Electrical Performance
Measurement Standard Adjusting
conditions Values positions
Adjustment of Mode:Forward or 1 With the recording and playback
recording bias reverse mode mechanism, load thd test tapes
current Recording mode TDK-60 , and set the mechanism to the recording 4.5 A
(Reference Test tape and pausing condition in advance . +/-0.5 A
Value) TDK-60
Measurement output 2 After connecting 100 in series to the
termial recorder head, measure the bias current
:Both recording and with a valve voltmeter at both of the
headphone terminals terminals
Adjustment of Reference frequency 1 with the recording and playback Output
recording and :1KHz and 8KHz mechanism, load the test tapes (TDK-60) deviation
playback (REF.:-20dB) and set the mechanism to the between
frequency Test tape recording and pausing condition in 1KHz and
characteristics TDK-60 advance 8KHz
Measurement input 2 While repetitively inputting the reference :-1dB +/-2dB
terminal frequency signal of 1KHz and 10KHz from
:OSC IN OSC IN, record and playback the tape.
Reference Values for Electrical Function Confirmation Items
Measurement Standard Adjusting
conditions Values positions
Recording Forward or reverse 1 While changing over to and form BIAS 1 61KHz
bias Test tape and 2, confirm that the frequency is +/-1KHz
frequency TDK-60 changed
Measurement 2 With the recording and playback
terminal : BIAS TP on mechanism, load the test tape.
P.C. board (TDK-60 ) , and set the
mechanism to the recording and pausing
condition in advance.
3 Confirm that the BIAS TP frequency on the
P.C. board is 61KHz +/-1KHz
ITEMS Measrrnment methed
Items Measrrnment methed
PC-X250
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