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Tuner unit (X05-
Components
1C1 (LM7001)
1C4 (LA1245)
iC5 (M5218P)
1C6 (BA401)
IC7 (M5218P)
1/2
2/2
IC8 (M5218P)
1/2
2/2
IC9 (M5218P)
IC 14 (NJM4560D)
1C15 (LA3350S)
IC 16 (uPC78L12J)
IC17 (NJIM4560D)
1C18 (MC1495L)
IC19 (M5218P)
IC20 (NJM4560D)
1/2
2/2
IC21 (NJM4560D)
1/2
2/2
1C22 (M5231TL)
1C23 (uPC7805HF)
3420-11)
Use/Function
Generates REC CAL signal (400Hz)
120kHz noise tuning amplifier.
Operation/Condition/Interchangeability
Reference frequencies FM: 25kHz/50kHz, AM: 9kHz/1 OkHz.
Noise amplifier
STOP detect
T meter control
Detects the TUNED
bandwidth in FM mode.
Linear multiplier.
38kHz generator (sine wave)
3-terminal regulator
MAIN signal buffer
SUB signal demodul
ator
Subcarrier buffer
Vrer=1.8V, for +15V.
5V (output 5.6V).
Regulator
3 -terminal regulator
IF-DET UNIT (X86-1020-02)
Q1
Q3,4
Q5
Q6
Q7
1C2,3 (BA401)
1C4 (uPC1163HA)
IC5 (LA1231NS)
Operation/Condition/Interchangeability
Switches over between REC CAL, AM, etc.
Turns ON to rise the gain when in the NARROW
mode.
Corrects distortion based on the auto stop signal input.
Use/Function
IF amplifier
PLL DET VCO
FM signal switching
Gain control
DCC ON-OFF switching
IF amplifier
IF amplifier
IF system
IC6 (NJIM4560D)
1/2
2/2
PLL DET DC amplifier
FM/AM signal amplifier
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