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SERVICE MANUAL
Ver. 1.0 2008.02
HCD-EC68/EC78
AEP Model E Model
HCD-EC68/EC78
UK Model Australian Model
HCD-EC68
· HCD-EC68 is the amplifier, CD player, tape deck (except UK model) and tuner section in MHC-EC68. · HCD-EC78 is the amplifier, CD player, tape deck and tuner section in MHC-EC78.
Photo : HCD-EC78
CD Section Tape deck Section (EXCEPT EC68: UK)
Model Name Using Similar Mechanism Mechanism Type Optical Pick-up Block Name Model Name Using Similar Mechanism Tape Transport Mechanism Type
NEW CDM88A-K6BD90-WOD KSM-213DCP HCD-EC77 TCM-J1 or CS-21SC-900TP
SPECIFICATIONS
section HCD-EC78
European and Russian models: Power output (rated): Low channel 55 W + 55 W (at 8 , 1 kHz, 1% THD) High channel 55 W + 55 W (at 8 , 8 kHz, 1% THD) RMS output power (reference): Low channel 75 W + 75 W (per channel at 8 , 1 kHz, 10% THD) High channel 75 W + 75 W (per channel at 8 , 8 kHz, 10% THD) Other models: Power output (rated): Low channel 50 W + 50 W (at 8 , 1 kHz, 1% THD) High channel 50 W + 50 W (at 8 , 8 kHz, 1% THD) RMS output power (reference): Low channel 70 W + 70 W (per channel at 8 , 1 kHz, 10% THD) High channel 70 W + 70 W (per channel at 8 , 8 kHz, 10% THD) Power output (rated): 50 W + 50 W (at 6 , 1 kHz, 1% THD) RMS output power (reference): 70 W + 70 W (per channel at 6 , 1 kHz, 10% THD)
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 Australian, Pan-American models: 530 1,710 kHz (with 10 kHz tuning interval) 531 1,710 kHz (with 9 kHz tuning interval) European and Russian models: 531 1,602 kHz (with 9 kHz tuning interval) Other models: 530 1,610 kHz (with 10 kHz tuning interval) 531 1,602 kHz (with 9 kHz tuning interval) Intermediate frequency: 450 kHz
Inputs
AUDIO IN (stereo mini jack): Sensitivity 800 mV, impedance 22 kilohms
Outputs
PHONES (stereo mini jack): Accepts headphones with an impedance of 8 or more SPEAKER: impedance HCD-EC78: 8 HCD-EC68: 6
CD player section
System: Compact disc and digital audio system Laser: Semiconductor laser (=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
Tape deck section (except for the UK model)
Recording system: 4-track 2-channel, stereo
HCD-EC68
European and Russian models (except for the UK model): Power output (rated): 50 W + 50 W (at 6 , 1 kHz, 1% THD) RMS output power (reference): 70 W + 70 W (per channel at 6 , 1 kHz, 10% THD) Power output (rated): 55 W + 55 W (at 6 , 1 kHz, 1% THD) RMS output power (reference): 75 W + 75 W (per channel at 6 , 1 kHz, 10% THD) Other models:
Continued on next page
COMPACT DISC DECK RECEIVER COMPACT DISC RECEIVER
EXCEPT HCD-EC68: UK MODEL HCD-EC68: UK MODEL
9-889-007-01
2008B05-1 © 2008.02
Sony Corporation
Audio Business Group Published by Sony Techno Create Corporation
HCD-EC68/EC78
General Power requirements:
European and Russian models: AC 230 V, 50/60 Hz Mexican model: AC 127 V, 60 Hz Argentine model: AC 220 V, 50/60 Hz Australian model: AC 230 240 V, 50/60 Hz Other models: AC 120, 220 or 230 240 V, 50/60 Hz, adjustable with voltage selector
TABLE OF CONTENTS
1. 2. 3.
SERVICING NOTES ............................................. GENERAL .................................................................. DISASSEMBLY
3 6
Power consumption: HCD-EC78
European and Russian models: 160 W 0.5 W (in Power Saving Mode) Mexican model: 160 W Other models: 150 W
HCD-EC68
European and Russian models (except for the UK model): 100 W 0.5 W (in Power Saving Mode) Other models: 100 W
Dimensions (w/h/d) (excl. speakers):
Approx. 200 × 306 × 415 mm
Mass (excl. speakers): HCD-EC78
European and Russian models: Approx. 6.0 kg Other models: Approx. 6.3 kg
3-1. Disassembly Flow ........................................................... 3-2. Side Panel (L)/(R) ........................................................... 3-3. Top Panel (EC68: UK model)/Top Panel Block (Except EC68: UK model) .............................................. 3-4. Tape Mechanism Deck (Except EC68: UK model) ........ 3-5. MAIN Board ................................................................... 3-6. Front Panel Section ......................................................... 3-7. Back Panel Block ............................................................ 3-8. CD Mechanism Block ..................................................... 3-9. BU Block ........................................................................ 3-10. OP Base Assy (KSM-213D) ...........................................
8 9 9 10 10 11 11 12 12 13
HCD-EC68
European and Russian models (except for the UK model): Approx. 5.3 kg Other models: Approx. 5.3 kg
4. 5. 6. 7.
TEST MODE ............................................................ 14 MECHANICAL ADJUSTMENTS ...................... 18 ELECTRICAL ADJUSTMENTS ........................ 18 DIAGRAMS
24 25 26 26 27 28 29 30 30 31 31 32 32 33 34 34 35 36
Notes on chip component replacement · Never reuse a disconnected chip component. · Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing · Keep the temperature of soldering iron around 270 °C during repairing. · Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). · Be careful not to apply force on the conductor when soldering or unsoldering.
CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
This appliance is classified as a CLASS 1 LASER product. This marking is located on the rear exterior.
7-1. Printed Wiring Board - CD Board - ................................ 7-2. Schematic Diagram - CD Board - ................................... 7-3. Printed Wiring Board - DECK Board (Except EC68: UK model) - .................. 7-4. Schematic Diagram - DECK Board (Except EC68: UK model) - .................. 7-5. Printed Wiring Board - MAIN Board - ........................... 7-6. Schematic Diagram - MAIN Board (1/2) - ..................... 7-7. Schematic Diagram - MAIN Board (2/2) - ..................... 7-8. Printed Wiring Board - HI AMP Board (EC78) - ........... 7-9. Schematic Diagram - HI AMP Board (EC78) - .............. 7-10. Printed Wiring Board - LOW AMP Board - ................... 7-11. Schematic Diagram - LOW AMP Board - ...................... 7-12. Printed Wiring Board - PANEL Board (Suffix-12) - ...... 7-13. Printed Wiring Board - PANEL Board (Suffix-13) - ...... 7-14. Schematic Diagram - PANEL Board - ............................ 7-15. Printed Wiring Boards - KEY Section - .......................... 7-16. Schematic Diagram - KEY Section - .............................. 7-17. Printed Wiring Board - PT Board - ................................. 7-18. Schematic Diagram - PT Board - ....................................
8.
8-1. 8-2. 8-3. 8-4. 8-5. 8-6.
EXPLODED VIEWS
Panel Section................................................................... Tape Deck Section (Except EC68: UK).......................... Front Panel Section ......................................................... Chassis Section ............................................................... Main Section ................................................................... CD Mechanism Section (CDM88A-K6BD90-WOD) .... 44 45 46 47 48 49
9.
ELECTRICAL PARTS LIST .............................. 50
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
HCD-EC68/EC78 SECTION 1 SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care. NOTES ON LASER DIODE EMISSION CHECK The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens. 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. 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 [I/1] button to turn the power on. 2. Press the [FUNCTION] button to select CD function. 3. While pressing the [x] button, press the [Z] button for more 5 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 [I/1] button.
103S
MODEL IDENTIFICATION Back Panel
MODEL NUMBER LABEL
Model EC68: AEP model EC68: 120V AC area in E, Chilean and Peruvian models EC78: AEP model EC78: 120V AC area in E, Chilean and Peruvian models EC68: Russian model EC68: UK model EC68: 240V AC area in E model EC68: Australian model EC68: Mexican model EC68: Argentina model EC78: Russian model EC78: 240V AC area in E model EC78: Mexican model EC78: Argentina model
Part No. 3-296-777-0[] 3-296-779-0[] 3-296-780-0[] 3-296-782-0[] 3-398-081-0[] 3-398-082-0[] 3-398-083-0[] 3-398-084-0[] 3-398-085-0[] 3-398-086-0[] 3-398-088-0[] 3-398-090-0[] 3-398-091-0[] 3-398-092-0[]
SUFFIX-12/SUFFIX-13 BOARD
DISCRIMINATION
OF
PANEL
PANEL Board (Component Side)
LCD301 CN304
Suffix-12 : 1-875-490-12 Suffix-13 : 1-875-490-13
S301
3
HCD-EC68/EC78
HOW TO OPEN THE TRAY WHEN POWER SWITCH TURN OFF
door (CD) pull the tray by the hand.
lever
gear Turn a gear by a driver till a lever falls down to the position of the figure.
HOW TO REMOVE THE KNOB (VOL)
knob (VOL) front panel block (back view)
hole Push the knob (VOL) by the flat head driver.
4
HCD-EC68/EC78
CAPACITOR DISCHARGE FOR ELECTRIC SHOCK PREVENTION
In checking the MAIN board, make a capacitor discharge of C622, C676, C677 and C678 for electric shock prevention. 800 /2W C626 (EC68/EC78: E2, E3, E51, MX, AR), C678 (EC78: AEP, RU) MAIN board
C622 (EC68/EC78: E2, E3, E51, MX, AR), C677 (EC78: AEP, RU) MAIN board
800 /2W · Abbreviation AR : Argentina model E2 : 120V AC area in E model E3 : 240V AC area in E model E51 : Chilean and Peruvian models MX : Mexican model RU : Russian model
HOW TO DISTINGUISH TAPE MECHANISM DECK (EXCEPT EC68: UK MODEL) Two kinds of tape mechanism decks installed by this set exist. Please do the repair exchange after confirming which tape mechanism deck set of the repair according to how to distinguish the figure below.
tape deck Tape Deck Name motor Metal part: TCM-J1 Mold part: CS-21SC-900TP TCM-J1 CS-21SC-900TP Tape Deck Part No. A-1527-851-A 1-797-575-11 Belt Part No. 2-670-389-01 BELT (1) 3-214-817-01 BELT (FR) 2-688-621-01 BELT (R/F) 2-688-622-01 BELT (MAIN)
5
HCD-EC68/EC78 SECTION 2 GENERAL
Basic Operations
*
This section is extracted from instruction manual.
Selecting a music source
Press the following buttons (or press FUNCTION repeatedly).
To select CD Press CD .
Compatibility with all MP3 encoding/writing software, recording device, and recording media cannot be guaranteed. Incompatible MP3 discs may produce noise or interrupted audio or may not play at all.
Using optional audio components
Connect headphones to the PHONES jack on the unit.
Notes on playing multisession discs
If the disc begins with a CD-DA (or MP3) session, it is recognized as a CD-DA (or MP3) disc, and playback continues until another session is encountered. A disc with a mixed CD format is recognized as a CD-DA (audio) disc.
To connect an optional headphones
Tuner Tape1) Component2) (connected using an audio cord)
1)
TUNER/BAND . TAPE . FUNCTION repeatedly until "AUDIO IN" appears.
To connect an optional component
Connect additional audio source components to the AUDIO IN jack on the unit using an analog audio cord (not supplied). Turn down the volume on the system, and then select the AUDIO IN function.
Listening to the radio
1 Select "TUNER FM" or "TUNER AM."
Press TUNER/BAND repeatedly.
Except for the UK model. 2) If the component has the AVLS (Automatic Volume Limiter System) or BASS BOOST function, turn off the function to avoid distorted sound from the speakers.
2 Select the tuning mode.
Press TUNING MODE repeatedly until "AUTO" appears.
Adjusting the sound
To adjust the volume
Press VOLUME +/ (or turn the VOLUME control on the unit) .
3 Tune in the desired station.
Press +/ (or TUNING +/ on the unit) . Scanning stops automatically when a station is tuned in, and then "TUNED" and "ST" (for stereo programs) appear.
To add a sound effect
* Except for the UK model
To Generate a more dynamic sound (Dynamic Sound Generator X-tra)
Press DSGX on the unit.
To stop automatic scanning
EQ . Press (stop) .
Set the sound effect
To tune in a station with a weak signal
Playing a CD/MP3 disc
1 Select the CD function.
Press CD (or FUNCTION repeatedly) .
If "TUNED" does not appear and the scanning does not stop, press TUNING MODE repeatedly until "MANUAL" appears, and then press +/ (or TUNING +/ on the unit) repeatedly to tune in the desired station.
2 Place a disc.
Press (open/close) on the unit, and place a disc with the label side up on the disc tray. To place additional discs, slide the disc tray with your finger as shown below. To close the disc tray, press (open/close) on the unit. Do not force the disc tray closed with your finger, as this may damage the unit.
Press FM MODE repeatedly until "MONO" appears to turn off stereo reception.
To reduce static noise on a weak FM stereo station
Playing a tape (Except for the UK model)
1 Select a tape function.
Press TAPE (or FUNCTION repeatedly) .
2 Insert a tape.
This manual mainly explains operations using the remote, but the same operations can also be performed using the buttons on the unit having the same or similar names. Press (stop/eject) on the unit, and insert the tape into the cassette holder. Make sure there is no slack in the tape to avoid damaging the tape or the tape deck.
3 Start playback.
Press (play) on the unit.
Before using the system
To use the remote
Slide and remove the battery compartment lid , and insert the two R6 (size AA) batteries (supplied), side first, matching the polarities shown below.
3 Select a disc.
If the discs are currently stopped, press DISC SKIP . To change discs while in other functions, press DISC 1 3 on the unit.
To Pause playback
Press (pause) on the unit. To resume play, press the button again.
4 Start playback.
Press (play) (or CD (play) on the unit) . To exchange other discs during playback, press EX-CHANGE on the unit.
To Pause playback Press (pause) . To resume play, press the button again.
Stop playback Rewind or fast forward*
(stop/eject) on the unit. / (rewind/fast forward) on the unit.
* Be sure to press (stop/eject) on the unit after the tape has been wound or rewound to the end.
Note
Do not turn off the system during playback or recording.
Stop playback
Notes on using the remote
With normal use, the batteries should last for about six months. Do not mix an old battery with a new one or mix different types of batteries. If you do not use the remote for a long period of time, remove the batteries to avoid damage from battery leakage and corrosion. Batteries installed devices shall not be exposed to excessive heat such as sunshine, fire or the like.
(stop) . (select folder) +/ . / (go back/go forward) (or / on the unit) . Hold down / (rewind/fast forward) during playback, and release the button at the desired point. REPEAT repeatedly until "REP" or "REP1" appears.
Select a folder on an MP3 disc Select a track or file Find a point in a track or file
Changing the display
To Change information on the display* Change Display mode (See below.) Press DISPLAY repeatedly when the system is turned on.
DISPLAY repeatedly when the system is turned off.
To set the clock
Select Repeat Play
1 Turn on the system.
Press (on/standby) to turn on the system.
2 Select the clock set mode.
Press CLOCK/TIMER SET . The hour indication flashes. If "PLAY SET" flashes, press / repeatedly to select "CLOCK," and then press ENTER .
3 Set the time.
Press / repeatedly to set the hour, then press ENTER . The minute indication flashes. Use the same procedure to set the minutes.
Note
The clock settings are lost when you disconnect the power cord or if a power failure occurs.
Press PLAY MODE repeatedly while the player is stopped. You can select normal play (no display for all discs or "1 DISC" for a disc or " " for all MP3 files in the folder on the disc), shuffle play ("SHUF" for all discs shuffle, "1 DISC SHUF" for one disc shuffle SHUF*" for folder shuffle), or program play or " ("PGM").
* When playing a CD-DA disc, (SHUF) Play performs the same operation as 1 DISC (SHUF) Play.
To change the play mode
* For example, you can view CD/MP3 disc information, such as; track or file number during normal play. track or file name (" ") during normal play. artist name (" ") during normal play. album or folder name (" ") during normal play. total playing time while the player is stopped.
The system offers the following display modes.
Display mode Power Saving Mode1) When the system is off, The display is turned off to conserve power. The timer and clock continue to operate. The clock is displayed.
Clock2)
1) 2)
Notes on Repeat Play
All tracks or files on a disc are played repeatedly up to five times. You cannot select "REP" and "SHUF" (all discs shuffle) at the same time. "REP1" indicates that a single track or file is repeated until you stop it.
You cannot set the clock in Power Saving Mode. The clock display automatically turns to Power Saving Mode after eight seconds.
Notes on the display information
Characters that cannot be displayed appear as "_". The following are not displayed; total playing time for an MP3 disc. remaining playing time for an MP3 file. The following are not displayed correctly; elapsed playing time of an MP3 file encoded using VBR (variable bit rate). folder and file names that do not follow either the ISO9660 Level 1, Level 2 or Joliet in the expansion format. The following are displayed; total playing time for a CD-DA disc when the play mode is "1 DISC". remaining playing time for a track. ID3 tag information for MP3 files when ID3 version 1 and version 2 tags are used (ID3 version 2 tag information display has priority when both ID3 version 1 and version 2 tags are used for a single MP3 file). up to 15 characters of ID3 tag information using uppercase letters (A to Z), numbers (0 to 9), and symbols (`< > * + , / @ [ \ ] _).
Notes on playing MP3 discs
Do not save other types of tracks or files or unnecessary folders on a disc that has MP3 files. Folders that have no MP3 files are skipped. MP3 files are played back in the order that they are recorded onto the disc. The system can only play MP3 files that have a file extension of ".MP3". If there are files on the disc that have the ".MP3" file extension, but that are not MP3 files, the unit may produce noise or may malfunction. The maximum number of: folders is 150 (including the root folder). MP3 files is 255. MP3 files and folders that can be contained on a single disc is 300. folder levels (the tree structure of files) is eight.
6
HCD-EC68/EC78
Other Operations
Creating your own CD program (Program Play)
Use buttons on the remote to create your own program.
Recording onto a tape (Except for the UK model)
Use a TYPE I (normal) tape only. You can record just the portions you like from a sound source, including connected audio components. Use buttons on the unit to control tape recording.
1 Press CD to select the CD function. 2 Press PLAY MODE repeatedly until "PGM" appears
while the player is stopped.
1 Insert a recordable tape into the cassette holder
with the side you want to record facing up.
3 4 Press / (or / on the unit)
Press DISC SKIP to select a disc.
2 Prepare the recording source.
Select the desired source to record. Place the disc you want to record and press DISC SKIP to select a disc. When recording a folder from an MP3 disc, press PLAY MODE repeatedly to select " ," and then +/ repeatedly to select the desired press folder. To record only your favourite CD tracks or MP3 files in your desired order, perform steps 2 to 5 of "Creating your own CD program."
repeatedly until the desired track number appears. +/ When programming MP3 files, press repeatedly to select the desired folder, and then select the desired file.
Selected track or file number
3 Start recording.
Total playing time of the selected track
5 Press ENTER to add the track or file to the
program.
6 Repeat steps 3 through 5 to program additional
tracks or files, up to a total of 25 tracks or files.
Press (record) , and then start playing the desired recording source. The CD starts playing automatically after 10 seconds have passed. If there is noise while recording from the tuner, reposition the appropriate antenna to reduce the noise. While recording, you cannot listen to other sources.
7 To play your program of tracks or files, press (or
To stop recording
Press .
Tip
CD on the unit) . The program remains available until you open the disc tray. To play the same program again, select the CD function, and then press (or CD on the unit) .
We recommend that you press first, and then press to avoid noise being recorded when you stop recording.
Press PLAY MODE repeatedly until "PGM" disappears while the player is stopped.
To cancel Program Play
Using the timers
The system offers two timer functions. If you use both timers, the Sleep Timer has priority. Use buttons on the remote to use the timer functions.
To delete the last track or file of the program
Press CLEAR while the player is stopped.
To view program information, such as total track number of the program
Press DISPLAY repeatedly.
Sleep Timer:
You can fall asleep to music. This function works even if the clock is not set. Press SLEEP repeatedly. If you select "AUTO," the system automatically turns off after the current disc or tape stops or in 100 minutes. If the tape deck is still playing or recording at the set time, the system turns off after the tape deck stops.
Presetting radio stations
You can preset your favourite radio stations and tune them in instantly by selecting the corresponding preset number.
Play Timer:
You can wake up to CD or tuner at a preset time. Make sure you have set the clock.
1 Tune in the desired station (See "Listening to the
radio").
1 Prepare the sound source.
Press VOLUME +/ (or turn VOLUME on the unit) to adjust the volume. To start from a specific CD track or MP3 file, create your own CD program.
2 Press TUNER MEMORY .
Preset number
2 Press CLOCK/TIMER SET . 3 Press / repeatedly to select "PLAY SET," 3 Press +/ (or TUNING +/ on the unit) repeatedly
to select your desired preset number. If another station is already assigned to the selected preset number, the station is replaced by the new stations.
then press ENTER . "ON TIME" appears, and the hour indication flashes. Press / repeatedly to set the hour, then press ENTER . The minute indication flashes. Use the procedure above to set the minutes.
4 Set the time to start playback.
4 Press ENTER . 5 Repeat steps 1 through 4 to store other stations.
You can preset up to 20 FM and 10 AM stations. The preset stations are retained for about half a day even if you disconnect the power cord or if a power failure occurs.
5 Use the same procedure as in step 4 to set the time
to stop playback.
6 Select the sound source.
Press / repeatedly until the sound source you want appears, then press ENTER . The display shows the timer settings.
6 To call up a preset radio station, press TUNING
MODE repeatedly until "PRESET" appears, and then press +/ (or TUNING +/ on the unit) repeatedly to select the desired preset number.
7 Press to turn off the system.
If the system is on at the preset time, the Play Timer will not play.
To activate or check the timer again
Press CLOCK/TIMER SELECT , press / repeatedly until "PLAY SEL" appears, then press ENTER .
To cancel the timer
Repeat the same procedure as above until "OFF" appears, and then press ENTER .
To change the setting
Start over from step 1.
Tip
The Play Timer setting remains as long as the setting is not cancelled manually.
7
HCD-EC68/EC78 SECTION 3 DISASSEMBLY
· 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. TOP PANEL (EC68: UK MODEL)/TOP PANEL BLOCK (EXCEPT EC68: UK MODEL) (Page 9)
3-4. TAPE MECHANISM DECK (EXCEPT EC68: UK MODEL) (Page 10)
3-5. MAIN BOARD (Page 10)
3-6. FRONT PANEL SECTION (Page 11)
3-7. BACK PANEL BLOCK (Page 11)
3-8. CD MECHANISM BLOCK (Page 12)
3-9. BU BLOCK (Page 12)
3-11. OP BASE ASSY (KSM-213D) (Page 13)
8
HCD-EC68/EC78
Note: Follow the disassembly procedure in the numerical order shown below.
3-2.
SIDE PANEL (L)/(R)
two screws (BVTP3 × 10)
four screws (case3 TP)
two screws (BVTP3 × 10)
side panel (L)
side panel (R) four screws (case3 TP)
3-3.
TOP PANEL (EC68: UK MODEL)/TOP PANEL BLOCK (EXCEPT EC68: UK MODEL)
top panel (EC68: UK) top panel block (except EC68: UK) flexible flat cable (9 core) (CN606) (except EC68: UK)
two screws (BVTP3 × 10)
two screws (BVTP3 × 10)
screw (KTP3 × 10)
screw (KTP3 × 10)
9
HCD-EC68/EC78
3-4.
TAPE MECHANISM DECK (EXCEPT EC68: UK MODEL)
Note: This illustration is seeing top panel block from inside. two screws (2.6 × 8) bracket (deck) DECK board
two screws (2.6 × 8)
two screws (BVTP3 × 6) connector (CN501)
tape mechanism deck (TCM-J1 or CS-21SC-900TP)
top panel block
3-5.
MAIN BOARD
connector (CN151) MAIN board two screws (BVTP3 × 6) flexible flat cable (5 core) (CN603) flexible flat cable (5 core) (CN602) (EC78) connector (CN633)
two screws (BVTP3 × 10) (EC78)
connector (CN601)
two screws (BVTP3 × 10)
screw (BVTP3 × 10)
flexible flat cable (27 core) (CN607) flexible flat cable (9 core) (CN605) connector (CN604) flexible flat cable (21 core) (CN608)
10
HCD-EC68/EC78
3-6.
FRONT PANEL SECTION
flexible flat cable (9 core) (CN605) flexible flat cable (27 core) (CN607) front panel section flexible flat cable (13 core) (CN302)
lever
pull the tray by hand. gear two screws (BVTP3 × 10) Turn a gear by a driver till a lever falls down to the position of the figure.
door (CD)
3-7.
BACK PANEL BLOCK
connector (CN601) connector (power cord) (CN053) screw (BVTP3 × 10) two screws (BVTP3 × 10) two screws (BVTP3 × 10) (EC78)
six screws (BVTP3 × 10)
two screws (BVTP3 × 10) back panel block Cut the clamp. Note: Please do not forget fixation by clamping when you install the power cord.
11
HCD-EC68/EC78
3-8.
CD MECHANISM BLOCK
flexible flat cable (21 core) (MAIN board: CN608/ CD board: CN201)
CD mechanism block
four screws (BVTP3 × 10)
two tapes flexible flat cable (13 core) Note: When installing the CD mechanism section, install two tapes for prevention of noise.
3-9.
BU BLOCK
insulator
BU block
insulator two coil springs (insurator) two screws (PTPWHM2.6) insulator
insulator two coil springs (insurator) two screws (PTPWHM2.6)
12
HCD-EC68/EC78
3-10. OP BASE ASSY (KSM-213D)
op base assy (KSM-213D)
flexible flat cable (16 core) (CN301)
CD board Remove four solders.
13
HCD-EC68/EC78 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 [I/1] button to turn the power on. 2. Press three buttons of [x], [FUNCTION] and at last [I/1] simultaneously. 3. When "RESET" appears, the set enters standby status.
CD TRAY LOCK
This mode is for the antitheft of CD disc in shop. (not for transport) Procedure: 1. Press the [I/1] button to turn the power on. 2. Press the [FUNCTION] button to select CD function. 3. Insert a disc. 4. While pressing the [x] button, press the [Z] button for more 5 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 [x] button, press the [Z] button for 5 seconds again. 8. The message "UNLOCKED" is displayed and the disc tray is unlocked.
PANEL TEST MODE
Enter The Panel Test Mode Procedure: 1. In the standby status, press the [I/1] button to turn the power on. 2. Press three buttons of [DISPLAY], [x], and [FUNCTION] 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 [X] 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 [FUNCTION] 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], [x], and [FUNCTION] simultaneously.
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 [I/1] button to turn the power on. 2. Press the [FUNCTION] button to select CD function. 3. Press the [I/1] button again to turn the power off (standby). 4. After pressing the [DISPLAY] button, while pressing the [x] button, press the [I/1] button. 5. It turns power on and display "CD POWER", then display "ON" or "OFF".
CHANGE-OVER THE AM TUNING INTERVAL
(Except EC68: AEP, UK and Russian/EC78: AEP and Russian models) The AM tuning interval can be changed over 9 kHz or 10 kHz. Procedure: 1. Press the [I/1] button to turn the power on. 2. Press the [TUNER/BAND] button to select TUNER (AM) function. 3. Press the [I/1] button again to turn the power off (standby). 4. After pressing the [DISPLAY] button, while pressing the [TUNING + M L] button, press the [I/1] button. 5. It turns power on and display "9k STEP" or "10k STEP", and thus the tuning interval is changed over.
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 [I/1] button to turn the power on. 2. Press the [FUNCTION] button to select CD function. 3. Press three buttons of [DISPLAY], [x], and [l m TUNING] simultaneously. 4. It enters the CD repeat 5 limit cancel mode and displays "NO LIMIT" 5. To release this mode, press the [I/1] button to turn the power off.
CD SHIP AND COLD RESET
Procedure: 1. Press the [I/1] button to turn the power on. 2. Confirm there is no disc in all trays. 3. Press the [FUNCTION] button to select CD function. 4. Press three buttons of [PLAY MODE/TUNING MODE], [l m TUNING] and [I/1] simultaneously. 5. After blink "STANDBY", "RESET" is displayed, disconnect the AC plug.
COMMON TEST MODE
Procedure: 1. Press the [I/1] button to turn the power on. 2. Press three buttons of [PLAY MODE/TUNING MODE], [TUNING + M L], and [DISPLAY] simultaneously. 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 [PLAY MODE/TUNING MODE], [TUNING + M L], and [DISPLAY] simultaneously.
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 [I/1] button to turn the power on. 2. Confirm there is no disc in all trays. 3. Press the [FUNCTION] button to select CD function. 4. Press two buttons of [CD N] and [I/1] simultaneously. 5. Set to the CD ship mode. (chucking on) 6. After blink "STANDBY", "LOCK" is displayed, disconnect the AC plug.
14
HCD-EC68/EC78
[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.
CD Servo Test Mode Tree:
S Curve Mode (BDT S CU) RAM Read Mode (BDTRAM R)
How to Enter the CD Servo Test Mode Procedure: 1. Press the [I/1] button to turn the power on. 2. Press the [FUNCTION] button to select CD function. 3. Press three buttons of [CD N], [l m TUNING] and [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 [CD N], [l m TUNING] and [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 five modes 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 five 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. [DSGX] , [EQ]: Use these keys to move between the different layers 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. [TUNING + M L], [l m TUNING]: Use these keys to move the cursor to the right digit or to the left digit in the six-digit number, when changing the numeric value. Press [TUNING + M L] to move the cursor to the right, and press [l m TUNING] to return the cursor to the left. [FUNCTION]: Use this key to execute Command Out in the Command Out Mode.
Higher layer LD ON (LD ON) Disc Type (DISCTYPE) Gain Index (GAININDX) RFO GAIN (RFO_GAIN) FEO GAIN (FEO_GAIN) SBAD GAIN (SBAD_GAI) TEO GAIN (TEO_GAIN) Disc Size (DISCSIZE) Op ABRAKE Error (OPABRKER) SBBT Data (SBBT DAT) FEOOCD (FEOOCD) SPG Mask (00 SPG) Fix RF Gain (00 FIX) TMAX ON (00 TMA) Driver Mute OFF (00 D_M) COMOUT6X (COMOUT6X) READ2X (READ2X) REG READ (REG_READ) FEBC? (FEBC?) FGADD? (FGADD?) TEBC? (TEBC?) TGADD? (TGADD?) RFGC? (RFGC?) FEOF? (FEOF?) TEOF? (TEOF?) TEIOCD1? (TEIOCD1?) TEIOCD2? (TEIOCD2?) TEIOCD3? (TEIOCD3?) TEOOCD? (TEOOCD?) FEOOCD? (FEOOCD?) MONITOR (MONITOR)
Lower layer of menu hierarchy
RAM Write Mode (BDTRAM W)
value indication (AL: 0000, RW: 0001) value indication (0001) value indication (0009) value indication (0005) value indication (0007) value indication (000A) value indication (0000: Non disc, 0001: 8cm, 0002: 12cm) value indication (0000) value indication (006C) value indication (0440) value edit (Non mask:00, Mask:01) value edit (Non Fix:00, AL Fix:01, RW Fix:02) value edit value edit (Normal:00, Forced OFF:01) value edit command out (000000) (OK) value edit command out (60) (50) value edit command out (00) (0000) command out (00) command out (10) command out (00) command out (00) command out (00) command out (FFC0) command out (FFC0) command out (FE80) command out (FF40) command out (FFC0) command out (FD00) command out (F780) value edit command out (570A00) (OK) Error rate indication (00000000)
Command Out Mode (BDT COMO)
Error Rate Mode (BDT ERR)
15
HCD-EC68/EC78
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 [I/1] button to turn the power on. 2. Press three buttons of [CD N], [TUNING + M L], and 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 [CD N], [TUNING + M L] and DISPLAY simultaneously. Key Operation: [TUNING + M L], [l m TUNING]: Use these keys to move the SLED. When [TUNING + M L] is pressed in this mode, the SLED moves to outer circumference and the message "SLED OUT" is displayed. When [l m TUNING] is pressed in this mode, the SLED moves to inner circumference and the message "SLED IN" is displayed. [DISPLAY]: Use this key to turn the optical pick-up laser power 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.
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 operations or during the initialization operation. FF : The error has occurred in the normal operations. Other than FF : The error has occurred during the initialization operation. 3 It indicates the processing during which the trouble has occurred. 01: The disc EJECT processing is in progress. 02: The disc INSERTION-WAITING processing is in progress. 03: Processing of the disc INSERTION-REQUEST for the upper CD tray is in progress. 04: Processing of the disc EJECTION-REQUEST for the upper 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 progress. 4 It indicates the operation during which the trouble has occurred. 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 progress. Contents of "BD Errors" Error display example D 0 02 09 01 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 specified period of time (time over) 04: The focus servo is unlocked continuously. 05: Q code cannot be obtained within the specified period of time. 06: The tracking servo cannot lock-in. 07: Blank disc
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 [I/1] button to turn the power on. 2. Press the [FUNCTION] button to select CD function. 3. Press three buttons of [TUNING + M L], [x] and [DISPLAY] 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 + M L] button in this mode increments the number after "M" starting from "M0" up to "M9", and then returns to "M0". Every pressing of the [l 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 [PLAY MODE/TUNING MODE] 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] and the [l m TUNING] buttons in this mode enables tracing of the error history. 7. To release from this mode, press the [I/1] button to turn the power off.
16
HCD-EC68/EC78
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 progress. 0C: The PAUSE MANUAL SEARCH operation is in progress. 4 It indicates the operation that is being processed when the trouble has occurred. It indicates the step number of each processing specified by 3. Because the numbers of steps are different in each processing, this number is different in each processing.
Key Operation: [DISPLAY]: The display changes in the following order whenever the button is pressed.
(Initial display) fcsAG ** (**: Focus AGC value) trkAG ** (**: Track AGC value) RF-AG ** (**: RF AGC value)
[DSGX]: RF gain setting changes whenever the button is pressed. "": No gain fixation. "AL": Fix to the gain for AL disc. "RW": Fix to the gain for RW disc. [EQ]: Tracking servo setting changes whenever the button is pressed. "ON": Tracking servo ON. "OFF": Tracking servo OFF. [FUNCTION]: S character mode setting changes whenever the button is pressed. " ": S character mode OFF. "S": S character mode ON. 5. To release from this mode, press the [I/1] button to turn the power off.
CD FACTORY MODE
Note1: Do not enter the [CD FACTORY MODE] while any other testmode is in progress. Note2: Do not enter any other test mode while the [CD FACTORY MODE] is in progress.
Procedure: 1. Press the [I/1] button to turn the power on. 2. Press the [FUNCTION] button to select CD function 3. Press three buttons of [CD N], [FUNCTION], and [DISPLAY] simultaneously. 4. It enters the CD factory mode and displays the following message.
X1ON
S character mode setting Tracking servo setting RF gain setting
17
HCD-EC68/EC78 SECTION 5 MECHANICAL ADJUSTMENTS
PRECAUTION 1. Clean the following parts with a denatured-alcohol-moistened swab : record/playback head pinch roller erase head rubber belts capstan idlers 2. Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head magnetizer close to the erase head.) 3. Do not use a magnetized screwdriver for the adjustments. 4. After the adjustments, appiy suitable locking compound to the parts adjusted. 5. The adjustments should be performed with the rated power supply voltage unless otherwise noted. · Torque Measurement
Mode FWD FWD Back Tension FF REV Torque Meter CQ-102AS CQ-102C CQ-201AS CQ-201B Meter Reading 2.0 8.0 mN · m (20 to 80 g · cm) (0.28 1.12 oz · inch) 0.15 0.6 mN · m (1.5 to 6 g · cm) (0.021 0.083 oz · inch) 5 17.7 mN · m (50 to 177 g · cm) (0.7 2.48 oz · inch) 5 17.7 mN · m (50 to 177 g · cm) (0.7 2.48 oz · inch)
SECTION 6 ELECTRICAL ADJUSTMENTS
DECK SECTION (EXCEPT EC68: UK model) 0 dB = 0.775V 1. Demagnetize the record/playback head with a head demagnetizer. 2. Do not use a magnetized screwdriver for the adjustments. TEST TAPE
Tape P-4-A063 Signal 6.3 kHz, -10 dB Used for Azimuth Adjustment
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
Note: Perform this adjustments for both decks.
Procedure: 1. Mode: Playback
test tape P-4-A063 (6.3 kHz, -10 dB) JACK board PHONES jack (J492) level meter set +
2. Turn the adjustment screw and check output peaks. If the peaks do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 1dB of peak.
·
Tape Tension Measurement
Mode FWD Tension Meter CQ-403A Meter Reading more than 80 g (more than 2.82 oz) L-CH peak Output level R-CH peak L-CH peak R-CH peak within 1dB within 1dB
Screw position
Screw position
3. Mode: Playback
test tape JACK board P-4-A063 (6.3 kHz, -10 dB) PHONES jack (J492) oscilloscope
set
V
H
waveform of oscilloscope
in phase 45° good
90°
135° 180° wrong
4. After the adjustments, apply suitable locking compound to the pats adjusted.
18
HCD-EC68/EC78
Adjustment Location: Record/Playback/Erase Head
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 M impedance. 4. Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks. 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 [I/1] button to turn the power ON, and press the [Z] button to open the CD disc tray. 3. Set disc (YEDS-18) on the trey and press the [CD N] button to playback. 4. Confirm that oscilloscope waveform is as shown in the figure 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
level: 1.2 ± 0.3 Vp-p
Checking Location: CD Board (Conductor Side)
TP124 (VC)
TP121 (RFI) IC101
19
HCD-EC68/EC78
TUNER SECTION [AM] Setting: FUNCTION: AM
0 dB = 1 V
AM FREQUENCY COVERAGE ADJUSTMENT (EC68: Mexican, Argentina, Australian/ EC78: Mexican, Argentina models) Reading on Digital Adjustment Part Frequency Display Voltmeter L801 530 kHz 1.5 ± 0.1 V Confirmation 1,710 kHz 8 ± 0.5 V
60 cm loop antenna A loop antenna B AM RF signal generator level meter 32 30% amplitude modulation by 400 Hz signal Output level: 54 dBuV set MAIN board ANTENNA CN801 pin
+
AM FREQUENCY COVERAGE ADJUSTMENT (Except EC68: Mexican, Argentina, Australian/ EC78: Mexican, Argentina models) Reading on Digital Adjustment Part Frequency Display Voltmeter L801 531 kHz 1.5 ± 0.1 V Confirmation 1,602 kHz 7.2 ± 0.5 V
JACK board PHONES jack (J492)
[FM] Setting: FUNCTION: FM
FM RF signal generator 0.01 F MAIN board ANTENNA CN801 pin set MAIN board 75kHz frequency ANTENNA deviation by 1K Hz CN801 pin signal Output level: as low as possible (8dBuV)
AM TRACKING ADJUSTMENT (Except EC68: Mexican, Argentina, Australian/ EC78: Mexican, Argentina models) Adjust for a maximum reading on level meter L805 level meter 32 + JACK board PHONES jack (J492) 530 kHz
AM TRACKING ADJUSTMENT (EC68: Mexican, Argentina, Australian/ EC78: Mexican, Argentina models) Adjust for a maximum reading on level meter L805 531 kHz
digital voltmeter MAIN board IC801 pin (TUNER VT) 100 k
FM FREQUENCY COVERAGE ADJUSTMENT Reading on Digital Adjustment Part Frequency Display Voltmeter L803 87.5 kHz 1.75 ± 0.1 V Confirmation 108 kHz 6.2 ± 0.5 V
FM TRACKING ADJUSTMENT Adjust for a minimum reading on level meter L804 98 MHz
· Repeat the procedures in each adjustment several times.
Adjustment Location: MAIN board (See page 21) [FM DETECTOR ADJUSTMENT] Setting: FUNCTION: FM
FM RF signal generator MAIN board ANTENNA CN801 pin MAIN board IC801 pin (TUNER OUT L-ch) level meter + MAIN board JW801 (TUNER-GND)
set MAIN board ANTENNA CN801 pin
Carrier frequency: 98MHz Modulation: deviation by FM 75 kHz Output level: 60 dBuV
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.
20
HCD-EC68/EC78
[FM Auto Stop Check]
generator SET + 75
Adjustment Location and Connecting Points: MAIN Board (Component Side)
L804 AM Tracking Adjustment
L801 FM Frequency Coverage Adjustment L802 FM Detector Adjustment L803 FM Frequency Coverage Adjustment L805 AM Tracking Adjustment
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.
MAIN Board (Conductor Side)
3 1 CN801 ANTENNA 36 IC801 1 19 18 JW801 (TUNER-GND)
3. Set to FM tuner function and scan the input FM signal with automatic scanning. 4. Confirm that input Frequency of A, B and C detected and automatic scanning stops. The stop of automatic scanning means "The station signal is received in good condition".
IC801 pin (TUNER VT)
IC801 pin (TUNER OUT L-ch)
21
HCD-EC68/EC78
MEMO
22
HCD-EC68/EC78 SECTION 7 DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.)
For Printed Wiring Boards.
Note: · X : Parts extracted from the component side. · Y : Parts extracted from the conductor side. · W : indicated side identified with part number. · : Internal component. f · : Pattern from the side which enables seeing. (The other layers' patterns are not indicated.) Caution: Parts face side: (Conductor Side) Pattern face side: (Component Side)
· Circuit Boards Location
MAIN board DECK board (except EC68:UK) HI AMP board (EC78) PANEL board
For Schematic Diagrams.
Note: · All capacitors are in F unless otherwise noted. (p: pF) 50 WV or less are not indicated except for electrolytics and tantalums. · All resistors are in and 1/4 W or less unless otherwise specified. · f : internal component. · 2 : nonflammable resistor. · C : panel designation. The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. · · · · A : B+ Line. B : B Line. C : adjustment for repair. Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. CD Board no mark : CD PLAY DECK Board no mark : TAPE PLAY ( ) : TAPE REC Other Boards no mark : TUNER (FM/AM) ( ) : TAPE PLAY < > : TAPE REC { } : CD PLAY · Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. · Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances. · Circled numbers refer to waveforms. · Signal path. F : FM f : AM J : CD PLAY E : TAPE PLAY j : REC i : AUDIO IN · Abbreviation AR : Argentina model AUS : Australian model E2 : 120V AC area in E model E3 : 240V AC area in E model E51 : Chilean and Peruvian models MX : Mexican model RU : Russian model
KEY POWER board
Parts on the parts face side seen from the pattern face are indicated. Parts on the pattern face side seen from the parts face are indicated.
· Indication of transistor. C Q B E These are omitted.
LOW AMP board
Q B C E These are omitted.
PT board KEY CD board CD board REG board
JACK board
HCD-EC68/EC78
23
23
HCD-EC68/EC78
7-1.
PRINTED WIRING BOARD - CD Board -
· See page 23 for Circuit Boards Location.
·
: Uses unleaded solder.
1
2
3
4
5
6
CD BOARD (CONDUCTOR SIDE)
7
8
9
A
CD BOARD (COMPONENT SIDE)
M
M401 (SPINDLE)
B
C401
C405
(LIMIT)
S201
C404
C403
C125
R402 28 22
TP124 (VC) C122
C124
IC401 21
R405
15
M402 (SLED)
R118
C
R142
R129 C136
C123
R140
R136
R139
M
R127 C153
R134
R130
R151
R143
R128
R120
R135 C137
R126 R125
1 R415
7
8
14
C138
C140
C139
R414
C108 51 50
C141
C142
TP121 (RFI)
R212
C107
C112
R114
C100
R211
C143
R144 C145 C146 C147
75 76
R113
R408
CN201
R210 R209 R218 R208 R207 R206 R205 R204 R203 R157 R156 R108 1
R112 R111
C144
D
IC201
C207 5 4 C115
C133
C149
C106
C104
C109
C110
C148
R110
C105
IC101
R146 R155 R148 C150
R145 R147 R149 100 R150 26
R153
R219 R220 R221 R222 R223
M
(Page 27)
C152 C151
C206
C201
C102
C118
C205
C306
C117
C120 C119
C101
3 R201
1
25 C113
R104
C130
C103 R101 R303 C126 C127
R106
C132
X102
R105
C116
1
MAIN BOARD CN608
R154
E
C202 C128
R102
21
R302
R304
C301
11 1-872-135(11)
1 CN301 16
C204
C309
R202
Q301
C307
E
R301
C303 C302
F
OPTICAL PICK-UP BLOCK (KSM-213DCP)
11 1-872-135(11)
HCD-EC68/EC78
24
24
HCD-EC68/EC78
7-2.
SCHEMATIC DIAGRAM - CD Board -
· See page 37 for waveforms. · See page 38 for IC Block Diagrams. · See page 40 for IC Pin Function Description.
(BX5BT/CBX1)
R127 0 R126 0
C107 0.1
C136 47p
CN301 16P
C301 0.1
AUTOMATIC POWER CONTROL
R136 R135 22k 470k
OPTICAL PICK-UP BLOCK (KSM-213DCP)
C302 10
C303 10
R303 C306 100 2.2 10V R304 2.2
C137 0.01 R302 0
C138
C307 1
R301 100k
470p
R128
Q301 2SA2119K
470k
R142 22k R143 47k
R139 47k R140 0 R134 1M
R129 1k R130 4.7k
R125 0
R120 0
C112 0.1
R118 100k
C153 0.1
R114 10k
C108 0.1
CN201 21P
1
C100 0.1 C139 0.01 C106 100 10V C140 0.01 TP121 (RFI) C141 0.0022 C142 0.1 R113 10k
R212 100
R211
100
C309 0.001
R210 R209 R218 100k R219 100k R220 100k R208 R207 R206 R205 R204 R203
100 100 100 100 100 100 100 100
M401 (SPINDLE)
C105 0.1 SPC144 0.1 C148 47p C104 0.1 SL+
TP124 (VC) R144 22k C143 0.01 C146 470p C145 0.01 C147 0.1 C149 22p
M
MAIN BOARD (2/2) CN608
M
M402 (SLED)
IC101
CD-MP3 PROCESSOR IC101 TC94A70FG-006 (D, HZ
C133 0.1 R112 100 R111 100 R110 10k C110 0.1 C207 1
R221 100k R222 100k R223 100k
SP+
IC B/D
(Page 29)
M
SL-
R145 0 R146 0 R147 0 R148 0 R149 0 C150 0.001 R154 1M R150 0 C116 0.1 R108 0 C109 0.1 R153 1M R155 47 C115 22 6.3V
C206 1 R157 100 R156 100 C151 470p C152 470p
C201 100 10V
C205 0.1
IC201 TK63115SCL-G@GT
2
C117 0.022
C118 0.01
IC201
+1.5V REGULATOR
C202 100 10V C204 0.1
R201 0 R202 0
0
220
R101
C128 5p
R405 10k R402 2.2k C405 0.1 C404 0.1 C403 0.1 C123 470p C122 470p
C124 0.0047
C127
C132
0.1
C126
0.1
C130 5p R104 0
0.0022
C120 0.01
C102 0.1
X102 16.9344MHz
R106
C119 0.022
R151
R105 1M
1k
C125 0.0047
0.1
(LIMIT)
S201
C113
C103 0.1
R102 10k
C101 0.1
IC401
FOCUS/TRACKING COIL DRIVE, SLED/SPINDLE MOTOR DRIVE IC401 BA5826SFP-E2
SPSP+ SL+ SL-
IC B/D
R414 4.7k
R408 2.2k
R415 47k
C401 220 10V
HCD-EC68/EC78
25
25
HCD-EC68/EC78
7-3.
PRINTED WIRING BOARD - DECK Board (Except EC68: UK model) · : Uses unleaded solder.
· See page 23 for Circuit Boards Location.
7-4.
SCHEMATIC DIAGRAM - DECK Board (Except EC68: UK model) 1 2 DECK BOARD
C506 0.01
· See page 37 for waveforms.
7 8 9
1
DECK BOARD
2
C516
3
R537 R535 1 C542 R514 Q501 E C536 R538 B Q502 E
4
A
3
C546 R506 15k R508 330k
4
0.1 R544 R510 C516 47 16V R512 100k R546 470 100 150
5
6
CN501 8P C514 1 50V R514 100k 8 7 6 R516 0 5 4 3 2
A
C506 R506 9 JW502 R504 C504 C543 R508
C546 C535 C537 B C538 JR503 3 R539
C512 C510 220p 47p
Rch COM Lch VREF EH SW M-GND 9V
TAPE MECHANISM DECK
R504 2.2k
R510 C510 R544 C512 C514 R512 R546 C511 R511 C513 R513 JR502 R509 JR501 R515
C504 2200p R501 2.2k C543 1000p IC501 NJM4558V-TE2
B
TAPE MECHANISM DECK
7.4
3.6
3.6 6 +
8 5 JW503 C517 1 4
L501 BIAS OSC 1
8
7
VCC
3.6 5
11
3
1
1 C501 R502 R501 JW501 ET501
MAIN BOARD CN606
C503 R503 C502
IC501C509 R545
R505 C545 R543 C515
R541 6 CN501 JW504 8 4 C539 R540 R536
C503 2200p
1 3.6
2 3.6
GND
4
3.6
C505 R507
C
R503 2.2k C505 0.01
(Page 27)
R507 330k
R516
C540 R534 S501 (REC/PB) PB REC R527 JW508 C529 C527 R529 R523 R524 C528 C533 R531 R532 R530
B
C511 220p
D
1 9V
R505 15k C501 100 16V C502 100 16V R502 2.2k R524 3.3k 1k
TP501 TP502 TP503 TP504 TP505 TP506 TP507 TP508 TP509
R517 C521 R519 (CHASSIS)
C523 R521
C525 C531 JW507 R525 JW506 4 1 5 8 R526
JW510
PB-Lch
R518
R522
JW509
29)
9 I-TP-STATE
C534
C520 470p R520 47k C526 47p
R526 330k
R528 330k R530 2.2k L501 BIAS OSC 6 5
3.6
3.6
3.6
7.4
C
C526 C532
R528 C530 1-875-501S501
11 (11)
R532
C520
R520
IC502
E (Page
R518
M-GND 9V
8.2k
JW505 C519 C522 C524
K
MAIN BOARD (2/2) CN606
PB-Rch A-GND REC-Lch REC-Rch
R533
E
C524 0.1
R522 47k C522 1 C532 0.01
F
IC502 NJM4558V-TE2
IC502
REC AMP 1 2 3 R540 47 R541 47 C538 0.01 C539 1
5
6 +
7
8
-1
-2
GND
VCC
4
4
3 3.6
2 3.6
3.6
G
R517 1k C519 470p C521
1 C525 47p R521 47k
R519 47k
R525 330k C531 0.01 3.3k
D
H
C542 22 25V
C523 0.1
C527 470p R523
HCD-EC68/EC78
26
26
+
+ C509 47p C515 47 16V C545 0.1 C517 1000p
K
IC501
PB AMP R545 470 R511 100k C513 1 50V R509 R543 R515 0 R513 100k 150 100
S501 (REC/PB) PB REC -1
-2
ET501
C528 470p C530 330p
(CHASSIS) C540 4700
1 Q501 2SC1740S-RT 0.3 (5.2) 0.3 (5.2) C535 2200p 0 (0.2) Q501,502 OSC Q502 2SC1740S-RT
R539
4.7
0.3 (5.2) 0.3 (5.2) C536 2200p
R527 330k
R529 2.2k
R531 8.2k
C529 330p
C533 2200p
C534 2200p
R537 10k
C537 2200p R536 4.7k
R538 10k
R533 22k
R534 15k R535 4.7k
HCD-EC68/EC78
7-5.
PRINTED WIRING BOARD - MAIN Board 1 2
(EC78)
· See page 23 for Circuit Boards Location.
·
: Uses unleaded solder.
3
E
(Page 30)
JW744 L805 D802 R826 JW741 HI AMP BOARD CN151
4
M
3 1
M601 (FAN)
5
(EC78)
6
(Page 30)
HI AMP BOARD CN152
7
F H
LOW AMP BOARD CN102
8
9
· Semiconductor Location
Ref. No. D601 D602 D603 D604 D605 D606 D607 D608 D609 D610 D611 D612 D614 D615 D617 D618 D619 D620 D621 D622 D628 D629 D630 D631 D791 D801 D802 D803 D804 D805 D806 IC602 IC801 Q601 Q602 Q603 Q604 Q605 Q606 Q608 Q611 Q612 Q616 Q617 Q618 Q619 Q622 Q624 Q801 Q802 Location E-2 E-6 E-3 G-3 D-5 E-6 G-5 F-5 G-5 F-5 H-6 H-6 B-6 D-7 D-6 E-6 E-6 E-7 D-5 D-5 D-7 H-6 H-6 E-7 E-5 B-3 A-4 B-4 B-3 B-2 A-2 B-7 C-4 D-4 D-5 D-5 G-3 D-6 D-5 B-6 D-5 D-6 B-9 B-9 D-7 G-6 E-6 E-7 B-5 B-5
(Page 31)
MAIN BOARD
A
D806 CN801 ANTENNA FM/AM 1 D805 JW743 3
JW601 R801 R804 R803 C803 R811 C823 L803 R840 C828 R825 C824 R824 R812 B E Q801 R810 C802 R807 R809 B E Q802 R667 Q608 D614 B E JW613 R814 R813 JW733 R666 R805 JW732 C809 JR613 R816 C811 R820 R821 C814 R726 JW734 R724 R672 C810 JW640 C630 JW674 JW620 JW703 R676 R673 JW629 JW631 C675 C676 C714 5 4 JW647 R808 JW609 CN602 2 1 C636 4 5 R682 (EXCEPT EC68:UK) R802 JW607 JW608 (EC68:UK) C652 R701 C657JR605 C658 JR606 R702 C654 R696 C645 C665 C651 JW603 JW606 JW605 JR607 JR608 JW615 CN606 JW604 JR603 JR604 (EXCEPT EC68:UK) R679 JW602 E B Q616 E B Q617 1
R847 R831 JW742
D804
D801 C837 R843 R838 TP690 C836 C819 C834
R827 D803 R841 C838 C840 R837 C820 C826 JW735
R806 JW740 R822
R704 R683 R695 C647 C648 R694 R700 C649 C655 C656 C643 C650 C646
C635 C639 JW610 R787 C700 C640 R788 R681
C699
B
FL803
C847 R846 C846
L804
C841
R680
R842 JW739 JW738
L801 JW737 JW736 R839 R829
JW611 CN603 1 2
JW802 R823
C666
2
C835
C644
R697 R709
(Page 26)
C806 C827 C821 C805 R819 R818 R817 C822 C804 C808 R815 C817 C816 R836 L802 C815
14
JW729 JW682 C848 T801 R832 JR602 (EC78) TB601
L
C844 R844 36 1
JW728 R845
JW731
R731 R732 C663
IC801
JW801 R830 C832 C829 JW803
19 18 C807 X801
JW612 TP619
JW726
27 26
C
JR601 C845 C843
JW804 JW721
R684 C633 C637 C638 C634 R751 C788 C684 R749 R752 R754 C685 C674 C789 R750 C664 C687
IC602 28 15
C662
1
R708 C653 (EXCEPT EC68:UK) C667 JW619 JW787 JR610 JW621 R715 C713 JR609
JW616 8
K
DECK BOARD
9 JW617 JW618 JW622 TP657 R660 JW623 (SUFFIX-12)
JW730 FL801 JW724 C830
JW625 C659 C660 R753 R707 C661 C686 R706 JW630
JW624 JW626
JW725
JW627 JW628
JW723 JW722
C831
JW750 JW751 JW752
L1
PANEL BOARD CN304
C603
CF801
C833
CN601 C850 3 JW779 JW656 R606 JW650 R607 C605 C604 C606
R
D
C692
C690
C681
C683
SPEAKER HIGH FREQ. IMPEDANCE USE 8
R693
L601
JW655
5 R608 L602 R633 R632 JW651 JW662 D601 R631
1 R634
1
2
CN632
C615 D603 RY601 C616 R636 JW672 R635
JW652
E
JW641 JW632 JW678 R725 Q601 R626 C641 JW706 D622 Q602 C632 R629 JR614 R729 B E R689 C614 1 C613 JW702 R670 JW773 B E Q618 R687 D617 R603 R627 D621 R630 Q611 R637 R678 B E R601 JW769 R605 Q603 R685 B E R604 B E R690 R686 C629 Q612 JW701 JW768 C619 JW649 D628 JW705 C602 JW675 R669 C601 JW771 JW685 R628 D615 JR615 JW767 D605 B E B E JW718 R692 JW677 D618 R716 C696 Q606 Q605 JW717 E B Q622 R652 R646 JW760 JW781 R720 R719 JW775 C695 R614 JW720 C669 R613 JW765 R718 R662 D606 R722 R717 D631 JW764 JW711 D791 JW663 JW669 C704 D602 E B B E 5 R658 R792 R791 11 R621 C611 R620 JW766 C621 R616 R727 R650 R651 D608 R617 JW690 R622 R728 JW683 (EC78:AEP,RU) C678 C626 EC68/EC78:E2, E3,E51,MX,AR D607 8 R623 CN604 R618 JW762 JW761 C612 JW780 R619 R625 3 C631 JW770 1 Q624 D619 D620 JW710
R677
(Page 32)
JR618 C694
CN607
JW633 JW634 JW635
L2
(Page 32)
(SUFFIX-13) PANEL BOARD CN304
C693 JW783 JW784 JW785 JW786
JW782
C679
JR611
JW636 JW637
JW638 JW697 JW713 CN608 2 1 C689 JW777 JW774 C691 JW704 C680 JW712 C682 C703 C671 C673 21 20
R639 JW657 JW719 CN633 JW708
D610
JW709
M
(Page 24)
CD BOARD CN201
JW658
JW715 JW716 JR612 R675 R674 JW680
CN605 2 1
F
JW654 TB602
L
R609
R640 JW661 JW673 JW666
C
R663 8 9
JW681
R611 C609 L603 R610
(Page 34)
JACK BOARD
C617 RY602 C618 C607 D604 R638 R641 JW665 B E Q604 R643 C620 R642 R649 R648
JW664 JW679 JR617 JR616 JW676 JW668
(EC68)
G
SPEAKER IMPEDANCE USE 6
JW659 JW653 JW660
R647 R615
C608
1
R624
R645
EC68/EC78:E2, E3,E51,MX,AR C622 D609 JW684
JW689
C642 Q619 R691 B E (EC68) D630 D629
JW699 JW763 12, 13 (12, 13)
SPEAKER LOW FREQ. IMPEDANCE USE 8
(EC78)
C610 R612
R
JW700 JW686 JW639
R644 1-875-488-
L604
C677 (EC78:AEP,RU) C628
C623
C627
H
JW667 ET601 JW670 D611 D612 (EC78) ET602
D
(CHASSIS) RY601,RY602 LOW AMP BOARD CN104
G
(Page 31)
PT BOARD CN051
REG BOARD W610
J
(CHASSIS)
(Page 34)
(Page 35)
I
Note: Refer to "SUFFIX-12/SUFFIX-13 DISCRIMINATION OF PANEL BOARD" (page 3) of the servicing notes for suffix-12 and suffix-13.
HCD-EC68/EC78
27
27
HCD-EC68/EC78
7-6. SCHEMATIC DIAGRAM - MAIN Board (1/2) 1 2 3 MAIN BOARD (1/2)
CN601 3P M601 (FAN)
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
A M
VDD+ GND VDD+
1 2 3
PROTECT Q601 KTA1266GR-AT 0.4 16.6 8.8 0 Q603 2SC3052F-T1-LF PROTECT DETECT R726 15 R626 10k 16.7 R627 4.7k 16.7 Q601, 602 FAN MOTOR DRIVE 10.8 Q608 2SC3052F-T1-LF DC DETECT 2.3 2.9 R667 47k R666 1k 47k C630 47 10V O-POWER R614 10k R613 10k D606 MC2836 R725 15 R724 15 R672 10k D614 MA2J1110GLS0
TP601 TP602 R604 100k
JW750
JW751
JW752
D622 MAZ8082GMLS0
B
Q602 2SC3052F-T1-LF 0
R605 15 (EC78: AEP, RU) 56 (EC68/EC78: E2, E3, E51, MX, AR) R605 R603 4.7 C601 47 25V C602 22 25V R601 470
D621 MAZ8043GMLS0 R629 4.7k
0 C613 10 50V
(EC78)
CN602 5P
C614 4.7 50V
R630
C
F
HI AMP BOARD CN152
IN-R A-GND IN-L AMP-ON PROTECT
1 2 3 4 5
AMP-R
D602 MC2838-T112-1 D609 1N5402-F46
AMP-L AMP-STBY
(Page 30)
1N5402-F46
1N5402-F46
10k R618
OUT-R +VH -VH OUT-L
2 Q605 2SC3052F-T1-LF TP612 RY601 R608 10 D603 MA2J1110GLS0 R632 100k R633 100k 10 C604 0.1 C605 0.1 R607 10 C615 0.1 C616 0.1 R631 10 C695 1 C696 1 R652 100 R646 100 0 Q605, 606 PROTECT DETECT 0 8.8 Q606 2SC3052F-T1-LF 8.8 D791 MA2J1110GLS0 3 4 5 CN632 5P TP614 R791 100k (EC78)
D607
D608
D610
R624
R623
(Page 30)
TB601 + SPEAKER HIGH FREQ. IMPEDANCE USE 8 R
D612 D611 D630 D629
2A02M 2A02M
R622
D
HI AMP BOARD CN151
R625 33k
33k R616
10k R617
E
PA-GND
1
TP609
1N5402-F46
R634 56
R635 56
R636 56
R619 3.9k
10k
10k
3.9k
50V
50V
50V
50V
CN604 8P C623 0.1 100V C621 0.1 100V TP627 TP628 TP629 1 2 3 4 5 6
1N4002B 1N4002B (EC68)
RELAY ON/OFF V STBY AC DETECT VH(AC) VL(AC) GND VL(AC) VH(AC)
2200
2200
3300
R621 4.7k
C612 0.22
220k
C622
C678
C606 4700p
L601
R792
E
(Page 31)
CN603 5P
C603 4700p
C628 1000 25V C627 2200 25V
C626
C677
H
F
LOW AMP BOARD CN102
A-GND IN-L AMP-ON PROTECT
G
G
(Page 31)
LOW AMP BOARD CN104
PA-GND OUT-R +VH -VH OUT-L
RY602 (EC78) SPEAKER LOW FREQ. IMPEDANCE USE 8 R612 10 TP626 L