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9-4. PLL adjustment
[Checkpoints]
Test pad VCO1.
[Procedure]
(1) Connect the f counter to the test pad (VCO1).
(2) Relay the test tape TY-7551.
(3) Adjust VR4 so that the value of the f counter is 9.7 + 0.02 MHz.
9-5. REC Level
[Checkpoints]
.
Oscilloscope Channel 1 — Test pad PBO
Oscilloscope's External Trigger — Test pad PG
[Adjusting Method]
(1) Adjust VR5 so that the voltmeter shows 2.4 V at pin 39 of HA12109 tentatively when blank tape
is recorded.
(2) Playback test tape TY-7551.
(3) Observe waveforms of the followings and check the voltage levels f4 of A and B heads.
130KHz
Check Signal
130KHz Check Signal
1.5MHz
4.5MHz
(4) Set test tape TY-30B and record no.sound for about 2 min. (Be Sure to use non recorded section
of the tape)
(5) Adjust VR5 so that the recorded signals f4 of the two test tapes are the same level.
(6) When making this adjustment, check the interchangeability of the tapes.
is it possible for this DAT to correctly record data, etc. on tape which was used with any other
brand DAT?
(Is rewriting possible?)
is it possible for other brand DAT to correctly record data, etc., using a tape which was used with
this DAT?
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