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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: 178
Bush
WST Professional 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
Series
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
Series
Dead
R802 R803 ( 15K )
14-09-04
Decca
A
Series
Dead with squeal
Dry joints R808 ww resistor
14-09-04
Decca
A
Series
No remote operation
IR Rx faulty
14-09-04
Decca
A
Series
Varying HT
Dry joints R808 ww resistor
14-09-04
Decca
B
Series
Line whistle - mod reqd
Add 220pf cap to pin 5 & pin 6 of opto IC802 in psu
14-09-04
Decca
B
Series
Loses register 7 (line osc free run)
Dry joints 27Mhz Xtal on Txt pcb
14-09-04
Decca
B
Series
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
Series
childlock on
sw on tv whilst holding in 'P+' button on front
14-09-04
Decca
C
Series
Cuts out on high brightness scenes
HT volts drops in sympathy - CE803 220µ 16v ( supply to TDA4605)
14-09-04
Decca
C
Series
Field collapse
dry joint I402
14-09-04
Decca
C
Series
int trip - once or twice a day
worse when heated - - TDA4605 heat sensitive - u/s
14-09-04
Decca
C
Series
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
Series
No R/C operation
No o/p from r/c chip IC750 Replace TFMS4360N with TFMS5360
14-09-04
Decca
C
Series
St/by LED on - otherwise dead
Dry joint on end pin SCART skt depriving line feed to dr tfmr
14-09-04
Decca
C
Series
st/by only
HT (B+) present - on/off sw perm made - was faulty
14-09-04
Decca
C
Series
Stuck on Chan 1 & no analogue control (Child Lock)
Hold "Prog +" whilst switching on
14-09-04
Decca
D
Series
All red.
R012 100k on CRT base.
14-09-04
Decca
D
Series
Bright Green Raster
Green cathode volts low - Tr931 BC547 o/c & R932 100k hi res
14-09-04
Decca
D
Series
field collapse
R504 3M3 faulty - feeds ramp to pin 42 IC503 TDA8362
14-09-04
Decca
D
Series
Lack of height
Check 33v supply IC001 TAA550 & feed res R015/6 6k8 & R504 3M3
14-09-04
Decca
D
Series
Line foldover with crt heaters dimming
R427 line feed res high res
14-09-04
Decca
D
Series
No Field Scan
If IC401 & R414 are OK check R504 3M3 ohm
14-09-04
Decca
D
Series
Noisy Power Supply in Stand By
Change C806 to 2.2uF 50V
14-09-04
Decca
D
Series
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
Series
Improvement of AFC Pull in time and Inter-channel Mute
Change R001 to 18K & R003 to 27K
14-09-04
Decca
DBN9B52P B
Series
Ballooning pic
Dry joints line scan coill plug on main pcb
14-09-04
Decca
E
series
Dead
R423 in pri of line dr O/C - check Tr403 2SC1815Y
14-09-04
Decca
E
series
High HT
R834 75k hi res
14-09-04
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Last SM download : DENON PMA-710ae
script execution: 0.03 s