Sony MHC-D7 - Page 13

Record Bias Adjustment
Procedure :
1. Record mode
AF OSC 1) 315Hz
21.8mV ( — 31dB) blank tape
2) 10kKHZ CS-123
attenuator 47K Q
oo
o—o O
{lL ooo | —
oo
[ ee |
Input point (see page 9)
2. Playback mode
recorded
portion
Output level measurement point
(see page 9)
3. Confirm playback the signal recorded in step 1 become
adjustment level as follows.
4. If these levels do not adjustment level, adjust 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 ( — 1.3 to 1.3mV).
Adjustment Location : AUDIO board.
Record Level Adjustment
FUNCTION button : CD
Procedure :
1. Record mode
blank tape
21.8mV ( - 31dB) 05:99
AF OSC
attenuator
3) eee
o—o o
Ilooo |
[ ne |
input point (see page 9)
2. Playback mode
recorded
portion
Output level measurement point
(see page 9)
3. Confirm playback the signal recorded in step 1 become
adjustment level as follows.
4. If these levels do not adjustment level, adjust the RV301
(L-CH) and RV351 (R-CH) to repeat step 1 and 4.
Adjustment Level :
OUT PUT level : — 26dB + 0.5dB (36.7 to 41.1mV)
Adjustment Location : MAIN board
Adjustment Location
[AUDIO BOARD] — Component side —
RV301 : Playback Level (Deck B L-CH)
RV401 : Playback Level
(Deck B R-CH)
RV65! :; Tape Speed (Normal
RV652 : Tape Speed
(High)
RV311: Playback Level
RV341 : Record Blas (L-CH) (Deck A L-CH)
RV441 : Record Bias (R-CH)
RV411 ; Playback Level
(Deck A R-CH)
[MAIN BOARD] — Component side —
RV351 : Record Level (R)
Output level measurement point
Input point
Ot : Record Level (L)