Sony ZS-M35 (serv.man2) Service Manual ▷ View online
– 29 –
17. Press the [RADIO/BAND] button, display “EFB =
SAVE” for
a moment and save the adjustment results in the non-volatile
memory.
Next “EFBAL ADJUST” will be displayed.
memory.
Next “EFBAL ADJUST” will be displayed.
18. Press the Z (MD) button and take out the disc.
10. FOCUS BIAS ADJUSTMENT
Adjusting Procedure:
1. Load the continuously-recorded disc. (Refer to “5. CREATING
1. Load the continuously-recorded disc. (Refer to “5. CREATING
CONTINUOUSLY-RECORDED DISC”)
2. Press the u (MD) or x (MD) button to display “CPLAY
MODE”.
3. Press the [RADIO/BAND] button to display “CPLAY MID”.
4. Press the [REC/REC MODE] button when “C1
4. Press the [REC/REC MODE] button when “C1
= AD =
”
is displayed.
5. Press the u (MD) or x (MD) button to display “FBIAS
ADJUST”.
6. Press the [RADIO/BAND] button to display “
/
a =
”.
The first four digits indicate the C1 error rate, the two digits
after [/] indicate ADER, and the 2 digits after [a =] indicate the
focus bias value.
after [/] indicate ADER, and the 2 digits after [a =] indicate the
focus bias value.
7. Turn the JOG dial clockwise and find the focus bias value at
which the C1 error rate becomes about 200 (Refer to Note 2).
8. Press the [RADIO/BAND] button to display “
/
b =
”.
9. Press the u (MD) or x (MD) button counterclockwise and
find the focus bias value at which the C1 error rate becomes
about 200.
about 200.
10. Press the [RADIO/BAND] button to display “
/
c =
”.
11. Check that the C1 error rate is below 50 and ADER is 00. Then
press the [RADIO/BAND] button.
12. If the “(
)” in “
-
-
(
)” is above 20, press the
[RADIO/BAND] button.
If below 20, press the [REC/REC MODE] button and repeat the
adjustment from step 2.
If below 20, press the [REC/REC MODE] button and repeat the
adjustment from step 2.
13. Press the Z (MD) button and take out the disc.
Note 1:
The relation between the C1 error and focus bias is as shown in
the following figure. Find points A and B in the following figure
using the above adjustment. The focal point position C is auto-
matically calculated form points A and B.
the following figure. Find points A and B in the following figure
using the above adjustment. The focal point position C is auto-
matically calculated form points A and B.
Note 2:
As the C1 error rate changes, perform the adjustment using the
average value.
average value.
11. ERROR RATE CHECK
11-1. CD Error Rate Check
Checking Procedure:
1. Load the check disc (MD) TDYS-1.
2. Press the u (MD) or x (MD) button and display “CPLAY
1. Load the check disc (MD) TDYS-1.
2. Press the u (MD) or x (MD) button and display “CPLAY
MODE”.
3. Press the [RADIO/BAND] button twice and display “CPLAY
MID”.
4. The display changes to “C1
= AD =
”.
5. Check that the C1 error rate is below 20.
6. Press the [REC/REC MODE] button to stop playback, then press
6. Press the [REC/REC MODE] button to stop playback, then press
the Z (MD) button and take out the check disc.
11-2. MO Error Rate Check
Checking Procedure:
1. Load the continuously-recorded disc. (Refer to “5. CREATING
1. Load the continuously-recorded disc. (Refer to “5. CREATING
CONTINUOUSLY-RECORDED DISC”)
2. Press the u (MD) or x (MD) button to display “CPLAY
MODE”.
3. Press the [RADIO/BAND] button to display “CPLAY MID”.
4. The display changes to “C1
4. The display changes to “C1
= AD =
”.
5. If the C1 error rate is below 50, check that ADER is 00.
6. Press the [REC/REC MODE] button to stop playback, then press
6. Press the [REC/REC MODE] button to stop playback, then press
the Z (MD) button and take out the test disc.
12. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Checking Procedure:
1. Load the continuously-recorded disc. (Refer to “5. CREAT-
1. Load the continuously-recorded disc. (Refer to “5. CREAT-
ING CONTINUOUSLY-RECORDED DISC”)
2. Press the u (MD) or x (MD) button to display “CPLAY
MODE”.
3. Press the [RADIO/BAND] button twice to display “CPLAY MID”.
4. Press the [REC/REC MODE] button when “C1
4. Press the [REC/REC MODE] button when “C1
= AD =
”
is displayed.
5. Press the u (MD) or x (MD) button to display “FBIAS
CHECK”.
6. Press the [RADIO/BAND] button to display “
/
c =
”.
The first four digits indicate the C1 error rate, the two digits
after [/] indicate ADER, and the 2 digits after [c =] indicate the
focus bias value.
Check that the C1 error is below 50 and ADER is below 2.
after [/] indicate ADER, and the 2 digits after [c =] indicate the
focus bias value.
Check that the C1 error is below 50 and ADER is below 2.
7. Press the [RADIO/BAND] button and display “
/
b =
”.
Check that the C1 error is about 200 and ADER is below 2.
8. Press the [RADIO/BAND] button and display “
/
a =
”.
Check that the C1 error is about 200 and ADER is below 2.
9. Press the [REC/REC MODE] button, then press the Z (MD)
button and take out the disc.
Note 1:
If the C1 error and ADER are above other than the specified value
at points A (step 8. in the above) or B (step 7. in the above), the
focus bias adjustment may not have been carried out properly.
Adjust perform the beginning again.
at points A (step 8. in the above) or B (step 7. in the above), the
focus bias adjustment may not have been carried out properly.
Adjust perform the beginning again.
C1 error
about
200
200
B
C
A
Focus bias value
(F. BIAS)
(F. BIAS)
– 30 –
Adjustment Location:
Note:
It is useful to use the jig for checking the waveform. (Refer to Ser-
vicing Notes on page 5)
vicing Notes on page 5)
CN110
NOTE
D101
I+3V
IOP
TEO
RF
VC
RF
VC
GND
IC171
IC121
IC101
IC192
CN101
– BD BOARD (COMPONENT SIDE) –
– BD BOARD (CONDUCTOR SIDE) –
– 31 –
5-3. CD SECTION
Set the CD test mode when performing confirmations.
After completing the confirmation, release the CD test mode.
After completing the confirmation, release the CD test mode.
In the CD test mode, the set works as following sequence.
CD test mode sequence:
Note 1:
ALL SERVO ON mode 1 and TRACKING GAIN UP mode 1:
LPC ON (lights up “ALL” indication)
ALL SERVO ON mode 2 and TRACKING GAIN UP mode 2:
LPC OFF (Does not lights up “ALL” indication)
*) LPC: Laser power control
LPC ON (lights up “ALL” indication)
ALL SERVO ON mode 2 and TRACKING GAIN UP mode 2:
LPC OFF (Does not lights up “ALL” indication)
*) LPC: Laser power control
Note 2:
TRACKING GAIN UP mode 1, 2 is not used in servicing.
1. Entering the CD Test Mode
1. Press the [POWER] button to turn the power ON.
2. Open the disc lid, and put a disc.
3. Close the disc lid.
4. Press the [POWER] button to standby state.
5. Press the button [EDIT], [SOUND] and > (CD) simulta-
2. Open the disc lid, and put a disc.
3. Close the disc lid.
4. Press the [POWER] button to standby state.
5. Press the button [EDIT], [SOUND] and > (CD) simulta-
neously.
6. After display “CD” for a few seconds, enter the CD test mode
(STOP mode 1), and display as below.
1. Enter the CD test mode
(STOP mode 1)
Press the
x
(CD)
button.
2. STOP mode 2
3. FOCUS mode
4. ALL SERVO
ON mode 2
5. TRACKING
GAIN UP mode 1
6. TRACKING
GAIN UP mode 2
7. ALL SERVO
ON mode1
Press the
x
(CD)
button.
Press the
[ , CD]
button.
u
Press the
[ , CD]
button.
u
Press the
[ , CD]
button.
u
Press the
[ , CD]
button.
u
Press the
[ , CD]
button.
u
Press the
[ , CD]
button.
u
Press the
x
(CD)
button.
Press the
x
(CD)
button.
Press the
x
(CD)
button.
Press the
x
(CD)
button.
Display
2. STOP Mode 2
1. Press the x (CD) button to enter the STOP mode 2, and dis-
play as below.
Display
2. Press the > and . button to move the optical pick-up to
position of the track where signal is recorded.
3. FOCUS Mode (Traverse Confirmation)
1. Press the u button to enter the FOCUS mode and display as
below. (Focus servo ON. CLV-S, tacking and sled servo OFF)
Display
2. Connect an oscilloscope to TP (TEO) and TP (VC) on the CD
board.
Connection:
88
XX
XX
XXX
88
07
00
3A0
11
07
00
3A0
3. Confirm that the traverse level of waveform satisfy specified
value as follows.
Traverse Waveform
+
–
–
CD board
TP (TEO)
TP (VC)
TP (VC)
oscilloscope
(DC range)
Specified Value:
traverse level: 160 to 380 mVp-p
traverse level: 160 to 380 mVp-p
Connecting Location: CD board (See page 32)
A
traverse level:
160 to 380 mVp-p
160 to 380 mVp-p
B
VC
A = B
– 32 –
TP(RFO)
TP(TEO)
TP(VC)
CD BOARD (CONDUCTOR SIDE)
4. ALL SERVO ON Mode 1
(RF Level and Jitter Confirmation 1)
1. Press the u button four times to enter the ALL SERVO ON
mode 1 (start playback the disc) and display as below.
(All servo ON. LPC ON)
(All servo ON. LPC ON)
Display
2. Connect an oscilloscope to TP (RFO) and TP (VC) on the CD
board.
Connection:
21
07
00
3A0
ALL
3. Confirm that the RF level and jitter of waveform satisfy speci-
fied values as follows.
RF signal Waveform
+
–
–
CD board
TP (RFO)
TP (VC)
TP (VC)
oscilloscope
(DC range)
Specified Values:
RF level : 1.0 to 1.4 Vp-p
jitter
RF level : 1.0 to 1.4 Vp-p
jitter
: less than 9 nsec
Connecting Location: CD board
5. ALL SERVO ON Mode 2
(RF Level and Jitter Confirmation 2)
1. Press the u button to enter the LPC OFF mode and display
as below. (All servo ON. LPC OFF)
Display
2. Confirm that the RF level and jitter of waveform satisfy speci-
fied values as follows.
Specified Values:
RF level : 0.8 to 1.4 Vp-p
jitter
RF level : 0.8 to 1.4 Vp-p
jitter
: less than 9 nsec
If the RF level and jitter are out of specified values, measure
again after clean the object lens by an applicator with lens clean-
ing liquid.
again after clean the object lens by an applicator with lens clean-
ing liquid.
6. Releasing the CD Test Mode
1. Press the x (CD) button to stop rotate the disc.
2. Press the [POWER] button to release the CD test mode and turn
2. Press the [POWER] button to release the CD test mode and turn
to standby state.
Connecting Location:
21
07
00
3A0
VOLT/DIV: 50 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
RF level:
1.0 to 1.4 Vp-p
1.0 to 1.4 Vp-p
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