Endzone
Active Member
So far I've discovered a few problems (thanks to help from members on the board) that have been fixed:
1. D16, D17, & Q10 on tuner board defective causing tuner power supply to fail.
2. After much troubleshooting found out why the right channel would not work. In the tone control board there was a cracked solder joint on one side the balance control pot where the input signal entered. This was not visible with the tone control board installed under the chassis.
3. Schematic had wrong pin out for right channel/left channel input to tone control board. One pin was skipped on the board, but that change was never made on the schematic which threw every pin off by 1 pin.
4. Aux, Stereo, and IF indicators lamps are burned out and need to be replaced.
A few pics:
1. D16, D17, & Q10 on tuner board defective causing tuner power supply to fail.
2. After much troubleshooting found out why the right channel would not work. In the tone control board there was a cracked solder joint on one side the balance control pot where the input signal entered. This was not visible with the tone control board installed under the chassis.
3. Schematic had wrong pin out for right channel/left channel input to tone control board. One pin was skipped on the board, but that change was never made on the schematic which threw every pin off by 1 pin.
4. Aux, Stereo, and IF indicators lamps are burned out and need to be replaced.
A few pics:
Q10 and associated transistors for voltage regulator on tuner board not yet replaced.
Stereo mode switch, dubbing & monitor A/B & mode switch
Bad solder joint very lower front going to balance pot was cracked.
left/right input to tone control board. Pin 2 skipped but not on schematic
Tone control board--low/mid/high pots and volume and balance pots
Lamps for AUX, Stereo & Narrow IF are burned out. Anybody know where I might be able to get these?
Unit before disassembly. Found unit in garage and I think it was being used as a prop.