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regulated dc
power supply
HEADPHONES
SECTION
Note:
1. On adjusting the headphones section (MDR-IFS5), use the trans-
mitter (TMR-IF15) as a jig.
2. The
patterns
of the printed circuit boards for L-ch and R-ch
are common.
3.
L-ch
adjustment
should
be completed
before
performing
R-ch
adjustment.
[Preparation]
AF OSC
€)
attenuator
O
_—_—_—_—_—
\\
input plug
1 kHz 225 mV
1. Feed a signal to jig (TMR-IF5) and connect a power supply to
DC IN jack.
[Receiving Frequency Adjustment]
Adjusting Procedure:
1. Short circuit between TP2 and TP3.
2. Turn on the POWER
switch of the headphones.
3. Adjust with CT11
(L-ch) and CT51
(R-ch) so that the reading
on VTVM becomes maximum.
[Gain Adjustment] (Former Type Only)
Adjusting Procedure:
1. Adjust
to
make
the input
level
of jig (TMR-IF5)
as low
as
possible.
2. Adjust with CT12 (L-ch) and CT52 (R-ch) so that the reading on
VTVM
becomes maximum.
3. Release the short-circuit between TP2 and TP3.
[Connection and Adjustment Location]
FORMER TYPE
CT12 (L-ch)
CT52 (R-ch)
CTI! (Lech)
CT5I (Roh)
VTVM
(RX Leh/RX
Rch BOARD]
Setting:
AM rf signal
generator
No modulation
GND
2.8 MHz (Lch)
2.3 MHz (Rch)
output level: 100 mV (100 dB)
_ Adjustment Procedure:
1. Input to TP6 of Lch. (2.8 MHz)
2. Adjust
L53
of Rech so that the reading
on
VTVM
becomes
minimum.
3. Input to TP6 of Rech. (2.3 MHz)
4. Adjust
L13
of
Lch
so that the reading
on
VTVM
becomes
minimum.
[Connection and Adjustment Location]
NEW
TYPE
L13 (Leh)
L53 (Rech)
short circuit
CT11
(Leh)
CT51
(Rech)
regulated dc
power supply
2.5 V de
[RX Lch/RX
Rch BOARD]
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