Sony MZ-R70 Analog PCLink User manual

– 1 –
MZ-R70
SERVICE MANUAL
PORTABLE MINIDISC RECORDER
Model Name Using Similar Mechanism MZ-R90/R91
MechanismType MT-MZR70-165
Optical Pick-up Name LCX-2R
(Photo:Silver)
System
Audio playing system
MiniDisc digital audio system
Laser diode properties
Material: GaAlAs
Wavelength: λ= 790 nm
Emission duration: continuous
Laser output: less than 44.6 µW
(This output is the value measured at a
distance of 200 mm from the lens surface
on the optical pick-up block with 7 mm
aperture.)
Recording and playback time
Maximum 80 minutes (MDW-80, stereo
recording)
Maximum 160 minutes (MDW-80,
monaural recording)
Maximum 74 minutes (MDW-74, stereo
recording)
Maximum 148 minutes (MDW-74,
monaural recording)
Revolutions
400 rpm to 1,800 rpm (CLV)
Error correction
Advanced Cross Interleave Reed Solomon
Code (ACIRC)
Sampling frequency
44.1 kHz
Sampling rate converter
Input: 32 kHz/44.1 kHz/48 kHz
Coding
Adaptive TRansform Acoustic Coding
(ATRAC)
Modulation system
EFM (Eight to Fourteen Modulation)
Number of channels
2 stereo channels
1 monaural channel
SPECIFICATIONS
Frequency response
20 to 20,000 Hz ± 3 dB
Wow and Flutter
Below measurable limit
Inputs
Microphone: stereo mini-jack, 0.35–1.38
mV
Line in: stereo mini-jack, 69–194 mV
Optical (Digital) in: optical (digital) mini-
jack
Outputs
i1: stereo mini-jack, maximum output
level 5 mW + 5 mW, load impedance 16
ohm
i2: stereo mini-jack, maximum output
level 5 mW + 5 mW, load impedance 16
ohm
General
Powerrequirements
Sony AC Power Adaptor (supplied)
connected at the DC IN 3 V jack:
120 VAC, 60 Hz (US model)
230-240 V AC, 50/60 Hz (UK and Hong
Kong model)
240 VAC, 50/60 Hz (Australia and New
Zealand model)
220-230 VAC, 50/60 Hz (European
model)
220 VAC, 50 Hz (China model)
220 VAC, 50 Hz (Argentina model)
100-240 VAC, 50/60 Hz (Other models)
Nickel cadmium rechargeable battery
NC-WMAA (supplied)
LR6 (size AA) alkaline battery (not
supplied)
Battery operation time
Battery life1)
Batteries Recording2) Playback
NC-WMAA Approx. Approx.
nickel cadmium 3 hours 6.5 hours
rechargeable
battery
LR6 (size AA) Approx. Approx.
Sony alkaline 3 hours3) 17 hours
dry battery
1) The battery life may be shorter due to
operating conditions and the temperature
of the location.
2) When you record, use a fully charged
rechargeable battery.
3) Recording time may differ according to
the alkaline batteries.
– Continued on next page –
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Chinese Model
Tourist Model
US and foreign patents licensed from Dolby
Laboratories Licensing Corporation.
Ver 1.3 2001. 01
With SUPPLEMENT-1
(9-927-631-81)

– 2 –
Flexible Circuit Board Repairing
• Keep the temperature of the 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.
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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
IN NO EVENT SHALL SELLER BE
LIABLE FOR ANY DIRECT,
INCIDENTAL OR CONSEQUENTIAL
DAMAGES OF ANYNATURE, OR
LOSSES OR EXPENSES RESULTING
FROM ANY DEFECTIVE PRODUCT
OR THE USE OF ANY PRODUCT.
“MD WALKMAN” is a trademark of Sony
Corporation.
This MiniDisc player is classi-
fied as a CLASS 1 LASER
product.
The CLASS 1 LASER
PRODUCT label is located on
the bottom exterior.
Dimensions
Approx. 81 ×74 ×26.2 mm (w/h/d)
(3 1/4×3 ×1 1/16 in.) without projections.
Mass
Approx. 115 g (4 oz) the recorder only
Approx. 155 g (5.4 oz) incl. a recordable
MD, and NC-WMAA nickel cadmium
rechargeable battery
Supplied accessories
AC power adaptor (1)
Headphones with a remote control (1)
Optical cable (1)
NC-WMAA nickel cadmium rechargeable
battery (1)
Rechargeable battery carrying case (1)
Carrying pouch (1)
Design and specifications are subject to change
without notice.
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
À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES
SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT.
NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES
SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL
OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

– 3 –
1. SERVICING NOTE......................................................... 4
2. GENERAL......................................................................... 5
Looking at the Controls ........................................................5
Recording an MD Right Away! ............................................6
Playing an MD Right Away! .................................................7
3. DISASSEMBLY ............................................................... 8
3-1. Block Assy, Bottom .............................................................. 8
3-2. Panel Block Assy, Upper....................................................... 8
3-3. LCD Module ......................................................................... 9
3-4. Main Board ........................................................................... 9
3-5. MD Mechanism Deck .........................................................10
3-6. Service Assy, OP ................................................................. 10
3-7. Holder Assy......................................................................... 11
3-8. Motor Flexible Board ..........................................................11
3-9. Motor, DC (M602) ..............................................................12
3-10. “Motor, DC (M601)”, “Motor, DC (M603)” ....................12
4. TEST MODE................................................................... 13
4-1. Outline ................................................................................. 13
4-2. Test Mode ............................................................................13
4-3. Manual Mode ......................................................................14
4-4. OverallAdjustment Mode ................................................... 15
4-5. Sound Skip Check Result Display Mode ............................16
4-6. Self-diagnosis Display Mode .............................................. 17
4-7. Key Check Mode................................................................. 19
TABLE OF CONTENTS
5. ELECTRICAL ADJUSTMENTS.............................. 20
5-1. Outline ................................................................................. 20
5-2. Precautions for Adjustment .................................................20
5-3. Adjustment Sequence .......................................................... 20
5-4. NV Reset ............................................................................. 20
5-5. Power Supply Manual Adjustment...................................... 20
5-6. Temperature Correction ....................................................... 22
5-7. OverallAdjustment Mode ................................................... 22
5-8. Laser Power Check ............................................................. 23
6. DIAGRAMS..................................................................... 25
6-1. Block Diagram – MD Section –.......................................... 25
6-2. Block Diagram –Audio Section – ...................................... 27
6-3. Block Diagram – Power Supply Section –.......................... 29
6-4. Printed Wiring Board – Main Board – ................................ 31
6-5. Schematic Diagram – Main Board (1/3) – .......................... 35
6-6. Schematic Diagram – Main Board (2/3) – .......................... 37
6-7. Schematic Diagram – Main Board (3/3) – .......................... 39
6-8. IC Block Diagrams.............................................................. 41
6-9. IC Pin Descriptions ............................................................. 44
7. EXPLODED VIEWS ..................................................... 51
7-1. Cabinet Section ................................................................... 51
7-2. Mechanism Deck Section ...................................................52
8. ELECTRICAL PARTS LIST...................................... 53

–4 –
SECTION 1
SERVICING NOTE
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
Never look into the laser diode emission from right avove when
checking it for adustment. It is feared that you will lose your sight.
NOTES ON HANDLINGTHE OPTICAL PICK-UP BLOCK
(LCX-2R)
The laser diode in the optical pick-up block may suffer electrostatic
break-down easily. When handling it, perform soldering bridge to
the laser-tap on the flexible board. Also perform measures against
electrostatic break-down sufficiently before the operation. The
flexible board is easily damaged and should be handled with care.
OPTICAL PICK-UP FLEXIBLE BOARD
•When repairing this device with the power on, if you remove
the MAIN board or open the upper panel assy, this device stops
working.
In this case, you can work without the device stopping by fas-
tening the hook of the open/close detect switch (S801) with tape.
•This set is designed to perform automatic adjustment for each
adjustment and write its value to EEPROM. Therefore, when
EEPROM (IC802) has been replaced in service, be sure to per-
form automatic adjustment and write resultant values to the new
EEPROM.
(Refer to page 20.)
•Replacement of CXD2660R (IC502) and CXR701081 (IC801)
used in this set requires a special tool.Therefore, they cannot be
replaced.
laser-tap
Tape
S801
MAIN board

–5 –
SECTION 2
GENERAL This section is extracted from
instruction manual.

–6 –

–7 –

–8 –
Note : This set can be disassemble according to the following sequence.
SECTION 3
DISASSEMBLY
3-1. BLOCK ASSY, BOTTOM
3-2. PANEL BLOCK ASSY, UPPER
Note : Follow the disassembly procedure in the numerical order given.
Set Block Assy, Bottom Panel Block Assy, Upper LCD Module
Main Board MD Mechanism Deck Service Assy, OP
Motor Flexible Board Holder Assy
Motor, DC (M602)
“Motor, DC
(
M601
)
”, “Motor, DC
(
M603
)
”
1CN801
2
3
4screws (1.4)
5screws (1.4)
6panel block assy, upper
Note : When installing, fit the knobs (HOLD, SYNCHRO REC) and switches (S804, S807)
1lid, battery case
lid, battery case
6block assy, bottom
block assy, bottom
3screws (1.4)
knob (HOLD)
knob (SYNCHRO REC)
hinge
S807
S804
4screws (1.4)
2
5
Note:When installing the bottom block assy,
install the assy with the battery case lid open.
After it is installed, close the battery case lid.

–9 –
3-3. LCD MODULE
3-4. MAIN BOARD
1screws (1.7)
3LCD module
claws
2
4screw (1.4)
qs
5screw (1.4)
8screw (1.7)
6screws (1.7)
7stay
1CN601
qd CN501
3Remove the solder.
qa boss
qf MAIN boar
d
2CN602
9claws
0claws

–10 –
3-5. MD MECHANISM DECK
(MT-MZR70-165)
3-6. SERVICE ASSY, OP
3boss
4boss
chassis assy
5MD mechanism deck
(MT-MZR70-165)
1screw (1.4)
2screw (1.4)
9bearing
5screw
4rack spring
3precision pan screw
(M1.4)
1washer (0.8 - 2.5)
2gear (SA)
6screw
8Pull off the lead screw.
7
B
A
0Opening the over write head
toward the direction A, remove th
e
OP Service assy toward
the direction B.
Note: Do not open the entire assy
forcibly, when opening
the over write head.
over write head section

–11 –
3-7. HOLDER ASSY
2Remove two solders of
DC motor (over write head up/down) (M603).
1Remove four solders of
DC motor (sled) (M602).
3Remove four solders of
DC motor (spindle) (M601).
DC motor (sled)
circular hole
5motor flexible board
4adhesive sheet
Note: Align a circular hole in the stripping paper
with a circular hole in the DC motor (sled),
when mounting the motor
flexible board.
3-8. MOTOR FLEXIBLE BOARD
5Remove the holder assy to
direction of the arrow C.
1Open the holder assy.
A
B
3
C
2Push the convex portion
toward the direction Band
open the holder assy toward
the direction Ato erect uprightly.
4boss

–12 –
4two precision pan screws
(M1.4)
5DC motor (sled) (M602)
1Remove four solders of
motor flexible board.
2washer (0.8 - 2.5)
3gear (SA)
1Remove six solders of
motor flexible board.
4three precision pan screws
(M1.4)
qs DC motor (over write head up/down)
(M603)
6two precision pan screws
(M1.4)
qa gear chassis assy
0screw
(M1.2 ×1.5)
9gear (HA)
8gear (HB)
7washer (0.8 - 2.5)
2washer (0.8 - 2.5)
3gear (HC)
5DC motor
(spindle)
(M601)
DC motor
(over write head up/down)
(M603)
gear chassis assy
gear (HA)
2.65 mm
Note: Press-fit the gear (HA) up to the
position of the DC motor (over write
head up/down) (M603) as shown
below.
3-9. MOTOR, DC (M602)
3-10.“MOTOR, DC (M601)”, “MOTOR, DC (M603)”

–13 –
IC502
FB501
C530
25
26
28
32
36
1
47
118
116
119
120
117114113 112
115
110109 111
104108 106
104105 103
101102 100
144 146
37 46 47 50 53 56 59 64 68
42 45 48 51 55 57 60 63 66 67 145
88
88 87 86 83 81 78 74 72 69 64 63 60 58
90 89 85 84 80 77 75 71 68 65 62 59 57
93 92 91
96 95 94
99 98 97
82 79 76 73 70 67 66 61 55 56
52 53 54
49 50 51
46 47 48
43 45 44
40 41 42
37 36 39
34 35 36
32 33
26 28 31
25 29 30
19 22 27
21 23
20 24
10 1316
11 1417
12 1518
74
268
1359
85
82
78
76
73
89
86
83
80
90
87
84
81
77
74
72
79
75
43 44 49 52 54 58 61 62 65 69 70 71
38 40
39 41
AP508
AP504
AP505
R530
R529
C529
S804
HOLD
AP1001
L502
FB503FB502
FB504
BP801
AP519
AP830
AP521
OFF ON
R506
R503 R508 R509 R510
C537
R935
AP5209
AP806
C801 AP911
AP807 AP907
AP834
AP517
X801
AP511
AP516
1
2
0
9
AP506
1
0
3
2
AP804 AP803
AP507
8
05
IC802
IC801
81
54
– MAIN BOARD (SIDE B) –
BP801
SECTION 4
TEST MODE
4-1. OUTLINE
•This set provides the Overall adjustment mode (Assy mode) that
allows CD and MO disc to be automatically adjusted when in
the test mode. In this overall adjustment mode, the protect switch
is detected to judge the disc, CD or MO, and each adjustment is
automatically executed in order. If a fault is found, the system
displays its location. Also, the manual mode allows each indi-
vidual adjustment to be automatically adjusted.
•The keys in the description refer to the keys on both set and
remote commander unless otherwise specified. Though LCD
display shows the LCD of the remote commander, same con-
tents are also displayed on the LCD of the set.
4-2.TEST MODE
4-2-1. Setting Method of Test Mode
There are two different methods to set the test mode:
1Short BP801 (TEST) on the MAIN board with a solder bridge
(connect pin y; of IC801 to the ground). Then, turn on the
power.
2In the normal mode, turn on the HOLD switch on the set. While
pressing the xkey on the set, press the following remote
control keys in the following order:
>t>t.t.t>t.t
> t.tXtX
4-2-2. Operation in Setting the Test Mode
•When the test mode becomes active, first the display check mode
is selected. (Press xkey once, when the display check mode
is not active.)
•Other mode can be selected from the display check mode.
•When the test mode is set, the LCD repeats the following dis-
play.
LCD display
•When the Xkey is pressed and hold down, the display at that
time is held so that display can be checked.
4-2-3. Releasing theTest Mode
For test mode set with the method 1:
Turn off the power and open the solder bridge on BP801 (TEST)
on the MAIN board.
Note:Remove the solders completely. Remaining could be shorted with
the chassis, etc.
For test mode set with the method 2:
Turn off the power.
Note: If electrical adjustment (see page 20) has not been finished com-
pletely, always start in the test mode. (The set cannot start in nor-
mal mode.)
Microprocessor
version
display
All off
All lit xxxxxxxxx
V0.000
888
001
F1SHUF
REC

–14 –
4-2-4. Configuration of Test Mode
Note: *1) on the set
*2) on the remote commander
*3) on the set or remote commander
4-3. MANUAL MODE
Mode to adjust or check the operation of the set by function.
Normally, the adjustment in this mode is not executed.
•Transition method in Manual Mode
1. Setting the test mode. (See page 13)
2. Press the >or [VOL +] key activates the manual mode
where the LCD display as shown below.
3. The optical pick-up moves outward or inward while
the >or .key is pressed for several seconds respec-
tively.
4. Each test item is assigned with a 3-digit mode number;
100th place is a major item, 10th place is a medium item, and
unit place is a minor item.
[Manual Mode]
[Servo Mode]
[Audio Mode]
[Power Mode]
[OP Alignment Mode]
[Overall Adjustment Mode]
[Self-Diagnosis Displa Mode]
Press the > *
1) or [VOL +] *3) key
[Ke Check Mode]
[Test Mode $Displa Check Mode%]
Press the x *3) key
Press the x *3) key
Press the x *3) key
Press the x *3) key
Press the . *3) or [VOL --] *3) key
Press the N*1) or [REC] *1) or N > *2) key
press the [DISPLAY] *2) or MENU . *1) key
Press the [T MARK] *3) or [DISPLAY] *2) key
on the remote commander for several seconds.
Quit the key check or open the upper panel
[Sound Skip Check Result Displa Mode]
LCD display
Manual
000
[VOL +] key:100th place of mode number
increase.
[VOL --] key:100th place of mode number
decrease.
[Major item switching]
[VOL +] key:10th place of mode number
increase.
[VOL --] key:10th place of mode number
decrease.
[VOL +] key:Increases the
adjusted value
[VOL --] key:Decreases the
adjusted value
[Medium item switching]
N key x key
[Minor item switching]
[Adjusted value variation]
X key:When adjusted value is
changed:
Adjusted value is written.
When adjusted value is
not changed:
That item is adjusted
automatically.
[Adjusted value write]
N key
N key: Unit place of mode number
increase.
x key

–15 –
5. The display changes a shown below each time the jog key on
the set is turned up or [DISPLAY] key on the remote com-
mander is pressed.
However in the power mode (mode number 700’s), only the
power adjustment value is displayed.
6. Quit the manual mode, and press xkey to return to the test
mode (display check mode).
AD 85
731
•Power Supply Adjusted Value
LCD display
mode number
fixed display
adjusted value
4-4. OVERALL ADJUSTMENT MODE
Mode to adjust the servo automatically in all items.
Normally, automatic adjustment is executed in this mode at the
repair.
Adjust the CD first, when performing adjustment.
•Configuration of overall adjustment
For further information, refer to the Section 5 Electrical Adjust-
ment. (See page 20)
•Address & Adjusted Value Display
LCD display
•Jitter Value & Adjusted Value Display
LCD display
•Block Error Value & Adjusted Value Display
LCD display
•ADIP Error Value & Adjusted Value Display
LCD display
•Item Title Display
LCD display
C68S01
011
063B01
011
059A01
011
LrefP 01
011
0FFJ01
011
mode number
address
adjusted value
mode number
jitter value
adjusted value
mode number
block error value
adjusted value
mode number
ADIP error value
adjusted value
adjusted value
mode number
item title
> key . key
> key
Title
display
CD overall
adjusting
CD overall
adjustment
OK
MO overall
adjusting
MO overall
adjustment
OK
CD overall
adjustment
NG
MO overall
adjustment
NG
N key
protect switch ON
All item
OK
protect switch OFF
NG item exists
or x key
NG item exists
or x key
x key
x key
x key
x key
[Test mode $displa check mode%]

–16 –
4. When [REC] key on the set is pressed, the total of error count
is displayed on the LCD, and each time the >key is pressed,
the error count descents one by one as shown below. Also,
when .key is pressed, the error count ascends by one.
If Nkey is pressed, the error count during play is displayed.
** : Sound skip check items counter (hexadecimal)
###### : 6-digit address (hexadecimal) where a sound skipped
last
Error code
Cause of error Description of error
EIB Sound error correction error
Playback Stat Decorder status error
Adrs Cannot access the address
BEmp Buffer becomes empty
BOvr Buffer becomes full and sounds are
dumped
Recording Bful Buffer capacity lowers and data are
forcibly written
Rtry Retry count over
5. Quit the sound skip check result display mode, and press
the xkey to return to the test mode (display check mode).
4-5.SOUND SKIP CHECK RESULT DISPLAY MODE
This set can display and check the error count occurring during
record and play.
•Setting method of Sound Skip Check Result Display
Mode
1. Setting the test mode. (See page 13)
2. Press the Nor [REC] key on the set activates the sound skip
check result display mode where the LCD displays as shown
below.
When Nor [REC] key on the set is pressed:
3. When Nkey or N>key on the remote commander is
pressed, the total of error count is displayed on the LCD, and
each time the >key is pressed, the error count descents
one by one as shown below. Also, when .key is pressed,
the error count ascends by one. If [REC] key on the set is
pressed, the error count during record is displayed.
** : Sound skip check items counter (hexadecimal)
###### : 6-digit address (hexadecimal) where a sound skipped
last
LCD display
P**R**
000
Total of play system error count
Total of record system
error count
Stat**
000
Adrs**
000
BEmp**
000
######
000
P**R**
000
EIB **
000
Bful**
000
Rtry**
000
######
000
P**R**
000
BOvr**
000

–17 –
4-6. SELF-DIAGNOSIS DISPLAY MODE
•This set uses the self-diagnosis system in which if an error oc-
curs in recording/playback mode, the error is detected by the
model control and power control blocks of the microprocessor
and information on the cause is stored as history in EEPROM.
By viewing this history in test mode, it helps you to analyze a
fault and determine its location.
Total recording time has been recorded as optical pick-up using
time, and it is compared with the total recording time in the
self-diagnosis display mode to find when an error occurred.
Clear both total recording time and the time in self-diagnosis
display mode, when the optical pick-up was replaced.
1. Setting the test mode. (See page 13)
2. Press the MENU .key on the set or press the [DISPLAY]
key on the remote commander activates the self-diagnosis dis-
play mode where the LCD display as shown below.
3. Then, each time >key is pressed, LCD display descends
by one as shown below. Also, the LCD display ascends by one
when . key is pressed.
4. Quit the self-diagnosis display mode, and press the xkey to
return to the test mode (display check mode).
LCD display
** : Self-Diagnosis Data
1st0**
000
history code
1st0**
000
1st1**
000
1st2**
000
N 0**
000
N 1**
000
N 2**
000
N-10**
000
N-11**
000
N-12**
000
N-20**
000
N-21**
000
N-22**
000
R ####
000
1
1

–18 –
•Description of Indication History
History code number Description
1st0 The first error
1st1 Total recording time when 1st0 was generated (Higher rank byte)
1st2 Total recording time when 1st0 was generated (Lower rank byte)
N 0 The last error
N 1 Total recording time when N 0 was generated (Higher rank byte)
N 2 Total recording time when N 0 was generated (Lower rank byte)
N-10 One error before the last.
N-11 Total recording time when N-10 was generated (Higher rank byte)
N-12 Total recording time when N-10 was generated (Lower rank byte)
N-20 Two errors before the last.
N-21 Total recording time when N-20 was generated (Higher rank byte)
N-22 Total recording time when N-20 was generated (Lower rank byte)
REC Total recording time *
•Description of Error Indication Codes
4-6-1. Clearing Self-Diagnosis Data andTotal RecordingTime
1. Setting the test mode. (See page 13.)
2. Move up the jog key on the set or press the [DISPLAY] key on the remote commander activates the self-diagnosis display mode.
3. Press the Xkey or [REC] key on the set during display of self-diagnosis data when clearing the self-diagnosis data, or during display of
total recording time when clearing the total recording time.Thus, “ClrOK?”will be displayed on the LCD, and press the same key again,
and when self-diagnosis data is cleared “ErrCLR”is displayed and the data is cleared.Also when total recording time is cleared, “RecT
O”is displayed and it is cleared.
* Total recording time
Total recording time is recorded in
minutes. It is recorded in hexadecimal
format and up to 65,535 min. can be
counted. It returns to “0000h”when
recorder goes beyond this limit.
Problem Indication code Meaning of code Description
No error 00 No error
01 Illegal access target address Attempt to access an abnormal address
was specified
Servo error 02 High temperture High temperture
03 Focus error Forcus could not be applied
04 Spindle error Abnormal lotation of disc
Power error 22 Low battery Momentary interruption detected

–19 –
4-7. KEY CHECK MODE
This set can check if the set and remote commander function nor-
mally.
•Setting Method of Key Check Mode
1. Setting the test mode. (See page 13)
2. Press the [T MARK] or [DISPLAY] key on the remote com-
mander for several seconds activates the key check mode where
all segments of LCD turn OFF. (At the last two digits of DOT
section, AD value of remote commander key line is displayed
in hexadecimal)
3. When each key is pressed, it is displayed on the LCD, imply-
ing that it was successfully checked as shown below. How-
ever, for the slide switch on the set, it is not checked unless it
is reciprocated.
* The key pressed to enter the key check mode was already
checked at that time.
Set key
Key Indication
NPLAY
>FF
.FR
XPAUSE
VOL+ VOL +
VOL –VOL–
xSTOP
REC REC
END SEARCH END S
MENU .JOG+
MENU >JOG–
ENTER PUSH
T MARK T MARK
HOLD (hold) HLDon
HOLD (off) HLDoff
SYNCHRO REC (on) SYCon
SYNCHRO REC (off) SYCoff
Remote commander key
Key Indication
N/>rPLAY
.rFR
XrPAUSE
VOL + rVOL +
VOL –rVOL –
xrSTOP
PLAYMODE rPMODE
DISPLAY rDISP
HOLD (hold)
HOLD (off)
4. The test mode (display check mode) is automatically activated
when all keys on the set and remote commander were checked
(see above). Also, the test mode (display check mode) gets
back if opening the upper panel during a key check.

– 20 –
SECTION 5
ELECTRICAL ADJUSTMENTS
5-1. OUTLINE
• In this set, automatic adjustment of CD and MO can be per-
formed by entering the test mode. (See page 13)
However, before starting automatic adjustment, the memory
clear, power adjustment and temperature adjustment must be
performed in the manual mode.
• The keys in the description refer to the keys on both set and
remote commander unless otherwise specified.
Though LCD display shows the LCD of the remote commander,
same contents are also displayed on the LCD of the set.
5-2. PRECAUTIONS FOR ADJUSTMENT
1. Adjustment must be done in the test mode only.
After adjusting, release the test mode.
2. Use the following tools and measuring instruments.
• Test CD disc TDYS-1
(Part No. : 4-963-646-01)
• SONY MO disc available on the market
• Laser power meter LPM-8001
(Part No. : J-2501-046-A)
• Digital voltmeter
3. Unless specified otherwise, supply DC 3V from the DC IN 3V
jack.
4. Switch position
HOLD switch ................OFF
5-3. ADJUSTMENT SEQUENCE
Adjustment must be done with the following steps.
1. NV Reset (Memory clear)
r
2. Power Supply Manual Adjustment Manual Mode
r
3. Temperature correction
r
4. CD Overall Adjustment
rOverall Mode
5. MO Overall Adjustment












5-4. NV RESET
• Setting method of NV reset
1. Select the manual mode of test mode, and set mode num-
ber 021NV Reset.
2. Press the Xkey.
3. Press the Xkey once more.
rNV reset (after several seconds)
4. Quit the manual mode, and activate the test mode.
5-5. POWER SUPPLY MANUAL ADJUSTMENT
• Adjustment sequence
Adjustment must be done with the following steps.
1. VC PWM Duty (L) adjustment (mode number: 762)
r
2. VREM PWM Duty (H) adjustment (mode number: 763)
r
3. VREM PWM Duty (L) adjsutment (mode number: 764)
r
4. VC PWM Duty (H) adjustment (mode number: 765)
r
5. VREM PWM Duty (H) adjustment (mode number: 766)
r
6. VREM PWM Duty (L) adjustment (mode number: 767)
LCD display
ResNV
021
LCD display
ResOK?
021
LCD display
Res***
021
Reset!
021
Ver 1.3 2001. 01