Philips L05HD, Руководство по обучению

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*
*
470pF
470pF
HEADPHONE
ECO SUB
TO
TO
SPEAKERS
I166
I168
3157
1
2
3
1279
6
7
8
9
1232
1
2
3
4
5
I162
I163
2181
1u
I170
I169
I171
39K
3161
1
2
3
4
5
1254
2176
2178
F154
3156
1278
1
2
3
4
turned Off turning 7994 On, muting the output. Capacitor 2999 delays the turn-on of 7993 to
prevent a pop in the speaker at set turn On.
Side Jack panel (Figure 14)
The output of the audio amplifier is fed to the Headphone Jack located on the Side Jack
panel. The output to the speakers is switched Off when a headphone plug is inserted.
Finding the defective panel (Figures 15 and 16)
When troubleshooting the set, the defective panel requiring replacement or additional repair
must be located. The Power supplies, Deflection, 1fH inputs, and Audio outputs are located
on the Family board. The 2fH, CRT drive, and Deflection drive circuits are located on the
Trident board.
If the set turns On without a picture or sound, first check the power supplies located on the
Family board. If the set comes On, then shuts Off, there may be a problem with the shut-
down circuits which are located on the Family board. If the picture is missing, but sound and
high voltage are present, the problem may be located on the Trident panel.
FIGURE 14 - SIDE JACK PANEL
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