Tektronix 475 - Page 217

Page 2 of 10
ACTION CKT NO
PART NUMBER
S/N
475 Service
DESCRIPTION
Chg
R494A 317-0621-00 B050000
620 fl, 1/8 W, 57o
Add
R494B 311-0633-00 B050000
5 kfl, Var, (added when required)
Add
R550 317-0560-00
B060000
56 0, 1/8 W, 5%
Add
R560 317-0560-00
B060000
56 0, 1/8 W, 57„
Add
R584
316-0220-00 B060000
22 n, 1/4 W, 107»
Add
R792 316-0220-00
B060000
22 fl, 1/4 W, 107,
Chg
R806 315-0681-00
B060000
680 Q , "1/4 W, 57
Add
R824
316-0220-00 B060000
22 0, 1/4 W, 107,
Add
R910 321-0220-00
B060000 1.91 kfl, 1/8 W, 17,
Chg
R911
321-0314-00
B060000
18.2 kfi, 1/8 W, 17»
Chg
R912
321-0261-00
B060000
5.11 kn, 1/8 W, 17,
Chg
R952
321-0198-00 B060000
1.13 kfi, 1/8 W, 17o
Add
R1103
315-0272-00
B060000
2,7 kfi, 1/4 W, 57o
Chg
T1400 120-0799-01 B070000
LV Power
SCHEMATIC DIAGRAM and BOARD PHOTO CHANGES
Schematic <\ ^ >
R125 was a
variable resistor
in early production. Second board outline
down from
top of page should
be titled:
PARTIAL A4 VERTICAL MODE-GAIN
SWITCH BOARD.
Output at
right of T178 should read:
CH 1
+ VERT SIGNAL < ^ >
to Pin 11
U370 < ^>.
Output at
right of R189 should read:
CH 1
- VERT SIGNAL To Pin 10 U370
<V ^ )#
Refer to accompanying partial
schematic
for other changes.
Fig.
7-7 Title
for board in photo and grid
location chart should read:
A4 Vertical Mode-Gain Switch Circuit Board.
Cl/373