DYNACO Stereo 70 Petunjuk Untuk Perakitan - Halaman 16
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Halaman Cetak
*Measurements at these points vary from tube to tube and do
not indicate wbether performance is normal.
HMeasurements at these points can only be made with a vacuum
tube voltmeter. The two tubes in a pair should have identical
readings.
2ol10·yolt
120·..,olt
1
-<
VIOLET
~
II WHITE
BLACK
II WHITE
VIOLET
~
SPECIAL INSTRUCTIONS FOR OPTIONAL
120.240 VOLT POWER TRANSFORMERS
BLACK
Stereo 70s supplied with power transformer PA-521 may be connec-
ted for either 120 volt or 240 volt AC operation as follows:
For 120 Volt Operation
1 (
)
Twist together the black and black-white leads, and
connect both to lug A of the fuse post (5).
2
Twist together the violet and violet-white leads, and
connect both to lug #1 of the on-off switch
(5).
For 240 Volt Operation
1 (
)
Connect the black lead to lug A of the fuse post
(S).
2 (
)
Connect the violet lead to lug #1 of the on-ofT switch (5).
3 (
)
Twist together the violet-white and the black-white leads,
and solder them together. Insulate this connection with
electrical tape.
When connected for 240 volt operation, a 1
~
ampere slow blow fuse
should be used.
Printed circuit
Eyelets #3 and #18
370 volts dc
Selenium rectifier
Bottom
(+)
lug
50 ac
Top (-) lug
-65 dc
VOLTAGE TEST POINTS
Pin
#
Any EL-34
GZ-34
Either 7199
1
1.56
*
2
->
435
*
3
410
*
u
360 ac
u
4
I'<l
415
oj
1->
5
'<!'
-32**
~->
<.0
<D
6
-32**
360 ac
1.0
7
->
0
8
1.56
435
*
9
*
Capacitor lug
A
•
305
B
'"
375
C
415
D
...
435
117 V AC
PA-060
BL
+
20
10K-
+.50+.50
B~i
C
-.;,
22 K
6.8 K
~
o