HCD-ZX70DVD - Sony Audio Service Manual (repair manual). Page 19

19

INTRODUCTION
When set to the test mode performed in 

, 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 au-
tomatically switch to VIDEO.
(After recording, press the  m  button without stopping will re-
turn to the position where recording was started)

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 B, press the  REC PAUSE/START  button,

and then press the  N  button of deck B to start recording.

3. Mode: Record

4. Mode: Playback

5. Confirm playback the signal recorded in step 2 become adjust-

ment level as follows.
If these levels do not adjustment level, adjust the RV301 (L-CH)
and RV351 (R-CH) on the MAIN board to repeat steps 3 and 4.

Adjustment level:
CN301 playback level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)

Adjustment Location: MAIN board

AF OSC

VIDEO (AUDIO) IN
315Hz 50 mV (–23.8 dB)

Blank tape
CS-123

Set

Attenuator

600 

Ω

Recorded
position

Level meter

Set

MAIN board
CN301 

1

 (L-CH),

CN301 

3

 (R-CH)

+

–

3 1

CN301

RV301
Record level (L ch)

IC301

RV351
Record level (R ch)

RV441 RV341

RV301(Lch),RV401(Rch)
Playback Level (Deck B)

RV301 RV401

RV341(Lch),RV441(Rch)
Record Bias

RV311(Lch),RV411(Rch)
Playback Level (Deck A)

RV311

RV411