GFM MJ840G
Instrukcja Serwisowa

STANDARD NOTES FOR SERVICING
Circuit Board Indications
1. The output pin of the 3 pin Regulator ICs is indicated as shown.

Pb (Lead) Free Solder
When soldering, be sure to use the Pb free solder.

How to Remove / Install Flat Pack-IC
Top View Out In Input Bottom View

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. S-1-1)

2. For other ICs, pin 1 and every fifth pin are indicated as shown.

5 Pin 1

10
3. The 1st pin of every male connector is indicated as shown.

Pin 1

Fig. S-1-1
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. S-1-6) 4. Release the flat pack-IC from the CBA using tweezers. (Fig. S-1-6) 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. S-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.

FFC Cable

Connector CBA

* Be careful to avoid a short circuit.

1-4-1

DVDN_SN