Sony MZG-700-DPC Service manual
MZ-G750/G750DPC/R700/R700DPC/R700PC
SERVICE MANUAL
Ver 1.0 2002. 02
Ver 1.0 2001. 01
This service manual contains the
information on the MZ-G750/R700,
MZ-G750DPC/R700DPC and
MZ-R700PC (9-873-045-12,
9-873-126-11 and 9-873-134-11).
US and foreign patents licensed from Dolby
Laboratories Licensing Corporation.
(Photo: MZ-G750)
SPECIFICATIONS
US Model
MZ-G750DPC/R700/R700DPC
Canadian Model
MZ-R700PC
AEP Model
UK Model
MZ-G750/R700/R700PC
E Model
Australian Model
Tourist Model
MZ-G750/R700
Chinese Model
MZ-R700
Model Name Using Similar Mechanism NEW
Mechanism Type MT-MZR700-172
Optical Pick-up Name LCX-4R
MD recorder
Audio playing system
MiniDisc digital audio system
Laser diode properties
Material: GaAlAs MQW
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
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
Microphone: stereo mini-jack, minimum
input level 0.25 mV
Line in: stereo mini-jack, minimum input
level 49 mV
Optical (Digital) in: optical (digital) minijack
Outputs
i: stereo mini-jack, maximum output level
5 mW + 5 mW, load impedance 16 ohm
Radio (MZ-G750/G750DPC)
Frequency range
AM: 530-1,710 kHz (US and
Central and South America models)
531-1,602 kHz (Other models)
FM: 87.5-108.0 MHz
General
Power requirements
Sony AC Power Adaptor (supplied)
connected at the DC IN 3 V jack:
120 V AC, 60 Hz (U.S.A.,Canadian and
Taiwan model)
230 V AC, 50/60 Hz (AEP model)
240 V AC, 50 Hz (Australian model)
220 V AC, 50 Hz (Chinese model)
230-240 V AC, 50 Hz (UK and Hong
Kong model)
220 V AC, 50 Hz (Argentina model)
110/220 V AC, 60 Hz (Korean model)
100-240 V AC, 50/60 Hz (Other models)
Nickel cadmium rechargeable battery
NC-WMAA (supplied)
LR6 (size AA) alkaline battery (not
supplied)
– Continued on next page –
FM/AM PORTABLE MINIDISC RECORDER
MZ-G750/G750DPC
9-873-629-01
2002B0400-1
© 2002.02
PORTABLE MINIDISC RECORDER
MZ-R700/R700DPC/R700PC
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
1
MZ-G750/G750DPC/R700/R700DPC/R700PC
Battery operation time
Battery life1) (MZ-G750/G750DPC)
When recording
2)
(Unit: approx.hours) (EIAJ3))
Batteries Stereo LP2 LP4
NC-WMAA Nickel Cadmium 4 6 7.5
rechargeable battery
LR6 (SG) Sony alkaline dry 9
5)
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)
Measured in accordance with the EIAJ (Electronic Industries
Association of Japan) standard.
4)
When using a 100% fully charged rechargeable battery.
5)
When using a Sony LR6 (SG) “STAMINA” alkaline dry battery
(produced in Japan).
6)
Recording time may differ according to the alkaline batteries.
4)
6)
6)
13
6)
16
When playing (Unit: approx.hours) (EIAJ1))
Batteries Stereo LP2 LP4
NC-WMAA Nickel Cadmium 11.5 14 16
rechargeable battery
2)
LR6 (SG) Sony alkaline dry 36 42 48
3)
battery
1)
Measured in accordance with the EIAJ (Electronic Industries
Association of Japan) standard.
2)
When using a 100% fully charged rechargeable battery.
3)
When using a Sony LR6 (SG) “STAMINA” alkaline dry battery
(produced in Japan).
When using the radio (EIAJ1))
Batteries Approx. hours
NC-WMAA Nickel Cadmium rechargeable 9.5
2)
battery
LR6 (SG) Sony alkaline dry battery
1)
Measured in accordance with the EIAJ (Electronic Industries
Association of Japan) standard.
2)
When using a 100% fully charged rechargeable battery.
3)
When using a Sony LR6 (SG) “STAMINA” alkaline dry battery
3)
28.5
(produced in Japan).
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 life1) (
MZ-R700/R700DPC/R700PC
)(Unit: approx.hours) (EIAJ2))
Batteries Stereo LP2 LP4
NC-WMAA Nickel Cadmium Recording 4 6 7.5
rechargeable battery
3)
Playback 13 14.5 18
LR6 (SG) Sony alkaline dry Recording 9 13 16
4)
battery
1)
The battery life may be shorter due to operating conditions and the
temperature of the location.
2)
Measured in accordance with the EIAJ (Electronic Industries
Association of Japan) standard.
3)
When using a 100% fully charged rechargeable battery.
4)
When using a Sony LR6 (SG) “STAMINA” alkaline dry battery
Playback 40 46 53
(produced in Japan).
Dimensions
Approx. 81 × 28.1 × 74.4 mm (w/h/d)
(3 1/4 × 1 1/8 × 3 in.) without projections.
Mass
Approx. 118 g (4.2 oz) the recorder only (MZ-G750/G750DPC)
Approx. 116 g (4.1 oz) the recorder only (MZ-R700/R700DPC/R700PC)
Supplied accessories
AC power adaptor (1)
Headphones/earphones with a remote control (1)
Optical cable (1)
NC-WMAA nickel cadmium rechargeable
battery (1)
Rechargeable battery carrying case (1)
Carrying pouch/carrying case with a belt clip (except U.S.A 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.
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.
2
MZ-G750/G750DPC/R700/R700DPC/R700PC
TABLE OF CONTENTS
1. SERVICING NOTE......................................................... 4
2. GENERAL
Looking at the Controls (MZ-G750/G750DPC) ................. 5
Looking at the Controls (MZ-R700/R700DPC/R700PC) .. 6
3. DISASSEMBLY
3-1. Panel Assy, Lower ............................................................... 7
3-2. Panel Assy, Upper ............................................................... 7
3-3. LCD Module ....................................................................... 8
3-4. Main Board ......................................................................... 8
3-5. MD Mechanism Deck ......................................................... 9
3-6. Service Assy, OP ................................................................. 9
3-7. Holder Assy ....................................................................... 10
3-8. Motor Flexible Board ........................................................ 10
3-9. Motor, DC (M602) ............................................................ 11
3-10. “Motor, DC (M601)”, “Motor, DC (M603)” .................... 11
4. TEST MODE
4-1. Outline ............................................................................... 12
4-2. Setting Method of Test Mode ............................................ 12
4-3. Operation in Setting the Test Mode ................................... 12
4-4. Releasing the Test Mode ................................................... 12
4-5. Configuration of Test Mode .............................................. 13
4-6. Manual Mode .................................................................... 13
4-7. Overall Adjustment Mode ................................................. 14
4-8. Self-Diagnosis Result Display Mode ................................ 14
4-9. Result the Error Display Code .......................................... 15
4-10. Sound Skip Check Result Display Mode .......................... 16
4-11. Key Check Mode ............................................................... 16
5. ELECTRICAL ADJUSTMENTS
5-1. Outline ............................................................................... 18
5-2. Precautions for Adjustment ............................................... 18
5-3. Adjustment Sequence ........................................................ 18
5-4. NV Reset ........................................................................... 18
5-5. Power Supply Manual Adjustment.................................... 19
5-6. Temperature Correction ..................................................... 20
5-7. Laser Power Check ........................................................... 20
5-8. Overall Adjustment Mode ................................................. 21
5-9. Resume Clear .................................................................... 23
5-10. Patch Data Rewriting when Nonvolatile
Memory was Replaced ...................................................... 23
6. DIAGRAMS
6-1. IC Pin Function Description ............................................ 29
6-2. Block Diagram – Servo Section – ..................................... 35
6-3. Block Diagram – Audio Section – .................................... 36
6-4. Block Diagram – System Control/Power Section – .......... 37
6-5. Printed Wiring Board – Main Section – ............................ 38
6-6. Schematic Diagram – Main Section (1/3) – ...................... 41
6-7. Schematic Diagram – Main Section (2/3) – ...................... 42
6-8. Schematic Diagram – Main Section (3/3) – ...................... 43
7. EXPLODED VIEWS
7-1. Panel Section ..................................................................... 47
7-2. Chassis Section ................................................................. 48
7-3. MD Mechanism Deck Section .......................................... 49
8. ELECTRICAL PARTS LIST...................................... 50
3
MZ-G750/G750DPC/R700/R700DPC/R700PC
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 electrostatic 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 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.
• 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 (over write 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 (over write head) and the MAIN board with
the lead wires in advance. (See page 8)
FLEXIBLE board
(Over write head)
panel assy, upper
Tape
laser-tap
OPTICAL PICK-UP FLEXIBLE BOARD
S806
MAIN board
• 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 18)
• If the nonvolatile memory was replaced on the set, the modified
program data must be written to the nonvolatile memory. In such
a case, write the modified data that meets the microcomputer
version following the patch data rewriting procedure at the
replacement of nonvolatile memory. (See page 23)
4
(MZ-G750/G750DPC)
SECTION 2
GENERAL
MZ-G750/G750DPC/R700/R700DPC/R700PC
This section is extracted from
instruction manual.
5
MZ-G750/G750DPC/R700/R700DPC/R700PC
(MZ-R700/R700DPC/R700PC)
6
SECTION 3
I
I
DISASSEMBLY
Note : This set can be disassemble according to the following sequence.
MZ-G750/G750DPC/R700/R700DPC/R700PC
Set Panel Assy,Lower
Panel Assy, Upper LCD Module
Main Board MD Mechanism Deck
Service Assy, OP
Holder Assy
Motor Flexible Board
Motor, DC (M602)
Motor, DC (M601), Motor, DC (M603)
Note : Follow the disassembly procedure in the numerical order given.
3-1. PANEL ASSY, LOWER
3
screws (1.4x2.0), MI
4
claw
3-2. PANEL ASSY, UPPER
2
6
Panel Assy , Lower
screws (1.4x2.0), MI
1
5
4
CN801
2
screws (1.4x2.0), M
3
panel assy, upper
1
screws (1.4x2.0), M
7
MZ-G750/G750DPC/R700/R700DPC/R700PC
e
r
3-3. LCD MODULE
2
screws (1.7x2.5)
3
1
screws (1.7x2.5)
4
LCD modul
claws
3-4. MAIN BOARD
5
screws (M1.4x2)
2
arm
qa
Remove
the solder
4
screws (M1.7x3)
7
8
CN501
panel assy, upper
6
Remove the solders
3
screws (M1.4x2)
qd
MAIN board
Remove the solde
9
1
q;
case assy, battery
qs
spring, battery coil
CN502
8
3-5. MD MECHANISM DECK
k
boss
MZ-G750/G750DPC/R700/R700DPC/R700PC
3
MD mechanism dec
boss
2
chassis assy, set
3-6. SERVICE ASSY, OP
3
screw(M1.4),
precision pan
4
spring(s),
pack
1
washer (0.8 - 2.5)
2
gear (SA)
5
screw(M1.4), precision pan
6
spring, thrust detent
8
Pull off the lead screw.
B
1
screws (1.4x1.6), MI
7
Opening the over write head
9
toward the direction
OP Service assy toward
the direction
Note: Do not open the entire assy
forcibly, when opening
the over write head.
B
.
A
, remove the
over write head section
A
9
MZ-G750/G750DPC/R700/R700DPC/R700PC
3-7. HOLDER ASSY
4
1
Open the holder assy.
Remove the holder assy to
direction of the arrow
A
B
.
2
3-8. MOTOR FLEXIBLE BOARD
1
Remove four solders of
DC motor (sled) (M602).
4
adhesive 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.
B
boss
3
2
Remove two solders of
DC motor (over write head up/down) (M603).
3
Remove four solders of
DC motor (spindle) (M601).
10
DC motor (sled)
circular hole
5
motor flexible board
3-9. MOTOR, DC (M602)
5
moter, DC (sled) (M602)
4
two screws(M1.4),
precision pan
MZ-G750/G750DPC/R700/R700DPC/R700PC
3
Remove four solders of
motor flexible board.
1
washer (0.8 - 2.5)
2
gear (SA)
3-10. “MOTOR, DC (M601)”, “MOTOR, DC (M603)”
1
Remove six solders of
motor flexible board.
4
three screws(M1.4),
precision pan
qs
moter, DC (over write head up/down)
(M603)
6
two screws(M1.4),
precision pan
qa
chassis assy, gear
0
screw
(M1.2
9
8
×
1.5)
gear (HA)
gear (HB)
7
washer (0.8 - 2.5)
3
Note: Press-fit the gear (HA) up to the
position of the DC motor (over write
head up/down) (M603) as shown
below.
gear (HA)
2.65 mm
gear chassis assy
DC motor
(over write head up/down)
(M603)
2
washer (0.8 - 2.5)
gear (HC)
5
moter, DC
(spindle)
(M601)
11
MZ-G750/G750DPC/R700/R700DPC/R700PC
SECTION 4
TEST 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 automatically adjusted.
• Operation in the test mode is performed with the set. A key
having no particular description in the text, indicates a set key.
• For the LCD display, the LCD on the set is shown.
4-2. Setting Method of Test Mode
There are two different methods to set the test mode:
1 Short SL801 (TEST) on the MAIN board with a solder bridge
(connect pin 3 of IC801 to the ground). Then, turn on the
power.
MAIN BOARD (SIDE B)
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 display.
This set LCD display
AM
All lit
All off
Microcomputer
version
display
• When the
BASS
Ver 1.200
X key is pressed and hold down, the display at that
SYNCMONOLP24 REC
PM
F
REC DATE REMAIN
time is held so that display can be checked.
88:88
1 SHUFF PGM
00 5
e
R817
C814
C807C808R806
C809
AP817
X801
C821
C815
AP828
Caution: 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 18).
4-4. Releasing the Test Mode
For test mode set with the method 1:
Turn off the power and open the solder bridge on SL801 (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 18) has not been finished
completely, always start in the test mode. (The set cannot
start in normal mode)
FB801
SL801
(TEST)
2 In 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 . t X t X
12
4-5. Configuration of Test Mode
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
Test mode (Display Check Mode)
Press the > or VOL+ key
Manual Mode
Press the x key
Press the . or VOL– key
Overall Adjustment Mode
Press the x key
ENTER key
Self-Diagnosis Result Display Mode
Press the x key
Servo Adjustment
Audio Adjustment
Power Supply Adjustment
OP Alignment Adjustment
Electrical Offset Adjustment
Power Supply Adjustment
Auto item Feed
CD Overall Adjustment/
MO Overall Adjustment
MZ-G750/G750DPC/R700/R700DPC/R700PC
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 12).
2. Press the > or[VOL +] key activates the manual mode where
Press the N or REC key
Sound Skip Check Result Display Mode
Press the x key
Press the T MARK key,or ENTER key for several
seconds(about 3 seconds)
Key Check Mode
The key check quits,or open the upper panel
the LCD display as shown below.
This set LCD display
Manual
00 0
3. During each test, the optical pick-up moves outward or in-
4. Each test item is assigned with a 3-digit item number;
ward while the N or . key is pressed for several seconds respectively.
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).
13
MZ-G750/G750DPC/R700/R700DPC/R700PC
5. The display changes a shown below each time the
[ENTER] key on the set is pressed.
• Address & Adjusted Value Display
This set LCD display
0 113A4S1D
adjustment value
address
• Jitter Value & Adjusted Value Display
This set LCD display
item number
0 110FEJ1D
adjustment value
jitter value
• Block Error Value & Adjusted Value Display
This set LCD display
item number
0 11063B1D
adjustment value
block error value
• ADIP Error Value & Adjusted Value Display
This set LCD display
item number
0 11072A1D
adjustment value
ADIP error value
• Item Title Display
This set LCD display
item number
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 selfdiagnosis 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 12).
2. In the display check mode, press the [ENTER] key activates the
self-diagnosis result display mode where the LCD display as
shown below.
This set LCD display
0 XX1 0010
history
code
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
Total recording time when error occurred
. key is pressed.
error display code
0 XX1
0 11LrefPw 1D
item title
adjustment value
However in the power mode (item number 700’s), only the
item is displayed.
6. Quit the manual mode, and press 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 18).
item number
x key to return to the
0 XXN
0 XXN1
0 XXN2
0 XXR_
XX
If the [ENTER] key on set is pressed with this display, the LCD
switches to the simple display mode.
4. Quit the self-diagnosis result display mode, and press the x key
to return to the test mode (display check mode).
:Error code
:Total recording time
14
MZ-G750/G750DPC/R700/R700DPC/R700PC
• Description of Error Indication Codes
Problem Indication code Meaning of code Simple display Description
No error 00 No error --- No error
01
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
Power supply system error 22 Low battery LBat Momentary interruption detected
Offset system error
11 TOC error TOC Faulty TOC contents
12 Data reading error Data Data could not be read at SYNC
31 Offset error Ofst Offset error
32
33
34
Illegal access target
address was specified
Focus error ABCD
offset error
Tracking error
Offset error
X1 tracking error
Offset error
Adrs Attempt to access an abnormal address
ABCD Focus error ABCD offset error
TE Tracking error Offset error
X1TE X1 tracking error Offset error
• 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 12).
2. Press [ENTER] key activates the self-diagnosis result display
mode.
3. To reset the error display code, press the X key (2 times) when
the code is displayed (except “R_****”).
(All the data on the 1, N, N1, and N2 will be reset)
15
MZ-G750/G750DPC/R700/R700DPC/R700PC
g
)
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 12).
2. Press the N key or [REC] key, and the playing or recording
sound skip result display mode becomes active respectively
where the LCD displays the following.
This set LCD display
0 00P R
Total count of play
system errors(hex.)
3. When the N key 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 [REC]
key is pressed, the display in the record mode appears.
When the [REC] key 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 N key is pressed, the display in the play mode appears.
Total count record
system errors(hex.)
• Cause of Sound Skip Error
Cause of error Description of error
EIB Sound error correction error
Play
Record
4. To quit the sound skip check result display mode and to return
to the test mode (display check mode), press the
Stat Decoder status error
Adrs Address access error
BEmp Buffer is empty
BOvr
Bful
Rtry Retry times over
Buffer is full, and sounds were
dumped
Buffer capacity becomes less,
and forcible writing occurred
x key.
4-11. Key Check Mode
This set can check if the set and remote commander function normally.
• Setting Method of Key Check Mode
1. Setting the test mode (see page 12).
2. Press the [T MARK] key for several seconds (about 3 seconds)
activates the key check mode. (At the last two digits, AD value
of remote commander key line is displayed in hexadecimal)
Playing sound skip
result display
0 00P R
0 00EIB
0 00Stat
0 00Adre
0 00BEmp
0 00######
P R
:Total play/record errors(hex.)
:Counter of sound skip check each item(hex.)
:6-di
######
it address where sound was skipped last(hex.
Recording sound skip
result display
0 00P R
0 00BOvr
0 00Bful
0 00Rtry
0 00######
This set LCD display
0 00
: AD value of the remote commander Key
(hexadecimal OO to FF)
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 commander LCD switches to its name display)
Example1: When > key on the set is pressed:
This set LCD display
0 00FF
: AD value of the remote commander Key
(hexadecimal OO to FF)
Example2: When N > key on the remote commander is
pressed:
This set LCD display
0 00rPLAY
16
: AD value of the remote commander Key
(hexadecimal OO to FF)
4. When all the keys on the set and on the remote commander are
considered as OK, the following displays are shown for 4 seconds.
Example1: When the keys on the set are considered as OK:
This set LCD display
0 00SET OK
: AD value of the remote commander Key
(hexadecimal OO to FF)
Example2: When the keys on the remote commander are con-
sidered as OK:
This set LCD display
0 00RMC OK
: AD value of the remote commander Key
(hexadecimal OO to FF)
MZ-G750/G750DPC/R700/R700DPC/R700PC
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.
17
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