Sony MZ-R55 User manual

– 1 –
MICROFILM
MZ-R55
SERVICE MANUAL
PORTABLE MINIDISC RECORDER
SPECIFICATIONS
E Model
Tourist Model
Model Name Using Similar Mechanism NEW
MD Mechanism Type MT-MZR55-161
Optical Pick-up Type KMS-280A
US and foreign parts licensed Dolby Laboratories Licensing
Corporation.
System
Audio playing system
MiniDisc digital audio system
Laser diode properties
Material: GaAlAs
Wavelength: λ= 780 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 74 minutes (MDW-74, stereo
recording)
Maximum 148 minutes (MDW-74, monaural
recording)
Revolutions
400 rpm to 900 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
Frequency response
20 to 20,000 Hz ±3 dB
Wow and Flutter
Below measurable limit
Inputs
Microphone: stereo mini-jack, 0.22-0.78 mV
Line in: stereo mini-jack, 69-194 mV
Optical (Digital) in: optical (digital) mini-jack
Outputs
Headphones: stereo mini-jack, maximum
output level 5 mW+ 5 mW, load impedance
16 ohm
Line out: stereo mini-jack, 194 mV, load
impedance 10 kilohm
General
Power requirements
Sony AC Power Adaptor (supplied)
connected at the DC IN 3V jack:
220-230 V AC, 50/60 Hz (Hong Kong model)
100-240 V AC, 50/60 Hz (Tourist model)
Nickel metal hydride rechargeable battery NH-14WM (supplied)
Two LR6 (size AA) alkaline batteries (not supplied)
– Continued on next page –
Ver 1.0 1998. 09

– 2 –
Battery operation time
Batteries Recording Playback
NH-14WM nickel Approx. Approx.
metal hydride 2.5 hours 4 hours
rechargeable battery
Two LR6 (SG) Approx. Approx.
Sony alkaline dry batteries 5 hours 10 hours
NH-14WM + Two LR6 (SG) Approx. Approx.
9.5 hours 16 hours
Dimensions
Approx. 78.9 ×18.9 ×84 mm (w/h/d)
(3 1/8×3/4×3 3/8in.)
Mass
Approx. 147 g (5.2 oz) the recorder only
Approx. 190 g (6.7 oz) incl. a recordable MD,
and NH-14WM nickel metal hydride rechargeable battery
Supplied accessories
AC power adaptor AC-MZR55 (1)
Headphones with a remote control
MDR-E838SP and RM-MZR55 (1)
NH-14WM nickel metal hydride rechargeable battery (1)
Dry battery case (1)
Rechargeable battery carrying case (1)
Carrying pouch (1)
AC plug adaptor (1) (Tourist model only)
Design and specifications are subject to change without notice.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINEWITH
MARK !ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS
LIST ARE CRITICALTO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
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.
Precautions for Laser Diode Emission Check
When checking the emission of the laser diode during adjust-
ments, never view directly downwards as this may lead to
blindness.
Precautions for Using Optical Pick-up (KMS-280A)
As the laser diode inside the optical pick-up damages by static
electricity easily, solder the laser tap of the Optical pick-up
flexible board when handling. Also take the necessary measures
to prevent damages by static electricity. Handle the Optical pick-
up flexible board with care as it breaks easily.
Laser tap
Optical Pick-up flexible board

– 3 –
upper panel ass
y
MAIN board
S801
tape
1. GENERAL....................................................................... 4
2. SELF-DIAGNOSTIC
2-1. General ..................................................................... 5
2-2. Test Mode Setting ..................................................... 5
2-3. Operation in Test Mode Setting ................................ 5
2-4. Releasing the Test Mode........................................... 5
2-5. Self-Diagnostic Mode............................................... 5
2-6. Clearing the Error Indication Code
and Total Recording Time ........................................ 6
3. DISASSEMBLY
3-1. Bottom Panel Assy ................................................... 7
3-2. Connector ................................................................. 7
3-3. Upper Panel BlockAssy ........................................... 8
3-4. LCD Block Assy ....................................................... 8
3-5. Ornamental Belt Block Assy .................................... 9
3-6. Main Board ............................................................... 9
3-7. Chassis (Main) Assy ............................................... 10
3-8. Over Head BlockAssy ........................................... 10
3-9. Holder Assy ............................................................ 11
3-10. OP Block Assy........................................................ 11
TABLE OF CONTENTS
4. TEST MODE
4-1. General ................................................................... 12
4-2. Test Mode Setting................................................... 12
4-3. Test Mode Structure ............................................... 12
4-4. Manual Mode ......................................................... 12
4-5. Overall Adjustment Mode ...................................... 15
4-6. Hybrid Mode, Key Check Mode ............................ 16
5. ELECTRICAL ADJUSTMENTS........................... 17
6. DIAGRAMS
6-1. IC Pin Descriptions ................................................ 21
6-2. Block Diagram – Servo Section – .......................... 25
6-3. Block Diagram – Audio Section –.......................... 27
6-4. Block Diagram – System Control Section –........... 29
6-5. Printed Wiring Board (-11)..................................... 31
6-6. Printed Wiring Board (-12)..................................... 34
6-7. Schematic Diagram – Main Section (1/3) – ........... 37
6-8. Schematic Diagram – Main Section (2/3) – ........... 40
6-9. Schematic Diagram – Main Section (3/3) – ........... 43
7. EXPLODED VIEWS
7-1. Panel Section .......................................................... 51
7-2. Chassis Section ....................................................... 52
7-3. Mechanism Deck Section ....................................... 53
8. ELECTRICAL PARTS LIST................................... 54
SERVICING NOTE
1) 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
fastening the hook of the DOOR OPEN switch (S801) with tape.
2) This set is designed to perform automatic adjustment for each
adjustment and write its value to EEPROM. Therefore, when
EEPROM (IC801) has been replaced in service, be sure to per-
form automatic adjustment and write resultant values to the new
EEPROM.
Refer to page 12 for details.

– 4 –
SECTION 1
GENERAL This section is extracted from
instruction manual.

– 5 –
SECTION 2
SELF-DIAGNOSTIC
2-1. GENERAL
This set uses the self-diagnostic system in which if an error occurs
in playback/recording mode, the error is detected by the model
control and power control blocks of the microprocessor and infor-
mation 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.
2-2.TEST MODE SETTING
There are two different methods to set the test mode:
1Short BP801 (TEST) on the main board with a solder bridge
(connect pin @§ of IC801 to the ground). Then, turn on the
power.
IC802
IC503
R818
C309
IC509 BP801
– main board (side B) –
2In the normal mode, use the keys on the unit to perform the
following operations:
Press and hold down (and press the keys below in this turn:
+n+n=n=n+n=n+n
=nPnP
2-3. OPERATION INTEST MODE SETTING
When the test mode is set, the LCD shows repeated cycles of the
following display:
1) Unit LCD
188:88
ı
Ver ‚‚.8‚
All ON
All OFF
Microprocessor
version
display
2) Remote controller LCD
888 ı
Ver ‚.8‚
All ON
All OFF
Microprocessor
version
display
• Holding down Pallows the current display to be maintained
while it being depressed.
2-4. RELEASINGTHETEST MODE
For test mode set with the method 1:
Turn off the power and open the solder bridge on BP801 on the
main board.
For test mode set with the method 2:
Turn off the power.
2-5. SELF-DIAGNOSTIC MODE
1. Go into the test mode.
2. With the unit LCD indicators all flashing, press DISPLAY key
to go into the self-diagnostic mode.
1st ‚ ‚‚
History code
Error indication code
3. Then, each time )key is pressed, the reference information
display changes as given below.
1st ‚ XX
1st 1 ‚‚
1st 2 ‚‚
1st ‚ XX
N ‚ XX
N 1 ‚‚
N 2 ‚‚
N-1 ‚ XX
N-1 1 ‚‚
N-1 2 ‚‚
N-2 ‚ XX
N-2 1 ‚‚
N-2 2 ‚‚
REC XXXX
(return)
• Press =key to go back to the previous display.

– 6 –
• Description of History Codes
History code number Description
1st 0 The first error
1st 1
1st 2 00 indicated
N 0 The last error
N1
N2 00 indicated
N-1 0 One error before the last.
N-1 1
N-1 2 00 indicated
N-2 0 Two errors before the last.
N-2 1
N-2 2 00 indicated
REC Total recording time *1)
*1) Total recording time
Total recording time is recorded in minutes as an index for load to
the OP. It is recorded in hexadecimal format and up to 65,535 min.
(about 886 discs of 74-minute disc) can be counted. It returns to
“0000h” when recorder goes beyond this limit.
Example :REC 000A nApprox. 10 min.
REC 00A0 nApprox. 160 min.
REC 0A00 nApprox. 2560 min.
• Description of Error Indication Codes
Problem Indication code Meaning of code Description
No error 00
Abnormal stop
during recording
Abnormal disc RPM.
01 Servo error Focus out of alignment.
Attempt to access an abnormal address.
02 ADIP read error Unable to read the ADIP address.
03 Shock detected during write Jumped by 1.5 tracks or more due to shock during write.
Shock detected during
04 laser down Shock detected when laser was moving down.
Abnormal stop
during playback
11 No focus applied Focus could not be applied.
12 CRC error Unable to read the address.
15 FG error Abnormal rotation of disc.
Abnormal stop of
recording/playback
caused by power
system
21 Lower voltage due to overload Power voltage reduced due to overload.
22 Momentary interruption Momentary interruption detected.
23 Lower power voltage in motor Power voltage for motor continuously reduced to less than
system 1V.
24 Low power voltage in DSP
2-6. CLEARINGTHE ERROR INDICATION CODE
ANDTOTAL RECORDINGTIME
After repair, reset the error indication code.
Reset the total recording time when you have replaced the OP.
1. Go into the self-diagnostic mode. (See page 5.)
2. To reset the error indication code, slide REC ckey when
the code is displayed.
(All data including 1st, N , N-1 and N-2 are reset.)
3. To reset the total recording time, slide REC ckey when the
time is displayed.

– 7 –
Note : This set can be disassemble according to the following sequence.
SECTION 3
DISASSEMBLY
3-1. BOTTOM PANEL ASSY
Note) When installing, fit the each positions knobs with switches.
1 precision pan screws (M1.4)
2 precision pan screws (M1.4)
3 precision pan screw (M1.4)
4 bottom panel assy
switches
knobs
3-2. CONNECTOR
1 CN601
2 CN801
3 CN502
Bottom
Panel
assy
Connector
Main
Board
Upper Panel
Block assy LCD Block assy
Ornametal Belt
Block assy
Main Board
Chassis (Main)
assy Over Head Block assy Holder
assy
OP Block
assy
Note : Follow the disassembly procedure in the numerical order given.

– 8 –
3-3. UPPER PANEL BLOCK ASSY
3-4. LCD BLOCK ASSY
2 precision pan screw (M1.4)
3 precision pan screws (M1.4)
4 step screw (click arm)
0 click arm assy
7 upper panel block assy
9
6
5
1
8
1 precision pan screw (M1.4)
2 tapping screws (1.7)
3 claws
4 LCD block assy

– 9 –
3-5. ORNAMENTAL BELT BLOCK ASSY
3-6. MAIN BOARD
5 ornamental belt block assy
6 button (OPEN)
1
2
3
4
1 precision pan screw (M1.4)
2 step screw (HP)
3 toothed lock screw (M1.4)
4 toothed lock screws (M1.4)
7 CN501
8 MAIN board
6
5

– 10 –
3-7. CHASSIS (MAIN) ASSY
3-8. OVER HEAD BLOCK ASSY
1 step screw (MD)
2 step screw (MD)
4 chassis (MAIN) assy
3
1 screws
2 over head block assy

– 11 –
3-9. HOLDER ASSY
3-10. OP BLOCK ASSY
1 M1.4x3.
0
2 OP block assy
1 claw
4 holder assy
2
3

– 12 –
SECTION 4
TEST MODE
4-1. GENERAL
Thissetpr ovidestheOveralladjustmentmode(Assymode)that
allo wsCDandMOdisktobeautomaticall yadjustedwheninthe
testmode . InthisAssymode ,thesystemdiscriminatesbetween
CDandMOdiskandthenautomaticallyperformadjustmentsfor
theminsequence . Ifafaultisf ound, thesystemdispla ysitsloca-
tion. Also, theSer vomodeallo wseac hindividualadjustmenttobe
automaticallyadjusted.
4-2.TEST MODE SETTING
Seepage5.
4-3.TEST MODE STRUCTURE
Testmode
4-4. MANUAL MODE
(1) Servo Mode
• How toTransfer in the Servo Mode:
Mode No. Test Description Check Write
000 Servo mode
010 Offset correction value indication
011 VC offset correction
012 Focus bias correction
013 FE offset correction
014 ABCD offset correction
015 All servo ON
016 Temperature indication
020 Laser power adjustment
021 Laser CD/MO read adjustment ®(08)
022 Laser MO write adjustment ®(4C)
023 Sled normal ®(45)
024 Sled intermittent ®(65)
025 Sled access ®(30)
030 MO test adjustment
031 MO focus search adjustment
032 MO read FE balance adjustment ®(0F)
033 MO read ABCD level ®(07)
034 MO write FE balance adjustment ®(10)
035 MO write ABCD level ®(18)
036 Laser MO read adjustment ®(08)
037 MO focus gain ®(30)
038 MO tracking gain ®(30)
039 MO focus bias ®®(06)
040 Low reflection CD test adjustment
041 Low reflection CD focus search adjustment
042 Low reflection CD FE balance adjustment ®(10)
043 Low reflection CDABCD level ®(06)
044 Laser low reflection CD read ®(08)
045 Low reflection CD focus gain ®(30)
046 Low reflection CD tracking gain ®(30)
Mode No. Test Description Check Write
047 Low reflection CD focus bias ®®(00)
050 CD test adjustment
051 CD focus search adjustment
052 CD FE balance adjustment ®(10)
053 CD ABCD level adjustment ®(15)
054 Laser CD read ®(08)
055 CD focus gain ®(30)
056 CD tracking gain ®(30)
057 CD focus bias ®®(00)
060 Recording test
061 32 cluster full recording
062 Recording shock
063 32 cluster full playback
Check : Modetodispla yerr orrateandc luster .
Write : Modetopermitadjustment(Defaultv aluegiveninparen
theses).
1. Gointothetestmode.
2. Press +or VOLUME + ke y toset theser vomode .
Unit LCD display
3. Presstheke ysbelo wtoc hang ethemodeNo.
(: Increasestheoneplace.
p: Setstheoneplaceto0.
Thiske ybringsthetenplaceto0iftheoneplaceis
0.
VOLUME + : Increasesthetenplaceby10iftheoneplaceis0.
Increasestheadjustmentv alueiftheoneplace
isnon-zero.
VOLUME – : Decreasesthetenplaceby10iftheoneplaceis0.
Decreasestheadjustmentv alueiftheoneplaceis
non-zero.
• How to Adjust in Servo Mode:
1. Whentheser vomodeissettotheappr opriatemodef oreac h
adjustment, thelo werto wdigitsofthemodeNo. andthev alue
storedinEEPR OMaredispla yedandflashing.
SERVO
XX XX
Adjustment value
(the data can be changed/
written when flashing.)
Mode No.
(The lower two digits are indicated.
Three digits are indicated on the
remote controller LCD.)
SERVO
XX XX
Adjustment value (flashing)
Mode No. (lower two digits)
Manual Mode
Servo Mode
Audio Mode
Mechanism Mode
Power Mode
or VOLUME key
VOLUME key
Overall Adjustment Mode
or VOLUME key
Hybrid Mode (ALL Mode)
+
–
+
=
+
EDIT/ENTER key
MODE key
Key Check Mode
(Assy Mode)

– 13 –
2. Toperf ormautomaticadjustmentf oranadjustmentitemwith
themoden umber030to047, press Pke y.
IftheresultofadjustmentisOK, theadjustmentv aluec hang es
fromflashingtosteadyonanditisautomaticallywrittento
EEPR OM.
AUTO ADJ
32 OF
Adjustment value
(flashing to steady on)
3. Toperf ormman ualadjustment, chang etheadjustmentv aluewith
VOLUME + or – ke y, and press Pke y to write it to
EEPR OM.
Note) Normall y,automaticadjustmentshouldbeperf ormed. Do
note xecuteman ualadjustment.
• System Gain Mode
1. Thismodeallo wsthesystemgaintobefreel yadjusted. Press
DISPLAY keytoenterthismode .
SYS_GAIN
32 OF
Adjustment value (flashing)
2. Increaseordecreasetheadjustmentv aluewith VOLUME + or
– ke y.
3. Press DISPLA Y or pke ytoreturntothenormalmode .
4. Fortheerr orratedispla yenab led:
(2) Audio Mode
• How toTransfer in the Audio Mode
Mode No. Test Description Write
Change
Description
100 Audio mode
110 Audio playback
111 L/R=1 kHz 0 dB Playback VOL HP output
112 L=1 kHz 0 dB Playback VOL HP output
113 R=1 kHz 0 dB Playback VOL HP output
114 L/R – ∞dB Playback VOL HP output
120 Audio recording test
121 LINE manual recording Recording VOL HP output
*1) MIC manual recording
122 DEMP LINE manual recording
Recording VOL HP output
*1) DEMP MIC manual recording
123 LINE automatic recording
*1) OPT automatic recording HP VOL HP output
MIC automatic recording
124 DEMP LINE automatic recording
*1) DEMP OPT automatic recording HP VOL HP output
DEMP MIC automatic recording
130 DIGITAL AGC ADJ1
131 MIC UP SR ®(30)
132 MIC DOWN SR ®(FA)
133 MIC THD0 ®(D0)
134 MIC GAIN ®(00)
135 MIC ATTACK ®(A0)
136 MIC RECOVER ®(F8)
137 MIC THD2 ®(F0)
138 MIC GAIN2 ®(D0)
139 MIC RTIME ®(01)
140 DIGITAL AGC ADJ2
141 LINE UP SR ®(17)
142 LINE DOWN SR ®(FF)
143 LINE THD0 ®(D0)
144 LINE GAIN ®(0C)
145 LINE ATTACK ®(33)
146 LINE RECOVER ®(F8)
147 LINE THD2 ®(E4)
148 LINE GAIN2 ®(5F)
149 LINE RTIME ®(04)
150 DIGITAL AGC ADJ3
151 MAN UP SR ®(C0)
152 MAN DOWN SR ®(40)
153 AUTO THD3 ®(51)
154 AUTO LMT UP SR ®(FF)
155 AUTO LMT DOWN SR ®(E0)
156 MAN THD3 ®(51)
157 MANU LMT UP SR ®(FF)
158 MANU LMT DOWN SR ®(A0)
159 THD1 ®(1A)
*1) The port is detected and the input is automatically selected.
Contentschanged : Contentstobec hang edwhen VOLUME
+ or – ke yispressed.
Write :Modetopermitadjustment
(Defaultv aluegiveninparentheses)
1. Gointothetestmode.
2. Press +ke y or VOLUME + ke yand VOLUME + ke y in
thisturntosettheaudiomode.
000 4F FF
39 OA
BLOCK error rate
Mode No. (lower two digits)
Cluster value
AT error rate
Adjustment value (flashing)
Normal Mode
System gain Mode
Error rate display Press DISPLAY key
Note) Innormalser vice ,donotadjustthesystemgainmode .

– 14 –
Unit LCD display
AUDIO
XX XX
Adjustment value
(the data can be changed/
written when flashing.)
Mode No.
(The lower two digits are indicated.
Three digits are indicated on the
remote controller LCD.
)
3. Presstheke ysbelo wtoc hang ethemoden umber .
(: Increasestheoneplace.
p: Setstheoneplaceto0.
Thiske ybringstheten placeto0iftheoneplace
is0.
VOLUME + : Increasesthetenplaceby10iftheoneplaceis0.
Increasestheadjustmentv alueiftheoneplaceis
non-zero.
VOLUME – : Decreasesthetenplaceby10iftheoneplaceis0.
Decreasestheadjustmentv alueiftheoneplaceis
non-zero.
• How to Adjust in the Audio Mode
1. Whentheaudiomodeissettotheappropriatemodeforeach
adjustment, thelo werto wdigitsofthemodeNo. andthev alue
storedinEEPR OMaredispla yedandflashing.
2. Chang etheadjustmentv aluewith VOLUME + or – ke yand
press Pke ytowritethene wvaluetoEEPR OM.
• How to Check in the Audio Mode
Theaudiomodeallo wsthec hec ksbelo wtobeperf ormed:
1. Forthemoden umber sof100and110to114, pressing Pke y
willactiv ateabeep. (Nobeepsoundswhen cHOLD s witc h
isputon.)
2. Forthemoden umber sof121to124, pressing DIGIT ALMEGA
BASS ke ywilldispla ytheDBBmodef ortheadjustmentv alue .
1 :Mode1
2 :Mode2
13 :OFF
(ThiswillnotbeacceptedwhentheLINEOUTjackisplugged.
Thedispla ywillbe13: OFFwhenLINEOUTjac kisplug ged
inModes1and2.)
3. Forthemoden umber sof120to124, REC LEDgoeson.
(TheLEDdoesnotgoonwhen SYNCHR OREC s witc hisput
on.)
(3) Mechanism Mode
• How toTransfer the Mode in the Mechanism Mode:
Mode No. Test Description Operation
200 FUNCTION Stepper control
210 MECHA test Initial position return
211 HEAD adjustment Operation variation changing (19)
212 REC position Recording head descent
220 CLOCK Clock
221 CLOCK check Clock check/initialization
( ) : Default value
1. Gointothetestmode.
2. Press +or VOLUME + and VOLUME + and VOLUME
+ inthisturntosetthemechanismmode.
Unit LCD display
MECHA
XX XX
Adjustment value
Mode No.
(Lower two di
g
its are displayed.)
3. Presstheke ysbelo wtoc hang ethemodeNo.
(: Increasestheoneplace.
p: Setstheoneplaceto0.
Thiske ybringsthetenplaceto0iftheoneplaceis
0.
VOLUME + : Increasesthetenplaceby10iftheoneplaceis0.
Increasestheadjustmentv alueiftheoneplace
isnon-zero.
VOLUME – : Decreasesthetenplaceby10iftheoneplaceis0.
Decreasestheadjustmentv alueiftheoneplaceis
non-zero.
• How to Check in the Mechanism Mode
Themec hanismmodeallo wsthec hec ksbelo wtobeperf ormed:
1. Forthemoden umber sof200, 210to212, 220and221, pressing
=ke ywillmo vetheopticalpic kuptotheinnerradius.
Pressing +ke ywillmo vethepic kuptotheouterradius.
2. Forthemoden umber sof211and212, pressing Pke ywill
star ta ging. Pressing pke ywillstopa ging.
•ModeNo.211... Sled aging with stepperatplayback position.
•ModeNo.212... Sled aging with stepperatrecording position.
3. Withthemoden umber210selected, pressing Pke ywillstar t
agingwithsteeperatbetweenhomeandrecordingpositions.
pke ywillstop a ging.

– 15 –
• Clock Operation Check
1. ForthemodeNo. of221, operationc hec kisperf ormed.
ItisdeterminedasOKifat11years,11months,11days,11
hour s, 11min utesand11secondsornotthedefaultv alue .
2. ForthemodeNo. of221, pressing Pke ywillc leartheresume
datastoredinEEPR OMandinitializ ethec loc kdata.
Note) Thec loc kshouldbesetwhentheo veralladjustmentmode
iscompletedasOK. Thewritedataistobeat11y ear s,
November11da ys, 11hour s, 11min utesand11seconds.
(4) Power Mode
Mode No. Test Description Indication value Remark
300 POWER test
310 POWER SUPPLY
311 DC IN +B voltage value
312 DC IN + Ni-Cd +B voltage value
313 Ni or AM3 +B voltage value
314 AM3 +B voltage value
320 CHG TEST
321 Charging start
1. Gointothetestmode.
2. Press +ke y or VOLUME + and VOLUME + and VOL-
UME + and VOLUME + inthisturntosetthepo wermode .
POWER
XX XX
Adjustment value
Mode No.
(Lower two digits are displayed.)
3. Presstheke ysbelo wtoc hang ethemodeNo.
(: Increasestheoneplace.
p: Setstheoneplaceto0.
Thiske ybringsthetenplaceto0iftheoneplaceis
0.
VOLUME + : Increasesthetenplaceby10iftheoneplaceis0.
Increasestheadjustmentv alueiftheoneplace
isnon-zero.
VOLUME – : Decreasesthetenplaceby10iftheoneplaceis0.
Decreasestheadjustmentv alueiftheoneplaceis
non-zero.
Note) Withthemoden umber310selected, pressing (ke ywill
transfertothemodenumber(311to314)forthecurrently
operatingpo wer .
Withthemoden umber300selected, pressing Pke ywill
setthesleepmode .Pressing pke ywillreleaseit.
• How to Check in the Power Mode
1. Forthemoden umber sof311to314, thev olta geofthecurrentl y
operatingpo werisdispla yed.
4-5.OVERALL ADJUSTMENT MODE (ASSY MODE)
• How to Adjust in Assy Mode
1. Gointothetestmode.
2. Press =or VOLUME – ke y.
Assy Mode
XX
40
3. Inser tthetestCD(TD YS-1)orana vailab leSONYCD .
4. Press (ke y. ThesystemdiscriminatesbetweenCDandMO
andperformsautomaticadjustmentforCD.
CD RUN
51
Mode No. under ad
j
ustmen
t
• CD Automatic Adjustment
Mode No. Adjustment Description
052 CD FE balance adjustment
053 CD ABCD level adjustment
055 CD focus gain
056 CD tracking gain
057 CD focus bias
CDmode OK
00
5. IftheresultofautomaticadjustmentisOK, thef ollo wingdis-
playappears:
6. IftheresultofautomaticadjustmentisNG, thef ollo wingdis-
playappears:
CDmode NG
55 7F
Result of adjustment
NG mode No. (lower two digits)

– 16 –
* Forthemoden umber sof039and057, ifthef ocusbiasv alueis
NG,thef ollo wingdispla yisrepeated:
CDmode NG
55 30
Focus bias value
Mode No.
CDmode NG
77 01
Error code (01 to 04)
Meaning of focus bias
While Pke yisbeingdepressed
* Forthemoden umber sof039and061, iftheAterr orrateisNG,
thef ollo wingdispla yisrepeated:
CDmode NG
39 03
At error value
Mode No. (lower two digits)
7. IfNG,settheser vomode . Performautomaticadjustmentf or
theitemsnotaccepted(seetheser vomode).
8. InsertaMOdisk.
9. Press (ke y. ThesystemdiscriminatesbetweenCDandMO
andperformsautomaticadjustmentfortheMOdisk.
MO RUN
61
Mode No. (lower two digits)
• MO Automatic Adjustment
Mode No. Adjustment Description
032 MO read FE balance adjustment
033 MO read ABCD level
034 MO write FE balance adjustment
035 MO write ABCD level
037 MO focus gain
038 MO tracking gain
061 32 cluster full recording
062 Recording shock
063 32 cluster full playback
039 MO focus bias
042 Low refrection CD FE balance adjustment
043 Low refrection CD ABCD level
044 Laser low reflection CD read
046 Low refrection CD tracking gain
10. IftheresultofautomaticadjustmentisOK, thef ollo wingdis-
playappears:
11. IftheresultofautomaticadjustmentisNG, thef ollo wingdis-
playappears:
12. IfNG,settheser vomode . Performautomaticadjustmentf or
theitemsnotaccepted(seetheser vomode).
4-6. HYBRID MODE, KEY CHECK MODE
Thesemodesarenotusedinnormalservice.
MOmode OK
00
MOmode NG
82 00
Result of adjustment
NG mode No. (low two digits)

– 17 –
SECTION 5
ELECTRICAL ADJUSTMENTS
PRECAUTIONS FOR ADJUSTMENT
1) Performalladjustmentsintheor dergiveninthetestmode .
Afteradjusting, exitthetestmode .
2) Usethef ollo wingtoolsandmeasuringinstruments.
• TestCD TDYS-1
(Par tNo. : 4-963-646-01)
• RecordedMOdisk PTDM-1
(Par tNo. : J-2501-054-A)
• Laserpo wermeter LPM-8001
(Par tNo. : J-2501-046-A)
• Oscilloscope(Frequenc ybandabo ve40MHz. Performthe
calibrationofpr obefir stbef oremeasuring.)
• Digitalv oltmeter
3)Unlessspecifiedothe wise ,suppl yDC3Vfr omtheDCIN3V
jack.
4) Swtich,knobpositions
HOLDswitch ............. OFF
AVLSs witc h .............. NORM
LASER POWER CHECK
Connection :
Adjustment Method :
1. Settheser vomodeofthetestmode(Mode: 000).
2. Pressthe (ke y,andsetthelaserpo weradjustmentmode
(Mode: 020)usingthe VOLUME + or – ke y.
3. Pressthe =keyandmo vetheopticalpic k-uptotheinner
mostcircumference.
4. Opentheco verandsetthelaserpo wermeterontheobjective
lensoftheopticalpick-up.
5. Pressthe (ke y,andsetthelaserCD/MOreadadjustment
mode (Mode:021).
6. Chec kthatthelaserpo wermeterreadingis0.85 ±0.085mW .
7. Chec kthatthev olta gebetweenAP5117(VCC)andAP574
(LDI0)atthistimeisbelo w44mV .
8. Pressthe (ke y,andsetthelaserMOwriteadjustment
mode(Mode:022).
9. Chec kthatthelaserpo wermeterreadingis6.8 ±0.68mW .
10. Pressthe Pke ytofinaliz etheadjustmentdata.
11. Chec kthatthev olta gebetweenAP5117(VCC)andAP574
(LDI0) atthistimeisbelo w80mV.
12. Pressthe pke y.
13. Exitthetestmode.
AdjustmentLocation:Seepage19.
MOTRAVERSE ADJUSTMENT
Connection :
Adjustment Method :
1. Settheser vomodeofthetestmode(Mode: 000).
2. Pressthe (ke y,andsettheMOtestadjustmentmode(Mode
: 030)using the VOLUME + or – ke y.
3. Press the =or +ke y andmo ve theoptical pic k-upto
thecentercircumference.
4. Inser tan yMOdiska vailab leonthemarket.
5. Whenthe (ke yispressed, theMOreadFEbalanceadjust-
mentmode(Mode:032)willbesetafterMOfocussearch
adjustmentmode(Mode:031).
6. Pressthe Pkeytoperf ormautomaticadjustment, andc hec k
that the traverse waveform is symmetrical at the top and bottom.
7. Slidethe REC ke yandsettheMOwriteFEbalanceadjust
mentmode(Mode:034).
8. Pressthe Pkeytoperf ormautomaticadjustment, andc hec k
that the traverse waveform is symmetrical at the top and bottom.
9. Chec kthatthetra ver sele velatthistimeisabo ve1.0 Vp-p.
10. Pressthe pke y.
11. Exitthetestmode.
Note) Usingarecordeddiskinthisadjustmentwillerasethedata.
AdjustmentLocation:Seepage19.
digital voltmete
r
MAIN board
AP5117 (VCC)
AP574 (LDI0)
laser
power meter
Optical pick-up
objective lens
oscilloscop
e
MAIN board
TP5980 (TE)
AP5430 (VC)
A
B
C
Specification : A = B, C 1.0 Vp-p
0 V
(Traverse waveform)
>
=

– 18 –
LOW REFLECTION CDTRAVERSE ADJUSTMENT
Connection :
Adjustment Method :
1. Settheser vomodeofthetestmode(Mode: 000).
2. Pressthe (ke y,andsetthelo wreflectionCDtestadjustment
mode(Mode: 040)usingthe VOLUME + or – ke y.
3. Inser tan yMOdiska vailab leonthemarket.
4. Whenthe (ke yispressed, thelo wreflectionCDFEbalance
adjustmentmode(Mode: 042)willbesetafterlo wreflection
CDfocussearchadjustmentmode(Mode:041).
5. Pressthe Pke ytoperf ormautomaticadjustment, andc hec k
thatthetra ver sewa veformissymmetricalatthetopandbottom.
6. Chec kthatthetra ver sele velatthistimeisabo ve0.9 Vp-p.
7. Pressthe pke y.
8. Exitthetestmode.
AdjustmentLocation:Seepage19.
oscilloscop
e
MAIN board
TP5980 (TE)
AP5430 (VC)
(Traverse waveform)
A
B
C
Specification : A = B, C 0.9 Vp-p
0 V
>
=
CDTRAVERSE ADJUSTMENT
Connection :
Adjustment Method :
1. Settheser vomodeofthetestmode(Mode: 000).
2. Pressthe (ke y,andsettheCDtestadjustmentmode(Mode
:050)usingthe VOLUME + or – ke y.
3. Pressthe =or +ke yandmo vethe opticalpic k-uptothe
centercircumference.
4. Inser tatestCD(TD YS-1).
5. Whenthe (ke yis pressed, the CDFEbalance adjustment
mode(Mode:052)willbesetafterCDfocussearchadjustment
mode(Mode:051).
6. Pressthe Pke ytoperf orm automaticadjustment, andc hec k
thatthetra ver sewa veformissymmetricalatthetopandbottom.
oscilloscop
e
MAIN board
TP5980 (TE)
AP5430 (VC)
7. Chec kthatthetra ver sele velatthistimeisabo ve1.0 Vp-p.
8. Pressthe pke y.
9. Exitthetestmode.
AdjustmentLocation:Seepage19.
(Traverse waveform)
A
B
C
Specification : A = B, C 1.0 Vp-p
0 V
>
=

– 19 –
CD RF LEVEL CHECK
Connection :
Adjustment Method :
1. Settheser vomodeofthetestmode(Mode: 000).
2. Pressthe (ke y,andsettheCDtestadjustmentmode
(Mode: 050)usingthe VOLUME + or – ke y.
3. Press the =or +ke y andmo vetheoptical pic k-upto
thecentercircumference.
4. Inser tatestCD(TD YS-1).
5. Whenthe (ke yispressed, theCDFEbalanceadjustment
mode(Mode:052)willbesetafterCDfocussearchadjust-
mentmode(Mode:051).
6. Whenthe (ke yispressed, theCDABCDle veladjustment
mode(Mode:053)isset.
7. Pressthe Pke ytoperf ormautomaticadjustment, andc hec k
thattheRFle velis1.1 ±0.3 Vp-p.
digital voltmete
r
MAIN board
AP5117 (VCC)
AP574 (LDI0)
oscilloscope
MAIN board
AP5500 (RF)
AP5430 (VC)
8. Chec kthatthev olta gebetweenAP5117(VCC)andAP574
(LDI0)and atthistimeisbelo w40mV.
9. Pressthe pke y.
10. Exitthetestmode.
1.0 ± 0.3 Vp-p
(RF waveform)
AP574
(LDI0)
AP5117
(VCC)
AP5430
(VC)
AP5500
(RF)
BP801
(TEST)
IC501
CN501
IC503
IC509
TP5980
(TE)
– main board (side B) –
– main board (side B) –
Adjustment Location :

– 20 –
2.65V ADJUSTMENT
Connection :
Adjustment Method :
1. Pla ybac kthetestCD(TD YS-1).
2. AdjustR V901sothatthev olta gebetweenAP908(2.65V)and
AP906(GND)isat2.65 ±0.03 Vdc.
Adjustment Location :
digital voltmete
r
MAIN board
AP908 (2.65V)
AP906 (GND)
RV901
2.65V ADJUSTMENT
AP906
(GND)
AP908
(2.65V)
IC802
CN801
– main board (side B) –