TCM-400DV
6
SECTION 4
ELECTRICAL ADJUSTMENTS
Tape Speed Adjustment
Mode: playback
Procedure:
1. Set
[REC˚TIME]
switch (S902) to NORMAL (4.8 cm/s) posi-
tion, and playback the tape (WS-48A) .
2. Adjust RV601 so that frequency counter reading becomes 3,000
Hz.
Specification values: 2,990 to 3,010 Hz
3. Set
[REC˚TIME]
switch (S902) to DOUBLE (2.4 cm/s) posi-
tion.
4. Playback the tape from the beginning for two minutes, then
adjust RV602 so that frequency counter reading becomes 1,500
Hz.
Specification values: 1,495 to 1,505 Hz
Confirm that deflection of the frequency counter reading between
the beginning and the end of tape is within 2% (NORMAL: approx.
60 Hz, DOUBLE: approx. 30 Hz) .
Setting:
• Supplied voltage: 2.5 V
• Switch and control position
VOL contorl (RV101)
: mechanical center
PAUSE switch (S601)
: OFF
SPEED CONTROL (RV603) : center click
VOR switch (S901)
: OFF
Test Tape
0 dB=0.775 V
Type
Signal
Used for
WS-48A
3 kHz, 0 dB
tape speed adjustment
frequency
counter
test tape
WS-48A
(3 kHz, 0 dB)
32
Ω
EAR jack (J101)
set
+
–
RV602
Tape Speed Adjustment
(Double Speed)
RV601
Tape Speed Adjustment
(Normal Speed)
Adjustment Location:
– MAIN BOARD (Conductor Side) –
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