Sylvania 6319CCB, Руководство по обслуживанию, Страница: 10 / 108

STANDARD NOTES FOR SERVICING
Circuit Board Indications
1. The output pin of the 3 pin Regulator ICs is indicated
as shown:
2. For other ICs, pin 1 and every 5th pin is indicated as
shown:
3. The 1st pin of every pin connector are indicated as
shown:
Instructions for Connectors
1. When you connect or disconnect FFC cable (con-
nector), be sure to disconnect the AC cord.
2. FFC cable (connector) should be inserted parallel
into the connector, not at an angle.
[ CBA= Circuit Board Assembly ]
How to Read the Values of the Rec-
tangular Type Chip Components
Example:
(a) Resistor
(b) Capacitor
Caution:
Once chip parts (Resistors, Capacitors, Transistors,
etc.) are removed, they must not be reused. Always use
a new part.
Replacement Procedures for
Leadless (Chip) Components
The Following Procedures are Recom-
mended for the Replacement of the
Leadless Components Used in this Unit.
1. Preparation for replacement
a. Soldering Iron
Use a pencil-type soldering iron (less than 30 watts).
b. Solder
Eutectic solder (Tin 63%, Lead 37%) is recom-
mended.
c. Soldering time
Do not apply heat for more than 4 seconds.
d. Preheating
Leadless capacitor must be preheated before instal-
lation. (130°C~150°C, for about two minutes.)
Notes:
a. Leadless components must not be reused after
removal.
b. Excessive mechanical stress and rubbing for the
component electrode must be avoided.
2. Removing the leadless component
Grasp the leadless component body with tweezers
and alternately apply heat to both electrodes. When
the solder on both electrodes has melted, remove
leadless component with a twisting motion.
Top View
Out In
Bottom View
Input
5
10
Pin 1
Pin 1
473
= 473 = 47 [k
Ω
] (Top View)
= Not Shown (Top View)
FFC Cable
Connector
CBA
* Be careful to avoid a short circuit.
FNI 1-3-1 SFTY_5