| Make | Model | Problem | Solution | Date |
| | | |
| Found: 4551
|
| Philips | MD2.25 | No sound - fault in separate sound psu | Tr7302 BU508AF s/c, R3300 6R8 o/c s/c on 16v line traced to AF o/p ic 7740 s/c | 14-09-04 |
| Philips | MD2.25 | dead - mains switch faulty | replace switch with improved type (coloured black). Use old part no, Philips will supply a new type | 14-09-04 |
| Philips | MD2.25 29PT8413 | Trips int leaving no sound/pic & st/by LED flashing cont. | due to oxidised connections on the audio board pins - looked ok but resoldering cured | 14-09-04 |
| Philips | MD2.25 32PW9523 | excessive width with E/W | IC7480 (482213011336) EW chip | 14-09-04 |
| Philips | MD2.25 32PW9523/25 | Width shrinks & reverts to st/by on bright scenes | Current sense resistors R3546, R3547 0R39 in PSU had gone slightly high in value | 14-09-04 |
| Philips | MD2.25E | Codenumber information | Codenumber information
----------------------
Long cable SSP <> CRT panel: 4822 320 11291.
Set extention cables: 4822 310 11188.
The extention cables are different from MD2.22E because use of other
connectors.
| 14-09-04 |
| Philips | MD2.25E | Correction to position 21 of styling 220 | Correction to position 21 of styling 220 of Product Survey 1999-3 (3122
785 10300
The code numbers mentioned for the aluminium columns at position 21 of
styling 220 are not correct. The correct code numbers must be:
21 4822 466 12216 Aluminium colum | 14-09-04 |
| Philips | MD2.25E | Crackling noise coming from the picture tube | Crackling noise coming from the picture tube during light/dark changes of the picture contents.
Mount bleeder (4822 310 11113) between LOT and picture tube.
If problem still exist Anti Crackling Coating (ACC) can be applied.
The code number for this AC | 14-09-04 |
| Philips | MD2.25E | Curtain effect just after a white vertical line (ringing phenomenon) | To reduce the ringing phenomenon change the following positions on the Small Signal Panel:
Position 4508 into 1k (4822 051 10102)
Position 3537 into 1k (5322 117 12487)
Position 3538 into 1k (5322 117 12487)
Position 3565 into 1k (4822 051 10102)
Po | 14-09-04 |
| Philips | MD2.25E | E/W distortion and then switching to standby | Check and replace if necessary position 7480 on the Large Signal Panel
with IRF620FI (4822 130 63546).
REMARKS :
Introduced in production (25" and 29") in week 9912.
IRIS symptom code: 233A
| 14-09-04 |
|
|
| Philips | MD2.25E | Influence from wireless dolby on channel 3 | Cause:
The wireless dolby transmitter influences the 55.25 MHz on channel 3.
The local oscillator from the tuner interferes with the wireless dolby
transmitter frequency and this results in a cross pattern on channel 3
(55.25 MHz).
Solution:
- Add on pos | 14-09-04 |
| Philips | MD2.25E | No sound from left, right, centre and subwoofer speakers | Check on audio supply panel (AB, page 39)
7302, BU508AF, 4822 130 61265
3300, 6E8 5W, 4822 117 12681
If one or both are defective also check production code on transformer
5305.
If production code on 5305 is between or equal to OP9802 and OP9824
then al | 14-09-04 |
| Philips | MD2.25E | Noise (humming or low frequency whistle) coming from the picture tube | Mount bleeder (4822 310 11113) between LOT and picture tube.
If problem still exist Anti Crackling Coating (ACC) can be applied.
The code number for this ACC is 4822 390 10166.
The ACC is supplied with complete instructions how to apply.
REMARKS | 14-09-04 |
| Philips | MD2.25E 32PW9543/05 | Poor definition | Tr7140 BD140 on crt base s/c | 14-09-04 |
| Philips | MG1.1 28PW6615 | At sw on st/by LED lights then goes amber & starts to flash - in prot mode | St/by relay 4822 280 10375. this is listed as 1P 5V 10A JW1AFSN | 14-09-04 |
| Philips | MG1.1E 28PW6615C | poor audio level from rear speakers in dolby mode | remove SMD resistor R3735 located on copper side of LHS of the large signal panel | 14-09-04 |
| Philips | MG1.1EAA 32PW6615/025 | Int start up with LED flashing | relay 1002 in psu pt no 2422 1320 7405 | 14-09-04 |
| Philips | MG2.1E 28PW9515/05 | Dead with LOPTr s/c - BU2520DF | For reliability do following mod - remove C2411, change C2413 to 10µ 100v, R3406 to 100R to alter line dr coupling from ac to dc | 14-09-04 |
| Philips | MG2.1E 32PW9523/05M | Starts up, relays click then shuts down with LEDs flashing | Check relay 1010 - conducts only briefly at sw on in this case | 14-09-04 |
| Philips | MG3.1EAA 28PW9525/05 | Sound dist/fuzzy | Hi imp center speaker | 14-09-04 |
| Philips | MID2.25 29PT8413/25 | No off air sigs - just blue screen | Tuner faulty - replace top one of 3 x BF909R (marked M29) 4 legged SM Tr | 14-09-04 |
| Philips | Midi 1.1 | Dead - tripping with Eht briefly present | Tr 7450 BC558 in prot cct | 14-09-04 |
| Philips | Midi 1.1 | No pic sound ok | Check fuse 1463 630mA; tesla module 4822 212 32363; Tr 7400 BC327 diode 6400 1N4148 | 14-09-04 |
| Philips | NC3 | Black raster - sound & OSG Ok. | IC TDA3565 | 14-09-04 |
| Philips | NC3 | Blank raster - sound ok | TDA3565 col dec chip | 14-09-04 |
| Philips | NC3 | Bright Raster with fb lines - sound ok | TDA4505 faulty | 14-09-04 |
| Philips | NC3 | Chopper tr blows at sw on | R418 o/c & check for dry joints in chopper & LOP ccts & R407 560k | 14-09-04 |
| Philips | NC3 | CHOPPER TR SC | CHECK R407 560k | 14-09-04 |
| Philips | NC3 | Dead | o/c mains sw - used Grundig type | 14-09-04 |
| Philips | NC3 | Dead | chopper tr s/c dry joints T402 | 14-09-04 |