Kenwood kdc-5090r/ry Service Manual page 4

KDC-5090R/RY
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Ref.No. Component Name
Q29 DTA124EUA or KRA303
Q30 2SA1576A or 2SB1218A
Q33 2SC4081 or 2SD1819A
Q34 2SC4081 or 2SD1819A
Q42 DTC124EUA or UN5212
Q43 2SC4081 or 2SD1819A
Q45 DTC124EUA or UN5212
Q47 2SB1277(Q,R)
Q46 DTC124EUA or UN5212
Q48 2SB1277(Q,R)
Q51 DTC144EUA or UN5213
Q52 2SC4081 or 2SD1819A
Q55 2SA1576A or 2SB1218A
Q56 DTC124EUA or UN5212
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L 13942296513
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CD PLAYER UNIT (X32-5010-00)
Ref.No. Component Name
IC1 AN22000AA
IC2 MN662774KG1
IC4 BA5917AFP
IC6 NJM4565MD
Q1 MCH6101
Q2 DTC124EUA
Q3 DTA143XUA
Q4 2SA1362
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Q5 DTC124EUA
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COMPONENTS DESCRIPTION
Application/Function
P-CON. protection inhibit SW
P-CON. protection SW
BU detection SW
ACC detection SW
E. VOL mute SW
Noise buffer
FM +B SW
AM +B SW
IFC buffer
Composite signal output buffer
PAN 5V SW
Application/Function
RF amplifier
CD signal processor bult-in MI-COM.
4CH BTL driver
OP Amp.
APC
P ON SW
A.8V SW
D.5V SW
MOTOR SW
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Operation/Condition/Compatibility
Prevents Q30 tuning ON during start-up after power ON.
Protect Q32 by turning ON when P-CON output is grounded.
While BACKUP is applied, a base goes "Hi", and Q33 is
turned on. When momentary power down has detected,
a base goes "Lo", and Q33 is turned off.
While ACC is applied, a base goes "Hi", and Q34 is turned on.
When BU detection SW or MI-COM.'s mute is working,
a base goes "Hi", and Q42 is turned on.
When Q45's base goes "Hi", Q47 is turned on .
Works during FM reception mode.
When Q46's base goes "Hi", Q48 is turned on .
Works during AM reception mode.
Waveform shaping
While a panel is attached to the set,
Q56's base goes "Hi", and Q55 is turned on.
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Operation/Condition/Compatibility
Generation of RF signal based on the signals from the
APC circuit and pickup, and generation of servo error
(focusing error and tracking error) signals.
Detection of dropout, anti-shock,
track crossing and off-track conditions,
Gain control function building in.
Focusing coil, tracking coil, spindle motor and
sled motor driver
Low pass filter
LD power control
When CD source is selected, Q2's base goes "Hi",
Q3 and Q4 are turned on.
A8V ON/OFF control. When a base goes "Lo",
Q3 is turnde on.
D5V ON/OFF control. When a base goes "Lo",
Q4 is turnde on.
When CD loading or eject operation is activating,
Q5's base goes "Hi", Q4 is turned on.
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