Sharp DV-5132H (serv.man6) Service Manual / Technical Bulletin ▷ View online
Sharp Electronics (UK) Limited
Reference AVW031299-2
Revision 2
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
CTV991207
Month of Issue: December 1999
Classification: White
TELEVISION TECHNICAL BULLETIN
Page 1 of 1
MODELS
DV5105H
DV5107H
DV5132H
SYMPTOM Intermittent operation leading to any of the following symptoms.
•
Set starts up then shuts down with the LED red
•
Set starts up then shuts down with the LED changing between red and green
•
Set shuts down intermittently, normally when there is high beam current
•
Intermittent start up - improves when warm
CAUSE R751, R777, D751, D700, C756 and/or R612.
ACTION The above faults are normally caused by R751 and R777 going high in resistance.
Both of these resistors are 0.33
Ω
and go high by a few hundred milliohms, as most
multimeters are unable to resolve resistances less than 1
Ω
it is advised to check by
subsitution.
In some cases, intermittent start up has been traced to D700 (HT rectifier), D751 (pre-
five volt rectifier) or C756 (smoothing capacitor). Once agian it is best to replace
these components if in doubt.
R612 is the supply feed resistor to the vertical stage. All sets should be modified so
that a 1.2
five volt rectifier) or C756 (smoothing capacitor). Once agian it is best to replace
these components if in doubt.
R612 is the supply feed resistor to the vertical stage. All sets should be modified so
that a 1.2
Ω
, 0.5W resistor is fitted in series with R612. To do this, replace wire link
J13 with the resistor.
Note that the HT supply should be 113VDC on a blue screen (pull the aerial out and
wait a few minutes - the blue screen will appear due to lack of line sync).
Note that the HT supply should be 113VDC on a blue screen (pull the aerial out and
wait a few minutes - the blue screen will appear due to lack of line sync).
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
R751
Resistor, 0.33R, 1W
VRN-VV3ABR33J
AB
R777
Resistor, 0.33R, 1W
VRN-VV3ABR33J
AB
D700
Diode
RH-DX0110CEZZ
AB
D751
Diode
RH-DX0226CEZZ
AC
C756
Capacitor 2200
µ
F, 25V
VCEAGH1EW228M
AE
R612
Resistor 2.2
Ω
, 0.5W
RR-XZ0204BMZZ
AA
J13
Resistor 1.2
Ω
, 0.5W
VRD-RA2HD1R2J
AA
Display
