Read Sharp R-5A53M (serv.man6) Technical Bulletin online
Sharp Electronics (UK) Limited
Originator AvW Supervisor Approval Date / / Reference EHR-074
Revision
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
R5A53-001
Month of Issue:
Classification: Immediate
MICROWAVE TECHNICAL BULLETIN
Page 1 of 1
MODELS
R5A53M
REASON
From serial number 10800051 ( Brown ) and 10800050 ( White ) a number of
components have been added to the Control PWB.
components have been added to the Control PWB.
ACTION
If necesssary fit the components listed below following the instructions.
If the model concerned has the old Control PWB fitted then carry out the follow
1. Remove resistor R1 and replace with a jumper link ( J1 ).
2. Change the jumper wire J12 to a resistor designated R85 ( 1k2, 0.25W ).
3. Add capacitor C85 ( 22uF, 50V ).
4. Add diode D85 ( 1SS270A ). C85 must be fitted as described below.
2. Change the jumper wire J12 to a resistor designated R85 ( 1k2, 0.25W ).
3. Add capacitor C85 ( 22uF, 50V ).
4. Add diode D85 ( 1SS270A ). C85 must be fitted as described below.
i)
Insert the negitive lead of the capacitor through the emitter hole of Q82
on the component side of the PWB and solder in place.
on the component side of the PWB and solder in place.
ii)
Insert the positive lead of the capcitor through the collector hole of Q82
and then to the base of Q83 on the print side of the PWB.
and then to the base of Q83 on the print side of the PWB.
iii)
Solder in place.
iv)
Cut off the excess lead on the print side of the PWB.
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
R85
Resistor 1k2, 0.25W
VRD-B12EF122J
AA
C85
Capacitor 22uF, 50V
RC-EZA311DREO
AB
D85
Diode, 1SS270A
VHD1SS270A/-1
AA
Display
