Power Supply To This Unit Alone; To Check Signals - Technics SL-HD301 Service Manual

SL-HD301 / SL-HD501
7 Mesurements and Adjustments
Cautions:
eft is very dangerous to look at or touch the laser
beam. (Laser radiation is invisible.) With the unit
turned "ON" , laser radiation is emitted from the
pickup lens.
e Avoid exposure to the laser beam, especially when
performing adjustments.
This unit SL-HD301/501 is designed to operate on power
supplied from the Amplifier SE-HD301/501 through the
Tuner ST-HD301/501.When connecting the unit to other
system components, do not connect to the Amplifier SE-
HD301/501 directly. Be sure to connect this unit through the
Tuner ST-HD301/501.When operating the unit SL-
HD301/501 alone for testing and servicing, without having
i
(A.GND)
JK401- 18PIN
[LINE OUT(Lch)]
(Signal check)
MAIN P.C.B. (FOIL SIDE)
JK401- 17PIN
JK401- 16PIN
[LINE OUT(Rch)]
(Signal check)
power supplied from the Amplifier SE-HD301/501, use the
following method.
7.1. Power Supply to This Unit
alone
Apply 10V DC power to the section between JK401-
5pin(10VDC)and JK401-6pin(D.GND). (As shown in Fig. 3.)
7.2. To Check Signals
Connect the oscilloscope or the speaker with built-in amplifier
to the section between JK401-16pin[LINE OUT(Rch)] and
JK401-17pin(A.GND) as well as the section between JK401-
18pin[LINE OUT(Lch)] and JK401-17pin(A.GND) and check if
the signals are outputting from this unit. (As shown in Fig. 3.)
« JK401- 6PIN(D.GND)
JK401- 5PIN(10VDC)
(ei
Fig. 3
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