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Electronic appliance repair tips database - TV (LCD,TFT,Plasma,Digital), Monitor, VCR, DVD recorder and player, Digital camera, Audio equipment, Microwave ovens, Phone systems, Computer repair
Make
Model
Problem
Solution
Date
Found: 442
Decca
170
No sound or raster - display Ok - no 12v rail
Drys on pins 1&15 of M152 connector ( audio/scart pcb ) must remove.
14-09-04
Decca
170
No sound/led & bright raster fading away
6v supply only 2.2v - D811 BA157 leaky
14-09-04
Decca
170
No sound/vis - has chan display & will change chan - HT present at lop tr
Dry joints on plug pins base of vertical scart panel & on RA16 on separate audio panel.
14-09-04
Decca
170
No start up - chan ind ok
R426/427 1k hi res
14-09-04
Decca
170
NO TUNING FROM COLD , OK WHEN WARM
4Mhz CRYSTAL X001
14-09-04
Decca
170
No tuning when cold
33v ok at pin 17 SAB3035 but no o/p pin 15 - X001 4Mhz Xtal faulty
14-09-04
Decca
170
NON STARTER , CHAN IND LIGHTS , CAN BE SWITCHED TO S
CHECK LINE DRIVER STAGE ESP. R426 AND R427 BOTH 1K ohm
14-09-04
Decca
170
Only possible to select one channel.
Front panel membrane , or IC702 ( CITAC )
14-09-04
Decca
170
Pale picture - lack of contrast - control u/s
L506 o/c.
14-09-04
Decca
170
Sound - none LED 1/2 inch bright band at top.
D811 ( BA157 ) high forward resistance , R820 ( 0.22R )
14-09-04
Decca
170
Switching on from standby.
IC702 or Front panel control membrane.
14-09-04
Decca
170/180
Dist col - yellow faces - int
C531 1µ 50v in apc loop
14-09-04
Decca
170/180
Line o/p tr s/c
Also replace D404 BY228 E-W mod diode, Q303 (TIP31 ok) & R433 1R2 safety res
14-09-04
Decca
170/80
INT YELLOW FACES AFTER 2hrs
C531 1uF 50v DECODER
14-09-04
Decca
171
Line collapse.
Drys on Lin coil.
14-09-04
Decca
171
Line collapse.
Drys on Lin coil.
14-09-04
Decca
171
No sound.
Drys on sound IC.
14-09-04
Decca
171
No sound.
Drys on sound IC.
14-09-04
Decca
171
No Tuning - will sweep.
R004 ( 4.7R ) side of tuner.
14-09-04
Decca
180
Blowing Q403 S2000AF.
C421 o/c ( value depends on CRT size.
14-09-04
Decca
180
Brighter at rh side of screen
Check C426 & C508 0µ1
14-09-04
Decca
180
Chan display only
HT at lop tr - no 18v pin 15 AV plug (M00-1) 26v ok at pin 1 caused by burnt skt pin 15 - hard wired
14-09-04
Decca
180
Chan display only - no 18v to reg
Bad joints pin 15 scart conn
14-09-04
Decca
180
Dead - chopper tr s/c
Check 120 & 150k feedback Rs & 220R res next to chopper tr
14-09-04
Decca
180
Green tint to picture.
R212 ( 47k ) high.
14-09-04
Decca
180
instantly blows S2000AF lop tr Q403
C433 6.8nf 2kv in e-w cct o/c
14-09-04
Decca
180
Int frame collapse - destroys TDA3651.
C306 ( 100uf 50v ) o/c.
14-09-04
Decca
180
Low contrast
120k res under lopt
14-09-04
Decca
180
NO SOUND OR PIC LED LIT
IC1001 SAB3035
14-09-04
Decca
180
No sound or raster - display Ok - no 12v rail
Drys on pins 1&15 of M152 connector ( audio/scart pcb ) must remove.
14-09-04
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