Sharp R-7A54 Service Manual

Convection microwave oven
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R-7A54
SHARP
SERVICE MANUAL
CONVECTION
MICROWAVE
OVEN
In interests
of user-safety
the oven
should
be restored
to its original
condition
and only
manufacturer
original
spare
parts must
be used.
(RDI
6101 l.)
This is a supplemental
Service
Manuai
for Model
R-7A54.
This model
is quite
similar
to Base Model
R-7H52
{Refer
No. is SX007R7A52PJZ).
Use this supplemental
manual
together
with
the Base Model
Service
Manual.
Refer to the Base Model
Service
Manual
for complete
operation,
service
information,
etc.
( RD171 Of U)
TABLE
OF CONTENTS
Page
CAUTION,
MICROWAVE
RADIATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
GENERAL
IMPORTANT
INFORMATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
PRODUCT
SPECIFICATIONS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
APPEARANCE
VIEW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ................
3
SERVICING
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..'...............................................................................................
4
TEST PROCEDURE
..,...........,....,,......................................................................................................................
5
WIRING
DIAGRAM
. . . . . . . . ..~.....................*.......................................*........*............*...........................................
8
PICTORIAL
DIAGRAM
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...........
9
CONTROL
PANEL
CIRCUIT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..^.....................................~.......................
IO
PRINTED
WIRING
BOARD
. . . . . . . . . , . . . . . , . . . . . . . . . ..>. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . , . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . .
1 1
PARTS
LIST
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . *. . . . . . . . . . . . . . . . .*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ,. . . . . . . . . . . . . . . . . , . . . . . . . . . . . , . . . . . , , .
1 2
PACKING
AND
ACCESSORIES
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..*...........................
18
SHARP CORPORATION

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Summary of Contents for Sharp R-7A54

  • Page 1 R-7A54 SHARP SERVICE MANUAL CONVECTION MICROWAVE OVEN In interests of user-safety the oven should be restored to its original condition and only manufacturer original spare parts must be used. (RDI 6101 l.) This is a supplemental Service Manuai for Model R-7A54.
  • Page 2 R-7A54 SERVICE MANUAL SHARP PRODUCT SPECIFICATIONS CONVECTION MICROWAVE OVEN APPEARANCE VIEW R-7A54 SERVICING GENERAL IMPORTANT INFORMATION This Manual has been prepared to provide Sharp Corp. Service engineers with Operation and Service Information. TEST PROCEDURE It is recommended that service engineers...
  • Page 3 R-7A!54 PRODUCT SPECIFICATIONS SPECIFICATION ITEM DESCRIPTION Power Requirements 1 240 Volts / 50 Hertz 1 Single phase, 3 wire earthed 1.5 kW Approx. 6.5A Power Consumption I Microwave cooking Approx. 6.7A Convection cooking 1.6 kW Power Output 850W (IEC-705-1988) 750 watts nominal of RF microwave energy...
  • Page 4 APPEARANCE VIEW Place the roller stay on the copiing in the 12.Power supply cord 7. Wave guide cover 1. Ventilation openings 2. Hinges 8. Touch control panel oven and seat the turntable on the roller 13.Roller stay 9. Digital readout 3.
  • Page 5 If the water remains cold lated screwdriver. carry checks re-examine con- nections to the component being tested. Sharp recommend that wherever possible fault-finding is carried out with the supply discon- nected. It may some cases, necessary...
  • Page 6 R-7A54 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER MAGNETRON TEST I NEVER TOUCH PART IN THE CIRCUIT WITH YOUR HAND OR AN INSULATED i TOOL WHILE THE OVEN IS IN OPERATION. CARRY OUT 3D CHECKS Isolate the magnetron from the high voltage...
  • Page 7 R -7A54 ‘D TEST PROCEDURES (CONT’D) PROCEDURE COMPONENT TEST LETTER (T2 OC) (Tl OC) (T2 OC) Heat up for Imin. 52 sec. (RD82A02U) MICROWAVE OUTPUT POWER (IEC-7054988) The following test procedure should be carried out with the microwave oven in a fully assembled condition (outer...
  • Page 8 TEST PROCEDURES (CONT’D) PROCEDURE LETTER COMPONENT TEST Measuring method: 1. Measure the initial temperature of the water before the water is added to the vessel. (Example: The initial temperature = 11 “C) 2. Add the 1 litre water to the vessel. Place the load on the centre of the shelf.
  • Page 9 K7A54 2 Lj...
  • Page 10 R-7A54 ‘D OK0 ,I 5 .- .ii IL...
  • Page 11 R-7A54 __~-~ /-,-,-! ’ Ii q SE rr I i ’ AArA-I, ’ ):!2*i T,\, t(o99tvZL d--- ~ -3 i4iF ;I+--i I iL’(y-1 I!,,,, l/II ill! I1Iil 8, I...
  • Page 12 R -7A54...
  • Page 13 PARTS LIST Note : The voltage supplied to the parts rr*m are greater than 250V. REF. NO. PART DESCRIPTION 107~ ICODE ELECTRIC PARTS FH-HZAOllWREO Thermistor QSOCLAOllWREO Oven lamp socket l- 2 RHET-A096WREO Convection heater l- 3 RMOTEA062WREO Convection motor RTHM-AOOlWREO Thermal cut-out 175°C (OVEN)
  • Page 15 are awatm Nntp vnltano c~~nnlier( ~afl~ m*rr than *_-.- .V’L”JY “Yp#y.n”” C” LIIti -1.v. L..“. .-WY. I--.-- REF. NO. PART DESCRIPTION 07-Y CODE LANGQA094WRWO Thermal cut-out angle 4-30 4-31 PDUC-A403WRFO Fan duct 4-32 LANGFA13OWRPO Sub support plate LANGTA252WRPO Chassis support 4-33 LBSHC0032WREO Cord bushing...
  • Page 17 R -7A54 I !Li#. li !j ,,_ _: 6 iL- - . . 23 .“‘a -@ 1-16...
  • Page 18 R-7A54 / /’ I‘ a I- ’ ,._1 ._--. ._.~_...
  • Page 19 MISCELLANEOUS D’ PACKING ACCESSORIES PACKING C”4DPBA057WRKO‘ WRAP COVER BROILING TRIVET CIAKING RACK ’ \S P F’ TURNTABLE TRAY PRINTED MATERIAL TURNTABLE SUPPORT --q-Y- TRAY PACKING FOAM (SPADPA368WREO) PACKING CASE iSPAKCCO14WREOI ‘H Replaceable items ‘92 SHARP CORP. (9U0.72E) Printed in Australia...

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