Switch Unit (X16-2502-70) - Kenwood KRC-597 Service Manual

Ref. No. Application / Function
Q4 SW 5V
Power-Antenna
Q5
Detection
Q6 P-CON Detection
Main Motor SW q
Q51
Main Motor SW w
Q52
Q53 Sub Motor AVR
Q54 MSTC SW
Q101 Composite signal buffer
Q151 DSI Driver
Q152 Panel 5V SW
Q201 Noise buffer
Q350 Pre Mute SW
Q351 Pre Mute SW
Q352 Pre Mute SW

SWITCH UNIT (X16-2502-70)

Ref. No. Application / Function
IC1 LCD Driver
IC2 Remote Control IC
Q1,4 REMO ON SW
Q2 Key Illumination SW (Green)
Q3 Key Illumination SW (Red)
COMPONENTS DESCRIPTION
ON when the base is "L".
"H" when P-ANT output is short-circuit (P.ANT OFF).
"L" when FM/AM signal does not exist.
"H" when P-CON output is short-circuit.
Outputs 14V when the base is "L".
Q51 turns ON when the base is "H".
Output 3.6V when the base of Q4 is "L".
ON when the base is "H".
DSI lights when the base is "L". DSI turns off when the base is "H". DSI turns on and off when
panel is taken off.
When the panel is attached, the base goes "L", turning the Tr ON to supply 5V to the panel.
When panel is taken off, panel 5Vcut off.
Drives the Pre Mute sw (Q351~354) when the base is "L".
Mutes the Rear Lch when the base is "H".
Mutes the Rear Rch when the base is "H".
Drives LCD
Controls the unit
The power supply of IC2 is turned on when base level goes "L".
Lights Green key-illumination when base level goes "H"
Lights Red key-illumination when base level goes "H"
KRC-597/597Y
Operation / Condition / Compatibility
Operation / Condition / Compatibility
5