IBM 5256-1 Maintenance Information Manual page 185

TB2 and line filter (continued)
ribbon feed rolls adjustment
ribbon feed rolls removal and
replacement 1-54
ribbon feed rolls service check
ripple level check 1-57
top cover 1-12
transistor (Q1) removal and
replacement 1-65
transistor (Q 1) service check
TB2 removal and replacement
tensioner assembly removal and
replacement 1-42
terms xiii
test points 1-93
tests, offline 1-74
theory 4-1
introduction 4-1
timing
end-of-forms 4-21
1-54
1-54
1-65
1-60
forms motor to emitter timing service
check 1-26
power off 4-21
power on 4-21
primary power 4-21
printer ready 4-21
reset 4-21
secondary power 4-21
see also timings
wire check 4-21
timings
power on and power off 4-20
print wire 4-32
tools and test equipment 3-1
tractor unit, forms 4-41
tractor, forms tractor unit disassembly and
assembly 1-32
tractor, forms tractor unit removal and
replacement 1-32
transfer of data 4-14
transformer removal and replacement 1-58
transistor (Q1) removal and
replacement 1-65
tra nsistor (Q 1) service check 1-65
AC cable assembly 1-13
AC capacitor (C12) and capacitor C3 1-63
back cover 1-12
belt tensioner assembly removal and
replacement 1-42
board B1 removal and replacement 1-67
carrier and main shaft removal and
replacement 1-41
carrier leaf spring and bearing removal
and replacement 1-43
carrier motor and pulley removal and
replacement 1-43
carrier support shaft removal and
replacement 1-41
control panel 1-13
copy control dial removal and
replacement 1-51
end-of-forms switch 1-30
fan Bl removal and replacement 1-60
X-8
transistor (Q1) service check (continued)
fan B2 removal and replacement 1-60
forms motor and emitter removal and
replacement 1-23
forms tractor unit 1-32
forms tractor unit chain removal and
replacement 1-35
front cover 1-12
paper deflector and platen removal and
replacement 1-17
planar board Bl removal and
replacement 1-67
platen and paper deflector 1-17
power adapter board C1 and capacitor
assembly 1-62
power supply board Aland cable removal
and
replacem~nt
1-64
power supply removal and
replacement 1-57
power transformer removal and
replacement 1-58
print emitter board removal and
replacement 1-38
print head adjustment 1-44
print head cable (EC1) removal 1-46
print head forms guide adjustment 1-45
print head forms guide removal and
replacement 1-45
print head removal and replacement 1-44
print head ribbon lifter removal and
replacement 1-48
print head ribbon shield removal,
replacement, and adjustment 1-49
print head ribbon shield service
check 1-49
print head service check 1-44
printer emitter pickup and amplifier
removal and replacement 1-37
removal and replacement 1-17
ribbon box and cover removal and
replacement 1-54
ribbon drive clutches removal and
replacement 1-52
ribbon drive gears removal and
replacement 1-54
ribbon drive lines removal and
replacement 1-52
ribbon drive removal and
replacement 1-52
ribbon drive shaft removal and
replacement 1-52
ribbon feed rolls adjustment 1-54
ribbon feed rolls removal and
replacement 1-54
ribbon feed rolls service check 1-54
top cover 1-12
transistor (Ql) removal and
replacement 1-65
transmission sequences 4-7