Kenwood KVT-627DVDY Service Manual page 12

KVT-627DVD/627DVDY/717DVD
KVT-737DVD/747DVD/767DVD
QQ
3 7 63 1515 0
Ref. No. Application / Function
Q4 For fan 11V power supply
Q6 ANT-CONT SW
Q7 P-CONT SW
Q8~11 For P-CONT circuit control
Q12 BU detection SW
Q13 For EXT-AMP control
Q14 For surge voltage detection
Q15 For surge voltage detection
For ±9V power supply
Q50
For ±9V power supply
Q51
Q52 SW14V power supply SW
Q54 For BU5V power supply
Q55 A8V power supply SW
Q58 For BU5V power supply
Q59 For A8V power supply
Q61 V5V power supply SW
Q62 SW5V power supply SW
Q63 For SW5V power supply
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L 13942296513
Q64 For V5V power supply
For ±9V power supply
Q65~70
SVR6.8V, Audio 3.3V,
Q150
IC150 power supply SW
Q151 For SVR voltage reduction control
Q152 SVR6.8V, Audio 3.3V, IC150 power supply
Q200 For audio muting
Q201 For audio muting
Q202 For audio muting
Q203 For audio muting
Q204 For audio muting
Q205 For audio muting
Q206 For audio muting
Q207 For audio muting
Q208 For audio muting
Q209 For audio muting
Q250 AM power supply SW
Q252 For AM power supply
Q403,404 Audio selector control SW
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Q405,406 Audio selector control SW
Q500 For reversing resetting signal voltage
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COMPONENTS DESCRIPTION
For controlling output voltage
Comes on when TUNER source is selected
Goes OFF when STANDBY source is selected
Controlling P-CONT circuit
Comes ON power supply voltage is about 8.8V or more
Control of external amplifier
Comes ON when Q15 is ON
Comes ON when power supply voltage is about 20V or more
Comes ON when Q51 is ON
Comes ON when SW14V is ON
Comes on at P-ON
-
Comes ON when SW14V is ON
-
BU14V → 8V for audio is supplied
Comes ON when SW14V is ON
Comes ON at P-ON
BU5V → SW 5V is supplied
BU14V → 5V for video is supplied
Comes ON when SW14V is ON
Electric current control of SVR voltage reduction circuit
Power supply to IC150, voltage supply to Q151
Audio muting of pre-out front right channel
Audio muting of pre-out front left channel
Audio muting of pre-out rear left channel
Muting at momentary power down, resetting, and audio mute timing
Audio muting of pre-out rear right channel
Audio muting of pre-out center channel
Audio muting of pre-out sub-woofer channel
Audio muting of AVOUT right channel
Muting at momentary power down, resetting, and audio mute timing
Audio muting of AVOUT left channel
Comes ON when AM source is selected
Audio 8V is supplied when AM source is selected
Converts IC413 µ-com controlled terminal voltage: 5V → 8V
Converts IC414 µ-com controlled terminal voltage: 5V → 8V
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Reverses signal in order to obtain resetting signal for TV tuner
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2 9
8
Operation / Condition / Compatibility
Q Q
3 6 7 1 3 1 5
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.
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9