Sony HCD-VZ30AV / MHC-VZ30AV Service Manual ▷ View online
17
[MC Test Mode]
• This mode is used to check operations of the respective sections
of Amplifier, Tuner, CD and Tape.
• This mode is used to check operations of the respective sections
of Amplifier, Tuner, CD and Tape.
Procedure:
1.
1.
Press the three buttons of x , DISPLAY and DISC 3
simultaneously.
simultaneously.
2.
A message “TEST MODE” appears on the FL display tube.
3.
When PUSH ENTRY (CURSOR UP) button is pressed, GEQ
increases to its maximum and a message “GEQ MAX” appears.
increases to its maximum and a message “GEQ MAX” appears.
4.
When PUSH ENTRY (CURSOR DOWN) button is pressed,
GEQ decreases to its minimum and a message “GEQ MIN”
appears.
GEQ decreases to its minimum and a message “GEQ MIN”
appears.
5.
When PUSH ENTRY (CURSOR LEFT) or PUSH ENTRY
(CURSOR RIGHT) button is pressed, GEQ is set to flat and a
message “GEQ FLAT” appears.
(CURSOR RIGHT) button is pressed, GEQ is set to flat and a
message “GEQ FLAT” appears.
6.
When the VOLUME control knob is turned clockwise even
slightly, the sound volume increases to its maximum and a
message “VOLUME MAX” appears for two seconds, then the
display returns to the original display.
slightly, the sound volume increases to its maximum and a
message “VOLUME MAX” appears for two seconds, then the
display returns to the original display.
7.
When the VOLUME control knob is turned counter-clockwise
even slightly, the sound volume decreases to its minimum and
a message “VOLUME MIN” appears for two seconds, then
the display returns to the original display.
even slightly, the sound volume decreases to its minimum and
a message “VOLUME MIN” appears for two seconds, then
the display returns to the original display.
8.
In the test mode, the default-preset channel is called even when
the TUNER is selected and an attempt is made to call the preset
channel that has been stored in memory, by operating the Shuttle
knob. (It means that the memory is cleared.)
the TUNER is selected and an attempt is made to call the preset
channel that has been stored in memory, by operating the Shuttle
knob. (It means that the memory is cleared.)
9.
When CD is selected. Press the MODE SELECT button and
press the ENTER button in the “Setup Mode”. Move the
PUSH ENTRY to the right or left and press the ENTER button
in the “CD Edit Start” mode.
The disc that is being chucked at this moment becomes the
default setting. It means that the default disc only is accessed
when any other discs are selected even though the display
indication changes accordingly. At the same time, the DISC 1
button to DISC 5 button cannot be accepted. (It means that
the tray motor and the turntable motor are disabled of their
operation.)
press the ENTER button in the “Setup Mode”. Move the
PUSH ENTRY to the right or left and press the ENTER button
in the “CD Edit Start” mode.
The disc that is being chucked at this moment becomes the
default setting. It means that the default disc only is accessed
when any other discs are selected even though the display
indication changes accordingly. At the same time, the DISC 1
button to DISC 5 button cannot be accepted. (It means that
the tray motor and the turntable motor are disabled of their
operation.)
10. When a tape is inserted in Deck B and recording is started, the
input source function selects VIDEO automatically.
11. When x button is pressed to stop recording, the Tape (Deck)
B is selected and tape is rewound using the m button, tape
is rewound, tape is stops at around the record-starting position
and playback of the recorded portion of the tape is started. If
PAUSE is inserted even once during recording, tape is rewound
to the position around the PAUSE position and is played back.
is rewound, tape is stops at around the record-starting position
and playback of the recorded portion of the tape is started. If
PAUSE is inserted even once during recording, tape is rewound
to the position around the PAUSE position and is played back.
12. When the HI-DUB Button is press during playback of Deck
B, either normal speed or high speed can be selected by this
button.
button.
13. Select the desired loop as follows. Press the MODE SELECT
button and press the ENTER button in the “Setup Mode”.
Move the PUSH ENTRY button to the right or left and press
the ENTER button in the “Direction setup”. Move the PUSH
ENTRY button to the right or left and press ENTER at
“Cycle”. Insert a test tape AMS-110A or AMS-RO to Deck A.
Move the PUSH ENTRY button to the right or left and press
the ENTER button in the “Direction setup”. Move the PUSH
ENTRY button to the right or left and press ENTER at
“Cycle”. Insert a test tape AMS-110A or AMS-RO to Deck A.
14. Press the CD SYNC button to enter the AMS test mode.
15. After a tape is rewound first, the FF AMS is checked, and the
15. After a tape is rewound first, the FF AMS is checked, and the
mechanism is shut off after detecting the AMS signal twice.
16. Then the REW AMS is checked and the mechanism is shut off
after detecting the AMS signal twice.
17. When the check is complete, a message of either OK or NG
appears.
18. When you want to exit this mode, press the ?/1 button twice.
The cold reset is enforced at the same time.
[Aging Mode]
During the aging mode, both the CD player and tape deck are
executed together.
• If an error occurs:
Aging stops, and the error state is displayed on the fluorescent
display tube.
• If no error occurs:
Aging is repeated.
During the aging mode, both the CD player and tape deck are
executed together.
• If an error occurs:
Aging stops, and the error state is displayed on the fluorescent
display tube.
• If no error occurs:
Aging is repeated.
Procedure:
1.
1.
Press the ?/1 button to turn the set ON.
2.
Load 10 minute tapes with unbent rec-proof tabs in decks A
and B.
and B.
3.
Set CD on the DISC 1 table.
4.
Set the CD mode REPEAT to OFF and PLAY MODE to ALL
DISCS.
(Press the MODE SELECT button and move the PUSH
ENTRY button to set these modes.)
DISCS.
(Press the MODE SELECT button and move the PUSH
ENTRY button to set these modes.)
5.
Press the FUNCTION button to switch the function to “CD”.
6.
Press the three buttons x , DISPLAY , and DISC 4 button
simultaneously.
simultaneously.
7.
Aging starts.
8.
To end aging, press the ?/1 button to turn the set OFF.
Aging Sequence:
Aging is performed in the following sequence.
Aging is performed in the following sequence.
• Tape Deck
1.
1.
The tape in deck A is rewound. “TAPE A AG-1” is displayed.
2.
The FWD side of deck A is played for two minutes.
“TAPE A AG-2” is displayed.
“TAPE A AG-2” is displayed.
3.
The tape in deck A is fast forwarded. “TAPE A AG-3” is
displayed. Fast forward is carried out for 20 seconds or to the
tape end.
displayed. Fast forward is carried out for 20 seconds or to the
tape end.
4.
The RVS side of deck A is played for two minutes.
“TAPE A AG-4” is displayed.
“TAPE A AG-4” is displayed.
5.
The tape in deck A is rewound. “TAPE A AG-5” is displayed.
6.
The FWD side of deck B is played for two minutes.
“TAPE B AG-2” is displayed.
“TAPE B AG-2” is displayed.
7.
The tape in deck B is fast forwarded. “TAPE B AG-3” is
displayed. Fast forward is carried out for 20 seconds or to the
tape end.
displayed. Fast forward is carried out for 20 seconds or to the
tape end.
8.
The RVS side of deck B is played for two minutes.
“TAPE B AG-4” is displayed.
“TAPE B AG-4” is displayed.
9.
The tape in deck B is rewound. “TAPE B AG-5” is displayed.
10. Repeated from step 2.
• CD
1.
1.
DISC 1 is chucked.
2.
The TOC is read.
3.
The first track is played for 3 seconds.
4.
The last track is played for 3 seconds.
5.
DISC 1 tray open and close.
6.
Repeated from step 1.
• Display when ended abnormally
When the tape deck is abnormal:
When the tape deck is abnormal:
The state when ended abnormally is displayed.
The contents of display are the same as that during aging.
The contents of display are the same as that during aging.
When the CD player is abnormal:
A message indicating that errors such as “CD MEC ERR” have
occurred.
Check the error contents in the following error history display mode.
occurred.
Check the error contents in the following error history display mode.
18
[Error History Display Mode]
Mode which enables the history of error occurring in the CD player
to be checked.
Execute this mode after ending the aging mode.
to be checked.
Execute this mode after ending the aging mode.
Procedure:
1.
1.
Press the ?/1 button to turn the set ON.
2.
Press the three buttons x , DISPLAY , and Z1
simultaneously.
simultaneously.
3.
Select the desired display mode from the following modes by
moving the PUSH ENTRY button to the right and left.
• Number of mechanism errors display mode
• Mechanism error display mode
• Number of times of NO DISC display mode
• NO DISC display mode
moving the PUSH ENTRY button to the right and left.
• Number of mechanism errors display mode
• Mechanism error display mode
• Number of times of NO DISC display mode
• NO DISC display mode
4.
Press the ?/1 button to end and turn the set OFF.
5.
To erase the error history, perform COLD reset.
(Press the three buttons x , DISPLAY , and DISC 5
simultaneously.
(Press the three buttons x , DISPLAY , and DISC 5
simultaneously.
• Viewing the mechanical error history display
(Switch the history by moving the PUSH ENTRY up and down)
Display
CDM E@@D##$%!
CDM E@@D##$%!
@@ : Error number. 00 is the newest.
##
: Mechanism error after initialization is complete.
$ : 1 or 2 : Mechanism error during the tray loading in between the
stocker position and the rear position behind the stocker
position.
position.
% : 2 : Mechanism error during up and down movement of stocker.
! : 2 : Mechanism error of clamper and that during mode switching.
• Viewing the NO DISC ERROR history display
(Switch the history by moving the PUSH ENTRY up and down)
Display
No E@@D##$$%
No E@@D##$$%
@@ : Error number. 00 is the newest
##
: Error contents
01 : Focus error
02 : GFS error
03 : Setup error
02 : GFS error
03 : Setup error
$$
: Retries
00 : NO DISC is determined without attempting chucking
retry
02 : NO DISC is determined after chucking retry.
%
: State when determined as NO DISC
1
: When stopped
2
: At setup
3
: At TOC READ
4
: When accessing
5
: When playing
6
: When pausing
7
: When manual searching (during play)
8
: When manual searching (during pausing)
[VIDEO CD Color-bars Mode]
On this mode, the data of the color-bars signal as a picture signal
and the 1 kHz sine wave signal as a sound signal are output by the
mechanism controller (IC502) for the video CD signal check. When
measurement of the voltage and waveform on the VIDEO board,
perform it in this mode.
For reference, the color-bars signal can be observed at J302 (VIDEO
OUT) using an oscilloscope.
Procedure:
1. Short the both ends of the land of SL503 of the VIDEO board.
2. Turn the power on. Press the FUNCTION button to select CD.
3. The color-bars appears when the CD is in stop status, and it
On this mode, the data of the color-bars signal as a picture signal
and the 1 kHz sine wave signal as a sound signal are output by the
mechanism controller (IC502) for the video CD signal check. When
measurement of the voltage and waveform on the VIDEO board,
perform it in this mode.
For reference, the color-bars signal can be observed at J302 (VIDEO
OUT) using an oscilloscope.
Procedure:
1. Short the both ends of the land of SL503 of the VIDEO board.
2. Turn the power on. Press the FUNCTION button to select CD.
3. The color-bars appears when the CD is in stop status, and it
disappears when the CD goes in play status.
4. After measuring, remove the lead wire connected.VIDEO board
(SIDE B)
J301
J302
CN501
CN503
SL503
SL502
SL501
CHECK LED
CN502
VIDEO board (SIDE A)
19
Precaution
1.
1.
Clean the following parts with a denatured alcohol-
moistened swab:
moistened swab:
record/playback heads
pinch rollers
erase head
rubber belts
capstan
idlers
2.
Demagnetize the record/playback head with a head
demagnetizer.
demagnetizer.
3.
Do not use a magnetized screwdriver for the adjustments.
4.
After the adjustments, apply suitable locking compound to
the parts adjusted.
the parts adjusted.
5.
The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
supply voltage unless otherwise noted.
Torque Measurement
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.
peaks do not match for L-CH and R-CH, turn the
adjustment screw so that outputs match within 1 dB of peak.
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
SECTION 5
ELECTRICAL ADJUSTMENTS
SECTION 4
MECHANICAL ADJUSTMENTS
DECK SECTION
0 dB=0.775V
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.
the 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.)
in this 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.
R-CH.
7.
Switches and controls should be set as follows unless
otherwise specified.
otherwise specified.
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
Tape
Signal
Used for
P-4-A100
WS-48B
P-4-L300
10 kHz, –10 dB
3 kHz, 0 dB
315 Hz, 0 dB
Azimuth Adjustment
Tape Speed Adjustment
Level Adjustment
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)
Mode
Torque meter
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
Meter reading
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
Set
MAIN board
CN301
Pin 3 (R-CH)
Pin 1 (L-CH)
CN301
Pin 3 (R-CH)
Pin 1 (L-CH)
MAIN board
CN301
Pin 2 (GND)
CN301
Pin 2 (GND)
+
–
–
Level meter
Test tape
P-4-A100
(10 kHz, –10 dB)
P-4-A100
(10 kHz, –10 dB)
20
4.
After the adjustments, apply suitable locking compound to
the parts adjusted.
the parts adjusted.
Adjustment Location: Playback Head (Deck A)
Record/Playback/Erase Head (Deck B)
3.
Mode: Playback
Tape Speed Adjustment (Deck A, Deck B)
Note: Set the test mode using the following method and begin tape
speed adjustment.
In the test mode, the speed will switch to double speed or
normal speed each time the HI-DUB button is pressed.
In the test mode, the speed will switch to double speed or
normal speed each time the HI-DUB button is pressed.
Procedure:
With the ?/1 button ON, press the x button, DISPLAY button,
and DISC 3 button simultaneously.
(The “VOLUME” on the fluorescent display tube will blink while
in the test mode.)
To exit the test mode, press the ?/1 button.
With the ?/1 button ON, press the x button, DISPLAY button,
and DISC 3 button simultaneously.
(The “VOLUME” on the fluorescent display tube will blink while
in the test mode.)
To exit the test mode, press the ?/1 button.
1.
Insert the WS-48B into deck B.
2.
Press the H button of deck B.
3.
Press the HI-DUB button and play the tape at double speed.
4.
Adjust RV1001 of the LEAF SW board so that the reading
of the frequency counter becomes 6000 ± 180 Hz.
of the frequency counter becomes 6000 ± 180 Hz.
5.
Press the HI-DUB button and play the tape at normal speed.
6.
Adjust RV1002 of the LEAF SW board so that the reading
of the frequency counter becomes 3000 ± 90 Hz.
of the frequency counter becomes 3000 ± 90 Hz.
Adjustment Location: LEAF SW board
Sample Value of Wow and flutter
W.RMS (JIS) less than 0.3%
(test tape: WS-48B)
(test tape: WS-48B)
Playback Level Adjustment (Deck A, Deck B)
Procedure:
Mode: Playback
Mode: Playback
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:
CN301 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
CN301 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
Adjustment Location
[LEAF SW BOARD]
[LEAF SW BOARD]
RV1002 RV1001
RV1002(Normal Speed)
RV1001(High Speed)
Foward
Reverse
MAIN
board
CN301
set
board
CN301
set
Test tape
P-4-A100
(10 kHz, –10 dB)
P-4-A100
(10 kHz, –10 dB)
Pin 3
Oscilloscope
L-CH
R-CH
V
H
Waveform of oscilloscope
In phase 45
° 90° 135° 180°
Good
Wrong
Pin 2
Pin 1
L
R
+
–
–
Set
Test tape
P-4-L300
(315 Hz, 0 dB)
P-4-L300
(315 Hz, 0 dB)
MAIN board
CN301 (Pin 1 : L-CH)
CN301 (Pin 1 : L-CH)
(Pin 3 : R-CH)
Level meter
Click on the first or last page to see other HCD-VZ30AV / MHC-VZ30AV service manuals if exist.