Sony DCR-HC21 (serv.man2) Service Manual ▷ View online
6-66
DCR-HC21
4.
Overall Noise Level Check
Mode
Recording and playback (PLAY/
EDIT mode)
EDIT mode)
Signal
No signal:
Audio left and right terminal of A/V
OUT jack
Audio left and right terminal of A/V
OUT jack
Measurement Point
Audio left or right terminal of A/V
OUT jack
OUT jack
Measuring Instrument
Audio level meter
Specified Value
Below
−
45 dBs
(IHF-A filter ON, 20 kHz LPF ON)
Checking Method:
1) Select page: 7, address: 05, and set the bit value of bit 7 to “1”.
2) Connect the audio left terminal of A/V OUT jack to GND us-
1) Select page: 7, address: 05, and set the bit value of bit 7 to “1”.
2) Connect the audio left terminal of A/V OUT jack to GND us-
ing a jumper wire.
Connect the audio right terminal of A/V OUT jack to GND
using a jumper wire.
Connect the audio right terminal of A/V OUT jack to GND
using a jumper wire.
3) Record the signal.
4) Remove the jumper wires.
5) Playback the recorded section.
6) Check that the noise level is the specified value.
7) Select page: 7, address: 05, and set the bit value of bit 7 to “0”.
4) Remove the jumper wires.
5) Playback the recorded section.
6) Check that the noise level is the specified value.
7) Select page: 7, address: 05, and set the bit value of bit 7 to “0”.
5.
Overall Separation Check
Mode
Recording and playback (PLAY/
EDIT mode)
EDIT mode)
Signal
400 Hz,
−
7.5 dBs signal:
Audio <right> [left] terminal of A/V
OUT jack
No signal:
Audio <left> [right] terminal of A/V
OUT jack
OUT jack
No signal:
Audio <left> [right] terminal of A/V
OUT jack
Measurement Point
Audio <left> [right] terminal of A/V
OUT jack
OUT jack
Measuring Instrument
Audio level meter
Specified Value
Below
−
40 dBs
< > : Left channel check
[ ] : Right channel check
[ ] : Right channel check
Checking Method:
1) Select page: 7, address: 05, and set the bit value of bit 7 to “1”.
2) Input the 400 Hz,
1) Select page: 7, address: 05, and set the bit value of bit 7 to “1”.
2) Input the 400 Hz,
−
7.5 dBs signal in the audio <right> [left]
terminal of A/V OUT jack.
Connect the audio <left> [right] terminal of A/V OUT jack to
GND using a jumper wire.
Connect the audio <left> [right] terminal of A/V OUT jack to
GND using a jumper wire.
3) Record the signal.
4) Remove the input signal, and remove the jumper wire.
5) Playback the recorded section.
6) Check that the signal level of the audio <left> [right] terminal
4) Remove the input signal, and remove the jumper wire.
5) Playback the recorded section.
6) Check that the signal level of the audio <left> [right] terminal
is the specified value.
7) Select page: 7, address: 05, and set the bit value of bit 7 to “0”.
3. Overall Distortion Check
Mode
Recording and playback (PLAY/
EDIT mode)
EDIT mode)
Signal
400 Hz, –7.5 dBs signal:
Audio left and right terminal of A/V
OUT jack
Audio left and right terminal of A/V
OUT jack
Measurement Point
Audio left or right terminal of A/V
OUT jack
OUT jack
Measuring Instrument
Audio distortion meter
Specified Value
Below 0.4%
(200 Hz to 6 kHz BPF ON)
(200 Hz to 6 kHz BPF ON)
Checking Method:
1) Select page: 7, address: 05, and set the bit value of bit 7 to “1”.
2) Input the 400 Hz, –7.5 dBs signal in the audio left and right
1) Select page: 7, address: 05, and set the bit value of bit 7 to “1”.
2) Input the 400 Hz, –7.5 dBs signal in the audio left and right
terminal of A/V OUT jack.
3) Record the signal.
4) Remove the input signal.
5) Playback the recorded section.
6) Check that the distortion is the specified value.
7) Select page: 7, address: 05, and set the bit value of bit 7 to “0”.
4) Remove the input signal.
5) Playback the recorded section.
6) Check that the distortion is the specified value.
7) Select page: 7, address: 05, and set the bit value of bit 7 to “0”.
6-67
DCR-HC21
3-6.
AUDIO SYSTEM ADJUSTMENTS
(MS model)
(MS model)
Note :
MS model: DCR-HC32/HC32E/HC33/HC33E
[Connecting the measuring instruments for the audio]
Connect the audio system measuring instruments in addition to
the video system measuring instruments as shown in Fig. 6-3-9.
the video system measuring instruments as shown in Fig. 6-3-9.
Fig. 6-3-9
Audio
oscillator
Attenuator
600
Ω
600
Ω
(270
Ω
(1-249-410-11) +330
Ω
(1-249-411-11))
Main unit
Main unit
47 k
Ω
47 k
Ω
: 1-249-437-11
Audio level meter or
distortion meter
TV monitor
A/V jack
A/V jack
(L)
(R)
Video
Audio (L)
Audio (R)
In Recording (PLAY/EDIT mode)
In Playback (PLAY/EDIT mode)
Audio
Audio
1.
Playback Level Check
Mode
Playback (PLAY/EDIT mode)
Signal
Alignment tape:
For audio operation check
(XH5-3 (NTSC))
(XH5-3P (PAL))
(XH5-3 (NTSC))
(XH5-3P (PAL))
Measurement Point
Audio left or right terminal of A/V
jack
jack
Measuring Instrument
Audio level meter and frequency
counter
counter
Specified Value
32 kHz mode: 1 kHz, + 3.0
±
2.0 dBs
48 kHz mode: 1 kHz, + 3.0
±
2.0 dBs
44.1 kHz mode:
The 7.35 kHz signal level during EMP
OFF is +2.0
The 7.35 kHz signal level during EMP
OFF is +2.0
±
2.0 dBs.
The 7.35 kHz signal level during EMP
ON is
ON is
−
6
±
2 dB from the signal level
during EMP OFF.
Note :
NTSC model: DCR-HC32/HC33
PAL model: DCR-HC32E/HC33E
PAL model: DCR-HC32E/HC33E
Checking Method:
1) Check that the playback signal level is the specified value.
1) Check that the playback signal level is the specified value.
2. Overall Level Characteristics Check
Mode
Recording and playback (PLAY/
EDIT mode)
EDIT mode)
Signal
400 Hz,
−
7.5 dBs signal:
Audio left and right terminal of A/V
jack
jack
Measurement Point
Audio left or right terminal of A/V
jack
jack
Measuring Instrument
Audio level meter
Specified Value
–7.5
±
3.0 dBs
Checking Method:
1) Input the 400 Hz, –7.5 dBs signal in the audio left and right
1) Input the 400 Hz, –7.5 dBs signal in the audio left and right
terminal of A/V jack.
2) Record the signal.
3) Remove the input signal.
4) Playback the recorded section.
5) Check that the 400 Hz signal level is the specified value.
3) Remove the input signal.
4) Playback the recorded section.
5) Check that the 400 Hz signal level is the specified value.
6-68
DCR-HC21
4.
Overall Noise Level Check
Mode
Recording and playback (PLAY/
EDIT mode)
EDIT mode)
Signal
No signal:
Audio left and right terminal of A/V
jack
Audio left and right terminal of A/V
jack
Measurement Point
Audio left or right terminal of A/V
jack
jack
Measuring Instrument
Audio level meter
Specified Value
Below
−
45 dBs
(IHF-A filter ON, 20 kHz LPF ON)
Checking Method:
1) Connect the audio left terminal of A/V jack to GND using a
1) Connect the audio left terminal of A/V jack to GND using a
jumper wire.
Connect the audio right terminal of A/V jack to GND using a
jumper wire.
Connect the audio right terminal of A/V jack to GND using a
jumper wire.
2) Record the signal.
3) Remove the jumper wires.
4) Playback the recorded section.
5) Check that the noise level is the specified value.
3) Remove the jumper wires.
4) Playback the recorded section.
5) Check that the noise level is the specified value.
5.
Overall Separation Check
Mode
Recording and playback (PLAY/
EDIT mode)
EDIT mode)
Signal
400 Hz,
−
7.5 dBs signal:
Audio <right> [left] terminal of A/V
jack
No signal:
Audio <left> [right] terminal of A/V
jack
jack
No signal:
Audio <left> [right] terminal of A/V
jack
Measurement Point
Audio <left> [right] terminal of A/V
jack
jack
Measuring Instrument
Audio level meter
Specified Value
Below
−
40 dBs
< > : Left channel check
[ ] : Right channel check
[ ] : Right channel check
Checking Method:
1) Input the 400 Hz,
1) Input the 400 Hz,
−
7.5 dBs signal in the audio <right> [left]
terminal of A/V jack.
Connect the audio <left> [right] terminal of A/V jack to GND
using a jumper wire.
Connect the audio <left> [right] terminal of A/V jack to GND
using a jumper wire.
2) Record the signal.
3) Remove the input signal, and remove the jumper wire.
4) Playback the recorded section.
5) Check that the signal level of the audio <left> [right] terminal
3) Remove the input signal, and remove the jumper wire.
4) Playback the recorded section.
5) Check that the signal level of the audio <left> [right] terminal
is the specified value.
3. Overall Distortion Check
Mode
Recording and playback (PLAY/
EDIT mode)
EDIT mode)
Signal
400 Hz, –7.5 dBs signal:
Audio left and right terminal of A/V
jack
Audio left and right terminal of A/V
jack
Measurement Point
Audio left or right terminal of A/V
jack
jack
Measuring Instrument
Audio distortion meter
Specified Value
Below 0.4%
(200 Hz to 6 kHz BPF ON)
(200 Hz to 6 kHz BPF ON)
Checking Method:
1) Input the 400 Hz, –7.5 dBs signal in the audio left and right
1) Input the 400 Hz, –7.5 dBs signal in the audio left and right
terminal of A/V jack.
2) Record the signal.
3) Remove the input signal.
4) Playback the recorded section.
5) Check that the distortion is the specified value.
3) Remove the input signal.
4) Playback the recorded section.
5) Check that the distortion is the specified value.
6-69
DCR-HC21
6-4. SERVICE MODE
4-1.
ADJUSTMENT REMOTE COMMANDER
The adjustment remote commander is used for changing the cal-
culation coefficient in signal processing, EVR data, etc. The ad-
justment remote commander performs bi-directional
communication with the unit using the remote commander signal
line (LANC). The resultant data of this bi-directional communica-
tion is written in the non-volatile memory.
culation coefficient in signal processing, EVR data, etc. The ad-
justment remote commander performs bi-directional
communication with the unit using the remote commander signal
line (LANC). The resultant data of this bi-directional communica-
tion is written in the non-volatile memory.
1.
Using the Adjustment Remote Commander
1) Connect the adjustment remote commander to the LANC ter-
minal.
2) Set the HOLD switch of the adjustment remote commander to
“HOLD” (SERVICE position). If it has been properly con-
nected, the LCD on the adjustment remote commander will
display as shown in Fig. 6-4-1.
nected, the LCD on the adjustment remote commander will
display as shown in Fig. 6-4-1.
Fig. 6-4-1
3) Operate the adjustment remote commander as follows.
•
Changing the page
The page increases when the EDIT SEARCH+ button is
pressed, and decreases when the EDIT SEARCH– button is
pressed. There are altogether 16 pages, from 0 to F.
The page increases when the EDIT SEARCH+ button is
pressed, and decreases when the EDIT SEARCH– button is
pressed. There are altogether 16 pages, from 0 to F.
•
Changing the address
The address increases when the FF (M) button is pressed,
and decreases when the REW (m) button is pressed. There
are altogether 256 addresses, from 00 to FF.
The address increases when the FF (M) button is pressed,
and decreases when the REW (m) button is pressed. There
are altogether 256 addresses, from 00 to FF.
•
Changing the data (Data setting)
The data increases when the PLAY (N) button is pressed,
and decreases when the STOP (x) button is pressed. There
are altogether 256 data, from 00 to FF.
The data increases when the PLAY (N) button is pressed,
and decreases when the STOP (x) button is pressed. There
are altogether 256 data, from 00 to FF.
•
Writing the adjustment data
The PAUSE button must be pressed to write the adjustment
data in the nonvolatile memory. (The new adjusting data will
not be recorded in the nonvolatile memory if this step is not
performed)
The PAUSE button must be pressed to write the adjustment
data in the nonvolatile memory. (The new adjusting data will
not be recorded in the nonvolatile memory if this step is not
performed)
4) After completing all adjustments, turn off the main power sup-
ply (8.4 V) once.
Page
Data
Address
Hexadecimal
notation
notation
LCD Display
Decimal notation
conversion value
conversion value
0 1 2 3 4 5 6 7 8 9 A B C D E F
0 1 2 3 4 5 6 7 8 9 A b c d E F
0 1 2 3 4 5 6 7 8 9 10 1112 13 14 15
2. Precautions Upon Using
the Adjustment Remote Commander
Mishandling of the adjustment remote commander may erase the
correct adjustment data at times. To prevent this, it is recommended
that all adjustment data be noted down before beginning adjust-
ments and new adjustment data after each adjustment.
correct adjustment data at times. To prevent this, it is recommended
that all adjustment data be noted down before beginning adjust-
ments and new adjustment data after each adjustment.
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