| Make | Model | Problem | Solution | Date |
| | | |
| Found: 442
|
| Decca | E series | High HT | R834 75k hi res | 14-09-04 |
| Decca | E Series | Hotel mode enable/disable | To disable the Hotel mode:
1. Press and release a Volume button
2. While the barograph is still displayed, press the MUTE button on R/C
To activate the Hotel mode:
1. Set the desired max. volume
2. While the barograph is still displayed, press the MUTE button | 14-09-04 |
| Decca | E Series | Loss of Video possibly intermittant | Check/Replace XL301 , R308 , IC302 | 14-09-04 |
| Decca | E series | No pic - heaters low or out | R940 4R7 ?w fusible hi res - also check R901 22R ?w fusible in A1 cct | 14-09-04 |
| Decca | E Series | No pic with field collapse | Replace C805 1000 uF 2.2 ohm safety res ( 45 volts to frame ) & TDA8350Q ALSO CHECK R814 75 k ohm in series with set HT pot gone high allowing HT to rise from 150 to 178 volts | 14-09-04 |
| Decca | E Series | Picture width reduction - 150V varying | Check C822 ( may change in value when warm ) | 14-09-04 |
| Decca | E Series | Service mode settings - Remove sk702 link (On LHS of Micro IC701 )
& use vol +&- to select & brightnes +&- to adjust |
00 source select do not adjust
01 90 system options reset to D0
02 20 Hue not used do not adjust
03 0E Hor Shift must be less than 40
05 36 E.W.Par must be less than 40
06 2D E.W. Corner must be less than 40
07 14 E.W. Trapez must be less than 40
08 20 vert slope must be less than 40
09 16 vert amp must be less than 40
0A 5C vert "S" cor must be reset between 80&BF
0B 1B Vert shift must be less than 40
0C 2A red drive must be less than 40
0D 2A green drive must be less than 40
0E AA blue drive must be between 80&BF
0F 57 peaking reset to 1A
10 5F brightness must be between 40&7F
11 A0 Saturation must be between 80&BF
12 1F Contrast must be less than 40
13 03 AGC must be less than 40
Store settings with Sound Mute Button | 14-09-04 |
| Decca | E series | St/by only - no line drive | 150v HT & LT present - line dr tfmr T401 sec o/c - was able to repair | 14-09-04 |
| Decca | E series D28NEE5 | Audio gives 3 pops when turned off from st/by Attempting to start from residual charge | Remove R803 & 804 47k from pcb & connect together in R804 posn. Fit wire on copper side of pcb (?) - Official mod from Decca but not explained very well. | 14-09-04 |
| Decca | E series D28NEE5 | Brightness fluctuates rapidly with poss fb lines | C527 100n next to IC501 faulty | 14-09-04 |
|
|
| Decca | E series D28NEE5 | Dead when cold - ok when heated | 5v rail low - IC804 5v reg | 14-09-04 |
| Decca | E series D28NEE5 | E/W poor & Width excessive after FOP repair | ZD409 33v zener leaky - not shown on cct diag - pin 11 IC401 to earth | 14-09-04 |
| Decca | E series D28NEE5 | Excess width/lack of height - int cuts out when heated | HT high at 177v (150v), R814 75k in HT pot divider | 14-09-04 |
| Decca | E series D28NEE5 | Field collapse | R422 1R2 fusible o/c off pin 6 LOPTx | 14-09-04 |
| Decca | E series D28NEE5 | Field foldover with lines at top | R437 1R2 o/c | 14-09-04 |
| Decca | E series D28NEE5 | | | 14-09-04 |
| Decca | F seies D20TFG5 | St/by LED flashes 4 times constantly | R417 burnt - 1K 1/4 watt (by LOPTx) C411 o/c 0.56uF 250v | 14-09-04 |
| Decca | F series | No signals when aerial lead flexed | Resolder dry joints on 5 volt regulator (I403) | 14-09-04 |
| Decca | F series | Switches to st/by with led giving 4 flashes aft 20 secs | R909, R913 & R922 180k on crt panel. Also check D910/901 in beam lim also on crt base | 14-09-04 |
| Decca | F Series D20TFG5 | Dead - PSU repair kit available part no 98-1313-6
| Q801 IRF1830G, Q404 BUT11AX, Q403 2SD468C, D801 DB107G, D805 130V 5W Zener, I402 opto Coupler, C412 1U63V, R814 0R39, R816 0R22, R802 10R, R812 330R | 14-09-04 |
| Decca | G series | Int col drop out - esp when playing tapes | Add 2x 8.2 pf 50v capacitors connected from the pins of crystal X501 to the ground end of C515. | 14-09-04 |
| Decca | MK3 | Sound - low & distorted. | OR71 ( 820 ) | 14-09-04 |