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KENWOOD KVT940DVD
Service Manual


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

Description of KENWOOD KVT940DVD 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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Table of Contents
    • BLOCK DIAGRAM
    • DISASSEMBLY FOR REPAIR
    • COMPONENTS DESCRIPTION
    • MICROCOMPUTER'S TERMINAL DESCRIPTION
    • CIRCUIT DESCRIPTION
    • ADJUSTMENT
    • PC BOARD
    • SCHEMATIC DIAGRAM
    • EXPLODED VIEW
    • PARTS LIST
    • SPECIFICATIONS
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Text excerpt from page 48 (click to view)
KVT-910DVD/920DVD/930DVD/ 940DVD/960DVD

ADJUSTMENT
X86 Circuit Adjustment Specification (K, R, H type)
Item 1. Adjusting image detection coil L103 Adjustment Method & Value 1. Turn VR101 [RF-AGC] counter-clockwise as much as possible. 2. Impresss sDC2.0V to TP [IF AGC] (IC101 #36). 3. Input fo=45.75MHz Mod=1KHz AM60% Level=100dBµ to TP [IF] (CF1 #1). 4. Observe the waveform of TP [VIDEO] (IC101 #8) using an oscilloscope, and adjust L103 so that the output level is at the maximum.
Maximu

Condition ⢠ANT no signal ⢠If the waveform is clipped, raise the DC voltage somewhat. ⢠AC range

2. Adjusting audio detection coil L101

1. Turn VR101 [RF-AGC] counter-clockwise as much as possible. 2. Input fo=41.25MHz non-modulated Level=94dBµ to TP [IF] (CF1 #1). 3. Connect a voltmeter to TP [SIF] (both ends of R107) and adjust L101 to 0V ± 0.01V. 1. Turn VR101 [RF-AGC] to clock-wide direction as much as possible. 2. Input RF signal 30dBµ 11CH color bar to ANT input terminal. 3. Audio (P/S-6dB) non-modulated. 4. Connect a voltmeter to TP [IC101 #12] and adjustVR102 [SMET] to 3.5V ± 0.05V. 5. Set RF signal 70dBµ and adjust VR101 [RF-AGC] so that the value of the voltmeter connected to TP [IC101 #12] is 4.6V ± 0.05V. 1. Connect frequency counter to PIN1 of CN5 [IC2 #7]. 2. Connect Pin3 [IC2 #8] of CN5 and Pin2 [GND]. 3. Adjust VR1 [15KHz] and set to 15734Hz ± 100Hz.

⢠ANT no signal

3. Adjusting S-METER VR102 4. Adjusting RF AGC VR101

⢠SlideVR101 so that AGC will not be effective at 30dBµ. ⢠Be sure to conduct adjustment on the SMETER before adjusting RFAGC.

5. Diversity free-run frequency VR1

⢠ANT no signal

50

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