JVC RC-BX33SL, Руководство по обслуживанию

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RC-BX33SL
Electrical Performance
ITEMS
Measurement
Measurement method
Standard Adjusting
conditions Values positions
Adjustment of * Mode: PB mode 1 With the recording and playback mechanism,
recording bias * Recording mode load the test tapes TDK-D60, and set the TDK-D60
current * Test tape: TDK-D60 mechanism to the recording and pausing 4.5 A
(Reference condition in advance . +/-0.5 A
Value) * Measurement output
terminal 2 After connecting 100ohms in series to the
:Both recording and recorder head, measure the bias current
headphone terminals with a valve voltmeter at both of the
terminals
Adjustment of * Reference frequency 1 with the recording and playback mechanism, Output
recording and :1KHz and 8KHz load the test tapes (TDK-D60) and set the deviation
playback (REF.:- 10dB) mechanism to the recording and pausing between
frequency * Test tape: TDK-D60 condition in advance. 1KHz and
characteristics
8KHz
* Measurement input 2 While repetitively inputting the reference :-1dB +/-2dB
terminal: OSC IN frequency signal of 1KHz and 8KHz from
OSC IN, record and playback the tape.
3 While receding and playback the test tape
Lch and Rch so that the output
deviation between 1KHz and 8KHz becomes
-1dB +/-2dB
Reference Values for Electrical Function Confirmation Items
Items
Measurement
Measurement method
Standard Adjusting]
conditions Values positions
Recording * Playback 1 While changing over to and form BIAS 1 62KHz T201
bias * Test tape: TDK-D60 and 2, confirm that the frequency is +/-6KHz
frequency changed
* Measurement 2 With the recording and playback
terminal : BIAS TP on mechanism, load the test tape.
P.C. board (TDK-D60 ) , 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 62KHz +/-6KHz
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