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Model
CMT-PX333 HCD-PX333
Pages
110
Size
14 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cmt-px333-hcd-px333.pdf
Date

Sony CMT-PX333 / HCD-PX333 Service Manual ▷ View online

9
HCD-PX333
JIG FOR CHECKING BD (MD) BOARD WAVEFORM
The special jig (J-2501-196-A) is useful for checking the waveform of the BD (MD) board. The names of terminals and the checking items
to be performed are shown as follows.
I+3V : For measuring IOP (Check the deterioration of the optical pick-up laser)
IOP : For measuring IOP (Check the deterioration of the optical pick-up laser)
GND : Ground
TE
: Tracking error signal (Traverse adjustment)
FE
: Focus error signal
VC
: Reference level for checking the signal
RF
: RF signal (Check jitter)
I+3V
CN105
IOP
TE
VC
GND
FE
RF
I+3V
IOP
GND
TE
FE
VC
RF
I+3V
IOP
GND
TE
FE
VC
RF
1
7
for
MDM-7X2A
10
HCD-PX333
Note 1:
About “R”
As this unit has only a few buttons, some operations require the use of remote commander (RM-S55EN/provided with unit: 1-476-664-21)
buttons. These operations are indicated as “R” in this manual.
Example:
MENU/NO “R”
... Press the 
[MENU/NO]
 button of the remote commander.
Note 2:
Incorrect operations may be performed if the MD test mode is not entered properly.
In this case, press the
?/1
button to turn the power off, and retry to enter the MD test mode.
IOP  DATA  RECORDING  AND  DISPLAY  WHEN  OPTICAL  PICK-UP  AND  NON-VOLATILE  MEMORY  (IC195 OF  BD
(MD) BOARD) ARE  REPLACED
The IOP value labeled on the optical pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the need
to look at the value on the label of the optical pick-up. When replacing the optical pick-up or non-volatile memory (IC195 of BD (MD)
board), record the IOP value on the optical pick-up according to the following procedure.
Record Procedure:
1. Press the
?
/
1
button to turn the power on.
2. Press the 
[FUNCTION]
 button to set the MD function.
3. Press three buttons of 
[             TUNING+]
[REC MODE]
, and  
.m
 (MD) simultaneously to enter the MD test mode and display
“[Check]”.
4. Press the
“R”
or
“R”
button to display “[Service]”.
5. Press the
ENTER/YES “R”
button to display “AUTO CHECK”, and press the
“R”
button to display “Iop Write”.
6. Press the
ENTER/YES “R”
button.
7. The display becomes “Ref= @@@.@” (@ is an arbitrary number) and the numbers which can be changed will blink.
8. Input the IOP value written on the optical pick-up.
To select the number : Press the
“R”
or
“R”
button.
To select the digit
: Press the 
[REC MODE]
 button after press the 
[CD SYNC NORMAL]
 button to display “IT”.
9. When the
ENTER/YES “R”
button is pressed, the display becomes “Measu=@@@.@” (@ is an arbitrary number).
10. As the adjustment results are recorded for the step 9 value. Leave it as it is and press the
ENTER/YES “R”
button.
11. “Complete!” will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become “Iop
Write”.
12. Press the 
[REPEAT STEREO/MONO]
 button to complete. “Initialize” will be displayed and release the MD test mode.
Display Precedure:
1. Press the
?
/1
button to turn the power on.
2. Press the 
[FUNCTION]
 button to set the MD function.
3. Press three buttons of 
[            TUNING+]
[REC MODE]
, and  
.m
 (MD) simultaneously to enter the MD test mode and display
“[Check]”.
4. Press the
“R”
or
“R”
button to display “[Service]”.
5. Press the
ENTER/YES “R”
button to display “AUTO CHECK”, and press the
“R”
button to display “Iop Read”.
6. Press the
ENTER/YES “R”
button.
7. “@@.@/##.#” is displayed and the recorded contents are displayed.
@@.@ : Indicates the Iop value labeled on the pick-up.
##.#
: Indicates the Iop value after adjustment.
8. Press the 
[REPEAT STEREO/MONO]
 button to complete. “Initialize” will be displayed and release the MD test mode.
WHEN MEMORY NG IS DISPLAYED
If the nonvolatile memory data is abnormal, “E001 MEMORY NG” will be displayed so that the MD deck does not continue operations. In
this case, set the test mode promptly and perform the following procedure.
Procedure:
1. Enter the MD test mode.
2. Normally a message for selecting the test mode will be displayed. However if the nonvolatile memory is abnormal, the following will be
displayed “INIT EEP?”.
3. Press the
x
(MD) and Z (MD) buttons simultaneously.
4. Press the
“R”
or
 >
 “R”
button to display “MDM-7X2A”.
5. Press the
ENTER/YES “R”
button. If the nonvolatile memory is successfully overwritten, the normal MD test mode will be set and a
message to select the MD test mode will be displayed.
M>
M>
11
HCD-PX333
CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS IN MD
Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent.
Details of the procedures are described in “5 Electrical Adjustments”.
• 0.9 mW power
Specified value : figure1
• 8.4 mW power
Specified value : figure2
Iop (at 8.4mW)
• Labeled on the optical pick-up
Iop value 
± 10mA
• Traverse waveform
Specified value : Below 10% offset
• Error rate check
Specified value : For points A and B
C1 error : About 200
AD error : below 2
For point C
C1 error: 20
AD error: below 2
• Error rate check
Specified value:
a.
When using test disc (MDW-74/GA-1)
C1 error : Below 20
AD error : 00
b.
When using check disc (TDYS-1)
C1 error : Below 20
• CPLAY error rate check
Specified value:
C1 error : Below 20
AD error : Below 2
• Unsatisfactory if displayed as T=@@ (##) [NG]”
NG
(@@, ## are both arbitrary numbers)
Laser power check
(6-2 : See page 40)
Traverse check
(6-6 : See page 41)
Focus bias check
(6-7 : See page 42)
C PLAY check
(6-8 : See page 42)
Self-recording/playback
check
(6-9 : See page 42)
Temperature
compensation
offset check
(6-1 : See page 40)
Criteria for Determination
(Unsatisfactory if specified value is not satisfied)
• Clean the optical pick-up
• Adjust again
• Replace the optical pick-up
• Replace the optical pick-up
• Replace the optical pick-up
• Replace the optical pick-up
• Replace the optical pick-up
If always unsatisfactory:
• Replace the overwrite head
• Check for disconnection of the circuits around the
overwrite head
If occasionally unsatisfactory:
• Check if the overwrite head is distorted
• Check the mechanism around the sled
• Check for disconnection of the circuits around
D101 (BD (MD) board)
• Check the signals around IC101, IC151, CN102,
CN103 (BD (MD) board)
Measure if unsatisfactory
Note:
The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments.
When performing adjustments, use the specified values for adjustments.
Figure1:
SPECIFIED VALUE
KMS-262A
KMS-262E
0.84 to 0.92 mW
0.90 to 0.96 mW
Figure2:
SPECIFIED VALUE
KMS-262A
KMS-262E
8.1 to 8.7 mW
8.4 to 8.9 mW
12
HCD-PX333
RETRY CAUSE DISPLAY MODE IN MD
• In this test mode, the causes for retry of the unit during recording can be displayed on the liquid crystal display. During playback, the
“track mode” for obtaining track information will be set.
This is useful for locating the faulty part of the unit.
• The following will be displayed :
During recording and stop : Retry cause, number of retries, and number of retry errors.
During playback
: Information such as type of disc played, part played, copyright.
These are displayed in hexadecimal.
Precedure:
1. Load a recordable disc whose contents can be erased into the unit.
2. Press the
MENU/NO “R”
button. When “Edit Menu” is displayed on the liquid crystal display, press the
“R”
or
 
“R”
button to display “All Erase?”.
3. Press the
ENTER/YES “R”
button.
4. When “All Erase??” is displayed on the liquid crystal display, the music calendar number blinks.
5. Press the
ENTER/YES “R”
button to display “Complete!”.
6. Press the 
[REC/REC IT]
 button to start recording. Then press the 
[             MD]
 button and start recording. If recording cannot be performed, press
the 
[FUNCTION]
 button and set a different function.
7. Press three buttons of
. m
[PLAY MODE TUNING MODE]
 and 
[              MD]
 simultaneously to enter the retry cause display mode.
8. To check the “track mode”, press the 
[            MD]
 button to start playback.
9. To release this mode, press the
I/1
button to turn the power off. When “TOC” goes off, disconnect the power plug from the outlet.
If the test mode cannot be released, refer to “MC COLD RESET” on page 31.
Fig. 1 Reading the Test Mode Display
(During recording and stop)
RTs@@c##e
**
Liquid crystal display
@@ : Cause of retry
##
: Number of retries
**
: Number of retry errors
Fig. 2 Reading the Test Mode Display
(During playback)
@@ ###
** 
$$
Liquid crystal display
@@ : Parts No. (name of area named on TOC)
##
: Cluster
**
: Sector
$$
: Track mode (Track information such as
copyright information of each part)
Reading the Retry Cause Display
8
4
2
1
8
4
2
1
b7 b6 b5 b4 b3 b2 b1 b0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
0
Hexa-
decimal
01
02
04
08
10
20
40
80
Higher Bits
Hexadecimal
Bit
Binary
shock
ader5
Discontinuous address
DIN unlock
FCS incorrect
IVR rec error
CLV unlock
Access fault
Occurring conditions
When track jump (shock) is detected
When ADER was counted more than five times
continuously
When ADIP address is not continuous
When DIN unlock is detected
When not in focus
When ABCD signal level exceeds the specified range
When CLV is unlocked
When access operation is not performed normally
Reading the Display:
Convert the hexadecimal display into binary display. If more than two causes, they will be added.
Example
When 42 is displayed:
Higher bit : 4 = 0100 t b6
Lower bit : 2 = 0010 t b1
In this case, the retry cause is combined of “CLV unlock” and “ader5”.
When A2 is displayed:
Higher bit : A = 1010 t b7 + b5
Lower bit : 2 = 0010 t b1
The retry cause in this case is combined of “Access fault”, “IVR rec error”, and “ader5”.
Address
N X
N X
N X
Cause of Retry
Lower Bits
Page of 110
Display

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