Commodore 1701 Service Manual page 26

[Faulty parts and problems other than described]
X401 open Vertical amplitude small (6 - 8 cm)
D401 short
Picture appears only on the lower half of the screen
C408 short
R403 faulty A single thick (ca. 5 mm) horizontal line
R404 faulty
When turning V. HOLD, a black belt (V blanking signal) appears at the center
of screen.
The whole screen is dark and flickers.
R405 faulty
A single horizontal line. A picture flashing at about 1 second interval appears
on the upper half of the screen.
R407 faulty A picture of about 4 cm at the center of the screen. About 25 irregular lines
appear on the upper half of the screen.
R408 and
Vertical amplitude small (about 15 cm)
R409 faulty
R410 faulty Vertical amplitude small (about 2 cm). Picture goes slightly up and down and
flickers.
R416 faulty
C409 open Vertical flyback line appears.
R419 faulty Small number of irregular lines
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