JVC XMP-55, XMPJ-1 Service manual

SERVICE MANUAL

PORTABLE MINIDISC PLAYER

XM-P55
XM-PJ1

XM-P55
XM-PJ1

Contents

B
E
EE
EN
J
UB
US
UT
UX
UY

5

5

P

-

M

X

OPEN

XM-P55

Area Suffix

(XM-P55 )

U.K. (BU,SL)
Continental Europe (BU,SL)
Russian Federation (BU,SL)
Northern Europe (BU,SL)
U.S.A. (SL)
Hong kong (BU,GN,SL)
Singapore (BU,SL)
Taiwan (SL)
Saudi Arabia (SL)
Argentina (SL)

B
E
EE
EN
J
UB
US
UT
UX
UY

XM-PJ1

Area Suffix

(XM-PJ1 )

U.K. (BU)
Continental Europe (BU)
Russian Federation (BU)
Northern Europe (BU)
U.S.A. (BU)
Hong kong (BU,GD)
Singapore (BU)
Taiwan (BU)
Saudi Arabia (BU)
Argentina (BU)

Safety Precautions
Instructions (For XM-P55&PJ1)
Description of Major ICs
Removal of Main Parts
Maintenance of MD Pickup
Procedures of Changing the MD Pickup
Self-diagnosis Function of MD

1-2
1-3~16
2-1
2-12
2-23
2-23
2-24

COPYRIGHT 1999 VICTOR COMPANY OF JAPAN, LTD.

Block Diagrams
Standard Schematic Diagrams (XM-P55)
Standard Schematic Diagrams (XM-PJ1)
Printed Circuit Boards
Parts List (XM-P55)
Parts List (XM-PJ1)

2-27
2-29
2-36
2-42,43
3-1~15
4-1~15

No.20738

Jan. 1999

XM-P55
XM-PJ1

Safety Precaution

CAUTION

CAUTION

Burrs formed during molding may be left over on some parts of the chassis. Therefore,
pay attention to such burrs in the case of preforming repair of this system.

Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.

1-2 4-15

Description of Major ICs

CXA2523AR(IC310):MD RF & Servo

1.Block Diagram

BOTM

ABCD34FE33AUX32ADFG31ADAGC30ADIN29ADFM28SE27CSLED26TE25WBLADJ

36 35

XM-P55

XM-PJ1

37

PEAK

38

RF

39RFAGC

40AGCI

41COMPO

42COMPP

43ADDC

44OPO

45OPN

46RFO

47MORFI

48

MORFO

2.Pin Function

AGC, EQ

Comp

USER

USER

OP Amp

RF Amp

1 2

I

ADIP Amp TE/SE Amp

MUX FE Amp

Peak, Bottom Detector

ABCD Amp

3T Detector

I-V Amp APC

3VC4A5B6C7D8E9F10PD11

J

CPU

Command I/F

TEMP Amp

12

APC

APCREF

24

Vcc

23

3TADJ

22 EQADJ

21 VREF

20 F0CNT

19 XSTBY

18 XLAT

17 SCLK

16 SWDT

15 TEMP R

14 TEMP I

13 GND

Pin No.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20

Symbol

I

J

VC

A
B
C
D
E
F

PD

APC

APCREF

GND

TEMPI

TEMP R

SWDT

SCLK
XLAT

XSTBY

F0CNT

I/O

I-V converted RF signal I input.

I

I-V converted RF signal J input.

I

Vcc/2 voltage output.

O

A current input for main beam servo signal.

I

B current input for main beam servo signal.

I

C current input for main beam servo signal.

I

D current input for main beam servo signal.

I

E current input for side beam servo signal.

I

F current input for side beam servo signal.

I

Reflection light quantity monitor signal input.

I

Laser APC output.

O

Reference voltage input for the laser power intensity setting.

I

Connect to GND.

­Connects the temperature sensor.

I

Connects the temperature sensor. outputs the reference voltage.

I

Data input for microcomputer serial interface.

I

Shift clock input for microcomputer serial interface.

I

Latch signal input for microcomputer serial interface.Latched when low.

I

Standby setting pin. Normal operation when high Standby when low.

I

Internal current source setting pin.

I

Function

2-1

XM-P55
XM-PJ1

Pin No.

21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48

Symbol

VREF

EQADJ

3TADJ

Vcc

WBLADJ

TE

CSLED

SE

ADFM

ADIN

ADAGC

ADFG

AUX

FE
ABCD
BOTM

PEAK

RF

RFAGC

AGCI
COMPO
COMPP

ADDC

OPO
OPN
RFO

MORFI

MORFO

I/O

Reference voltage output.

O

Equalizer center frequency setting pin.

I/O

BPF3T center frequency setting pin.

I/O

Power supply.

­BPF22 center frequency setting pin.

I/O

Tracking error signal output.

O

Connects the sled error signal LPF capacitor.

­Sled error signal output.

O

ADIP FM signal output.

O

ADIP signal comparator input.

I

Connects the ADIPAGC capacitor.

­ADIP2 binary value signal output.

O

13 output / temperature signal output. Switched with serial commands.

O

Focus error signal output.

O

Reflection light quantity signal output for the main beam servo detector.

O

RF/ABCD bottom hold signal output.

O

Peak hold signal output for the RF/ABCD signals.

O

RF equalizer output.

O

Connects the RFAGC capacitor.

­RFAGC input.

I

User comparator output.

O

User comparator non-inverted input.

I

Connects the capacitor for ADIP amplifier feedback circuit.

I/O

User operational amplifier output.

O

User operational amplifier inverted input.

I

RF amplifier output. Eye pattern checkpoint.

O

Input of the groove RF signal with AC coupling.

I

Groove RF signal output.

O

Function

2-2

CXA8069M(IC450):Sensorless Motor Driver

1.Pin Layout

48 37

36

XM-P55

XM-PJ1

2.Block Diagram

VS

WF

VF
UF

COMF

CPOUT

CPC2

CP2

CPC1

CP1

VCO

RMAX

RMIN

12 1

13 24

Charge
Pump

VCO

25

UIN

VIN

Voltage Driver

WIN

+ -+ -+ -

Sensorless
Logic

COM

UOUT

Power Stage

Level Shifter

VOUT

WOUT

Sample

and Hold

PGND
RF

CF

GND

FC
FG2

FG

VCOIN

VCC

Phase

Comparator

Timing

Controllor

MCLOCK

1/8

S/S

PWM

F/R

BRAKE

Full Wave
Rectifier

Controllor

+ -

VCONT

RESET
CLOCK

SLOPE
OSC

VCREF

2-3

XM-P55
XM-PJ1

Pin Functions

Pin

Pin Name Functions

No.

2-4

Non connection
Detection of motor current
Motor driven power supply
Non connection
Connect first condenser of charge pump to this terminal.
Connect first condenser of charge pump to this terminal.
Connect second condenser of charge pump to this terminal.
Connect second condenser of charge pump to this terminal.
Connect last condenser of charge pump / VG external input
Ground of circuits except for output section
Start / Stop
Brake
Speed control
Reference voltage of speed control
FG pulse output
FG pulse output when pin15 FG signal goes half round
Correction of frequency characteristic of speed control loop
Setting of VCO oscillation frequency
Setting of VCO maximum oscillation frequency
Setting of VCO minimum oscillation frequency
Forms motor waveform
Forms motor waveform
Forms motor waveform
Forms motor waveform
VCO oscillation frequency control
Monitors CLOCK signal
Ground of circuits except for output section
Sample board for output current detection
Forms saw-tooth wave for PWM wave formation
Forms santooth waveform for soft switching wave formation
Clock input
Power supply except for output section
Non connection
Motor driven power supply
Detection of motor current
Non connection
Reset for operation check
Detection of counter electromotive voltage
Motor source output
Non connection
Detection of counter electromotive voltage
Motor source output
Non connection
Non connection
Detection of counter electromotive voltage
Motor source output
Detection of motor common voltage
Ground for output guard

CXD2655R (IC351):Digital Servo Processor

Block Diagram

XM-P55

XM-PJ1

2-5

XM-P55
XM-PJ1

Pin Function Description

Pin

Symbol

No.

Functions and Operations

Monitor input and output
Monitor output
Monitor output
Monitor output
Data input of microcomputer serial interface
Shift lock input of microcomputer serial interface

Latch input of microcomputer serial interface/
Latch at the Falling edge

Date output of microcomputer serial interface

Output of internal status corresponding to
microcomputer serial interface address

Reset input L : reset
Disc sub cord Q sync / ADIP sync output
Test pin
Input of external audio data to internal DAC
DAC power supply
Integrated DAC Lch output
Crystal oscillation circuit input (512Fs=22.5792MHz)
Crystal oscillation circuit output (Inverted output of OSCI)
Integrated DAC Rch output
DAC ground
Test pin
Detection of Lch zero data / flag output
Out put of digital audio interface signal

Interrupt request output L: When the interrupt
status occurs.

Output of audio date to external audio block
LRCK to external audio block (44.1kHz)
Output pin (2.8224MHz)
256Fs output (11.2896MHz)
Digital power supply
External DRAM address output
External DRAM address output
External DRAM address output
External DRAM address output
External DRAM address output
External DRAM address output
External DRAM address output
External DRAM address output
External DRAM address output
External DRAM address output
External DRAM address output
Digital ground
External DRAM output enable
External DRAM CAS output
External DRAM address output
External DRAM RAS output
External DRAM write enable
External DRAM date bus
External DRAM date bus
External DRAM date bus
External DRAM date bus
External VCO (784Fs) clock input

Pin
No.

Symbol

Functions and Operations

Playback EFM full-swing output
Playback EFM comparator slice voltage input
Analog power supply
Playback EFM comparator bias current input
Playback EFM RF signal input
Analog ground

Phase comparison output for analog PLL of
EFM decoder

Phase comparison output for master PLL of
playback digital PLL

Filter input for master PLL of playback digital PLL
Filter output for master PLL of playback digital PLL

Internal VCO control voltage input for master PLL of
playback digital PLL

Peak hold signal input for quantity of light
Bottom hold signal input for quantity of light
Signal input for quantity of light
Focus error signal input
Auxiliary input 1
Center voltage input
Monitor output of A/D converter input signal
Analog power supply

Input of upper-limit voltage of the A/D converter
operating range

Input of lower-limit voltage of the A/D converter
operating range

Analog ground
Sled error signal input
Tracking error signal input
Auxiliary input 2
Connect to the low-impeddance power supply
Error signal input for laser digital APC
ADIP binary FM signal (22.05
Output for setting of CXA 2523 current source
Latch output for CXA 2523 control
Shift lock output for CXA 2523 control
Data output for CXA 2523 control
Reference PWM output for laser APC
PWM output for laser digital APC
Tracking servo drive PWM output (
Tracking servo drive PWM output (
Digital power supply
Focus servo drive PWM output (
Focus servo drive PWM output (
4Fs output (176.4kHz)
Sled servo drive PWM output (
Sled servo drive PWM output (
Spindle servo drive PWM output (
Spindle servo drive PWM output (
FG input of spindle CAV servo
Test pin
Test pin
Test pin
Digital ground
Detection of Rch zero date / flag output

1kHz) input

)
)

)
)

)
)

)
)

2-6

HD6433045SV14X (IC501): Beams Microcomputer

Terminal Layout

Block Diagram

XM-P55

XM-PJ1

Port 3

Address bus

Data bus (upper level)

Data bus (lower level)

Clock generator

Port 4

Port 5Port 2

Interrupt controller

DMA

ROM

Mask ROM

Port 6Port 8

PROM
Flash memory

RAM

16 bits

integrated

timer unit

(ITU)

controller

(DMAC)

Refresh

controller

Watch dog timer

(WDT)

Serial communication

interface (SCI)

2ch

Bus Controller

Port 1Port 9

Programmable

timing pattern

controller (TPC)

A/D converter

D/A converter

Port B Port A Port 7

2-7

XM-P55
XM-PJ1

Description

Pin

Symbol

No.

Function and Operation

Power supply

Communications line terminals to CXA2523AR,
connect to XSTB terminal
Communications line terminals to CXA2523AR,
connect to SWDT terminal
Communications line terminals to CXA2523AR,
connect to SCLK terminal
Communications line terminals to CXA2523AR,
connect to XLAT terminal

Non connection
Non connection
Connect to XRST terminal of CXD2655R
Connect to XLAT terminal of CXD2655R
Supplies +12V when flash memory is writing.
Ground
Remote control UART output
Connect to SWDT terminal of CXD2655R
Remote control URAT input
Connect to SRDT terminal of CXD2655R
Non connection
Connect to SCLK terminal of CXD2655R
RF source pre-charge output
Laser ON / OFF output
RF source OFF output
Sled driven voltage ON/OFF
Ground
Clear signal of power supply circuit flip-flop
MUTE output for audio circuit
Starting control output
Debug / test mode
Parallel mode monitor
Parallel mode monitor
Parallel mode monitor
Parallel mode monitor
Debug / test mode
Debug / test mode
Debug / test mode
Sleep function enable input
Power supply
Non connection
Non connection
Non connection
Non connection
Non connection
Non connection
Non connection
Non connection
Ground
Non connection
Ground
Non connection
Non connection
LSI source down detective input
ALL tracks repeat key input

Pin
No.

Symbol

Function and Operation

Connect to MPC17A39 power save terminal
Connect to CXA8069 start / stop terminal
CXD2655R monitor output selection
CXD2655R monitor output selection
CXD2655R monitor output selection
CXD2655R monitor output selection
Ground
PLAY key input
Starting signal output for power supply circuit
Remote control power OFF
Non connection
Power supply
Microcomputer reset input
Power supply
Ground
Connect to Crystal NAX0275-001X
Connect to Crystal NAX0275-001X
Power supply
EEPROM2 chip select terminal output
EEPROM communication serial clock output
EEPROM communication serial DATA output
EEPROM chip select terminal output
Power supply
Power supply
Power supply
Power supply
Power supply
Key input (analog)
Non connection
Non connection
Battery voltage input (analog)
Non connection
Connect to temperature-detective thermistor
Remote control PLAY key input
Disc detective switch input
Ground
Connect to XINT terminal of CXD2655R
Connect to SQSY terminal of CXD2655R
Non connection
Non connection
Non connection
Ground
Connect to MINT0 terminal of CXD2655R
Non connection
Connect to BEEP of audio circuit
Connect to MINT3 terminal of CXD2655R
Connect to SENS terminal of CXD2655R
EEPROM communication serial data input
Non connection
ACTIVE CLEAR BASS circuit ON / OFF output

2-8

MPC17A39DTB-X (IC400):4Channel Bridge Driver

XM-P55

XM-PJ1

Terminal Layout

Block Diagram

Pin Function Description

Pin
No.

Symbol

Functions and Operations

DC / DC Converter circuit ground
External CLOCK input connection
Standby mode control
Output enable
Driver power supply
Driver output
Power ground
Driver output
Driver power supply
Driver power supply
Driver output
Power ground
Driver output
Driver power supply
CH 1 control signal input
CH 1 control signal input
CH 2 control signal input
CH 2 control signal input

Pin

No.

Symbol

Functions and Operations

CH 4 control signal input
CH 4 control signal input
CH 3 control signal input
CH 3 control signal input
Driver output
Driver output
Power ground
Power ground
Driver power supply
Driver power supply
Driver output
Power ground
Driver output
Driver power supply
Control circuit ground

DC / DC Converter boosting inductance, diode ground

Control circuit power supply
Pre-driver circuit power supply

2-9

XM-P55
XM-PJ1

MB3800PFV-W(IC931):Switching Regulator Controller

Terminal Layout

Block Diagram

Reference

voltage

Soft start

S.C.P

Pin Function Description

Pin No. Symbol Functions and operations

Error amplifier inversion input
Soft start, capacity for SCP setting connection
Power supply
Output current setting, control
Totem-pole output
Ground

Capacity for oscillation frequency setting, resistant connection

Error amplifier output

Santooth

wave generator

Output drive

control circuit

2-10

MN41X17400CTT10X(IC391):DRAM

XM-P55

XM-PJ1

Terminal Layout

Block Diagram

RAS
CAS

0 10

0

10

VSS
VDD

0 10

Row
Address
Buffer

Column
Address
Buffer

On Chip
VBB
Generator

Clock Generator

CBR Refresh
Counter

Row

Decoder

Pin Functions

Symbol

Word

Driver

Function
Address input
Row address / strove
Column address / strove
Write enabling input.
Output enabling input.
Data input
Power supply (

3.3V)
Power supply (0V)
Non connection

Memory
Cell

Sense.
Amp

Column
Decoder

I/O

Selector

Write
Clock
Generator

Data
Input
Buffer

Data
Output
Buffer

WE

DQ0

DQ3

OE

2-11

XM-P55
XM-PJ1

Removal of Main Parts

<XM-P55 Section>

Removing the MD Door Assembly and

the Bottom Cover (See Fig.1 to 4)

1.

Move the door lever and open the door.

2.

Remove the four A screws attaching the MD door
assembly and remove the MD door assembly from the
body.

Reverse the body and remove the six B screws attaching

3.
the bottom cover.

Release the joint a outside and remove the bottom cover

4.
from the body.

CAUTION: When reassembling the bottom cover, fit the

part b of the hold knob slot to the hold
switch on the main board (See Fig.4, 5).

A

MD door assembly

MD door
assembly

Fig.1

A

B

Bottom cover

B

B

Part b

Part a

Door lever

B

Fig.2

Bottom cover

B

B

Fig.4Fig.3

2-12

XM-P55

XM-PJ1

Removing the Main Board

(See Fig.5 to 7)

1.

Remove the three C screws and the screw D attaching
the main board.

2.

Unsolder the part c of the battery terminal.

3.

Open the battery lid and remove it from the flame
assembly.

Remove the headphone jack assembly while pulling the

4.
cabinet assembly of the headphone jack outwards.

Move the main board in the direction of the arrow in Fig.6

5.
and remove it upward from the two parts d of the
bending on the flame assembly.

Disconnect the flexible harnesses from connector CN300

6.
and CN401 on the reverse side of the main board.

C

Main board

Main board

Hold switch

D

C

Part c : unsoldering

Fig.5

Parts d

CN401

Flame assembly

Headphone jack assembly

Battery lid

Fig.6

Main board

Fig.7

CN300

2-13

XM-P55
XM-PJ1

Removing the Mechanism Assembly

(See Fig.8)

1. Remove the two E screws attaching the mechanism
assembly and remove the mechanism assembly from the
flame assembly.

Flame assembly

E

Mechanism assembly

E

Fig.8

2-14

Removal of Main Parts

<XM-PJ1 Section>

Removing the Bottom Cover

(See Fig.1 to 3)

1.

1.

Move and remove the battery lid of the bottom cover
assembly on the side of the body in the direction of the
arrow.

2.

2.

Remove the two A screws attaching the bottom cover on
the bottom of the body.

3.

Remove the two B screws attaching the bottom cover on

3.
the side of the body.

Remove the bottom cover from the body while releasing

4.

4.
the tab a of the bottom cover on the side of the hold
switch to the inside.

CAUTION: When reassembling, make sure that the

convexity of the hold switch is fitted to the
concave of the switch knob before inserting
the tab a of the bottom cover assembly.

Bottom cover assembly

XM-P55

XM-PJ1

Battery lid

Bottom cover assembly

B

Fig. 1

Battery lid

A

Hold switch

A

Fig. 2

Bottom cover assembly

Fig. 3

Switch knobJoint a

2-15

XM-P55
XM-PJ1

Removing the Front Cover Assembly

(See Fig.4)

1.

Remove the bottom cover assembly.

2.

Remove the two C screws attaching the front cover
assembly, and remove the front cover assembly while
turning it in the direction of the arrow in the Fig.4.

Removing the Cabinet (See Fig.5 to 8)

1.

Remove the bottom cover assembly.

2.

Remove the front cover assembly.

3.

Remove the screw D attaching the cabinet on the upper
side of the body.

4.

Reverse the body and remove the two E screws attaching
the cabinet on the back of the body.

Release the two joints b on the flame assembly side of

5.
the battery case in the direction of the arrow, and remove
the cabinet from the flame assembly.

Unsolder the two harnesses (one is orange, the other is

6.
gray) connected to the main board. Disconnect the
battery connector B with the brown harness by pulling
upward.

CAUTION: When reassembling, attach the harnesses

with a double-sided tape to the part c on the
inside of the cabinet (See Fig.8).

C

Cabinet

Flame assembly

C

Front cover assembly

Fig. 4

D

Main board

Fig. 5

2-16

Cabinet

Main board

Fig. 7

Unsoldering

Battery connector B

Joints b

Part c

Cabinet

E

Fig. 6

Cabinet

Main board

Fig. 8

Removing the Main Board

(See Fig.9 to 11)

1.

Remove the four F screws attaching the main board.

2.

Remove the headphone jack fixed with a double-sided
tape upward.

3.

Unsolder the part d of the main board.

4.

Remove the flexible harness 1 fixed to the front side of
the flame assembly with a double-sided tape.

5.

Move the battery terminal e from the flame assembly
upward.

Move the main board to the inside, and remove it upward

6.
while releasing it from the two hinges f on the bending of
the flame assembly.

Disconnect the flexible harnesses from connector CN300

7.
and CN401 on the reverse side of the main board.

CAUTION: When reattaching the flexible harness 1,

position it to the six g points and fix it with a
double-sided tape (See Fig.10).

Headphone jack

F

Main board

Main board

F

Fig. 9

F

Joints f

Part d

F

XM-P55

XM-PJ1

Battery
terminal e

F

Positioning

points g

F

Positioning points g

Positioning points g

Fig. 10

Main board

CN401

CN300

Fig. 11

2-17

XM-P55
XM-PJ1

Removing the Door Cover

(See Fig.12, 13)

Remove the bottom cover.

1.
Remove the front cover.

2.
Remove the cabinet.

3.
Push the lower part of the door lock lever outside on the

4.
lower front side of the body, and open the door.

Remove the two G screws attaching the door cover on

5.
both sides of the body, and remove the door cover.

CAUTION: When reattaching the flexible harness 1,

position it to the six g points and fix it with a
double-sided tape (See Fig.10).

Door cover

G

Door lock lever

Fig. 12

Door cover

G

Removing the Mechanism Assembly

(See Fig.14)

1.

Remove the bottom cover.

2.

Remove the front cover.

3.

Remove the cabinet.

4.

Remove the main board.

5.

Remove the two H screws attaching the mechanism
assembly and remove the mechanism assembly from the
flame assembly.

Door lock lever

Mechanism assembly

H

Flame assembly

Fig. 13

Flame assembly

H

2-18

Fig. 14

<Removal of MD Mechanism Assembly>

Removing the Holder Assembly

(See Fig.1, 2)

Turn the holder assembly as shown in Fig.1.

1.
Push the stopper of the holder assembly to release its

2.
tab, and turn the holder assembly as shown in Fig.2.
Move the part a of the holder assembly in the direction of
the arrow and release its U-shaped notch from the shaft
of the chassis assembly.

Push the part b of the holder assembly and pull out the

3.
holder assembly from the shaft of the chassis assembly.

CAUTION: When reassembling, first attach the part (b)

of the holder assembly to the shaft of the
chassis assembly. Next, attach the U-shaped
notch to the shaft.

XM-P55

XM-PJ1

Holder Assembly

Stopper

Push inside

Fig.1

Holder assembly

Shaft

U-shaped notch

Removing the Spindle Motor

(See Fig.3)

1.2.Unsolder the part c of the flexible harness connected to
the spindle motor.

Remove the three A screws attaching the spindle motor
and remove the spindle motor from the chassis assembly.

Chassis assembly

A

Part a

Fig.2

Chassis assembly

Part b

Chassis assembly

Part c : unsoldering

A

Fig.4

Fig.3

Spindle motor

2-19

XM-P55
XM-PJ1

Removing the Pickup Unit

(See Fig.4, 5)

1.

Remove the slit washer on the reverse side of the MD
mechanism and remove the worm gear.

2.

Remove the screw B and the hold spring.
Detach the shaft of the pickup unit on the feed motor

3.
side, and the other side.

Remove the spacer of the flexible harness extending from

4.
the pickup unit (marked d), and remove the pickup unit
from the chassis assembly.

Slit washer

Worm gear

B

B

Chassis assembly

Hold spring

Removing the Pickup (See Fig.5, 6)

1.2.Remove the screw C from the pickup unit and the lead
spring.

Pull out the main shaft from the pickup.

d

Guide base

Fig.4

B

Hold spring

Part e

Pickup unit

Shaft

2-20

Pickup

C

Lead spring

Feed motor

Fig.5

Main shaft

Fig.6

(Fold fast.) (Attach a spacer.) (Fix fast not to unfold.) (Fold fast.)

<Reassembling the Pickup Unit>

1.

Prior to performing the following procedures, fold the
flexible harness of the pickup unit (see Fig.7,8 and 9). Fix
the flexible harness with a spacer not to unfold.

2.

Attach the U-shaped slot of the pickup marked ’e’ to the
guide base.

For the shaft, firstly attach its shaft base side and next

3.
attach its feed motor base side.

XM-P55

XM-PJ1

Fig.7

B

Hold spring

Part e

Pickup unit

Shaft

Attach a spacer to the folded flexible harness and fix the

4.
flexible harness to the chassis assembly (see Fig.7, 8).

Attach a spacer between the chassis boss and the

5.
flexible harness (see Fig.9).

Make sure that the flexible harness is folded fast and

6.
fixed to the right position.

Attach a spacer

Guide base

Feed motor

Fig.5

Attach a spacer

Attach this position

Fig.8

Chassis assembly

Flexible harness

Spacer

Chassis boss

Spacer

Chassis boss

Fig.9

2-21

XM-P55
XM-PJ1

Removing the Feed Motor/ Screw
Shaft Assembly and Wheel Gear

1.

Unsolder the two harnesses extending from the feed
motor.

2.

Remove the screw D attaching the feed motor, then the
spring. Remove the feed motor from the feed motor base.

Lift the feed motor base and pull out the screw shaft

3.
assembly.

Screw shaft gear

Shaft base

Feed motor

Wheel gear

D

D

Spring

Feed motor base

Soldering

Fig.10

2-22

XM-P55

XM-PJ1

Maintenance of MD Pickup

1. Cleaning of pickup lens

(1) Prior to changing the pickup, clean the pickup lens.

(2) For cleaning the lens, use the following cotton swab after
mearsing it in alcohol.

Product No. JCB-B4; Manufacturer;Nippon Cotton Swab

2. Confirmation of the service life of laser
diode when the service life of the laser
diode has been exhausted, the following
symptoms will appear.

(1) Recording will become impossible.

(2) The RF output (EFM output and eye pattern amplitude)
will become lower.

(3) The drive current required for light emitting of laser diode
will be increased.

Confirm the service life according to the following flow chart:

Procedures of Changing
the MD pickup

Change the MD pickup by referring

to "Removing the MD pickup" in the

Disassembly Method.

Set the pickup to [TEST] mode according

to the procedures described in the

Adjustment Method.

Adjust the laser power 75 .

Adjust the disc.

How to operation

Return to feed .

Can the laser power

adjust under test mode?

Is the power output

750

Is the drive current

of laser diode

45mA or less?

YES

YES

NO

Change the pickup

NO

Change the pickup

OK.

3. Method of measuring the drive current of
laser diode

When the voltage measured at the both side of carbon resistor
R301 on the MD servo P.C. board (VMW2424A) have become
45mV or over, the service life of the laser diode is judged to have
been exhausted.

Adjust the Pre D
have been become OK

Return to feed .

Adjust the Mo D
have been become OK

Completion of changing the MD pickup.

Since this system is designed to perform magnetic
recording, the laser power ten times or over of the
conventional MD player will be output. Therefore, be
sure to perform not only adjustment and operation
of this system so carefully as not to directly look at the
laser beam or touch on the body.

4. Semi-solid state resistors on
the APC P.C. board

The semi-solid state resistor on the APC P.C.board
attached to the pickup is used for adjusting the laser
power. Since these resistor should be adjusted in
pair according to the characteristics of the optical
block, be sure not to touch on the resistors.

Since the service life of the laser diode will be
exhausted when the laser power is low, it is
necessary to change the pickup. Meanwhile, do not
pickup. Otherwise, the pickup will be damaged due
to over current.

2-23

XM-P55
XM-PJ1

Self diagnosis Function of MD

Power Supply ------------- Use to a battery charger by more than 1.3volt
Establishment ------------ Set up the horizontal

1. The method of changing to the self-diagnosis mode turns off
the power supply of the main body first.

2. The power supply of the main body is turned on while pushing
"PLAYMODE +DISPLAY+A.B.BASS "of the remote control unit at the same time.

3. It changes into the self-diagnosis mode, and the self-diagnosis starts.

Test 's Command for the self-diagnosis mode

Command data1 data2 data3 data4 data5 data6 data7
Ope.mode State PLY P REC P EEP R EEP S

[Indicators on the display
of the remote control]

Play Mode button

A.C.BASS

=00: Wait to Test command
=DD: Going to Resume's EEPROM initialize
=DE: Going to servo's EEPROM initialize
=E2: Turn on the leaser of PLAY
=D3: Turn up the laser
=D4: Turn down the laser
=D1: Turn off the laser
=D5: Rewind to the FEED
=D6: Adjust to the PRE DISC
=D7: Adjust to the MO DISC
=92: Break out the trouble

DISPLAY button

VOL

The following are displayed
and it stops at the NG generation.

The KEY input afterwards
is disregarded.

FAV

Repeat

Battery

2-24

A.C.BASS

(Active Clear Bass) button

JOG
MODE

Disc
mark

BASS

Random

MONO

Self-diagnosis Fllow Chart

XM-P55

XM-PJ1

Rewind to the FEED

by PLAY

Turn on the laser

Recieve time out

at 200ms

Except to

recieve DF:E2.

Issue to

Push to "BASS"

E2

Recieve time out

at 200ms

Except to

DF

Issue to

recieve DF:00.

Recieve DF:00

Recieve time out

at 200ms

Except to

recieve DF:D1.

Issue to

Issue to

Push to "VOL -" Push to "SHIFT"

Issue to

Push to "VOL +"

Recieve DF:D1

"D1"

Recieve DF:00

"D4:01"

Except above it

Recieve DF:00:XX:YY

"D3:01"

Recieve time out

at 200ms

Recieve DF:00

DF

Issue to

(Lock to display at 2sec)

Recieve time out at 200ms

Recievable above it.

START

DB

Issue to

Recieve DF:00

Recieve time out

at 200ms

Except to

Recieve time out

at 200ms

Except to

recieve DF:DD.

Recieve DF:00

DE

Issue to

Push to "BASS"

Recieve time out

at 200ms

Except to

recieve DF:DD.

Recieve DF:00

DE

Issue to

Initial to resume Initial to the servo

Push to "BASS"

Recieve time out

Processer Processer

recieve DF:DD.

at 200ms

Except to

recieve DF:DD.

DE

Issue to

DE

Issue to

Recieve DF:00:XX:YY

Recieve DF:00

(Lock to display at 2sec)

Recieve DF:00

(Lock to display at 2sec)

2-25

XM-P55
XM-PJ1

Recieve time out

at 200ms

Except to

recieve DF:D7

Recieve time out

at 200ms

Except to

recieve DF:00

Adjust t MO-D

Push to "BASS"

Recieve time out

at 200ms

Except to

recieve DF:D6

Receive DF:D7

D7

Issue to

Receive DF:D6

D6

Issue to

Recieve time out

at 200ms

Except to

DF

Issue to

recieve DF:00

DF

Issue to

Receive DF:00

Receive DF:00

(Lock to display at 2sec)

OK

(Lock to display at 2sec)

Rewind to FEED Adjust PRE -D

Rewind to FEED

Recieve time out

at 200ms

Except to

Push to "BASS" Push to "BASS"

recieve DF:D5

D5

Issue to

Receive DF:D5

Recieve time out

at 200ms

Processor Processor Processor

Except to

recieve DF:00

DF

Issue to

Receive DF:00

(Lock to display at 2sec)

OK OK

2-26

Block Diagrams

XM-P55

XM-PJ1

PICKUP

SLED

SPINDLE

FCS, TRK

RF IC DSP

Servo

DRIVER

DRIVER

Each Block

POWER
SUPPLY

Micro
computer

CNT

16M D RAM

ACB BEEP

MUTE

REMOTE
CONTROL

Audio

HP JACK

LEVEL DIAGRAM

ACB Circuit

Headphone AMP

2-27

XM-P55
XM-PJ1

-MEMO-

2-28

Standard Schematic Diagrams

XM-P55 (Except to U.S.A.)

XM-P55

XM-PJ1

BLOCK B

BLOCK D

5

4

3

2

1

BLOCK A

BLOCK C

ABCD

2-29

XM-P55
XM-PJ1

BLOCK A

XM-P55 (Except to U.S.A.)

To BLOCK B

5

4

3

To BLOCK C

2

1

2-30

Digital signal

ABCD

XM-P55 (Except to U.S.A.)

XM-P55

XM-PJ1

5

BLOCK B

4

3

To BLOCK D

2

1

To BLOCK A

Digital signal
Analogue signal

ABCD

2-31

XM-P55
XM-PJ1

5

4

BLOCK C

XM-P55 (Except to U.S.A.)

To BLOCK D

To BLOCK A

3

2

1

2-32

ABCD

XM-P55

XM-PJ1

5

4

BLOCK D

XM-P55 (Except to U.S.A.)

To BLOCK B

3

2

1

To BLOCK C

ABCD

2-33

XM-P55
XM-PJ1

-MEMO-

2-34

XM-P55

XM-PJ1

XM-P55J ONLY

5

4

3

2

1

ABCD E F G

2-35

XM-PJ1 (Except to U.S.A.)

Digital signal

BLOCK A

To BLOCK B

To BLOCK C

XM-PJ1(Except to U.S.A.)

XM-P55
XM-PJ1

5

4

B BLOCK

D BLOCK

3

2

1

A BLOCK

C BLOCK

2-36

HABC DEFG

XM-P55

XM-PJ1

5

4

BLOCK B

XM-PJ1(Except to U.S.A.)

3

2

1

Digital signal

To BLOCK A

ABCD

Anologue signal

To BLOCK C

2-37

XM-P55
XM-PJ1

5

4

BLOCK C

XM-PJ1(Except to U.S.A.)

To BLOCK D

3

To BLOCK A

2

1

2-38

ABCD

BLOCK D

XM-PJ1(Except to U.S.A.)

5

4

XM-P55

XM-PJ1

3

To BLOCK B

2

1

To BLOCK C

ABCD

2-39

XM-P55
XM-PJ1

-MEMO-

2-40

XM-P55

XM-PJ1

XM-PJ1 J ONLY

5

4

3

2

1

ABCD E F G

2-41

Printed Circuit Boards

XM-P55
XM-PJ1

Main board

5

Block No.

XM-P55 ONLY

(Parts side)

: chip parts

(Solder side)

4

3

2

1

2-42

HABC DEFG

XM-P55

XM-PJ1

Switch Board

Block No.

5

4

Block No. Headphone Jack Board

3

2

1

ABCD

2-43

XM-P55
XM-PJ1

-MEMO-

2-44

PARTS LIST

[ XM-P55 ]

* All printed circuit boards and its assemblies are not available as service parts.

XM-P55

XM-PJ1

Area Suffix

B
E
EE
EN
J
UB
US
UT
UX
UY

U.K. (BU,SL)
Continental Europe (BU,SL)
Russian Federation (BU,SL)
Northern Europe (BU,SL)
U.S.A. (SL)
Hong kong (BU,GN,SL)
Singapore (BU,SL)
Taiwan (SL)
Saudi Arabia (SL)
Argentina (SL)

- Contents -

Exploded View of General Assembly and Parts List ..............................................3-2

MD Mechanism Ass'y and Parts List .....................................................................3-4

Electrical Parts List ................................................................................................3-6

Packing Materials and Accessories Parts List (J) .................................................3-10

Packing Materials and Accessories Parts List (E/EE/EN) .................................... 3-12

Packing Materials and Accessories Parts List (B/UB/US/UT/UX/UY) .................. 3-14

3-1

XM-P55
XM-PJ1

General Exploded View and Parts List

Block No

5

4

3

(MODEL:XM-P55)

2

44

1

3-2

ABCD

XM-P55

XM-PJ1

3-3

XM-P55
XM-PJ1

MD Mechanism Ass’y and Parts List

(MODEL:PPM)

5

4

Block No.

3

2

1

3-4

ABCD

XM-P55

XM-PJ1

3-5

XM-P55
XM-PJ1

Electrical Parts List

¡¡

¡¡

¡ Main board

3-6

XM-P55

XM-PJ1

3-7

XM-P55
XM-PJ1

3-8

XM-P55

XM-PJ1

¡¡

¡¡

¡ Headphone Jack board

¡¡

¡¡

¡ Switch board

3-9

XM-P55
XM-PJ1

Packing Materials and Accessories Parts List

J Ver sion Section

5

4

Block No.

Block No.

3

2

turn up
turn down

1

3-10

ABCD

¡¡

¡ Packing Parts list

¡¡

¡¡

¡ Accessories Parts list

¡¡

XM-P55

XM-PJ1

3-11

XM-P55
XM-PJ1

Packing Materials and Accessories Parts List

E/EE/EN/ Ver sion Section

Block No.

Block No.

5

4

3

2

turn up
turn down

1

3-12

ABCD

¡¡

¡ Packing Parts list

¡¡

¡¡

¡ Accessories Parts list

¡¡

XM-P55

XM-PJ1

3-13

XM-P55
XM-PJ1

Packing Materials and Accessories Parts List

B/UB/US/UT/UX/UY/ Ver sion Section

Block No.

Block No.

5

4

3

2

1

3-14

turn up
turn down

ABCD

¡¡

¡ Packing Parts list

¡¡

¡¡

¡ Accessories Parts list

¡¡

XM-P55

XM-PJ1

3-15

XM-P55
XM-PJ1

-MEMO-

3-16

PARTS LIST

* All printed circuit boards and its assemblies are not available as service parts.

[ XM-PJ1 ]

B
E
EE
EN
J
UB
US
UT
UX
UY

Area Suffix

U.K. (BU)
Continental Europe (BU)
Russian Federation (BU)
Northern Europe (BU)
U.S.A. (BU)
Hong kong (BU,GD)
Singapore (BU)
Taiwan (BU)
Saudi Arabia (BU)
Argentina (BU)

- Contents -

Exploded View of General Assembly and Parts List ............................................. 4-2

MD Mechanism Ass'y and Parts List .....................................................................4-4

Electrical Parts List ................................................................................................4-5

Packing Materials and Accessories Parts List (J) .................................................4-10

Packing Materials and Accessories Parts List (E/EE/EN) .................................... 4-12

Packing Materials and Accessories Parts List (B/UB/US/UT/UX/UY) .................. 4-14

XM-P55

XM-PJ1

4-1

XM-P55
XM-PJ1

General Exploded View and Parts List

(MODEL:XM-PJ1)

5

4

Block No.

C991

J991

3

2

1

4-2

ABCD

XM-P55

XM-PJ1

4-3

XM-P55
XM-PJ1

MD Mechanism Exploded View and Parts List

MD Mechanism as same as XM-P55.
Please refer of the page 3-4 and 3-5.

Block No.

4-4

Electrical Parts List

XM-P55

XM-PJ1

¡¡

¡¡

¡ Main board

4-5

XM-P55
XM-PJ1

4-6

XM-P55

XM-PJ1

4-7

XM-P55
XM-PJ1

4-8

XM-P55

XM-PJ1

¡¡

¡¡

¡ Headphone Jack board

¡¡

¡¡

¡ Switch board

4-9

XM-P55
XM-PJ1

Packing Materials and Accessories Parts List

J Ver sion Section

Block No.

Block No.

5

4

3

2

1

4-10

turn up
turn down

ABCD

¡¡

¡ Packing Parts list

¡¡

¡¡

¡ Accessories Parts list

¡¡

XM-P55

XM-PJ1

4-11

XM-P55
XM-PJ1

Packing Materials and Accessories Parts List

E/EE/EN/ Ver sion Section

Block No.
Block No.

5

4

3

2

1

4-12

turn up
turn down

ABCD

¡¡

¡ Packing Parts list

¡¡

¡¡

¡ Accessories Parts list

¡¡

XM-P55

XM-PJ1

4-13

XM-P55
XM-PJ1

Packing Materials and Accessories Parts List

B/UB/US/UT/UX/UY/ Ver sion Section

A1 A4

5

4

Block No.

Block No.

3

2

1

4-14

turn up
turn down

ABCD

Packing Parts List

Accessories Parts List

XM-P55
XM-PJ1

XM-P55
XM-PJ1

VICTOR COMPANY OF JAPAN, LIMITED

AUDIO DIVISION,10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan

(No.20738)

Printed in Japan
9901 (V )