Kenwood TK-230 Service Manual page 36

SEMICONDUCTOR DATA
MC3361D : FM JF (IF unit IC1)
¢ Block diagram
MIXER SCAN SQUELCH FILTER FILTER RECOVERED
OUTPUT INPUT AUDIO Input GND MUTE CONTROL IN
rel fe) fe) fs) fel [al fol [ol
lool | i
n vel OB
j Lo [PTAMe
SQUELCH TRIGGER WITH + la
HYSTERESIS =
DEMODULATOR
TT 4
MIXER LIMITER 1
AMP 10P
1.8K SOK s 52K
| OSCILLATOR] ew
Ww
4.8K
MIXER Vee LIMITER
CRYSTAL = =QUTPUT
osc
NJM2073M : AF power amplifier (AF PA unit IC1)
* Block diagram
« Terminal! connection diagram
OUTPUT 4 | 1 OQ 8} -INPUT A
7 [+INPUT A
5
E]
INPUT DECOUPLING
LT EET ECT Es
QUAD
COIL
3
OUT B
OUTPUT B [| fe ]+ineur ts)
GND [4 | [5 ]-ineur 8 4 2
GNO oT
BIAS
Vs
1
OUT.A
¢ Electrical characteristics
Item Symbol Condition MIN | TYP | MAX | Unit
Supply voltage Vs 1.8 15 Vv
Output power Po | THD = 10%, f = 1kHz Vs = 6V, RL = 160 0.8 w
Vs = 4V, Ri = 82 350 | 460 mW
Vs = 3V, Ri = 40 200 | 300 mW
Vs = 2V, Rt = 49 80 mw
THD = 1%, f = 40Hz ~ 15kHz, Vs = 4V, Ru = 8Q 380 mw
Distortion THD | Vs =4V, Po = 200mW, RL = 8Q, f = 1kHz 0.2 %
Voltage gain Gv_ | f= 1kHz 4) 44 | 47 | dB
Input impedance ZIN f = 1kHz 100 kQ
38 Power bandwidth (-3dB) | P.B | RL = 169, Po = 0.5W 130 kHz