HCD-DX255
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SERVICE MANUAL
Sony Corporation
Audio Business Group
Published by Sony Techno Create Corporation
US Model
Canadian Model
HCD-DX155/DX255
E Model
Australian Model
HCD-DX155
SUPER AUDIO CD/DVD RECEIVER
9-887-098-05
2007J16-1
© 2007.10
Ver. 1.4 2007.10
HCD-DX155/DX255
HCD-DX155/DX255 are the amplifier, DVD/CD
and tuner section in DAV-DX155/DX255.
SPECIFICATIONS
Model Name Using Similar Mechanism HCD-DX150
Mechanism T ype CDM81C-DVBU101
Optical Pick-up Name
KHM-310CAB/C2RP
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.
— Continued on next page —
Photo : HCD-DX255
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
3 ohm at 170 - 20,000 Hz,
0.7 % THD
SW: 80 W 3 ohm at 40 -
170 Hz, 0.7 % THD
DX255
POWER OUTPUT AND
TOTAL HARMONIC
DISTORTION
(FTC Output Power): FL/FR/LS/RS/C: 84 W/ch
3 ohm at 170 - 20,000 Hz,
0.7 % THD
SW: 160 W 1.5 ohm at 40 -
170 Hz, 0.7 % THD
Amplifier section
DX155
US models:
Surround mode (reference)
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)
Mexican and 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: 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)
Latin American models:
Stereo mode (rated) 100 W + 100 W (3 ohms at
1 kHz, 1 % THD)
Surround mode (reference)
RMS output power, 10 %
THD
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)
DX255
US models:
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)
2
HCD-DX155/DX255
MODEL IDENTIFICATION
– Rear Panel –
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
*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
S VIDEO:
Y: 1 Vp-p 75 ohms
C: 0.286 Vp-p 75 ohms
IDEO: 1 Vp-p 75 ohms
COMPONENT:
Y: 1 Vp-p 75 ohms
P
B
/C
B
, P
R
/C
R
: 0.7 Vp-p
75 ohms
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)
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
1
/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.
COAXIAL
AM
FM
75
SPEAKER
FRONT R FRONT L SUR R SUR LCENTER WOOFER
COMPONENT VIDEO OUT
TV/VCR
MONITOR OUT
ANTENNA
(DVD ONLY)
YP
B
/C
B
P
R
/C
R
RLAUDIO IN
VIDEO
(DVD ONLY)
S VIDEO
Parts No.
3
HCD-DX155/DX255
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free 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.
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.
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.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT
DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
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)
1.5 k
Ω
0.15
µ
F
AC
voltmete
r
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
4
HCD-DX155/DX255
TABLE OF CONTENTS
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 (BU2) ...................................................................... 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
Ver. 1.4
5
HCD-DX155/DX255
SECTION 1
SERVICING NOTE
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
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 pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH
1. Open the cover and turn POWER on with no disc inserted.
2. Confirm that the following operation is performed while
observing the objecting lens.
1)Confirm that laser beam is spread.
2)Up and down motion of the objective lens. (3 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 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 tray lock is not released by
turning power on/off with the ?/1 button.
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.
When the self-diagnosis function is activated to
prevent the system from malfunctioning, a 5-
character 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.
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.
Self-diagnosis Function
(When letters/numbers appear in the
display)
First 3
characters of
the service
number
Cause and/or corrective action
C 13 The disc is dirty.
,Clean the disc with a soft cloth
C 31 The disc is not inserted correctly.
,Restart the system, then re-insert
the disc correctly.
E XX
(xx is a number)
To prevent a malfunction, the
system has performed the self-
diagnosis function.
,Contact your nearest Sony
dealer or local authorized Sony
service facility and give the 5-
character service number.
Example: E 61 10
C:13:50
VER.X.XX
6
HCD-DX155/DX255
CN3002
MAIN BOARD
POWER BOARD
CN902
RED
BLACK
C903
C939
C933
C932
Discharge the charged electricity in capacitors to prevent electric shock as follows
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
(Parts face side)
(Parts face side)
*
Connect the specified resistor
between black and red leads
gear
tweezers
1
Insert tip of tweezers through the hole
of bottom plate, and roate the gear in
the counter-clockwise direction.
DVD lid
tape
2
Attach an adhesive tape on the DVD LID and draw it out.
HOW TO OPEN THE DISC TABLE WHEN POWER SWITCH TURNS OFF
7
HCD-DX155/DX255
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
C910
C924 IC921
C930
%%
PRECAUTION WHEN INSTALLING A NEW OP UNIT /
PRECAUTION BEFORE 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.)
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).
8
HCD-DX155/DX255
SECTION 2
GENERAL
This section is extracted
from instruction manual.
Front panel
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)
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)
Rear panel
A SPEAKER jacks (13)
B MONITOR OUT (S VIDEO/VIDEO) jacks
(24)
C AM terminal (13)
D COAXIAL FM 75Ω jack (13)
E TV/VCR (AUDIO IN R/L) jacks (27)
F COMPONENT VIDEO OUT jacks (24)
COAXIAL
AM
FM
75
SPEAKER
FRONT R FRONT L SUR R SUR LCENTER WOOFER
COMPONENT VIDEO OUT
TV/VCR
MONITOR OUT
ANTENNA
(DVD ONLY)
YP
B
/C
B
P
R
/C
R
RLAUDIO IN
VIDEO
(DVD ONLY)
S VIDEO
9
HCD-DX155/DX255
Front panel display
About the indications in the front panel display
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.
10
HCD-DX155/DX255
Remote control
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)
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)
[/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.
ALPHABETICAL ORDER
A – O
P – Z
BUTTON DESCRIPTIONS
11
HCD-DX155/DX255
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.
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 (BU2)
(Page 23)
3-18.GEAR (STOCKER 3)
(Page 22)
Ver. 1.4
12
HCD-DX155/DX255
3-2. CASE, FRONT PANEL ASSY
Note: Follow the disassembly procedure in the numerical order given.
3
loading panel
4
two
screws
(CASE3 TP2)
7
case
qs
four screws (+BV3)
0
connector (CN3001)
6
five
screws
(+BVTP 3
×
8)
gear
tweezers
1
Insert tip of tweezers through the hole
of bottom plate, and roate the gear in
the counter-clockwise direction.
DVD lid
tape
2
Attach an adhesive tape on the DVD LID and draw it out.
8
sheet
9
w
ire (flat type)
23core (CN509)
qa
connector (CN312)
qd
claw
qd
claw
qf
front panel assy
5
two
screws
(CASE3 TP2)
When re-assembling, leave 30 mm between
harnesses A and B for safety.
harnesses A
harnesses B
clamp
30mm
13
HCD-DX155/DX255
3-4. JACK BOARD, LED BOARD
3-3. FL BOARD, SW BOARD
1
rivet
4
four
screws (+BVTP 2.6)
qs
two
screws (+BVTP 2.6)
6
three
screws (+BVTP 2.6)
9
wire (flat type)
23core (CN801)
7
connector (CN811)
q;
connector (CNP801)
8
connector (CN805)
2
six
claws
3
hold plate (FFC)
hold plate (FFC)
5
shield plate (FC)
qd
SW board
qa
FL board
qf
button (power)
When reassembling, route the
harness and flexible cable as
shown in the illustration.
4
JACK board
5
eight
screws (+BVTP 2.6)
6
LED board
7
button (disk),
indicator (disk)
9
button (disk)
q;
button (play)
3
screw (+BVTP 2.6)
1
knob (vol)
2
nut
8
five indicators (disk)
14
HCD-DX155/DX255
3-6. SPEAKER BOARD, D.C. FAN
3-5. I/O BOARD, TUNER
3
tuner
1
two screws
(+BVTT 3
×
6)
2
wire (flat type)
9core
qa
I/O board
8
wire (flat type)
13core(CN201)
q;
Open the
back panel .
7
wire (flat type)
7core(CN202)
6
wire (flat type)
13core(CN311)
5
wire (flat type)
9core(CN203)
4
connector
(CN312)
9
eight
screws
(+BVTP 3
×
8)
3
D.C. fan
2
two
screws
(+BVTP 4
×
8)
8
two
screws
(+BVTT 3
×
8)
1
connector
(CN3000)
4
connector
(CN303)
5
connector
(CN302)
6
connector
(CN301)
7
two
screws
(+BV3)
9
SPEAKER board
screw
lead pin
When assembling,
clamp the three harnesses with
a lead pin or a similar tool so
that they do not touch this screw.
three harnesses
Ver. 1.2
15
HCD-DX155/DX255
3-7. MAIN BOARD
1
wire (flat type) 21core (CN508)
qf
wire (flat type) 23core (CN509)
wf
MAIN board
3
connector (CN1201)
7
connector
(CN303)
ws
eight screws (+BV 3)
When re-assembling, attaching the
two heat radiation sheets on the
IC MAIN board first, and then attach
the heat sink (AMP).
After twist the harness once,
install the connector .
POWER board
MAIN board
heatsink (AMP)
radiation
sheets
IC on the
MAIN board
2
wire (flat type) 13core (CN507)
4
wire (flat type) 24core (CN1101)
5
wire (flat type) 7core (CN1302)
wa
two radiation
sheets
6
wire (flat type) 13core (CN1301)
8
connector
(CN302)
9
connector
(CN301)
q;
connector (CN3000)
qa
connector (CN3001)
qs
connector
(CN3002)
qd
connector
(CN515)
qg
two screws (+BVTP 3
×
8)
wd
clamp
qj
HEATSINK B board
w;
heatsink (AMP)
qh
HEATSINK A board
ql
screw
(+BVTP 3
×
12)
qk
two
screws
(+BV 3)
When re-assembling, leave 30 mm between
harnesses A and B for safety.
harnesses A
harnesses B
clamp
30mm
screw
lead pin
When assembling,
clamp the three harnesses with
a lead pin or a similar tool so
that they do not touch this screw.
three harnesses
Ver. 1.2
16
HCD-DX155/DX255
3-8. POWER BOARD
5
shield (H/L)
2
connector (CN3002)
3
connector (CN901)
1
connector (CN515)
4
two screws (+BV 3)
6
five screws (+PWH 3
×
8)
7
POWER board
After twist the harness once,
install the connector .
POWER board
MAIN board
When re-assembling, leave 30 mm between
harnesses A and B for safety.
harnesses A
harnesses B
clamp
30mm
pc board
holder
(bottom side)
two claws
Installing the pc board holder
INSTALLING THE POWER BOARD
(DX155 : SP, AUS, E3)
q;
pc board
holder
1
two covers (FJ)
2
two covers (FJ)
3
three washers
4
install the PC board holder
5
POWER board
6
five screws (+PWH 3
×
8)
4
6
5
1
2
3
When re-assembling, attaching the
heat radiation sheets on the chassis first,
and then attach POWER board.
heat radiation sheets
×
6
(DX155 : SP, AUS, E3)
heat radiation sheets
×
3
(Except DX155 : SP, AUS, E3)
heat radiation
sheets
POWER
board
Ver. 1.2
17
HCD-DX155/DX255
3-9. DVD MECHANISM DECK (CDM81C-DVBU101)
4
MD COVER
3
four
screws (+BV 3)
2
Remove the harness and flexible cable.
flexible cable
harness
1
wire (flat type) 21core (CN508)
5
four
screws
(+BVTP 3
×
10)
6
DVD mechanism deck
(CDM81C-DVBU101)
18
HCD-DX155/DX255
3-10. TRAY
1
two
screws
(+BTTP 2.6
)
2
two
screws
(+BTTP 2.6)
3
bracket
4
5
tray
1
screw
(+BTTP 2.6)
2
bracket
3
screw
(+BTTP 2.6)
4
MOTOR board
5
Remove soldering from the two points.
6
M761 (LD/ST MOTOR)
7
Remove soldering from the two points.
8
M762 (BU U/D MOTOR)
3-11. MOTOR BOARD M761 (LD/ST MOTOR), M762 (BU U/D MOTOR)
19
HCD-DX155/DX255
1
two floating
screws
(+PTPWH2.6)
2
floating
screw
(+PTPWH2.6)
3
base unit (DVBU101)
1
two
screws
(+BTP 2.6
×
8
)
2
two
screws
(+BTP 2.6
×
8
)
6
holder (310) assy
4
insulator
screw
7
insulator
screw
qd
optical pick-up
(KHM-310CAB)
5
0
insulator
qa
insulator
8
insulator
screw
qs
insulator
3
insulator
screw
9
insulator
3-12. BASE UNIT (DVBU101)
3-13. OPTICAL PICK-UP (KHM-310CAB)
20
HCD-DX155/DX255
1
five screws
(+PTPWH 2.6
×
8)
2
gear (sub tray 2)
3
gear (sub tray 2)
4
three gears
(sub tray 1)
gear (sub tray 2)
gear (sub tray 2)
gear (sub tray 1)
PRECAUTION DURING GEAR (SUB TRAY 1/2) INSTALLATION
Align the marks of the gears as shown in the illustration.
1
screw
(+PTPWH 2.6
×
8)
3
floating screw
(+PTPWH M2.6)
5
lever (sub tray)
lever (sub tray)
6
lever (release)
lever (release)
7
lever (mode)
cam (BU)
lever (mode)
2
shutter (tray)
4
lever (sub tray)
shutter (tray)
When re-assembling, insert the lever (sub tray)
between the bosses of the shutter (tray).
boss
boss
Before re-assembling, slide the cam (BU)
in the direction of the arrow.
Before re-assembling, align the lever (release)
and the lever (sub tray) with the lever (mode)
as shown in the illustration.
dowel dowel
3-14. GEAR (SUB TRAY 1), GEAR (SUB TRAY 2)
3-15. LEVER ASSY
21
HCD-DX155/DX255
2
stocker section
1
Rotate the gear (SS3) in the
direction of the arrow.
5
two screws
(+PTPWH 2.6
×
8)
6
two cams
(stocker)
8
cam
(stocker)
cam (stocker)
cam (stocker)
cam (stocker)
hole
gear
(stocker 2)
gear
(stocker 2)
gear
(stocker 2)
gear (stocker 3)
2
tension spring (SW)
4
lever (SW)
1
screw
(+PTPWH 2.6
×
8)
7
screw
(+PTPWH 2.6
×
8)
3
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
3-17. CAM (STOCKER)
22
HCD-DX155/DX255
1
screw
(+PTPWH 2.6
×
8)
2
gear (stocker 3)
gear (stocker 3)
(reverse-side)
rotary encoder
(ST U/D encoder)
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
1
three screws
(+BTTP 2.6)
2
rotary encoder (MD)
rotary encoder (MD)
gear (BU2)
PRECAUTION DURING ROTARY ENCODER (MD) INSTALLATION
cam (BU)
Slide the cam (BU) in the direction of the arrow so that the mark
of the gear (BU2) can be seen. Engage the gears while aligning
the mark of the gear (BU2) with the protruding part of the
rotary encoder.
protruding part
mark
3-18. GEAR (STOCKER 3)
3-19. ROTARY ENCODER (MD)
Ver. 1.4
23
HCD-DX155/DX255
2
screw
(+PTPWH 2.6
×
8)
4
screw
(+PTPWH 2.6
×
8)
6
screw
(+PTPWH 2.6
×
8)
3
pulley (BU)
5
gear (BU1)
7
gear (BU2)
1
belt (sub tray)
gear (BU2)
cam (BU)
PRECAUTION DURING GEAR (BU2) INSTALLATION
Before re-assembling, slide the cam (BU) in the direction of
the arrow.
Assemble the gear (BU2) in such a manner that the groove
of the cam (BU) is aligned with the rib of the gear (BU2).
rib
groove
3-20. GEAR (BU2)
Ver. 1.4
24
HCD-DX155/DX255
SECTION 4
TEST MODE
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 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.
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”.
3.
Remove all discs, and then press two buttons
x
and
.
simultaneously.
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 the
VOLUME control is turned in the dirction of (+).
The message “VOLUME MIN” is displayed, when the
VOLUME control is turned in the dirction of (–).
4. To exit from this mode, press the ?/1 button to turn the set of f.
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.
Remove all discs, and then
press three buttons > , A and
?/1 simultaneously.
4. After the “ST ANDBY” blinking display f inishes, the message
“MECHA LOCK” is displayed on the fluorescent indicator
tube disconnect the AC power plug, then the ship mode is
set.disconnect the AC power plug, then the ship mode is set.
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, FL, LED
and KEY.
2-1. Display 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 test mode is activ ated, all segments and LEDs
are turned on.
4. To exit from this mode, press three buttons X , . and A
simultaneously.
2-2. V ersion T est Mode
Procedure:
1. When the display test mode is activ ated, press the . button
and the message “DCX1” (DX155), “DCX1D” (DX255) are
displayed, the version test mode is activated.
2. Whenever the . button is pressed, the display changes in
the following order.
*1: U2 changes depending on destination.
3. Press the > button and the date of the software 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 display test mode is activ ated, press the H button,
to select the key test mode.
2. T o enter the KEY test mode, the fluorescent indicator displays
“K0 V0”. 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 are pressed correctly, “K8
V0” is displayed.
3. When the VOLUME control is turned in the direction of (+),
“V0” is changed to “V1”, then ... “V9”.
When the V OLUME control is turned in the direction of (–),
“V0” is changed to “V9”, then ... “V1”.
4. To exit from this mode, press three buttons X , . and A
simultaneously.
Ver. 1.3
“DCX1” (Model name) t “U2
*1
” (Destination) t MC t SYS
TM T DSP T TA T ST T CDMB T CDMA T DVD T UI
25
HCD-DX155/DX255
DVD SECTION
8-1. GENERAL DESCRIPTION
The 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).
Be sure to execute the IOP measurement when a BU (Base Unit) is
replaced.
8-2. HOW TO ENTER TEST MODE
While pressing the x and A buttons simultaneously, turn
VOLUME + with the DVD player in power on.
The T est Mode starts, then the menu shown belo w will be displayed
on the TV screen.
* The display of the “Model Name” of the “Remocon Diagnosis
Menu” change with the model and the destination. Refer to below
on the model name.
DX155 : DCX1
DX255 : DCX1D
The menu above is the Remocon Diagnosis Menu screen which
consists of five main functions. At the bottom of the menu screen, the
model name and IF-con version. To exit from the Test Mode, press
the power button on the remote commander.
8-3. EXECUTING IOP MEASUREMENT
In order to execute IOP measurement, the following standard
procedures must be followed.
(1) In power on, while pressing the x and A buttons
simultaneously, turn VOLUME + .
Remocon Diagnosis Menu
0. External Chip Check
1. Servo Parameter Check
2. Drive Manual Operation
3. Emergency History
4. Version Information
Model Name : DCX1_ XX
IF-con : V
Syscon : Ver.
er. XX.XX (XXXX)
X.XXX
*
1
*1: Changes depending on destination
Ver. 1.3
: DCX1_ XX
*
1
Remocon Diagnosis Menu
0. External Chip Check
1. Servo Parameter Check
2. Drive Manual Operation
3. Emergency History Check
4. Version information
Model Name
IF-con : Ver. XX.XX (XXXX)
Syscon : Ver. X.XXX
*1: Changes depending on destination
(2) Select “2. Drive Manual Operation” by pressing the 2 “R”
button on the remote commander. The screen will appear as
shown.
(3) Select “3. Manual Adjustment” by pressing the 3 “R” button
on the remote commander. The screen will appear as shown.
(4) Select “6.IOP” by pressing the 6 “R” button on the remote
commander.
(5) Wait until a hexadecimal number appear.
(6) Convert each data from hexadecimal to decimal using
conversion table.
(7) Please find the label on the rear of the BU (Base Unit).
The default IOP value is written in the label.
(8) Subtract between these two values.
(9) If the remainder is smaller than 93 (decimal), then it is OK.
Ho wever if the v alue is higher than 93, then the BU is def ective
and need to be change.
(10) Press the RETURN “R” button to return back to previous
menu.
(11) Press the 0 “R” button to return to Top Menu and power
off the DVD Player.
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
Manual Adjust
1. Track Balance Adjust:
2. Track Gain Adjust:
3. Focus Balance Adjust:
4. Focus Gain Adjust:
5. Eq 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
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
26
HCD-DX155/DX255
8-4. EMERGENCY HISTORY
To check the emergency history, please follow the following
procedure.
(1) From the Top Menu of Remocon Diagnosis Menu, select “3.
Emergency History Check” by pressing the 3 “R” button on
the remote commander. The following screen appears on the
on-screen display.
(2) Y ou can check the total time when the laser is turned on during
playback of DVD and CD from the above menu. The maximum
time, which can be displayed are 999h 59min.
(3) You can check the error code of latest 10 emergency history
from the above menu. To view the previous or next page of
emergency history , press . “R” or > “R” on the remote
commander. The error code consists of the following three
blocks. The first block indicates the error code. The second
block indicates the parameter and the third block indicates the
time of error code as shown below.
• Error Code
*1 : Error Code
*2 : Parameter of error code
*3 : Time of error code
Emg.History Check
1. 01 05 04 04
Laser Hours CD 999h 59min
DVD 999h 59min
00 92 46 00
00 00 00 00 00 00 23 45
2. 02 02 01 01 00 A9 4B 00
00 00 00 00 00 00 23 45
Next Next Page Prev Prev Page
O Return to Top Menu
Emg.History Check
1. 01 05 04 04
Laser Hours CD 999h 59min
DVD 999h 59min
00 92 46 00
00 00 00 00 00 00 23 45
2. 02 02 01 01 00 A9 4B 00
00 00 00 00 00 00 23 45
Next Next Page Prev Prev Page
O Return to Top Menu
*
1
*
2
*
3
The meaning of error code is as below:
01: Communication error (No reply from syscon)
02: Syscon hung up
03: Power OFF request when syscon hung up
19: Thermal shutdown
24: MoveSledHome error
25: Mechanical move error (5 Changer)
26: Mechanical move stack error
30: DC motor adjustment error
31: DPD offset adjustment error
32: TE balance adjustment error
33: TE sensor adjustment error
34: TE loop gain adjustment error
35: FE loop gain adjustment error
36: Bad jitter after adjustment
40: Focus NG
42: Focus layer jump NG
52: Open kick spindle error
51: Spindle stop error
60: Focus on error
61: Seek fail error
62: Read Q data/ID error
70: Lead in data read fail
71: TOC read time out (CD)
80: Can’t buffering
81: Unknown media type
8-4-1. Clear the Laser Hour
Press DISPLAY “R” button and then press CLEAR “R” button.
The data for both CD and DVD data are reset.
Emg.History Check
1. 01 05 04 04
Laser Hours CD 0h 0min
DVD 0h 0min
00 92 46 00
00 00 00 00 00 00 23 45
2. 02 02 01 01 00 A9 4B 00
00 00 00 00 00 00 23 45
Next Next Page Prev Prev Page
O Return to Top Menu
Emg.History Check
1. 00 00 00 00
Laser Hours CD 999h 59min
DVD 999h 59min
00 00 00 00
00 00 00 00 00 00 00 00
2. 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
Next Next Page Prev Prev Page
O Return to Top Menu
8-4-2. Clear the Emergency History
Press TOP MENU “R” button and then press CLEAR “R” button.
The error code for all emergency history would be reset.
8-4-3. Clear the Initialize Setup Data
Press MENU “R” button and then press CLEAR “R” button on
the remote commander.
Ver. 1.3
27
HCD-DX155/DX255
Version information
O Return to Top Menu
Firm (Main) : Ver. xxxxx
Firm (Sub) : xxxxx
RISC : xxxxx
8032 : xxxxx
Audio DSP : xxxxx
Servo DSP : xxxxx
8-4-4. Return to the Top Menu of Remocon Diagnosis
Menu
Press 0 “R” button on the remote commander.
• Check Version Information
To check the version information, please follow the following
procedure.
(1) From the Top Menu of Remocon Diagnosis Menu, select “4.
Version Information” by pressing the 4 “R” button on the
remote commander. The following screen appears on the on-
screen display.
To return to the T op Menu of Remocon Diagnosis Menu, press
0 “R” on the remote commander.
Ver. 1.3
28
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.
EXECUTING IOP MEASUREMENT (See page 25)
[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:
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.
Checking Location: MAIN board (Side A)
+
–
CN1105 pin 6 (RFMON)
CN1105 pin 3 (GND)
oscilloscope
MAIN board
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
)
IC501
IC1103
3
6
CN1105 Pin 3 (GND)
CN1105 Pin 6 (RFMON)
CN1105
MAIN BOARD
(SIDE A)
Ver. 1.3
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