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SYNTHESIZER UNIT (X14 - 5400 -XX)
KRO-202/222/302/332/402/442
CIRCUIT DESCRIPTION
Use and Function
Operation and Condition
'| w-COM IC
ELECTRONIC VOLUME
'|
EQ amp/Electronic
VOL/NC MPX/CH !SO/T.ADV/METAL/BASS/TRE
POWER SUPPLY IC
PWR IC
DOLBY IC
CRSC SW
p-COM pin (60).
METAL SW
ON when u-COM (53) goes H.
IC2 MUTE SW
ON when u-COM (17) goes L.
PWR ON SW
ON when p-COM (58) goes L.
+
L.P.F.
| MUTE SW
ON when u-COM (17) goes L.
+
DSI SW
ON when u-COM (26) goes H.
PANEL VDD SW
ON when p-COM (45) goes L.
2-COLOR SW
ON when u-COM (24) (25) go H.
ILLUM +B SW
St
Q108 is turned ON when Q106 goes ON.
Q109 is turned ON when Q107 goes ON.
Q117
MOTOR SW
PLUNGER SW
MOTOR +B DRIVER
PLUNGER +B DRIVER
ILLUM +B DRIVER
ILLUM SW
PWR ANT SW
PWR ANT +B DRIVER
ON when u-COM (22) goes H.
ON when u-COM (21) goes H.
When Q110 goes ON,
Q112 is turned ON and mechanism motor starts rotation.
ON when Q111 goes ON.
When Q115 goes ON, Q114 is turned ON and illumination power is supplied
ON when p-COM (59) opens to turn Power supply IC (3) ON.
ON When u-COM (18) goes H.
When Q116 goes ON,
Q117 is turned ON and power is supplied to power antenna.
Q118
B-UP DETECT SW
ON when B-UP is detected.
Q119
SURGE DETECT SW
ON when Power supply IC (11) goes L.
Q120
HOLD DETECT SW
ON when u-COM (67) goes L.
Q121
HOLD SW
ON when Q118 goes ON. Puts n-COM in HOLD mode.
Q125
SVR CONTROL
ON when Q126 is turned ON by pt-COM (16) going L.
Q126
SVR SW
|_ ON when p-COM (16) goes L.
Q127
AMP STBY SW
ON when Q118 is turned OFF by power down.
Both AMP STBY and AMP MUTE go L.
Q201~204) PRE MUTE SW
ON when p-COM (17) goes L.
Q401
CD-CH MUTE SW
ON when CD CH MUTE goes H.
Q402
CD-CH RST SW
ON when Q@403 is turned ON by pressing CH RST buiton.
Q403
CD-CH RST SW
ON when CH RST button is pressed.
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