Sony HCD-EC68USB Service Manual
HCD-EC68USB
SERVICE MANUAL
Ver. 1.1 2008.06
• HCD-EC68USB is the amplifi er, USB, CD player
and tuner section in MHC-EC68USB.
SPECIFICATIONS
Model Name Using Similar Mechanism
Mechanism Type
Base Unit Name
Optical Pick-up Block Name
AEP Model
E Model
NEW
CDM88A-K6BD91UR-WOD
BU-K6BD91UR-WOD
KSM-213DCP
European model:
Power output (rated):
70 W + 70 W (at 6 Ω, 1 kHz,
1% THD)
RMS output power (reference):
90 W + 90 W (per channel at 6 Ω,
1 kHz, 10% THD)
Other models:
220, 240 V, 50/60 Hz
Power output (rated):
50 W + 50 W (at 6 Ω, 1 kHz,
1% THD)
RMS output power (reference):
70 W + 70 W (per channel at 6 Ω,
1 kHz, 10% THD)
Inputs
AUDIO IN (stereo mini jack):
Sensitivity 800 mV, impedance 22 kilohms
(USB) port: Type A
Outputs
PHONES (stereo mini jack): accepts
headphones with an impedance of 8 Ω or
more
SPEAKER: impedance
6 Ω
USB section
Supported bit rate
MP3 (MPEG 1 Audio Layer-3):
32 − 320 kbps, VBR
Sampling frequencies
MP3 (MPEG 1 Audio Layer-3):
32/44.1/48 kHz
Transfer speed
Full-Speed
Supported USB device
Mass Storage Class
Maximum current
500 mA
CD player section
System: Compact disc and digital audio
system
Laser: Semiconductor laser (λ=770 −
810 nm)
Emission duration: continuous
Frequency response: 20 Hz − 20 kHz
Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 88 dB
Tuner section
FM stereo, FM/AM superheterodyne tuner
Antenna:
FM lead antenna
AM loop antenna
FM tuner section:
Tuning range:
87.5 − 108.0 MHz (50 kHz step)
Intermediate frequency: 10.7 MHz
AM tuner section:
Tuning range
European mo del:
531 − 1,602 kHz
(with 9 kHz tuning interval)
Other models:
530 − 1,710 kHz
(with 10 kHz tuning interval)
531 − 1,710 kHz
(with 9 kHz tuning interval)
Intermediate frequency: 450 kHz
General
Power requirements
European model:
AC 230 V, 50/60 Hz
Mexican model: AC 127 V, 60 Hz
Argentine model: AC 220 V, 50/60 Hz
Other models: AC 120, 220 or 230 – 240 V,
50/60 Hz, adjustable with voltage selector
Power consumption
European model:
130 W
0.5 W (in Power Saving Mode)
Other models: 110 W
Dimensions (w/h/d) (excl. speakers)
Approx. 200 × 306 × 415 mm
Mass (excl. speakers)
European model:
6.0 kg
Other models:
5.6 kg
change without notice.
COMPACT DISC RECEIVER
9-889-055-02
2008F05-1
2008.06
©
Sony Corporation
Audio Business Group
Published by Sony Techno Create Corporation
HCD-EC68USB
Ver. 1.1
• 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 specifi ed herein may result in hazardous radiation exposure.
This appliance is
classified as a CLASS 1
LASER product. This
marking is located on the
rear exterior.
TABLE OF CONTENTSNotes on chip component replacement
1. SERVICING NOTES ............................................. 3
2. GENERAL .................................................................. 7
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 8
3-2. Side Panel (L)/(R) ........................................................... 9
3-3. Panel (Top) ...................................................................... 9
3-4. MAIN Board ................................................................... 10
3-5. Front Panel Block ........................................................... 10
3-6. Back Panel Block ............................................................ 11
3-7. 3 CD Mechanism Block .................................................. 11
3-8. Base Unit ......................................................................... 12
3-9. OP Base Assy (KSM-213D) ........................................... 12
3-10. Belt (DLM3A) ................................................................ 13
4. TEST MODE ............................................................ 14
5. ELECTRICAL ADJUSTMENTS ........................ 18
6. DIAGRAMS
6-1. Block Diagram - CD SERVO, TUNER Section - ........... 20
6-2. Block Diagram - USB Section - ..................................... 21
6-3. Block Diagram - MAIN Section - ................................... 22
6-4. Printed Wiring Board - CD Board - ................................ 24
6-5. Schematic Diagram - CD Board - ................................... 25
6-6. Printed Wiring Boards - USB Section - .......................... 26
6-7. Schematic Diagram - USB Section - .............................. 27
6-8. Printed Wiring Board
- MAIN Board (Suffi x-12/-13) - ..................................... 28
6-9. Printed Wiring Board - MAIN Board (Suffi x-14) - ........ 29
6-10. Schematic Diagram - MAIN Board (1/2) - ..................... 30
6-11. Schematic Diagram - MAIN Board (2/2) - ..................... 31
6-12. Printed Wiring Board - LOW AMP Board - ................... 32
6-13. Schematic Diagram - LOW AMP Board - ...................... 32
6-14. Printed Wiring Boards - KEY Section - .......................... 33
6-15. Schematic Diagram - KEY Section - .............................. 33
6-16. Printed Wiring Board - PANEL Board (Suffi x-12) - ...... 34
6-17. Printed Wiring Board - PANEL Board (Suffi x-13) - ...... 35
6-18. Printed Wiring Board - PANEL Board (Suffi x-14) - ...... 36
6-19. Schematic Diagram - PANEL Board - ............................ 37
6-20. Printed Wiring Board - PT Board - ................................. 38
6-21. Schematic Diagram - PT Board - .................................... 39
7. EXPLODED VIEWS
7-1. Panel Section ................................................................... 48
7-2. Front Panel Section ......................................................... 49
7-3. Chassis Section ............................................................... 50
7-4. Main Section ................................................................... 51
7-5. 3 CD Mechanism Section
(CDM88A-K6BD91UR-WOD) ...................................... 52
SAFETY-RELATED COMPONET 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.
2
8. ELECTRICAL PARTS LIST .............................. 53
Note: Refer to “Suffi x-14” for DIAGRAMS of 120V AC area in E
model.
SECTION 1
SERVICING NOTES
HCD-EC68USB
Ver. 1.1
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 fl exible 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 refl ective 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.
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 fl ow)
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.
MODEL IDENTIFICATION
– Back Panel –
Model Part No.
AEP model
120V AC area in E, Chilean and Peruvian
models
Mexican model
Argentina model
MODEL
NUMBER
LABEL
3-398-095-0[]
3-398-096-0[]
3-398-097-0[]
3-398-098-0[]
RELEASING THE DISC TRAY LOCK
The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.
Releasing Procedure:
1. Press [
] button to turn the power on.
?/1
2. Press the [FUNCTION] button to select CD function.
3. While pressing the [
] button, press the [Z] button for more 5
x
seconds).
4. The message “UNLOCKED” is displayed and the disc tray is
unlocked.
Note: When “LOCKED” is displayed, the slot lock is not released by
turning power on/off with the [
?/1
] button.
3
HCD-EC68USB
SUFFIX-12/-13/-14 DISCRIMINATION OF PRINTED WIRING BOARDS
– MAIN Board (Component Side) –
Suffix-12 : 1-875-488-12
Suffix-13 : 1-875-488-13
Suffix-14 : 1-875-488-14
– PANEL Board (Component Side) –
Suffix-12 : 1-875-490-12
Suffix-13 : 1-875-490-13
Suffix-14 : 1-875-490-14
– USB CONN Board (Component Side) –
Suffix-12 : 1-875-497-12
Suffix-13 : 1-875-497-13
Suffix-14 : 1-875-497-14
– JACK Board (Component Side) –
Suffix-12 : 1-875-493-12
Suffix-13 : 1-875-493-13
Suffix-14 : 1-875-493-14
4
HOW TO OPEN THE TRAY WHEN POWER SWITCH TURN OFF
HCD-EC68USB
pull the tray by the hand.
HOW TO REMOVE THE KNOB (VOL)
knob (VOL)
gear
front panel block
(back view)
lever
Turn a gear by a driver
till a lever falls down
to the position of the figure.
hole
Push the knob (VOL) by the flat head driver.
5
HCD-EC68USB
CAPACITOR DISCHARGE FOR ELECTRIC SHOCK PREVENTION
In checking the MAIN board, make a capacitor discharge
of C622 and C626 for electric shock prevention.
800 Ω/2W
MAIN board
800 Ω/2W
C626
C622
MAIN board
6
Guide to parts and controls
SECTION 2
GENERAL
also be performed using the buttons on the unit having the same or similar names.
HCD-EC68USB
This section is extracted
from instruction manual.
Unit
/ (on/standby)
Press to turn on the system.
Remote sensor
Unit: (play/pause)
Remote: (play)
(pause)
Presstostartorpauseplayback.
(stop)
Presstostopplayback.
FUNCTION
Presstoselectthefunction.
CD
Press to select the CD function.
TUNER/BAND
Press to select the TUNER function.
Press to select FM or AM reception
mode.
USB
Press to select the USB function.
/ (go back/go forward)
Unit: TUNING +/−
Remote: +/− (tuning)
Press to tune in the desired station.
/ (rewind/fast forward)
Unit: USB
Press to select the USB function.
DISPLAY
Presstochangethe informationonthe
display.
Unit: DSGX, EQ
Remote: EQ
(open/close)
Press to insert and eject a disc.
R
Unit: DISC 1 − 3
Press to select a disc. Press to switch to
the CD function from other function.
RB
(USB) port
Connect an optional USB device (Digital
music player or USB storage media).
RT
AUDIO INPUT jack
Connect to an audio component
(Portable audio player, etc.).
PHONES jack
Connect the headphones.
Remote
RG
Unit: DISC SKIP/EX-CHANGE
Press to select a disc. Press to exchange a
disc while playing.
Remote: DISC SKIP
Press to select a disc.
RH
Unit: ERASE
from the connected optional USB device
(Digital music player or USB storage
media).
ENTER
Press to enter the settings.
Remote: CLEAR
Press to delete a pre-programmed track
RI
USB SYNC REC/REC1
Press to record from a disc onto the
connected optional USB device (Digital
music player or USB storage media).
RK
Unit: MASTER VOLUME
Turn to adjust the volume.
Remote: VOLUME +/−
Pressto adjustthevolume.
RL
CLOCK/TIMER SET
Presstosettheclockandthetimers.
RM
REPEAT/FM MODE
Press to listen to a disc, an USB device, a
Press to select the FM reception mode
(monaural or stereo).
TUNER MEMORY
Press to preset the radio station.
PLAY MODE/TUNING MODE
Press to select the play mode of a CD,
MP3 disc or an optional USB device
(Digital music player or USB storage
media).
Press to select the tuning mode.
X
+/− (select folder)
Press to select a folder.
XB
SLEEP
Press to set the Sleep Timer.
Battery compartment lid
7
HCD-EC68USB
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SET
3-2. SIDE PANEL (L)/(R)
(Page 9)
3-3. PANEL (TOP)
(Page 9)
SECTION 3
DISASSEMBLY
3-5. FRONT PANEL BLOCK
(Page 10)
3-7. 3 CD MECHANISM BLOCK
(Page 11)
3-8. BASE UNIT
(Page 12)
3-9. OP BASE ASSY
(KSM-213D)
(Page 12)
3-4. MAIN BOARD
(Page 10)
3-10. BELT (DLM3A)
(Page 13)
3-6. BACK PANEL BLOCK
(Page 11)
8
Note: Follow the disassembly procedure in the numerical order given.
3-2. SIDE PANEL (L)/(R)
four screws
(case3 TP)
side panel (L)
two screws
(B3)
HCD-EC68USB
two screws
(B3)
3-3. PANEL (TOP)
(KTP3 × 10)
screw
panel (top)
two claws
two screws
(BVTP3 × 10)
four screws
(case3 TP)
two screws
(B3)
side panel (R)
screw
(KTP3 × 10)
9
HCD-EC68USB
3-4. MAIN BOARD
MAIN board
RT
two screws
RB
(BVTP3 × 6)
screw
(BVTP3 × 10)
flexible flat cable (27 core)
(CN607)
flexible flat cable (9 core)
(CN605)
connector (CN613)
flexible flat cable (21 core)
(CN608)
connector (CN604)
flexible flat cable (5 core)
(CN603)
connector (CN633)
connector (CN601)
two screws
R
(B3)
3-5. FRONT PANEL BLOCK
screw (BVTP3 × 10)
flexible flat cable (27 core)
(CN607)
flexible flat cable (21 core)
(CN608)
front panel
RE
block
door (CD)
connector (CN613)
harness
RB
(9 core) (CN605)
flexible flat cable
pull the tray by hand.
two screws
RT
(BVTP3 × 10)
gear
flexible flat cable (13 core)
(CN302)
flexible flat cable (27 core)
(CN906)
lever
Turn a gear by a driver
till a lever falls down
to the position of the figure.
10
3-6. BACK PANEL BLOCK
connector (power cord)
(CN053)
screw
(BVTP3 × 10)
connector (CN601)
two screws
(B3)
four screws
(B3)
two screws
(B3)
back panel block
HCD-EC68USB
3-7. 3 CD MECHANISM BLOCK
flexible flat cable (27 core)
(CN202)
3 CD mechanism block
Cut the clamp.
Note: Please do not forget fixation by clamping
when you install the power cord.
flexible flat cable (13 core)
four screws
(BVTP3 × 10)
two tapes
Note: When installing the CD mechanism section,
install two tapes for prevention of noise.
11
HCD-EC68USB
3-8. BASE UNIT
two screws (PTPWHM2.6)
two screws (PTPWHM2.6)
insulator
two springs
(insulator)
insulator
two springs (insulator)
insulator
– Bottom view –
3-9. OP BASE ASSY (KSM-213D)
insulator
CD mechanism block
base unit
Remove four solders.
OP base assy
(KSM-213D)
flexible flat cable (16 core)
(CD board: CN301/optical pick-up block)
CD board
12
3-10. BELT (DLM3A)
position of belt
belt
HCD-EC68USB
cover
belt
two belts (DLM3A)
four screws
13
HCD-EC68USB
SECTION 4
TEST MODE
COLD RESET
The cold reset clears all data including preset data stored in the
memory to initial conditions. Execute this mode when returning
the set to the customer.
Procedure:
1. In the standby status, press the [
on.
2. Press three buttons of [x], [USB] and at last [
ously.
3. When “RESET” appears, the set enters standby status.
] button to turn the power
?/1
] simultane-
?/1
PANEL TEST MODE
Enter The Panel Test Mode
Procedure:
1. In the standby status, press the [
on.
2. Press three buttons of [DISPLAY], [x], and [USB] simultaneously.
3. When the panel test mode is activated, LEDs and segments of
the liquid crystal display are all turned on.
Version Check
Procedure:
1. In the panel test mode (all LEDs and segments of the liquid
crystal display are turned on), press the [FUNCTION] button.
2. On the liquid crystal display, date and version are displayed
“xxxxxxxx”. For example, “1114V102”.
3. From this status, press the [USB] button, and the destination and
model name are displayed. For example, “CE2” and “ESLO–”.
4. To release from this mode, press three buttons of [DISPLAY],
[x], and [USB] simultaneously.
Key Test Mode
Procedure:
1. In the panel test mode (all LEDs and segments of the liquid
crystal display are turned on), press the [DISPLAY] button.
2. The message “KEY0 0 0”displayed. Whenever any buttons
are pressed and the [VOLUME] dial is turned, the value is
changed.
3. To release from this mode, press three buttons of [DISPLAY],
[
], and [FUNCTION] simultaneously.
x
] button to turn the power
?/1
CD REPEAT 5 LIMIT CANCEL MODE
Number of repeats for CD playback is 5 times when the repeat
mode is “REPEAT”. This mode enables CD to repeat playback for
limitless times.
Procedure:
1. Press the [
2. Press the [FUNCTION] button to select CD function.
3. Press three buttons of [DISPLAY], [
ING] simultaneously.
4. It enters the CD repeat 5 limit cancel mode and displays “NO
LIMIT”
5. To release this mode, press the [
off.
] button to turn the power on.
?/1
?/1
], and [
x
l m
] button to turn the power
– TUN-
CD SHIP MODE
This mode can run the CD sled motor optionally. Use this mode,
for instance, when cleaning the optical pick-up.
Procedure:
1. Press the [
2. Confi rm there is no disc in all trays.
3. Press the [FUNCTION] button to select CD function.
4. Press two buttons of [u] and [
5. Set to the CD ship mode. (chucking on)
6. After blink “STANDBY”, “LOCK” is displayed, disconnect
the AC plug.
] button to turn the power on.
?/1
?/1
] simultaneously.
CD TRAY LOCK
This mode is for the antitheft of CD disc in shop. (not for transport)
Procedure:
1. Press the [
2. Press the [FUNCTION] button to select CD function.
3. Insert a disc.
4. While pressing the [
seconds.
5. The message “LOCKED” is displayed and the disc tray is
locked. (Even if exiting from this mode, the disc tray is still
locked)
6. If press the [Z] button to eject the disc, the message “LOCKED”
is displayed and can not eject the disc.
7. To release this lock, while pressing the [
] button for 5 seconds again.
[
Z
8. The message “UNLOCKED” is displayed and the disc tray is
unlocked.
] button to turn the power on.
?/1
] button, press the [Z] button for more 5
x
] button, press the
x
CD POWER MANAGE
This mode is for switch the CD power supply on/off. Even if this
state pulls out AC plug, it is held.
Procedure:
1. Press the [
2. Press the [FUNCTION] button to select CD function.
3. Press the [
4. After pressing the [DISPLAY] button, while pressing the [
button, press the [
5. It turns power on and display “CD POWER”, then display
“ON” or “OFF”.
] button to turn the power on.
?/1
] button again to turn the power off (standby).
?/1
] button.
?/1
x
CHANGE-OVER THE AM TUNING INTERVAL
(Except AEP model)
The AM tuning interval can be changed over 9 kHz or 10 kHz.
Procedure:
1. Press the [
2. Press the [TUNER/BAND] button to select TUNER (AM)
function.
3. Press the [
4. After pressing the [DISPLAY] button, while pressing the
[TUNING +
5. It turns power on and display “9k STEP” or “10k STEP”, and
thus the tuning interval is changed over.
] button to turn the power on.
?/1
] button again to turn the power off (standby).
?/1
M L
] button, press the [
?/1
] button.
CD SHIP AND COLD RESET
Procedure:
1. Press the [
2. Confi rm there is no disc in all trays.
3. Press the [FUNCTION] button to select CD function.
4. Press three buttons of [USB SYNC REC/REC 1], [
– TUNING] and [
5. After blink “STANDBY”, “RESET” is displayed, disconnect
the AC plug.
] button to turn the power on.
?/1
] simultaneously.
?/1
l m
COMMON TEST MODE
Procedure:
1. Press the [
2. Press three buttons of [USB SYNC REC/REC 1], [TUNING +
M L
3. It enters the common test mode and displays “COMMON”.
4. Each time the [VOLUME] dial is turned, “VOL MIN”, “VOL
16”, and “VOL MAX” are displayed.
5. To release from this mode, press three buttons of [USB SYNC
REC/REC 1], [TUNING +
taneously.
] button to turn the power on.
?/1
], and [DISPLAY] simultaneously.
M L
], and [DISPLAY] simul-
]
14
HCD-EC68USB
[CD SERVO TEST MODE]
This mode can check the servo system operations of the optical
pick-up system (= optical unit + CD board).
Note1: Do not enter the [CD SERVO TEST MODE] while any other test
mode is in progress.
Note2: Do not enter any other test mode while the [CD SERVO TEST
MODE] is in progress.
How to Enter the CD Servo Test Mode
Procedure:
1. Press the [
2. Press the [FUNCTION] button to select CD function.
3. Press three buttons of [u], [
[DISPLAY] simultaneously.
4. It enters the CD servo test mode and displays “BDT S CU”.
How to Exit from the CD Servo Test Mode
Procedure:
1. Press three buttons of [u], [
[DISPLAY] simultaneously.
2. It releases from the CD Servo Test Mode and returns to the
ordinary CD function.
Key Operation:
[
+], [ –]:
Use these keys to move between the fi ve modes
[DSGX] , [EQ]:
Use these keys to move between the different layers
[TUNING +
Use these keys to move the cursor to the right digit
Press [TUNING +
] button to turn the power on.
?/1
l m
l m
– TUNING] and
– TUNING] and
contained in the CD Servo Test Mode, that are the
S-Curve Mode, the RAM Read Mode, the RAM
Write Mode, the Command Out Mode and the Error
Rate Mode as described below. Also, use these keys
to move between the menus within the respective
fi ve modes. When [
+] is pressed, the screen advances to the next menu or to the next mode. When
[ –] is pressed, the screen returns back to the
previous menu or to the previous mode. Use these
keys also to increase or decrease the numeric value
when changing the numeric value. Pressing [ +]
increases the value and pressing [ –] decreases
the value.
of the hierarchy of the CD Servo Test Mode shown
below. Press [DSGX] to move down to the lower
layer, and press [EQ] to move up to the higher layer.
M L
], [
l m
– TUNING]:
or to the left digit in the six-digit number, when
changing the numeric value.
M L
to the right, and press [
] to move the cursor
l m
– TUNING] to
return the cursor to the left.
CD Servo Test Mode Tree:
S Curve Mode LD ON
(BDT S CU) (LD ON)
RAM Read Mode
(BDTRAM R) (DISCTYPE) (AL: 0000, RW: 0001)
Gain Index value indication
(GAININDX) (0001)
RFO GAIN value indication
(RFO_GAIN) (0009)
FEO GAIN value indication
(FEO_GAIN) (0005)
SBAD GAIN value indication
(SBAD_GAI) (0007)
TEO GAIN value indication
(TEO_GAIN) (000A)
Disc Size value indication
(DISCSIZE) (0000: Non disc, 0001: 8cm,
0002: 12cm)
(OPABRKER) (0000)
SBBT Data value indication
(SBBT DAT) (006C)
FEOOCD value indication
(FEOOCD) (0440)
RAM Write Mode
(BDTRAM W) (00 SPG) (Non mask:00, Mask:01)
Fix RF Gain value edit
(00 FIX) (Non Fix:00, AL Fix:01, RW Fix:02)
TMAX ON value edit
(00 TMA)
Driver Mute OFF value edit
(00 D_M) (Normal:00, Forced OFF:01)
Command Out Mode
(BDT COMO) (COMOUT6X) (000000) (OK)
READ2X value edit command out
(READ2X) (60) (50)
REG READ value edit command out
(REG_READ) (00) (0000)
FEBC? command out
(FEBC?) (00)
FGADD? command out
(FGADD?) (10)
TEBC? command out
(TEBC?) (00)
TGADD? command out
(TGADD?) (00)
RFGC? command out
(RFGC?) (00)
FEOF? command out
(FEOF?) (FFC0)
TEOF? command out
(TEOF?) (FFC0)
TEIOCD1? command out
(TEIOCD1?) (FE80)
TEIOCD2? command out
(TEIOCD2?) (FF40)
TEIOCD3? command out
(TEIOCD3?) (FFC0)
TEOOCD? command out
(TEOOCD?) (FD00)
FEOOCD? command out
(FEOOCD?) (F780)
MONITOR value edit command out
(MONITOR) (570A00) (OK)
Error Rate Mode Error rate indication
(BDT ERR) (00000000)
Higher layer Lower layer of menu hierarchy
Disc Type value indication
Op ABRAKE Error
SPG Mask value edit
COMOUT6X value edit command out
value indication
[FUNCTION]:
Use this key to execute Command Out in the Com-
mand Out Mode.
15
HCD-EC68USB
CD SERVICE MODE
This mode can move the SLED of the optical pick-up, and also can
turn the optical pick-up laser power on and off.
Procedure:
1. Press the [
2. Press three buttons of [u], [TUNING +
DISPLAY simultaneously.
3. Press the [FUNCTION] button to select CD function.
4. It enters the CD service mode and displays “SERVICE”.
5. To exit from this mode, press three buttons of [u], [TUN-
ING +
Key Operation:
[TUNING +
Use these keys to move the SLED. When [TUN-
When [
[DISPLAY]:
Use this key to turn the optical pick-up laser power
] button to turn the power on.
I/1
M L
M L
] and DISPLAY simultaneously.
M L
], [
l m
ING +
M L
moves to outer circumference and the message
“SLED OUT” is displayed.
l m
mode, the SLED moves to inner circumference and
the message “SLED IN” is displayed.
on and off. When the laser power is turned on, the
message “LD ON” is displayed. When the laser
power is turned off, the message “LD OFF” is displayed.
– TUNING]:
] is pressed in this mode, the SLED
– TUNING] is pressed in this
], and
CD ERROR CODE
The past errors of the CD mechanism (CDM) are displayed as the
CDM Errors, and those of the optical pick-up system (= optical
unit + CD board) are displayed as the BD Errors as shown below.
Procedure:
1. Press the [
2. Press the [FUNCTION] button to select CD function.
3. Press three buttons of [TUNING +
PLAY] simultaneously.
4. Then, the CDM error code is displayed as “M0xxxxxx” (x
means hexadecimal number) on the liquid crystal display as
shown below.
5. Every pressing of the [TUNING +
mode increments the number after “M” starting from “M0” up
to “M9”, and then returns to “M0”. Every pressing of the [
m
– TUNING] button in this mode decrements the number
after “M”. The smaller the error code number is, the newer the
error content is.
6. When the [USB SYNC REC/REC 1] button is pressed then,
the BD error code is displayed as “D0xxxxxx” (x means hexadecimal number) on the liquid crystal display as shown below.
In the same way as the CDM error code, use of the [TUNING
+
M L
mode enables tracing of the error history.
7. To release from this mode, press the [
power off.
] button to turn the power on.
I/1
] and the [
l m
– TUNING] buttons in this
M L
M L
], [x] and [DIS-
] button in this
] button to turn the
I/1
l
Contents of “CDM Errors”
Error display example
M 0 FF 11 42
1 2 3 4
1 It indicates the error history number
0 to 9: The error code number 0 indicates the newest error.
2 It indicates whether the CDM error occurs in the normal opera-
tions or during the initialization operation.
FF : The error has occurred in the normal opera-
tions.
Other than FF : The error has occurred during the initialization
operation.
3 It indicates the processing during which the trouble has oc-
curred.
01: The disc EJECT processing is in progress.
02: The disc INSERTION-WAITING processing is in prog-
ress.
03: Processing of the disc INSERTION-REQUEST for the up-
per CD tray is in progress.
04: Processing of the disc EJECTION-REQUEST for the up-
per CD tray is in progress.
05: The disc pulling-in operation is in progress.
06: The disc chucking processing is in progress.
07: The disc re-chucking processing is in progress.
08: The disc chucking-release completion operation is in prog-
ress.
4 It indicates the operation during which the trouble has oc-
curred.
00 : Waiting for the operation.
10 to 13 : The disc EJECT operation is in progress.
20 : The disc pulling-in operation is in progress.
30 : The disc chucking-release operation is in progress.
40 to 43 : The disc EJECT operation due to error is in prog-
ress.
Contents of “BD Errors”
Error display example
0 02 09
D
1 2 3 4
1 It indicates the error history number
0 to 9: The error code number 0 indicates the newest error.
2 It indicates the error content
01: The focus servo cannot lock-in.
02: GFS is no good (NG).
03: The startup time exceeds the specifi ed period of time (time
over)
04: The focus servo is unlocked continuously.
05: Q code cannot be obtained within the specifi ed period of
time.
06: The tracking servo cannot lock-in.
07: Blank disc
01
16
HCD-EC68USB
3 It indicates the on-going processing of optical pick-up system
(= optical unit + BD board) when the trouble has occurred.
01: The CD SHIP mode processing is in progress.
02: The POWER OFF processing is in progress.
03: The INITIALIZE processing is in progress.
04: The optical pick-up system (= optical unit + BD board) is
in the stop state.
05: The STOP operation is in progress.
06: The startup processing is in progress.
07: The TOC read-in processing is in progress.
08: The SEARCH operation is in progress.
09: The PLAY operation is in progress.
0A: The PAUSE operation is in progress.
0B: The PLAY – MANUAL SEARCH operation is in prog-
ress.
0C: The PAUSE – MANUAL SEARCH operation is in prog-
ress.
4 It indicates the operation that is being processed when the trou-
ble has occurred.
It indicates the step number of each processing specifi ed by 3.
Because the numbers of steps are different in each processing,
this number is different in each processing.
CD FACTORY MODE
Note1: Do not enter the [CD FACTORY MODE] while any other test-
mode is in progress.
Note2: Do not enter any other test mode while the [CD FACTORY
MODE] is in progress.
Key Operation:
[DISPLAY]:
The display changes in the following order when-
ever the button is pressed.
[DSGX]:
RF gain setting changes whenever the button is
“–”: No gain fi xation.
“AL”: Fix to the gain for AL disc.
“RW”: Fix to the gain for RW disc.
[EQ]:
Tracking servo setting changes whenever the but-
“ON”: Tracking servo ON.
“OFF”: Tracking servo OFF.
[FUNCTION]:
S character mode setting changes whenever the but-
“ ”: S character mode OFF.
“S”: S character mode ON.
(Initial display)
fcsAG ** (**: Focus AGC value)
trkAG ** (**: Track AGC value)
RF-AG ** (**: RF AGC value)
pressed.
ton is pressed.
ton is pressed.
Procedure:
1. Press the [
2. Press the [FUNCTION] button to select CD function
3. Press three buttons of [u], [USB], and [DISPLAY] simulta-
neously.
4. It enters the CD factory mode and displays the following message.
] button to turn the power on.
?/1
–X1ON
S character mode setting
Tracking servo setting
RF gain setting
5. To release from this mode, press the [
power off.
] button to turn the
?/1
17
HCD-EC68USB
SECTION 5
ELECTRICAL ADJUSTMENTS
CD SECTION
Note:
1. CD Block is basically constructed to operate without adjustment.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10 MΩ impedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specifi ed value with the following checks.
5. Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
oscilloscope
(DC range)
CD board
TP121 (RFI)
TP124 (VC)
+
–
Procedure :
1. Connect the oscilloscope to TP121 (RFI) and TP124 (VC) on
the CD board.
2. Press the [
] button to turn the power ON, and press the [Z]
?/1
button to open the CD disc tray.
3. Set disc (YEDS-18) on the trey and press the [u] button to
playback.
4. Confi rm that oscilloscope waveform is as shown in the fi gure
below. (eye pattern)
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TUNER SECTION
0 dB = 1 μV
[AM]
Setting:
FUNCTION: AM
loop antenna A
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: 54 dBuV
MAIN board
ANTENNA
CN801 pin
[FM]
Setting:
FUNCTION: FM
FM RF signal
generator
0.01 F
75kHz frequency
deviation by 1K Hz
signal
Output level: as low as possible
(8dBuV)
MAIN board
ANTENNA
CN801 pin
60 cm
loop antenna B
set
MAIN board
ANTENNA
CN801 pin
set
level meter
32 Ω
JACK board
PHONES jack (J492)
32 Ω
JACK board
PHONES jack (J492)
+
–
level meter
+
–
Checking Location:
– CD Board (Conductor Side) –
TP124
(VC)
TP121
(RFI)
IC101
level:
1.2 ± 0.3 Vp-p
digital voltmeter
MAIN board
IC801 pin XL (TUNER VT)
100 kΩ
• Repeat the procedures in each adjustment several times.
18
HCD-EC68USB
HCD-EC68USB
1919
AM FREQUENCY COVERAGE ADJUSTMENT
(Except AEP model)
Adjustment Part Frequency Display
Reading on Digital
Voltmeter
L801 530 kHz 1.5 ± 0.1 V
Confi rmation 1,710 kHz 8 ± 0.5 V
AM FREQUENCY COVERAGE ADJUSTMENT (AEP model)
Adjustment Part Frequency Display
Reading on Digital
Voltmeter
L801 531 kHz 1.5 ± 0.1 V
Confi rmation 1,602 kHz 7.2 ± 0.5 V
AM TRACKING ADJUSTMENT (Except AEP model)
Adjust for a maximum reading on level meter
L805 530 kHz
AM TRACKING ADJUSTMENT (AEP model)
Adjust for a maximum reading on level meter
L805 531 kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display
Reading on Digital
Voltmeter
L803 87.5 kHz 1.75 ± 0.1 V
Confi rmation 108 kHz 6.2 ± 0.5 V
FM TRACKING ADJUSTMENT
Adjust for a minimum reading on level meter
L804 98 MHz
Adjustment Location: MAIN board
FM DETECTOR ADJUSTMENT
Setting:
FUNCTION: FM
1. Turn the set to 98 MHz.
2. Adjust L802 so that modulation distortion may become the
best in the vicinity of the maximum value where the tuner out
level becomes –15dBuV or more.
FM AUTO STOP CHECK
generator
SET
+
75 Ω
Procedure :
1. Turn the power on.
2. Input the following signal from Signal Generator to FM antenna input directly.
* Carrier Freq : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation : 75 kHz
Modulation : 1 kHz
ANT input : 35 dBu (EMF)
Note: Please use 75 ohm “coaxial cable” to connect SG and the set. You
cannot use video cable for checking.
Please use SG whose output impedance is 75 ohm.
3. Set to FM tuner function and scan the input FM signal with
automatic scanning.
4. Confi rm that input Frequency of A, B and C detected and auto-
matic scanning stops.
The stop of automatic scanning means “The station signal is received in good condition”.
Adjustment Location and Connecting Points:
– MAIN Board (Component Side) –
L801
L804
AM Tracking
Adjustment
FM Frequency
Coverage Adjustment
L802
FM Detector
Adjustment
L803
FM Frequency
Coverage Adjustment
L805
AM Tracking
Adjustment
– MAIN Board (Conductor Side) –
3
CN801
ANTENNA
1
36
IC801
1
IC801 pin RT
(TUNER OUT L-ch)
IC801 pin XL
(TUNER VT)
19
18
JW801
(TUNER-GND)
FM RF signal
generator
Carrier frequency: 98MHz
Modulation:
deviation by FM 75 kHz
Output level: 60 dBuV
MAIN board
ANTENNA
CN801 pin
set
MAIN board
ANTENNA
CN801 pin
MAIN board
IC801 pin RT
(TUNER OUT L-ch)
level meter
+
–
MAIN board
JW801 (TUNER-GND)
HCD-EC68USB
HCD-EC68USB
2020
6-1. BLOCK DIAGRAM - CD SERVO, TUNER Section -
SECTION 6
DIAGRAMS
OPTICAL PICK-UP BLOCK
(KSM-213DCP)
B
C
D
E
A
F
SP+
SP-
LD
PD
VC
AUTOMATIC
POWER
CONTROL
Q301
FOCUS/TRACKING COIL DRIVE,
SLED/SPINDLE MOTOR DRIVE
IC401
CD-MP3 PROCESSOR
IC101
VO1+2
VO1-
1
IN1
3
SL+
SL-
VO2-
12
VO2+
11
IN2’
9
T+
T-
VO3+
18
VO3-
17
IN3’
20
F+
F-
CD MECHANISM
DECK
M1-
M2+
M2-
M1+
VO4+
26
VO4-
27
IN4’
24
MUTE 7
97 FPi1 (B)
94 FNi2 (C)
96 FPi2 (D)
100
TNi (E)
95 FNi1 (A)
98 TPi (F)
91 LDo
MDi
84 VRo
13 DMo
92
12 FMo
10 TRo
9FOo
XO
XI
X102
16.9344MHz
S201
(LIMIT)
24
23
IO0 (/HSO)
20
LO CD-L30
RO R-CH
27
BUS0 38
BUS1
39
I/O-CD-BUS0
17
I/O-CD-BUS1
18
BUS2 (SO)
40
BUS3 (SI)
41
I/O-CD-BUS2
19
I/O-CD-BUS3
20
O-CD-BUCK
25
O-CD-CCE
26
XRST
37 O-CD-RST27
O-DR-MUTE
23
I-REQ
24
SBSY
54
O-3CD-M1+/O-CDM-M1+
8
O-3CD-M1-/O-CDM-M1- 10
O-3CD-M2+/NC
11
O-3CD-M2-/NC 12
O-CD-SBSY
43
B
A
MOTOR
DRIVE
Q311 - 318
SW3
SW2
I-CHACK
SW1
I-3CD-SW1/O-CDM-OPEN
7
I-3CD-SW3/O-CDM-CLOSE
5
I-3CD-SW2/NC
6
I-3CD-CHACK
21
I-STOCK
I-OPEN
I-CLOSE
I-3CD-STOCK
22
I-1CD-CLOSE_OPEN/NC 48
AM/FM-DET, OSC, MIX, PLL, IF AMP
IC801
36
FM RF-IN
8
FM IF-IN
22
MPX-IN
1
AM RF-IN
31
AM-OSC
33
I-TU-DO
56
O-TU-CLK
55
O-TU-CE
57
O-TU-DI
39
I-TU-ANSD
X801
75kHz
2019
XIN
XOUT
16DI17CL15
CE
18DO25
AGC
3
CN801
ANTENNA
FM/AM
1
BAND-PASS
FILTER
FL803
AM
TRACKING
L805
AM FREQUENCY
COVERAGE
L801
D801
7
AM IF-IN
T801
AM IF
34
FM RF-OUT
FM
TRACKING
L804
32
FM-OSC
FM FREQUENCY
COVERAGE
L803
+9V
11
FM-DET
FM
DETECTOR
L802
3FM-MIX 23FM DET-OUT 12L-OUT
13
R-OUT R-CH
TUNER-L
5
AM-MIX
24
AM DET-OUT
CF801
• SIGNAL PATH
: AM
: CD PLAY
• R-ch is omitted due to same as L-ch.
: FM
SYSTEM CONTROLLER
IC301 (1/3)
Q301
40 O-USB-SEL1_2/O-SW-ON/I-TP-STATE
BUS1
BUS0
BUS2
BUS3
BUCK
BUS0 – BUS3,
BUCK, CCE, REQ
DATA SELECTOR
IC303
SELECT
42BUCK (CLK) 4
2
3
CCE
43XCCE
48PIO0
7
5
REQ
6
12
14
13
9
10
11
1
BUS
SWITCH
IC301
BUS
SWITCH
IC302
D
65AIN (PI4)
66BCKi (PI5)
BCK
A-IN
67LRCKi (PI6)
LRCK
51PIO3
GATE
49PIO1
ST-REQ
C
DATA, CLOCK,
A-IN, BCK, LRCK,
GATE, ST-REQ
47AOUT2 (PO5)
63BCK (PO8)
CLOCK
DATA
(Page
22)
(Page 21)
(Page 21)
(Page 22)
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