| Make | Model | Problem | Solution | Date |
| | | |
| Found: 4551
|
| Philips | MD1.1E | Volume adjustment in only in 4 levels. | IC7353
(MSP3400; 4822 209 90562)
(MSP3410; 4822 209 90563) | 14-09-04 |
| Philips | MD1.1E | White bars in picture | Add 2K7 resistor to item 5421 (coil).
Service code number is 4822 117 11433.
REMARKS :Above mentioned modification is already implemented in sets with
QGxx9546 or higher. | 14-09-04 |
| Philips | MD1.1E | White measure line (monitor puls) in bottom part of picture. | Check/replace R3464 by 1 Ohm (4822 052 11108). | 14-09-04 |
| Philips | MD1.1E | Wrong colour and geometry. | Adjust geometry and alignment options in the Service Alignment Mode.
Replace EEPROM (IC7685; 24W04C1; 4822 209 90962) if necessary. | 14-09-04 |
| Philips | MD1.1E 25PT4521/25 | Dead after burning smell | Mains switch - seem to be a potential fire risk | 14-09-04 |
| Philips | MD1.2 | Audio missing except from headphones | Faulty Tr7601 sm transistor causing mute cct to operate | 14-09-04 |
| Philips | MD1.2 | Dead - held in prot mode with no line dr & low HT | Micro faulty, also EEPROM corrupt, POR Tr & 4v7 zener s/c, LOPTx faulty | 14-09-04 |
| Philips | MD1.2 | e/w bowing in 4:3 pic - double image & line tearing in Super Zoom - lopt whining | IC7119 on small sigs board - check for dry joints at connector S11 | 14-09-04 |
| Philips | MD1.2 | interference when disturbed | CTI panel dry joint edge conn | 14-09-04 |
| Philips | MD1.2 28PW6322 | Poor pic with fly back lines, R3329 on tube base getting hot. | CRT faulty | 14-09-04 |
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| Philips | MD1.2 E | red flyback lines ,visible in black parts | pcb under line transformer broken | 14-09-04 |
| Philips | MD1.2E | Bad focus or focus varies in a new set or after CRT replacement | Possible solution:
Short circuit the focus and the G2 pins of the picture tube with the
aquadag coating. Switch the set on for approximately 5 seconds.
After this return the set to its original condition. Check if the
focus adjusted normally. If not repla | 14-09-04 |
| Philips | MD1.2E | Bad start behaviour, ON and ST.BY LED flashing | Change mains input voltage by a variac. When start problem increases with an input voltage that is only about 10% below normal, check or replace the supply optocoupler. With a good optocoupler an avarage set easily starts on 60% of normal mains voltage. | 14-09-04 |
| Philips | MD1.2E | Blinking LED (set in protection) | Set in I2C software protection due to problems with the I2C communication.
Check pin 12 of connector I46 on the Audio Module (SCL line). Look for a badly soldered (oxidated) pin 12. Resolder pin 12 if required. | 14-09-04 |
| Philips | MD1.2E | Colour missing with playback of Secam tape | Check and replace if necessary item 7113 (TDA8395/N2) on the SSP by TDA8395/N3
(4822 209 16032).
REMARKS :This is a service solution that is not introduced in production. | 14-09-04 |
| Philips | MD1.2E | Colourspots on screen; degaussing defective | The circularly pattern consists of a red spot in the middle,
surrounded by a green circle, which again is surrounded by a blue circle.
This is caused by a defective position 7507 on the LSP.
Delete position 7507.
Mount jumper 9507 on the LSP | 14-09-04 |
| Philips | MD1.2E | Cracks in Nicam sound | Check and replace if necessary item R3002 by a 180 Ohm 1% 0.1W resistor (4822 117 11448). R3002 is located on the Nicam L panel.
For MD1.1E AA sets (not applicable for MD1.2E AA and MD1.1E AB) a micro controller that solves the "random change of volume" | 14-09-04 |
| Philips | MD1.2E | Dark picture / wrong colours | Check soldering of connector W57 (CTI/Black Stretch module)
Resolder all pins if required.
REMARKS :A solution is introduced in production from week 9801 onwards. | 14-09-04 |
| Philips | MD1.2E | Dead - blows several semis at sw on | bridge rect, H8NA60F, MC44603P 10R 0.22R, 220pf cap2kv, 3524 10R, 3525 180k, 6524 BYV10-20 (not 20v zener - fit proper replacement), BA157, STH8NA60FI, STW8NA60, CNX82A, check C2540 | 14-09-04 |
| Philips | MD1.2E | 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 | MD1.2E | Dead, FET7540 s/c & MC44603P changed - after replacement LED flashed red, yellow & green | LOPTx faulty tho' checks ok on tester | 14-09-04 |
| Philips | MD1.2E | Dead, no LEDs & burning smell | C2568 330nF 1kv s/c | 14-09-04 |
| Philips | MD1.2E | Easy way to check the Power Supply | Easy way to check the Power Supply----------------------------------
The MC44603 can be checked for basic operation without the set being connected to the Mains supply. Method:
1) Discharge the 300V smoothing Capacitor.
2) Connect a BYD33D Diode to p | 14-09-04 |
| Philips | MD1.2E | How to enable/disable "Child Lock" | Select "FEATURES" (this expression is language dependent) menu on Remote Control.
Within "FEATURES", the "CHILD LOCK" can be enabled or disabled. | 14-09-04 |
| Philips | MD1.2E | Interference in picture on 182, 217, 238 and 495 MHz | 1. Use high quality antenna cables and connectors (in case of insufficient result, apply solution 2)
2. Add 3 SMD capacitors (parallel) on pos 2391 audio-module.
470pF; 5322 122 32268
220pF; 4822 122 31173 and
1,5pf; 5322.126.10225
| 14-09-04 |
| Philips | MD1.2E | Interference on VHF3 (175-225MHz) | Use good (double screened) coax to and in the neighbourhood of the TV- set. Do not use open (unscreened) coax connectors. | 14-09-04 |
| Philips | MD1.2E | Intermittent no picture and/or sound | Check pin 12 of connector I46 on the Audio Module (SCL line). Look for a badly soldered (oxidated) pin 12. Resolder pin 12 if required. | 14-09-04 |
| Philips | MD1.2E | MD1.2E LOT SURVEY | MD1.2E LOT SURVEY
SET TYPE SERVICE CODE NUMBER REMARK
20" WIDESCREEN 4822 146 10367
21" BM 4822 140 10595 *)
24" WIDESCREEN 4822 140 10584
25" SF " | 14-09-04 |
| Philips | MD1.2E | Moire in picture on certain channels (Ch6, Ch11, Ch24 and S12) | Depending on the severity of the problem, a 3 phase solution is available.
If the problem is not sufficiently solved by step 1, continue with 2, etc.
1. Use a high quality antenna cable
2. Add 3 SMD capacitors (in parallel) on position 2391 (Audio Mo | 14-09-04 |
| Philips | MD1.2E | New lay-out of CRT panels | New lay-out of CRT panels
Only for: All 25 (EXC. TESLA), 28 (EXC. WS) AND 29 (WITHOUT SCAVEM)
For the following MD1.2E sets, a new CRT lay-out is used:
SERVICE CODE
CRT type | 14-09-04 |