W7PUA DSP-10 Assembly

Resistors, Thick Film Chip, Surface Mount

insert resistor picture here

Solder the following surface mount 1/8W 5% Size 1206 Thick Film Chip Resistors. If you have difficulty verifying the resistance value you may check with an ohmmeter. Dimensions are referenced to the lower left corner of the board (by the fuse clips for FS1.) The first number is to the right and the second number is up. Dimensions listed in inches and mm.

r26_01.jpg (40739 bytes)
Click to Enlarge

 Step 1:
Apply a very small amount of solder to both pads.  The solder should form a slight bulge as shown in the photo.

r26_02.jpg (44038 bytes)
Click to Enlarge

 Step 2:
Place the component on top of the pads.

r26_03.jpg (40431 bytes)
Click to Enlarge

 Step 3:
Apply a small amount of no-clean flux to the component and pads. 
(NOTE: the photo shows an excess of flux being applied. The flux dispenser was not cooperating for the photo! -N7HPR)

r26_04.jpg (44778 bytes)
Click to Enlarge

 Step 4:
Using two soldering irons, apply heat to the pads at the same time. The component will center itself due to surface tension of the molten solder. Apply only enough heat to get the job done.

r26_05.jpg (45005 bytes)
Click to Enlarge

 Step 5:
Clean the flux residue with Isopropyl Alcohol (IPA). Inspect the solder joint. The solder should form a fillet and appearance should be neat, clean, smooth and shiny.

Assembly Notes:
  1. Work with one value at a time.

 

Designator Value Position (inch) Position (mm) Supplier Part Number Mfr. Data Sheet
[  ] R10 2.2 W (1.7 x 4.7 inch) (43.2 x 119.1 mm) Digi-Key
Mouser		 P2.2ECT-ND
263-2.2		 Panasonic
Xicon
[  ] R42 2.7 W (3.4 x 0.9 inch) (86.4 x 22.2 mm) Mouser 263-2.7 Xicon
[  ] R43 2.7 W (3.4 x 1.5 inch) (86.0 x 38.4 mm)
[  ] R11 22 W (1.9 x 4.7 inch) (48.6 x 119.1 mm) Mouser 263-22 Xicon
[  ] R111 22 W (4.8 x 3.0 inch) (121.0 x 75.9 mm)
[  ] R112 22 W (5.0 x 2.3 inch) (127.6 x 57.8 mm)
[  ] R60 47 W (6.0 x 1.9 inch) (152.4 x 48.3 mm) Mouser 263-47 Xicon
[  ] R121 47 W (2.2 x 1.7 inch) (55.6 x 43.5 mm)
[  ] R62 68 W (6.4 x 1.8 inch) (161.6 x 45.7 mm) Mouser 263-68 Xicon
[  ] R20 100 W (4.4 x 4.3 inch) (110.8 x 110.2 mm) Mouser 263-100 Xicon
[  ] R22 100 W (3.9 x 4.5 inch) (98.4 x 113.3 mm)
[  ] R44 100 W (5.0 x 1.8 inch) (126.4 x 44.5 mm)
[  ] R45 100 W (5.0 x 1.9 inch) (126.4 x 47.0 mm)
[  ] R50 100 W (5.2 x 1.1 inch) (133.0 x 27.3 mm)
[  ] R59 100 W (5.8 x 1.2 inch) (147.3 x 31.1 mm)
[  ] R67 100 W (2.8 x 1.9 inch) (72.1 x 47.9 mm)
[  ] R110 100 W (4.6 x 2.4 inch) (117.5 x 61.3 mm)
[  ] R150 100 W (3.8 x 2.8 inch) (97.2 x 70.5 mm)
[  ] R123 220 W (1.5 x 1.4 inch) (37.1 x 35.2 mm) Mouser 263-220 Xicon
[  ] R1 330 W (1.4 x 6.0 inch) (34.9 x 153.3 mm) Mouser 263-330 Xicon
[  ] R2 330 W (1.6 x 6.0 inch) (40.0 x 153.3 mm)
[  ] R3 330 W (1.8 x 6.1 inch) (45.1 x 154.0 mm)
[  ] R5 330 W (2.4 x 4.2 inch) (61.0 x 107.3 mm)
[  ] R6 330 W (2.1 x 4.2 inch) (52.1 x 106.7 mm)
[  ] R7 330 W (2.1 x 4.3 inch) (52.1 x 109.0 mm)
[  ] R61 330 W (6.1 x 1.7 inch) (155.2 x 43.2 mm)
[  ] R64 330 W (6.1 x 2.2 inch) (155.2 x 55.6 mm)
[  ] R113 330 W (5.1 x 2.7 inch) (129.8 x 68.9 mm)
[  ] R114 330 W (5.5 x 3.2 inch) (140.6 x 81.3 mm)
[  ] R28 470 W (2.2 x 1.4 inch) (55.6 x 35.9 mm)
[  ] R58 470 W (5.7 x 1.1 inch) (144.2 x 26.7 mm)
[  ] R63 470 W (6.1 x 2.3 inch) (155.2 x 58.1 mm)
[  ] R68 470 W (2.4 x 4.1 inch) (61.0 x 105.1 mm)
[  ] R107 470 W (2.7 x 2.2 inch) (69.5 x 55.6 mm)
[  ] R109 470 W (2.7 x 2.4 inch) (69.5 x 60.6 mm)
[  ] R136 470 W (1.1 x 2.3 inch) (28.9 x 58.7 mm)
[  ] R140 470 W (2.1 x 2.9 inch) (53.3 x 72.7 mm)
[  ] R144 470 W (2.1 x 3.2 inch) (53.3 x 81.6 mm)
[  ] R148 470 W (5.6 x 3.2 inch) (142.9 x 81.3 mm)
[  ] R149 470 W (5.4 x 3.3 inch) (137.8 x 82.9 mm)
[  ] R4 680 W (1.5 x 5.0 inch) (36.8 x 127.6 mm)

NOTE: 

The silkscreen for R12 is hard to see on the PCB. It is located to the upper-right of C81. Verify placement using the parts layout figure.
[  ] R12 680 W (0.7 x 4.7 inch) (18.1 x 119.1 mm)
[  ] R65 680 W (1.2 x 6.0 inch) (29.9 x 153.3 mm)
 
[  ] R9 1K W (1.7 x 4.5 inch) (43.5 x 114.6 mm)
[  ] R19 1K W (4.1 x 4.4 inch) (104.4 x 112.7 mm)
[  ] R25 1K W (1.9 x 1.2 inch) (48.6 x 29.5 mm)
[  ] R101 1K W (0.5 x 0.8 inch) (12.7 x 20.6 mm)
[  ] R102 1K W (0.8 x 0.8 inch) (20.3 x 20.6 mm)
[  ] R103 1K W (3.5 x 2.9 inch) (88.9 x 73.0 mm)
 
[  ] R51 1.8K W (5.2 x 0.9 inch) (133.0 x 22.2 mm)
[  ] R52 1.8K W (5.2 x 0.8 inch) (133.0 x 19.7 mm)
 
[  ] R55 2.2K W (4.7 x 1.5 inch) (118.1 x 36.8 mm)
[  ] R56 2.2K W (4.7 x 1.3 inch) (118.1 x 31.8 mm)
[  ] R57 2.2K W (4.7 x 1.1 inch) (118.1 x 26.7 mm)
 
[  ] R14 2.7K W (5.0 x 5.0 inch) (126.4 x 126.0 mm)
 
[  ] R8 3.3K W (1.7 x 4.4 inch) (42.9 x 110.8 mm)
[  ] R17 3.3K W (4.7 x 4.8 inch) (120.3 x 121.0 mm)
[  ] R29  3.3K W (2.2 x 1.2 inch) (56.2 x 29.5 mm)
 
[  ] R108 4.7K W (2.7 x 2.3 inch) (69.5 x 58.1 mm)
[  ] R119 4.7K W (2.2 x 1.5 inch) (55.6 x 38.4 mm)
[  ] R120 4.7K W (2.2 x 1.6 inch) (55.6 x 41.0 mm)
 
[  ] R18 5.6K W (4.3 x 4.9 inch) (109.0 x 124.8 mm)
 
[  ] R15 6.8K W (5.0 x 4.9 inch) (126.4 x 123.5 mm)
[  ] R16 6.8K W (4.7 x 4.9 inch) (120.3 x 123.5 mm)
 
[  ] R13 10K W (5.9 x 4.4 inch) (149.5 x 111.8 mm)
[  ] R21 10K W (4.3 x 4.8 inch) (108.9 x 121.6 mm)
[  ] R26 10K W (1.9 x 0.8 inch) (47.9 x 21.0 mm)
[  ] R27 10K W (2.2 x 0.8 inch) (56.5 x 19.7 mm)
[  ] R30 10K W (2.3 x 3.5 inch) (58.1 x 89.8 mm)
[  ] R31 10K W (2.3 x 3.6 inch) (58.1 x 92.4 mm)
[  ] R33 10K W (5.2 x 4.3 inch) (132.7 x 109.5 mm)
[  ] R34 10K W (5.6 x 4.6 inch) (142.9 x 117.5 mm)
[  ] R37 10K W (4.0 x 0.7 inch) (100.6 x 16.5 mm)
[  ] R38 10K W (3.9 x 1.6 inch) (99.1 x 40.0 mm)
[  ] R104 10K W (2.9 x 2.5 inch) (74.3 x 64.4 mm)
[  ] R122 10K W (1.5 x 1.3 inch) (37.1 x 32.7 mm)
[  ] R125 10K W (1.1 x 2.2 inch) (28.9 x 55.6 mm)
[  ] R126 10K W (1.0 x 1.9 inch) (26.0 x 47.6 mm)
[  ] R127 10K W (1.8 x 2.0 inch) (46.4 x 49.8 mm)
[  ] R128 10K W (1.8 x 2.1 inch) (46.4 x 52.4 mm)
[  ] R129 10K W (5.2 x 0.4 inch) (131.1 x 10.2 mm)
[  ] R130 10K W (4.4 x 0.4 inch) (111.4 x 10.8 mm)
[  ] R131 10K W (4.4 x 0.3 inch) (111.4 x 7.9 mm)
[  ] R132 10K W (5.2 x 0.1 inch) (131.1 x 2.5 mm)
[  ] R133 10K W (4.4 x 0.2 inch) (111.4 x 5.1 mm)
[  ] R134 10K W (4.4 x 0.1 inch) (111.4 x 2.2 mm)
[  ] R139 10K W (2.1 x 2.8 inch) (53.3 x 70.5 mm)
[  ] R147 10K W (2.2 x 2.4 inch) (56.5 x 61.0 mm)
[  ] R151 10K W (1.7 x 1.1 inch) (42.9 x 27.3 mm)
 
[  ] R143 22K W (2.1 x 3.1 inch) (53.3 x 79.4 mm)
 
[  ] R46 33K W (4.7 x 1.7 inch) (120.3 x 41.9 mm)
[  ] R105 33K W (3.2 x 2.4 inch) (81.6 x 61.0 mm)
[  ] R138 33K W (2.1 x 2.7 inch) (53.3 x 68.3 mm)
[  ] R145 33K W (3.1 x 2.4 inch) (77.8 x 60.6 mm)
 
[  ] R35 47K W (4.3 x 0.7 inch) (108.0 x 18.4 mm)
[  ] R36 47K W (4.3 x 1.5 inch) (108.0 x 39.0 mm)
[  ] R48 47K W (5.0 x 1.0 inch) (126.0 x 26.3 mm)
[  ] R49 47K W (5.0 x 1.0 inch) (126.0 x 24.1 mm)
[  ] R54 47K W (5.9 x 0.9 inch) (149.9 x 23.2 mm)
 
[  ] R137 75K W (2.1 x 2.6 inch) (53.3 x 66.0 mm)
[  ] R142 75K W (2.1 x 3.0 inch) (53.3 x 77.1 mm)
 
[  ] R23 100KW (4.4 x 4.4 inch) (110.8 x 112.7 mm)
[  ] R24 100K W (4.5 x 4.6 inch) (114.6 x 117.1 mm)
[  ] R39 100K W (4.3 x 0.9 inch) (108.0 x 21.6 mm)
[  ] R40 100K W (4.0 x 0.8 inch) (100.6 x 20.0 mm)
[  ] R41 100K W (4.0 x 1.5 inch) (99.1 x 37.1 mm)
[  ] R47 100K W (4.7 x 1.8 inch) (120.3 x 46.7 mm)
[  ] R53 100K W (5.9 x 0.8 inch) (149.9 x 20.6 mm)
[  ] R66 100K W (4.3 x 1.4 inch) (108.0 x 36.2 mm)
[  ] R106 100K W (4.2 x 2.5 inch) (106.4 x 62.9 mm)
[  ] R146 100K W (2.2 x 2.2 inch) (55.9 x 54.6 mm)
[  ] R152 100K W (4.1 x 2.9 inch) (104.4 x 74.0 mm)
 
[  ] R141 180KW (2.1 x 3.0 inch) (53.3 x 74.9 mm)
 
[  ] R135 1M W (1.0 x 2.5 inch) (25.4 x 64.4 mm)

 

Page Last Revised: August 30, 2003