Sharp 37AT-25H (serv.man18) Service Manual / Technical Bulletin ▷ View online
Sharp Electronics (UK) Limited CE Technical Support Group
Originator
$Y:
Supervisor
Approval Date / / Reference GE62701X
White - Carry out as required Yellow - Carry out as required and whenever unit comes in for service Red - Carry out on all units
CTV970503
Month of Issue :
May 1997
Classification :
White
TELEVISION TECHNICAL BULLETIN
Page 1 of 1
MODELS
31AM12H
37AM23H
37AT25H
REASON
During manufacture of the above models, several different CRT's have been used.
ACTION
The original CRT fitted to these sets is the Philips type ( Part number
VB34EAC0136*N ) and the circuit details in the service manual apply.
VB34EAC0136*N ) and the circuit details in the service manual apply.
If a Samsung CRT is fitted then the following circuit change is made.
1. Fit location C602 with a 220pF, 2KV capacitor.
2. C606 is a 330nF, 250V.
4. R718 is a 8k2, 0.125W.
2. C606 is a 330nF, 250V.
4. R718 is a 8k2, 0.125W.
If an Orion CRT is fitted then the following circuit change is made.
1. Fit location C602 with a 1500pF, 2KV capacitor.
2. C606 is a 330nF, 250V
3. D612 is removed.
4. D613 is removed.
2. C606 is a 330nF, 250V
3. D612 is removed.
4. D613 is removed.
If a Changh-Wa CRT is fitted then no circuit changes are made.
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
V1
Philips CRT
VB34EAC0136*N
CB
V1
Samsung CRT
VB37GDA8601*N
CB
V1
Orion CRT
VB34JLL9057*N
CB
V1
Chungh-Wa CRT
VB370KRB2201N
CB
C602
Capacitor, 220pF 2KV
RC-KZ0035CEZZ
AC
C602
Capacitor, 1500pF 2KV
RC-KZ0057CEZZ
AD
C606
Capacitor, 330nf 250V
RC-FZ6334BMNJ
AE
R718
Resistor, 8k2, 0.125W
VRD-RA2BE822J
AA
Display
