- 2-11 -
FM (TUN1)
Check the +12V input of TUN1 B+ 6
Check the “High” Voltage of TUN1 VT 5
Check the OSC waveform of TUN1 Pin 8
Refer to “IC1 Troubleshooting”
Check the 12V of Q2 “E”
Refer to “Power
Circuit Trouble-
shooting”
Check the “LOW” of IC2 Pin 7
Refer to “IC2
Troubleshooting”
Replace the Q2
Replace the TUN1
Replace the TUN1
YES
YES
YES
YES
YES
NO
NO
IC1 Troubleshooting
Check the power supplying to pin8
Check the waveform of Pin 20, 21
Check the waveform output of Pin 16, 17
END
Refer to “Power Circuit
Troubleshooting”
Check the FM(TUN1) & AM(L2)
Replace the IC1
Replace the IC2
Check the “Low” of Pin 13
Refer to “IC2
Troubleshooting”
YES
YES
YES
YES
NO
NO
NO
NO
NO
Summary of Contents for FFH-164
Page 6: ... 1 6 MEMO ...
Page 20: ... 2 14 MEMO ...
Page 21: ...2 15 2 16 BLOCK DIAGRAM ...
Page 23: ...2 19 2 20 TUNER DECK SCHEMATIC DIAGRAM ...
Page 24: ... FRONT SCHEMATIC DIAGRAM 2 21 2 22 ...
Page 25: ... CDP SCHEMATIC DIAGRAM 2 23 2 24 ...
Page 27: ...PRINTED CIRCUIT DIAGRAMS MAIN TUNER P C BOARD SOLDER SIDE 2 27 2 28 ...
Page 28: ... MAIN TUNER P C BOARD COMPONENT SIDE 2 29 2 30 ...
Page 29: ... FRONT POWER P C BOARD SOLDER SIDE 2 31 2 32 ...
Page 30: ... FRONT POWER P C BOARD COMPONENT SIDE 2 33 2 34 ...
Page 31: ... 2 35 CD MAIN P C BOARD SOLDER SIDE ...
Page 32: ... 2 36 CD MAIN P C BOARD COMPONENT SIDE ...
Page 33: ... 2 37 INTERNAL BLOCK DIAGRAM OF ICs BU1923 BU1923F RDS RBDS decoder ...
Page 34: ... 2 38 BA3308 Dual preamplifier with ALC KA78R33 Low Dropout Voltage Regulator ...
Page 38: ... 2 42 KIA6225P S BIPOLAR LINEAR INTEGRATED CIRCUIT ...
Page 42: ... 4 2 MEMO ...
