Sony MZ-R501 User manual

Category
Minidisc players
Type
User manual

This manual is also suitable for

1
MZ-R501/R501PC
SERVICE MANUAL
Model Name Using Similar Mechanism MZ-R500
Mechanism Type MT-MZR500-172
Optical Pick-up Name LCX-4R
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
When using MDW-80
Maximum 160 min. in monaural
Maximum 320 min. in stereo
Revolutions
350 rpm to 2,800 rpm (CLV)
Error correction
ACIRC (Advanced Cross Interleave Reed
Solomon Code)
Sampling frequency
44.1 kHz
Sampling rate converter
Input: 32 kHz/44.1 kHz/48 kHz
Coding
ATRAC (Adaptive TRansform Acoustic
Coding)
ATRAC3-LP2
ATRAC3-LP4
SPECIFICATIONS
Modulation system
EFM (Eight to Fourteen Modulation)
Number of channels
2 stereo channels
1 monaural channel
Frequency response
20 to 20,000 Hz ± 3 dB
Wow and Flutter
Below measurable limit
Inputs
Line in: stereo mini-jack, minimum input
level 49 mV
Optical (Digital) in: optical (digital) mini-
jack
Outputs
i: stereo mini-jack, maximum output level
5 mW + 5 mW, load impedance 16 ohm
General
Power requirements
Sony AC Power adaptor connected at the
DC IN 3 V jack
120 V AC, 60 Hz (US, Canadian model)
230 V AC, 50/60 Hz (AEP model)
230 – 240 V AC, 50 Hz (UK model)
100 – 240 V AC, 50/60 Hz (E model)
220 V AC, 50 Hz (Chinese, Argentina
model)
One LR6 (size AA) alkaline dry battery (not
supplied)
– Continued on next page –
US Model
Canadian Model
AEP Model
UK Model
Chinese Model
MZ-R501
E Model
East European Model
MZ-R501/R501PC
US and foreign patents licensed from Dolby
Laboratories.
Ver 1.0 2001. 01
PORTABLE MINIDISC RECORDER
Ver 1.1 2002. 03
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
9-873-408-02
2002C0400-1
© 2002. 03
Photo: Silver
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.
Battery operation time
Battery life1) (Unit: approx.hours) (JEITA2))
LR6 (SG) alkaline dry battery3) Normal LP2 LP4
Recording4) 7.5 10 13.5
Playback 36 42 48
1) The battery life may be shorter due to operating conditions, the
temperature of the location, and varieties of batteries.
2) Measured value by the standard of JEITA (Japan Electronics and
Information Technology Industries Association).
3) When using a Sony LR6 (SG) “STAMINA” alkaline dry battery
(produced in Japan).
4) To prevent interrupted recording due to drained battery, use new
battery for recording operations.
Dimensions
Approx. 83.0 × 27.8 × 75.8 mm (w/h/d)
(3 3/8 × 1 1/8 × 3 in.) without projections.
Mass
Approx. 113 g (4.0 oz) the recorder only
Supplied accessories
AC power adaptor (except R501: US, Canadian, E model) (1)
Headphones/earphones (1)
Optical cable (except R501: US, E model) (1)
Design and specifications are subject to change
without notice.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 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.
MZ-R501/R501PC
Ver 1.1
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR 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
Looking at the Controls ...................................................... 5
3. DISASSEMBLY
3-1. Case (Lower) Assy .............................................................. 6
3-2. Case (Upper) Assy .............................................................. 6
3-3. LCD Module ....................................................................... 7
3-4. Main Board ......................................................................... 7
3-5. MD Mechanism Deck ......................................................... 8
3-6. Service Assy, OP ................................................................. 8
3-7. Holder Assy......................................................................... 9
3-8. Motor Flexible Board .......................................................... 9
3-9. DC Motor (M602) ............................................................. 10
3-10. DC Motor (M601), DC Motor (M603) ............................. 10
4. TEST MODE
4-1. Outline............................................................................... 11
4-2. Setting Method of Test Mode ............................................ 11
4-3. Operation in Setting the Test Mode................................... 11
4-4. Releasing the Test Mode ................................................... 11
4-5. Configuration of Test Mode .............................................. 12
4-6. Manual Mode .................................................................... 12
4-7. Overall Adjustment Mode ................................................. 13
4-8. Self-Diagnosis Result Display Mode ................................13
4-9. Reset the Error Display Code............................................ 14
4-10. Sound Skip Check Result Display Mode .......................... 15
4-11. Key Check Mode............................................................... 15
TABLE OF CONTENTS
5. ELECTRICAL ADJUSTMENTS
5-1. Outline............................................................................... 17
5-2. Precautions for Adjustment ............................................... 17
5-3. Adjustment Sequence ........................................................ 17
5-4. NV Reset ........................................................................... 17
5-5. Power Supply Manual Adjustment.................................... 18
5-6. Temperature Correction..................................................... 19
5-7. Laser Power Check ........................................................... 19
5-8. Overall Adjustment Mode ................................................. 20
5-9. Mode Settings ................................................................... 22
5-10. Resume Clear .................................................................... 23
6. DIAGRAMS
6-1. IC Pin Function Description ............................................ 24
6-2. Block Diagram – Servo Section – ..................................... 30
6-3. Block Diagram – Audio Section – .................................... 31
6-4. Block Diagram – System Control/Power Section – ..........32
6-5. Printed Wiring Board – Main Section – ............................ 34
6-6. Schematic Diagram – Main Section (1/3) – ...................... 36
6-7. Schematic Diagram – Main Section (2/3) – ...................... 37
6-8. Schematic Diagram – Main Section (3/3) – ...................... 38
7. EXPLODED VIEWS
7-1. Panel Section..................................................................... 43
7-2. Chassis Section ................................................................. 44
7-3. MD Mechanism Deck Section .......................................... 45
8. ELECTRICAL PARTS LIST...................................... 46
MZ-R501/R501PC
4
MZ-R501/R501PC 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 above when
checking it for adjustment. It is feared that you will lose your sight.
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
(LCX-4R)
The laser diode in the optical pick-up block may suffer electro-
static break-down easily. When handling it, perform soldering
bridge to the laser-tap on the flexible board. Also perform mea-
sures against electrostatic break-down sufficiently before the op-
eration. The flexible board is easily damaged and should be handled
with care.
OPTICAL PICK-UP FLEXIBLE BOARD
In performing the repair with the power supplied to the set,
removing the MAIN board causes the set to be disabled.
In such a case, fix a convex part of the open/close detect switch
(S806 on MAIN board) with a tape in advance.
Handle the FLEXIBLE board (overwrite head) with care, as it
has been soldered directly to the MAIN board.
In repairing the component side of MAIN board, connect the
FLEXIBLE board (overwrite head) and the MAIN board with
the lead wires in advance. (See page 7)
Replacement of CDX2671-204GA (IC801) used in this set
requires a special tool.
On the set having the microcomputer version 1.000, some
adjusted values were set in the manual mode at the shipment,
but these data will be cleared when the NV is reset. Therefore,
on the set having the microcomputer version 1.000, change the
adjusted values following the Change of Adjusted Values
immediately after the NV was reset. (See page 17)
laser-tap
S806 MAIN board
FLEXIBLE board
(Over write head)
Tape
panel assy, upper
5
MZ-R501/R501PC
SECTION 2
GENERAL This section is extracted from
instruction manual.
Looking at the controls
See pages in ( ) for more details.
The recorder
AN button (11) (13) (17) (25)
BVOL +/ buttons (13) (26)
Cx button (11) (13) (27)
DX button (11) (13) (20) (26) (29)
EHOLD switch (at the rear) (9) (25)
FSELECT >/. buttons (16)
(23) (26)
./> (search /AMS) buttons
(11) (13) (26) (29)
GMENU/ENTER button (16) (23) (26)
HOPEN switch (9)
IDisplay window (18) (23)
JEND SEARCH button (11) (26)
KT MARK button (28)
REC (record) button (11) (17)
Li (headphones) jack (9) (25)
MBattery compartment (at the rear) (8)
NLINE IN (OPTICAL) jack (10) (16)
ODC IN 3V jack (10) (31)
A
C
B
E
D
F
G
I
J
K
H
O
N
M
L
The display window
AMONO (monaural) indication
BLP mode indication (17)
CDisc indication
Shows that the disc is rotating for
recording, playing or editing an MD
DMega bass indication (24).
EREC indication
Lights up while recording. When
flashing, the recorder is in record
standby mode.
FSYNC (synchro-recording) indication
(18)
GLevel meter (21)
Shows the volume of the MD being
played or recorded.
HREC REMAIN/REMAIN(remaining
time/tracks) indication (21) (24)
Lights up along with the remaining
time of the track, the remaining time
of the MD, or the remaining number
of tracks.
IBattery indication (9)
Shows approximate battery condition.
JTime display
KDisc name/track name indication
Lights up when labeling a disc or a
track.
LCharacter information display (21)
(25)
Displays the disc and track names,
error messages, track numbers, etc.
MPlay mode indication (23)
Shows the play mode of the MD.
LM
K
LP2.4
Digital
MEGA BASS
CAB D
JI
FG H
E
6
MZ-R501/R501PC
3-1. CASE (LOWER) ASSY
(Page 6)
3-2. CASE (UPPER) ASSY
(Page 6)
3-4. MAIN BOARD
(Page 7)
3-5. MD MECHANISM DECK
(Page 8)
3-6. SERVICE ASSY, OP
(Page 8)
3-7. HOLDER ASSY
(Page 9)
SET
3-10. DC MOTOR (M601)
(Page 10)
3-3. LCD MODULE
(Page 7)
3-9. DC MOTOR (M602)
(Page 10)
3-8. MOTOR FLEXIBLE BOARD
(Page 9)
DC MOTOR (M603)
(Page 10)
Note : This set can be disassemble according to the following sequence.
SECTION 3
DISASSEMBLY
3-2. CASE (UPPER) ASSY
Note : Follow the disassembly procedure in the numerical order given.
3-1. CASE (LOWER) ASSY
2
screw (1.7), MI
1
screw (1.7), MI
3
screws (1.7), MI
knob (hold)
6
case(lower) assy
4
claw
5
1
screws (1.7), M
I
3
case (upper) assy
2
CN801
4
spring (POP-L), torsion
spring (POP-L), torsion
chassis assy
7
MZ-R501/R501PC
3-3. LCD MODULE
3-4. MAIN BOARD
1
screws (1.7x3), tapping
4
LCD module
claws
case (upper) ass
y
2
screws (1.7x3), tapping
3
3
screws (M1.4x2),
toothed lock
4
screws (M1.4x2),
toothed lock
7
2
Remove the solders
0
Remove the solder
6
claw
qs
Remove the solder
qa
terminal (+), battery
qd
terminal (-), battery
1
CN701
9
MAIN boar
d
8
CN501
5
screw (M1.4x2),
toothed lock
8
MZ-R501/R501PC
3-5. MD MECHANISM DECK
3-6. SERVICE ASSY, OP
1screws (1.7), MI
2chassis assy, se
t
boss
3MD mechanism deck
4
spring (S), rack
6
spring, thrust detent
3
precision pan screw
(M1.4)
5
precision pan screw
(M1.4)
1
washer (0.8 - 2.5)
2
gear (SA)
8
Pull off the lead screw.
7
B
A
9
Opening 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
9
MZ-R501/R501PC
3-7. HOLDER ASSY
3-8. MOTOR FLEXIBLE BOARD
4Remove the holder assy to
direction of the arrow B.
1Open the holder assy.
A
2
B
3boss
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).
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.
10
MZ-R501/R501PC
3-9. DC MOTOR (M602)
3-10. DC MOTOR (M601), DC MOTOR (M603)
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 chassis assy, gear
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.
11
MZ-R501/R501PC
2In the normal mode, turn on the [HOLD] switch. While press-
ing the [VOL --] key press the following order:
>t>t.t.t>t
.t > t.tXtX
SECTION 4
TEST MODE
4-3. Operation in Setting the Test Mode
When the test mode becomes active, first the display check mode
is selected.
Other mode can be selected from the display check mode.
When the test mode is set, the LCD repeats the following dis-
play.
When the Xkey is pressed and hold down, the display at that
time is held so that display can be checked.
4-4. Releasing the Test Mode
For test mode set with the method 1:
Turn off the power and open the solder bridge on TAP801 (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 17) has not been finished
completely, always start in the test mode. (The set cannot
start in normal mode)
4-1. Outline
This set provides the Overall adjustment mode that allows CD
and MO discs to be automatically adjusted when in the test mode.
In this overall adjustment mode, the disc is discriminate between
CD and 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 individual adjustment to be auto-
matically adjusted.
4-2. Setting Method of Test Mode
There are two different methods to set the test mode:
1Short TAP801 (TEST) on the MAIN board with a solder bridge
(connect pin 3 of IC801 to the ground). Then, turn on the
power.
All lit
This set LCD display
All off
Microcomputer
version
display
SYNCMONO REC REMAIN
SHUFREC
u
1F
-a 8 8 : 8 8
00 6V1.300
R806
R807
C521
R805
R811
C808
R810
R830
C807
FB801
C815
C830
AP856
AP803
AP528
AP526
TAP801
(TEST)
AP802
AP531
AP530
AP529
MAIN BOARD (SIDE B)
12
MZ-R501/R501PC
4-5. Configuration of Test Mode
4-6. Manual Mode
Mode to adjust or check the operation of the set by function.
Normally, the adjustment in this mode is not executed.
However, the Manual mode is used to clear the memory, power
supply adjustment, and laser power check before performing
automatic adjustments in the Overall Adjustment mode.
Transition method in Manual Mode
1. Setting the test mode (see page 11).
2. Press the >or[VOL +] key activates the manual mode where
the LCD display as shown below.
3. During each test, the optical pick-up moves outward or in-
ward while the >or .key is pressed for several sec-
onds respectively.
4. Each test item is assigned with a 3-digit item number;
100th place is a major item, 10th place is a medium item, and
unit place is a minor item.
The values adjusted in the test mode are written to the
nonvolatile memory (for the items where adjustment was
made).
Press the > or VOL+ key
Press the x key
Press the x key
Press the x key
Press the x key
Press the N or T.MARK + N keys.
The key check quits,or open the upper panel
Press the T.MARK + X keys.
ENTER key
Test mode (Display Check Mode)
Servo Adjustment
Manual Mode
Key Check Mode
Audio Adjustment
Power Supply Adjustment
OP Alignment Adjustment
Press the . or VOL– key
Electrical Offset Adjustment
Overall Adjustment Mode
Sound Skip Check Result Display Mode
Self-Diagnosis Result Display Mode
Power Supply Adjustment
Auto item Feed
CD Overall Adjustment/
MO Overall Adjustment
This set LCD display
0 0 0
Manual
x key N key
x key N key
Major item switching
Minor item switching
Medium item switching
. key: Unit Place of item number
decrease.
VOL key: 10th Place of item number
decrease.
VOL + key: 10th Place of item number
increase.
VOL key: Decreases the
adjusted value
VOL + key: Increases the
adjusted value
VOL key: 100th Place of item number
decrease.
VOL + key: 100th Place of item number
increase.
N key: Unit Place of item number
increase.
X key: When adjusted value is
chaged:
Adjusted value is written.
When adjusted value is
not changed:
That item is adjusted
automatically.
Adjusted value variation
Adjusted value write
13
MZ-R501/R501PC
4-8. Self-Diagnosis Result Display Mode
This set uses the self-diagnostic function system in which if an
error occurred during the recording or playing, the mechanism
control block and the power supply control block in the
microcomputer detect it and record its cause as history in the
nonvolatile memory.
By checking this history in the test mode, you can analyze a fault
and determine its location.
Total recording time is recorded as a guideline of how long the
optical pickup has been used, and by comparing it with the total
recording time at the time when an error occurred in the self-
diagnosis result display mode, you can determine when the error
occurred.
Clear both self-diagnosis history data and total recording time, if
the optical pickup was replaced.
Self-Diagnosis Result Display Mode Setting Method
1. Setting the test mode (see page 11).
2. In the display check mode, press the [ENTER] key activates the
self-diagnosis result display mode where the LCD display as
shown below.
3. Then, each time the >key is pressed, LCD display descends
by one as shown below. Also, the LCD display ascends by one
when the .key is pressed.
4. Quit the self-diagnosis result display mode, and press the xkey
to return to the test mode (display check mode).
5. The display changes a shown below each time the
[ENTER] key on the set is pressed.
However in the power mode (item number 700s), only the
item is displayed.
6. Quit the manual mode, and press the xkey to return to the
test mode (display check mode).
4-7. Overall Adjustment Mode
Mode to adjust the servo automatically in all items.
Normally, automatic adjustment is executed in this mode at the
repair.
For further information, refer to Section 5 Electrical Adjustments
(see page 17).
This set LCD display
item number adjustment valu
e
address
Address & Adjusted Value Display
This set LCD display
jitter value
Jitter Value & Adjusted Value Display
This set LCD display
Block Error Value & Adjusted Value Display
This set LCD display
ADIP Error Value & Adjusted Value Display
This set LCD display
Item Title Display
0 11
3A4S1D
item number adjustment valu
e
0 11
OFEJ1D
item number adjustment valu
e
block error value
0 11
063B1D
item number adjustment valu
e
ADIP error value
0 11
072A1D
item number item title
0 11
LrefPw
This set LCD display
error
display code
history code
Total recording time
when error occurred
0 XX
1 0000
0 XX1
0 XXN
0 XXN1
0 XXN2
0 XXR_
XX
:Error code
:Total recording time
14
MZ-R501/R501PC
• Description of Indication History
History code number Description
1 The first error
N The last error
N1 One error before the last.
N2 Two errors before the last.
R_ Total recording time
4-9. Reset the error display code
After servicing, reset the error display code.
Setting method of Reset the Error Display Code
1. Setting the test mode (see page 11).
2. Press [ENTER] key activates the self-diagnosis result display
mode.
3. To reset the error display code, press the Xkey (2 times) when
the code is displayed (except R_****).
(All the data on the 1, N, N1, and N2 will be reset)
• Description of Error Indication Codes
Problem Indication code Meaning of code Simple display Description
No error 00 No error --- No error
01 Illegal access target Adrs Attempt to access an abnormal address
address was specified
Servo system error 02 High temperature Temp High temperature
03 Focus error Fcus Disordered focus
04 Spindle error Spdl Abnormal rotation of disc
TOC error 11 TOC error TOC Faulty TOC contents
12 Data reading error Data Data could not be read at SYNC
Power supply system error 22 Low battery LBat Momentary interruption detected
31 Offset error Ofst Offset error
32 Focus error ABCD ABCD Focus error ABCD offset error
offset error
Offset system error 33 Tracking error TE Tracking error Offset error
Offset error
34 X1 tracking error X1TE X1 tracking error Offset error
Offset error
15
MZ-R501/R501PC
4-11. Key Check Mode
This set can check if the set function normally.
• Setting Method of Key Check Mode
1. Setting the test mode (see page 11).
2. Press the [T.MARK] + X keys activates the key check mode.
(At the last two digits, AD value of remote commander key
line is displayed in hexadecimal)
3. When each key on the set and on remote commander is pressed,
its name is displayed on the LCD. (The operated position is
displayed for 4 seconds after the slide switch is operated. If
any other key is pressed during this display, the remote com-
mander LCD switches to its name display)
Example1: When >key on the set is pressed:
4-10. Sound Skip Check Result Display Mode
This set can display the count of errors that occurred during the
recording/playing for checking.
Setting method of sound skip check result display
mode
1. Set the test mode (see page 11).
2. Press the Nkey or [T.MARK] + Nkeys, and the playing
or recording sound skip result display mode becomes
active respectively where the LCD displays the following.
3. When the Nkey is pressed, total error count is displayed on
the LCD, and each time the >key is pressed, the display
item moves down by one as shown below. Also, if the .key
is pressed, the display item moves up by one, then if the
[T.MARK] + Nkeys is pressed, the display in the record
mode appears.
When the [T.MARK] + Nkeys is pressed, total error count
is displayed on the LCD, and each time the >key is pressed,
the display item moves down by one as shown below. Also, if
the .key is pressed, the display item moves up by one,
then if the Nkey is pressed, the display in the play mode
appears.
Total count record
system errors(hex.)
Total count of play
system errors(hex.)
This set LCD display
0 00
P R
• Cause of Sound Skip Error
Cause of error Description of error
EIB Sound error correction error
Play Stat Decoder status error
Adrs Address access error
BEmp Buffer is empty
BOvr Buffer is full, and sounds were
dumped
Record Bful Buffer capacity becomes less,
and forcible writing occurred
Rtry Retry times over
4. To quit the sound skip check result display mode and to return
to the test mode (display check mode), press the xkey.
0 00 P R
P R
0 00 EIB
0 00 Stat
0 00 Adrs
0 00 BEmp
0 00 ######
######
0 00 P R
0 00 BOvr
0 00 Bful
0 00 Rtry
0 00 ######
Playing sound skip
result display
Recording sound skip
result display
:Total play/record errors(hex.)
:Counter of sound skip check each item(hex.)
:6-di
g
it address where sound was ski
pp
ed last
(
hex.
)
16
MZ-R501/R501PC
4. When all the keys on the set and on the remote commander are
considered as OK, the following displays are shown for 4 sec-
onds.
Example1: When the keys on the set are considered as OK:
5. When all keys were checked or if the upper panel is opened,
the key check mode quits and the test mode (display check
mode) comes back.
This set LCD display
8 8 8
RMC OK
17
MZ-R501/R501PC
Setting method of NV reset
1. Select the manual mode of the test mode, and set item number
021NV Reset (see page 12).
2. Press the Xkey.
3. Press the Xkey once more.
4. Press the xkey to quit the manual mode, and activate the
test mode (display check mode).
Change of Adjusted Values
1. Item numbers in which the adjusted values are to be modified
Item number 832
Item number 862
Item number 871
Item number 872
2. Adjusted values modifying procedure
1) Select the manual mode of the test mode, and set item number
832 (see page 12).
2) Adjust with the [VOL+] key (adjusted value up) or [VOL--]
key (adjusted value down) so that the adjusted value becomes
E4.
3) Press the Xkey to write the adjusted value.
4) Select the manual mode of the test mode, and set item number
862 (see page 12).
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 11).
However, before starting automatic adjustment, the memory
clear, power supply adjustment, and laser power check must be
performed in the manual mode.
A key having no particular description in the text, indicates a
set key.
For the LCD display, the LCD display on the set is shown.
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
Digital voltmeter
Laser power meter LPM-8001
(Part No. : J-2501-046-A)
Thermometer (using the Temperature Correction)
3. Unless specified otherwise, supply DC 3V from the DC IN
3V jack (J601).
4. Switch position
HOLD switch ............................................... OFF
5-3. Adjustment Sequence
5-4. NV Reset
Caution: In this set, certain adjustment values are set in the manual
mode at the factory. NV Reset will cause these data to
be cleared. So, the adjustment values should be set again
just after NV Reset is made.
1. NV Reset(Memory clear)
2. Power Supply Manual Adjustment
3. Temperature Correction(item number:014)
4. Laser Power Check
5. Electrical offset Adjustment
Caution: This adjustment must be made with
no disc loaded.
6. CD Overall Adjustment
7. MO Overall Adjustment
8. Mode Settings
9. RESUME Clear
Manual Mode
Manual Mode
Manual Mode
Overall Mode
Overall Mode
This set LCD display
NV reset(after several seconds)
0 2 1
Res
0 2 1
Reset!
This set LCD display
8 3 2 Pw-T W
18
MZ-R501/R501PC
Setting method of power supply manual adjustment
1. Make sure that the power supply voltage is 3V.
2. Set the test mode (see page 11).
3. Press the .or [VOL--] key to activate the overall adjustment
mode.
4. Press the [END SEARCH] key. (the [END SEARCH] key causes
the item number to be switched to 762.)
Adjustment method of Vc PWM Duty (L)
(item number: 762)
1. Press the [ENTER] key and set the address & adjusted value
display (see page 13).
2. Connect a digital voltmeter to the TP902 (VC) on the MAIN
board, and adjust [VOL +] key (voltage up) or [VOL --] key
(voltage down) so that the voltage becomes 2.40 ± 0.01 V.
3. Press the Xkey to write the adjusted value.
(The item number changes to 763 when Xkey is pressed)
Adjustment and Connection Location:MAIN board
(see page 20)
Adjustment method of Vc PWM Duty (H)
(item number: 763)
1. Press the [ENTER] key and change the LCD display.
5) Adjust with the [VOL+] key (adjusted value up) or [VOL--]
key (adjusted value down) so that the adjusted value becomes
01.
6) Press the Xkey to write the adjusted value.
7) Select the manual mode of the test mode, and set item number
871 (see page 12).
8) Adjust with the [VOL+] key (adjusted value up) or [VOL--]
key (adjusted value down) so that the adjusted value becomes
20.
9) Press the Xkey to write the adjusted value.
10) Select the manual mode of the test mode, and set item number
872 (see page 12).
11) Adjust with the [VOL+] key (adjusted value up) or [VOL--]
key (adjusted value down) so that the adjusted value becomes
39.
12) Press the Xkey to write the adjusted value.
5-5. Power Supply Manual Adjustment
Adjustment sequence
Adjustment must be done with the following steps.
2. Vc PWM Duty (H) adjustment (item number 763)
3. Vl PWM Duty adjustment (item number 764)
1. Vc PWM Duty (L) adjustment (item number 762)
digital
voltmeter
MAIN board
TP902(VC)
TP910(GND)
: Address
01: Adjusted value
This set LCD display
8 6 2 S01
This set LCD display
8 7 1 V5num
: Address
20: Adjusted value
This set LCD display
8 7 1 S20
This set LCD display
8 7 2 V5dat
: Address
39: Adjusted value
This set LCD display
8 7 2 S39
This set LCD display
0 0 0 Assy11
This set LCD display
7 6 2 Vc1PWM
This set LCD display
7 6 2 AD
: Adjusted value
This set LCD display
7 6 3
VchPWM
This set LCD display
7 6 3 AD
: Adjusted value
19
MZ-R501/R501PC
3. Adjust with [VOL +], [VOL --] key so that the adjusted value
(hexadecimal value) becomes the ambient temperature.
(Initial value: 14h = 20 °C, Adjusting range: 80h to 7fh (128
°C to +127 °C)
4. Press the Xkey to write the adjusted value.
5-7. Laser Power Check
Connection :
Checking Method :
1. Select the manual mode of test mode (see page 12), and set the
laser power adjusting mode (item number 010).
2. Press the .key continuously until the optical pick-up
moves to the most inward track.
3. Open the cover and set the laser power meter on the objective
lens of the optical pick-up.
4. Press the Nkey, and set the laser MO read adjustment mode
(item number 011).
5. Press the [ENTER] key and set the address & adjusted value
display (See page 13).
6. Check that the laser power meter reading is 0.81 ± 0.08 mW.
7. Check that the voltage both ends (TP (+) and TP ()) of resis-
tor R501 at this time is below 44 mV.
2. Connect a digital voltmeter to the TP902 (VC) on the MAIN
board, and adjust [VOL +] key (voltage up) or [VOL --] key
(voltage down) so that the voltage becomes 2.75 ± 0.01 V.
3. Press the Xkey to write the adjusted value.
(The item number changes to 764 when Xkey is pressed)
Adjustment and Connection Location:MAIN board
(see page 20)
Adjustment method of Vl PWM Duty
(item number: 764)
1. Press the [ENTER] key and change the LCD display.
2. Connect a digital voltmeter to the TP901 (VL) on the MAIN
board, and adjust [VOL +] key (voltage up) or [VOL --] key
(voltage down) so that the voltage becomes 2.30 ± 0.01 V.
3. When press the Xkey to write the adjusted value, LCD dis-
plays as follows and power supply manual adjustment has com-
pleted.
Adjustment and Connection Location:MAIN board
5-6. Temperature Correction
Adjustment Method of temperature correction
1. Select the manual mode of test mode, and set the mode num-
ber 014 (see page 12).
2. Measure the ambient temperature.
digital
voltmeter
MAIN board
TP902(VC)
TP910(GND)
This set LCD display
7 6 4 V1 PWM
This set LCD display
7 6 4
AD
: Adjusted value
digital
voltmeter
MAIN board
TP901(VL)
TP910(GND)
This set LCD display
0 0 0 ADJ OK
This set LCD display
0 1 4 SetTmp
digital voltmete
r
MAIN board
TP(+)
TP(–)
laser
power meter
Optical pick-up
objective lens
This set LCD display
0 1 1 ###S
###: Address
: Adjusted value
20
MZ-R501/R501PC
8. Press the Nkey, and set the laser CD read adjustment
mode (item number 012).
9. Press the [ENTER] key and set the address & adjusted value
display (see page 13).
10. Check that the laser power meter reading is 0.97 ± 0.10 mW.
11. Check that the voltage both ends (TP (+) and TP ()) of resis-
tor R501 at this time is below 44 mV.
12. Press the Nkey, and set the laser MO write adjustment mode
(item number 013).
13. Press the [ENTER] key and set the address & adjusted value
display (See page 13).
14. Check that the laser power meter reading is 4.95 ± 0.50 mW.
15. Check that the voltage both ends (TP (+) and TP ()) of resis-
tor R501 at this time is below 80 mV.
16. Press the xkey to quit the manual mode, and activate the
test mode (display check mode).
Checking and Connection Location: MAIN board
5-8. Overall Adjustment Mode
Configuration of overall adjustment
Note: Adjust the CD first, when performing adjustment.
Adjustment/checking and Connection Location:
This set LCD display
0 1 2 HrefPw
This set LCD display
0 1 2 ###S
###: Address
: Adjusted value
This set LCD display
0 1 3 WritPw
This set LCD display
0 1 3 ###S
###: Address
: Adjusted value
TP910(GND)
TP902(VC)
TP()
TP(+)
TP901
(VL)
R501
MAIN BOARD (SIDE B)
. key
> key
N key
N key
Protect switch
ON
Protect switch
OFF
x key
x key
x key
x key
x key
x key
NG item exists
or x key
Overall adjustment mode
(Title display)
CD overall
adjusting
MO overall
adjusting
CD overall
adjustment
OK
MO overall
adjustment
OK
CD overall
adjustment
NG
NG item exists
or x key
MO overall
adjustment
NG
Electrical
offset
adjustment
Power supply
adjustment
auto item feed
ENTER key
END SEARCH key
Test mode (display check mode)
All item
OK
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Sony MZ-R501 User manual

Category
Minidisc players
Type
User manual
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