8
TCM-230DV
SECTION 5
ELECTRICAL ADJUSTMENTS
TAPE SPEED ADJUSTMENT
Mode: playback
Procedure:
– Normal Speed –
1. Set
[REC TIME]
switch (S601) to NORMAL (4.8 cm/s) position,
and playback the tape (WS-48A) .
2. Adjust RV601 so that frequency counter reading becomes 3,040
Hz.
Specification values: 3,030 to 3,050 Hz
– Double Speed –
3. Set
[REC TIME]
switch (S601) to DOUBLE (2.4 cm/s) position.
4. Playback the tape (WS-48A) from the beginning for two
minutes, then adjust RV602 so that frequency counter reading
becomes 1,540 Hz.
Specification values: 1,535 to 1,545 Hz
Confirm that deflection of the frequency counter reading between
the beginning and the end of tape is within 1% (NORMAL: approx.
30.4 Hz, DOUBLE: approx. 15.4 Hz) .
Adjustment Location:
– MAIN BOARD (Conductor Side) –
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
Mode: playback
Procedure:
1. Turn the adjustment screw to obtain the maximum reading on
level meter.
Note:
Several peaks may appear, but take the maximum.
2. After the adjustment, lock the adjustment screw with suitable
locking compound.
Adjustment Location:
level meter
test tape
P-4-A063
(6.3 kHz, –10 dB)
16
Ω
set
EAR jack (J103)
+
–
frequency
counter
test tape
WS-48A
(3 kHz, 0 dB)
16
Ω
EAR jack (J103)
set
+
–
SETTING:
• Supplied voltage: 2.5 V
• Switch and control position
[VOL ]
control (RV101)
: mechanical center
[PAUSE ]
switch (S301) : OFF
[SPEED CONTROL]
(RV603): center click
[VOR]
switch (S501)
: OFF
TEST TAPE
Type
Signal
Used for
P-4-A063
6.3 kHz, –10 dB
Head Azimuth Adjustment
WS-48A
3 kHz, 0 dB
Tape Speed Adjustment
0 dB=0.775 V
w
.
adjustment screw
J102
RV601
Tape Speed Adjustment
(Normal Speed)
RV602
Tape Speed Adjustment
(Double Speed)
J103
