JVC MX-GA8 - Timer Functions: Daily Timer; Setting the Daily Timer; Daily Timer Operation Steps

1-26 (No.MB080)
5.2 Tuner Malfunction(FM/AM) : COMMON
Main board
CW102 PIN NO2, 9V
Voltage normal?
ICO1(LV23000)of tuner board,
Tuner BAND Switching?
(pin29)
ICO1(LV23000)
VT Level Changeable?
(pin28)
ICO1(LV23000)
if input normal?
(pin 1,4)
Check the Main board
EZD02, ER104.
Check the Tuner board
ICO1(LV23000)
pin 15,16,17,18
Check the Frpnt board
UIC01(micon -com)
Check the Front board
ICO1(LV23000) Oscillator
XTAL(75KHz)
Check the Tuner board,
FM pack,MW OSC,
MW ANT.
Check the Main board
EIC01(TDA7442D) Function IC
No
No
No
No
Yes
Yes
Yes
Yes