Sony HCD-J3MD User manual

HCD-J3MD
SPECIFICATIONS
SERVICE MANUAL
COMPACT COMPONENT Hi-Fi SYSTEM
AEP Model
UK Model
E Model
Chinese Model
Model Name Using Similar Mechanism HCD-MD373
Mechanism Type CDM55A-5SBD32
Base Unit Type BU-5SBD32
Optical Pick-up Type KSS-213BA/F-NP
Model Name Using Similar Mechanism HCD-MD373
Mechanism Type MDM-5H
Optical Pick-up Type KMS-260B/J1N
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type CMAL1Z027A
CD
SECTION
MD
SECTION
HCD-J3MD is the amplifir, CD, MD, TAPE deck
and tuner section in CMT-J3MD.
CASSETTE
SECTION
— Continued on next page —

2
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 Self-
Diagnosis Function (Error History Display 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.
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.(Timing of pressing three buttons simultaneously is difficult and will put the
machine into improper 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 ?/1button while pressing the sbutton and zTAPE button together.
2. Press the lm/I/CD/TUNING – button or ML/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 lm/TUNING – button or ML/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 lm/TUNING – button or ML/TUNING + button.
6. Pressing the SYNCHRO REC button will display the message “CD-MD SYNC ?” and press ENTER/START to show or to execute the
contents selected.
7. Pressing the SYNCHRO 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/DOLBY NR/STEREO/MONO button. The unit sets into the STANDBY state, and the test
mode ends.

3
ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS
Selecting the Test Mode
Display
total rec
total play
retry err
total err
err history
er refresh
tm refresh
Details of History
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)
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 “0πE@@”.
πindicates 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 lm/TUNING
–button or ML/TUNING + button.
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 SYNCHRO REC button and “CD-MD SYNC?”is displayed, press the ENTER/START
button when “er refresh”appears, press ENTER/YES “R”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 SYNCHRO REC button to show “CD-MD SYNC.”Press ENTER/START 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.
Table of Error Codes
Error Code
E00
E01
E02
E03
E04
E05
E06
E07
E08
E09
E0A
FOK has lost servo lock.
Cannot focus (Servo has lost lock.)
Recording retry
Recording retry error
Playback retry error
(Access error)
Play retry error (C2 error)
Details of Error Error Code Details of Error

4
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED 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.
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.
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.

5
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE WITH
MARK 0ON 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.
ATTENTION AU COMPOSANT AYANT RAPPORT
ÀLA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉDE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
TABLE OF CONTENTS
1. SERVICING NOTE ·························································· 6
2. GENERAL ........................................................................ 18
3. DISASSEMBLY
3-1. Upper Cover ······························································· 21
3-2. Front Panel Section ····················································· 21
3-3. Panel Board ································································· 22
3-4. Main Board·································································· 22
3-5. Cassette Machanism ···················································· 23
3-6. Power Transformer/AMP Board ································· 23
3-7. CD Mechanism Deck ·················································· 24
3-8. Tray, Gear and Cam····················································· 24
3-11.BD (CD) Board, Spindle Motor (M101) and
Sled Motor (M102)······················································ 25
3-9. CD Base Unit ······························································ 25
3-10.Optical Pick-Up Section Of CD
(KSS-213BA/F-NP) ···················································· 25
3-12.MD Mechanism Deck ················································· 26
3-13.Slider (Cam) ································································ 26
3-14.Base Unit (MBU-5A) and BD (MD) Board ················ 27
3-15.Over Write Head·························································· 27
3-16.Optical Pick-Up Of MD (KMS-260B/J1N) ················ 27
3-17.Spindle Motor (M901) and
Sled Motor (M902) (MD)············································ 28
4. TEST MODE .................................................................... 29
5. ELECTRICAL ADJUSTMENTS34
6. DIAGRAMS
6-1. Block Diagrams
–BD (CD) Section – ··················································· 45
–BD (MD) Section (1/2) –·········································· 46
–BD (MD) Section (2/2) –·········································· 47
–Main Section – ························································· 48
6-2. Circuit Boards Location ·············································· 49
6-3. Printed Wiring Board –BD (CD) Section – ················ 50
6-4. Schematic Diagram –BD (CD) Section –··················· 51
6-5. Printed Wiring Board –BD (MD) Section – ··············· 52
6-6. Schematic Diagram –BD (MD) Section (1/2) – ········· 53
6-7. Schematic Diagram –BD (MD) Section (2/2) – ········· 54
6-8. Schematic Diagram –MAIN Section (1/2) – ·············· 55
6-9. Schematic Diagram –MAIN Section (2/2) – ·············· 56
6-10.Printed Wiring Board –MAIN Section – ···················· 57
6-11.Printed Wiring Board –MD DIGITAL Section – ······· 58
6-12.Printed Wiring Board –MD DIGITAL Section – ······· 59
6-13.Printed Wiring Board –AMP Section – ······················ 60
6-14.Schematic Diagram –AMP Section – ························· 61
6-15.Printed Wiring Board
–CASSETTE DECK Section – ·································· 62
6-16.Printed Wiring Board
–CASSETTE DECK Section – ·································· 63
6-17.Printed Wiring Board –PANEL Section – ·················· 64
6-18.Schematic Diagram –PANEL Section – ···················· 65
6-19.Printed Wiring Board –POWER Section –················· 66
6-20.Schematic Diagram –POWER Section – ·················· 67
6-21.Schematic Diagram –BD SWITCH Section – ·········· 68
6-22.Printed Wiring Board –BD SWITCH Section –········· 68
6-23.Schematic Diagram –LOADING Section – ·············· 68
6-24.Printed Wiring Board –LOADING Section – ············ 68
6-25.IC Block Diagrams ······················································ 69
6-26 IC Pin Fuction Description·········································· 74
7. EXPLODED VIEWS
7-1. Case and Casette Mechanism Deck
Section (CMAL1Z027A) ············································ 79
7-2. Front Panel Section ····················································· 80
7-3. Chassis Section ···························································· 81
7-4. Md Mechanism Deck Section-1 (MDM-5H) ·············· 82
7-5. Md Mechanism Deck Section-2 (MBU-5A) ··············· 83
7-6. CD Mechanism Deck Section-1
(CDM55A-5SBD32) ··················································· 84
7-7. CD Mechanism Deck Section-2 (BU-5SBD32)·········· 85
8. ELECTRICAL PARTS LIST ······································· 86

6
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 OUT CLEANING THE OPTIAL PICKUP (CD PLAYER)
SERVICE POSITION OF THE MD MECHANISM SERVICE POSITION OF THE CD MECHANISM
Tray (CDM)
Move the cam block in the direction
of arrow with a finger.
CD mechanism deck
Optical pick-up block
Floating scre
w
Clean the lens block
with applicator.
MD mechanism deck
CD mechanism deck

7
SERVICE POSITION OF THE POWER BOARD
SERVICE POSITION OF THE CASSETTE MECHANISM DECK
Cassette mechanism dec
k
1 Remove the TRANS board together with back panel
(referring to [MAIN Board] ) and move it in
the direction of the arrow.
2 Remove the AMP board together with
heat sink (referring to [POWER TRANSFORMER,
AMP Board], exploded views) and move it in the
direction of the arrow.
Back panel
TRANS board
MAIN board
Heat sink
AMP board

8
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. D onot suspect a fault in this case.
Cold Reset
•The cold reset clears all data including 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 ?/1button while pressing the PLAY MODE/DIRECTION/TUNING MODE button and A(MD)
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 ?/1button while pressing the PLAY MODE/DIRECTION/TUNING MODE button and MD 7
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/ubutton while pressing the PLAY MODE/DIRECTION/TUNING MODE button and CD 7
buttons together.
2. LEDs and fluorescent indicator tube are all turned on.
3. Press A(MD) to enter the model destination indecation mode. “MK 40J”appears.
4. Every pressing of A(MD) changes the display in the following order. MC Version tCD Version tST Version tTC Version t
TA Version tTM Version tmodel destination desplay.
5. Press ENTER/START and the date appears as “1999/19/03”
6. Press MD Dto enter the key check mode.
7. In the key check mode, the fluorescent indicator tube displays “Key0Vol0”. 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.
8. To exit from this mode, press three buttons in the same procedure as step 1, or disconnect the power cord.
Note:
Press the lm/TUNING–button or ML/TUNING+ button for more than 1 second.

9
LED and Fluorescent Indicator Tube All Lit, Key Check Mode
Procedure :
1. When the power ON, press the ?/1button while pressing PLAY MODE/DIRECTION/TUNIG MODE button and sbutton together.
2. Frame of the MD mark and the CD mark flash, and “BASS/TRE FLAT”appears for a moment.
3. When the VOLUME knob is turned clockwise, “VOLUME MAX”appears for a moment.
4. When the VOLUME knob is turned counterclockwise, “VOLUME MIN”appears for a moment.
5. Every pressing of the MUSIC MENU “R”button changes the display in the following order. “BASS/TRE MAX”t“BASS/TRE MIX”
t“BASS/TRE FLAT”
6. Select the function “TAPE”using the FUNCTION button. Set the test tape AMS-110A or AMS-120.
7. Press PLAY MODE/DIRECTION/TUNIG MODE button to enter either “j”(loop) or “h”(two way).
8. Press the SYNCHRO REC button to start the AMS test.
9. Number of AMS signals is counted during the AMS test and the message “EDG#”(# means a number) appears. When the test tape
either AMS-110A or AMS-120 is used, the AMS signal is detected twice before shut off.
10. When the AMS test ends, either “OK”or “NG”appears.
11. To exit the MC test mode, either press the ?/1button or perform the cold reset as described above.
(FWD) REW (Shut
o
(FWD) FF AMS
(FWD) REW AMS
END
(Shut
o
(Shut
o

10
Aging Mode
•Mode for repeating operations of the CD player and TC deck 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 and a tape.
2. Press the FUNCTION button and set the function to CD.
3. While pressing the PLAY MODE/DIRECTION/TUNING MODE button and ENTER/START button, press the ?/1button.
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 CD of player and TC deck momentarily start aging.
6. Operations are performed in the following sequence during aging.
7. To end aging, execute the cold reset.
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 sbutton and FUNCTION button, press the ?/1button.
3. “EMC@@EDC**”id displayed.
@@ : Number of mechanism errors (Last 3 errors)
** : Number of errors (NO DISC ERROR) which occurred after chucking (Last 3 errors)
4. To check the history of mechanism errors, press the PLAY MODE/DIRECTION/TUNING MODE button, and to check BD errors,
press the REPEAT/DOLBY NR/STEREO/MONO button, and switch the display.
5. To end, press the 1/ubutton and turn OFF the power.
6. To erase the error history, perform cold reset.
(While pressing the PLAY MODE/DIRECTION/TUNING MODE button and AMD button, press the ?/1button.)
REW (Shut off)"TAPE AG-1
PLAY
FF
REV PLAY
REW
(2 min) "TAPE AG-2
(Shut off)"TAPE AG-3
(2 min) "TAPE AG-4
(Shut off)"TAPE AG-5
Reading of TOC
Playback of first track (3sec.)
Playback of last track (3sec.)
CD tray open
CD tray close
CD : Cassette :

11
•Reading the Mechanism Error History Display
(To switch the history, press the PLAY MODE/DIRECTION/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/DOLBY NR/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

12
JIG FOR CHECKING BD (MD) BOARD WAVEFORM
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)
RF
VC
TEO For MDM-
3
For MDM-
5
IOP
I+3V
VC
RF
TEO
IOP
I+3V
GND
VC
RF
TEO
IOP
I+3V
GND
1
5
1
6
CN110
RF
5P connector
6P connecto
r
VC
TEO
IOP
I+3V
GND
Mechanism deck

13
IOP Data Recording and Display When optical Pick-up and Non-volatile 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 ?/1button while pressing the sbutton and z(TAPE) button together.
2. Press the lm/TUNING –button or ML/TUNING + button to display “[Service]”, and press the ENTER/YES “R”button.
3. Press the lm/TUNING –button or ML/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 lm/TUNING –button or ML/TUNING + button.
To select the digit : Press the SYNCHRO REC button and ENTER/START button at the sawe time. Note 1)
Note 1 :
If a message “Can not SYNC!”or “NO TAPE”appears momentarily, press SYNCRO REC button several times until “CD-MD
SYNC?”appears momentarily.
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/DOLBY NR/STEREO/MONO button to exit.
Display Precedure:
1. When the power ON, press the ?/1button while pressing the sbutton and z(TAPE) button together.
2. Press the lm/TUNING –button or ML/TUNING + button to display“[Service]”, and press the ENTER/YES “R”button.
3. Press the lm/TUNING –button or ML/TUNING + button to display “lop Read”, and press the ENTER/YES “R”button.
@@.@ : indicates the Iop value labeled on the pick-up.
##.# : indicates the Iop value after adjustment
5. To end, press MENU/NO “R”button to display “Iop Read”. Then press the REPEAT/DOLBY NR/STEREO/MONO button to display
“Standby”.

14
•0.9 mW power
Specified value : 0.84 to 0.92 mW
•7.0 mW power
Specified value : 6.8 to 7.2 mW
lop (at 7mW)
•Labeled on the optical pickup
Iop value ± 10mA
•Traverse waveform
Specified value : Below 10% offset
•Error rate check
Specified value : For points a, b, and c
C1 error : 220 or less
AD error : 2 or less
•Error rate check
Specified value:
a.When using test disc (MDW-74/AU-1)
C1 error : Below 80
AD error : Below 2
b.When using check disc (TDYS-1)
C1 error : 50 or less
•C PLAY error rate check
Specified value:
C1 error : 80 or less
AD error : 2 or less
•Unsatisfactory if displayed as T=@@ (##) [NG]”
NG
(@@, ## are both arbitrary numbers)
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 36)
Traverse check
(5-6-3 : See page 37)
Focus bias check
(5-6-4 : See page 38)
C PLAY check
(5-6-5 : See page 38)
Self-recording/playback
check
(REC/PLAY)
(5-6-6 : See page 38)
TEMP check
(Temperature
compensation
offset check)
(5-6-1 : See page 36)
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 board)
•Check the signals around IC101, IC121, CN102,
CN103 (BD 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.

15
Forced Reset
The system microprocessor can be reset in the following procedure.
Use these procedure when the unit cannot be operated normally due to hung-up of the microprocessor, etc.
Use of the RESET switch is recommended when the machine cannot exit the REtry CASE DISPLAY mode or a machine does not operate
correctly after re-assembling.
Procedure :
Press the S901 ( RESET button of the back panel) on the MAIN board.
[MAIN BOARD] (Component Side)
S901
RESET button

16
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 lm/TUNING –
button or ML/TUNING + button to display “All Erase?”.
3. Press the ENTER/YES “R”button.
4. “All Erase??”is displayed on the fluorescent indicator tube.
5. Press the ENTER/YES “R”button to display “Complete!!”, and press the sbutton immediately. Wait for about 10 seconds while
pressing the button.
6. When the “TOC”displayed on the fluorescent display tube goes off, release the sbutton.
7. Press the zMD button to enter recording standby. Then press the MD 7button and start recording. In about 2 seconds, the record
mode retry cause is displayed. (Fig.1) If recording cannot be performed, press the FUNCTION button and set a different section.
8. To check the “track mode”, stop recording by pressing sbutton and press the MD 7button to start play and the track information
in the play mode appears.
9. To exit the test mode, press the ?/1button, and turn OFF the power.When “STNDBY”disappears, disconnect the power plug from the
outlet. If the test mode cannot be exited, refer to “Forced Reset”on page 15.
Hexadecimal
Bit
Binary
Higher Bits Lower Bits
84218421
b7 b6 b5 b4 b3 b2 b1 b0
00000001
00000010
00000100
00001000
00010000
00100000
01000000
10000000
When ADER was counted more than five times continuously
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
shock
ader5
Discontinuous address
DIN unlock
FCS incorrect
IVR rec error
CLV unlock
Access fault
Cause of Retry Occurring conditions
01
02
04
08
10
20
40
80
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 nb6
Lower bit : 2 = 0010 nb1
In this case, the retry cause is combined of “CLV unlock”and “ader5”.
When A2 is displayed:
Higher bit : A = 1010 nb7+b5
Lower bit : 2 = 0010 nb2
The retry cause in this case is combined of “access fault”, “IVR rec error”, and “ader5”.
}Address (Physical address on disc)
Hexa-
decimal
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
Fig. 2 Reading the Test Mode Display
(During playback)
@@####**$$
Fluorescent display tube display
@@ : Parts No. (name of area named on TOC)
## : Cluster
** : Sector
$$ : Track mode (Track information such as copyright
information of each part)
Reading the Retry Cause Display

17
Hexadecimal
Bit
Binary
Higher Bits Lower Bits
84218421
b7 b6 b5 b4 b3 b2 b1 b0
00000001
00000010
00000100
00001000
00010000
00100000
01000000
10000000
Hexa-
decimal
01
02
04
08
10
20
40
80
Emphasis OFF
Monaural
This is 2-bit display. Normally 01.
01:Normal audio. Others:Invalid
Audio (Normal)
Original
Copyright
Write prohibited
Emphasis ON
Stereo
Invalid
Digital copy
No copyright
Write enable
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 nb7
Lower bit : 4 = 0100 nb2
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 enabled”.
Example When 07 is displayed:
Higher bit : 0 = 1000 nAll 0
Lower bit : 7 = 0111 nb0+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”.
Hexadecimal n Binary Conversion Table
Reading the Track Mode Display
Details
When 0 When 1
Hexadecimal Binary Hexadecimal Binary
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111

18
SECTION 2
GENERAL
1 ?/1 Power switch
2MD slot
3MD A(eject) button
4Disk tray
5CD A(eject) button
6VOLUME knob
7Display
8lm/ML button
9TUNER/BAND button
0Recording button
SYNCHRO REC button
ENTER/START button
zMD button
zTAPE button
qa PHONES jack
qs CD/MD/TAPE play button
sSTOP button
CD Dplay/pause button
MD Dplay/pause button
STAPE pause button
TAPE h/H play button
qd PLAY MODE button
DIRECTION button
TUNING MODE button
qf REPEAT button
DOLBY NR button
STEREO/MONO button
qg FUNCTION button
qh LINE IN jack
`/1
HS HS
A
A
M
ml L
hH
S
qa qsq; qf qg qhqd
`/1
HS HS
A
A
M
ml L
hH
S
4 65
123789
Identifying the Parts
Front Panel
t CD-MD t CD-TAPE t TAPE-MD
DUAL TMD-TAPE T
tCD t TUNER
TAPE TMD TLINE IN T

19
1Reset switch
2Speaker terminal
3AM antenna termianal
4FM antenna terminal
5Power cord
1
3
2
45
Rear Panel
This section is extracted
from instruction manual.

20