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KENWOOD KVT745DVD
Service Manual


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

Description of KENWOOD KVT745DVD 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 22 (click to view)
KVT-715DVD,725DVD/-B,735DVD KVT-745DVD,765DVD,815DVD

ADJUSTMENT
â Video Adjustment (X14-939, X35-428)
* VIDEO adjustments use an accessory remote controller. (The selector of the remote controller is set the Audio mode). 1. Enter the test mode : While pressing and holding the Eject key and SRC key, reset the unit. 2. The main menu screen of the test mode is operated and changed to the chroma IC adjustment mode. In this time, adjustment value appears on the displayed (lower right position). 3. Adjustment value is changed with 8 and 0 key (10 key) for remote controller. 4. Pressing PLAY/PAUSE key is fixed adjustment value of each item. If you can cancel adjustment value, press again PLAY/ PAUSE key. 5. Different item is chosen for 7 and 9 key (key) for remote controller. All item adjustment for step 3 to 5. 6. If all chroma adjustment is finished, pressing DIRECT key that adjustment value is written in EEPROM memory. Exit for adjustment mode when writing for EEPROM.

Adjustment No. item 1 VCO Free run 2 Chroma VCO

Measurement point TP307A

Adjustment Adjustment value part VR301 (X35-4280) Adjust VR301 so that HSY (IC301 9pin) frequency is set to 15,734kHz±10Hz (NTSC type), 15,625kHz±10Hz (PAL type). NTSC : 15.734kHz±50Hz, PAL : 15.625±50Hz Connect the TP-HD (R328 between R383) and TP-VD (R380 between R381) between to GND line.

Measuring instrument Frequency counter Frequency counter

IC303 32PIN

TEST mode CH16

3

BRIGHT

CN850 59pin (G OUT)

TEST mode CH6 TEST mode CH13 TEST mode CH5 TEST mode CH10 TEST mode CH2 TEST mode CH11 TEST mode CH12 TEST mode CH8

Adjust the amplitude value so that the waveform between the 1 step signal to the negative 1 step signal is 3.2V±0.05V. Adjust the amplitude value so that the waveform between the 8 step signal to the negative 8 step signal is 3.0V±0.05V. Fixed in adjustment value is 7F.

Oscilloscope

4

CONTRAST

CN850 59pin (G OUT)

Oscilloscope

5

BLACK LIMITER

CN850 59pin (G OUT) CN850 59pin (G OUT) CN850 59pin (G OUT)

Oscilloscope

6

WHITE LIMITER

Fixed in adjustment value is 7F.

Oscilloscope

7

Y GAIN

Adjust the amplitude value so that the waveform between the pedestal to the 9 step signal is 2.45V±0.05V. Adjust the amplitude value so that the waveform between the pedestal to the 2 step signal is 1.1V±0.05V. Adjust the amplitude value so that the waveform between the pedestal to the 10 step signal is 3.4V±0.05V. 1. Connect the oscilloscope to 58pin and 59pin between GND line. 2. It is adjusted so that red signal level bigger 0.1V±0.05V than green signal (for 1step signal).

Oscilloscope

8

GAMMA1

CN850 59pin (G OUT)

Oscilloscope

9

GAMMA2

CN850 59pin (G OUT)

Oscilloscope

10

R SUB BRIGHT

CN850 59pin (G OUT) CN850 58pin (R OUT)

Oscilloscope

11

B SUB BRIGHT

CN850 59pin (G OUT) CN850 60pin (B OUT)

TEST mode CH9

1. Connect the oscilloscope to 60pin and 59pin between GND line. 2. It is adjusted so that blue signal level bigger 0.1V±0.05V than green signal (for 1step signal).

Oscilloscope

22

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