Sony MHC-5500 - Page 25

Record Bias Adjustment !DECK BI
Setting :
REC LEVEL control : standard record (See page 3.)
Connect TP 1 to ground.
Procedure :
1. Mode : record
AF OSC
~ attenuator
11 ooo 1
~
aet
___ ....,.,~--'•
2. Mode: playback
recorded
portion
600Q
LINE IN
l)
315
Hi } 31 V (-28dB)
2) lOKHz m
set
UNE OUT
blank tape
CS-122
VTVM
RV62
REC Bias
(R-CH)
RV42
REC Bias
(L-CH)
Confirm that the lOkHz playback output is 0±0.5dB relative
to the 315Hz output. If necessary, adjust RV42 (L-CH), RV62
(R-CH)
and repeat the steps given above.
After the ajustment remove jumper wire of TPl.
Adjustment Location : MD B board
Record Level Adjustment I DECK BI
Setting :
REC LEVEL control : standard record (Seepage 3.)
Connect TPl to ground.
Procedure :
1. Mode : record
AF OSC
~::·::::
2. Mode: playback
recorded
portion
set
blank tape
CS-122
VTVM
3. Play back the signal recorded in step 1.
Confirm that the signal level is within the specification
below.
If necessary, adjust RV101 (L-CH), RV201 (R-CH)
and repeat the stepl-3.
4. After the adjustment, remove jumper wire of TPl.
LINE OUT level: -30±0.5dB (23 to 26nV)
Adjustment Location : audio (B) board
-Adjusting Parts Location Diagram -
0
1
RV61 1
(R-CH) 1
PB Level
1
1 -
RV41
1
uc
(L-CH) ..,'~----.--
PB Level
AUDIO (B) BOARD
-Component Side-
IC302
----1 RV201
(R-CH)
RVlOl
(L-CH)
REC
Level
-5-
TC-HSOO
Motor
(
Deck A :
Ml lA)
Deck B: MllB
Normal Speed
semi·fixed variable
resister (L)
High Speed
semi-fixed variable
resister
(H)
Deck A: MD-A board
Deck
B: MD-B board
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