HCD-CL1/CL3
3. Mode: PlaybackRecord Bias Adjustment
test tape
P-4-A100main boardProcedure:
(10kHz, �10dB)CN301
Pin 1 (L-ch)oscilloscopeINTRODUCTION
Pin 2 (GND)When set to the test mode perfTape Speed Adjust-ormed in
Lment, when the tape is rewound after rOREC memoryecording, the
mode� which rewinds only the recorded portion and playback is
set
Rset.
This OREC memory mode� is convenient for performing this ad-
justment. During recording, the input signal FUNCTION will auto-
matically switch to VIDEO.
Pin 3 (R-ch)
(After recording, press the m button without stopping will re-
turn to the position where recording was started.)
Waveform of oscilloscope
1. Press FUNCTION button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)
2. Insert a tape into deck, press the TAPE REC PAUSE/START
in phase45°90°135°180°
button, and then press the Y button to start recording.
goodwrong
3. Mode: Record
VIDEO (AUDIO) IN
4. After the adjustments, apply suitable locking compound to the1) 315 Hz} 50 mV (�23.8 dB)
2) 10 kHz
parts adjusted.
AF OSC
blank tape
Adjustment Location: Record/Playback/Erase Head600 &CS-123
attenuator
set
Tape Speed Check
Note: Set the test mode using the following method and begin tape
speed adjustment.4. Mode: Playback
Procedure:recordedlevel meter
With the power turned ON, press the x button, ENTER/YESposition
button, and DISC 3 button simultaneously.
(The OVOLUME � on the fluorescent display tube will blink whileset
in the test mode.)
main board
To exit the test mode, press the "/1 button.CN301
Pin 3 (L-ch)
Pin 1 (R-ch)
1. Insert the WS-48B into deck.
2. Press the Y button of deck.
5. Confirm playback the signal recorded in step 2 become adjust-
3. Check the reading of frequency counter becomes 3000 ? 15 Hz.
ment level as follows.
If these levels do not adjustment level, adjust the RV304 (L-CH)
Sample Value of Wow and flutter
and RV354 (R-CH) on the TC board to repeat steps 3 and 4.
W.RMS (JIS) less than 0.3%
(test tape: WS-48B)
Adjustment level: The playback output of 10 kHz level difference
against 315 Hz reference should be 0 ? 0.5 dB.
Adjustment Location:
[TC BOARD]
RV304 RV354
RV304(Lch),RV354(Rch)
Record Bias
18 |
ACEC
