| Make | Model | Problem | Solution | Date |
| | | |
| Found: 4551
|
| 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 |
| 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 |
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| Philips | MD1.2E | Red horizontal line visible in the upper part of the screen | This problem can be solved by introducing the following modifications:
- add position C2472 (4,7uF 100V; 4822 124 40769)
- add position R3444 (1kohm; 4822 050 11002)
- replace position R3601 by 6,8 ohm (4822 050 26808)
- add position D6428 (BYD33D; 48 | 14-09-04 |
| Philips | MD1.2E | Red picture (no luminance; only chrominance) | Check and replace if necessary IC7119 (TDA8366/N4; 4822 209 14927) on the SSP. | 14-09-04 |
| Philips | MD1.2E | Service Manual | Service Manual
All sets with chassis name MD1.1E AB are electrically identical to MD1.2E AA sets with a 30K micro processor.
Therefore there is no seperate MD1.1E AB documentation. The Service Manual MD1.2E AA can be used. The codenumbers are:
SERV | 14-09-04 |
| Philips | MD1.2E | Set goes in "autozap", using VCR remote | Autozap starts when P+ or P- is pressed for a few seconds.
This can occur when a customer wants to adjust a timerblock in the VCR.
Solution: This is solved in new software M12CO1-5.4, codenumber 4822 900 11237.
Before changing the software write down | 14-09-04 |
| Philips | MD1.2E | Set in protection after LOT replacement | After replacing the LOT during a repair, the set still does not work and goes to (BC) protection (LED blinks).
Check and replace if necessary in the EHT-info circuit:
On the Large signal panel (A2):
R3452, R3465 and C2450
On the Small signal pan | 14-09-04 |
| Philips | MD1.2E | Set in protection with several error codes in the error buffer | Errors caused by intermittent I2C communication problems. Usually one of the error codes is related to the MSP34x0 sound processor.
Check pin 12 of connector I46 on the Audio Module (SCL line). Look for a badly soldered (oxidated) pin 12. Resolder pin 1 | 14-09-04 |
| Philips | MD1.2E | Set is switching off for a short time. Options are all "N". | Check processor pos 7600.
| 14-09-04 |
| Philips | MD1.2E | Set switches to HALL audio mode by itself | Only for sets with typenumber XXPXXX12 or XPXXX32
--------------------------------------------------
Check in the Service Alignment Mode if the micro controller version is:
M12DO1-1.0, M12DO2-1.0, M12DO1-1.1, M12DO2-1.1, M12DO1-1.3 or M12DO2-1.3
In t | 14-09-04 |
| Philips | MD1.2E | Set total inoperative (no LEDs) | Check and replace X1651 (crystal of uP) on the SSP.
Code number: 4822 242 81946 | 14-09-04 |
| Philips | MD1.2E | Set totally inoperative. Crackling sound out of set. Supply hickuping | Check L.O.T. pos 5430 and D6463/F1463/T7760
| 14-09-04 |
| Philips | MD1.2E | Set totally inoperative. Supply is hickupping. | Check D6423 in line circuit.
| 14-09-04 |
| Philips | MD1.2E | Set up mode entering | s/c the 2 pins centre of small sigs panel | 14-09-04 |
| Philips | MD1.2E | Sometimes no colour when set is switched on | Check capacitor C2143 (100nF)
| 14-09-04 |
| Philips | MD1.2E | Sound absent | No 30v to sound o/p chip - IC7761 TDA2626QN1 & 1572 2.5A wickman fuse off pin 13 chopper tfmr | 14-09-04 |
| Philips | MD1.2E | Supply goes in protection during start-up | Change item C2137 on the Small Signal Panel to: 2.2uF (10V) capacitor 5322 126 14103 | 14-09-04 |
| Philips | MD1.2E | SURVEY OF DFU SERVICE CODE NUMBERS | SURVEY OF DFU SERVICE CODE NUMBERS
* only for sets with 60K uP (TMP87PM38N) *
SET TYPE LANGUAGES BRAND SERVICE CODE NUMBER
4:3 & 16:9 FR-NL-DU-IT PHILIPS 4822 736 14982
4:3 & 16:9 FR-NL- | 14-09-04 |
| Philips | MD1.2E | The bottom left side of picture shows a green teletext symbol | The bottom left side of picture shows a green teletext symbol whether or not the teletext is switched on.
Subtitling is selected, but the subtitling page is not stored.
Switch off the subtitle function by pressing the subtitle knob on the remote cont | 14-09-04 |
| Philips | MD1.2E | UPDATE STYLING 148 PRODUCT SURVEY | UPDATE STYLING 148 PRODUCT SURVEY
Item nr Service Code Description
12 4822 320 12377 EHT cable
acef 4822 157 71539 Degaussing coil 25" (not in drawing)
bdg 4822 157 71529 Degaussing coil 29" (not in drawing)
set div | 14-09-04 |
| Philips | MD1.2E | Various faults (usually no picture). | Suction pad of the HT cable turned inside out.
Check and replace if necessary (if defective):
IC7119 - TDA8366 - on SSP 4822 209 14927
IC7113 - TDA8395 on SSP 4822 209 90129
T7366 on CRT panel 5322 130 41982
T7420 on 16/9 pan | 14-09-04 |
| Philips | MD1.2E | Vertical amplitude of picture is too high | Change item C2137 on the Small Signal Panel to: 2.2uF (10V) capacitor 5322 126 14103 | 14-09-04 |