Sony HCD-M100 / HCD-M300AV Service Manual ▷ View online
17
3. The tape A runs in fast forward. After two minutes of fast
forward, or at the shut-off point, the tape is stopped and the
aging mode advances to the next step.
The message: TAPE A AG-3 appears.
aging mode advances to the next step.
The message: TAPE A AG-3 appears.
4. The tape A is played back in the RVS mode. After two minutes
of the RVS playback, the aging mode advances to the next step.
The message: TAPE A AG-4 appears.
The message: TAPE A AG-4 appears.
5. The tape A is rewound and stops at the shut-off. The aging
mode advances to the next step.
The message: TAPE A AG-5 appears.
The message: TAPE A AG-5 appears.
6. The tape B is played back in the FWD mode. After two minutes
of the FWD playback, the aging mode advances to the next
step.
The message: TAPE B AG-2 appears.
step.
The message: TAPE B AG-2 appears.
7. The tape B runs in fast forward. After two minutes of fast
forward, or at the shut-off point, the tape is stopped and the
aging mode advances to the next step.
The message: TAPE B AG-3 appears.
aging mode advances to the next step.
The message: TAPE B AG-3 appears.
8. The tape B is played back in the RVS mode. After two minutes
of the RVS playback, the aging mode advances to the next step.
The message: TAPE B AG-4 appears.
The message: TAPE B AG-4 appears.
9. The tape B is rewound and stops at the shut-off. The aging
mode advances to the next step.
The message: TAPE B AG-5 appears.
The message: TAPE B AG-5 appears.
[AM TUNER STEP 9 kHz/10 kHz Selection Mode]
*
*
Either the 9 kHz step or 10 kHz step can be selected for the AM
channel step.
channel step.
Procedure:
1. Turn on the power and select TUNER using the FUNCTION
1. Turn on the power and select TUNER using the FUNCTION
button.
2. Select AM with the TUNER/BAND button and turn off the
power.
3. Press the two buttons ENTER and @/1 at the same time. The
main power is turned on and the other frequency step of the
previous mode is selected and displayed. “AM 9 k STEP” or
“AM 10 k STEP”
previous mode is selected and displayed. “AM 9 k STEP” or
“AM 10 k STEP”
[CD SRAM Test Mode]
Procedure:
1. Turn on the power and select CD using the FUNCTION button.
2. Press the three buttons x , ENTER and DBFB at the same
1. Turn on the power and select CD using the FUNCTION button.
2. Press the three buttons x , ENTER and DBFB at the same
time.
3. The message “SRAM OK” appears on the fluorescent indicator
tube.
[GC VACS ON/OFF Mode]
Procedure:
1. Press the two buttons DELETE and @/1 at the same time.
2. The message “VACS ON” or “VACS OFF” appears on the
1. Press the two buttons DELETE and @/1 at the same time.
2. The message “VACS ON” or “VACS OFF” appears on the
fluorescent indicator tube.
18
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
6.96 N • m to 14.02 N • m
71 to 143 g • cm
(0.98 – 1.99 oz • inch)
9.80 N • m
100 g or more
(3.53 oz or more)
9.80 N • m
100 g or more
(3.53 oz or more)
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
SECTION 4
MECHANICAL ADJUSTMENT
• TAPE MECHANISM DECK SECTION
• Torque Measurement
• CD MECHANISM DECK SECTION
To adjust the mechanism section, enter the mechanism section adjustment mode.
For how to enter the mechanism section adjustment mode, refer to each adjustment section.
For how to enter the mechanism section adjustment mode, refer to each adjustment section.
DISC SENSOR ALIGNMENT
1. Make sure that there is no disc in the unit.
2. Connect an oscilloscope to IC401rs, IC4014 of the MAIN board.
2. Connect an oscilloscope to IC401rs, IC4014 of the MAIN board.
3. Press the
@/1
button to turn ON the power.
Precaution
1. Clean the following parts with a denatured alcohol-moistened
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads
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.
Mode
Torque meter
Meter reading
4. Press the
x
button, ENTER button and CLOCK/TIMER SET button simultaneously.
oscilloscope
IC401rs D.SENS (CH1)
IC4014 HHOUT (CH2)
GND
19
5. The disc table rotates in the clockwise direction. The disc table rotation time is displayed with “PLUS ONE” slit as a measuring point.
6. Measure the waveform of the oscilloscope when the disc table is rotating.
7. Move the holder (sensor) center so that the flat portion center at the top of the D.SENS (CH1) input waveform and the “H” center of
6. Measure the waveform of the oscilloscope when the disc table is rotating.
7. Move the holder (sensor) center so that the flat portion center at the top of the D.SENS (CH1) input waveform and the “H” center of
HHOUT (CH2) coincide.
8. Tighten the fixed screw to fix the disc table, then press the CLEAR button.
9. The disc table rotates in the counterclockwise direction. Measure the waveform and make sure that the flat portion center at the top of the
9. The disc table rotates in the counterclockwise direction. Measure the waveform and make sure that the flat portion center at the top of the
D.SENS (CH1) input waveform and the “H” center of HHOUT (CH2) coincide.
10. If the adjustment is not successful, press the CLEAR button to rotate the disc table in the clockwise direction, and perform steps 6 to 9.
Note: During the adjustment mode, the rotational direction is switched each time the CLEAR button is pressed.
Note: During the adjustment mode, the rotational direction is switched each time the CLEAR button is pressed.
Pressing the CHECK button enters the loading mode which will be described later. Pressing the CLEAR button rotates the disc table
again.
again.
PLUS ONE
HHOUT (CH2) waveform
D.SENS (CH1) waveform
Flat portion center of
D.SENS (CH1) waveform
D.SENS (CH1) waveform
Fixed screw
Holder (sensor)
20
MAGNET ASSY ALIGNMENT
1. Check that there is no disc in the unit and then turn ON the power. Open the door, and set a disc in the PLUS ONE slit.
2. Close the door, and while pressing the
2. Close the door, and while pressing the
x
button, ENTER button and CLOCK/TIMER SET button simultaneously.
3. Press the CHECK button, and set the loading mode.
4. Press the +
4. Press the +
J
L
button and chuck the disc.
5. Adjust the magnet assembly and magnet holder so that A = B as shown in the figure.
DISC HOLDER A ALIGNMENT
1. Check that there is no disc in the unit and then turn ON the power. Open the door, and set a disc in the PLUS ONE slit.
2. Close the door, and while pressing the
2. Close the door, and while pressing the
x
button, ENTER button and CLOCK/TIMER SET button simultaneously.
3. Press the CHECK button, and set the loading mode.
4. Press the +
4. Press the +
J
L
button and chuck the disc.
5. Press +
J
L
or
l
j
– button to stop the disc holder A slightly away from the disc.
6. Rotate and adjust the adjusting screw so that the center of the disc and that of the disc holder coincide.
A B
Magnet ASSY
Magnet holder
Magnet ASSY
Screw (For adjustment)
Disc
Disc holder A
Disc holder A
Screw (For adjustment)
Disc
a = b
a b
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