How to enter service mode - Samsung SCX-4600 Samsung SCX4632 Laser Printer – Error Codes and details

Tech Mode [Service Mode] – EDC Mode – Firmware upgrade – Error Messages and details – How to remove the document jam - Samsung Laser printers SCX4600 – SCX4632

In service (tech) mode, the technician can check the machine and perform various test to isolate the cause of a malfunction. While in Tech mode, the machine still performs all normal operations.

To enter the Tech Mode

To enter the Tech Mode, press the buttons as following

4 in 1 Model: “ Menu > # > 1 > 9 > 3 > 4 > Menu ” [SCX-4623 series]

3 in 1 Model: “Menu > ID Copy > Left > Right > Menu > Back” [SCX-4600 series]

And the LCD briefly displays ‘Tech Mode’, the machine has entered service tech mode.
After entering the tech mode, select the item you want by using a button on control panel.

Data Setup

Send Level
You can set the level of the transmission signal. Typically, the Tx level should be under -12 dBm.
Caution : The Send Fax Level is set at the best condition from factory. Never change settings arbitrarily.

DTMF Level
This is a setting value of the High level tone and low level tone at DTMF mode. (Not dial mode)

Pause Time
It shows the delay time when receiving the pause input at auto dial.

Dial Mode
This function can choose dial method.
*Default : Dial (Dial/Pulse).

Modem Speed
You can set the maximum modem speed. However, outbound communication is switched automatically to match the standard of the receiving fax. Therefore, when communicating with a lower speed modem, the outbound communication speed will be set to low. This will allow for better transmission/reception by the receiving fax. It is best set 33.6Kbps as default setting.

Error Rate
When the error rate is about exceed the set value, the Baud rate automatically adjusts to 2400 bps. This ensures that the error rate remains below the set value. You can select the rate between 5% and 10%.

Clear All Memory
The function resets the system to factory default settings. This function is used to reset the system to the initial value when the product was functioning normally. All the values are returned to the default values, and all the information, which was set by the user, will be erased.
NOTE: Always perform a memory clear after replacing the main board. Otherwise, the system may not operate properly.

Toner Low Level

The function is to set up the time to inform toner low status. This function can provide user convenience for replacing the toner cartridge.

Clear Count

This function resets Total Page Count, Flatbed Scan Count, ADF Scan Count.

Engine Footer

This function is for monitoring the engine status. If you perform this function, at printing, the setting value for engine is shown on the bottom of the printed page.

Machine Test

Switch Test

Use this feature to test all keys on the operation control panel. The result is displayed on the LCD window each time you press a key.

Test Param Set (Handset Model only)

You can set the parameter for handset standard.

Caution: The parameter value is set at the best condition in the shipment from factory.

Modem Test
Use this feature to hear various transmission signals to the telephone line from the modem and to check the modem. If no transmission signal sound is heard, it means the modem portion of the main board has malfunctioned.

Dram Test
Use this feature to test the machine’s DRAM. The result appears in the LCD display. If all memory is working normally, the LCD shows << O K >>ROM TEST
Use this feature to test the machine’s ROM. The result and the software version appear in the LCD display.
• FLASH VER : 1.00 V
• ENGINE VER :1.00V

Shading Test
This function is to get the optimum scan quality out of the CCD(Charge Coupled Device).
If the copy image quality is poor, perform this function to check the condition of the CCD unit.

Restart Machine
You can reboot the machine by using a key without mechanically rebooting.

Report

Configuration Report

This report shows the status of the user-selectable options. You may print this list to confirm your changes after changing settings.

Supplies Information Report

This report shows the status of toner cartridge. This report includes toner remaining, average area coverage, installed date etc.

EDC Mode

The EDC Mode is used to independently control and test each sensor and driver component, so as to more easily service the printer.

Method to enter

After turn on the system power, check the “Ready” message on the LCD.

2. To enter the EDC Mode, Push the buttons outlined below in the order outlined.
“Menu > Stop > Left arrow > Back > OK > Right arrow”

3. The message “COMPONENT TEST Press Menu Key” display on the LCD.

4. To get out [EXIT] of the EDC Mode, Press the “Stop” key.

EDC Mode Menu

Cover Status

Front Cover:  When the front cover opened, “Open” message display LCD. If the front cover closed, “Closed” message display LCD.

Sensor Status

0. Regi/Feed/Exit Sensor:

 Manually open and close the actuator of the sensor [Regi, Feed, and/or Exit Sensor] you wish to check, the message “Without Paper” and “With Paper” message will be displayed.

1. Empty:

 Manually open and close the actuator of the Empty Sensor, the message “Present” and “Empty” message will be displayed.

2. Motor Test

Main Mtr Nor:  If “OK” key is pushed after “ON” displayed, motor will be run. Main motor will auto - stop after 60 seconds and ”OFF” message will be displayed.

Slow:  If “OK” key is pushed after “ON” displayed, motor will be slowly run.  Main motor will auto - stop after 60 seconds and ”OFF” message will be displayed.

3. Fan Test

Fuser Fan:  If “OK” key is pushed after “ON” displayed, fan will be run. Fuser fan will auto - stop after 10 seconds and ”OFF” message will be displayed.

4. Clutch Test

Pick up Clutch:   When “OK” key is pushed after ”ON” message displayed, clutch turns on.  Pick up Clutch will be turn off after 3 seconds and ”OFF” message will be displayed.

Regi Clutch:   When “OK” key is pushed after ”ON” message displayed, clutch turns on.  Regi Clutch will be turn off after 3 seconds and ”OFF” message will be displayed.

5. Fuser Ctrl

Temp Control:  Fuser on and off. “ON” is selected, fuser will be active and display the fuser temperature [XXX] but “OFF” is selected, fuser will be stop.

Fuser Temp:  Fuser temperature displayed on LCD (example: [170] )

6. LSU Control

LD Power:  When “OK” key is pushed after ”ON” message displayed, ”OFF” message will be displayed after 10 seconds
LSU Motor:  If “OK” key is pushed after “ON” displayed, motor will be run. LSU motor will auto - stop after 10 seconds and ”OFF” message will be displayed.
LSU Ready:  If “OK” key is pushed after “ON” displayed, motor will be run. ”1” message will be displayed.
Hsync:  If “OK” key is pushed after “ON” displayed, motor will be run. ”1” message will be displayed.

7. DEV Control

THV (+):  If “OK” key is pushed after “ON” displayed, THV (+) will be turned on.
THV (-):  If “OK” key is pushed after “ON” displayed, THV (-) will be turned on.
Dev Bias:  If “OK” key is pushed after “ON” displayed, Dev Bias will be turned on.
MHV Bias:  If “OK” key is pushed after “ON” displayed, MHV Bias will be turned on.

ACRONYMS AND Explanation

DEV – Developing High Voltage

EDC – Embedded Diagnostic Control

F/W – Firmware

HVPS – High Voltage Power Supply

H/W – Hardware

LD – Laser Diode

LSU – Laser Scanning Unit

MHV – Main High Voltage (Charge Voltage)

OPC – Optical Photo Conductor

SCF – Second Cassette Feeder

THV – Transfer High Voltage

Firmware Upgrade

USB and Network port are used to update the firmware.

Network applications (SWAS, SWS) can be used to update the firmware.

Normal Update

Send ROM file via USB, network port in Ready state.  It will automatically update and reset.

Special Mode Update

1. Power On While Pressing “Stop / Clear” Button.

- It displays download mode message.

2. Send ROM file via USB.

3. It will automatically update and reset.

* You can refer to the F/W Version Info. by pressing “ Menu > # > 1 > 9 > 3 > # ”

* If the machine is still not fyou cannot necessary you should perform factory clearing

“ Menu > # > 1 > 9 > 3 > Start ” (SCX-4623series)

“ Menu > ID Copy > Left > Right > Menu > Start ” (SCX-4600series) after updating Rom file.

Note : All of count values and data saved in MFP will be cleared.

Defective Images and reasons

If an image defects appears at regular intervals on the printed-paper, it is due to a faulty or damaged roller.
Refer below and check the condition of the appropriate roller.

Faulty Toner Cartridge

OPC Drum:  75.6mm:  White and Black Spots
Developing Roller:   35mm:   White spot, Horizontal black band
Charging Roller:   37.5mm:   Black Spot and line and periodic band
Supply Roller:   49mm:   Periodic Band by little difference of density.

Faulty transfer roller

Transfer Roller:  47mm:   Ghost, Damaged image by abnormal transfer roller.

Faulty pressure roller

Pressure Roller:  75.4mm:   Background.

Faulty fuser roller

Fusing Roller:  77.5mm:   Black spot and image ghost.

Error Messages

Messages appear on the control panel display to indicate the machine’s status or errors. Refer to the tables below to understand the messages’ and their meaning, and correct the problem, as is necessary.

Checking display messages

If a message is not in the table, reboot the power and try the printing job again.
Some messages may not appear in the display depending on the options or models.
[error number] indicates the error number.
[tray type] indicates the tray number.
[media type] indicates the media type.
[media size] indicates the media size.
[color] indicates the color of toner or imaging unit.

 [COMM. Error]:   The machine has a communication problem.

Ask the sender to try again.

[Incompatible]:  The machine has received a fax which is registered as a junk fax.

The received fax data will be deleted. Reconfirm junk fax setup.

[Line Error]:  Your machine cannot connect with the receiving fax machine or has lost contact because of a problem with the phone line.

Try again. If the problem persists, wait an hour or so for the line to clear and try again. Or, turn the ECM mode on.

[No Answer]:  The receiving fax machine has not answered after several redial attempts.

Try again. Make sure that the receiving machine is operational and has paper.

[Stop Pressed]:  Stop/Clear has been pressed during an operation.

Try again.

ADF COVER OPEN ERROR

The ADF cover is opened. Close the ADF cover.

BOOTP problem Auto IP Run

The IP address assignment is failed.  This happens, when Auto IP for BOOTP is set in SyncThru Web Service.

Change the IP address assignment method to DHCP or Static. If you do not change this option, the BOOTP server continually asks to assign the IP Address.

BOOTP problem Reconfigure DHCP

The IP address assignment is failed.  This happens, when Auto IP for BOOTP is not set in SyncThru Web Service.

Change the IP address assignment method to DHCP or Static. If you do not change this option, the BOOTP server continually asks to assign the IP Address.

DHCP problem Reconfigure BOOTP

The IP address assignment is failed. This happens, when Auto IP for DHCP is set in SyncThru Web Service.

Change the IP address assignment method to BOOTP or Static. If you do not change this option, the DHCP server continually asks to assign the IP Address.

DHCP problem: Auto IP Run

The IP address assignment is failed.  This happens, when Auto IP for DHCP is not set in SyncThru Web Service.

Change the IP address assignment method to BOOTP or Static. If you do not change this option, the DHCP server continually asks to assign the IP Address.

Document Jam. Remove Jam

The loaded original has jammed in the ADF.

Open the ADF cover and clear the jam.

How to remove the document jam

Clearing Original Document Jams

When an original jams while passing through the document feeder, a warning message appears on the display screen.

1. Remove any remaining originals from the document feeder.
2. Open the document feeder cover.
3. Gently remove the jammed original from the document feeder.
* If you see no paper in this area, go to step 5.
4. Close the document feeder cover. Reload the originals you removed, if any, in the document feeder.

5. Open the scanner lid

6. Gently remove the original from the feed area by carefully pulling it to the right using both hands.

7. Close the scanner lid. Load the removed pages back into the document feeder.
Note: Ensure the number of originals you place in the ADF does not exceed its tray capacity

Door Open. Close it
The front cover is not securely latched.
1. Close the cover until it locks into place.
2. Enter the EDC mode and check the cover status.

Error #02-000~2  Turn off then on
A fuser error has occurred.

1. Turn the printer off and back on to continue.

2. Reconnect the cable between the fuser and SMPS board.

3. Remove the fuser and re-install it.

4. Check the thermostat. If it is defective, replace it.

5. If error persists, replace the fuser.

6. If error persists, replace the SMPS/HVPS board.

Error #04-002 Turn off then on
LSU error has occurred

1. Enter the EDC mode. [instructions to enter EDC mode given above]
2. Execute the LSU test.
3. If the LSU does not operate, replace it.

Install Toner Install it
The toner cartridge is installed improperly, or not installed.
Reinstall the toner cartridge two or three times to confirm it is seated properly. If the problem persists, the toner cartridge is not being detected.

Memory Full Remove Job

The memory is full.

Press the left/right arrow to highlight Cancel or Start, then press OK. If you select Cancel , the machine stops the fax job. If you select Start, the machine only sends scanned documents of the fax job.

Network Problem: IP Conflict
The IP address is used elsewhere.

Check the IP address or obtain a new IP address.

Not Compatible Toner cartridge
The indicated toner cartridge is not suitable for your machine.
Install the corresponding toner cartridge with a Samsung-genuine cartridge.

Output bin Full Remove paper
The output tray is full.
Or the sensor is not facing down.
Remove papers from the output tray, the machine resumes printing. Or make sure the sensor is facing down.

Paper Empty in Tray1
There is no paper in the indicated tray.

1. Load paper in the tray.
2. If the message does not clear, enter the EDC mode and check the empty sensor. Replace empty sensor if defective.

Paper Jam in exit area
Special print media has jammed in the paper exit area.
Clear the jam.
2. If the message does not clear, enter the EDC mode and check the exit sensor. Replace exit sensor.

Paper Jam in MP Tray
Paper has jammed in the manual tray area.
 1. Clear the jam.
2. If the message does not clear, check the following.
- If pick up roller does not rotate and paper does not feed, check the pick up clutch.
3. If Pickup roller is rotating but the paper is not feeding, replace the pick up rubber.
4. Check the feed sensor in EDC mode. If it is defective, replace it.

Paper Jam in Tray1
Paper has jammed in the tray1 area.

1. Clear the jam.
2. If the message does not clear, check the following.
- If pick up roller does not rotate and paper does not feed, check the pick up clutch.
3. If Pickup roller is rotating but the paper is not feeding, replace the pick up rubber.
4. Check the feed sensor in EDC mode. If it is defective, replace it.

Paper Jam inside machine
Paper has jammed inside the machine.
1. Clear the jam.
2. If the message does not clear, check the feed sensor or exit sensor.  Replace the defective sensor.

Prepare new cartridge
Small amount of toner is left in the indicated cartridge. The cartridge is getting low on toner.
Prepare a new cartridge for a replacement. You may temporarily increase the printing quality by redistributing the toner.

Replace new cartridge
The cartridge is almost empty.

Replace the toner cartridge for the best print quality when this message appears.

Replace Toner

The cartridge is out of toner. Replace the toner cartridge with a Samsung-genuine toner cartridge.
Self Diagnostics Please wait
The engine in your printer is checking some problems detected.  Please wait a few minutes.
Sleeping... The machine is in the power save mode.
When data is received, it switches to on-line automatically.
Too many Faxes Remove Job
Too many faxes are received. Remove received fax.

Samsung MFP SCX-4600 - SCX-4623 series - How to clear the paper jam fault Mono Laser printer

SCX-4600/SCX-4623 series [3 in 1] - SCX-4600/4623 Series [4 in 1] Samsung Laser Printer – How to handle the Paper Jam fault – Probable reasons for Paper-Jam.

Paper Feeding With Toner Cartridge Sensing
  When the lead edge of the paper is detected by the Feed Sensor (photo interrupter), it begins the development process of the drum after a predetermined time.  A paper jam condition is detected if the lead edge of the paper is not detected by the feed sensor within 1sec.after the initialization of paper feed; then the LED warning light will be display (RED color).  
  The toner cartridge detection is monitored by the CRUM sensors. If all of the CRUM sensors are off, the CPU knows the cartridge is not in the machine, and takes appropriate action by turning on the out of toner light. If the CRUM sensors do not detect that the correct cartridge is inserted, the CPU will display the toner cartridge is invalid, it will show invalid sign on a LED.  If feeding from a cassette, the drive to the pickup roller is controlled by a solenoid. The on/off time the solenoid is controlled by Main PBA. The Paper Jam protocols are as follows:

Jam-0

- After picking up, paper cannot be entered due to paper is not fed.

- After picking up, paper does not reach the Feed Sensor in after a predetermined time due to paper slippage, etc.

- After picking up, if the Feed Sensor does not detect paper after a predetermined time following the initialization of another take-up retry.

* It is a status that the leading edge of the paper doesn’t pass the feed sensor.

- Even though the paper reaches to the feed sensor, the feed sensor doesn’t be ON.

* It is a status that the leading edge of the paper already passes the feed sensor.

Jam-1

- The trailing edge of the paper must clear the Feed Sensor after predetermined time.  (The feed sensor cannot be OFF)

- The leading edge of the paper must detect the Exit Sensor within a predetermined after leaving the Feed Sensor. (The exit sensor cannot be ON)

* The paper exists between the feed sensor and the exit sensor.

- The trailing edge of the paper must clear the Exit Sensor after predetermined time.

Jam-2

- The trailing edge of the paper must clear the Exit Sensor after predetermined time.

Tips for avoiding paper jams

> Ensure that the adjustable guides are positioned correctly.

> Do not overload the tray. Ensure that the paper level is below the paper capacity mark on the inside of the tray.

> Do not remove paper from the tray while your machine is printing.

> Flex, fan, and straighten paper before loading.

> Do not use creased, damp, or highly curled paper.

> Do not mix paper types in a tray.

> Use only recommended print media.

> Ensure that the recommended side of the print media is facing down in the tray, or facing up in the manual tray.

Clearing paper jams

When a paper jam occurs, a warning message appears on the display. To resume printing after clearing paper jams, you must open and close the front door.

1. Open and close the front door. The jammed paper is automatically ejected from the machine.  If the paper does not exit, go to the next step.

2. Pull out tray 1

If the paper does not move when you pull, or if you do not see the paper in this area, check the fuser area around the toner cartridge.

4. Insert tray 1 back into the machine until it snaps into place. Printing automatically resumes.

In the manual tray

1. If the paper is not feeding properly, pull the paper out of the machine.

2. Open and close the front door to resume printing.

Inside the machine

1. Open the front door and pull the toner cartridge out, lightly pushing it down.

2. Remove the jammed paper by gently pulling it straight out.

3. Replace the toner cartridge and close the front door. Printing automatically resumes.

In exit area

1. Open and close the front cover. The jammed paper is automatically ejected from the machine.  If you do not see the jammed paper, go to next step.

2. Gently pull the paper out of the output tray.

If you do not see the jammed paper or if there is any resistance when you pull, stop and go to the next step.

3. Open the rear cover.

4. Pull the pressure levers down and remove the paper.
Return the pressure levers to their original position.

If you do not see the jammed paper, go to next step.

5. Pull the fuser covers levers down and remove the paper.  Return the pressure levers to their original position.  If you do not see the jammed paper, go to next step.

6. Close the rear cover.
7. Open and close front cover, printing automatically resumes.

Specs:

1. Print / Copy Speed:  23 ppm in letter
2. Processor:  Jupiter5 375 Mhz
3. Printer Language Emulations:  SPC, PCL-5 (4623FW)
4. Memory:  64 MB (4600/4623F)  128 MB (4623FN)  256MB (4623FW). 
5. Interfaces:  One USB port  One 10/100 Base TX network connector (4623FN)  One 802.11b/g/n wireless module (4623FW). 
6. Toner cartridge:  Initial : 0.7K / 1K. 
Sales : 1.5K / 2.5K two types7. ADF (4623 series)

Sony HCD-GTX777/GTX787/GTX888 - ELECTRICAL ADJUSTMENTS

TUNER SECTION [0 dB = 1 µV]
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)
[Use 75 ohm “coaxial cable” to connect SG and the set. You cannot use video cable for checking.  Use SG whose output impedance is 75 ohm.]
3. Set to FM tuner function and tune A, B and C signals.
4. Confirm “TUNED” is lit on the display for A, B and C signals.
[The mark of “TUNED” means “The selected station signal is received in good condition.”]
DECK SECTION [0 dB = 0.775 V]
Demagnetize the record/playback head with a head demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the parts adjust.
4. The adjustments should be performed with the rated power supply voltage unless otherwise noted.
5. The adjustments should be performed in the order given in this service manual. (As a general rule, playback circuit adjustment should be completed before performing recording circuit adjustment.)
6. The adjustments should be performed for both L-CH and RCH.
7. Switches and controls should be set as follows unless otherwise specified.
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
1. Perform these adjustments for Single deck
Mode: Playback
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.
4. After the adjustments, apply suitable locking compound to the parts adjusted.
Adjustment Location: Playback Head (Deck).
CD SECTION
TEST DISC LIST
Use the following test disc on test mode.
• CD: YEDS-18 (PART No. 3-702-101-01) or PATD-012 (PART No. 4-225-203-01)
1.CD Block is basically designed to operate without adjustment.  Therefore, check each item in order given.
2. Use YEDS-18 (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MW 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.

S-CURVE CHECK
1. Connect an oscilloscope to TP106 (FE) and TP124 (VC).
2. Turn the power on.
3. Load a disc (YEDS-18) and actuate the focus search. (In consequence of open and close the disc tray, actuate the focus search)
4. Confirm that the oscilloscope waveform (S-curve) is symmetrical between A and B and confirm peak to peak level within 3 ± 0.5 Vp-p.
Note: • Try to measure several times to make sure that the ratio of A : B or B : A is more than 10 : 7.  • Take sweep time as long as possible and light up the brightness to obtain best waveform.
RF LEVEL CHECK
1. Connect an oscilloscope to TP123 (RFO) and TP124 (VC).
2. Turn the power on.
3. Load a disc (YEDS-18) and playback.
4. Confirm that oscilloscope waveform is clear and check if RF signal level is correct or not.
Clear RF signal waveform means that the shape can be clearly distinguished at the center of the waveform.

How to disassemble HCD-GTX777 CD-Deck receiver

Disassemble procedure - Sony HCD-GTX777/GTX787/GTX888  CD-Deck receiver

Case – Top and Loading panel

Click on the pictures to magnify

CD block and Front Panel

Tape mechanism deck, Mic board, USB connector board, Panel board, Function board and Jog board

CD-SW board, Cover[CDM], TC board

Tuner pack, back panel section, sub transformer board

Main board, Power board, DC fan

Sub-woofer board, power board, Power transformer

BD93 board, Driver board, SW board, USB R board, Optical pick-up, Sensor board

Motor [TB] board, Motor [LD] board

Sony HCD-GTX777 - Error codes - power amplifier and sub-woofer amplifier circuit diagram

Sony HCD-GTX777- GTX787- GTX888 – Error codes – power amplifier and sub-woofer amplifier circuit diagram - STK412-150C – STK412-170C

HCD-GTX777/GTX787/GTX888 is the tuner, deck, CD and amplifier section in MHC-GTX777/GTX787/GTX888.

Front/Surround speaker
Power Output (rated): 190 W + 190 W (at 8 : and 24 :, 1 kHz, 1% THD, at LINK MODE)
RMS output power (reference)
295 W + 295 W (per channel at 8 : and 24 :, 1 kHz, 10% THD, at LINK MODE)
Subwoofer
RMS output power (reference)
160 W + 160 W (per channel at 6 :,100 Hz, 10% THD)

CD ERROR CODE MODE

Press STOP button, [DELAY] button and [DISC 1] button simultaneously to enter the error code display mode.

The fluorescent indicator tube displays the number of total error.

Each time >> button and << button are turned, display changes.

To clear the error record, operate the cold reset.

[The cold reset clears all data including preset data stored in the RAM to initial conditions.

Press STOP  button, [DELAY] button and POWER button simultaneously.

The fluorescent indicator tube becomes blank for while, and the set is reset.]

To release from this mode, press the POWER button or disconnect the power plug to turn the power OFF.

Display of total error

             [Em**Ed**]

Em** : The number of times for CDM (mechanical) errors.
Ed** : The number of times for BD error (after chucking the disc.).

Display of CDM (mechanical) error. It is show with “M” and 11 digit number.

            [M*$$%%&&0–000]

M* : The number of history error for mechanical. (“0” is latest one) (Turn >>| button to display next error.)

$$ : Mechanical errors occur in the operation.
FF : Mechanical error during normal operation.
Other : Mechanical error during initializing operation. 

%% : The process when trouble occurs

01 : Process ejecting DISC
02 : Process waiting for inserting DISC
03 : Process sending request to insert a disc to upper layer.
04 : Process sending request to eject a disc to upper layer.
05 : Process pulling a DISC in.
06 : Chucking process
07 : Re-chucking process
08 : Process cancelling chucking

&& : The operation when trouble occurs
00 : Waiting for operation.
10/11/12/13: During eject operation
20 : While pulling a disc in
30 : While cancelling chucking
40/41/42/43: During eject operation due to error.
0000 : Not used (Value is fixed to 0000).

Display of BD error. It is shown with “D” and 11 digits number.

          [D*$$%%&#00]

D* : The number of error history (“0” is latest one)

(Press > button to display next error.)

$$ : The detail of trouble

01 : Can not focus

02 : GFS error

03 : Start-up time over

04 : Continuously out of focus

05 : Q code is not input for certain time

06 : Tracking on is impossible

07 : Blank disc

%% : The process when trouble occurs

01 : While SHIP process is performed

02 : While POWER OFF is processed

03 : While INITIALIZE (POWER ON) is processed.

04 : While oscillation stops

05 : From stopping oscillation to start oscillation

06 : During stop

07 : During STOP operation

08 : While start-up is processed

09 : While TOC reading is processed

0a : During search operation

0b : During PLAY operation

0c : During pause operation

0d : During PLAY manual search operation

0e : During PAUSE manual search operation

&& : Processing operation when trouble occurs

Show each STEP mentioned in %% digits.

## : Disc speed when trouble occurs.

01 : x1 speed

02 : x2 speed (for models which support x2 speed)

04 : x4 speed

00 : Not used (value is fixed to 00).

CD MECHANISM Exploded view

Power board Schematic

Sub-woofer amplifier board – GTX-88

Power amp board HCD-GTX777/GTX787/GTX888  [STK412-150C – STK412-170C]

Jbl Media – 4 2-way 5" Powered Multimedia Speaker System circuit diagram - disassembly

Used ICs: NJM2902 – 4558 – TA8210AH

Removing the front grille:
The grille gasket is held in place by friction fit.  In the slot on the top between the grille gasket and the cabinet, place a wide flat tool and slowly begin to wedge the screen/gasket off.  Continuing to carefully wedge the grille off by working your way around the gasket..
You may wish to cover the tip of the flat tool you are using with cloth so as to minimize the damage, you may inflict on the cabinet.
Main body separation:
Unscrew the 6 screws around the perimeter of the baffle’s front surface.  Again, using caution to not damage the cabinet, place a flat tool in the side and bottom channels and slowly begin wedging the baffle off.  Note this assembly has areas of hot glue connecting the baffle and the cabinet together at the left and right side of the upper body.  Considerable effort may be needed.

Removing the rear terminal cup:
Pull the volume knob off.  Remove the 4 screws holding the rear terminal cup on.  Note this will release the internal air seal cup, containing the volume and the jack PCB assemblies from the air seal cup, you will need to cut the air seal on the cup surface to allow removal.
Heat sink and the main PCB removal
The heat sink is removed by unscrewing 4 screws connecting it to the cabinet housing.  The main PCB can be removed from the heat sink by unscrewing 2 screws from the back side of the main PCB into the heat sink and 2 screws through IC601 into the heat sink.  Do not unscrew this assembly, unless necessary.
Speaker removal:
The woofer can be removed by unscrewing 4 screws on the front of the baffle.  The tweeter can be removed by unscrewing 2 screws on the tweeter conncting it to the insdie of the baffle.
Slave speaker:
Removing the front grille:
The grille gasket is held in place by a friction fit.  In the slot on the top between the grille gasket and the cabinet, place a wide flat tool and slowly begin to wedge the screen/gasket off.  Continuing to carefully wedge the grille off by working your way around the gasket.  You may wish to covner the tip of the flat tool you are using with cloth so as to minimize the damage (scarring) you may inflict on the cabinet.
Main body separation:
Unscrew 6 screws around the perimeter of the baffle’s front surface.  Again using caution to not damage the cabinet, place a flat tool in the side and and the bottom channels and slowly begin wedging the baffle off.  Note this assembly has areas of hot glue connecting the baffle and the cabinet together at the left and right sides of the upper body.  Considerable effort may needed.
Removing the rear terminal cup:
Remove the 4 screws holding the rear terminal cup on.
Speaker removal:
The woofer can be removed by unscrewing the 4 screws on the front of the baffle.  The tweeter can be removed by unscrewing the 2 screws on the tweeter connecting it to the inside of the baffle.

Exploded view

Schematic