Werbung
5-4. Inductor Indication
=
Tolerance
++ etO0.1%
+2 ++0.25 %
++ +t 0.5 %
eeet
1%
oe et 2%
2+ +t10%
++ ++20%
PL
---Peaking
For others, model name is described.
oe
x
(x
Tolerance
5-5. Waveform and Voltage Measurement
*
Measurement of waveform and voltage at each section in the color circuits was conducted with sufficient service color
bar signal being received and reproduced in normal conditions.
*
Waveforms and voltage values for the remaining circuit were measured with a broadcasting signal normally received,
so they may vary slightly according to the programs being received. Use them as a measure for servicing.
*
All voltage values except the waveforms are expressed in DC and measured by a digital voltmeter.
5-6. Chip Part Replacement
(Use spare part with wire leads connected.)
1. Hold a Chip part to be removed with tweezers and apply heat to the solder at one end of the part with a soldering iron.
(Fig. 1)
2. Apply heat to the solder at the other end of the part and remove it.
The heating time should be as short as possible so the excessive heat is the applied to foil patterns and the P C Board.
3. If it is difficult to remove the part, temporarily stop the desoldering job and wait until temperature of the part lowers.
Then, repeat steps | and 2.
4. Form leads of the replacement part (general part equivalent to the chip part) as shown in the figures and solder place.
(Fig. 2)
5. Mount the replacement part so that it does not touch any other parts. (Fig. 3)
fF
Ace
Seb
Ca
=m)
:
:
i
3- 4mm
|
|
a
b—|
S°
AI
AI
3- 4mm
oo
2
SSSeceo]l,
o
Fig. 1
Fig. 2
Fig. 3
Werbung
