Sony HCD-NXM1 Service Manual

HCD-CP555/NXM1

SERVICE MANUAL

Ver 1.0 2004. 04

• HCD-CP555 is the Amplifier, CD player, tape deck and tuner section in CMT-CP555.

• HCD-NXM1 is the Amplifier, CD player, tape deck and tuner section in MHC-NXM1.

Photo : HCD-CP555

Model Name Using Similar Mechanism NEW

CD CD Mechanism Type CDM81B-F1BD81A

Section Base Unit Name BU-F1BD81A

Optical Pick-up Name KSM-215DCP/C2NP

TAPE

Section

Model Name Using Similar Mechanism NEW

AEP Model

HCD-CP555/NXM1

UK Model

E Model

HCD-CP555

SPECIFICATIONS

Amplifier section AUDIO POWER SPECIFICATIONS

The following measured at AC 120 – 127/220 – 240 V, 50/60 Hz (Saudi Arabian model only) The following measured at AC 230 V, 50/60 Hz (European and Russian models only) The following measured at AC 120/220 – 240 V, 50/60 Hz (except for European, Russian and Saudi Arabian models)

DIN power output (rated): 55 + 55 watts

(6 ohms at 1 kHz, DIN)

Continuous RMS power output (reference):

75 + 75 watts

(6 ohms at 1 kHz, 10% THD) Inputs VIDEO/MD IN (phono jacks): Sensitivity 250/450 mV,impedance

47 kilohms Outputs DIGITAL (OPTICAL) OUT: Optical Wavelength: 660 nm PHONES (mini jack): accepts headphones with an

impedance of 8 ohms or more SPEAKER: Use only the supplied speakers

SS-CP555S

(HCD-CP555)

SS-NXM1

(HCD-NXM1)

CD player section

System Compact disc and digital audio system Laser Semiconductor laser

(λ=770 – 810 nm) Emission duration: continuous

Frequency response 2 Hz – 20 kHz (±0.5 dB)

Tape deck section

Recording system 4-track 2-channel stereo Frequency response 50 – 13,000 Hz (±3 dB), using Sony

TYPE I cassettes

– Continued on next page –

HCD-CP555

MICRO Hi-Fi COMPONENT SYSTEM

HCD-NXM1

MINI Hi-Fi COMPONENT SYSTEM

9-877-825-01

Sony Corporation

Home Audio Company Published by Sony Engineering Corporation

HCD-CP555/NXM1

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range Russian model: 65.0 – 74.0 MHz (10-kHz step)

(There is no stereo effect)

87.5 – 108.0 MHz (50-kHz step) Other models: 87.5 – 108.0 MHz (50-kHz step) Antenna FM lead antenna Antenna terminals 75 ohms unbalanced Intermediate frequency 10.7 MHz

AM tuner section

Tuning range Pan-American model: 530 – 1,710 kHz

(with the tuning interval set at 10 kHz) 531 – 1,710 kHz (with the tuning interval set at 9 kHz)

European, Russian and Saudi Arabian models:

531 – 1,602 kHz (with the tuning interval set at 9 kHz)

Other models: 531 – 1,602 kHz

(with the tuning interval set at 9 kHz) 530 – 1,710 kHz

(with the tuning interval set at 10 kHz) Antenna AM loop antenna Antenna terminals External antenna terminal Intermediate frequency 450 kHz

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.

Flexible Circuit Board Repairing

• Keep the temperature of 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.

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

This appliance is classified as a CLASS 1 LASER product. This label is located on the rear exterior.

General

Power requirements European and Russian models: 230 V AC, 50/60 Hz Saudi Arabian model: 120 – 127 V or 220 – 240 V AC,

50/60 Hz Adjustable with voltage selector

Other models: 120 V, 220 – 240 V AC, 50/60 Hz

Adjustable with voltage selector Power consumption European and Russian models: 110 watts

0.3 watts (in Power Saving mode) Other models: 115 watts Dimensions (w/h/d) incl. projecting parts and controls Amplifier/Tuner/Tape/CD section:

Approx. 230 x 292 x 355 mm Mass Amplifier/Tuner/Tape/CD section:

Approx. 6.5 kg Supplied accessories Remote Commander (1)

Size AA (R6) batteries (2)

AM loop antenna (1)

FM lead antenna (1)

Speaker pads (8)

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.

1. SERVICING NOTES ................................................ 4

2. GENERAL

Location of Controls ........................................................ 5

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 7

3-2. Case ................................................................................. 8

3-3. Main Board ...................................................................... 8

3-4. Back Panel ....................................................................... 9

3-5. CD Mechansm Deck (CDM81B-F1BD81A),

Front Panel ...................................................................... 9

3-6. Front Amp Board ............................................................. 10

3-7. Tape Mechanism Deck .................................................... 10

3-8. Panel Board ..................................................................... 11

3-9. Tray.................................................................................. 11

3-10. M761 (LD/ST Motor), M762 (BU U/D Motor) .............. 12

3-11. Base Unit (BU-F1BD81A) .............................................. 12

3-12. BD Board ......................................................................... 13

HCD-CP555/NXM1

4. TEST MODE .............................................................. 14

5. MECHANICAL ADJUSTMENTS ....................... 17

6. ELECTRICAL ADJUSTMENTS

Deck section .................................................................... 17

CD Section ...................................................................... 18

7. DIAGRAMS

7-1. Circuit Board Location .................................................... 21

7-2. Block Diagram – CD Servo Section –............................ 22

7-3. Block Diagram – Tuner/Tape Deck Section – ................ 23

7-4. Block Diagram – Main Section – ................................... 24

7-5. Block Diagram – Front Amp Section – .......................... 25

7-6. Printed Wiring Board – BD Board – .............................. 26

7-7. Schematic Diagram – BD Board – ................................. 27

7-8. Printed Wiring Board – CD Mechanism Board – ........... 28

7-9. Schematic Diagram – CD Mechanism Board – ............. 29

7-10. Printed Wiring Boards – Main Board – .......................... 30

7-11. Schematic Diagram – Main Board (1/3) – ..................... 31

7-12. Schematic Diagram – Main Board (2/3) – ..................... 32

7-13. Schematic Diagram – Main Board (3/3) – ..................... 33

7-14. Printed Wiring Boards – Panel Board – ......................... 34

7-15. Schematic Diagram – Panel Board – ............................... 35

7-16. Printed Wiring Board – Disc SW, Vol, HP Board – ....... 36

7-17. Schematic Diagram – Disc SW, Vol, HP Board – .......... 37

7-18. Printed Wiring Board – Front Amp Board – .................. 38

7-19. Schematic Diagram – Front Amp Board – ..................... 39

7-20. IC Block Diagram ........................................................... 40

7-21. IC Pin Function Description ............................................ 41

8. EXPLODED VIEWS

8-1. Case, Rear Panel Section ................................................. 46

8-2. Front Panel Section ......................................................... 47

8-3. Chassis Section ................................................................ 48

8-4. CD Mechanism Deck Section-1

(CDM81B-F1BD81A) .................................................... 49

8-5. CD Mechanism Deck Section-2

(CDM81B-F1BD81A) .................................................... 50

8-6. CD Mechanism Deck Section-3

(CDM81B-F1BD81A) .................................................... 51

9. ELECTRICAL PARTS LIST ................................ 52

HCD-CP555/NXM1

SECTION 1

SERVICING NOTES

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

The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH OPERATION CHECK

Carry out the “S curve check” in “CD section adjustment” and check that the S curve waveform is output several times.

•Abbreviation E3 : 240 V AC Area in E model E51 : Chilean and Peruvian model EA : Saudi Arabia model RU : Russian model

• MODEL IDENTIFICATION – Back Panel –

PAR T No.

MODEL PART No.

AEP, UK models 4-252-542-0[] RU model 4-252-542-1[] E3 model 4-252-542-2[] E51 model 4-252-542-3[] EA model 4-252-542-5[]

• SERVICE POSITION FOR TAPE MECHANISM DECK

CN301

Jig (J-2501-270-A)

CN302

Jig (J-2501-271-A)

tape mechanism deck

LOCATING THE CONTROLS

12 3 4

List of button locations and reference pages

Main u nit

SECTION 2

GENERAL

HCD-CP555/NXM1

This section is extracted from instruction manual.

ALPHABETICAL ORDER

A – O P – Z

ALBUM +/– qa BASS control w; CD wk CD SYNC ws Deck A qj Deck B qg DIMMER wd DISC 1 – 5 3 Disc tray 9 DISPLAY wf Display window 4 DSGX qs

PHONES jack qh Remote sensor 2 TAPE A/B wh TREBLE control ql TUNER/BAND wj TUNING +/– 0 VIDEO/MD wg VOLUME control qd

BUTTON DESCRIPTIONS

?/1 (power) 1 nN (play) 5 X (pause) 6 x (stop) 7 CD Z (eject) 8 .m/M> (rewind/fast

forward, go back/go forward)

TAPE Z B(eject) qf A TAPE Z (eject) qk

z START wa

wk wj

wh wg

wf wd ws wa w;

ql qk

5 6 7 8 9

0 qa

qs qd qf

HCD-CP555/NXM1

Remote co ntrol

This section is extracted from instruction manual.

ALPHABETICAL ORDER

A – E

ALBUM – qd ALBUM + qa CD qk CLEAR qg CLOCK/TIMER SELECT 2 CLOCK/TIMER SET 3 DISC SKIP 0 DISPLAY wa ENTER 9 EQ qf

ws wa

F – Z

FM MODE 4 FUNCTION 6 PLAY MODE w; REPEAT 4 SLEEP ws TAPE qj TUNER BAND 5 TUNER MEMORY ql TUNING MODE w; VOLUME +/– qs

BUTTON DESCRIPTIONS

?/1 (power) 1 m/M (rewind/fast forward)

N (play) 8 X (pause) 8 x (stop) 8 ./> (go back/go forward)

–/+ (tuning) qh

1 2

w; ql qk qj

qg qf

3 4 5 6

7 8

9 q;

qa qs

• This set can be disassembled in the order shown below.

3-1. DISASSEMBLY FLOW

SET

3-2.CASE

(Page 8)

3-3.MAIN BOARD

(Page 8)

HCD-CP555/NXM1

SECTION 3

DISASSEMBLY

3-4.BACK PANEL

(Page 9)

3-5.CD MECHANISM DECK,

FRONT PANEL

(Page 9)

3-7.TAPE MECHANISM DECK

(Page 10)

3-8.PANEL BOARD

(Page 11)

3-6.FRONT AMP BOARD

(Page 10)

3-9.TRAY

(Page 12)

3-10.M761 (LD/STMOTOR),

M762 (BU U/D MOTOR)

(Page 14)

3-11.BASE UNIT

(Page 13)

3-12.BD BOARD

(Page 13)

HCD-CP555/NXM1

)

Note: Follow the disassembly procedure in the numerical order given.

3-2. CASE

three

(CASE 3 TP2)

screws

CASE

two

screws

(+BVTP 3X8)

screw

(+BVTP 3X8)

three

(CASE 3 TP2)

screws

two

screws

(+BVTP 3X8

3-3. MAIN BOARD

CNP109

two

screws

(+BVTP 3X8)

connector

(CN301)

connector

(CN302)

MAIN board

CNP303

CNP371

CNP110

(CN102)

(CN103)

connector

CNP372

(CN304)

connector

(CN401)

CNP112

connector

CNP204

connector

(CN101)

two

screws

(+BVTP 3X8)

3-4. BACK PANEL

)

back panel section

connector

(CN506)

HCD-CP555/NXM1

three

(+BVTP 3

screws

two

screws

(+BVTP 3

screw

(+BVTP 3

3-5. CD MECHANISM DECK (CDM81B-F1BD81A), FRONT PANEL

two

screws

(+BVTP 3X10)

bracket

screw

(+BVTP 3X8)

screw

(+BVTP 3X8)

CNP701

CNP201

screw

(+BVTP 3X8)

two

(+BVTP 3X8)

screw

(+BVTP 3X8)

CD mechanism deck (CDM81B-F1BD81A

screws

connector

(CN505)

front panel section

two

screws

(+BVTP 3X8)

HCD-CP555/NXM1

)

3-6. FRONT AMP BOARD

bracket

FRONT AMP board

(+BVTP 3

two

screws

(+BVTP 3

two

screws

(+BV (B3

)

screw

)

bracket

two

screws

)

(+BVTP 3

two

(+BV (B3

connector

(CN502)

)

screw

)

(+BVTP 3

)

3-7. TAPE MECHANISM DECK

two

screws

(+BVTP 2.6X8)

tape mechanism dec

two

screws

(+P 2.6X3)

HCD-CP555/NXM1

3-8. PANEL BOARD

screw

(+BVTP 2.6X8)

three

(+BVTP 2.6X8)

screws

screw

(+BVTP 2.6X8)

bracket (main)

PANEL board

screw

(+BVTP 2.6X8)

four

screws

(+BVTP 2.6X8)

3-9. TRAY

two

screws

(+BTP 2.6X8)

tray

bracket

two

screws

(+BTP 2.6X8)

HCD-CP555/NXM1

3-10. M761 (LD/ST MOTOR), M762 (BU U/D MOTOR)

two

screws

(+BTP 2.6X8)

Remove soldering from the two points.

M762 (BU U/D MOTOR)

MOTOR board

Remove soldering from the two points.

M761 (LD/ST MOTOR)

3-11. BASE UNIT (BU-F1BD81A)

base unit (BU-F1BD81A)

two floating

(+PTPWH2.6)

screw

3-12. BD BOARD

)

HCD-CP555/NXM1

optical pick-up

(KSM-215DCP/C2NP)

insulator

coil spring

(insulator)

floating

(+PTPWH2.6)

screw

insulator

coil spring

(insulator)

floating

(+PTPWH2.6)

Remove the four solderings of motor.

screw

insulator

coil spring

(insulator)

floating

(+PTPWH2.6)

(insulator)

(+PTPWH2.6

CN101

BD board

screw

(+BVTP 2.6X8)

screw

insulator

coil spring

floating

scre

HCD-CP555/NXM1

SECTION 4

TEST MODE

[Change-over of AM Tuner Step between 9 kHz and 10 kHz]

•A step of AM channels can be changed over between 9 kHz and 10 kHz.

Procedure:

1. Press

button to turn the set ON.

?/1

2. Select the function “TUNER”, and press [TUNER/BAND]

button to select the BAND “AM”.

3. Press

4. Press x and

button to turn the set OFF.

?/1

buttons simultaneously, and the display

?/1

of fluorescent indicator tube changes to “AM 9 kHz step” or “AM 10 kHz step”, and thus the channel step is changed over.

[Cold Reset]

• The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the customer.

Procedure:

Press three buttons x , [DIMMER] ,and

?/1

simultaneously.

[Switching MD/VIDEO Functions]

Procedure:

1. Press the

2. Press the

button to turn the set ON.

?/1

button while holding the VIDEO/MD button

?/1

depressed to toggle between “MD” and “VIDEO.” The selected mode is displayed.

[Error code indication]

Procedure:

1. Press the

button to turn the set ON.

?/1

2. Select the “CD” function.

3. Press the x , X , and [DISPLAY] buttons simultaneously.

4. The error code is displayed.

5. Press the [TUNING +] button to display the next error code. Press the [TUNING -] button to display the previous error code.

[Aging Mode]

This mode can be used for operation check CD section and Tape deck section.

• If an error occurred: The aging operation stops and is displayed status.

• If no error occurs: The aging operation continues repeatedly

1) Error display

Disc error

Display Error

E00D01022 Focus error (No disc)

E00D02022 Sub Q error (Focus is good)

E00D02023 TOC reading error

E00D02014 Access error (Unable within regular time)

Mechanism error

Display Error

E00M__E_0 Error during opening tray

E00M__C_2 EX-CHANGE disc error

E00M__D_0 Error during closing tray

E00M__F_3 EX-OPEN error

E00M__D_5 EX-CLOSE error

E00M__C_2 Chuck-up error

E00M__C_3 Unchucking error

2. Aging mode in Tape Deck section

Procedure:

1. Load the tapes into the decks A and B respectively.

2. Press

button on the set ON

?/1

3. Select the function “TAPE A”

4. Press three buttons x , X , and [TAPE A/B]

simultaneously, and aging mode is started.

5. To exit from the aging mode perform [Cold Reset].

• In the aging mode ,the program is executed in the following sequence.

Step Operation Display

1 Rewind the TAPE A TAPE A AG-1

2 Rewind the TAPE B TAPE B AG-1

3 Play the TAPE A (t) (2 minute) TAPE A AG-2

4 F•F. (AMS) the TAPE A TAPE A AG-3

5 Play the TAPE A (T) (2 minute) TAPE A AG-4

6 Rewind the TAPE A TAPE A AG-5

7 Play the TAPE B (t) (2 minute) TAPE B AG-2

8 F•F.(AMS) the TAPE B TAPE B AG-3

9 Play the TAPE B (T) (2 minute) TAPE B AG-4

10 Rewind the TAPE B TAPE B AG-5

1. Aging mode in CD section

Procedure:

1. Press

button on the set ON

?/1

2. Select the function “CD”

3. Press three buttons x , X , and [DISC 3] simultaneously.

The “Aging in” display and aging mode is set.

4. Press [DISC 1] button, starts aging mode of all trays check.

5. Press [DISC 2] button ,starts measurement loading time.

6. To exit from the aging mode perform [Cold Reset].

HCD-CP555/NXM1

[GC Test Mode]

• All fluorecent segments and LEDs are tested.

• Microprocessor virsion.

• Keyboard check.

• Display check.

Procedure:

1. To enter the test mode, press the three buttons x , X and

[TUNER/BAND] simultaneously.

2. All segments and LEDs (without STANDBY LED) are turned on.

3. Press the [TUNING -] button to increment the microprocessor software version.

4. Press the [TUNING +] button to change the indication for the microprocessor software version.

3. Press the b B button to set the check mode for the entries (KEY, JOG, etc.).

4. Press the X button to display the current VACS level.

7. Press the x button to enter the mode to check the display. If you press this button repeatedly, the display will change sequentially as the button is pressed.

8. Press the x , X and [TUNER/BAND] buttons simultaneously to set the standby mode.

[CD Service Mode]

• This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the pick-up.

Procedure:

1. Press

button to turn the set ON.

?/1

2. Select the function “CD”.

3. To enter the test mode, press three buttons x , X , and [DISC

1] simultaneously.

4. The CD service mode is selected.The message ‘‘CD SERVICE MODE’’ is displayed.

5. While holding the [TUNING -] button depressed, to move the sled to the inside. “SLED IN” is displayed. While holding the [TUNING +] button depressed, to move the sled to the outside. “SLED OUT” is displayed.

6. Press the [CD SYNC] button so that “LD ON” and “LD OFF” are displayed to switch between Laser ON/OFF.

7. To exit from this mode, perform as follows:

1) Move the pick-up to the most inside track.

2) Press

Note: • Always move the pick-up to most inside track when exiting from

this mode. Otherwise, a disc will not be unloaded.

• Do not run the sled motor excessively, otherwise the gear can be chipped.

button to turn the set OFF.

?/1

[MC Test Mode] (Amplifier SECTION)

• This mode is used to test the function of the amplifier section.

Procedure:

1. Press

2. To enter the test mode, press the three buttons x , X and

button to turn the set ON.

?/1

z START simultaneously.

3. Turn [VOLUME] knob to counter-clockwise, the function of

the equalizer is set to “MIN”.

4. Turn [VOLUME] knob to clockwise, the function of the

equalizer is set to “MAX”.

5. Whenever turn [BASS] knob to clockwise, the display switches

as follows.

“TONE MAX” t“TONE MIN” t“TONE FLAT”

6. To exit from this mode, press

button to turn the set

?/1

OFF.

[MC Test Mode] (Tape section)

• This mode is used to test the functions of the Tape Procedure.

Procedure:

1. Press

2. To enter the test mode, press the three buttons x , X and z/START simultaneously.

button to turn the set ON.

?/1

3. While holding the [DIMMER] button depressed, turn the ALC ON.

4. Press the z/START button to start REC (recording).

5. While recording, press the [TUNING +] button to perform automatic rewind and automatic playback (for FF version). Also, press the [TUNING -] button to perform automatic rewind and automatic playback (for FR version).

6. Select the function “TAPE A” or “TAPE B”

7. Press the [CD SYNC] button while “TAPE A” or “TAPE B” is selected, to perform AMS check. “EDG[ ]” is displayed. A number appears inside[ ].

8. To exit from this mode, press

button to turn the set

?/1

OFF.

[CD Ship Mode (LOCK) ]

• This mode moves the pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair.

Procedure:

1. Press

button to turn the set ON.

?/1

2. Select the function “CD”.

3. Press x button and [CD] button simultaneously.

4. The “STANDBY” display blinks instantaneously, and the CD ship mode is set.

5. To fluorescent indicator tube displays ‘‘LOCK’’.

[CD Ship (LOCK) & COLD RESET MODE]

Procedure:

1. Press

button to turn the set ON.

?/1

2. Select the function “CD”.

Press three buttons x , X and VIDEO/MD simultaneously.

4. The “STANDBY” display blinks instantaneously and CD ship mode is set.

5. To fluorescent indicator tube displays “LOCK” and the set is reset.

[CD power -manage function]

Procedure:

1. Press

button to the set ON

?/1

2. Select the function “CD”.

3. Press

4. Press x and

button to turn the set OFF.

?/1

buttons simultaneously ,and the display

?/1

of fluorescent indicator tube changes “CD POWER OFF” or “CD POWER ON”.

5. Press

button to turn the set OFF.

?/1

HCD-CP555/NXM1

[DISC Tray Lock]

Procedure:

1. Press

2. Select the function “CD”.

3. Press x and CD Z buttons simultaneously for 5 seconds.

And the displays of fluorescent indicator tube changes to “LOCKED” or “UNIOCKED”.

4. Press

[CD Repeat 5 Times Limit Release Mode]

Procedure:

1. Press

2. Select the function “CD”.

3. Press three buttons x , X and [CD SYNC] simultaneously.

4. The message “LIMIT OFF” is displayed.

5. Press

[AMP TEST MODE]

Procedure:

1. Press

2. To enter the test mode, press three buttons x , X and [DSGX]

simultaneously.

3. Display will changes ‘‘VACS ON’’ to ‘‘VACS OFF’’.

4. Press

button to the set ON.

?/1

button to turn the set OFF.

?/1

button to turn the set ON.

?/1

button the set OFF.

?/1

button to turn the set ON.

?/1

button to turn the set OFF.

?/1

HCD-CP555/NXM1

SECTION 5

MECHANICAL ADJUSTMENTS

Precaution

1. Clean the following parts with a denatured alcohol-moistened swab:

record/playback heads pinch rollers erase head rubber belts capstan idlers

2. Demagnetize the record/playback head with a head

demagnetizer.

3. Do not use a magnetized screwdriver for the adjustments.

4. After the adjustments, apply suitable locking compound to

the parts adjusted.

5. The adjustments should be performed with the rated power

supply voltage unless otherwise noted.

Torque Measurement

Mode Torque meter Meter reading

3.06 N • m to 6.96 N • m

FWD CQ-102C 31 to 71 g • cm

(0.43 – 0.98 oz • inch)

FWD

back tension

REV CQ-102RC 31 to 71 g • cm

REV

back tension

FF/REW CQ-201B 71 to 143 g • cm

FWD tension CQ-403A 100 g or more

REV tension CQ-403R 100 g or more

CQ-102C 2 to 6 g • cm

CQ-102RC 2 to 6 g • cm

0.19 N • m to 0.58 N • m

(0.02 – 0.08 oz • inch)

3.06 N • m to 6.96 N • m

(0.43 – 0.98 oz • inch)

0.19 N • m to 0.58 N • m

(0.02 – 0.08 oz • inch)

6.96 N • m to 14.02 N • m

(0.98 – 1.99 oz • inch)

9.80 N • m

(3.53 oz or more)

9.80 N • m

(3.53 oz or more)

SECTION 6

ELECTRICAL ADJUSTMENTS

DECK SECTION

1. Demagnetize the record/playback head with a head demagnetizer.

2. Do not use a magnetized screwdriver for the adjustments.

3. After the adjustments, apply suitable locking compound to the parts adjust.

4. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

5. The adjustments should be performed in the order given in this service manual. (As a general rule, playback circuit adjustment should be completed before performing recording circuit adjustment.)

6. The adjustments should be performed for both L-CH and RCH.

7. Switches and controls should be set as follows unless otherwise specified.

•Test Tape

Tape Signal Used for

P-4-A100 10 kHz, –10 dB Azimuth Adjustment

RECORD/PLAYBACK HEAD AZIMUTH ADJUST-MENT

DECK A DECK B

Note: Perform this adjustments for both decks

Procedure:

1. Mode: Playback

test tape P-4-A100 (10 kHz, –10 dB)

0 dB=0.775 V

MAIN board CN304 Pin

(L-CH)

(R-CH)

set

MAIN board CN304

(GND)

level meter

+ –

HCD-CP555/NXM1

2. Turn the adjustment screw and check output peaks. If the peaks do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 1dB of peak.

Output level

within 1dB

L-CH peak

R-CH peak

within 1dB

Screw position

L-CH peak

Screw position

R-CH peak

3. Mode: Playback

test tape P-4-A100 (10 kHz, –10 dB)

L-CH

MAIN board CN301 set

R-CH

waveform of oscilloscope

oscilloscop

CD SECTION

Note:

1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10MW impedance.

4. Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks.

S-curve Check

Connection:

oscilloscope

CD board

TPO102 (FE1)

TP117 (VC)

Procedure:

1. Connect an oscilloscope to test point TPO102 (FE1) and TP 117(VC) on the CD board.

2. Turn the power on.

3. Put the disc (YEDS-18) in and turned power switch on again and actuate the focus search. (actuate the focus search when disc table is moving in and out)

4. Check the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 2.4 ± 1 Vp-p.

+ –

in phase 45°90°135°180

good

wrong

4. After the adjustments, apply suitable locking compound to the pats adjusted.

Adjustment Location: Playback Head (Deck A).

Record/Playback/Erase Head (Deck B).

S-curve waveform

symmetry

within 2.4

Note:

•Try to measure several times to make sure than the ratio of A : B or B : A is more than 10 : 7.

•Take sweep time as long as possible and light up the brightness to obtain best waveform.

Checking Location: CD board (SIDE B)

(See page 20.)

1 Vp-p

forward

reverse

HCD-CP555/NXM1

RFAC Level Check

Connection:

oscilloscope

CD board

TP124 (RFAC)

TP117 (VC)

+ –

Procedure:

1. Connect an oscilloscope to test point TP124 (RFAC) and TP 117(VC) on the CD board.

2. Turn the power on.

3. Put the disc (YEDS-18) in to playback the number five track.

4. Confirm that oscilloscope waveform is clear and check RFAC signal level is correct or not.

Note: A clear RFAC signal waveform means that the shape “◊” can be

RFAC signal waveform

clearly distinguished at the center of the waveform.

VOLT/DIV: 200 mV TIME/DIV: 500 ns

level: 0.9 ± 0.4 Vp-p

E-F Balance Check

Connection:

oscilloscope

CD board

TPO103 (TE1)

TP117 (VC)

+ –

Procedure:

1. Connect an oscilloscpe to test point TPO103 (TE1) and TP117 (VC) on the CD board.

2. Turn the power on.

3. Select the function “CD”.

4. Press three buttons of [ENTER], M , and [SURRUUND MODE] simultaneously to set the CD service mode.

5. Put the disc (YEDS-18) in to playback the number five track.

6. Press the . button. The message “TRAVERSE” is displayed. (The tracking servo and the sledding servo are turned OFF)

7. Check the level B of the oscilliscope's waveform and the A (DC voltage) of the center of the Traverse waveform. Confirm the following : A/B x 100 = less than ± 22%

Tr averse Waveform

Center of the waveform

Checking Location: CD board (SIDE B)

(See page 20.)

level: 1.0 ± 0.5 Vp-p

8. Press the . button. The message “TRAVERSE” is

A (DC

voltage)

displayed. (The tracking servo and sledding servo are turned ON) Confirm the C (DC voltage) is almost equal to the A (DC voltage) is step 5.

9. To exit from this mode, perform as follows.

1) Move the optical pick-up to the most inside track.

2) Press three buttons of x , [CLEAR], and [DISPLAY]

simultaneously. (cold reset)

Notes:

• Always move the optical pick-up to most inside track

when exiting from this mode. Otherwise, a disc will not be unloaded.

• Do not run the sled motor excessively, otherwise the gear

can be chipped.

Tr averse Waveform

Tr acking servo

Sled servo

OFF

Tr acking servo

Sled servo

Checking Location: CD board (SIDE B) (See page 20.)

C (DC voltage)

HCD-CP555/NXM1

Checking Location:

– CD BOARD (SIDE B) –

TP117 (VC)

JPO103 (TE1)

JPO102 (FE1)

IC101

TP124 (RFAC)

+ 44 hidden pages

Sony HCD-NXM1 Service Manual

SPECIFICATIONS

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

3-1. DISASSEMBLY FLOW

DISASSEMBLY

3-2. CASE

3-3. MAIN BOARD

3-4. BACK PANEL

3-5. CD MECHANISM DECK (CDM81B-F1BD81A), FRONT PANEL

3-6. FRONT AMP BOARD

3-7. TAPE MECHANISM DECK

3-8. PANEL BOARD

3-9. TRAY

3-10. M761 (LD/ST MOTOR), M762 (BU U/D MOTOR)

3-11. BASE UNIT (BU-F1BD81A)

3-12. BD BOARD

TEST MODE

MECHANICAL ADJUSTMENTS

ELECTRICAL ADJUSTMENTS