HCD-DP900D, MHC-DP900D - Sony Audio Service Manual (repair manual). Page 18

18

Procedure:
INTRODUCTION
When set to the test mode performed in Tape Speed Adjustment,
when the tape is rewound after recording, the “REC memory mode”
which rewinds only the recorded portion and playback is set.
This  “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will
automatically switch to VIDEO.
(If do not operation of stopped from recording complete, and rotette
of shuttle knob then rewind to recording start position.)

1. Press  MD (VIDEO)  button to select VIDEO. (This step is not

necessary if the above test mode has already been set.)

2. Insert a tape into deck B.
3. After press  REC PAUSE/START  button, press REC PAUSE/

START button, then recording start.

4. Mode:  Record

5. Mode:  Playback

6. Confirm playback the signal recorded in step 3 become

adjustable level as follows.
If these levels do not adjustable level, adjustment the RV304
(L-CH) and RV354 (R-CH) on the AUDIO board to repeat steps
4 and 5.

Adjustable level: Playback output of 315 Hz to playback output

of 10 kHz:  0

±0.5 dB

Adjustment Location:  MAIN board

Procedure:
INTRODUCTION
When set to the test mode performed in Tape Speed Adjustment,
when the tape is rewound after recording, the “REC memory mode”
which rewinds only the recorded portion and playback is set.
This  “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will
automatically switch to VIDEO.
(If do not operation of stopped from recording complete, and rotate
of shuttle knob then rewind to recording start position.)

1. Press  MD (VIDEO)   button to select VIDEO. (This step is not

necessary if the above test mode has already been set.)

2. Insert a tape into deck B.
3. After press  REC PAUSE/START  button, press REC PAUSE/

START button, then recording start.







Ω

CN301 (Pin 3 : L-CH)

(Pin 1 : R-CH)

Note: Start the Tape Speed adjustment as below after setting to the test

mode.
In the test mode, the tape speed is high during pressing

 CD SYNC HI-DUB 

 button.

Procedure:
1. Turn the power switch on.
2. Press  x button,  DISPLAY  button and  DISC 3  button

simultaneously.
(Cursor segment flash on the FL display tube.)
To exit from the test mode, press ?/1 button.

Mode:  Playback

1. Insert the WS-48B into the deck B.
2. Press Y button on the deck B.
3. Press  CD SYNC HI-DUB  button in playback mode.

Then at HIGH speed mode.

4. Adjust RV1001 on the LEAF SW board do that frequency

counter reads 6,000 

± 180 Hz.

5. Press  CD SYNC HI-DUB  button.

Then back to NORMAL speed mode.

6. Adjust RV1002 on the LEAF SW board so that frequency

counter reads 3,000 

± 90 Hz.

Adjustment Location:  LEAF SW board

Procedure:
Mode:  Playback

Deck A is RV302 (L-CH), Deck B is RV303 (L-CH) so that
adjustment within adjustment level as follows.
Adjustment Level:

CN301 PB level:  334 to 375 mV (–6.8 dB 

± 0.5 dB) level

difference between the channels:  within 

±0.5 dB

Adjustment Location:  MAIN board

Sample Volue of Wow and Flutter: 0.3% or less W. RMS

  (WS-48B)

main board
CN301 (Pin 3 : L-CH)

(Pin 1 : R-CH)

main board
CN301 (Pin 3 : L-CH)

(Pin 1 : R-CH)