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Table 4-3 . Troubleshooting Symptom Table - continued		Up
TM-11-7025-210-23 Line Printer RP-273/MYQ-4 Manual		Next
Table 4-3 . Troubleshooting Symptom Table - continued

TM 11-7025-210-23
Table 4-3 . Troubleshooting Symptom Table -- Continued
INDICATORS
ITEM
SYMPTOM
LIT
PROBABLE CAUSE
CORRECTIVE ACTION
SEE PARAGRAPH
8.
PAPER HANDLING PROBLEMS
a. Will not feed correctly
1. Toggle assembly bent
1. Replace toggle assembly
4-45
2. Platen drive gear
2. Replace platen drive gear
4-61
3. Line feed clutch
3. Lubricate linefeed clutch
4-40
binding or broken
Replace linefeed clutch
4-38
4. VFU assembly not adjusted
4. Adjust VFU assembly
4-69
5. Slew strobe assembly
5. Replace slew strobe assembly
4-41
6. Strobe detector assembly
6. Adjust strobe detector
not adjusted
assembly
4-42
7. Tractor shaft and gear
7. Replace tractor driveshaft
assembly worn or broken
and gear assembly
4-35
8. Friction brake worn
8. Replace friction brake
4-36
9. Jackshaft bearings worn
9. Replace jackshaft bearings
4-39
b. Tracks to one side
1. Obstruction holding
1. Clear paper path
2. Adjustment of forms
2. Reset vernier mechanism
3. Platen not locked at ends
3. Reinstall platen
3-14
4. Paper handler tractor
4. Replace paper handler tractor
4-37
9.
ON-LINE OPERATING PROBLEMS
a. Hammer fires repeatedly in column 1
1. Front reset tab missing.
1. Replace reference finger
4-60
b. Hammer fires each time
1. LHO board
1. Replace LHD board
4-23
finger passes photocell
c. Random hammer misfire
1. XPS arc suppression
1. Replace XPS board
4-65
defective
2. Insufficient grounding
2. Make sure printer is
grounded & all parts
are correctly installed.
3. LHO board
3. Swap LHO boards. Replace
4-23
faulty board
d. Primary fuse blows when
1. XPS board shorted
1. Replace XPS board
4-65
power applied
2. Wiring shorted from XPS
2. Repair wire or connector
3. HVS board
3. Replace HVS board
4-23
4. LHD board
4. Replace LHD board
4-23
5. PSR board
5. Replace PSR board
4-23
6. Transformer
6. Replace transformer
4-63
e. Blows primary fuse at
1. Shorted coil
1. Replace hammerbank assembly
4-46
particular hammer position
4-15

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