Philips TE1.1E, Service Manual

Safety & Maintenance Instructions, Warnings, and Notes

EN 3

TE1.1E

2.

2.

Safety & Maintenance Instructions, Warnings, and Notes

Index of this chapter:
1.

Safety Instructions for Repairs

2.

Maintenance Instructions

3.

Warnings

4.

Notes 

2.1

Safety Instructions for Repairs

Safety regulations require that during a repair:
•

Due to the 'hot' parts of this chassis, the set must be 
connected to the AC power via an isolation transformer.

•

Safety components, indicated by the symbol 



, should be 

replaced by components identical to the original ones.

•

When replacing the CRT, safety goggles must be worn.

 
Safety regulations require that after a repair, the set must be 
returned in its original condition. Pay particular attention to the 
following points:
•

General repair instruction: as a strict precaution, we advise 
you to resolder the solder connections through which the 
horizontal deflection current is flowing, in particular:
–

all pins of the line output transformer (LOT)

–

fly-back capacitor(s)

–

S-correction capacitor(s)

–

line output transistor

–

pins of the connector with wires to the deflection coil

–

other components through which the deflection current 
flows.

Note: This resoldering is advised to prevent bad connections 
due to metal fatigue in solder connections and is therefore only 
necessary for television sets more than two years old.
•

Route the wire trees and EHT cable correctly and secure 
them with the mounted cable clamps.

•

Check the insulation of the AC power cord for external 
damage.

•

Check the strain relief of the AC power cord for proper 
function, to prevent the cord from touching the CRT, hot 
components, or heat sinks.

•

Check the electrical DC resistance between the AC plug 
and the secondary side (only for sets that have an isolated 
power supply). Do this as follows:
1.

Unplug the AC power cord and connect a wire between 
the two pins of the AC plug.

2.

Turn on the main power switch (keep the AC power 
cord unplugged!).

3.

Measure the resistance value between the pins of the 
AC plug and the metal shielding of the tuner or the 
aerial connection of the set. The reading should be 
between 4.5 MOhm and 12 MOhm.

4.

Switch the TV 'off' and remove the wire between the 
two pins of the AC plug.

•

Check the cabinet for defects, to prevent the possibility of 
the customer touching any internal parts.

2.2

Maintenance Instructions

It is recommended to have a maintenance inspection carried 
out by qualified service personnel. The interval depends on the 
usage conditions:
•

When the set is used under normal circumstances, for 
example in a living room, the recommended interval is 
three to five years.

•

When the set is used in an environment with higher dust, 
grease or moisture levels, for example in a kitchen, the 
recommended interval is one year.

•

The maintenance inspection includes the following actions:
1.

Perform the 'general repair instruction' noted above.

2.

Clean the power supply and deflection circuitry on the 
chassis.

3.

Clean the picture tube panel and the neck of the picture 
tube.

2.3

Warnings

•

In order to prevent damage to ICs and transistors, avoid all 
high voltage flashovers. In order to prevent damage to the 
picture tube, use the method shown in Fig. 2-1, to 
discharge the picture tube. Use a high voltage probe and a 
multi-meter (position Vdc). Discharge until the meter 
reading is 0 V (after approx. 30 s).

Figure 2-1 Discharge picture tube

•

All ICs and many other semiconductors are susceptible to 
electrostatic discharges (ESD 



). Careless handling 

during repair can reduce life drastically. When repairing, 
make sure that you are connected with the same potential 
as the mass of the set by a wristband with resistance. Keep 
components and tools also at this potential.

•

Available ESD protection equipment:
–

Complete kit ESD3 (small tablemat, wristband, 
connection box, extension cable, and ground cable) 
4822 310 10671.

–

Wristband tester 4822 344 13999.

•

Together with the deflection unit and any multi-pole unit, 
flat square picture tubes form an integrated unit. The 
deflection and the multi-pole units are set optimally at the 
factory. Adjustment of this unit during repair is therefore not 
recommended.

•

Be careful during measurements in the high voltage 
section and on the picture tube.

•

Never replace modules or other components while the unit 
is switched 'on'.

•

When you align the set, use plastic rather than metal tools. 
This will prevent any short circuits and the danger of a 
circuit becoming unstable.

2.4

Notes

2.4.1

General

•

Measure the voltages and waveforms with regard to the 
chassis (= tuner) ground (



), or hot ground (



), depending 

on the area of circuitry being tested.

•

The voltages and waveforms shown in the diagrams are 
indicative. Measure them in the Service Default Mode (see 
“Service Modes, Error Codes, and Faultfinding” section) 
with a color bar signal and stereo sound (L: 3 kHz, R: 1 kHz 
unless stated otherwise) and picture carrier at 61.25 MHz 
(NTSC, channel 3).

•

Where necessary, measure the waveforms and voltages 
with (



) and without (



) aerial signal. Measure the 

voltages in the power supply section both in normal 
operation (



) and in standby (



). These values are 

indicated by means of the appropriate symbols.

V

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