2-2. SCHEMATIC DIAGRAM

TMR-IF130/IF230R

r IC

BLOCK DIAGRAM
ADJ ON/OFF

IC11 TA2061AF-EL
L-CH OUT AGC AUTO AGC T/C (R) F0 ADJ (L)

16

15 VREF

14

13 LEVEL DET.

12

11

10

9

AGC

PRE EMPHASIS Lout = L + K • (L–R)

VCO

BUFFER

IN

Note: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. • All resistors are in Ω and 1/4 W or less unless otherwise specified. • % : indicates tolerance. • H : adjustment for repair.

Rout = R – K • (L–R)

• Power voltage is dc 9 V and fed with regulated dc power supply from external power voltage jack (J4). • Voltages are dc with respect to ground under no-signal conditions. • Voltages are taken with a VOM (Input impedance 10 MΩ). Voltage variations may be noted due to normal production tolerances. • Signal path. F : AUDIO J : RF

AGC MIX AMP LEVEL DET. O.S.M.
NF VREF

PRE EMPHASIS

R-CH L-CH

VCO

BUFFER

1

2

3

4

5
GND VCC

6

7
SURROUND ON/OFF

8
R-CH OUT

–5–

OFF T/C ON/OFF

–6–