Marantz BD7003 Service Manual page 13

With Iron Wire:
With Iron Wire:
1. Using desoldering braid, remove the solder from 1. Using desoldering braid, remove the solder from
all pins of the flat pack-IC. When you use solder all pins of the flat pack-IC. When you use solder
flux which is applied to all pins of the flat pack-IC, flux which is applied to all pins of the flat pack-IC,
you can remove it easily. (Fig. S-1-3)
you can remove it easily. (Fig. S-1-3)
2. Affix the wire to a workbench or solid mounting
2. Affix the wire to a workbench or solid mounting
point, as shown in Fig. S-1-5. point, as shown in Fig. S-1-5.
3. While heating the pins using a fine tip soldering 3. While heating the pins using a fine tip soldering
iron or hot air blower, pull up the wire as the solder iron or hot air blower, pull up the wire as the solder
melts so as to lift the IC leads from the CBA melts so as to lift the IC leads from the CBA
contact pads as shown in Fig. S-1-5. contact pads as shown in Fig. S-1-5.
4. Bottom of the flat pack-IC is fixed with glue to the 4. Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply CBA; when removing entire flat pack-IC, first apply
soldering iron to center of the flat pack-IC and heat
soldering iron to center of the flat pack-IC and heat
up. Then remove (glue will be melted). (Fig. S-1-6) up. Then remove (glue will be melted). (Fig. S-1-6)
5. Release the flat pack-IC from the CBA using 5. Release the flat pack-IC from the CBA using
tweezers. (Fig. S-1-6) tweezers. (Fig. S-1-6)
Note: When using a soldering iron, care must be Note: When using a soldering iron, care must be
taken to ensure that the flat pack-IC is not taken to ensure that the flat pack-IC is not
being held by glue. When the flat pack-IC is being held by glue. When the flat pack-IC is
removed from the CBA, handle it gently removed from the CBA, handle it gently
because it may be damaged if force is applied. because it may be damaged if force is applied.
To Solid To Solid
Mounting Point Mounting Point
CBA CBA
Tweezers Tweezers
Hot Air Blower Hot Air Blower
or or
Iron Wire Iron Wire
Soldering Iron Soldering Iron
Fig. S-1-5
Fig. S-1-5
Fine Tip Fine Tip
Soldering Iron Soldering Iron
Flat Pack-IC Flat Pack-IC
Fig. S-1-6 Fig. S-1-6
2. Installation 2. Installation
1. Using desoldering braid, remove the solder from
1. Using desoldering braid, remove the solder from
the foil of each pin of the flat pack-IC on the CBA the foil of each pin of the flat pack-IC on the CBA
so you can install a replacement flat pack-IC more so you can install a replacement flat pack-IC more
easily. easily.
2. The "�" mark on the flat pack-IC indicates pin 1. 2. The "�" mark on the flat pack-IC indicates pin 1.
(See Fig. S-1-7.) Be sure this mark matches the 1 (See Fig. S-1-7.) Be sure this mark matches the 1
on the PCB when positioning for installation. Then on the PCB when positioning for installation. Then
presolder the four corners of the flat pack-IC. (See presolder the four corners of the flat pack-IC. (See
Fig. S-1-8.) Fig. S-1-8.)
3. Solder all pins of the flat pack-IC. Be sure that 3. Solder all pins of the flat pack-IC. Be sure that
none of the pins have solder bridges. none of the pins have solder bridges.
Example : Example :
Pin 1 of the Flat Pack-IC Pin 1 of the Flat Pack-IC
is indicated by a " is indicated by a "
CBA CBA
1-4-3
11
1-4-3
" mark. " mark.
Fig. S-1-7 Fig. S-1-7
Presolder Presolder
Flat Pack-IC Flat Pack-IC
Fig. S-1-8 Fig. S-1-8
DVDP_SN
BDN_SN