NAD 7155 - Internal View; Suggested Instrumentation Hookup

INTERNAL VIEW
SUGGESTED
INSTRUMENTATION
HOOKUP
fi seg es ap ee ae oe A oe ey NP ag eh oe) 2 a]
' OSCILLOSCOPE FM GENERATOR AUDIO OSC |
i |
1 \ 1
IN
(0)
|
3
I l
i
H vINeUT—XINPUT EXT. MOD. ag q eeoons i
aes | \
1 1
t
USE
ONLY
IF
FM
GENERATOR
WITH
BUILT-IN
SWEEP
UNAVAILABLE
:
OSCILLOSCOPE
FM GENERATOR
WITH BUILT-IN SWEEP
Rd IE: ST 10008
SWEEP
Y INPUT X INPUT [OUTPUT RF OUT.
VERT. HORIZ, $ ¢ °
DETECTOR
PROBE
BALUN
AC.
VTVM
esa fas ee cere he
PIN1 IC 102 3000
UNIT UNDER TEST
AC VTVM
INPUT
FROM
TUNER IC:
TO PIN1
Ic 102
TO TUNER GND.
AT FRONTEND
out
TO SCOPE
DISTORTION METER
DISTORTION
PUT Out
ry
PUT
Diodes should be point-contact
germanium; Some commonly
available types are:
PICTORIAL DIAGRAM OF DETECTOR PROBE
RY
c2
CENTER LEAD
TO SCOPE
\ SHIELD
Keep leads as shortas
minimize stray signal
0a80
OA81
AAIIS
1N60
1N34
1N22
possible, to
pickup.