Philips Repair Tips

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Make	Model	Symptom	Problem
PHILIPS	MD1.2E	Set is switching off for a short time. options are all "n".	Check processor pos 7600.
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
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
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
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
PHILIPS	MD1.2E	Red picture (no luminance; only chrominance)	Check and replace if necessary ic7119 (tda8366/n4; 4822 209 14927) on the ssp.
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 (1kΩ; 4822 050 11002) - replace position r3601 by 6,8Ω (4822 050 26808) - add position d6428 (byd33d; 48
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; 3.3Ω 5% 0.5w) 2. change c2561 on the lsp to 3300uf 16v 20% (4822 124 40784).
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
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
PHILIPS	MD1.2E	No txt. no wide screen. all options are "n".	Check memory ic pos 7685.
PHILIPS	MD1.2E	No picture; sound ok	Check ic7119: output pins 17/18/19/25 replace if necessary ic7119 (tda8366/n4; 4822 209 14927)
PHILIPS	MD1.2E	No picture. sound ok. > 1v on blanking pin24 tda8366	Check t7683 (bc858b)
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.
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
PHILIPS	MD1.2E	No line drive.	Check r3415 5k6 5w (4822 117 12517 line drive stage)
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.
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
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
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 "