Sony HCD-H11 Service Manual page 12

Record Bias Adjustment DECK B
Procedure :
1. Record mode
AF OSC
600 Ω
attenuator
MD IN
1) 315 Hz
38.8mV (–26dB)
2) 10KHz
2. Playback mode
recorded
portion
set
3. Confirm playback the signal recorded in step 1 become
adjustment level as follows.
4. If these levels do not adjustment level, adjustment the RV341
(L-CH) and RV441 (R-CH) to repeat step 1 and 4.
Adjustment level :
Playback output of 315Hz to playback output of 10kHz : – 0.5dB to
0.5dB. (– 1.3 to 1.3mV)
Adjustment Location : AUDIO board .
Record Level Adjustment DECK B
Procedure :
1. Record mode
AF OSC
600
attenuator
MD IN
315Hz 38.8mV (–26dB)
2. Playback mode
recorded
portion
set
blank tape
CS-123
set
Level meter
+
–
MD OUT
blank tape
CS-123
Ω
set
Level meter
+
–
MD OUT
3. Confirm playback the signal recorded in step become
adjustment level as follows.
4. If these levels do not adjustment level, adjust the RV401 (L-CH)
and RV451 (R-CH) to repeat step 1 and 4.
Adjustment Level :
OUT PUT level : – 28dB ± 0.5dB (29.1 to 32.7mV)
Adjustment Location : MAIN board
Adjustment Location :
[ AUDIO BOARD ] – Component side –
RV301 : Playback Level (Deck B L-CH)
RV401 : Playback Level
(Deck B R-CH)
RV341 : Record Bias (L-CH)
RV441 : Record Bias (R-CH)
[ MAIN BOARD ] – Component side –
– 12 –
RV651 : Tape Speed (Normal)
RV652 : Tape Speed
(HIGH)
RV311 : Playback Level
(Deck A L-CH)
RV411 : Playback Level
(Deck A R-CH)
RV401 :
Record Level (L)
RV451 :
Record Level (R)