Technics SU-V60 - Measurements and Adjustments; Idling (ICQ) Adjustment

How to remove the main P.C.B.
1. Remove the 6 screws (@ ~ @).
2. Cut theclamper (@ ).
3. Remove the 6 screws (@ ~ ®).
4, Remove the main P.C.B.
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Control positions and equipment used.
@ Volume knob co (Minimum) @ Speaker impedance switch
@ Main speaker selector , off @ DC electronic voltmeter (EVM)
@ Remote speaker selector
IDLING (ICO) ADJUSTMENT
. Test equipment connection is shown in figure.
Connect the DC EVM. on both channels.)
. Turn the 1CQ control volume (VR401, VR402)
counter-clockwise.
. Turn ON the set when it is cold, and 15 sec. later,
adjust VR401 and VR402 so that the voltage is
20mV.
Also,
check
that
the
voltage
is
18
—
47mV
(standard: 40mV) after lapse of 10 — 15 minutes.
(Below 50mV after lapse of 60 min.).
e
Adjustment
points
Voltage
control
Amp.
ICQ (bias)
40mV
Time
10 30sec. 2 min. 15 min.
Relay ON
(4 ~6 sec.)