Friday, May 08, 2020

Sony HCD SH2000 How to disassemble, adjustments, how to eject the disc during a power failure HI-Fi component system

How to eject the disc at emergency, How to reset the set, how to do a factory reset, Cold reset, mechanism disassembly – SONY HCD SH2000 Hi Fi Component System.
HCD-SH2000 is the tuner, USB, CD and amplifier section in FST-SH2000 or LBT-SH2000
CD Mechanism Type: CDM86B-DVBU101
Optical Pick-up Name: KHM-313CAB/C2NP
This product contains technology subject to certain intellectual property rights of Microsoft. Use or distribution of this technology outside of this product is prohibited without the appropriate license(s) from Microsoft.
Amplifier section
The following are measured at AC 120 V - 240 V, 50/60 Hz
Power output (rated): High channel 300 W + 300 W (at 4 Ω, 1 kHz, 1% THD)
Low channel
300 W + 300 W (at 4 Ω, 100 Hz, 1% THD)
RMS output power (reference):
High channel
500 W + 500 W (per channel at 4 Ω, 1 kHz)
Low channel
500 W + 500 W (per channel at 4 Ω, 100 Hz)
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.
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.
MP3 (MPEG 1 Audio Layer 3) is a standard format defined by ISO/MPEG which compresses audio data. MP3 audio tracks must be in MPEG 1 Audio Layer 3 format.
A logical format of files and folders on CD-ROMs, defined by ISO (International Organization for Standardization).
This is a recording method that enables adding of data using the Track-At-Once method. Conventional discs begin at a disc control area called the Lead-in and end at an area called Lead-out. A Multi Session disc is a disc having multiple sessions, with each segment from Lead-in to Lead-out regarded as a single session.
REPLACING THE IC102 AND IC4605 ON THE DMB21 BOARD
IC102 and IC4605 on the DMB21 board cannot exchange with single. When these parts on the DMB21 board are damaged, exchange the entire mounted board.
REPLACEMENT OF THE MS-214 BOARD
When the MS-214 board is defective, exchange the entire MD (AU) ASSY.
HOW TO EJECT THE DISC WHEN POWER SWITCH TURNS OFF
Note:
 take out the CD mechanism block from a set.
Disassembly
 PANEL TEST MODE
This mode is used to check the fluorescent indicator tube, LEDs, keys, [MASTER VOLUME] jog, model, destination and software version.
Procedure
1. Press [SEARCH] button and [OPTIONS] button simultaneously and hold 3 seconds.
2. All LEDs and segments in fluorescent indicator tube will light up.
3. When you want to enter to the software version display mode, press [FLANGER] button. The model information appears at the fluorescent indicator tube. Press [FLANGER] button again to view the destination information.
4. During the destination information display, press [FLANGER] button. Each time [FLANGER] button is pressed, the fluorescent indicator tube shows the version of each category software in the following sequence: SC, MTK (DMB Board firmware version), UI, PF, SYS, CD, CDMA, CDMB, ST, TA, TAS, TM and return back to model information display.
5. When [SEARCH] button is pressed while the version numbers are being displayed except model and destination, the date of the software creation appears. When [SEARCH] button
is pressed again, the display returns to the software version display.
6. Press [ISOLATOR] button, the key check mode is activated.
7. In the key check mode, the fluorescent indicator tube displays “K 0 V0”. Each time a button is pressed, “K” value increases.  However, once a button has been pressed, it is no longer taken into account.
“V” value increases in the manner of 0, 1, 2, 3 ... if [MASTER VOLUME] knob is turned clockwise, or it decreases in the manner of 0, 9, 8, 7 ... if [MASTER VOLUME] knob is turned counterclockwise.
8. When [SOUND FLASH] button is pressed after all LEDs and segments in fluorescent indicator tube light up, alternate segments in fluorescent indicator tube and LEDs would light up. If you press [SOUND FLASH] button again, another half of alternate segments in fluorescent indicator tube and LEDs would light up. Pressing [SOUND FLASH] button again
would cause all segments in fluorescent indicator tube and LEDs light OFF. Pressing [SOUND FLASH] button again would cause all segments in fluorescent indicator tube and all LEDs light up.
9. To release from this mode, press the [SEARCH] button and [OPTIONS] button in the same manner as step 1, or disconnect the power cord.
COMMON TEST MODE
This mode is used to check operations of the Amplifier section.
Procedure
To enter Common Test Mode
1. Press [USB/USB SELECT] button and [PRESET EQ] button simultaneously and hold for 3 seconds.
2. The upper segments of fluorescent indicator tube will blink.  The function is changed to TV and the volume is changed to VOLUME MIN.
Check of Amplifier
1. Press [PRESET EQ] button repeatedly until a message “GEQ MAX” appears on the fluorescent indicator tube. GEQ increases to its maximum.
2. Press [PRESET EQ] button repeatedly until a message “GEQ MIN” appears on the fluorescent indicator tube. GEQ decreases to its minimum.
3. Press [PRESET EQ] button repeatedly until a message “GEQ FLAT” appears on the fluorescent indicator tube. GEQ is set to flat.
4. When the [MASTER VOLUME] knob is turned clockwise even slightly, the sound volume increases to its maximum and a message “VOLUME MAX” appears on the fluorescent indicator tube.
5. When the [MASTER VOLUME] knob is turned counterclockwise even slightly, the sound volume decreases to its minimum and a message “VOLUME MIN” appears on the fluorescent indicator tube.
To release from Common Test mode
1. To release from this mode, press POWER button.
2. The cold reset is enforced at the same time.
COLD RESET
The cold reset clears all data including preset data stored in the EEPROM to initial conditions. Execute this mode when returning the set to the customer.
Procedure
1. Press the POWER button to turn on the system.
2. Press the STOP button and POWER  button simultaneously for 3 seconds.
3. “COLD RESET” appears on the fluorescent indicator tube.  After that, the fluorescent indicator tube becomes blank for a while, and the system is reset.
TUNER STEP CHANGE
The step interval of AM channels can be toggled between 9 kHz and 10 kHz. This mode is not available for Saudi Arabian, European and Russian models.
Procedure
1. Press POWER button to turn on the system.
2. Press [FUNCTION] button repeatedly to select the “AM”.
3. Press POWER button to turn off the system.
4. Press [ENTER] button and POWER button simultaneously. The system turns on automatically. The message “AM 9K STEP” or “AM 10K STEP” appears on the fluorescent indicator tube and thus the channel step is changed.
CD SHIP MODE (WITH MEMORY CLEAR)
This mode moves the optical pick-up to the position durable to vibration and clears all data including preset data stored in the data flash to initial conditions during the next AC-In. Use this mode when returning the set to the customer after repair.
Procedure
1. Press the POWER button to turn on the system.
2. Select CD function and without dics inserted.
3. Press [EJECT] button and POWER button simultaneously for 3 seconds. The system turns off automatically.
4. A message “MECHA LOCK” is displayed on the fluorescent indicator tube and the CD ship mode is set.
CD SHIP MODE (WITHOUT MEMORY CLEAR)
This mode moves the optical pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair.
Procedure
5. Press POWER  button to turn on the system.
6. Select CD function and without dics inserted.
7. Press [CD] button and POWER button simultaneously. The system turns off automatically.
8. A message “MECHA LOCK” is displayed on the fluorescent indicator tube and the CD ship mode is set.
DISC THEFT PREVENTION MODE
This mode let prevent disc to be ejected. When this mode is activated, the disc will not eject when [EJECT] button is pressed.
The message “LOCKED” will be displayed on the fluorescent indicator tube. This mode only applied when there is disc.
Procedure
1. Press POWER  button to turn on the system.
2. Select CD function.
3. Press [PLAY/PAUSE] button and [EJECT] button simultaneously for 3 seconds. The message “LOCKED” or “UNLOCKED” displayed on the fluorescent indicator tube.
FACTORY PRESET
This mode is use to load all the factory use preset frequencies into FM 1-FM 20 and AM 1-AM 10. Originally, frequency of FM 1-FM 20 and AM 1-AM10 are set to the minimum frequency.
Procedure
1. Press POWER button to turn on the system.
2. Press [SEARCH] button and [TUNER/BAND] button simultaneously and hold for 3 seconds, message “FACTORY” appears on the fluorescent indicator tube. The function is changed to TUNER automatically.

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