37GT-27H (serv.man13). Troubleshooting tables - Sharp TV Service Manual (repair manual)

37gt-27h (serv.man13) service manual
Model
37GT-27H (serv.man13)
Pages
5 Few pages! See other manuals at the bottom of the first or last page.
Size
34.43 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / CTR / Troubleshooting tables
File
37gt-27h-sm13.pdf
Date

Read Sharp 37GT-27H (serv.man13) Service Manual online

32
37GT-27H
NO PICTURE
NO
Check Q1001, 
IC1001, IC1003
Check the tuner supply 
and band biases. Both
 must be approx. 5V DC
Normal
YES
Is tuning voltage 
normal at  
Pin (2) of Tuner? 
Check Picture 
setting by R/C. Signal 
should be received.
-Check the AGC Voltage:
 Pin (1) of Tuner.
-Check the SAW Filter: SF201
TROUBLESHOOTING TABLES.
33
37GT-27H
NO SOUND
Check Sound setting by
R/C. Signal should be
received.
NO
YES
Check D707, C710
NO
Is
Audio Amplifier
muted?
Check R304, Q301, Q302
NO
Check IC801, C301
YES
YES
Check IC1001, Q305
Does 
Sound Signal
 appear at Pin(6) 
of IC801?
Does 
approx. 20V DC 
appear on 
C710?
34
37GT-27H
NO RASTER
Check F701
Normal
Fuse Blown
Normal
Replace Fuse
Fuse Blown
 again
Check IC701
Normal
Abnormal
Check Q601, 
C711
Check D708, D717
Normal
Check R705, R706,
R715, D706
Normal
Check CRT connector
K1... K5 bias
Normal
Abnormal
Check C878
Check IC801
Check Q601, C711
Check Voltage on C705
(Approx. 325V DC)
Check D701, D702, D703,
D704, C705.
Check Voltage on C711
(Approx. 105V DC)
Approx. 0V
35
37GT-27H
NO VERTICAL SCAN
YES
NO
 Check  D709, D710, IC501
DEFECTIVE VERTICAL AMP.
AND VERTICAL LINEARITY
Readjust Vertical Size.
   
Check D505, D506
Check Q505, Q507, Q509
NEITHER VERTICAL NOR
HORIZONTAL SYNCHRONIZATION
Check IC801, C815, C816, R818
Vertical size is abnormal
Vertical linearity is abnormal
Is IC501
bias normal? 
Check R510, Q501,
Q502, Q503
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Here you can read online and download Sharp 37GT-27H (serv.man13) Service Manual in PDF. 37GT-27H (serv.man13) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp 37GT-27H (serv.man13) CTR. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.