Sony HCD-F150 / HCD-FR10 / MHC-F150 / MHC-FR10 Service Manual ▷ View online
— 21 —
SECTION 5
ELECTRICAL ADJUSTMENTS
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 1dB of peak.
so that outputs match within 1dB of peak.
3. Mode: Playback
4. After the adjustments, apply suitable locking compound to the
pats adjusted.
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
Screw
position
position
L-CH
peak
peak
within
1dB
1dB
Output
level
level
L-CH
peak
peak
R-CH
peak
peak
within
1dB
1dB
Screw
position
position
R-CH
peak
peak
MAIN
board
CN301
set
board
CN301
set
test tape
P-4-A100
(10 kHz, –10 dB)
P-4-A100
(10 kHz, –10 dB)
pin
1
oscilloscope
L-CH
R-CH
V
H
waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good
wrong
pin
2
pin
3
L
R
0 dB=0.775 V
DECK SECTION
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
3. After the adjustments, apply suitable locking compound to the
parts adjust.
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.)
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.
• Test Tape
Record/Playback Head Azimuth Adjustment
Tape
Signal
Used for
P-4-A100
10 kHz, –10 dB
Azimuth Adjustment
WS-48B
3 kHz, 0 dB
Tape Speed Adjustment
P-4-L300
315 Hz, 0 dB
Level Adjustment
DECK A DECK B
Note:
Perform this adjustments for both decks
Procedure:
1. Mode: Playback
1. Mode: Playback
set
main board
CN301
Pin
CN301
Pin
3
(L-CH)
Pin
1
(R-CH)
main board
CN301
Pin
CN301
Pin
2
(GND)
+
–
–
level meter
test tape
P-4-A100
(10 kHz, –10 dB)
P-4-A100
(10 kHz, –10 dB)
— 22 —
INTRODUCTION
When set to the test mode performed in
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 VIDEO.
(If do not operation of stopped from recording complete, after
selecting DECK B with the FUNCTION button, and press
≠º – button then rewind to recording start position.)
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 VIDEO.
(If do not operation of stopped from recording complete, after
selecting DECK B with the FUNCTION button, and press
≠º – button then rewind to recording start position.)
1. Press
[FUNCTION]
button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)
2. Insert a tape into deck B.
3. After press
3. After press
[ REC]
button, press P button, then recording
start.
r
REC Bias Adjustment
DECK B
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 VIDEO.
(If do not operation of stopped from recording complete, after
selecting DECK B with the FUNCTION button, and press
≠º – button then rewind to recording start position.)
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 VIDEO.
(If do not operation of stopped from recording complete, after
selecting DECK B with the FUNCTION button, and press
≠º – button then rewind to recording start position.)
1. Press [FUNCTION] button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)
2. Insert a tape into deck B.
3. After press [
3. After press [
REC] button, press P button, then recording
start.
4. Mode: Record
Tape Speed Adjustment
DECK B
Note:
Start the Tape Speed adjustment as below after setting to the test
mode.
In the test mode, the tape speed is high during pressing the
HI-SPEED DUBBING button.
mode.
In the test mode, the tape speed is high during pressing the
HI-SPEED DUBBING button.
Procedure:
1. Turn the power switch on.
2. Press the
1. Turn the power switch on.
2. Press the
p
button, ENTER button and GROUP 3 button
simultaneously.
(The “VOLUME” on the fluorescent indicator tube will blink
while in the test mode.)
To exit from the test mode, press the
(The “VOLUME” on the fluorescent indicator tube will blink
while in the test mode.)
To exit from the test mode, press the
I/
u
button.
Mode: Playback
1. Insert the WS-48B into the deck B.
2. Press the · button on the deck B.
3. Press the HI-SPEED DUBBING button in playback mode.
2. Press the · button on the deck B.
3. Press the HI-SPEED DUBBING button in playback mode.
Then at HIGH speed mode.
4. Adjust RV1001 on the LEAF SW board do that frequency
counter reads 6,000 ± 180 Hz.
5. Press the HI-SPEED DUBBING button.
Then back to NORMAL speed mode.
6. Adjust RV1002 on the LEAF SW board so that frequency
counter reads 3,000 ± 90 Hz.
Adjustment Location: LEAF SW board
Sample Value of Wow and filter
W,RMS (JIS) within 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 adjustment
level as follows.
Adjustment Level:
CN301 PB 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
(L-CH) and RV401 (R-CH) so that adjustment within adjustment
level as follows.
Adjustment Level:
CN301 PB 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
+
–
–
set
test tape
WS-48B
(3 kHz, 0 dB)
WS-48B
(3 kHz, 0 dB)
main board
CN301 (Pin
CN301 (Pin
3
: L-CH)
(Pin
1
: R-CH)
frequency counter
+
–
–
set
test tape
P-4-L300
(315 Hz, 0 dB)
P-4-L300
(315 Hz, 0 dB)
main board
CN301 (Pin
CN301 (Pin
3
: L-CH)
(Pin
1
: R-CH)
level meter
attenuator
set
MD/VIDEO (AUDIO) IN
1) 315 Hz
2) 10 kHz
2) 10 kHz
50 mV (–23.8 dB)
600
Ω
blank tape
CN-123
CN-123
AF OSC
+
–
–
set
recorded
portion
portion
CN301 (Pin
3
: L-CH)
(Pin
1
: R-CH)
level meter
r
5. Mode: Playback
6. Confirm playback the signal recorded in step 3 become
adjustable level as follows.
If these levels do not adjustable level, adjustment the RV341
(L-CH) and RV441 (R-CH) on the AUDIO board to repeat steps
4 and 5.
If these levels do not adjustable level, adjustment the RV341
(L-CH) and RV441 (R-CH) on the AUDIO board to repeat steps
4 and 5.
Adjustable level: Playback output of 315 Hz to playback
output of 10 kHz: ±1.0 dB
Adjustment Location: AUDIO board
REC Level Adjustment
DECK B
Procedure:
— 23 —
4. Mode: Record
5. Mode: Playback
6. Confirm playback the signal recorded in step 3 become
adjustable level as follows.
If these levels do not adjustable level, adjustment the RV301
(L-CH) and RV351 (R-CH) on the MAIN board to repeat steps
4 and 5.
If these levels do not adjustable level, adjustment the RV301
(L-CH) and RV351 (R-CH) on the MAIN board to repeat steps
4 and 5.
Adjustable level:
CN301 PB level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board
CN301 PB level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board
[MAIN BOARD] (Component Side)
[AUDIO BOARD] (Component Side)
[LEAF SW BOARD] (Component Side)
+
–
–
set
recorded
portion
portion
CN301 (Pin
3
: L-CH)
(Pin
1
: R-CH)
level meter
set
MD/VIDEO (AUDIO) IN
315 Hz, 50 mV (–23.8 dB)
315 Hz, 50 mV (–23.8 dB)
blank tape
CS-123
CS-123
600
Ω
attenuator
AF OSC
RV401
RV301
RV341
RV311
RV411
IC602
CN601
L
R
R L
RV441
PB LEVEL
– DECK B –
REC BIAS
L
R
PB LEVEL
– DECK A –
TAPE SPEED
RV1002
RV1001
(NORMAL) (HIGH)
CN1001
REC LEVEL
RV301
L
RV351
R
CN106
CN301
CN107
CN302
IC301
— 24 —
When a general remote commander is used:
1.
1.
Press the 1/u button to turn ON the power.
2.
Open the front cover, and press the CD PLUS ONE button.
3.
Set the disc (YEDS-18) into the “PLUS ONE” slit.
4.
Close the front cover, and chuck the disc.
5.
Press the 1/u button to turn OFF the power.
6.
Connect the oscilloscope to TP (TE) of the BD board.
7.
Connect TP (ADJ) of the MAIN board and connect TP (GND)
with a lead wire.
with a lead wire.
8.
Press the 1/u button to turn ON the power.
9.
Playback the fifth track of the disc.
10. Press the
3 button on the remote commander. (The tracking
servo and the sledding servo are turned OFF.)
11. Check the level B of the oscilliscope's waveform and the A (DC
voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 10%
Confirm the following :
A/B x 100 = less than ± 10%
10. Confirm that oscilloscope waveform is clear and check RF signal
level is correct or not.
11. Turn OFF the power, and remove the lead wire connected at
step 7.
Note : A clear RF signal waveform means that the shape “
◊
” can be
clearly distinguished at the center of the waveform.
E-F Balance (Traverse) Check
The procedure for this checking method differs for when a general
remote control unit is used and not used.
remote control unit is used and not used.
12. Press the
8
button on the remote control unit. (The tracking servo and
sledding servo are turned ON.) Confirm the C (DC voltage) is almost equal
to the A (DC voltage) is step 11.
to the A (DC voltage) is step 11.
13. Turn OFF the power, and remove the lead wire connected at
step 7.
CD SECTION
Note :
1.
CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
Therefore, check each item in order given.
2.
Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3.
Use an oscilloscope with more than 10M
Ω
impedance.
4.
Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.
when the signal level is low than specified value with the
following checks.
S Curve Check
Procedure :
1.
1.
Press the 1/u button to turn ON the power .
2.
Open the front cover, and press the CD PLUS ONE button.
3.
Set the disc (YEDS-18) into the “PLUS ONE” slit.
4.
Close the front cover, and chuck the disc.
5.
Press the 1/u button to turn OFF the power.
6.
Connect the oscilloscope to TP (FE) of the BD board.
7.
Connect TP (ADJ) of the MAIN board and connect TP (GND)
with a lead wire.
with a lead wire.
8.
Press the 1/u button to turn ON the power.
9.
The first track will be played back automatically. When the
CHECK button is pressed, “S JI” will be displayed on the
fluorescent indicator tube, and focus search will be repeated.
CHECK button is pressed, “S JI” will be displayed on the
fluorescent indicator tube, and focus search will be repeated.
10. Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And confirm peak to peak level within 1.8 ±
0.6 Vp-p.
0.6 Vp-p.
11. Turn OFF the power, and remove the lead wire connected at
step 7.
Note : • Try to measure several times to make sure than the ratio
of A : B or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the
brightness to obtain best waveform.
RF Level Check
Procedure :
1.
1.
Press the 1/u button to turn ON the power.
2.
Open the front cover, and press the CD PLUS ONE button.
3.
Set the disc (YEDS-18) into the “PLUS ONE” slit.
4.
Close the front cover, and chuck the disc.
5.
Press the 1/u button to turn OFF the power.
6.
Connect the oscilloscope to TP (RF) of the BD board.
7.
Connect TP (ADJ) of the MAIN board and connect TP (GND)
with a lead wire.
with a lead wire.
8.
Press the 1/u button to turn ON the power.
9.
Playback the fifth track of the disc.
oscilloscope
BD board
TP (FE)
TP (VC)
TP (VC)
S-curve waveform
symmetry
within 1.8
±
0.6Vp-p
A
B
oscilloscope
BD board
TP (RF)
TP (VC)
TP (VC)
RF signal waveform
level : 1.8
±
Vp-p
VOLT/DIV : 200mV
TIME/DIV : 500ns
TIME/DIV : 500ns
+0.3
–0.2
–0.2
TP (TE)
TP (VC)
TP (VC)
BD board
oscilloscope
Traverse waveform
A (DC voltage)
B
Center of the waveform
level : 0.7
±
0.3 Vp-p
0V
Traverse waveform
0V
C (DC
voltage)
voltage)
Tracking servo
Sled servo
Sled servo
ON
Tracking servo
Sled servo
Sled servo
OFF
Click on the first or last page to see other HCD-F150 / HCD-FR10 / MHC-F150 / MHC-FR10 service manuals if exist.