Sony MHC-S9D / TC-S9 Service Manual ▷ View online
11
TC-S9
Adjustable level:
MD OUT jack PB level: 47.2 to 53.0 mV (–27.3 to –26.3 dB)
Adjustment Location: MAIN board
MD OUT jack PB level: 47.2 to 53.0 mV (–27.3 to –26.3 dB)
Adjustment Location: MAIN board
[MAIN BOARD] (Component Side)
[LEAF SW BOARD] (Component Side)
REC Bias Adjustment
DECK B
Procedure:
1. Insert a tape into Deck B.
2. After press
1. Insert a tape into Deck B.
2. After press
[REC PAUSE/START]
button,
press
[REC PAUSE/START]
button, then recording start.
3. Mode: Record
4. Mode: Playback
5. Confirm the playback signal recorded in step 3 becomes ad-
justable level as follows.
If these levels are not adjustable level, adjust the RV304 (L-
CH) and RV354 (R-CH) on the MAIN board to repeat steps 4
and 5.
If these levels are not adjustable level, adjust the RV304 (L-
CH) and RV354 (R-CH) on the MAIN board to repeat steps 4
and 5.
Adjustable level: Playback output of 315 Hz to playback output
of 10 kHz:
±
1.0 dB
Adjustment Location: MAIN board
REC Level Adjustment
DECK B
Procedure:
1. Insert a tape into Deck B.
2. After press
1. Insert a tape into Deck B.
2. After press
[REC PAUSE/START]
button, press
[REC PAUSE/START]
button, then recording start.
3. Mode: Record
4. Mode: Playback
5. Confirm the play back signal recorded in step 3 becomes ad-
justable level as follows.
If these levels are not adjustable level, adjust the RV301 (L-
CH) and RV351 (R-CH) on the MAIN board to repeat steps 4
and 5.
If these levels are not adjustable level, adjust the RV301 (L-
CH) and RV351 (R-CH) on the MAIN board to repeat steps 4
and 5.
attenuator
set
MD/VIDEO (AUDIO) IN (J601): ST-S9
1) 315 Hz
2) 10 kHz
2) 10 kHz
50 mV (–23.8 dB)
600
Ω
blank tape
CS-123
CS-123
AF OSC
ST-S9
+
–
–
set
recorded
portion
portion
level meter
MD OUT jack
(J601)
(J601)
ST-S9
MD/VIDEO (AUDIO) IN (J601) : ST-S9
315 Hz, 50 mV (–23.8 dB)
315 Hz, 50 mV (–23.8 dB)
blank tape
CS-123
CS-123
attenuator
set
600
Ω
AF OSC
ST-S9
+
–
–
set
recorded
portion
portion
level meter
MD OUT jack
(J601)
(J601)
ST-S9
TAPE SPEED
RV1002
RV1001
(NORMAL) (HIGH)
CN1001
DECK A
PB LEVEL
(L-CH)
REC LEVEL
(R-CH)
DECK B
PB LEVEL
(L-CH)
REC LEVEL
(L-CH)
REC BIAS
(R-CH)
REC BIAS
(L-CH)
RV302
RV303
RV354
RV304
RV301
RV351
CN311
IC303
IC302
TC-S9
13
13
SECTION 7
DIAGRAMS
7-1.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Boards:
•
•
X
: parts extracted from the component side.
•
: Pattern from the side which enables seeing.
• Indication of transistor.
B
These are omitted.
C
E
Q
B
These are omitted.
C
E
Q
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
5
: fusible resistor.
•
C
: panel designation.
•
A
: B+ Line.
•
B
: B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : STOP
(
no mark : STOP
(
) : PB
〈〈
〉〉
: REC
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
E
: PB
a
: REC
• Abbreviation
TH
: Thai model
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
• Waveforms
– MAIN Board –
– MAIN Board –
1
T301
4
(DECK-B REC mode)
2
Q301, 303 (collector) (REC mode)
3
NO312
6
(L-REC),
3
(R-REC)
(DECK-B REC mode)
120 Vp-p
13
µ
s
10 Vp-p
13
µ
s
52 Vp-p
13
µ
s
• IC Block Diagram
– MAIN Board –
– MAIN Board –
IC302
µ
PC1330HA
1
2
3
4
5
6
7
8
9
INVERTER
COMPARATER
SW R1
GND
SW P1 CONT
GND
VCC
SW P2 GND
SW R2
• Circuit Boards Location
LEAF SW board
HEAD (A) board
HEAD (B) board
TC-SUB PANEL-A board
TC-SUB PANEL-B board
TC-PANEL-A DECK board
TC-PANEL-B DECK board
MAIN board
TC-S9
14
14
7-2.
SCHEMATIC DIAGRAM – MAIN Section (1/2) –
•
See page 13 for Waveforms.
•
See page 13 for IC Block Diagram.
(Page 18)
(Page 15)
TC-S9
15
15
7-3.
SCHEMATIC DIAGRAM – MAIN Section (2/2) –
(Page 14)
(Page 17)
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