Kenwood KVT-910DVD Service Manual page 49

X86 Circuit Adjustment Specification (E, W type)
Item
1. Divercity free-run
frequency
adjustment
VR1
2. Adjustment of audio
detection coil
L101
3. Adjustment of image
defection coil for
diversity
L103
www.manualscenter.com
ADJUSTMENT
Adjustment Method & Value
1. Connect frequency counter to Pin1 [IC2 #7] of CN5.
2. Connect CN53 Pin3 [IC2 #8] of CN5 and Pin2 [GND].
3. Adjust VR1 [15KHz] to 15625Hz ± 100Hz.
1. Input RF signal 70dBµ 9CH color bar to ANT input terminal.
2. Connect a voltmeter to TP [SIF] (both ends of R107) and
adjust L101 so that 0V ± 0.01V is achieved.
1. Input RF signal 70dBµ 9CH stair step to ANT input
terminal.
2. Observe the waveform of TP [VIDEO] (Q102 emitter R108),
using an oscilloscope. Adjust L103 so that the edges of
sync chip and pedestal are horizontal.
NG
KVT-910DVD/920DVD/930DVD/
940DVD/960DVD
OK NG
Condition
• ANT no signal
• PAL B/G
• P/S radio 10dB
• PAL B/G
• Turn color off.
51