JVC DR-MV2SEU, Руководство по обслуживанию

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(No.YD087)1-5
1.2 STANDARD NOTES FOR SERVICING
1.2.1 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 fifth pin are indicated as
shown.
(3) The 1st pin of every male connector is indicated as shown.
1.2.2 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.
1.2.3 Pb (Lead) Free Solder
When soldering, be sure to use the Pb free solder.
1.2.4 How to Remove / Install Flat Pack-IC
1.2.4.1
Removal
1.2.4.1.1 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. 1)
Fig.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 CBA;
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. 6)
(4) Release the flat pack-IC from the CBA using tweezers.
(Fig. 6)
1.2.4.1.2 Caution:
(1) The Flat Pack-IC shape may differ by models. Use an ap-
propriate 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)
(3) The flat pack-IC on the CBA is affixed with glue, so be care-
ful not to break or damage the foil of each pin or the solder
lands under the IC when removing it.
Fig.2
Top View
Out In
Bottom View
Input
5
10
Pin 1
Pin 1
FFC Cable
Connector
CBA
* Be careful to avoid a short circuit.
Hot-air
Flat Pack-IC
Desoldering
Machine
CBA
Flat Pack-IC
Tweezers
Masking
Tape