475 Service
Page 5 of 10
Schematic Diagr a m and Board Photo Changes
Fig. 7-9 Board title should read: A4 Vertical Mode-Gain Switch
Circuit Board.
C329 is added to board above P300.
Schematic <^3^>
Board title at left should read PARTIAL A4, VERT MODE-GAIN SW BOARD
P300 Pin 1 (Index) input should read: From CR1102 <(10)>
The input to R320 should read: CH 2 SCALE FACTOR From S53
The input to R310 should read CH 1 SCALE FACTOR From S13 <^1^
U370 Pin 11 input should read: CH 1 + VERT SIG From Q178 < ^ > < ^ >
J410 output should read: CH 2 TRIG SIG TO CR703
C420 value is changed to 2.7 pF
Fig. 7-11
C494A and C494B are added at the right of R492 and R493
Preexisting R494 and C494 are changed to R494B & C494B
Schematic <^4/>
Change the details for S450A and U470 as indicated in the attached
partial schematics.
P450
R447 nominal value is 3.01 K.
Cl/373
Rev/573
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