Schematic Diagrams: 2022

Wednesday, December 14, 2022

JVC UX-S57 MICRO COMPONENT SYSTEM SCHEMATIC DIAGRAM

UX-S57 - CD-ROM No.SML200405

Block diagram

Printed circuit boards

Schematic diagrams

Sunday, November 13, 2022

Samsung LCD TV UB6V, UB7W Trouble shooting. No video, No sound, No power, No Video CVBS, No component

Samsung UE**B6000VWXXC, UE**B7000WWXXC, UE**B7020WWXXC-43 ,46 and 55 inch LCD TVs

Check List for Initial operation

Power cord in to the set
Power switch on
You can sound SMPS relay
* If you can’t sound, check the STB_5V appear at BD229 in main board Back-light on
* If back-light not on, check the main board power line And check the dimming cable Picture on or display the banner
* If display is nothing, check the LVDS cable And LVDS clk/data line

Inform to change the Assembly

Check the Side-Label Ver. in set (important)
Order to the item with Side-Label Ver.
If you change the item, see the service-bulletin for setting the factory option.

Inform about error messages

If set is connected internet and software is old version, popup below message.
“ version XXXXX is available, upgrade?”
And select OK, you can update your LCD TV.

Panel or Main?

No Power

No video analogue PC

No video HDMI

No video Tuner-CVBS

No video Tuner DTV

No video CVBS

No video Component

No sound

Sunday, October 16, 2022

JBL PARTYBOX 200, JBL PARTYBOX 300 Schematic

Applicable to:

JBLPARTYBOX200AS, JBLPARTYBOX200BR, JBLPARTYBOX200CN, JBLPARTYBOX200EU, JBLPARTYBOX200IN,
JBLPARTYBOX200JN, JBLPARTYBOX200RU, JBLPARTYBOX200AM
JBLPARTYBOX300AS, JBLPARTYBOX300BR, JBLPARTYBOX300CN, JBLPARTYBOX300EU, JBLPARTYBOX300IN,
JBLPARTYBOX300JN, JBLPARTYBOX300RU, JBLPARTYBOX300AM

SPECIFICATIONS

AC power input: 100-240V ~ 50/60Hz
DC power input: 12V 8A
Built-in battery: Li-ion 10.4Ah, 7.2V (PartyBox 300)
Power consumption: 60W
Standby power consumption: <2W with BT connecting;<0.5W without BT connecting
USB output: 5V 2.1A
Speaker drivers: 2 woofer + 3 tweeter
Speaker impedance: 4 ohm
Total output power: 120 W RMS

BLOCK DIAGRAM

G1-Block diagram

DC-DC CIRCUIT

BOOST CIRCUIT

MAIN BOARD CHARGE CIRCUIT-BQ24610

MAIN BOARD MIC CIRCUIT

AUDIO IN CIRCUIT

ADC5536 CIRCUIT

MAIN CHIP CIRCUIT-SPHE8107

MCU CIRCUIT

BT MODULE CIRCUIT

DSP CIRCUIT

CIRCUIT DIAGRAM-MAIN BOARD

AMP CIRCUIT

CIRCUIT DIAGRAM-TOP RGB LAMP RING BOARD

CIRCUIT DIAGRAM-BOTTOM RGB LAMP RING BOARD

Monday, August 29, 2022

Sony HCD SH2000 Mini Hi-Fi component system service adjustments, display and volume board schematic

HCD-SH2000 is the tuner, USB, CD and amplifier section in FST-SH2000/LBT-SH2000

NOTE OF 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.
NOTE OF REPLACEMENT OF THE MS-214 BOARD
When the MS-214 board is defective, exchange the entire MD (AU) ASSY.

MAIN BOARD DISCRIMINATION
In this set, the MAIN board has been changed in the midway of production.
Repair after distinguishing each type set to doing the repair referring to the following.

NOTE OF REPLACING THE IC103 AND C242 (Combination: TYPE B) ON THE MAIN BOARD (Suffix-12)
IC103 and C242 (Combination: TYPE B) on the MAIN board (Suffix-12) cannot exchange with single. When these parts on the MAIN board (Suffix-12) are damaged, remove IC103 and C242 (Combination: TYPE B) and replace with IC102 and C239 (Combination: TYPE A)

HOW TO EJECT THE DISC WHEN POWER SWITCH TURNS OFF or (No Power)
Note: Please take out the CD mechanism block from a set referring to “SECTION 2 DISASSEMBLY”.

SIDE PANEL A, SIDE PANEL B AND TOP PANEL SECTION disassembly

TEST MODE

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 on 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 counter clockwise.
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 counter clockwise 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 the 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 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 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

FM AUTO STOP CHECK

Procedure:
1. Turn the power on.
2. Input the following signal from Signal Generator to FM antenna input directly.
Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz

Deviation
Modulation
ANT input

: 75 kHz
: 1 kHz
: 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. 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”.

Display board schematic