Sony HCDDX-155 Service manual

HCD-DX155/DX255

SERVICE MANUAL

Ver. 1.0 2006.02

Photo : HCD-DX255

HCD-DX155/DX255 are the amplifier, DVD/CD and tuner section in DAV-DX155/DX255.

This system incorporates with Dolby*1 Digital and Dolby Pro Logic (II) adaptive matrix surround decoder and the DTS*2 Digital Surround System. *1 Manufactured under license from Dolby Laboratories.

“Dolby,” “Pro Logic,” and the double-D symbol are trademarks of Dolby Laboratories.

*2 Manufactured under license from Digital Theater Systems, Inc.

“DTS” and “DTS Digital Surround” are trademarks of Digital Theater Systems, Inc.

US Model

Canadian Model

HCD-DX155/DX255

E Model

Australian Model

HCD-DX155

Model Name Using Similar Mechanism HCD-DX150 Mechanism T ype CDM81C-DVBU101 Optical Pick-up Name

KHM-310CAB

AUDIO POWER SPECIFICATIONS for the US model

DX155

POWER OUTPUT AND TOTAL HARMONIC DISTORTION (FTC Output Power): FL/FR/LS/RS/C: 84 W/ch

DX255

POWER OUTPUT AND TOTAL HARMONIC DISTORTION (FTC Output Power): FL/FR/LS/RS/C: 84 W/ch

Amplifier section

DX155

US models: Surround mode (reference)

3 ohm at 170 - 20,000 Hz,

0.7 % THD SW: 80 W 3 ohm at 40 170 Hz, 0.7 % THD

3 ohm at 170 - 20,000 Hz,

0.7 % THD SW: 160 W 1.5 ohm at 40 170 Hz, 0.7 % THD

RMS output power, 10 % THD Front: 142 W + 142 W (with SS-TS52)

SPECIFICATIONS

Center*: 142 W (with SS-CT51) Surround*: 142 W + 142 W (with SS-TS51) Subwoofer*: 140 W

Mexican and other models: Stereo mode (rated) 108 W + 108 W (3 ohms at

Surround mode (reference)

Latin American models: Stereo mode (rated) 100 W + 100 W (3 ohms at

Surround mode (reference)

(with SS-WS52)

1 kHz, 1 % THD) RMS output power, 10 % THD Front: 142 W + 142 W (with SS-TS52)

Center*: 142 W (with SS-CT51) Surround*: 142 W + 142 W (with SS-TS51) Subwoofer*: 140 W (with SS-WS52)

1 kHz, 1 % THD) RMS output power, 10 % THD

DX255

US models: Surround mode (reference)

— Continued on next page —

Front: 133 W + 133 W (with SS-TS52) Center*: 133 W (with SS-CT51) Surround*: 133 W + 133 W (with SS-TS51) Subwoofer*: 135 W (with SS-WS52)

RMS output power, 10 % THD Front: 143 W + 143 W (with SS-TS52) Center*: 143 W (with SS-CT51) Surround*: 143 W + 143 W (with SS-TS51) Subwoofer*: 285 W (with SS-WS52B)

9-887-098-01

SUPER AUDIO CD/DVD RECEIVER

Sony Corporation

Home Audio Division Published by Sony Techno Create Corporation

HCD-DX155/DX255

Other models: Stereo mode (rated) 108 W + 108 W (3 ohms at

1 kHz, 1 % THD)

Surround mode (reference)

RMS output power, 10 % THD Front: 143 W + 143 W (with SS-TS52) Center*: 143 W (with SS-CT51) Surround*: 143 W + 143 W (with SS-TS51) Subwoofer*: 285 W (with SS-WS52B)

*Depending on the sound f ield settings and the source,

there may be no sound output.

Inputs TV/VCR (AUDIO IN) Sensitivity: 450/250 mV AUDIO IN/MIC Sensitivity: 250/125 mV Outputs (Analog) Phones Accepts low-and high-

impedance headphones.

DVD system

Laser Semiconductor laser

(DVD: λ = 650 nm) (CD: λ = 790 nm) Emission duration:

continuous Signal format system North American, Latin, and Mexican models:

NTSC Other models: NTSC/PAL

Tuner section

System PLL quartz-locked digital

synthesizer system FM tuner section Tuning range North American models: 87.5 – 108.0 MHz

(100 kHz step) Other models: 87.5 – 108.0 MHz

(50 kHz step) Antenna (aerial) FM wire antenna (aerial) Antenna (aerial) terminals 75 ohms, unbalanced Intermediate frequency 10.7 MHz AM tuner section Tuning range Middle Eastern models: 531-1,602 kHz (with the

interval set at 9 kHz) Asian models: 531-1,602 kHz (with the

interval set at 9 kHz)

530-1,710 kHz (with the

interval set at 10 kHz) North American and Latin American models:

530-1,710 kHz (with the

interval set at 10 kHz)

531-1,710 kHz (with the

interval set at 9 kHz) Antenna (aerial) AM loop antenna (aerial) Intermediate frequency 450 kHz

Video section

Outputs V

IDEO: 1 Vp-p 75 ohms S VIDEO: Y: 1 Vp-p 75 ohms C: 0.286 Vp-p 75 ohms COMPONENT: Y: 1 Vp-p 75 ohms

PB/CB, PR/CR: 0.7 Vp-p 75 ohms

General

Power requirements North American and Mexican models:

120 V AC, 60 Hz Latin American models: 110 – 240 V AC, 50/60 Hz Other models: 220 – 240 V AC, 50/60 Hz Power consumption On: 140 W (Latin

American models of

DX155), 150 W

(Mexican and other models

of DX155), 160 W (DX255)

Standby: 0.3 W (at the

Power Saving mode) Dimensions (approx.) 430 × 86 × 418 mm

(17 × 3

/2 × 16 3/4 inches) (w/h/d) incl. projecting parts

Mass (approx.) 5.0 kg (11 lb 1 oz)

Design and specifications are subject to change without notice.

MODEL IDENTIFICATION – Rear Panel –

SPEAKER

FRONT R FRONT L SUR R SUR LCENTER WOOFER

Model Part No.

DX155 : US model 2-661-240-0[] DX255 : US model 2-661-240-1[] DX155 : SP model 2-661-240-2[] DX155 : MX model 2-661-240-3[] DX155 : CND model 2-661-240-4[] DX255 : CND model 2-661-240-5[] DX155 : AUS model 2-661-240-6[] DX155 : E3 model 2-661-240-7[]

•Abbreviation AUS: Australian model CND : Canadian model E3 : 240V AC area in E model MX : Mexican model SP : Singapore model

MONITOR OUT

VIDEO

S VIDEO (DVD ONLY)

COMPONENT VIDEO OUT

YPB/CBPR/C

(DVD ONLY)

ANTENNA

TV/VCR

COAXIAL

RLAUDIO IN

Parts No.

HCD-DX155/DX255

SAFETY CHECK-OUT

After correcting the original service problem, perform the following safety check before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.

LEAKAGE TEST

The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes.). Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA WT -540A. Follow the manufactur ers’ instructions to use these instruments.

2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC v oltmeter. The “limit” indication is 0.75 V, so analog meters must hav e an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A)

To Exposed Metal Parts on Set

Laser component in this product is capable of emitting radiation exceeding the limit for Class 1.

This appliance is classified as a CLASS 1 LASER product. This marking is located on the bottom exterior.

CAUTION

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

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 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.

0.15 µF

1.5 k

Ω

Earth Ground

voltmete (0.75 V)

Fig. A. Using an AC voltmeter to check AC leakage.

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.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 °C higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350 °C. Caution: The printed pattern (copper foil) may peel away if

the heated tip is applied for too long, so be careful!

• Strong viscosity Unleaded solder is more viscou-s (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc.

• Usable with ordinary solder It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder.

ATTENTION AU COMPOSANT AYANT RAPPORT

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

À LA SÉCURITÉ!

HCD-DX155/DX255

1. SERVICING NOTE ................................................... 5

2. GENERAL ................................................................... 8

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 11

3-2. Case, Front Panel Assy .................................................... 12

3-3. FL Board, SW Board....................................................... 13

3-4. JACK Board, LED Board ................................................ 13

3-5. I/O Board, Tuner.............................................................. 14

3-6. SPEAKER Board, D.C. Fan............................................ 14

3-7. MAIN Board .................................................................... 15

3-8. POWER Board ................................................................ 16

3-9. DVD Mechanism Deck (CDM81C-DVBU101) ............. 17

3-10. Tray.................................................................................. 18

3-11. MOTOR Board M761 (LD/ST Motor),

M762 (BU U/D Motor) ................................................... 18

3-12. Base Unit (DVBU101) .................................................... 19

3-13. Optical Pick-up (KHM-310CAB) ................................... 19

3-14. Gear (Sub Tray 1), Gear (Sub Tray 2) ............................. 20

3-15. Lever Assy ....................................................................... 20

3-16. Stocker Section ................................................................ 21

3-17. Cam (Stocker).................................................................. 21

3-18. Gear (Stocker 3) .............................................................. 22

3-19. Rotary Encoder (MD)...................................................... 22

3-20. Gear (BU1) ...................................................................... 23

4. TEST MODE ............................................................... 24

5. ELECTRICAL ADJUSTMENT ............................. 28

6. DIAGRAMS

6-1. Block Diagram – RF Section –....................................... 30

6-2. Block Diagram – AMP Section – ................................... 31

6-3. Block Diagram – AUDIO Section – ............................... 32

6-4. Block Diagram – VIDEO Section – ............................... 33

6-5. Block Diagram – POWER Section – .............................. 34

6-6. Printed Wiring Board – MAIN Board (Side A) –............ 35

6-7. Printed Wiring Board – MAIN Board (Side B) – ............ 36

6-8. Schematic Diagram – MAIN Board (1/10) – ................. 37

6-9. Schematic Diagram – MAIN Board (2/10) – ................. 38

6-10. Schematic Diagram – MAIN Board (3/10) – ................. 39

6-11. Schematic Diagram – MAIN Board (4/10) – ................. 40

6-12. Schematic Diagram – MAIN Board (5/10) – ................. 41

6-13. Schematic Diagram – MAIN Board (6/10) – ................. 42

6-14. Schematic Diagram – MAIN Board (7/10) – ................. 43

6-15. Schematic Diagram – MAIN Board (8/10) – ................. 44

6-16. Schematic Diagram – MAIN Board (9/10) – ................. 45

6-17. Schematic Diagram – MAIN Board (10/10) – ............... 46

6-18. Printed Wiring Board – I/O Board – ............................... 47

6-19. Schematic Diagram – I/O Board – ................................. 48

6-20. Printed Wiring Boards – PANEL Section –..................... 49

6-21. Schematic Diagram – PANEL Section –....................... 50

6-22. Printed Wiring Board – SPEAKER Board – ................... 51

6-23. Schematic Diagram – SPEAKER Board – .................... 51

6-24. Printed Wiring Boards – CD Mechanism Section –....... 52

6-25. Schematic Diagram – CD Mechanism Section – .......... 53

6-26. Printed Wiring Board – POWER Board – ....................... 54

6-27. Schematic Diagram – POWER Board –........................ 55

7. EXPLODED VIEWS

7-1. Overall Section ................................................................ 67

7-2. Front Panel Section ......................................................... 68

7-3. Chassis Section................................................................ 69

7-4. DVD Mechanism Deck Section-1

(CDM81C-DVBU101) .................................................... 70

7-5. DVD Mechanism Deck Section-2

(CDM81C-DVBU101) .................................................... 71

7-6. DVD Mechanism Deck Section-3

(CDM81C-DVBU101) .................................................... 72

7-7. Base Unit (DVBU101) .................................................... 73

8. ELECTRICAL PARTS LIST .................................. 74

SECTION 1

SERVICING NOTE

HCD-DX155/DX255

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.

DISC TRA Y LOCK

The disc tray lock function for the antitheft of an demonstration disc in the store is equipped.

Setting Procedure :

1. Press the ?/1 button to turn the set on.

2. Press the [FUNCTION] button to set DVD function.

3. Insert a disc.

4. Press the x stick and the A button simultaneously for five seconds.

5. The message “LOCKED” is displayed and the tray is locked.

Releasing Procedure :

1. Press the x stick and the A button simultaneously for five seconds again.

2. The message “UNLOCKED” is displayed and the tray is unlocked.

Note: When “LOCKED” is displayed, the tray lock is not released by

turning power on/off with the ?/1 button.

Note 1: Regarding the notification symbol “R”

Because the number of the operating buttons of this product are limited, some operations require use of the operating buttons of the remote commander, When a specific operation requires use of the operating buttons of the remote commander, “R” is added to the specific operating procedure in this manual. Example MENU/NO “R” The MENU/NO button of remote commander.

Note 2: Incorrect operations may be performed if the test mode ia not

entered properly. In this case, press the ?/1 button to turn the power off, and retry to enter the test mode.

Note 3: If the disc tray does not open and the message “LOCKED”

appears, press the x stick and the A button simultaneously for seconds or longer. Then remove your fingers from the above stick and the button. The message “UNLOCKED” appears for 2 seconds and the disc tray opens.

Self-diagnosis Function

(When letters/numbers appear in the display)

When the self-diagnosis function is activated to prevent the system from malfunctioning, a 5character service number (e.g., C 13 50) with a combination of a letter and 4 digits appears on the screen and the front panel display. In this case, check the following table.

C:13:50

First 3 characters of the service number

C 13 The disc is dirty.

C 31 The disc is not inserted correctly.

E XX (xx is a number)

When displaying the version number on the screen

When you turn on the system, the version number [VER.X.XX] (X is a number) may appear on the screen. Although this is not a malfunction and for Sony service use only, normal system operation will not be possible. Turn off the system, and then turn on the system again to operate.

Cause and/or corrective action

,Clean the disc with a soft cloth

,Restart the system, then re-insert

the disc correctly.

To prevent a malfunction, the system has performed the selfdiagnosis function.

,Contact your nearest Sony

dealer or local authorized Sony service facility and give the 5character service number.

Example: E 61 10

VER.X.XX

Note on MAIN board replacement

New part of EEP ROM (IC1103) on the MAIN board cannot be used. Therefore, if the mounted MAIN board (A-1151-985-A, etc.) is replaced,

exchange new EEP ROM (IC1103) with that used before the replacement.

HCD-DX155/DX255

HOW TO OPEN THE DISC TABLE WHEN POWER SWITCH TURNS OFF

tweezers

DVD lid

tape

Attach an adhesive tape on the DVD LID and draw it out.

gear

Insert tip of tweezers through the hole of bottom plate, and roate the gear in the counter-clockwise direction.

Discharge the charged electricity in capacitors to prevent electric shock as follow

When disassembling the machine, be sure to discharge the charged electricity in the following capacitors. Use a resistor of 800 ohms, 2 Watts for discharging the following capacitors.

POWER board C903 : 600V C932, C933, C939, CN902 : 30V

MAIN board CN3002 : 30 V

MAIN BOARD

POWER BOARD

BLACK

CN902

CN3002

C939

RED

Connect the specified resistor

between black and red leads

C933 C932

CN903

Fix the capacitors with adhesive agent as follows

Fixing the capacitors with adhesive agent is required by the safety regulation. Be sure to fix the capacitors with adhesive agent when part or circuit board is replaced.

POWER BOARD

HCD-DX155/DX255

Precaution on the connector processing of the POWER board.

When processing the connectors of the POWER board, be sure to refer to section “3-8. POWER BOARD” (page 16).

PRECAUTION WHEN INSTALLING A NEW OP UNIT / PRECAUTION BEFOR UNSOLDERING THE STATIC ELECTRICITY PREVENTION SOLDER BRIDGE

When installing a new OP unit, be sure to connect the flexible printed circuit board first of all before removing the static electricity prevention solder bridge by unsoldering. Remove the static electricity prevention solder bridge by unsoldering after the flexible printed circuit board has already been connected. (Do not remove nor unsolder the solder bridge as long as the OP unit is kept standalone.)

HCD-DX155/DX255

Front panel

SECTION 2

GENERAL

This section is extracted from instruction manual.

A "/1 (on/standby) (29) B Front panel display (92) C A (open/close) (29) D Disc operation (29) E FUNCTION (29) F (remote sensor) (9)

Rear panel

SPEAKER

FRONT R FRONT L SUR R SUR LCENTER WOOFER

A SPEAKER jacks (13) B MONITOR OUT (S VIDEO/VIDEO) jacks

(24)

C AM terminal (13)

G PHONES jack (29) H VOLUME control (29)

I AUDIO IN/A.CAL MIC jack (19, 31) J DISC 1-5 (29) K Disc tray (29)

ANTENNA

MONITOR OUT

VIDEO

S VIDEO

(DVD ONLY)

COMPONENT VIDEO OUT

YPB/CBPR/C

(DVD ONLY)

TV/VCR

RLAUDIO IN

COAXIAL

D COAXIAL FM 75Ω jack (13) E TV/VCR (AUDIO IN R/L) jacks (27) F COMPONENT VIDEO OUT jacks (24)

Front panel display

About the indications in the front panel display

HCD-DX155/DX255

A Lights up when the time information of

a title or chapter appears in the front panel display. (DVD only) (45)

B Lights up when the color system is set

to NTSC. (Asian, Australian, and Middle Eastern models only) (17)

C Lights up when a station is received.

(Radio only) (58)

D Monaural/Stereo effect (Radio only)

(58)

E Lights up when the sleep timer is set.

(62)

F Lights up when the music or movie

mode is selected. (Except for JPEG) (32)

G Playing status (DVD function only) H Lights up when the DYNAMIC BASS is

selected. (61)

I Lights up when CD is loaded. J Lights up when the system outputs

progressive signals (DVD function only). (25)

K Indicates the selected [SPEAKER

FORMATION]. (66)

L Current surround format (Except for

JPEG)

M Displays system’s status such as

chapter, title, or track number, time information, radio frequency, playing status, sound field, etc.

HCD-DX155/DX255

Remote control

ALPHABETICAL ORDER

A – O

AMP MENU wg (22, 31, 60, 62,

97) ANGLE 5 (47) AUDIO 4 (42) CLEAR ef (36, 58, 60, 71) D.TUNING wf (58) DISC SKIP qk (29) DISPLAY 3 (45, 59) DYNAMIC BASS wd (61) ENTER qd (19, 22, 31, 36, 57,

63) FUNCTION ws (25, 29, 31, 37,

57, 66) MENU wh (42, 57) MOVIE/MUSIC qj (32) MUTING 7 (29) Number buttons* qg (36, 58, 60,

63)

P – Z

PICTURE NAVI 6 (37, 60) PRESET +/– wk es (58) PROGRESSIVE eg (25) SLEEP ql (62) SOUND FIELD qh (33) SUBTITLE wf (48) THEATRE SYNC w; (61) TOP MENU qf (42) TUNING +/– 0 qs (57) TV e; (60) TV CH +/– wa (60) TV VOL +/– eh (60) TV/VIDEO 2 (60) VOLUME +/–* 8 (29, 58, 77)

BUTTON DESCRIPTIONS

[/1 (on/standby) 1 (19, 22, 29,

37, 58) TV [/1 (on/standby) ej (60) C/X/x/c qd(19, 22, 31, 36, 57,

63) REPLAY/

ADVANCE 9 (29)

./> es wk (29) m/M qs 0 (35)

/ SLOW qs 0 (35)

H (play)* ea (29, 37, 64)

STEP 9 (35)

x (stop) wl (30, 37, 63) X (pause) qa (30)

DISPLAY wj (20, 36, 63, 93)

O RETURN ed (37)

-/-- ef (60)

*The H, number 5, and

VOLUME + buttons have tactile dots. Use the tactile dots as references when operating the system.

HCD-DX155/DX255

3-3.FL BOARD, SW BOARD

(Page 13)

3-4.JACK BOARD, LED BOARD

(Page 13)

3-9.DVD MECHANISM DECK

(CDM81C-DVBU101)

(Page 17)

3-10.TRAY

(Page 18)

3-11.MOTOR BOARD

M761 (LD/ST MOTOR),

M762 (BU U/D MOTOR)

(Page 18)

3-12.BASE UNIT (DVBU101)

(Page 19)

3-13.OPTICAL PICK-UP

(KHM-310CAB)

(Page 19)

3-5.I/O BOARD, TUNER

(Page 14)

3-7.MAIN BOARD

(Page 15)

3-8.POWER BOARD

(Page 16)

3-6.SPEAKER BOARD,

D.C. FAN

(Page 14)

3-2.CASE, FRONT PANEL ASSY

(Page 12)

SET

3-14.GEAR (SUB TRAY 1),

GEAR (SUB TRAY 2)

(Page 20)

3-15.LEVER ASSY

(Page 20)

3-16.STOCKER SECTION

(Page 21)

3-19.ROTARY ENCODER (MD)

(Page 22)

3-17.CAM (STOCKER)

(Page 21)

3-20.GEAR (BU1)

(Page 23)

3-18.GEAR (STOCKER 3)

(Page 22)

SECTION 3

DISASSEMBLY

3-1. DISASSEMBLY FLOW

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

•The dotted square with arrow ( ) prompts you to move to the next job when all of the works within the dotted square ( ) are completed.

HCD-DX155/DX255

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

3-2. CASE, FRONT PANEL ASSY

two

screws

(CASE3 TP2)

ire (flat type)

23core (CN509)

sheet

case

five

screws

(+BVTP 3

two

(CASE3 TP2)

screws

loading panel

connector (CN312)

tweezers

claw

front panel assy

gear

of bottom plate, and roate the gear in the counter-clockwise direction.

connector (CN3001)

four screws (+BV3)

Insert tip of tweezers through the hole

claw

When re-assembling, leave 30 mm between harnesses A and B for safety.

harnesses A

30mm

harnesses B

DVD lid

tape

Attach an adhesive tape on the DVD LID and draw it out.

clamp

3-3. FL BOARD, SW BOARD

rivet

four

screws (+BVTP 2.6)

two

screws (+BVTP 2.6)

three

screws (+BVTP 2.6)

wire (flat type)

23core (CN801)

connector (CN811)

connector (CNP801)

connector (CN805)

six

claws

hold plate (FFC)

shield plate (FC)

SW board

FL board

button base

(power)

When reassembling, route the harness and flexible cable as shown in the illustration.

cap (power)

HCD-DX155/DX255

3-4. JACK BOARD, LED BOARD

knob (vol)

nut

button (play)

button (disk),

indicator (disk)

LED board

button (disk)

eight

five indicators (disk)

screws (+BVTP 2.6)

JACK board

screw (+BVTP 2.6)

HCD-DX155/DX255

3-5. I/O BOARD, TUNER

tuner

wire (flat type)

two screws

(+BVTT 3 × 6)

connector

(CN312)

wire (flat type)

9p(CN203)

I/O board

wire (flat type)

13p(CN311)

wire (flat type)

7p(CN202)

wire (flat type)

13p(CN201)

Open the

back panel .

3-6. SPEAKER BOARD, D.C. FAN

SPEAKER board

two

screws

(+BV3)

connector

(CN3000)

eight

D.C. fan

two

screws

(+BVTP 4

screws

two

(+BVTP 3 × 8)

(+BVTT 3

8) screws

(CN302)

connector

(CN303)

connector

(CN301)

connector

3-7. MAIN BOARD

wire (flat type) 13core (CN507)

connector (CN1201)

wire (flat type) 21core (CN508)

wire (flat type) 23core (CN509)

After twist the harness once, install the connector .

wire (flat type) 7core (CN1302)

wire (flat type) 24core (CN1101)

MAIN board

connector

(CN515)

wire (flat type) 13core (CN1301)

connector (CN303)

connector (CN302)

connector (CN301)

connector (CN3000)

HCD-DX155/DX255

connector (CN3001)

POWER board

eight screws (+BV 3)

MAIN board

HEATSINK A board

two

screws

(+BVTP 3

heatsink (AMP)

two screws (+BV 3)

10)

connector

(CN3002)

two clamps

(+BVTP 3

screw

two radiation

sheets

When re-assembling, leave 30 mm between harnesses A and B for safety.

harnesses A

HEATSINK B board

12)

heatsink (AMP)

harnesses B

30mm

clamp

When re-assembling, attaching the two heat radiation sheets on the IC MAIN board first, and then attach the heat sink (AMP).

radiation sheets

IC on the MAIN board

clamp

HCD-DX155/DX255

3-8. POWER BOARD

five screws (+BV 3)

POWER board

connector (CN515)

two screws (+BV 3)

shield (H/L)

After twist the harness once, install the connector .

MAIN board

POWER board

connector (CN3002)

connector (CN901)

When re-assembling, leave 30 mm between harnesses A and B for safety.

harnesses A

30mm

clamp

harnesses B

3-9. DVD MECHANISM DECK (CDM81C-DVBU101)

four

screws (+BV 3)

MD COVER

HCD-DX155/DX255

Remove the harness and flexible cable.

harness

flexible cable

wire (flat type) 21core (CN508)

four

screws

(+BVTP 3

(CDM81C-DVBU101)

10)

DVD mechanism deck

HCD-DX155/DX255

)

3-10. TRAY

two

screws

(+BTP 2.6

tray

bracket

two

screws

(+BTP 2.6

3-11. MOTOR BOARD M761 (LD/ST MOTOR), M762 (BU U/D MOTOR)

screw

(+BTP 2.6 × 8)

bracket

Remove soldering from the two points.

M762 (BU U/D MOTOR)

screw

(+BTP 2.6 × 8)

MOTOR board

Remove soldering from the two points.

M761 (LD/ST MOTOR)

3-12. BASE UNIT (DVBU101)

base unit (DVBU101)

floating

(+PTPWH2.6)

screw

HCD-DX155/DX255

two floating

(+PTPWH2.6)

screws

3-13. OPTICAL PICK-UP (KHM-310CAB)

insulator

screw

optical pick-up

(KHM-310CAB)

holder (310) assy

insulator

screw

two

screws

(+BTP 2.6

)

two

screws

(+BTP 2.6

)

HCD-DX155/DX255

3-14. GEAR (SUB TRAY 1), GEAR (SUB TRAY 2)

PRECAUTION DURING GEAR (SUB TRAY 1/2) INSTALLATION

Align the marks of the gears as shown in the illustration.

(sub tray 1)

gear (sub tray 2)

gear (sub tray 1)

gear (sub tray 2)

(+PTPWH 2.6

three gears

gear (sub tray 2)

five screws

gear (sub tray 2)

3-15. LEVER ASSY

Before re-assembling, align the lever (release) and the lever (sub tray) with the lever (mode) as shown in the illustration.

dowel dowel

lever (mode)

lever (release)

lever (sub tray)

When re-assembling, insert the lever (sub tray) between the bosses of the shutter (tray).

boss

lever (sub tray)

lever (release)

floating screw

(+PTPWH M2.6)

boss

shutter (tray)

lever (sub tray)

screw

(+PTPWH 2.6 × 8)

shutter (tray)

lever (mode)

cam (BU)

Before re-assembling, slide the cam (BU) in the direction of the arrow.

two screws

(+PTPWH 2.6 × 8)

two cams

(stocker)

cam

(stocker)

cam (stocker)

hole

gear (stocker 2)

gear (stocker 3)

tension spring (SW)

lever (SW)

screw

(+PTPWH 2.6 × 8)

screw

(+PTPWH 2.6 × 8)

hook

PRECAUTION DURING CAM (STOCKER) INSTALLATION

Before installing the cams (stocker), fix the gear (stocker 3) in the manner so that the hole of the gear (stocker 3) should be aligned with the hole of the chassis located beneath the gear (stocker 3). Be sure to install the cams (stocker) in such a way that the grooves of the cams (stocker) face the direction of the arrows.

3-16. STOCKER SECTION

Rotate the gear (SS3) in the

direction of the arrow.

HCD-DX155/DX255

stocker section

3-17. CAM (STOCKER)

HCD-DX155/DX255

3-18. GEAR (STOCKER 3)

screw

(+PTPWH 2.6

gear (stocker 3)

PRECAUTION DURING GEAR (STOCKER 3) INSTALLATION

Be sure to align the rib of the gear (stocker 3) with the groove of the rotary encoder.

groove

rib

rotary encoder (ST U/D encoder)

gear (stocker 3) (reverse-side)

3-19. ROTARY ENCODER (MD)

PRECAUTION DURING ROTARY ENCODER (MD) INSTALLATION

Slide the cam (BU) in the direction of the arrow so that the mark of the gear (BU1) can be seen. Engage the gears while aligning the mark of the gear (BU1) with the protruding part of the rotary encoder.

rotary encoder (MD)

protruding part

cam (BU)

mark

gear (BU1)

three screws

(+BTP 2.6

rotary encoder (MD)

3-20. GEAR (BU1)

PRECAUTION DURING GEAR (BU1) INSTALLATION

Before re-assembling, slide the cam (BU) in the direction of the arrow. Assemble the gear (BU1) in such a manner that the groove of the cam (BU) is aligned with the rib of the gear (BU1).

cam (BU)

screw

(+PTPWH 2.6

screw

(+PTPWH 2.6

HCD-DX155/DX255

belt (sub tray)

screw

(+PTPWH 2.6 × 8)

pulley (BU)

gear (BU2)

rib

gear (BU1)

groove

gear (BU1)

HCD-DX155/DX255

SECTION 4

TEST MODE

Note 1: Regarding the notification symbol “R”

Note 2: Incorrect operations may be performed if the test mode is

not entered properly. In this case, press the ?/1 button to turn the po wer of f, and retry to enter the test mode.

1. 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 customers.

Procedure:

1. Press the ?/1 button to turn the power on.

2. Press three buttons x , A and ?/1 simultaneously.

3. When this button is operated, display as “COLD RESET” for a while and all of the settings are reset.

2. Panel Test Mode

•This mode is used to check the software version, LCD, LED and keyboard.

2-1. DVD LED Test Mode

Procedure:

1. Press the ?/1 button to turn the power on.

2. Press three buttons X , . and A simultaneously.

3. When the display LED test mode is activated, all segments are turned on.

4. To exit from this mode, pull out the AC plug.

2-2. V ersion T est Mode

Procedure:

1. When the panal test mode is activ ated, press the . button and the message “DS*1D” is displayed, the version test mode is activated.

2. Whenever press the . button, the version is displayed in order of NA, MC, SYS, UI, DVD, CDMA, CDMB, ST, TA, DSP and TM.

3. Press the > button and the date of the softwafe production is displayed.

4. Press the > button again and the version is displayed.

5. To exit from this mode, press three buttons X , . and A simultaneously.

2-3. Key Test Mode

Procedure:

1. When the panel test mode is activ ated, press the H button, to select the key test mode.

2. To enter the KEY test mode, the fluorecent indicator displays “K0 VO”. Each time a button is pressed, “KEY” value increases. However, once a button is pressed, it is no longer taken into account. When all keys ar e pressed correctly , “K13 VO” is displayed.

3. To exit from this mode, press three buttons X , . and A simultaneously.

3. Disc Tray Lock

The disc tray lock function for the antitheft of an demonstration disc in the store is equipped.

Setting Procedure :

1. Press the ?/1 button to turn the set on.

2. Press the FUNCTION button to set DVD function.

3. Insert a disc.

4. Press the x button and the A button simultaneously for five seconds.

5. The message “LOCKED” is displayed and the tray is locked.

Releasing Procedure :

1. Press the x button and the A button simultaneously for five seconds. again.

2. The message “UNLOCKED” is displayed and the tray is unlocked.

Note: When “LOCKED” is displayed, the slot lock is not released by

turning power on/off with the ?/1 button.

4. DVD Ship Mode

• Use this mode when returning the set to the customer after repair.

Procedure:

1. Press the ?/1 button to turn the set on.

2. Press the FUNCTION button to set the function “DVD”.

Press two buttons x

4. After a message “MECHA LOCK” is displayed on the fluorescent indicator tube, pull out the AC plug.

5. To exit from this mode, press the ?/1 button to turn the set on.

5. AM Step Change

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

Procedure:

1. Press the ?/1 button to turn the set ON.

2. Select the function “TUNER”, and press FUNCTION button to select the BAND “AM”.

3. Press the ?/1 button to turn the set OFF.

4. Press two buttons > and ?/1 simultaneously, and the display of fluorescent indicator tube changes to “AM 9 k STEP” or “AM 10 k STEP”, and thus the channel step is changed over.

6. V olume Test Mode

Procedure:

1. Press the ?/1 button to turn the power on.

2. Press three buttons . , H and > simultaneously.

3. The message “VOLUME MAX” is displayed , when press the VOLUME + button. The message “VOLUME MIN” is displayed, when press the VOLUME – button.

4. To exit from this mode, press the ?/1 button to turn the set off.

7. Product Out

This mode moves the optical pick-up to the position durable to vibration and clears all data including preset data stored in the RAM to initial conditions. Use this mode when returning the set to the customer after repair.

Procedure:

1. Press the ?/1 button to turn the power on.

2. Press the FUNCTION button to set the function “DVD”.

3. Press three buttons > , A and ?/1 simultaneously.

4. After the “STANDBY” blinking display finish, the message “MECHA LOCK” is displayed on the fluorescent indicator tube and the ship mode is set.

and

?/1

simultaneously.

HCD-DX155/DX255

DVD SECTION

[TEST DISC LIST]

Be sure to use the DVD disc that matches the signal standards of your region.

• CD

YEDS-18 (Part No.: 3-702-101-01) PATD-012 (Part No.: 4-225-203-01)

• DVD SL (Single Layer) NTSC : HLX-503 (Part No.: J-6090-069-A)

HLX-504 (Part No.: J-6090-088-A)

PAL : HLX-506 (Part No.: J-6090-077-A)

• DVD DL (Dual Layer) NTSC : HLX-501 (Part No.: J-6090-071-A)

HLX-505 (Part No.: J-6090-089-A)

PAL : HLX-507 (Part No.: J-6090-078-A)

8-1. GENERAL DESCRIPTION

The Mirror Time and IOP measurement allows you to make diagnosis and adjustment simply by using the remote commander and monitor TV. The instructions, diagnosis results, etc. are given on the on screen display (OSD). The Mirror Time and IOP measurement is required is such events where servicing a DVD-Player includes changing the Base Unit (BU). For each new BU to be used with a certain MV-044 board, Mirror Time and IOP measurement need to be carried out.

8-4. MIRROR TIME ADJUSTMENT

To enter Mirror Time Adjustment, press 5 “R” button on the remote commander. The screen will appear as below.

MIRR time Adjust Menu

1. CD MIRR time Check:

2. DVD MIRR time Check:

3. Threshold:

4. Save to EEPROM

5. Default set MIRR time

[Open] Tray open [Close] Tray close [0] Return to previous menu

There are five main commands in the Mirr time Adjust menu as shown in the figure above. The functions of each command are described in the following page.

1. CD MIRR time Check

This command checks the Mirror time value for CD disc.

2. DVD MIRR time Check

This command checks the Mirror time value for DVD disc.

3. Threshold

This command displays the threshold value between CD and DVD mirror time.

8-2. STARTING TEST MODE

Press three buttons

x , A and VOLUME + simultaneously

with the DVD player in standby mode. The Test Mode starts, then the menu shown below will be displayed on the TV screen.

Remocon Diagnosis Menu

0. External Chip Check

1. Servo Parameter Check

2. Drive Manual Operation

3. Emergency History

4. Version Information

5. Video Level Adjustment

Model Name : DCX1D_UC IF-con : V Syscon : Ver.

er. xx.xx (xxxx)

x.xxx

The menu above is the Remocon Diagnosis Menu screen which consists of six main function. At the bottom of the menu screen, the model name and IF-con version. To enter Mirror Time Adjustment menu, press button 2 “R” on the remote commander to enter Drive Manual Operation menu. To exit from the T est Mode, press the power button on the remote commander.

8-3. DRIVE MANUAL OPERATION

The Drive Manual Operation menu consists of five main function. By pressing 2 “R” button on the remote commander in the Remocon Diagnosis Menu, the screen will appear as below.

Drive Manual Operation

1. Servo Control

2. Track/Layer Jump

3. Manual Adjustment

4. Tray Aging Mode

5. MIRR time Adjust

0. Return to Top Menu

4. Save to EEPROM

This command saves an adjusted mirror time value to the EEPR OM.

5. Default set MIRR time

This command will set CD and DVD mirror time to firmware def ault value.

[Open] / [Close] Pressing the A button controls the tray for disc change during mirror time adjustment. [0] Return to previous menu Press the 0 “R” button to return to previous menu.

8-4-1. EXECUTING MIRROR TIME ADJUSTMENT

In order to execute mirror time adjustment, the following standard procedures must be followed.

(1) In standby mode, press three buttons x , A and

VOLUME + simultaneously.

(2) Select “2. Drive Manual Operation”.

Remocon Diagnosis Menu

0. External Chip Check

1. Servo Parameter Check

2. Drive Manual Operation

3. Emergency History Check

4. Version information

5. Video Level Adjustment

Model : DCX1D_UC IF-con : Ver. xx.xx (xxxx) Syscon : Ver. x.xxx

HCD-DX155/DX255

(3) Select “5. MIRR time Adjust”.

Drive Manual Operation

1. Servo Control

2. Track/Layer Jump

3. Manual Adjustment

4. Mecha test mode

5. MIRR time Adjust

0. Return to Top Menu

(4) Select “5. Default set MIRR time”.

MIRR time Adjust Menu

1. CD MIRR time Check:

2. DVD MIRR time Check:

3. Threshold:

4. Save to EEPROM:

5. Default set MIRR time:

[Open] Tray open [Close] Tray close [0] Return to previous menu

(5) Select “3. Threshold”.

(6) Confirm the number. If it is 7D, go to next step. If it is any other value, return to step 4.

MIRR time Adjust Menu

(14) Confirm the same values are displayed. If it is not same, return to step 7.

MIRR time Adjust Menu

1. CD MIRR time Check:

2. DVD MIRR time Check: XX XX

3. Threshold:

4. Save to EEPROM:

5. Default set MIRR time:

[Open] Tray open [close] Tray close [0] Return to previous menu

(15) Push the A button to eject tray.

(16) Take out HLX-504 and insert Test Disc YEDS-18 into tray.

(17) Push the A button to close tray.

(18) Push “1. CD MIRR time check”.

(19) Wait for HEX number to display.

(20) Confirm the number, if YY is 5A – E8, proceed with next step. If no, return to 15.

MIRR time Adjust Menu

1. CD MIRR time Check:

2. DVD MIRR time Check:

3. Threshold: 7D

4. Save to EEPROM:

5. Default set MIRR time:

[Open] Tray open [Close] Tray close [0] Return to previous menu

(7) Push the A button to eject tray.

(8) Insert Test Disc HLX-504 into tray.

(9) Push the A button to close tray.

(10) Push “2. DVD MIRR time Check”.

(11) Wait for HEX number to display.

(12) Confirm the number, if XX is 28 – 70, proceed with next step. If no, return to 8.

MIRR time Adjust Menu

1. CD MIRR time Check:

2. DVD MIRR time Check: xx xx

3. Thereshold:

4. Save to EEPROM:

5. Default set MIRR time:

[Open] tray open [close] Tray close [0] Return to previous menu

1. CD MIRR time Check: yy YY

2. DVD MIRR time Check: XX XX

3. Threshold:

4. Save to EEPROM:

5. Default set MIRR time:

[Open] Tray open [close] Tray close [0] Return to previous menu

(21) Push “4. Save to EEPROM”.

(22) Confirm the same values are displayed. If it is not the same, return to step 15.

MIRR time Adjust Menu

1. CD MIRR time check: YY YY

2. DVD MIRR time check: XX XX

3. Threshold:

4. Save to EEPROM:

5. Default set MIRR time:

[Open] Tray open [close] Tray close [0] Return to previous menu

(23) Push the A button to eject tray.

(24) Remove Test Disc YEDS-18 from tray.

(25) Push the A button to close tray.

(26) Press the 0 “R” button to the Drive Manual Operation menu.

(13) Push “4. Save to EEPROM”.

(27) Press the 0 “R” button to return to the Remocon Diagnosis

Menu.

(28) Press the ?/1 button to switch OFF set.

HCD-DX155/DX255

8-5. EXECUTING IOP MEASUREMENT

In order to execute mirror time adjustment, the following standard procedures must be followed.

(1) In standby mode, press three buttons x , A and

VOLUME + simultaneously.

Remocon Diagnosis Menu

0. External Chip Check

1. Servo Parameter Check

2. Drive Manual Operation

3. Emergency History Check

4. Version information

5. Video Level Adjustment

Model : DCX1D_UC IF-con Ver : XX.XX (XXXX) Syscon Ver : X.XX

(2) Select “2. Drive Manual Operation” by pressing the 2 “R”

button on the remote commander. The screen will appear as

below.

Drive Manual Operation

1. Servo Control

2. Track/Layer Jump

3. Manual Adjustment

4. Tray Aging Mode

5. MIRR time adjust

0. Return to top Menu

(5) Wait until a hexadecimal number appear.

Manual Adjust

1. Track Balance Adjust:

2. Track Gain Adjust:

3. Focus Balance Adjust:

4. Focus Gain Adjust:

5. Eq Boost Adjust:

6. Iop. 5B:

7. TRV. Level:

8. S curve(FE) Level:

9. RFL(PI) Level:

0. MIRR Time:

Change Value [0] Return to previous menu

(6) Convert each data from hexadecimal to decimal using conversion table.

(7) Substract between these two values.

(8) If the remainder is smaller than 93 (decimal), then it is OK. However if the value is higher than 93, then the BU is defective and need to be change.

(9) Press the RETURN “R” button to return back to previous

menu.

(10) Press the 0 “R” button to return to Top Menu and power

OFF the DVD Player.

(3) Select “3. Manual Adjustment” by pressing the 3 “R” b utton

on the remote commander. The screen will appear as below.

Manual Adjust

1. Track Balance Adjust:

2. Track Gain Adjust:

3. Focus Balance Adjust:

4. Focus Gain Adjust:

5. Eg boost Adjust:

6. Iop:

7. TRV. Level:

8. S curve(FE) Level:

9. RFL(PI) Level:

0. MIRR Time:

o O Change Value [RETURN] Return to previous menu

(4) Select Iop by pressing the 6 “R” button on the remote

commander.

HCD-DX155/DX255

)

SECTION 5

ELECTRICAL ADJUSTMENT

DVD SECTION

When the base unit is replaced, perform the adjustment and the measurement as shown below in this order.

1) MIRROR TIME ADJUSTMENT (See page 25)

2) EXECUTING IOP MEASUREMENT (See page 27)

[TEST DISC LIST]

Be sure to use the DVD disc that matches the signal standards of your region.

• CD

YEDS-18 (Part No.: 3-702-101-01) PATD-012 (Part No.: 4-225-203-01)

• DVD SL (Single Layer) NTSC : HLX-503 (Part No.: J-6090-069-A)

HLX-504 (Part No.: J-6090-088-A)

PAL : HLX-506 (Part No.: J-6090-077-A)

• DVD DL (Dual Layer) NTSC : HLX-501 (Part No.: J-6090-071-A)

HLX-505 (Part No.: J-6090-089-A)

PAL : HLX-507 (Part No.: J-6090-078-A)

[RF Level Check]

Connection:

Checking Location: MAIN board (Side A)

MAIN BOARD

CN1105 Pin

CN1105 Pin 3 (GND)

(SIDE A)

(RFMON)

CN1105

IC501

IC1103

oscilloscope

MAIN board

CN1105 pin 6 (RFMON)

CN1105 pin

(GND)

+ –

Procedure:

1. Connect an oscilloscope to CN1105 pin 6 (RFMON) and CN1105 pin 3 (GND) on the MAIN board.

2. Turn the power on.

3. Insert the CD test disc (refer to the TEST DISC LIST), and press the H button to play the disc back.

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

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

clearly distinguished at the center of the waveform.

5. Eject the CD disc, and insert the DVD SL test disk (refer to the TEST DISC LIST), and press the H button to play the disc back.

RF signal waveform

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

level: 0.57 to 1.1 Vp-p (CD)

0.58 to 1.23 Vp-p (DVD

+ 64 hidden pages

Sony HCDDX-155 Service manual

TABLE OF CONTENTS

3-1. DISASSEMBLY FLOW

3-2. CASE, FRONT PANEL ASSY

3-3. FL BOARD, SW BOARD

3-4. JACK BOARD, LED BOARD

3-5. I/O BOARD, TUNER

3-6. SPEAKER BOARD, D.C. FAN

3-7. MAIN BOARD

3-8. POWER BOARD

3-9. DVD MECHANISM DECK (CDM81C-DVBU101)

3-10. TRAY

3-11. MOTOR BOARD M761 (LD/ST MOTOR), M762 (BU U/D MOTOR)

3-12. BASE UNIT (DVBU101)

3-13. OPTICAL PICK-UP (KHM-310CAB)

3-14. GEAR (SUB TRAY 1), GEAR (SUB TRAY 2)

3-15. LEVER ASSY

3-16. STOCKER SECTION

3-17. CAM (STOCKER)

3-18. GEAR (STOCKER 3)

3-19. ROTARY ENCODER (MD)

3-20. GEAR (BU1)