Sony CMT-SV2D / HCD-SV2D Service Manual ▷ View online
17
HCD-SV2D
Check DSP
MCU comm access
Register access
... ok
... ok
2-1-1. Check DSP
1. Select the menu “Check DSP” and press the ENTER “R”
button, then execute this mode.
2. When the check is completed with success, “OK” appears.
When the check finds any failure, “fail” appear.
3. To exit the Test Mode, press the O RETURN “R” button.
2-1-2. Check Flash
1. Select the menu “Check Flash” and press the ENTER “R”
button, then execute this mode.
2. When the check is completed with success, “OK” appears.
When the check finds any failure, “fail” appears.
3. To exit the Test Mode, press the O RETURN “R” button.
2-1-3. Check SDRAM
1. Select the menu “Check SDRAM” and press the ENTER “R”
button, then execute this mode.
2. If error is detected, the “Address” and the “Error” count appear.
3. To exit the Test Mode, press the O RETURN “R” button.
2-1-4. Check EEPROM
1. Select the menu “Check EEPROM” and press the
ENTER “R” button, then execute this mode.
2. If error is detected, the “Address” and the “Error” count appear.
3. To exit the Test Mode, press the O RETURN “R” button.
2-2. SERVO Test MENU
1. Select the menu “SERVO Test Menu” and press the
ENTER “R” button, then execute this mode.
2. When the check is completed with success, “OK” appears.
When the check finds any failure, “fail” appears.
3. To exit the Test Mode, press the O RETURN “R” button.
2-3. FRONT PANEL Test MENU
1. Select the menu “FRONT PANEL Test Menu” and press the
ENTER “R” button, then execute this mode.
2. Press the m “R” or M “R” button to select the desired menu.
3. To exit the Test Mode, press the O RETURN “R” button.
2-3-1. Panel Key Test
1. Select the menu “PANEL KEY Test” and press the
ENTER “R” button, then execute this mode.
2. Press TAPE N , x , M > , .m button on the
Front panel in this order.
3. When the check is completed with success, “OK” appears.
When the check finds any failure, “fail” appears.
4. To exit the Test Mode, press the O RETURN “R” button.
Check Flash
Status
... ok
Check SDRAM
Address
X x XXXX
Error
X
Check EEPROM
Address
X x X X
Error
X
SERVO Test Menu
Check Motor Driver ... ok
FRONT PANEL Test Menu
Panel Key Test
VFD Test
Remote Key Test
Panel Key Test
PLAY
Stop
Next
Prev
... ok
... ok
... ok
... ok
18
HCD-SV2D
IR Remote Test
PLAY
Stop
Next
Prev
... ok
... ok
... ok
... ok
Version Information
MPEG Version
: XXX.XX.XX.XX.X
2-3-2. VFD Test MENU
1. Select the menu “VDF Test Menu” and press the ENTER “R”
button, then execute this mode.
2. When the check is completed with success, “OK” appears.
When the check finds any failure, “fail” appears..
3. To exit the Test Mode, press the O RETURN “R” button.
2-3-3. IR Remote Test
1. Select the menu “IR Remote Test” and press the ENTER “R”
button, then execute this mode.
2. Press TAPE N , x , > , . button on the remote
commander in this order.
3. When the check is completed with success, “OK” appears.
When the check finds any failure, “FAIL” appears.
4. To exit the Test Mode, press the O RETURN “R” button.
3. Version Information
1. Select the menu “Version Information” and press the
ENTER “R” button, then execute this mode.
2. The “Version” appears.
3. To exit the Test Mode, press the O RETURN “R” button.
VFD Test
Status ... ok
19
HCD-SV2D
SECTION 5
MECHANICAL ADJUSTMENTS
2.94 – 7.84 mN • m
(31 to 71 g • cm)
(0.43 – 0.98 oz • inch)
0.15 – 0.59 mN • m
(2 to 6 g • cm)
(0.02 – 0.08 oz • inch)
2.94 – 7.84 mN • m
(30 to 79 g • cm)
(0.42 – 1.11 oz • inch)
0.15 – 0.59 mN • m
(2 to 6 g • cm)
(0.03 – 0.08 oz • inch)
6.86 – 17.64 mN • m
(71 to 143 g • cm)
(0.98 – 2.49 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:
record/playback heads
pinch rollers
erase head
rubber belts
capstan
idlers
2. Demagnetize the record/playback head with a head demag-
netizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to
4. After the adjustments, apply suitable locking compound to
the parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
Torque Measurement
Mode
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
Torque meter
Meter reading
SECTION 6
ELECTRICAL ADJUSTMENTS
[Record/Playback Head Azimuth Adjustment]
Procedure:
1. Mode : Playback
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.
so that outputs match within 1 dB of peak.
test tape
P-4-A100
(10kHz, –10dB)
P-4-A100
(10kHz, –10dB)
MAIN board
JK102
speaker terminal
JK102
speaker terminal
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
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
3. After the adjustments, apply suitable locking compound to
the parts adjusted.
4. The adjustments should be performed with the rated power
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.)
adjustment should be completed before performing recording
circuit adjustment.)
6. The adjustments should be performed for both L-CH and R-
CH.
7. Switches and controls should be set as follows unless otherwise
specified.
Signal
Used for
Tape
P-4-A100
WS-48B
10 kHz, –10 dB
3 kHz, 0 dB
Azimuth Adjustment
Tape Speed Adjustment
20
HCD-SV2D
4. After the adjustments, apply suitable locking compound to
the parts adjusted.
Adjustment Location: Record/Playback/Erase Head
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
MAIN board
JK102
speaker terminal
JK102
speaker terminal
L
R
DVD SECTION
[RF Level Check]
Check the RF level when optical pick-up block (TRAVERSE
MECH) is replaced.
MECH) is replaced.
Connection:
Procedure:
1. Connect an oscilloscope to TP (RF) and TP (VC) on the MPEG
board.
2. Turn the power on.
3. Set the test disc on the tray and press DVDu button to
3. Set the test disc on the tray and press DVDu button to
playback.
4. Observe the waveform of the oscilloscope, and check that the
RF level is satisfied to specified value.
[Test Disc List and Specified Value]
Use the following test disc on adjustment.
Note:
Do not use existing test disc for DVD.
Checking Location: MPEG board
TEST DISC
Specified Value
Deviation
CD (YEDS-18)
310 mV
+30 mV/–50 mV
PART No. :3-702-101-01
DVD Single Layer (HLX-504)
290 mV
+25 mV/–40 mV
PART No. :J-6090-088-A
DVD Dual Layer (HLX-505)
120 mV
+20 mV/–30 mV
PART No. :J-6090-089-A
+
–
–
MPEG board
oscilloscope
TP (RF)
TP (VC)
TP (VC)
U709
TP (RF)
TP (VC)
[MPEG BOARD]
[Tape Speed Check]
Procedure:
1. Turn the power on.
2. Insert the WS-48B into deck.
3. Press the TAPE N button of deck.
4. Check the reading of frequency counter becomes 3000 ± 90
2. Insert the WS-48B into deck.
3. Press the TAPE N button of deck.
4. 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)
Note: Refer to “ 3-13. LID TC ” (see page 14)
adjustment screw
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