Tektronix 475 - Page 216

475 Service
Page 1 of 10
Includes corrections and changes with starting S/N as follows:
B020000 M 1 9 ,949
B030000 M20,017
B040000 M 1 9 ,283 M19,915
B050000 M 2 0 ,104 M19,994
B060000 M 1 9 ,883 M20,310 M19.855 M19,935 M20,205
B070000 M19,947
ELECTRICAL PARTS LIST CORRECTIONS
(Changed portions are underlined, ADD's are all new)
ACTION CKT NO.
PART NUMBER
S/N
DESCRIPTION
Chg A4
670-2243-00
ALL
VERT MODE-GAIN SW. Ckt. Brd. Assv.
Chg
A9
670-2239-00 ALL
INTERFACE Ckt. Brd. Assy.
Chg C420 281-0547-00
B060000
2.7 pF, Cer, 500 V
Chg C494A
283-0198-00
B050000
0.22 pF, Cer, 50 V, 20%
Add
C494B 283-0341-00
B050000
0.047 pF (added when required)
Chg
C515
281-0605-00 B060000
200 pF, Cer, 500 V
Remove C517 281-0579-00
B059999X
21 pF, Cer, 500 V, 5%
Remove C708
281-0579-00 B059999X
21 pF, Cer, 500 V, 5%
Chg
C735
281-0605-00 B060000
200 pF, Cer, 500 V
Chg
C913
290-0523-00 B060000
2.2 pF, Elect., 20 V, 20%
Add
CR910 152-0141-02 B060000
Silicon, 1N4152
Remove L552 276-0528-00 B059999X Core, ferramic suppressor
Remove L562
276-0528-00
B059999X
Core, ferramic suppressor
Add
L669
276-0507-00 B030000
Core, ferramic suppressor
Remove
L794 276-0507-00 B059999X
Core, ferramic suppressor
Chg
Q552
151-0434-00 B060000
Silicon, PNP, 2N4261
Chg
Q562
151-0434-00 B060000
Silicon, PNP, 2N4261
Chg
Q772
151-0434-00 B060000
Silicon, PNP, 2N4261
Chg Q782
151-0434-00
B060000
Silicon, PNP, 2N4261
Chg
R32, R34, R 3 5 , R36, R44 7 ,
& R454 are
selected parts, nominal
installed
value is listed
Cl/373