HCD-MD373 is the amplifir, CD, MD
and tuner section in DHC-MD373.
Model Name Using Similar Mechanism NEW
CD
SECTION
MD
SECTION
Mechanism TypeCDM55A-5SBD32
Base Unit TypeBU-5SBD32
Optical Pick-up TypeKSS-213BA/F-NP
Model Name Using Similar Mechanism MDS-JE520
Mechanism TypeMDM-5A
Optical Pick-up TypeKMS-260B/J1N
AEP Model
UK Model
E Model
Australian Model
Chinese Model
Tourist Model
SPECIFICATIONS
COMPACT DISC DECK RECEIVER
— Continued on next page —
MICROFILM
1
SELF-DIAGNOSIS FUNCTION
The self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and error codes which
show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to the following box
in the instruction manual. For details on how to check error codes during servicing, refer to the following “Procedure for using the SelfDiagnosis Function (Error History Display Mode)”.
Procedure for using the Self-Diagnosis Function (Error History Display Mode).
Note: Perform the self-diagnosis function in the “error history display mode” in the test mode. The following describes the least required
procedure. Be careful not to enter other modes by mistake. If you set other modes accidentally, press the MENU/NO “R” button to
exit the mode.
1. When the power ON, press the 1/u button while pressing the p (MD) button and r REC button together.
2. Press the =0/MD/CD/TUNING – button or )+/MD/CD/TUNING + button and when “[Service]” is displayed, press the
ENTER/YES “R” button. (If nothing is displayed, press the FUNCTION button and set the function to “MD”.)
3. Press the =0/MD/CD/TUNING – button or )+/MD/CD/TUNING + button and display “ERR DP MODE”.
4. Pressing the ENTER/YES “R” button sets the error history mode and displays “total rec”.
5. Select the contents to be displayed or executed using the =0/MD/CD/TUNING – button or )+/MD/CD/TUNING + button.
6. Pressing the SYNC REC button will display or execute the contents selected.
7. Pressing the SYNC REC button another time returns to step 4.
8. Pressing the MENU/NO “R” button displays “ERROR DP MODE” and exits the error history mode.
9. To exit the test mode, press the REPEAT/STEREO/MONO button. The unit sets into the STANDBY state, and the test mode ends.
Note 1: About “R”
As this unit has only a few buttons, some operations require the use of remote commander (RM-SJ373/provided with unit: 1-418-554-11)
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 test mode is not set properly.
In this case, press the RESET button of the back panel.
2
ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS
Selecting the Test Mode
Display
total rec
total play
retry err
total err
err history
Details of History
Displays the recording time.
Displayed as “rππππππh”.
The displayed time is the total time the laser is set to the high power state.
This is about 1/4 of the actual recording time.
The time is displayed in decimal digits from 0h to 65535h.
Displays the play time.
Displayed as “pππππππh”. The time displayed is the total actual play time. Pauses are not counted.
The time is displayed in decimal digits from 0h to 65535h.
Displays the total number of retries during recording and number of retry errors during play.
Displayed as “rππ pππ”.
“r” indicates the retries during recording while “p” indicates the retry errors during play.
The number of retries and retry errors are displayed in hexadecimal digits from 00 to FF.
Displays the total number of errors.
Displayed as “total ππ”.
The number of errors is displayed in hexadecimal digits from 00 to FF.
Displays the 10 latest errors.
Displayed as “0π E@@”.
π indicates the history number. The smaller the number, the more recent is the error. (00 is the latest).
@@ indicates the error code.
Refer to the following table for the details. The error history can be switched by pressing the =0/MD/CD/
TUNING – button or )+/MD/CD/TUNING + button.
er refresh
tm refresh
Table of Error Codes
Error Code
E00
E01
E02
E03
E04
No error
Read error. PTOC cannot be read
(DISC ejected)
TOC error. UTOC error
(DISC not ejected)
Loading error
Address cannot be read (Servo has deviated)
Mode which erases the “retry err”, “total err”, and “err history” histories.
When returning the unit to the customer after completing repairs, perform this to erase the past error history,
After pressing the SYNC REC button and “er refresh?” is displayed, press the ENTER/YES “R” button to erase
the history.
“Complete!” will be displayed momentarily.
Be sure to check the following when this mode has been executed.
• The data has been erased.
• The mechanism operates normally when recording and play are performed.
Mode which erases the “total rec” and “total play” histories.
These histories serve as approximate indications of when to replace the optical pickup.
If the optical pickup has been replaced, perform this operation and erase the history.
After pressing the SYNC REC button and “tm refresh?” is displayed, press the ENTER/YES “R” button to
erase the history.
“Complete!” will be displayed momentarily.
Be sure to check the following when this mode has been executed.
• The data has been erased.
• The mechanism operates normally when recording and play are performed.
Details of Error
Error Code
E05
E06
E07
E08
E09
E0A
Details of Error
FOK has deviated
Cannot focus (Servo has deviated)
Recording retry
Recording retry error
Playback retry error
(Access error)
Play retry error (C2 error)
3
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
This caution
label is located
inside the unit.
MODEL IDENTIFICATION
— BACK PANEL —
Parts No.
P ARTS No.MODEL
4-221-082-1πAEP, UK
4-221-082-3πHK, SP, MY, AR, AUS, KR, JE
4-221-082-4πCH
• Abbreviation
HK : Hong Kong model
SP: Singapore model
MY : Malaysia model
AR : Argentine model
AUS : Australian model
KR : Korea model
CH : Chinese model
JE: Tourist model
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation exposure.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of soldering iron around 270˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK ! OR DO TTED LINE
WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
7-4. MD Base Unit Section (MBU-5A) .................................... 80
7-5. CD Mechanism Section (CDM55A-5SB32) ..................... 81
7-6. CD Base Unit Section (BU-5SBD32) ...............................82
8. ELECTRICAL PARTS LIST ........................................ 83
5
SECTION 1
SERVICING NOTE
Note 1: “R”
As this unit has only a few buttons, some operations require the use of remote commander (provided with RM-SJ373/unit: 1-418-554-11)
buttons. These operations are indicated as “R” in this manual.
Example: MENU/NO “R” ...Press the MENU/NO button of the remote commander.
DRAWING OUT THE TRAY DURING POWER OFF
Tray (CDM)
Move the Cam block in the direction
of arrow with a finger.
REMOVING THE INDICATION PLATE (FL)
Note: Follow the disassembly procedure in the numerical order given.
• Press the of the front panel from the rear and remove the 7
indication plate (FL).
7
Indication plate (FL)
2
Nut
1
Knob (VOL)
CLEANING THE OPTICAL PICKUP (CD PLAYER)
CD mechanism deck
4
Panel board
6
Filter (FL)
5
Ring (VOL)
(Remove the two claws from the Front panel back side.)
Floating screw
3
(BVTP 3x10)
Six screws
Optical pick-up block
Clean the lens block
with applicator.
6
CD mechanism deck
SERVICE POSITION THE MD MECHANISM
MD mechanism deck
SERVICE POSITION THE CD MECHANISM
SERVICE POSITION THE POWER BOARD
Power board
Main board
CN993
Amp board
CN802
Extension cable (4P)
(J-2501-042-A)
Extension cable (3P)
(J-2501-045-A)
7
Cold Reset
• The cold reset clears all data inculuding preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the
customer.
Procedure 1: (recommended)
Press the RESET button on the back panel.
Procedure 2:
1. When the power ON, press the 1/u button while pressing the PLAY MODE/TUNING MODE button and p (CD) buttons together.
2. “COLD RESET” is displayed on the fluorescent indicator tube and reset is executed.
Hot Reset
• This mode reset the preset data kept in the memory. The hot reset mode functions same as if the power cord is plugged in and out.
Procedure :
1. When the power ON, press the 1/u button while pressing the PLAY MODE/TUNING MODE button and ^ (CD) buttons together.
2. Turn off the unit and reset is executed.
LED and Fluorescent Indicator Tube All Lit, Key Check Mode
Procedure :
1. When the power ON, press the 1/u button while pressing the PLAY MODE/TUNING MODE button and 6 (CD) buttons together.
2. LEDs and fluorescent indicator tube are all turned on.
3. Press ^ (MD) button to turn set on.
4. In the key check mode, the fluorescent indicator tube displays “Key 0 Vol 0”. Each time a button is pressed, “Key” value increases.
However, once a button is pressed, it is no longer taken into account.
“Vol” Value increases like “1, 2, 3 ...” if rotating VOLUME knob in the clockwise direction, or decreases like “0, 9, 8 ...” if rotating in the
counterclockwise diretion.
5. To exit from this mode, press three buttons in the same procedure as step 1, or disconnect the power cord.
Note:
Press the =0/MD/CD/TUNING– button or )+/MD/CD/TUNING+ button for more than 1 second.
Change-over of AM tuner Step between 9kHz and 10kHz.
• A step of AM channels can be changed over between 9kHz and 10kHz.
1. Press 1/u button to turn set on.
2. Select the function “TUNER”, and press TUNER/BAND button to select the BAND “AM”.
3. Press 1/u button to turn on the set OFF.
4. When the power OFF, press 1/u button while pressing the PLAY MODE/TUNING MODE button.
The display of fluorescent indicator tube changes to “AM 9k STEP” or “AM 10k STEP”, and thus the channel step is changed over.
CD Text Display
• This unit displays CD text.
Text is displayed for the first 50 track only and will not be displayed from the 51st track onwards. Do not suspect a fault in this case.
In some cases, some special characters will not be displayed and may be replaced by other characters. Donot suspect a fault in this case.
8
Aging Mode
• Mode for repeating operations of the CD player automatically.
When errors occur:
Aging stops and a message indicating that an error has occurred such as “CD MEC ERR” is displayed.
(For details of errors, refer to “Error History Display Mode”.)
When no errors occur:
Aging is repeatedly performed.
Procedure:
1. Load any CD.
2. Press the FUNCTION button and set the function to CD.
3. While pressing the PLAY MODE/TUNING MODE button and ^ (MD) button, press the 1/u button.
4. “AGING” is displayed on the fluorescent display tube briefly.
5. When the aging mode is set, the CD mark and MD mark on the fluorescent tube blink.
6. Pressing the ^ (CD) button starts aging. Operations are performed in the following sequence during aging.
Reading of TOC
Playback of first track
Playback of last track
CD tray open
CD tray close
7. To end aging, while pressing the PLAY MODE/TUNING MODE button and ^ (CD) button, press the 1/u button.
(Hot reset is executed.)
Error History Display Mode
Mode for checking the history of errors which have occurred in the CD player.
Execute this mode after ending the aging mode.
Procedure:
1. Press the FUNCTION button, and set the function to “CD”.
2. While pressing the p (MD) button and )+/MD/CD/TUNING+ button, press the 1/u button.
3. “EMC@@EDC**” id displayed.
@@ : Number of mechanism errors (Past 3 errors)
**: Number of errors (NO DISC ERROR) which occurred after chucking (Past 3 errors)
4. To check the history of mechanism errors, press the PLAY MODE/TUNING MODE button, and to check BD errors, press the REPEAT/
STEREO/MONO button, and switch the display.
5. To end, press the 1/u button and turn OFF the power.
6. To erase the error history, perform COLD reset.
(While pressing the PLAY MODE/TUNING MODE button and p (CD) button, press the 1/u button.)
9
• Reading the Mechanism Error History Display
(To switch the history, press the PLAY MODE/TUNING MODE button.)
Display
E@@M**#*$*
@@: Error number. 00 is the latest
*: Invalid
#: Load in operations related
D: Operations stopped due to problems other than mechanism related during CLOSE
E: Operations stopped due to problems other than mechanism related during OPEN
C: Operations stopped due to problems other than mechanism related during chucking up
$: Load out operations related
1: Operations stopped during chucking up
2: Operations stopped during chucking down
• Reading the BD Error History Display
(To switch the history, press the REPEAT/STEREO/MONO button.)
Display
E@@D##SS%*
@@: Error number. 00 is the latest
##: Error details
01: Focus error
02: GFS error
03: Setup error
$$: Retry performed/not performed
00: Determined as NO DISC without chucking retry
02: Determined as NO DISC after chucking retry
%: State when determined as NO DISC
1: When stopped
2: During setup
3: During TOC READ
4: During access
5: During playback
6: During PAUSE
7: During manual search (during playback)
8: During manual search (during Pause)
*: Invalid
10
JIG FOR CHECKING BD (MD) BOARD WAVEFORM
3
r
The special jig (J-2501-149-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.
GND : Ground
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)
TEO : TRK error signal (Traverse adjustment)
VC : Reference level for checking the signal
RF: RF signal (Check jitter)
Mechanism deck
RF
VC
TEO
IOP
I+3V
GND
RF
VC
TEO
CN110
6P connecto
5P connector
1
RF
VC
TEO For MDMIOP
I+3V
5
1
IOP
I+3V
GND
VC
RF
TEO
For MDM-5
IOP
I+3V
6
GND
11
IOP DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-V OLATILE MEMORY (IC171 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 (IC171 of BD (MD)
board), record the IOP value on the optical pick-up according to the following procedure.
Record Precedure:
1. When the power ON, press the 1/u button while pressing the p (MD) button and r (REC) button together.
2. Press the =0/MD/CD/TUNING – button or )+/MD/CD/TUNING + button to display “[Service]”, and press the ENTER/
YES “R” button.
3. Press the =0/MD/CD/TUNING – button or )+/MD/CD/TUNING + button to display “ lop. Write”, and press the ENTER/
YES “R” button.
4. The display becomes “Ref=@@@.@” (@ is an arbitrary number) and the numbers which can be changed will blink.
5. Input the IOP value written on the optical pick-up.
To select the number : Press the =0/MD/CD/TUNING – button or )+/MD/CD/TUNING + button.
To select the digit: Press the SYNC REC button.
6. When the ENTER/YES “R” button is pressed, the display becomes “Measu=@@@.@” (@ is an arbitrary number).
7. As the adjustment results are recorded for the 6 value. Leave it as it is and press the ENTER/YES “R” button.
8. “Complete!” will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become “Iop
Write”.
9. Press the REPEAT STEREO/MONO button to complete. “Standby” will be displayed.
Display Precedure:
1. When the power ON, press the 1/u button while pressing the p (MD) button and r (REC) button together.
2. Press the =0/MD/CD/TUNING – button or )+/MD/CD/TUNING + button to display “[Service]”, and press the ENTER/
YES “R” button.
3. Press the =0/MD/CD/TUNING – button or )+/MD/CD/TUNING + button to display “lop.Read”.
4. “@@.@/##.#” is displayed and the recorded contents are displayed.
@@.@ : indicates the Iop value labeled on the pick-up.
##.#: indicates the Iop value after adjustment
5. To end, press the SYNC REC button or MENU/NO “R” button to display “Iop Read”. Then press the REPEAT STEREO/MONO
button to display “Standby”.
12
CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS
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”.
Laser power check
(5-6-2 : See page 33)
Traverse check
(5-6-3 : See page 33)
Focus bias check
(5-6-4 : See page 34)
C PLAY check
(5-6-5 : See page 34)
Self-recording/playback
check
(REC/PLAY)
(5-6-6 : See page 34)
• Unsatisfactory if displayed as T=@@ (##) [NG]”
NG
(@@, ## are both arbitrary numbers)
Measure if unsatisfactory:
• 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 board)
• Check the signals around IC101, IC121, CN102,
CN103 (BD board)
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.
FORCED RESET
The system microprocessor can be reset in the following procedure.
Use these procedure when the unit cannot be operated normally due to the overrunning of the microprocessor, etc.
Procedure :
Press the S101 ( RESET button of the back panel) on the MAIN board.
[MAIN BOARD] (Component Side)
SET REAR PANEL
S101
S101
RESET button
13
RETRY CAUSE DISPLAY MODE
• In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent indicator tube. 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 fluorescent indicator tube, press the =0/MD/CD/
TUNING – button or )+/MD/CD/TUNING + button to display “All Erase?”.
3. Press the ENTER/YES “R” button.
4. When “All Erase??” is displayed on the fluorescent indicator tube, the music calendar number blinks.
5. Press the ENTER/YES “R” button to display “Complete!!”, and press the p (MD) button immediately. W ait for about 10 seconds while
pressing the button.
6. When the “TOC” displayed on the fluorescent display tube goes off, release the p (MD) button.
7. Press the r REC 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 section.
8. To check the “track mode”, press the ^ (MD) button to start play.
9. To exit the test mode, press the 1/u button, and turn OFF the power. When “T OC” disappears, disconnect the power plug from the outlet.
If the test mode cannot be exited, refer to “Forced Reset” on page 8.
Fig. 1 Reading the Test Mode Display
(During recording and stop)
RTs@@c##c**
Fluorescent display tube display
@@ : Cause of retry
##: Number of retries
**: Number of retry errors
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 n b6
Lower bit : 2 = 0010 n b1
In this case, the retry cause is combined of “CLV unlock” and “ader5”.
When A2 is displayed:
Higher bit : A = 1010 n b7+b5
Lower bit : 2 = 0010 n b2
The retry cause in this case is combined of “access fault”, “IVR rec error”, and “ader5”.
14
Reading the Track Mode Display
Higher BitsLower Bits
Hexadecimal
Bit
Binary
Reading the Display:
Convert the hexadecimal display into binary display. If more than two causes, they will be added.
Example When 84 is displayed:
Higher bit : 8 = 1000 n b7
Lower bit : 4 = 0100 n b2
In this case, as b2 and b7 are 1 and others are 0, it can be determined that the retry cause is combined of “emphasis OFF”, “monaural”,
“original”, “copyright exists”, and “write allowed”.
Example When 07 is displayed:
Higher bit : 0 = 1000 n All 0
Lower bit : 7 = 0111 n b0+b1+b2
In this case, as b0, b1, and b2 are 1 and others are 0, it can be determined that the retry cause is combined of “emphasis ON”, “stereo”,
“original”, “copyright exists”, and “write prohibited”.
Emphasis OFF
Monaural
This is 2-bit display. Normally 01.
01:Normal audio. Others:Invalid
Audio (Normal)
Original
Copyright
Write prohibited
Details
Emphasis ON
Stereo
Invalid
Digital copy
No copyright
Write allowed
Hexadecimal n Binary Conversion Table
HexadecimalBinaryHexadecimalBinary
0
1
2
3
4
5
6
7
0000
0001
0010
0011
0100
0101
0110
0111
8
9
A
B
C
D
E
F
1000
1001
1010
1011
1100
1101
1110
1111
15
Front Panel
SECTION 2
GENERAL
24
23
12
22
2120
19
181716
34
14
15
13
5
6
7
8
9
10
11
12
LOCATION OF PARTS AND CONTROLS
1 1/u (power) switch
2 MD slot
3 6 (Eject) (MD) button
4 MD indicator
5 (P (MD) button
6 p (MD) button
7 VOLUME (CD) knob
8 (P (CD) button
9 p (CD) button
10 TUNER/BAND button
11 FUNCTION button
12 MD/CD =0/)+ + button
13 MD/CD =0/)+ – button
14 CD indicator
15 6 (CD) button
16 LINE IN jack
17 r REC button
18 CD/MD SYNC button
19 Disc tray
20 REPEAT, STEREO/MONO button
21 PLAY MODE/TUNING MODE button
22 PHONES jack
23 Remote sensor
24 Display window
16
17
This section is extracted from
instruction manual.
18
SECTION 3
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
Case
(Page 19)
Front panel
(Page 20)
Back panel
(Page 20)
CD base unit section
(Page 22)
MD mechanism deck
(Page 23)
Main board and Power transformer
(Page 21)
Optical pick-up (CD)
(Page 22)
BD (CD) board
Sled motor (M102)
Spindle motor (M101)
(Page 23)
Tray, Gear and Cam section
(Page 22)
MD base unit
BD (MD) board
(Page 24)
Slider (CAM)
(Page 24)
Over write head section
Optical pick-up (MD)
(Page 25)
Sled motor (M902)
Spindle motor (M901)
(Page 25)
Note: Follow the disassembly procedure in the numerical order given.
3-1. CASE
1
T wo screws
(Case 3 TP2)
3
Case
2
T wo screws
(Case 3 TP2)
19
3-2. FRONT PANEL
k
7
Front panel block
(Two claws)
Claw
6
Screw
(BVTT 3x6)
2
Flat type wire
(31 core)
Claw
8
Screw
(BVTT 3x6)
Claw
4
Ground wire (Red)
5
Screw
(BVTT 3x10)
9
Screw
(BVTT 3x6)
1
(25 core)
3
Ground wire (Black)
0
MD mechanism bloc
Flat type wire
3-3. BACK PANEL
Claw
3
Back panel
(Two claws)
Claw
Hole
1
Three screws
(BVTP 3x10)
Claw
2
Four screws
(BVTP 3x10)
20
3-4. MAIN BOARD AND POWER TRANSFORMER
5
Connector (2P)
!™
Power transformer
7
Screw
(BVTP 3x6)
Amp board
(CN801)
4
Connector (2P)
3
Connector (4P)
6
Connector (Amp board, CN801)
(Take note of the claw)
8
Screw
(BVTP 3x6)
0
Connector (3P)
3-5. CD MECHANISM DECK
2
Flat type wire
(15 core)
1
Flat type wire
(19 core)
!¡
Four screws
(BVTT 3x6)
4
Screw
(BVTT 3x6)
9
T wo screws
(BVTT 3x6)
3
Holder (MDM)
SP board
Power board
Main board
6
CD mechanism deck
(Two claws)
5
Connector (5P)
Two claws
1
(BVTT 3x6)
Screw
2
Screw
(BVTT 3x6)
7
Flat type wire
(19 core)
21
3-6. TRAY, GEAR AND CAM
2
Push the claw in tne
direction of arrow
8
Gear (B)
A
7
C
5
Roller
0
.
Bushing
Cam (CDM55)
C
4
Belt (CDM55)
6
Pulley (LDG)
B
9
Gear (A)
1
Pull out the tray in the arrow direction A,
and release the lock while pressing
B
this claw in the arrow direction
.
3-7. CD BASE UNIT
1
Floating screw
(PTPWH M2.6)
A
3
Pull out the tray.
2
Remove the Holder (BU) assembly
in the direction of arrow A.
B
Release
3-8. OPTICAL PICK-UP SECTION OF CD
(KSS-213BA/F-NP)
3
Optical pick-up (for CD)
1
Release the lever in the
arrow direction
2
Sled shaft
B
.
B
4
Flat type wire
(16 core)
22
3-9. BD (CD) BOARD, SPINDLE MOTOR (M101) AND SLED MOTOR (M102)
)
6
Gear (M)
7
Flatness gear (P)
Sled motor
8
Two Insulators (BU)
!¡
Spindle motor
(M101)
0
Sled shaft
9
Two Insulators (BU)
3
BD (CD) board
4
T wo screws
(P 2x3)
5
(M102)
1
Screw
(BVTP 2.6x8)
2
Remove the four solders.
M101
IC102
M102
IC103
IC101
3-10. MD MECHANISM DECK
1
(BVTPWH M3)
3
MD mechanism deck
7
Two Step screws
5
Flat type wire
(21 core)
Bracket (MDM
2
Two Step screws
(BVTPWH M3)
4
Connector (7P)
6
Flat type wire
(23 core)
23
3-11. SLIDER (CAM)
6
Slider (CAM)
• Note for installation of Slider (CAM)
2
Bracket (GUIDE L)
1
Two screws
(BTP 2.6x6)
3
Leaf spring
When attaching the slider (cam),
this part of the over write head should
be inside arrow
A
.
5
Bracket (GUIDE R)
3-12. BASE UNIT (MBU-5A) AND BD (MD) BOARD
A
Set the shaft of Cam gear to
be at the position in the figure.
Set the shaft of Lever (O/C) to
be at the position in the figure.
4
Two screws
(BTP 2.6x6)
6
Flexible board
7
Flexible board
24
CN104
CN101
5
(M 1.7x4)
CN110
Screw
1
Three screws
(BTP 2.6x6)
7
BD (MD) board
2
Base unit (MBU-5A)
Spindle motor
-
Sled motor
4
Remove the two solders.
+
3
Remove the two solders.
Read wire's color
Red : +
Black :
-
3-13. OVER WRITE HEAD
5
Spindle motor
(M901)
7
Sled motor
(M902)
4
Three screws
(B 2x5)
6
T wo screws
(P 1.7x2.5)
1
Screw (M1.7)
3
Gear (SL-B)
2
Gear (SL-A)
The BD (MD) board is soldered
at two parts.
(See page 24.)
2
Screw (P 1.7x6)
3
Over write head
(HR901)
1
Flexible board
3-14. OPTICAL PICK-UP OF MD (KMS-260B/J1N)
Note:
Turn the optical pick-up
inside out, and pull out
the flexible board.
3
Main shaft
1
Screw (B 2x8)
5
Optical pick-up (for MD)
4
2
Leaf spring (SHAFT)
Flexible board
3-15. SPINDLE MOTOR (M901) AND SLED MOTOR (M902) (MD)
25
SECTION 4
TEST MODE
Note 1: About “R”
As this unit has only a few buttons, some operations require the use of remote commander (RM-SJ373/provided with unit: 1-418-554-11)
buttons. These operations are indicated as “R” in this manual.
Example: MENU/NO “R” ...Press the MENU/NO button of the remote commander.
4-1. PRECAUTIONS FOR USE OF TEST MODE
• As loading related operations will be performed regardless of the test mode operations being performed, be sure to check that the disc is
stopped before setting and removing it.
Even if the 6 (MD) button is pressed while the disc is rotating during continuous playback, continuous recording, etc., the disc will not
stop rotating.
Therefore, it will be ejected while rotating.
Be sure to press the 6 (MD) button after pressing the MENU/NO “R” button and the rotation of disc is stopped.
4-1-1. Recording laser emission mode and operating buttons
• Continuous recording mode (CREC MODE)
• Laser power check mode (LDPWR CHECK)
• Laser power adjustment mode (LDPWR ADJUST)
• Traverse (MO) check (EF MO CHECK)
• Traverse (MO) adjustment (EF MO ADJUST)
• When pressing the rREC button.
4-2. SETTING THE TEST MODE
The following are two methods of entering the test mode.
Procedure 1:Press the FUNCTION button, and set the function to “MD”. When the power ON, press the 1/u button while pressing the p
(MD) button and r REC button together.
When the test mode is set, “[Check]” will be displayed. Pressing the =0/MD/CD/TUNING – button or )+/MD/
CD/TUNING + button switches between the following four groups; ···Nn Check Nn Adjust Nn Service Nn Develop Nn ···.
Procedure 2:Press the FUNCTION button, and set the function to “MD”. When the power ON, press the 1/u button while pressing the p
(MD) button and SYNC REC button together.
When the test mode is set, “TEMP CHECK” will be displayed. By setting the test mode using this procedure, only the “Check”
group of procedure 1 can be executed.
4-3. EXITING THE TEST MODE
Press the REPEAT/STEREO/MONO button.
4-4. BASIC OPERATIONS OF THE TEST MODE
All operations are performed using the =0/MD/CD/TUNING – button or )+/MD/CD/TUNING + button, ENTER/YES “R”
button, and MENU/NO “R” button.
The functions of these buttons are as follows.
Changes parameters and modes
Proceeds onto the next step. Finalizes input.
Returns to previous step. Stops operations.
Function
26
4-5. SELECTING THE TEST MODE
There are 31 types of test modes as shown below. The groups can be switched by pressing the =0/MD/CD/TUNING – button or
)+/MD/CD/TUNING + button. After selecting the group to be used, press the ENTER/YES “R” button. After setting a certain group,
pressing the =0/MD/CD/TUNING – button or )+/MD/CD/TUNING + button switches between these modes.
Refer to “Group” in the table for details selected.
All items used for servicing can be treated using group S. So be carefully not to enter other groups by mistake.
Display
TEMP CHECK
LDPWR CHECK
EF MO CHECK
EF CD CHECK
FBIAS CHECK
S curve CHECK
VERIFY MODE
DETRK CHECK
TEMP ADJUST
LDPWR ADJUST
EF MO ADJUST
EF CD ADJUST
FBIAS ADJUST
EEP MODE
MANUAL CMD
SVDATA READ
ERR DP MODE
SLED MOVE
ACCESS MODE
0920 CHECK
HEAD ADJUST
CPLAY2 MODE
CREC2 MODE
ADJ CLEAR
AG Set (MO)
AG Set (CD)
Iop Read
Iop Write
INFORMATION
CPLAY MODE
CREC MODE
Contents
Temperature compensation offset check
Laser power check
Traverse (MO) check
Traverse (CD) check
Focus bias check
S letter check
Non-volatile memory check
Detrack check
Temperature compensation offset adjustment
Laser power adjustment
Traverse (MO) adjustment
Traverse (CD) adjustment
Focus bias adjustment
Non-volatile memory control
Command transmission
Status display
Error history display, clear
Sled check
Access check
Outermost circumference check
Head position check
Same functions as CPLAY MODE
Same functions as CREC MODE
Initialization of non-volatile memory of adjustment value
Auto gain output level adjustment (MO)
Auto gain output level adjustment (CD)
IOP data display
IOP data write
Microprocessing version display
Continuous play mode
Continuous recording mode
Mark
(X)
(X)
(X)
(X) (!)
(X)
(X)
(X)
(X)
(X)
(X)
(X)
(X)
Group (*)
CS
CS
CS
CS
CS
C
C
C
AS
AS
AS
AS
AS
D
D
D
S
D
D
D
D
D
D
AS
AS
AS
CS
AS
CS
CASD
CASD
Group (*)
C: Check
S: Service
A: Adjust
D: Develop
• For details of each adjustment mode, refer to “5. Electrical Adjustments”.
For details of “ERR DP MODE”, refer to “Self-Diagnosis Function” on page 2.
• If a different mode has been selected by mistake, press the MENU/NO “R” button to exit that mode.
• Modes with (X) in the Mark column are not used for servicing and therefore are not described in detail. If these modes are set accidentally,
press the MENU/NO “R” button to exit the mode immediately . Be especially careful not to set the modes with (!) as they will o verwrite
the non-volatile memory and reset it, and as a result, the unit will not operate normally.
27
4-5-1. Operating the Continuous Playback Mode
1. Entering the continuous playback mode
1 Set the disc in the unit. (Whichever recordable discs or discs for playback only are available.)
2 Press the =0/MD/CD/TUNING – button or )+/MD/CD/TUNING + button and display “CPLAY MODE”.
3 Press the ENTER/YES “R” button to change the display to “CPLAY MID”.
4 When access completes, the display changes to “C1 = AD = ”.
Note : The numbers “ ” displayed show you error rates and ADER.
2. Changing the parts to be played back
1 Press the ENTER/YES “R” button during continuous playback to change the display as below.
“CPLAY MID” n “CPLAY OUT” n “CPLAY IN”
When pressed another time, the parts to be played back can be moved.
2 When access completes, the display changes to “C1 = AD = ”.Note : The numbers “ ” displayed show you error rates and ADER.
3. Ending the continuous playback mode
1 Press the MENU/NO “R” button. The display will change to “CPLAY MODE”.
2 Press the 6 (MD) button to remove the disc.
Note : The playback start addresses for IN, MID, and OUT are as follows.
IN40h cluster
MID 300h cluster
OUT 700h cluster
4-5-2. Operating the Continuous Recording Mode (Use only when performing self-recording/palyback check.)
1. Entering the continuous recording mode
1 Set a recordable disc in the unit.
2 ress the =0/MD/CD/TUNING – button or )+/MD/CD/TUNING + button and display “CREC MODE”.
3 Press the ENTER/YES “R” button to change the display to “CREC MID”.
4 When access completes, the display changes to “CREC ()” and r REC indicator lights up.
Note : The numbers “ ” displayed shows you the recording position addresses.
2. Changing the parts to be recorded
1 When the ENTER/YES “R” button is pressed during continuous recording, the display changes as below.
“C REC MID” n “C REC OUT” n “C REC IN”
When pressed another time, the parts to be recorded can be changed. r REC indicator goes off.
2 When access completes, the display changes to “CREC ()” and r REC indicator lights up.Note : The numbers “ ” displayed shows you the recording position addresses.
3. Ending the continuous recording mode
1 Press the MENU/NO “R” button. The display changes to “CREC MODE” and r REC indicator goes off.
2 Press the 6 (MD) button to remove the disc.
Note 1 : The recording start addresses for IN, MID, and OUT are as follows.
IN40h cluster
MID300h cluster
OUT 700h cluster
Note 2 :The MENU/NO “R” button can be used to stop recording anytime.
Note 3 :Do not perform continuous recording for long periods of time above 5 minutes.
Note 4 :During continuous recording, be careful not to apply vibration.
4-5-3. Non-Volatile Memory Mode (EEP MODE)
This mode reads and writes the contents of the non-volatile memory.
It is not used in servicing. If set accidentally, press the MENU/NO “R” button immediately to exit it.
28
4-6. FUNCTIONS OF OTHER BUTTONS
Mode display
Error rate display
Address display
Auto gain display (Not used in servicing)
Detrack check display (Not used in servicing)
IVR display (Not used in servicing)
Function
^ (MD)
p (MD)
)+/MD/CD/TUNING +
=0/MD/CD/TUNING –
CLEAR “R”
PLAY MODE/TUNING MODE
DISPLAY “R”
6 (MD)
REPEAT/STEREO/MONO
Sets continuous playback when pressed in the STOP state. When pressed during continuous playback, the tracking
servo turns ON/OFF.
Stops continuous playback and continuous recording.
The sled moves to the outer circumference only when this is pressed.
The sled moves to the inner circumference only when this is pressed.
Switches between the pit and groove modes when pressed.
Switches the spindle servo mode (CLV S ˜ CLV A).
Switches the displayed contents each time the button is pressed.
Ejects the disc
Exits the test mode
Contents
Use the remote commander (RM-SJ373/provided with unit: 1-418-554-11) buttons for operations indicated as “R”.
4-7. TEST MODE DISPLAYS
Each time the DISPLAY “R” button is pressed, the display changes in the following order.
1. Mode display
Displays “TEMP ADJUST”, “CPLAYMODE”, etc.
2. Error rate display
Displays the error rate in the following way.
C1 =
AD =
C1 = Indicates the C1 error.
AD = Indicates ADER.
3. Address display
The address is displayed as follows. (MO:recordable disc, CD:playback only disc)
Pressing the CLEAR “R” button switches between the groove display and pit display.
h = s = (MO pit and CD)
h = a = (MO groove)
h = Indicates the header address.
s = Indicates the SUBQ address.
a = Indicates the ADIP address.
Note: “–” is displayed when servo is not imposed.
4. Auto gain display (Not used in servicing)
The auto gain is displayed as follows.
AG = / [ ]
5. Detrack check display (Not used in servicing)
The detrack is displayed as follows.
ADR =
6. IVR display (Not used in servicing)
The IVR is displayed as follows.
[ ][ ][
29
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