JVC RX-D201 - Troubleshooting Disconnected Components

Troubleshooting With Disconnected Q1101/1102 (1/2)
Without ‘AMP_+/-B’, we could check IC101 and the DC-DC Converter Control circuit easily and safely
Check the IC101 circuit
1
6
5
4
2
3
7
8
-B
-B_+12V
DCDC +12V
200 / 210 KHZ
4.2 - 5V P-P
200 / 210 KHZ
11V. P-P
200 / 210 KHZ
12V. P-P
-B_+12v
-B
+11.3v
+0.8v
Since Q1101 is disconnected there is, no floating voltage at pin 4
of IC101. The power supply for the high channel drive is not
floated.
IN AT PIN 5
IN AT PIN 6
OUT AT PIN 3
OUT AT PIN 8