Technics RS-B465 - Measurement and Adjustment Methods; Head, Speed, and Gain Adjustments

RS-B465
11
Procedure
1—3-10
11
Removal of the eject lever and
eject button
Eject Lever :
Eject Lever
1. Push the claw in the direction of the arrow ®. 3. Puil out the eject button.
2. Remove the eject lever in the direction of the arrow
©.
Removal of the power supply P.C.B.
Procedure
1-12
1. Remove the 1 flat cable (CN2).
2. Remove the 4 screws (@~®).
li’ MEASUREMENT AND ADJUSTMENT METHODES
Measurement Condition
@ Rec. level control; Maximum @ Balance control; Center
@ Timer stand-by switch; Off @ Make sure heads are clean
@
Noise
reduction
select
switch;
Off
@
Make
sure
capstan
and
pressure
roller
are
clean
@ MPX filter switch; Off @ Judgeable room temperature 20+5°C(68219°F)
Measuring instrument
@ EVM(Electronic Voltmeter) @ ATT(Attenuator)
@ Oscilloscope @ DC volimeter
@ Digital frequency counter @ Resistor (6000)
@ AF oscillator
Test tape
@
Head
azimuth
adjustment
(8kHz,
-20dB);
QZZCFM
@
Playback
gain
adjustment
(315Hz,
0dB);
QZZCFM
@
Tape
speed
adjustment
(3kHz,
-10dB);
QZZCWAT
@
Overall
frequency
response,
Overall
gain
adjustment
@
Playback
frequency
response
(315Hz,
12.5kHz,
10kHz,
Normal
reference
blank
tape;QZZCRA
8kHz, 4kHz, 1kHz, 250Hz, 125Hz, 63Hz, -20dB); CrQz reference blank tape; QZZCRX
QZZCFM Metal reference blank tape; QZZCRZ