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Maintenance—2246 1Y and 2246 Mod A Service
Table 6-2
External Inspection Checklist
Item
Inspect For
Repair Action
Cabinet, Front Panel, and
Cover
Cracks, scratches, deformations,
damaged hardware or gaskets.
Touch up paint scratches and
replace defective components.
Front-panel controls
Missing, damaged, or loose knobs,
buttons, and controls.
Repair or replace missing or
defective items.
Connectors
Broken shells, cracked insulation,
and deformed contacts. Dirt in
connectors.
Replace defective parts. Clean or
wash out dirt.
Carrying Handle
Correct operation.
Replace defective parts.
Accessories
Missing items or parts of items,
bent pins, broken or frayed cables,
and damaged connectors.
Replace damaged or missing items,
frayed cables, and defective
parts.
Table 6-3
Internal Inspection Checklist
Item
Inspect For
Repair Action
Circuit Boards
Loose, broken, or corroded solder
connections. Burned circuit boards.
Burned, broken, or cracked
circuit-run plating.
Clean solder corrosion with an
eraser and flush with isopropyl
alcohol. Resolder defective con
nections. Determine cause of
burned items and repair. Repair
defective circuit runs.
Resistors
Burned, cracked, broken, or
blistered.
Replace defective resistors. Check
for cause of burned component
and repair as necessary.
Solder Connections
Cold solder or rosin joints.
Resolder joint and clean with
isopropyl alcohol.
Capacitors
Damaged or leaking cases.
Corroded solder on leads or
terminals.
Replace defective capacitors. Clean
solder connections and flush with
isopropyl alcohol.
Semiconductor
Loosely inserted in sockets.
Distorted pins.
Firmly seat loose semiconductors.
Remove devices having distorted
pins. Carefully straighten pins (as
required to fit the socket), using
long-nose pliers, and reinsert
firmly. Ensure that straightening
action does not crack the pins,
causing them to break.
Wiring and Cables
Loose plugs or connectors. Burned,
broken, or frayed wiring.
Firmly seat connectors. Repair or
replace defective wires or cables.
Chassis
Dents, deformations, and damaged
hardware.
Straighten, repair, or replace
defective hardware.
6-3
Содержание 2246 1Y
Страница 13: ...2246A Service 7062 01 X The 2246 1Y or 2246 Mod A Portable Oscilloscope ...
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Страница 69: ...Theory of Operation 2246 1Y and 2246 Mod A Service 15 V 6081 07 3 32 Figure 3 4 Simplified Sweep Circuit ...
Страница 91: ...Theory of Operation 2246 1Y and 2246 Mod A Service 6081 12 6557 99 3 54 Figure 3 9 Power Supply block diagram ...
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Страница 278: ...Figure 9 5b Detailed 2246 1Y or 2246 Mod A block diagram part 2 R E ...
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Страница 304: ...A D D J U N 1991 ...
Страница 311: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 1 0 V r l III B f e I l i 6555 39 ...
Страница 314: ...15 14 13 12 11 10 9 8 7 6 5 12 11 10 9 8 7 AT117 A TI 271 1 2 3 4 5 6 6555 70 Figure 9 8 Hybrid pin identifiers ...
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Страница 321: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 2 SET READOUT CONTROL CCW OFF 6555 40 ...
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Страница 343: ...C l rti ...
Страница 344: ...WAVEFORMS FOR DIAGRAM 5 2246 1Y and 2246 Mod A Service HORIZ MODE A A SEC DIV 2M S HOLDOFF MIN CCW ...
Страница 345: ...HORIZ MODE ALT A SEC DIV 2M s B SEC DIV 5 mS HOLDOFF MIN DELAY INTENSIFIED ZONE STARTS MIDSCREEN ...
Страница 347: ...BEV JUNE 1991 7062 18 ...
Страница 349: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 6 6555 43 I ...
Страница 354: ...A L B i C 1 D 1 E i F i G 1 2 3 4 5 6 7 8 2246 1Y AND 2246 MOD A _________A fc A A REV JUNE 1991 7062 19 ...
Страница 355: ...I BOARD LOCATION 8K 8J 8H 7H 8H 8H 7J 8D 7H 8H 8J 8J 7K 8K 10D 6L 6K 6L 6K 6G 5H I ...
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Страница 372: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 9 MORE ...
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Страница 376: ...SCHEM LOCATION BOARD LOCATION 2E 2B 7F 4B 4J 5D 3J 5C 4L 6D 3L 6C 5L 7D 3L 7D 3M 7D 5M 7D IB 1A 1C 1A 2B 1A 3B 1A ...
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Страница 387: ...WAVEFORMS FOR DIAGRAM 11 6555 73 6557 48 ...
Страница 394: ...WAVEFORMS FOR DIAGRAM 12 2246 1Y and 2246 Mod A Service i f I S 1 f c i 4 i ...
Страница 395: ...WAVEFORMS FOR DIAGRAM 12 cont 2246 1Y and 2246 Mod A Service ...
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Страница 400: ...REV JUNE 1991 7062 39 ...
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Страница 406: ...B 2246 IV AND 2246 MOD A ...
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