holes correctly.
5.
CARRY OUT 4R CHECKS.
NOTE : After any service to the door, the
approved microwave survey meter should be
used to assure in compliance with proper
microwave radiation standards.
Figure C-4.  Door Assembly Replacement and
Adjustment
LATCH HEAD REMOVAL
1.
Remove the choke as described in door
replacement.
2.
Unhook the spring and lift the latch head clear.
3.
Replacement, the reverse of the above.
INNER DOOR FILM
Removal
1.
Tear the door film from the door panel.
2.
Now the door film is free.
Installation
1.
Tear away the backing film.
2.
Put the pasted side of the door film on the door
panel.
DOOR PANEL ASSEMBLY
1.
Remove the choke as described in door replacement.
2. Remove door assy by removing screws (4).
3. Remove Glass Stopper Screw (noting position of
stopper) and slide stopper down while lifting up.
4. Slide glass towards Glass Stopper position and then
down towards the lower edge of the door frame.
5. Lift upper edge of glass, which will now be free from
upper clips and remove from lower clips.
6. Refitting is a reversal of the above when refitting,
ensure the glass and the glass stopper is in the original
position.
1. CARRY OUT 3D CHECKS.
2. Remove the control panel assembly referring to
"CONTROL PANEL REPLACEMENT".
3. Remove the open lever from the oven cavity front plate
by removing the control panel assy.
4. Disconnect the leads from all switches.
5. Remove the one (1) screw holding the latch hook to
the oven cavity.
6. Remove the latch hook.
7. Remove the switch(s) from the latch hook by pushing
the retaining tab backwards slightly and turning the
switch(s) on the post.
8. Now, the switch(s) is free.
LATCH SWITCH, MONITOR SWITCH AND STOP SWITCH REMOVAL
Figure C-6  Switches
Latch hook
Tab
SW3:  Stop switch
SW2: Monitor switch
SW1:  Monitored latch switch
Tab
Tab
Door film
Finger tab
Backing film
Figure C-5.  Inner Door film
NOTE: When carrying out any repair to the door,
do not bend or warp the slit choke (tabs on
the door panel assembly) to prevent
microwave leakage.
PIN
PIN
LOWER
OVEN HINGE
UPPER
OVEN HINGE
LOWER
OVEN HINGE
CHOKE COVER
DOOR
PANEL
DOOR SUB 
ASSEMBLY
SLIT CHOKE
R-64STM -14
RE-WIRING
Ensure the following:
1.
Wires must not touch:
a)
High voltage parts.
(Magnetron, high voltage transformer, high voltage capacitor and high voltage rectifier assembly)
b)
Parts that become hot.
(Heating elements, oven lamp, oven cavity magnetron and high voltage transformer)
c)
Sharp edges.
(Bottom plates, oven cavity, waveguide flange, chassis support and other metallic parts)
d)
Movable parts.
(Fan blade, any motor, switch, switch lever and open button)
2.
Positive lock connectors are fitted correctly.  Ensure the locking pin is located correctly.
3.
Wires are connected correctly as per pictorial diagram.
4.
No wire leads are trapped by the outer wrap.
WARNING: Before carrying out any work carry out 3D checks
1) Disconnect the supply.
2) Door opened, and wedged open.
3) Discharge high voltage capacitor.
WIRING / RE-WIRING
MICROWAVE MEASUREMENT
After any repair, the microwave oven must be checked for
microwave leakage to ensure continued safe operation
 BS EN 60335-2-25 specifies that the maximum permitted
leakage with a load of 275ml is 50 W/m
2
 (equivalent to
5mW/cm
2
) at a distance of 5cm from the oven.
PREPARATION
The following items are required to carry out this test:-
1.
A low form of 600ml beaker made from
electrically non-conductive material, such as
glass or plastic, with an inside diameter of
approximately 8.5cm. This must contain 275 
±
15ml of water, at an initial temperature of 20 
±
2
°C.
2.
A leakage detector which has been calibrated
within the preceding 12 months to a stand
whose accuracy can be traced to National
Physical Laboratory Standards.
Recommended instruments are:
Apollo "XI"
Celtec "A1000"
Before commencing the test, check the leakage detector is
functioning and adjusted according to the manufacturer's
instructions, and any spacers are fitted to ensure that
measurement is taken 5cm from the surface of the oven.
Dotted line indicates the path taken by the leakage detector.
Whilst the maximum leakage permitted in BS EN 60335-2-25 is 50 W/m
2
 (equivalent to 5mW/cm
2
), it is not
normal to detect anything significant, and therefore any detected leakage should be investigated.
PROCEDURE
1.
Place the beaker containing the water load
 in the oven cavity at the centre of the
turntable. The placing of this standard load in
the oven is important, not only to protect the
oven, but also to ensure that any leakage it is
not disguised by too large a load absorbing
the energy.
2.
Close the oven door, and with the power level
set to FULL, turn the oven ON with the timer
set for a few minutes operation. Should the
water begin to boil before the test has been
completed, it should be replaced.
3.
As shown in the diagram below, move the
probe slowly (not faster than 2.5cm/sec);-
a)
around the edge of the door following the gap
b)
across the face of the door
c)
across any vents in the oven's sides, rear or
top
R-64STM -15
SCHEMATIC DIAGRAM
CIRCUIT SUBJECT TO CHANGE
WITHOUT NOTICE.
DOOR CLOSED
COOK OFF CONDITION
Note:
AC CORD CONNECTION
BRN : BROWN
BLU : BLUE
G-Y : GREEN AND YELLOW STRIPE
NOTE:
* INDICATES COMPONENTS
WITH POTENTIALS
ABOVE 250V
LINE CROSS CAPACITOR
0.22
µF/AC250V
 HVT THERMOSTAT
 150
0
c - 96
0
c
MODEL : R-64STM
0.94
µF
230-240V
SWITCH
STOP
CONTROL
TURNTABLE
OVEN
MOTOR
FAN
MOTOR
LAMP
COM.
RY1
UNIT
COM.
A3
A1
RY2
RY3
TTM
FM
OL
AC2100V
F8A
FUSE
20A
MONITOR
SWITCH
OVEN
Z
50H
BRN
/18
BLU
/18
CUT OUT
THERMAL
B2
B1
HEATER
10M/0.5 W
G-Y/18
EARTH
FUSE
*
CAPACITOR
*
RECTIFIER
TRANSFORMER
*
POWER
*
MAGNETRON
RESISTOR 680K/0.5W
UNIT
FILTER
NOISE
NOISE SUPPRESSION COIL
DIAGRAM
SCHEMATIC
NO
LATCH
SWITCH
MONITORED
SW2
      SW1
SW3
LINE BYPASS
CAPACITOR
0.0047
µF/AC250V
LINE BYPASS
CAPACITOR
0.0047
µF/AC250V
NO
NO
NC
NO
NO
R-64STM -16
Figure S-1. Pictorial Diagram
PICTORIAL DIAGRAM
BLK
OVEN LAMP 
FM:
FAN MOTOR
BLU
WHT
WHT
BLU
HIGH VOLTAGE COMPONENTS
H.V.WIRE B
MG:
MAGNETRON
H.V.WIRE A
C: 
H.V. 
CAPACITOR
H.V.
RECTIFIER
T: HIGH VOLTAGE
    TRANSFORMER
NOISE FILTER
POWER SUPPLY CORD
F8A
FUSE
RED
RED
BRN
BLU
G/Y
5
4
WHT
3
2
1
COM
WHT
NO
NO
COM
STOP
SWITCH
NO
COM
GH:
GRILL HEATING 
ELEMENT
N
L
WHT
1
3
5
2
1
COM
NO
COM
NO
CN-B
RY3
RY2
GRN
CONTROL PANEL
BLU
BLU
BRN
TURNTABLE
MOTOR
RED
MONITOR
SWITCH
LATCH
SWITCH
BLK
BRN
BRN
BLK
CN-A
CN-A
1
CN-B
2
RED
GRN
BRN
BRN
BLU
W
H
T
B
L
K
B
R
N
W
H
T
B
L
U
B
R
N
B
L
U
B
L
K
B
L
U
W
H
T
B
L
K
W
H
T
W
H
T
R
E
D
LIVE
NEUTRAL
EARTH
  THERMAL
         CUT-OUT
     150
°C(OVEN)
WHT
BRN
WHT
20A
FUSE 
R
E
D
NC
Page of 27
Display

Click on the first or last page to see other R-64 (serv.man5) service manuals if exist.