Adjustment - Kenwood X-W320 Service Manual

-W320
INPUT
No. ITEM
SETTINGS
Unless otherwise specified : each ; switch should be set as follows :
TAPE : NORMAL, DOLBY : OFF, INPUT : LINE
I.Cassette mechanism section (REC/PB head adjustment)
Demagnetization
[1]
and cleaning
MTT-114,
REC/PB head
[2] TCC-153
azimuth
SCC-1727
II. Printed circuit board adjustment. Note : First perform the high-speed adjustment.
Tape HIGH
speed
(A DECK)
MTT-111
NOR.
TCC-100
<1>
SCC-1727
3kHz, -4dB
Tape HIGH
speed
(B DECK)
NOR.
Playback level
(A DECK)
<2> TCC-130
Playback level
(B DECK)
<3> MPX filter 19kHz, -20dB
1kHz,15mV
<5> Bias current
10kHz,15mV
<4> Recording level 1kHz, 200mV
SYSTEM CONNECTIONS
REC/PB UNIT
1
LINE
2
REC PLAY
SYSTEM GND
IN OUT
CONTROL
TP201(L)
L TP202(R)
R
AG
C voltmeter
(A)
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ADJUSTMENT

OUTPUT CASSETTE TAPE
SETTINGS DECK SETTINGS
Power OFF, demagnetization,
– –
(B)
1. Playback a TEST TAPE
2. Connect collector (Q404)/
R404 to GND via1kΩ.
TP201
3. Disconnect a 1kΩ.
or
TP202
1. Playback a TEST TAPE.
(B)
2. Connect collector (Q508)
/R524 to GND via 1kΩ.
3. Disconnect a 1kΩ.
REC LEVEL 0dB
DOLBY B MODE
• Adjust the REC LEVEL vol-
ume so that the recording
monitor output becomes
TP201(L)
15mV at 1kHz.
TP202(R)
• Record 1kHz and 10kHz alter-
(B)
nately.
• Rewind and playback record-
ed signal.
• Adjust the REC LEVEL vol-
ume so that the recording
monitor output becomes
200mv at 1kHz.
• Record 1kHz.
•
Rewind and playback record-
ed signal.
AC 110 - AC 220 -
240V
120V
AC voltmeter
Oscilloscope
Frequency counter
(B)
ALIGNMENT
POINTS
REC/PB
head, erase
head. cap-
cleaning play
stan, pinch
roller
Azimuth
PLAY adjustment
screw.
HIGH VR401
NOR. VR402
HIGH VR501
NOR. VR502
VR403(L)
VR404(R)
PLAY
VR503(L)
VR504(R)
L 203(L)
L 204(R)
VR101(L)
VR102(R)
VR201(L)
VR202(R)
(a) AZIMUTH ADJUSTMENT
SCREW
ALIGN FOR FIG.
0dBs=0.775V
Demagnetize the REC /PB
head by head eraser.
Clean the REC/PB head,
erase head capstan and
pinch roller with a cotton
swab immersed in alcohol.
Maximize the output and
adjust so that the Lis-
(a)
sajous figure nears a line
slanted 45°.
Adjust so that the frequen-
cy is 6kHz(HIGH), 3kHz
(NOR) at the tape center.
775mV
775mV ± 2dB
15mV ±1dB
Adjust the variable resis-
tors so that a playback
level of 200mV ±0.5dB is
obtained.
TAPE SPEED(HIGH)
TEST POINT
(B DECK)
R524
VR502
(A DECK)
VR501
Q404
R404
1KΩ
1KΩ
To be added
a 1kΩ.