HST-SE581, SEN-R4820, SEN-T481 - Sony Audio Service Manual (repair manual). Page 8

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Procedure:
1.

Mode:  Record

2.

Mode:  Playback

Confirm playback the signal recorded in step 1 become adjustable
limits as follows.
If these levels do not adjustable limits, adjustment the RV511 (L-
CH) and RV521 (R-CH) on the main board to repeat steps 1 and 2.
Adjustable limits:

VIDEO 1 AUDIO OUT level : 47.3 to 53.1 mV

(–24.3 to –23.3 dB)

Adjustment Location:  MAIN board

+
–

set

recorded
portion

level meter

rear panel

VIDEO1
AUDIO OUT connector
(L: L-CH)
(R: R-CH)

IC302

IC501

J101

J102

CN501

CN502

CN102

CN301

CN302

RV511
RECORD LEVEL
(L-CH)

RV521
RECORD LEVEL
(R-CH)

RV301
RV401

L
R

PB LEVEL

— DECK B —

— DECK A —

(NORMAL)

RV651

(HIGH)

RV652

PB

LEVEL

RV311

RV411

R

L

TAPE SPEED

R

L

RECORD

BAIS

RV441 RV341

set

VIDEO 1 IN connector (L: L-CH)

(R: R-CH)

315 Hz, 50 mV (–23.8 dB)

blank tape
CS-123

600 

Ω

attenuator

AF OSC

rear panel

[MAIN  BOARD] (Component Side)

[AUDIO  BOARD]  (Conductor Side)

Procedure:
1.

Mode:  Record

2.

Mode:  Playback

Confirm playback the signal recorded in step 1 become adjustable
limits as follows.
If these levels do not adjustable limits, adjustment the RV341 (L-
CH) and RV441 (R-CH) on the AUDIO board to repeat steps 1 and 2.
Adjustable limits: Playback output of 315 Hz to playback output

of 10 kHz:  ±0.5 dB

Adjustment Location: AUDIO board

+
–

set

recorded
portion

level meter

rear panel

VIDEO1
AUDIO OUT connector
(L: L-CH)
(R: R-CH)

attenuator

set

VIDEO 1 IN connector (L: L-CH)

(R: R-CH)

1) 315 Hz
2) 10 kHz

50 mV (–23.8 dB)







600 

Ω

blank tape
CS-123

AF OSC

rear panel