Symptom TV set cannot power up or has no backlight. Cure Replace PSU/IPB to a higher version number (MPR0.2) that is produced from week 009.3 onwards (see figure 1 for the production week code). The 12NC order codes are as given below (#): 272217190103 (32 PLHL-T807A-MPR0.2) - 32PFL5404H/12_1 (*) - 32PFL3904H/12_1 272217190104 (32 PLHL-T808A-MPR0.2) Note: for this PSU, please first refer to (attached) SCC_86941 "TV set cannot power up/start-up", to check transformer T701. - 32PFL5604H/12_2 - 32PFL5604H/12_4 - 32PFL5624H/12_2 - 32PFL5624H/12_4 It is a solution for you :) Regards
SCC_86941
Repair Instruction for No power/TV not able to start-up symptoms
Failure Symptoms:
1. No power.
2. TV not able to start-up.
Is failure due to
power supply?
Proceed with
normal repair
No
Yes
End
Measure transformer T701.
(refer to procedure Step 1)
Swap new IPB
Is transformer
T701 defective?
No
(that is produced from
wk 009.3 onwards,
refer to SCC_78782)
Yes
Replace Transformer T701
(refer to procedure Step 2 - 3)
Power “on” and burn-in for 2
hours at room temperature
with closed cabinet
End
Doc. Version: 1.0
Date: 29-JUN-‘11
SCC_86941
Repair instruction for Power Supply
Affected sets:
CTN
32PFL5604H/12_2
32PFL5604H/12_4
32PFL5624H/12_2
32PFL5624H/12_4
Chassis
Q543.3E LA
Only applicable to these power supply modules:
IPB Model No
32 PLHL-T807A-MPR0.2
IPB 12NC
272217190104
Components location and order code
Location
T701
Component Description
TRANSFORMER T808A
Doc. Version: 1.0
Supplier Part No
2130KP0352A-F
Philips 12NC
996510045987
Date: 29-JUN-‘11
SCC_86941
Component checking and repair procedure:
Fig.1 Location of Transformer T701
STEPS:
1. Measure transformer T701 to confirm if it is defective.
Equipment: HIOKI 3522-50 LCR HiTESTER (or equivalent)
Setting:
- Frequency: DC, 10kHz
- Voltage: 1V
a. Measure the resistance (R) between pin 4 and 5 of T701 (Fig.2). If measured R is & gt; 1 kohm = Not OK.
Fig.2 Pins Location
b. Measure the resistance (R) between pin 6 and 7 of T701 (Fig.2). If measured R is & gt; 1 kohm = Not OK.
Doc. Version: 1.0
Date: 29-JUN-‘11
SCC_86941
2. Replace transformer T701. Refer to Fig. 3 for the replacement flow.
Fig.3 Transformer T701 replacement flow.
3. Perform the following check after replacing the components.
a. Visual inspection.
Check if the transformer is fully inserted and properly soldered (Fig.4)
Fig. 4 After transformer T701 replacement.
b. Perform the following measurement:
Measure the resistance (R) between pin 4 and 5 of T701 (Fig.2). If measured R is & lt; 1 kohm = OK.
Measure the resistance (R) between pin 6 and 7 of T701 (Fig.2). If measured R is & lt; 1 kohm = OK.
BURN IN TEST AFTER REPAIR:
Please power “on” the TV, switch to any valid channel, and playback for 2 hrs (at room temperature and
closed cabinet) before returning the TV to the customer.
Doc. Version: 1.0
Date: 29-JUN-‘11