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KENWOOD KDC-W7531
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of KENWOOD KDC-W7531 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 16 (click to view)
KDC-MP828/W7531/W7531Y/W8531 /W8531Y/X789/X8529/X889

TEST MODE
2. When entering the test mode, the manufacture code of the Flash ROM (4M) is read and when it is normal, FROMCHK of the 100th terminal (Panel µ-com) repeats Hi â Low â Hi · · ·. If the reading is abnormal, âLowâ is output. If the manufacture code is normal, by pressing [ ] key for less than 1 second, the connection checks on all terminal is started. If the connections are normal, the FROMCHK terminal stops the Hi â Low â Hi · · · repeating and outputs âHiâ. If the reading is abnormal, âLowâ is output. 3. With all lights turned on and by pressing [AM] key for at least 1 second, the data on the Flash ROM (4M) is initialized. While erasing the data, âData_Erase....â is displayed. Note : Do not touch any key white this is in progress. When erasing is complete, âErase_OK!!â is displayed. If âErase_NG!!!!!!â is displayed, it was not possible to erase the data on the Flash ROM (4M). In this case, pressing [AM] key for at least 1 second again. If it is the same, then there is an abnormality with the Flash ROM. ⢠While in the test mode, and at the same time, PM_DET of the 60th terminal (System µ-com) is H, the following will apply to the EJECT key, regardless of whether a disc is in the unit or not. Panel full OPEN/CLOSE is conducted with a push for less than 1 second. (Protection time : 3 seconds) As far as this item is concerned, eject will be achieved by for at least 1 second push on the EJECT key.

â Clearing backup memory and installer memory data (Clearing E2PROM data)
1. By pressing [ ] (NEXT) key and [ATT] key simultaneously, reset and start the unit. This will start the initialization processes for backup and installer memory data and the error log information of the CD mechanism. 2. When initialization is complete, the following display will be made. Normal completion CD_E2P___: AUDIO_E2P:

â Other
⢠At Power ON, âCODE_OFFâ, âCODE_ONâ displays will not be made. ⢠When sourcing STANDBY, by pressing [AUTO] or [TI] key for less than 1 second, GREEN/RED of the key illumination is switched. When doing this, the triangle illumination GREEN/RED is switched along with the key illumination. ⢠When staring up in the test mode, LINE MUTE prohibition time is set to 1 second instead of 10 seconds. ⢠While in the test mode, even when a DC offset error is detected, the detection information will not be written to the E2PROM. ⢠While in the test mode, even after an elapse of pre-set time, the backup memory items will not be written to the E2PROM. ⢠Information Clear mode for Test Mode, backup/installer memory, and CD mechanism error log. In the DC offset error detection information clear mode, DEMO mode operation will not be conducted. Also, in the above mode, the menu of the STANDBY source will not display DEMO ON/OFF switching items.

Abnormal ending 1 : backup/installer memory initialization : NG CD_E2P___: AUDIO_E2P:

Abnormal ending 2 : CD mechanism error log initialization : NG CD_E2P___: AUDIO_E2P:

Abnormal ending 3 : All initialization : NG CD_E2P___: AUDIO_E2P:

3. While in this mode, even after an elapse of a pre-set time, no backup memory items will be written to the E2PROM. 4. This mode is released by resetting. (What was on the last screen will not be retained.)

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