4-4
CCP-1100SF
4-2-3. Frequency characteristics adjustment
Test equipment : Level meter
Test tape 315 Hz (P-4-L300)
6.3 kHz (P-4-A063)
10 kHz (P-4-A100-2)
Note : Before this adjustment, playback level adjustment must has been
finished.
[315 Hz]
1.
Insert the test tape (P-4-L300) on the original side,
then press the COPY button and measure the playback
output level.
[6.3 kHz]
2.
Insert the test tape (P-4-A063) on the original side,
then press the COPY button and measure the playback
output level.
[10 kHz]
3.
Insert the test tape (P-4-A100-2) on the original side,
then press the COPY button and measure the playback
output level.
4.
If the playback output level is out of specification,
replace the following parts, and repeat this adjustment.
CH
Level meter connection
P-4-A063
P-4-A100-2
+
+
+
+
+
terminal
_
_
_
_
_
terminal
6.3 kHz
100 kHz
CH-1
TP5
E7
R4
R1, C1
CH-2
TP6
E7
R24
R21, C21
Note : Larger value raises the level.
4-2-4. Bias frequency adjustment
Test equipment :
Frequency counter
Coil (10 mH)
Adjustment point : T1/AU-2 board
Procedure :
1.
Connect the coil to the frequency counter.
2.
Set the SIDE selector to “A
+
B”.
3.
Activate the service mode. (Don't insert a cassette tape.)
4.
Press the COPY button, and after 30 seconds, approach
the coil to erase head.
5.
Adjust the following bias transformer (T1 on the AU-2
board) so that the bias frequency is in specification.
Specification : 550 kHz
±
3 %
R1
R21
C1
R4
R24
C21
AU-2 Board Component Side
+
2 dB
_
2 dB
_
6 dB
315 Hz
6.3 KHz
10 KHz
Frequency Counter
Coil
Erase Head
AU-2 Board Component Side
T1
