| Make | Model | Problem | Solution | Date |
| | | |
| Found: 74
|
| 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 |
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|
| 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 |
| Philips | MD1.2E | No colour or no colour after some time | Check C2161 (via 3164 on pin 34 IC7119/TDA8366) whether voltage on pt 34 is much lower than 4.5V. Probably C2161 has leakage.
Codenumber C2161 (100 nF 10% 125V) is 4822 126 13161. | 14-09-04 |
| Philips | MD1.2E | No line drive. | Check R3415 5K6 5W (4822 117 12517 Line drive stage)
| 14-09-04 |
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| Philips | MD1.2E | no luminance, no remote, no OSD | sandcastle pulse from 16:9 PCB distorted corrupting I2C bus, replace SMD Tr7420 BC848B on 16:9 PCB | 14-09-04 |
| Philips | MD1.2E | No or slow reaction to RC / Not to standby | Slow response due to problems with I2C communication.
Check pin 12 of connector I46 on the Audio Module (SCL line). Look fo a badly soldered (oxidated) pin 12. Resolder pin 12 if required. | 14-09-04 |
| Philips | MD1.2E | No picture. Sound OK. > 1V on blanking pin24 TDA8366 | Check T7683 (BC858B)
| 14-09-04 |
| Philips | MD1.2E | No picture; sound OK | Check IC7119: output pins 17/18/19/25
Replace if necessary IC7119 (TDA8366/N4; 4822 209 14927) | 14-09-04 |
| Philips | MD1.2E | No TXT. No wide screen. All options are "N". | Check memory IC pos 7685.
| 14-09-04 |
| Philips | MD1.2E | Noise from power supply transformer | Remove C2567 (680pF capacitor) on the Large Signal Panel.
C2567 is located parallel to D6567.
REMARKS :Item C2567 is only present in sets produced after wk9719.
The problem only occurs in sets produced after wk9719 with SMPS transformers (ite | 14-09-04 |
| Philips | MD1.2E | Noise in one channel / STEREO detection of MONO transmission | This problem can be solved with a new mask version of the MSP3400 IC in combination with a new 18.432MHz crystal (items IC7353 and X1350 on the Audio Module).
Check and replace if necessary by the new components:
item 1350 18.432MHz (Kinseki) crystal | 14-09-04 |
| Philips | MD1.2E | Not possible to switch set to standby | Check whether R3588 (LSP) is open.
IF R3588 is open than:
1. Replace R3588 (4822 052 11338; 3.3ohm 5% 0.5W)
2. CHANGE C2561 on the LSP to 3300uF 16V 20% (4822 124 40784). | 14-09-04 |