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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: 210
Bush
2872NTX 11AK19
ES
Dead - LED flickers low green
No 5v supply as R867 0R33 o/c
14-09-04
Bush
6690 V
es
tec
No vol/chan change or menu functions in analogue functions. Digi tuner works OK
Reset remote handset by pressing Left/Right/ Down cursor keys & No 1 button together and holding for 5 secs. Note if fault does not clear suspect micro IC.
14-09-04
Bush
WST Prof
es
sional 4400 series
Service Mode access
hold menu button while turning CTV on until the red LED lights up. Release the menu button and press standby.
14-09-04
Decca
C Seri
es
Volume won't Adj over full range or no front Panel Op.
For volume - press --/- on remote , Vol + on set , --/- on remote for no front panel , Switch set off , Press & hold P+ on S
14-09-04
Decca
A Seri
es
Dead
R802 R803 ( 15K )
14-09-04
Decca
A Seri
es
Dead with squeal
Dry joints R808 ww resistor
14-09-04
Decca
A Seri
es
No remote operation
IR Rx faulty
14-09-04
Decca
A Seri
es
Varying HT
Dry joints R808 ww resistor
14-09-04
Decca
B Seri
es
Line whistle - mod reqd
Add 220pf cap to pin 5 & pin 6 of opto IC802 in psu
14-09-04
Decca
B Seri
es
Loses register 7 (line osc free run)
Dry joints 27Mhz Xtal on Txt pcb
14-09-04
Decca
B Seri
es
To enter electronic screwdriver settings
Move jumper link by proc to other posn. No. in lh of screen is parameter & can be stepped thro' in Hex from 00 to 12 using "3" button (up) & "2" button (down). Parameters changed by using "Balance left & right"
14-09-04
Decca
C Seri
es
childlock on
sw on tv whilst holding in 'P+' button on front
14-09-04
Decca
C Seri
es
Cuts out on high brightness scenes
HT volts drops in sympathy - CE803 220µ 16v ( supply to TDA4605)
14-09-04
Decca
C Seri
es
Field collapse
dry joint I402
14-09-04
Decca
C Seri
es
int trip - once or twice a day
worse when heated - - TDA4605 heat sensitive - u/s
14-09-04
Decca
C Seri
es
Line down pic when cold (folded scan)
R413 18R ?w hi res - check HT correct -115v 14/20"; 109.5v 15/21"
14-09-04
Decca
C Seri
es
No R/C operation
No o/p from r/c chip IC750 Replace TFMS4360N with TFMS5360
14-09-04
Decca
C Seri
es
St/by LED on - otherwise dead
Dry joint on end pin SCART skt depriving line feed to dr tfmr
14-09-04
Decca
C Seri
es
st/by only
HT (B+) present - on/off sw perm made - was faulty
14-09-04
Decca
C Seri
es
Stuck on Chan 1 & no analogue control (Child Lock)
Hold "Prog +" whilst switching on
14-09-04
Decca
D Seri
es
All red.
R012 100k on CRT base.
14-09-04
Decca
D Seri
es
Bright Green Raster
Green cathode volts low - Tr931 BC547 o/c & R932 100k hi res
14-09-04
Decca
D Seri
es
field collapse
R504 3M3 faulty - feeds ramp to pin 42 IC503 TDA8362
14-09-04
Decca
D Seri
es
Lack of height
Check 33v supply IC001 TAA550 & feed res R015/6 6k8 & R504 3M3
14-09-04
Decca
D Seri
es
Line foldover with crt heaters dimming
R427 line feed res high res
14-09-04
Decca
D Seri
es
No Field Scan
If IC401 & R414 are OK check R504 3M3 ohm
14-09-04
Decca
D Seri
es
Noisy Power Supply in Stand By
Change C806 to 2.2uF 50V
14-09-04
Decca
D Seri
es
Tuning proc
press 'filled square' button, press '4', search up with '4', down with '4&3'. Press '5' to store chan, press'6' to exit set up
14-09-04
Decca
D Seri
es
Improvement of AFC Pull in time and Inter-channel Mute
Change R001 to 18K & R003 to 27K
14-09-04
Decca
DBN9B52P B Seri
es
Ballooning pic
Dry joints line scan coill plug on main pcb
14-09-04
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