Specific Service Instructions - JVC LT-19D200 Service Manual

2.1 STANDARD NOTES FOR SERVICING
2.1.1 CIRCUIT BOARD INDICATIONS
(1) The output pin of the 3 pin Regulator ICs is indicated as
shown.
Top View
Out In
(2) For other ICs, pin 1 and every fifth pin are indicated as
shown.
Pin 1
(3) The 1st pin of every male connector is indicated as shown.
Pin 1
2.1.2 INSTRUCTIONS FOR CONNECTORS
(1) When you connect or disconnect the FFC (Flexible Foil
Connector) cable, be sure to first disconnect the AC cord.
(2) FFC (Flexible Foil Connector) cable should be inserted
parallel into the connector, not at an angle.
* Be careful to avoid a short circuit.
2.1.3 PB (LEAD) FREE SOLDER
Pb free mark will be found on PCBs which use Pb free
solder. (Refer to figure.) For PCBs with Pb free mark, be sure
to use Pb free solder. For PCBs without Pb free mark, use
standard solder.
Pb free mark

SPECIFIC SERVICE INSTRUCTIONS

Bottom View
Input
5
10
FFC Cable
Connector
CBA
SECTION 2
2.1.4 HOW TO REMOVE / INSTALL FLAT PACK-IC
2.1.4.1 REMOVAL
WITH HOT-AIR FLAT PACK-IC DESOLDERING MACHINE:
(1) Prepare the hot-air flat pack-IC desoldering machine,
then apply hot air to the Flat Pack-IC (about 5 to 6
seconds). (Fig.2-1)
(2) Remove the flat pack-IC with tweezers while applying
the hot air.
(3) Bottom of the flat pack-IC is fixed with glue to the PWB;
when removing entire flat pack-IC, first apply soldering
iron to center of the flat pack-IC and heat up. Then
remove (glue will be melted). (Fig.2-6)
(4) Release the flat pack-IC from the PWB using tweezers.
(Fig.2-6)
CAUTION:
(1) The Flat Pack-IC shape may differ by models. Use an
appropriate hot-air flat pack-IC desoldering machine,
whose shape matches that of the Flat Pack-IC.
(2) Do not supply hot air to the chip parts around the flat
pack-IC for over 6 seconds because damage to the
chip parts may occur. Put masking tape around the flat
pack-IC to protect other parts from damage. (Fig.2-2)
(3) The flat pack-IC on the PWB is affixed with glue, so be
careful not to break or damage the foil of each pin or
the solder lands under the IC when removing it.
CBA
Masking
Tape
Tweezers
Fig.2-1
Hot-air
Flat Pack-IC
Desoldering
Machine
Flat Pack-IC
Fig.2-2
(No.YA711<Rev.002>)1-5