Sony CHC-CV40 / HCD-CV40 Service Manual ▷ View online
21
HCD-CV40
SECTION 4
TEST MODE
[Cold Reset]
• The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning
the set to the customer.
the set to the customer.
Procedure:
1. Press three buttons x , ENTER and ?/1 simultaneously.
2. The set is reset.
1. Press three buttons x , ENTER and ?/1 simultaneously.
2. The set is reset.
[CD Ship Mode]
• This mode moves the optical pick-up to the position durable to
vibration. Use this mode when returning the set to the customer
after repair.
after repair.
Procedure:
1. Press the ?/1 button to turn the set on.
2. Select the function “CD”.
3. Press the DISC 1 button and the FUNCTION button simulta-
1. Press the ?/1 button to turn the set on.
2. Select the function “CD”.
3. Press the DISC 1 button and the FUNCTION button simulta-
neously.
4. After the “STANDBY” display blinks six times, a message
“LOCK” is displayed on the liquid crystal display, and the CD
ship mode is set.
ship mode is set.
[GC Test Mode]
• This mode is used to check the software version, LCD, LED
and keyboard.
Procedure:
1. Press the ?/1 button to turn the set on.
2. Press three buttons x , ENTER and DISC 2 simultaneously.
3. LEDs and segments of liquid crystal display are all turned on.
4. When you want to enter the software version display mode,
1. Press the ?/1 button to turn the set on.
2. Press three buttons x , ENTER and DISC 2 simultaneously.
3. LEDs and segments of liquid crystal display are all turned on.
4. When you want to enter the software version display mode,
press DISC 1 . The model number and destination are displayed.
5. Each time the DISC 1 button is pressed, the display changes
starting from MC version, GC version, CD version, CDD
version, CDMA version, CDMB version, BDA version, BDB
version, ST version, TA version, TM version, TC version and
MD version in this order. By pressing the DISC 3 the date of
the software version is displayed.
version, CDMA version, CDMB version, BDA version, BDB
version, ST version, TA version, TM version, TC version and
MD version in this order. By pressing the DISC 3 the date of
the software version is displayed.
6. Press the DISC 2 button, and the key check mode is activated.
7. In the key check mode, the liquid crystal display displays “K
7. In the key check mode, the liquid crystal display displays “K
0
J 0 V 0”. Each time a button is pressed, “K 0” value increases.
However, once a button is pressed, it is no longer taken into
account.
“V 0” value increases like 1, 2, 3 ... if rotating VOL knob in
“+” direction, or it decreases like 0, 9, 8 ... if rotating in
“–” direction.
However, once a button is pressed, it is no longer taken into
account.
“V 0” value increases like 1, 2, 3 ... if rotating VOL knob in
“+” direction, or it decreases like 0, 9, 8 ... if rotating in
“–” direction.
8. To exit from this mode, press three buttons in the same manner
as step 2, or disconnect the power cord.
[MC Test Mode]
• This mode is used to check operations of the respective sections
of Amplifier, Tuner, CD and Tape.
Procedure:
1.
1.
Press the ?/1 button to turn on the set.
2.
Press the three buttons of x , ENTER and DISC 3 simulta-
neously.
neously.
3.
“MD” is displayed and “ (
g
) ” blinks.
4.
Every pressing the EQ EDIT button changes the displays in
the order of
the order of
5.
When the VOL control knob is turned to “+” direction even
slightly, the sound volume increases to its maximum and a
message “VOL MAX” appears for two seconds, then the display
returns to the original display.
slightly, the sound volume increases to its maximum and a
message “VOL MAX” appears for two seconds, then the display
returns to the original display.
6.
When the VOL control knob is turned to “–” direction even
slightly, the sound volume decreases to its minimum and a
message “VOL MIN” appears for two seconds, then the display
returns to the original display.
slightly, the sound volume decreases to its minimum and a
message “VOL MIN” appears for two seconds, then the display
returns to the original display.
7.
Press the FUNCTION button to the TUNER.
8.
By pressing the PLAY MODE/TUNING MODE button, select
the preset tuning.
the preset tuning.
9.
The default-preset channel is selected. (It means that the
memory is cleared.)
memory is cleared.)
10. When a tape is inserted in Deck and recording is started, the
input source function selects MD automatically.
11. During the recording by turning the m/M knob, the Tape
(Deck) is selected and tape is rewound. Tape stops at around
the record-starting position and playback of the recorded portion
of the tape is started.
the record-starting position and playback of the recorded portion
of the tape is started.
12. Press the ?/1 button to turn the set off. The cold reset is en-
forced at the same time.
[CD Service Mode]
• This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the optical pick-up.
Procedure:
1. Press the ?/1 button to turn the set on.
2. Select the function “CD”.
3. Press three buttons x , FUNCTION and DISC 2 simultaneously.
4. The CD service mode is selected.
5. With the CD in stop status, turn the m/M knob up to move
1. Press the ?/1 button to turn the set on.
2. Select the function “CD”.
3. Press three buttons x , FUNCTION and DISC 2 simultaneously.
4. The CD service mode is selected.
5. With the CD in stop status, turn the m/M knob up to move
the optical pick-up to outside track, or turn the m/M knob
downword to move the optical pick-up to inside track.
downword to move the optical pick-up to inside track.
6. To exit from this mode, perform as follows:
1) Move the optical pick-up to the most inside track.
2) Press ?/1 button to turn the set off.
2) Press ?/1 button to turn the set off.
Note:
• Always move the optical pick-up to most inside track when exit-
ing from this mode. Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively, otherwise the gear can be
chipped.
[CD Ship (Memory Clear) Mode]
• Set the CD ship mode and set the default setup when shipped
from the factory at the next AC power on.
Procedure:
1. Press the ?/1 button to turn the set on.
2. Select the function “CD ”.
3. Press three buttons x , FUNCTION and DISC 1 simulta-
1. Press the ?/1 button to turn the set on.
2. Select the function “CD ”.
3. Press three buttons x , FUNCTION and DISC 1 simulta-
neously.
4. After the “STANDBY” display blinks six times, a message
“LOCK” is displayed on the liquid crystal display, and the CD
ship mode is set.
ship mode is set.
[CD Repeat 5 Times Limit Release Mode]
• 5 times limit of repeating CD is released.
Procedure:
1.
Procedure:
1.
Press the ?/1 button to turn the set on.
2.
Press three buttons x , FUNCTION and Z (DISC 1).
3.
5 times limit of repeating CD is released.
4.
Cold reset is performed at power off.
[CD Lock Mode ]
• This mode locks the tray and a CD in the set even after power-
off.
Procedure:
1.
1.
Press the ?/1 button to turn the set on.
2.
Set a CD in the set.
3.
Press two buttons x and Z (DISC 1) simultaneously for five
seconds.
seconds.
4.
The message “LOCKED” is displayed and the tray is locked.
5.
After the power-off, the tray is still locked.
6.
To unlock the tray , press two buttons x and Z (DISC 1)
simultaneously for five seconds.
simultaneously for five seconds.
7.
The message “UNLOCKED” is displayed and the tray is
unlocked.
unlocked.
“GEQ MIN” t“GEQ FLAT” t“GEQ MAX”
22
HCD-CV40
[Color System Selection]
* Color system can be changed to PAL, NTSC or AUTO.
Procedure:
1.
Procedure:
1.
Turn the power off.
2.
Press two buttons Z (DISC 1) and ?/1 at the same time.
“COLOR PAL” is displayed and the color system is changed
to PAL.
The set is powered on and the function is set to “CD”.
“COLOR PAL” is displayed and the color system is changed
to PAL.
The set is powered on and the function is set to “CD”.
3.
If the Z (DISC 2) and ?/1 buttons are pressed at the same
time in the step 2.
“COLOR AUTO” is displayed and the color system is set to
AUTO.
time in the step 2.
“COLOR AUTO” is displayed and the color system is set to
AUTO.
4.
If the Z (DISC 3) and ?/1 buttons are pressed at the same
time in the step 2.
“COLOR NTSC” is displayed and the color system is set to
NTSC.
time in the step 2.
“COLOR NTSC” is displayed and the color system is set to
NTSC.
[Change-over of AM Tuner Step between 9 kHz and 10 kHz]
• A step of AM channels can be changed over between 9 kHz and
10 kHz.
Procedure:
1.
1.
Press the ?/1 button to turn the set on.
2.
Select the function “TUNER”, and press the TUNER/BAND
button to select the band “AM”.
button to select the band “AM”.
3.
Press the ?/1 button to turn the set off.
4.
Press two buttons REPEAT/FM MODE and ?/1 simulta-
neously, and the LCD changes to “AM 9 kHz STEP” or “AM
10 kHz STEP”, and thus the channel step is changed over.
neously, and the LCD changes to “AM 9 kHz STEP” or “AM
10 kHz STEP”, and thus the channel step is changed over.
23
HCD-CV40
3.04 – 6.96 mN • m
(31 to 71 g • cm)
(0.43 – 0.98 oz • inch)
0.20 – 0.58 mN • m
(2 to 6 g • cm)
(0.02 – 0.08 oz • inch)
3.04 – 6.96 mN • m
(31 to 71 g • cm)
(0.43 – 0.98 oz • inch)
0.20 – 0.58 mN • m
(2 to 6 g • cm)
(0.02 – 0.08 oz • inch)
6.97 – 14.02 mN • m
(71 to 143 g • cm)
(0.98 – 1.99 oz • inch)
9.8 mN • m or more
(100 g • cm or more)
(1.4 oz • inch or more)
9.8 mN • m or more
(100 g • cm or more)
(1.4 oz • inch or more)
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
Precaution
1.
Clean the following parts with a denatured alcohol-moistened
swab:
swab:
record/playback heads
pinch rollers
erase head
rubber belts
capstan
idlers
2.
Demagnetize the record/playback head with a head demag-
netizer.
netizer.
3.
Do not use a magnetized screwdriver for the adjustments.
4.
After the adjustments, apply suitable locking compound to the
parts adjusted.
parts adjusted.
5.
The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
supply voltage unless otherwise noted.
Torque Measurement
[Record/Playback Head Azimuth Adjustment]
Procedure:
1.
1.
Mode : Playback
SECTION 5
MECHANICAL ADJUSTMENTS
Mode
FWD
FWD
back tension
back tension
REV
REV
back tension
back tension
FF/REW
FWD tension
REV tension
Torque meter
Meter reading
SECTION 6
ELECTRICAL ADJUSTMENTS
DECK SECTION
0 dB=0.775V
1.
Demagnetize the record/playback head with a head 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.
7.
Switches and controls should be set as follows unless otherwise
specified.
specified.
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.
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1 dB of peak.
test tape
P-4-A100
(10kHz, –10dB)
P-4-A100
(10kHz, –10dB)
MAIN board
CN322
Pin
CN322
Pin
5
or TP42 (L-CH)
Pin
9
or TP46 (R-CH)
level meter
set
+
–
L-CH
peak
peak
R-CH
peak
peak
screw
position
position
output
level
level
within
1 dB
1 dB
L-CH
peak
peak
R-CH
peak
peak
screw
position
position
within 1dB
Signal
Used for
Tape
P-4-A100
WS-48B
10 kHz, –10 dB
3 kHz, 0 dB
Azimuth Adjustment
Tape Speed Adjustment
24
HCD-CV40
4.
After the adjustments, apply suitable locking compound to the
parts adjusted.
parts adjusted.
Adjustment Location: Record/Playback/Erase Head
[Tape Speed Check]
Note: Set the test mode using the following method and begin tape
speed adjustment.
Procedure:
With the power turned on, press the x button, ENTER button,
and DISC 3 button simultaneously.
(The message “MD” is displayed while in the test mode.)
To exit the test mode, press the "/1 button.
With the power turned on, press the x button, ENTER button,
and DISC 3 button simultaneously.
(The message “MD” is displayed while in the test mode.)
To exit the test mode, press the "/1 button.
1.
Insert the WS-48B into deck.
2.
Press the Y button of deck.
3.
Check the reading of frequency counter becomes 3000
±
90 Hz.
Sample Value of Wow and flutter
W.RMS (JIS) less than 0.3%
(test tape: WS-48B)
(test tape: WS-48B)
Adjustment Location:
[MAIN BOARD]
3.
Mode: Playback
test tape
P-4-A100
(10kHz, –10dB)
P-4-A100
(10kHz, –10dB)
oscilloscope
set
Waveform of oscilloscope
in phase
45
°
90
°
135
°
180
°
good
wrong
Pin
6
(GND)
MAIN board
CN322
Pin
CN322
Pin
5
or TP42 (L-CH)
Pin
9
or TP46 (R-CH)
L
R
[Record Bias Adjustment]
Procedure:
INTRODUCTION
When set to the test mode performed in
INTRODUCTION
When set to the test mode performed in
Tape Speed Adjustment
,
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 MD.
(After recording, turn the m/M knob without stopping will
return to the position where recording was started.)
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 MD.
(After recording, turn the m/M knob without stopping will
return to the position where recording was started.)
1.
Press the FUNCTION button to select MD. (This step is not
necessary if the above test mode has already been set.)
necessary if the above test mode has already been set.)
2.
Insert a tape into deck, press the REC PAUSE/START button,
and then press the Y button to start recording.
and then press the Y button to start recording.
3.
Mode: Record
5.
Confirm playback the signal recorded in step 2 become
adjustment level as follows.
If these levels do not satisfy adjustment level, adjust the RV653
(L-CH) and RV603 (R-CH) on the TC board to repeat steps 3
and 4.
adjustment level as follows.
If these levels do not satisfy adjustment level, adjust the RV653
(L-CH) and RV603 (R-CH) on the TC board to repeat steps 3
and 4.
Adjustment level: The playback output of 10 kHz level difference
against 315 Hz reference should be 0
±
0.5 dB.
[TC BOARD]
4.
Mode: Playback
recorded
position
position
level meter
set
MAIN board
CN322
Pin
CN322
Pin
5
or TP42 (L-CH)
Pin
9
or TP46 (R-ch)
AF OSC
MD (VIDEO) IN
1) 315 Hz
2) 10 kHz
1) 315 Hz
2) 10 kHz
blank tape
CS-123
CS-123
set
attenuator
600
Ω
} 50 mV (–23.8 dB)
RV652
(L-CH)
RV602
(R-CH)
(R-CH)
RV653
(L-CH)
RV603
(R-CH)
(R-CH)
Record Level
Record Bias
CN322
TP42
TP46
1
11
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