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V. ELECTRICAL ADJUSTMENT
NOTE:
1) The following adjustment should be performed in
the test mode.
To engage the test mode, connect the AC power
cord to the AC outlet while pressing the > and
"44 buttons together.
When the test mode is engaged, X1 dub lamp is
lit.
STEP ADJUSTMENT
1. TEST TAPE/INPUT SIGNAL
2. MODE
SS
Adjustment Part
3. CHECK POINT, ADJUSTMENT PART | ~~
4, REMARKs (¢) and RESULT (*)
™~
™ Test Point
Connector J201 fo
TEST POINT 1R
e
Pin @
a
TEST POINT 2
2) When performing the tape speed adjustment,
6 | TAPEII PB LEVEL (AX-650 ONLY)
5
TAPE! PB LEVEL (AX-650 ONLY)
oe
Tt.
Pin
observe the following notes.
1. 315Hz test tape (TF-101CL)
1. 315Hz test tape (TF-101CL)
7 ase
Pin ®
e Adjustment should be started more than 30
2. PLAY
2. PLAY
Pin
GND
seconds after the power is ON.
3. TEST POINT 1L & 1R, VR102 (L-ch) / VR152
3. TEST POINT 1L & 1R, VR101 (L-ch) / VR151
TEST PONT SL
e Adjustment should be made on X2 speed mode
(R-ch)
(Reh)
Pin @
first then adjust normal speed mode.
4. eConnect an AC milli-voltmeter to the TEST
4. eConnect an AC milli-voltmeter to the TEST
e Adjustment should be made in the forward
POINT 1L &1R.
POINT 1k & 1R.
DECK
PCB
direction.
*-6.0dBs
*-6.0dBs
3) An AC milli-volt meter input should be terminated
with 20k ohms register in parallel.
2 . TAPE | NORMAL TAPE SPEED
dBs.
a Gop hla tee ape
ee)
Playback levels after recording are -6.0dBs
2. PLAY
3. TEST POINT 1L, VR653
4. eConnect a frequency counter to the TEST
8 | NORMAL POSITION BIAS (AX-650 ONLY)
POINT 4L.
1. 1 kHz and 10 kHz, -26.0 dBs (LINE OUT),
43,150 + 10Hz
NORMAL recording test tape (UD-124).
2. REC -> PLAY
3. TEST POINT 1L & 1R, VR402 (L-ch) / VR403
3 | TAPE Il (X2) TAPE SPEED
13S
rete
(R-ch)
(R_
ch)
1 3 150Hz test ta
-
[poooche~
4. eConnect an AC Milli-voltmeter to the TEST
.
3 ,
pe (TF-110CT)
Pios
<e,
Lp
2. PLAY (press the x2 DUBBING START button)
Se
|
POINT 1L & 1R.
3. TEST POINT 1L, VR654
~
nas 2 '
e Connect an audio signal generator to the TEST
4. eConnect a frequency counter to the TEST
=
POINT 2L & 2R and set the generator level so
o
that the TEST POINT 1L & 1R levels are -26.0
POINT 1L.
8
:
*6,300 + 20Hz
dBs.
Sw. 7401
Playback level difference between 1kHz and
Se
10kHz after recording is within + 0.3dB.
4 | TAPE Il! NORMAL TAPE SPEED
:
|
1. 3,150Hz test tape (TF-110CT)
a
7 _ BIAS OSC FREQUENCY
2. PLAY
1. CrO2 type blank tape
3. TEST POINT 1L, VR652
2. REC
4. «Connect a frequency counter to the TEST
DECK
PCB
3. TAPE li, T401 (P102)
POINT 4L.
4. «Connect a frequency counter between P102 ©
%*3,150 + 10Hz
pin and GND.
*100.0 + 0.2kHz
SERVICE MANUAL
24
1. 1 kHz, -6.0 dBs (LINE OUT), NORMAL recording
1
TAPE | (X2) TAPE SPEED
test tape (UD-124)
1. 3,150Hz test tape (TF-110CT)
2. REC + PLAY
2. PLAY (press the x2 DUBBING START button)
3. TEST POINT 1L & 1R, VR351 (L-ch) / VR301
3. TEST POINT 1L, VR651
(R-ch)
4. eConnect a frequency counter to the TEST
4. «Connect an AC Milli-voltmeter to the TEST
POINT 1L.
POINT 1L &1R.
6,300 + 20 Hz
[9 | RECORDING LEVEL (AX-650 ONLY)
¢Connect an audio signai generator to the TEST
POINT 2L & 2R and set the generator level so
that the TEST POINT 1L & 1R levels are -6.0
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