Sony HCD-RXD2 / MHC-RXD2 Service Manual ▷ View online
— 9 —
1
Two screws (+KTP 3
×
8)
2
Screw (+PTPWH 3
×
8)
3
UD-gear
4
Screw (+PTPWH 2.6
×
8)
5
UD-cam
6
Spring
7
Spring
8
Spring
9
Base unit
1
Remove the cassette lids in the direction of arrow.
Four claws
Four claws
2-8. BASE UNIT
2-9. CASSETTE LID (L) / (R)
— 10 —
SECTION 3
TEST MODE
Function Key combination Description
Initialization
STOP + POWER OFF All preset data is re-set to the initial
(default) value.
(default) value.
Model display
STOP + DISC 1 Mode name is displayed.
Destination display
STOP + DISC 2 Destination is displayed.
Version display
STOP + DISC 3 Version number of the
microprocessor is displayed.
microprocessor is displayed.
CD aging mode
STOP + DISC SKIP/EX-CHANGE Set discs to DISC 1 and DISC
3. The following operations are repeated when aging
starts:
1. DISC 1: TOC Read
2. Plays back the last music of the DISC 1
3. DISC 3 : TOC Read
4. Plays back the last music of the DISC 3.
5. STOP
6. Tray is open and closed.
3. The following operations are repeated when aging
starts:
1. DISC 1: TOC Read
2. Plays back the last music of the DISC 1
3. DISC 3 : TOC Read
4. Plays back the last music of the DISC 3.
5. STOP
6. Tray is open and closed.
TAPE aging mode
STOP + PLAY A Insert a commercially available cassette tape (10
min.) to the decks A and B. When aging starts, each tape is rewound
and the following
operations are repeated:
1. TAPE A: FWD PLAY for one minute
2. TAPE A: FWD STOP for one second
3. TAPE A: FWD PLAY for three minutes
4. TAPE A: FWD FF to tape end
5. TAPE B: FWD PLAY for one minute
6. TAPE B: FWD REC PAUSE for one second
7. TAPE B: FWD REC for three minutes
8. TAPE B: FWD FF to tape end
9. TAPE B: REV PLAY for one minute
10. TAPE B: REV REC PAUSE for one second
11. TAPE B: REV REC for three minutes
12. TAPE B: REV FF to tape end.
min.) to the decks A and B. When aging starts, each tape is rewound
and the following
operations are repeated:
1. TAPE A: FWD PLAY for one minute
2. TAPE A: FWD STOP for one second
3. TAPE A: FWD PLAY for three minutes
4. TAPE A: FWD FF to tape end
5. TAPE B: FWD PLAY for one minute
6. TAPE B: FWD REC PAUSE for one second
7. TAPE B: FWD REC for three minutes
8. TAPE B: FWD FF to tape end
9. TAPE B: REV PLAY for one minute
10. TAPE B: REV REC PAUSE for one second
11. TAPE B: REV REC for three minutes
12. TAPE B: REV FF to tape end.
CD service mode
STOP + OPEN/CLOSE The message “CD S - -” is displayed on the
screen. The sled is moved to the outer circumference
while the FF button is pressed. Also, the SLED is moved to the
inner
circumference while the REW button is pressed. After pressing the
PLAY
button, FOCUS is turned ON, CLV-S is set, TRACKING and SLED
servos
are turned OFF and ADDRESS 3 = 3F, 37 is set.
screen. The sled is moved to the outer circumference
while the FF button is pressed. Also, the SLED is moved to the
inner
circumference while the REW button is pressed. After pressing the
PLAY
button, FOCUS is turned ON, CLV-S is set, TRACKING and SLED
servos
are turned OFF and ADDRESS 3 = 3F, 37 is set.
Display
STOP + DBFB All displays are turned ON.
Balance adjustment value
STOP + DISPLAY/DEMO The balance adjustment value is
displayed.
displayed.
Key check
STOP + FILE SELECT Function of the pressed key is displayed.
— 11 —
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback head
record/playback head
pinch rollers
erase head
rubber belts
capstan
idlers
2. Demagnetize the record/playback head with a head
demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
Torque Measurement
SECTION 4
MECHANICAL ADJUSTMENTS
Meter reading
40 to 70 g • cm
(0.56 - 0.97 oz • inch)
1 to 5 g • cm
(0.01 - 0.07 oz • inch)
55 to 140 g • cm
(0.76 - 1.94 oz • inch)
Torque
FWD
FWD
back tension
FF/REW
Torque meter
CQ-102C
CQ-102C
CQ-201B
SECTION 5
ELECTRICAL ADJUSTMENTS
1.
Demagnetize the record/playback head with a head
demagnetizer.
demagnetizer.
2.
Do not use a magnetized screwdriver for the adjustments.
3.
After the adjustments, apply suitable locking compound to the
parts adjusted.
parts adjusted.
4.
The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
supply voltage unless otherwise noted.
5.
The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit
adjustment.)
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit
adjustment.)
6.
The adjustments should be performed for both L-CH and R-
CH.
CH.
Record/Playback Head Azimuth Adjustment
(Deck A, Deck B)
(Deck A, Deck B)
Note: Perform this adjustments for both decks.
Procedure:
1.
1.
Mode : Playback
2.
Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 2 dB of peak.
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 2 dB of peak.
DECK SECTION
0 dB=0.775V
Tape
P-4-A100
WS-48B
Signal
10 kHz, –10 dB
3 kHz, 0 dB
Used for
Azimuth Adjustment
Tape Speed Adjustment
test tape
P-4-A100
(10kHz, –10dB)
P-4-A100
(10kHz, –10dB)
set
SPEAKER
terminal (JK501)
terminal (JK501)
level meter
L-CH
peak
peak
R-CH
peak
peak
screw
position
position
output
level
level
within
2dB
2dB
L-CH
peak
peak
R-CH
peak
peak
screw
position
position
within 2dB
— 12 —
3.
Mode: Playback
4.
After the adjustments, apply suitable locking compound to the
parts adjusted.
parts adjusted.
Adjustment Location:
Remove the cassette lid before adjustment (See page 9)
Remove the cassette lid before adjustment (See page 9)
Tape Speed Adjustment (Deck A)
Procedure:
1.
1.
Mode: Playback
2.
Adjust the SFR251 so that the frequency counter reads 3,000
Hz ± 90Hz.
Hz ± 90Hz.
Adjustment Location: MAIN board
Sample Value of Wow and flutter
W. RMS (JIS) within 0.3%
(test tape: WS-48B)
(test tape: WS-48B)
[MAIN BOARD] — Component side —
test tape
P-4-A100
(10kHz, –10dB)
P-4-A100
(10kHz, –10dB)
SPEAKER
terminal (JK501)
(L-CH)
terminal (JK501)
(L-CH)
SPEAKER
terminal (JK501)
(R-CH)
terminal (JK501)
(R-CH)
oscilloscope
L
R
Waveform of oscilloscope
in phase
45˚
90˚
135˚
180˚
good
wrong
Adjustment screws
REC/PB head (deck B)
or PB head (deck A)
REC/PB head (deck B)
or PB head (deck A)
test tape
WS-48B
(3kHz, 0dB)
WS-48B
(3kHz, 0dB)
set
SPEAKER
terminal (JK501)
terminal (JK501)
frequency counter
+
–
–
Tape Speed
CN251
CN601
SFR251
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