SONY ITB7
Service Manual

IT-B7

3-4. SCHEMATIC DIAGRAM � E, Singapore Model �

� IC Block Diagram U1 BA8206
VCC 1 AMP RSL 2 POWER SUPPLY WITH HYSTERESIS 8 OUT

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 � and 1/4 W or less unless otherwise specified. � C : panel designation. � U : B+ Line. � Power voltage is dc 12 V and fed with regulated dc power supply from JP1 with 100 � in series. � Voltage is dc with respect to ground under no-signal condition. no mark : OFF HOOK ( ) : ON HOOK � Voltages are taken with a VOM (Input impedance 10 M�). Voltage variations may be noted due to normal production tolerances. � Signal path. N : RX O : TX

7 HFI

LFI 3 LOW FREQ. OSC HIGH FREQ. OSC

6 HFO

LFO 4

5 GND

� 11 �

� 12 �