Panasonic WJ-FS216 Service Manual page 24

4. Chip Capacitor
The capacitive value of replacement chip capacitors is
indicated on the bottom surface. Original parts have no
value indication.
If the capacitive value is less than 100 pF, the value will be
indicated by one or two digit number expressing the capacity
directly in pF.
Example:
0.5 0.5 pF
.75 0.75 pF
1 1 pF
If the capacitive value is 100 pF or greater, the value will be
indicated by an alpha-numeric code. The letter precedes the
number and expresses a numerical value to be multiplied by
the number which follows.
Multiplier (1 - 5)
Numerical Value
Numerical Value
Letter Value Letter Value
A 10 N
B 11 P
C 12 Q
D 13 R
E 15 S
F 16 T
G 18 U
H 20 V
J 22 W
K 24 X
L 27 Y
M 30 Z
* Letters I and O are not used.
Example: A1
N2
S3
5. Precautions in replacing the chip component
1. Make sure that the unit is turned OFF when replacing the
chip.
2. Use tweezers to prevent any damage to the chip surface.
3. Do not re-use the chips after removal.
4. Do not rub the electrode of chips.
5. Do not subject the chips to excessive stress.
6. It is recommended that a pencil-type soldering iron to be
used.
7. The solder whose diameter is less than 0.5 mm is
recommended.
8. Do not heat the chip more than 3 seconds.
9. Maintain temperature control under 260°C (500°F) when
soldering.
2.5 2.5 pF
33 33 pF
82 82 pF
33
36
39
43
47
51
56
62
68
75
82
91
1
10 x 10 = 100 pF
2
33 x 10 = 3300 pF
3
47 x 10 = 47000 pF
5-1. Removal (Transistor, Diode, Resistor and
Capacitor)
1. Add the solder to both ends of the chip (three leads for
chip transistor).
2. While attaching the soldering iron to both ends of the chip
(three leads for chip transistor) as shown below, remove
the chip by turning with tweezers.
Note: Be careful not to damage other chips.
Tweezers
Chip
Soldering iron
5-2. Removal (IC)
1. Add the solder wick and soldering iron to each lead of the
IC and remove solder.
Chip
2. Add the soldering iron to each lead of the IC and left each
lead of the IC using thinner pin.
Chip
3. Remove the IC turning with pliers.
Pliers
5-3. Mounting
1. Place the solder thinly on the chip mounting foil.
2. Solder the chip temporarily while holding the chip with the
tweezers.
Solder
3. Solder both ends of the chip (three leads for chip
transistor).
Chip
22
Solder wick
Soldering iron
Thinner Pin Soldering iron
Turn
Chip
Tweezers
Chip
Soldering iron
Solder
Soldering iron