Sony HCD-ED1A Service Manual

– 10 –
2. Mode : Playback
2. Mode: Playback
Confirm playback the signal recorded in step 1 become adjustment
level as follows.
If these levels do not adjustment level, adjustment the VR701 (L-
CH) and VR702 (R-CH) on the TAPE PREAMP board to repeat
steps 1 and 2.
Adjustment level : Playback output of 10kHz level diffrence
against 315Hz reference should be ±0.5 dB.
Adjustment Location : TAPE PREAMP board
Record Level Adjustment
Procedure :
1. Mode: Record
Confirm playback the signal recorded in step 1 become adjustment
level as follows.
If these levels do not adjustment level, adjustment the VR705 (L-
CH) and VR706 (R-CH) on the TAPE PREAMP board to repeat
steps 1 and 2.
Adjustment level :
Playback level : 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location : TAPE PREAMP board
Adjustment Location
[RELAY BOARD] (Component Side)
Record Bias Adjustment
Procedure :
1. Mode : Record
level mete
r
MD OUT (JK301)
set
recorded
position
AF OSC
attenuator
600 Ω
set
MD IN (JK301)
1) 315Hz
2) 10kHz
blank tape
CS-123
50 mV (–23.8 dB)
}
AF OSC
attenuator
600
Ω
set
MD IN (JK301)
315Hz 50 mV (–23.8 dB)
blank tape
CS-123
VR770
level mete
r
MD OUT (JK301)
set
recorded
position
VR704
VR703 VR706
VR705
VR701
VR702
IC703
1
21
22
42
[TAPE PREAMP BOARD] (Component Side)

Sony HCD-ED1A Specifications

General

Brand	Sony
Model	HCD-ED1A
Category	Stereo System
Language	English