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MODELS: WS-55859 / WS-55909 / WS-65869 / WS-65909 / WS-73909
CHIP PARTS REPLACEMENT
Some resistors, shorting jumpers (0 Ohm resistors),
ceramic capacitors, transistors and diodes are chip parts.
The following precautions should be taken when replacing
these parts.
Cautions:
1. Use a fine tipped, well insulated soldering iron
(approximately 30 watts), and tweezers.
2. Melt the solder and remove the chip parts
carefully so as not to tear the copper foil from
the printed circuit board.
3. Discard removed chips; do not reuse them.
4. Do not apply heat for more than 3 (three)
seconds to new chip parts.
5. Avoid using a rubbing stroke when soldering.
6. Take care not to scratch, or damage the chip
parts when soldering.
7. Supplementary cementing is not required.
Chip Parts Removal (Resistors, Capacitors, etc.)
1. Grasp the part with tweezers. Melt the solder
at both sides alternately, and remove one side
of the part with a twisting motion.
2. Melt the solder at the other side and remove
the part.
Chip Parts Removal (Transistors)
1. Melt the solder of one lead and lift the side of
that lead upward.
2. Simultaneously melt the solder of the other
two leads and lift the part from the PCB.
Replacement
1. Presolder the contact points on the circuit
pattern.
2. Press the part downward with tweezers and
apply the soldering iron as shown.
Summary of Contents for WS-55859
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Page 61: ...MODELS WS 55859 WS 55909 WS 65869 WS 65909 WS 73909 Page 61 STANDBY SUPPLIES REGULATOR ...
Page 62: ...MODELS WS 55859 WS 55909 WS 65869 WS 65909 WS 73909 Page 62 SWITCHED SUPPLIES REGULATOR ...
Page 63: ...MODELS WS 55859 WS 55909 WS 65869 WS 65909 WS 73909 Page 63 DM POWER SUPPLY ...
Page 64: ...MODELS WS 55859 WS 55909 WS 65869 WS 65909 WS 73909 Page 64 VIDEO COLOR A V SWITCH CIRCUIT ...
Page 65: ...MODELS WS 55859 WS 55909 WS 65869 WS 65909 WS 73909 Page 65 PCB SIGNAL Y C PATH ...
Page 66: ...MODELS WS 55859 WS 55909 WS 65869 WS 65909 WS 73909 Page 66 SYNC PATH ...
Page 67: ...MODELS WS 55859 WS 55909 WS 65869 WS 65909 WS 73909 Page 67 DEFLECTION CIRCUIT X RAY PROTECT ...
Page 68: ...MODELS WS 55859 WS 55909 WS 65869 WS 65909 WS 73909 Page 68 SOUND CIRCUIT ...
Page 69: ...MODELS WS 55859 WS 55909 WS 65869 WS 65909 WS 73909 Page 69 CONVERGENCE CIRCUIT ...
Page 70: ...MODELS WS 55859 WS 55909 WS 65869 WS 65909 WS 73909 Page 70 CONTROL CIRCUIT ...
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