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Home >> AIWA >> XPV412AEZ/AK Service Manual
 
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AIWA XPV412AEZ/AK
Service Manual


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

Description of AIWA XPV412AEZ/AK 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 10 (click to view)
TEST MODE
The servo circuit of this model is designed to be adjustment-free and the adjustment value and disc distinction (CD-DA, CD-R and CDRW) etc. is adjusted by the IC. Therefore the adjustment is performed at each TOC reading. The adjustment conditions in the IC of each servo can be monitored in this test mode.

1. How To Start The Mode
OPEN/CLOSE SW SHORT LAND VC
Starting method of the test mode differ depending upon the type of disc being used. This is because the adjustment values of each servo also differ depending upon the type of disc. When using the CD-DA or CD-R 1) Short-circuit TEST LAND and OPEN/CLOSE SW land. 2) Insert the AC plug to the power outlet and install the CD-DA or CD-R disc. 3) Press the PLAY and STOP buttons in this sequence and read the TOC.

TE
S303

FE
IC502

When using the CD-RW 1) 2) 3) Short-circuit the TEST LAND and OPEN/CLOSE SW land. Insert the AC plug to the power outlet and install the CD-RW disc. Press the PLAY, STOP and DSL buttons in this sequence and read the TOC. The LCD should display “CD-r” at this point.

20 7 IC401

IC501

Note 1: If the TOC cannot be read, “ERR” has appeared on the LCD. The following step 2 and 3 can be verified even if the “TOC” cannot be read. Note 2: By repeatedly pressing the DISPLAY/ENTER button all the LCDs light up and the “TOC” display is repeated. Note 3: By repeatedly pressing the DSL button the LCD “CD-r” and “CD-d” are repeated.

RF

When the LCD displays “CD-d” ™CD-DA, CD-R is selected. When the LCD displays “CD-r” ™CD-RW is selected. Note 4: The test mode is canceled by disconnecting the AC plug and remove the soldering of short land.

2. DISC distinction (confirmation of the FE waveform)
IC451

IC601

This mode enables you to perform a confirmation of the disc distinction. Confirmation method Press the DSL button and select “CD-d” or “CD-r” (Refer to Note 3). 1) Install the disc. 2) Press the MODE button. The LCD will change as follows: Example: Test disc: TCD-782, DISC type select: CD-d Judgment value: 68, Measurement value: 37 CF

IC701

68
61 IC301

37 CF
Measurement value
LCD displays “CD-d” LCD displays “CD-r” No disc No disc CD-RW CD-DA and CD-R

* All numerical values are displayed in HEX.

Judgment value

What disc the IC has selected can be understood according to the judgment value. The decision standard of IC is as follows.

0 < Judgment value < 10

No disc CD-RW CD-DA and CD-R

TEST MODE SHORT LAND

10 < Judgment value < 32 32 < Judgment value < C8 C8 < Judgment value

The state of the FE waveform can be also understood from this judgment.

13

14

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