Pioneer RX-Z16 Manual de servicio - Página 31
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RX-Z36.
RX-Z216
4.2 DECK BLOCK
4.2.1 Adjustment of Mechanical Section
@ Test tape : STD—301 (3kHz 30min)
@ Setting of high speed mode : Short-circuit TP409 and TP410 of the POWER assembly. To release the mode, disconnect the
short circuit.
1. Adjustment of tape speed
No.
Mode
Input signal
Adjustment location
Measuring
Adjustment value
Remarks
& Test tape
location
POWER
Press the PLAY button and adjust the
assembly
frequency to 3010Hz +10Hz. Make sure that
VR402
the wow and flutter is within 0.3%.
POWER
assembly
Playback
the STD-301
TP401
PLAY
tape to
POWER
(for RX —Z36)
(High
speed | 3H.
see
TP406
ae as
Y | or RX—Z16)
mode)
VR2404
Change to the high speed mode and press the
PLAY button. Adjust the frequency to 6020Hz
+20Hz.
4.2.2 Adjustment of Electric Section
MM Check and conduct the following before
List of Adjustment
adjusting the electric section.
Deck |
1. Adjustment of tape speed has been completed.
1. Head azimuth adjustment
2. Clean and demagnetize the head using a head eraser.
2. Playback level adjustment
3. When measured, the level should be OdBV = 1 Vrms.
4. Use side A of the specified tape for adjustment.
Deck 1]
STD-—331E : For adjustment of playback system.
1. Head azimuth adjustment
STD—630 : NORMAL blank tape
2. Playback level adjustment
5. Prepare the following measuring devices :
3. Recording level and bias level adjustment
AC millivoltmeter, Low-frequency oscillator,
Attenuator, Oscilloscope
6. Adjust
both
L and
R
channels,
unless
specified
otherwise.
7. Set the DOLBY NR switches to OFF (RX—Z36 only)
and MIC MIX to MIN.
8. Warm
up
the
unit
for
several
minutes
before
adjustment. Especially before adjusting the frequency
characteristics of recording and playback, warm up for 3
to 5 minutes in REC/PLAY mode.
9. Make sure to follow the proper order of the adjustment
procedure.
Any
change in the order may
cause
an
improper result.
NOTE :
As
the
reference
recording
level
is 250nwb/m
for
STD—331E, the recording level will be higher by 4 dB for
STD-—331B
(160nwb/m).
When
adjusting,
pay carefull
attention to the type of tape used.
30s
Os
10s
10s
10s
sve [wwe [ve nt folne] [melanin
Fig. 4-3
Test tape STD—331E
43