Sony HCD-D90AV / HCD-GR10AV / HCD-RX100AV / MHC-D90AV / MHC-GR10AV / MHC-RX100AV Service Manual ▷ View online
— 13 —
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads
pinch rollers
erase head
rubber belts
capstan
idlers
2. Demagnetize the record/playback head with a head demagne-
tizer.
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 sup-
ply voltage unless otherwise noted.
Torque Measurement
2 to 6 g • cm
(0.02 - 0.08 oz • inch)
36 to 61 g • cm
(0.5 - 0.84 oz • inch)
Torque
Torque meter
FWD
FWD
back tension
back tension
REV
FF/REW
REV
back tension
back tension
FWD tension
REV tension
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
2 to 6 g • cm
(0.02 - 0.08 oz • inch)
61 to 143 g • cm
(0.85 - 1.99 oz • inch)
100 g or more
(3.53 oz or more)
100 g or more
(3.53 oz or more)
SECTION 6
ELECTRICAL ADJUSTMENTS
DECK SECTION
0 dB=0.775V
1. Demagnetize the record/playback head with a head damagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
parts adjusted.
4. The adjustments should be performed with the rated power sup-
ply 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 adjust-
ment.)
should be completed before performing recording circuit adjust-
ment.)
6. The adjustments should be performed for both L-CH and R-CH.
7. Switches and controls should be set as follows unless otherwise
7. Switches and controls should be set as follows unless otherwise
specified.
Record/Playback Head Azimuth Adjustment
(Deck A, Deck B)
(Deck A, Deck B)
Note: Perform this adjustments for both decks.
Procedure:
1. Mode : Playback
1. Mode : Playback
set
test tape
P-4-A100
(10kHz, –10dB)
P-4-A100
(10kHz, –10dB)
main board
CN403
Pin
CN403
Pin
3
(L-CH)
Pin
1
(R-CH)
level meter
Signal
Used for
Tape
Azimuth Adjustment
Tape Speed Adjustment
Level Adjustment
10 kHz, –10 dB
3 kHz, 0 dB
315 Hz, 0 dB
P-4-A100
WS-48B
P-4-L300
SECTION 5
MECHANICAL ADJUSTMENTS
Meter reading
36 to 61 g • cm
(0.5 - 0.84 oz • inch)
–
+
main board
CN403
Pin
CN403
Pin
2
(GND)
— 14 —
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
Adjustment Location: Playback Head (Deck A)
Record/Playback/Erase Head (Deck B)
4 5 ˚
9 0 ˚
135˚
180˚
wrong
good
in phase
Waveform of oscilloscope
output
level
level
L-CH
peak
peak
screw
position
position
R-CH
peak
peak
within
1dB
1dB
within 1dB
L-CH
peak
peak
R-CH
peak
peak
screw
position
position
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 1 dB of peak.
that outputs match within 1 dB of peak.
3. Mode: Playback
R
set
test tape
P-4-A100
(10kHz, –10dB)
P-4-A100
(10kHz, –10dB)
main board
CN403
Pin
CN403
Pin
3
(L-CH)
oscilloscope
Pin
2
(GND)
L
Pin
1
(R-CH)
Tape Speed Adjustment (Deck A)
Note: Set the test mode using the following method and begin tape
speed adjustment.
In the test mode, the tape will move at double speed while
the HIGH SPEED DUBBING button is pressed.
In the test mode, the tape will move at double speed while
the HIGH SPEED DUBBING button is pressed.
Procedure:
With the power turned ON, press the SPECTRUM ANALYZER
button, ENTER/NEXT button, and EFFECT ON/OFF button
simultaneously.
(The “VOLUME” on the fluorescent display tube will blink while
in the test mode.)
To exit the test mode, press the POWER button.
With the power turned ON, press the SPECTRUM ANALYZER
button, ENTER/NEXT button, and EFFECT ON/OFF button
simultaneously.
(The “VOLUME” on the fluorescent display tube will blink while
in the test mode.)
To exit the test mode, press the POWER button.
1. Load WS-48B into deck A and a recordable tape into deck B.
2. Press the
2. Press the
r REC button, and press the · button of deck B to
set deck B into the recording state.
3. Play deck A.
4. While pressing the HIGH SPEED DUBBING button, set double
4. While pressing the HIGH SPEED DUBBING button, set double
speed play.
5. Adjust RV652 of the AUDIO board so that the reading of the
frequency counter becomes 6000 ± 30 Hz.
6. Release the HIGH SPEED DUBBING button to set normal
speed play.
7. Adjust RV651 of the AUDIO board so that the reading of the
frequency counter becomes 3000 ± 15 Hz.
Adjustment Location: AUDIO board
Playback Level Adjustment (Deck A, Deck B)
Procedure:
Mode: Playback
Mode: Playback
set
test tape P-4-L300
(315Hz, 0dB)
(315Hz, 0dB)
main board
CN403 Pin
CN403 Pin
3
(L-CH)
Pin
1
(R-CH)
level meter
Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301
(L-CH) and RV401 (R-CH)
so that adjustment within the following adjustment level.
(L-CH) and RV401 (R-CH)
so that adjustment within the following adjustment level.
Adjustment level:
CN403 playback level: 301.5 to 338.3 mV (–8.2 to –7.2 dB)
level difference between the channels: within ± 0.5 dB
Adjustment Location: AUDIO board
CN403 playback level: 301.5 to 338.3 mV (–8.2 to –7.2 dB)
level difference between the channels: within ± 0.5 dB
Adjustment Location: AUDIO board
foward
reverse
— 15 —
Record Bias Adjustment (Deck B)
Procedure:
INTRODUCTION
When set to the test mode performed in
When set to the test mode performed in
Tape Speed Adjust-
ment
,
when the tape is rewound after recording, the “REC memory
mode” which rewinds only the recorded portion and playback is
set.
This “REC memory mode” is convenient for performing this ad-
justment. During recording, the input signal FUNCTION will auto-
matically switch to VIDEO.
set.
This “REC memory mode” is convenient for performing this ad-
justment. During recording, the input signal FUNCTION will auto-
matically switch to VIDEO.
1. Press FUNCTION button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)
2. Load a tape into deck B, and press the
r REC button.
3. Mode: Record
set
VIDEO/MD (AUDIO) IN
1) 315Hz
2) 10kHz
1) 315Hz
2) 10kHz
} 50 mV (–23.8 dB)
AF OSC
attenuator
600
Ω
blank tape
CS-123
CS-123
recorded
position
position
main board
CN403 Pin
CN403 Pin
3
(L-CH)
Pin
1
(R-CH)
set
level meter
5. Confirm playback the signal recorded in step 2 become adjust-
ment level as follows.
If these levels do not adjustment level, adjust the RV341 (L-
CH) and RV441 (R-CH) on the AUDIO board to repeat steps 3
and 4.
If these levels do not adjustment level, adjust the RV341 (L-
CH) and RV441 (R-CH) on the AUDIO board to repeat steps 3
and 4.
Adjustment level: The playback output of 10 kHz level difference
against 315 Hz reference should be ± 1.0 dB.
Adjustment Location: AUDIO board
RV341(Lch),RV441(Rch)
Record Bias
Record Bias
RV301
RV401
RV441 RV341
RV301(Lch),RV401(Rch)
Playback Level (Deck B)
Playback Level (Deck B)
RV651 (Normal Speed)
RV652 (High Speed)
Tape Speed
RV652 (High Speed)
Tape Speed
RV652
RV651
RV311
RV411
RV311(Lch),RV411(Rch)
Playback Level (Deck A)
Playback Level (Deck A)
Record Level Adjustment (Deck B)
Procedure:
INTRODUCTION
When set to the test mode performed in
When set to the test mode performed in
Tape Speed Adjust-
ment
, when the tape is rewound after recording, the “REC memory
mode” which rewinds only the recorded portion and playback is
set.
This “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will
automatically switch to VIDEO.
set.
This “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will
automatically switch to VIDEO.
1. Press FUNCTION button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)
2. Load a tape into deck B, and press the
r REC button.
3. Mode: Record
VIDEO/MD (AUDIO) IN
315 Hz 50 mV (–23.8 dB)
315 Hz 50 mV (–23.8 dB)
set
blank tape
CS-123
CS-123
600
Ω
attenuator
AF OSC
4. Mode: Playback
level meter
set
main board
CN403
CN403
Pin
3
(L-CH)
Pin
1
(R-CH)
recorded
position
position
5. Confirm playback the signal recorded in step 2 become adjust-
ment level as follows.
If these levels do not adjustment level, adjust the RV301 (L-
CH) and RV351 (R-CH) on the MAIN board to repeat steps 3
and 4.
If these levels do not adjustment level, adjust the RV301 (L-
CH) and RV351 (R-CH) on the MAIN board to repeat steps 3
and 4.
Adjustment level:
CN403 playback level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
CN403 playback level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board
Adjustment Location
[AUDIO BOARD] (Conductor Side)
[AUDIO BOARD] (Conductor Side)
RV301
Record Level (L CH)
Record Level (L CH)
IC401
RV351
Record Level
(R CH)
Record Level
(R CH)
CN403
1
3
[MAIN BOARD] (Component Side)
4. Mode: Playback
— 16 —
Band: FM
Procedure:
1. Supply a 25 dB or 23 dB 98 MHz signal from the ANTENNA
Procedure:
1. Supply a 25 dB or 23 dB 98 MHz signal from the ANTENNA
terminal.
2. Tune the set to 98 MHz.
3. Adjust RV42 to the point (moment) when the TUNED indicator
3. Adjust RV42 to the point (moment) when the TUNED indicator
will change from going off to going on.
Adjustment Location: TCB board
TUNER SECTION
0dB=1µV
Note 1:
As a front-end (FE1) is difficult to repair if faulty, replace
it with new one.
it with new one.
Note 2:
No adjustment is needed due to a tuner pack for except
AEP, UK, German, East European, CIS models.
AEP, UK, German, East European, CIS models.
AM Tuned Level Adjustment
Note: FM Tuned Level adjustment should be performed after this
AM Tuned Level Adjustment.
Setting:
Band: MW
Band: MW
Procedure:
1. Set the output of SSG so that the input level of the set becomes
1. Set the output of SSG so that the input level of the set becomes
55 dB or 58 dB. (55 dB: Except East European, CIS model, 58
dB: East European, CIS model)
dB: East European, CIS model)
2. Tune the set to 999 kHz or 1,050 kHz.
3. Adjust RV41 to the point (moment) when the TUNED indicator
3. Adjust RV41 to the point (moment) when the TUNED indicator
will change from going off to going on.
Adjustment Location: TCB board
FM Tuned Level Adjustment
Note: This adjustment should be performed after the AM Tuned
Level Adjustment.
Setting:
set
Carrier frequency: 98MHz
Modulation:
Modulation:
AUDIO 1kHz, 75kHz
deviation (100%)
deviation (100%)
Output level:
25dB (at 75
Ω
open) (Except East European, CIS model)
23dB (at 75
Ω
open) (East European, CIS model)
FM RF SSG
loop antenna
Field strength dB (µV/m) = SSG output level dB (µV/m) –26dB.
AM RF SSG
30% amplitude
modulation by
400Hz signal
modulation by
400Hz signal
60cm
AM antenna
terminal (TM1)
terminal (TM1)
loop antenna
(Supplied accessories)
(Supplied accessories)
Modulation: 999 kHz (at 9 kHz step)
1,050 kHz (at 10 kHz step)
set
Adjustment Location
[TCB BOARD] (Component Side)
[TCB BOARD] (Component Side)
TM1
IC21
RV41
AM Tuned Level
AM Tuned Level
RV42
FM Tuned
Level
75
Ω
coaxial
FM ANTENNA terminal (TM1)
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