Panasonic WJFS616 - SWITCHER, Service Manual

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CHIP COMPONENTS
1. Chip Transistor
The transistor number is indicated on the top surface of the
chip transistor using two alphabet letters or one numerical
number and two alphabet letters.
Transistor Number
(Chip Transistor)
(Small Chip Transistor) (Pair Transistor)
Example: WQ 2SD602-Q
YQ 2SD601-Q
1BS 2SB814-S
Rank of DC Current Gain (h
FE
)
Transistor Number
Letter Transistor No. Letter Transistor No.
A 2SB709 X 2SD602A
B 2SB709A
Y 2SD601
C 2SB710 Z 2SD601A
D 2SB710A 1A 2SB799
E 2SA1022 1B 2SB814
F 2SA1034 1C 2SB902
H 2SA1035 1F 2SK321
I 2SB792 1K 2SK316
K 2SC2778 1L 2SK247
P 2SD814 1M 2SJ84
Q 2SD813 1N 2SK199
R 2SC2480 1O 2SK198
S 2SC2405 1T 2SC3077
T 2SC2406 1X 2SC2845
U 2SC2404 1Z 2SD1030
V 2SC2295 2B 2SK374
W 2SD602 2C 2SK116
BQ 2SB766A UMT 2SC4081
Letter Transistor No.
A 2SB1218
U 2SC3931
W 2SD1820
Y 2SD1819
E3 2SA1226
OS 2SB1219
UC 2SA1532
YU 2SC3938
Letter Transistor No.
5R XN1501
7S XN1601
5H XN4501
5C XN4601
5N XN6501
5L XN5501
4N XN5601
7W XN6435
7F XN6534
5R XP1501
B 2SB1218A
D 2SB1219A
X 2SD1820A
Letter Transistor No.
7S XP1601
5H XP4501
5C XP4601
5H XP4501
7S XP6501
5L XP5501
4N XP5601
7W XP6435
X1 UMX1
Z1 UMZ1
7F XP6534
C: Collector
B: Base
E: Emitter
3
2
1
FET
C
B
E
Transistor
Gate
Drain
Source
1 2 3
Eacept 2SK199 Drain Source Gate
2SK199 Gate Drain Source
Appearance and Symbols
2. Chip Diode
The diode number is indicated on the top surface of the chip
diode using two alphabet letters.
Diode Number
3. Chip Resistor
The resistor value is indicated on the bottom surface of the
chip resistor using three digit numbers.
Example:
330 33 x 10
0
= 33
Ω
561 56 x 10
1
= 560
Ω
123 12 x 10
3
= 12 k
Ω
Note: Zero ohm resistor (jumper chip) is colored red or
green.
Type
Diode
M
Letter Diode No. Letter Diode No.
MA MA151A MI MA152K
MB MA152A MK MA28W-B
MC MA153 ML MA28T-A
MD MA28-A MN MA151WA
ME MA28-B MO MA152WA
MF MA28W-A MT MA151WK
MH MA151K MU MA152WK
MH MA141K 6.2 MA3062
MC MA143 SMD RD421D
Anode Cathode
3
2
1
Appearance and Symbols
1 2 3
MA28/MA28W/MA28T – Anode Cathode
MA151K/MA152K – Anode Cathode
MA151A/MA152A – Cathode Anode
MA151WK/MA152WK Anode Anode Cathode
MA151WA/MA152WA Cathode Cathode Anode
MA153 Cathode Anode Common
MA141K – Anode Cathode
MA143 Anode Cathode Common
MA3062 Anode – Cathode
RD421D Anode – Cathode
Rank of DC Current Gain (h
FE
)
Transistor Number
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 2.5 2.5 pF
.75 0.75 pF 33 33 pF
1 1 pF 82 82 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.
Numerical Value
* Letters I and O are not used.
Example: A1 10 x 10
1
= 100 pF
N2 33 x 10
2
= 3300 pF
S3 47 x 10
3
= 47000 pF
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.
Multiplier (1 - 5)
Numerical Value
Letter Value
A 10
B 11
C 12
D 13
E 15
F 16
G 18
H 20
J 22
K 24
L 27
M 30
Letter Value
N 33
P
36
Q 39
R 43
S 47
T 51
U 56
V 62
W 68
X 75
Y 82
Z 91
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.
5-2. Removal (IC)
1. Add the solder wick and soldering iron to each lead of the
IC and remove solder.
2. Add the soldering iron to each lead of the IC and left each
lead of the IC using thinner pin.
3. Remove the IC turning with 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.
3. Solder both ends of the chip (three leads for chip
transistor).
Tweezers
Chip
Soldering iron
Chip
Solder wick
Soldering iron
Chip
Thinner Pin Soldering iron
Pliers
Turn
Chip
Chip
Tweezers
Soldering iron
Solder
Solder
Soldering iron
Chip