Tektronix 323, Instruction Manual

Page: 66 / 170

Maintenance— Type 323
H orizontal A m p lifie r Troubleshooting Chart. In itia l setup: VOLTS/DIV a t 5 DIV CAL; POSITION controls “ in ” and centered; TIM E /
DIV a t 1 mS; TRIGGER a t + AUTO; T rig /H o riz Coupling switch at INT-AC; POWER — ON.
Fig. 4 -7 . H orizo ntal A m p lifie r tro ublesh ootin g chart.
Vertical P ream plifier and O utput A m p lifie r Troubleshooting Chart. In itia l setup: VOLTS/DIV a t 5 DIV CAL; POSITION controls “ in'
and centered;
TIM E /D IV a t 1 mS; TRIGGER a t + AUTO, T rig /H o riz Coupling switch a t INT — AC; POWER — ON .
Remove Q 1 6 0 and
Q 1 7 0 ; a ho rizonta l
line appears across
center o f CRT
N o _
/ C R ? \
y^Jn b la n k
ckt; Swp o r
\
N. Horiz
/
\ c k t s /
Yes
Replace Q 1 6 0 and
Q 1 7 0 ; connect bases
o f Q 1 0 3 and Q 10 9
together; a ho rizon­
ta l line appears ac­
ross center o f CRT
No
/ Vert O u t \
N. AmP
/
Yes
Vert Pre
Amp
4-10
®
Fig. 4 -8 . V ertical circuit tro ublesh ootin g chart.