88
VSX-39TX, VSX-37TX, VSX-36TX, VSX-D909S
6.1 IDLE CURRENT ADJUSTMENT
6. ADJUSTMENT
• CAUTION
: Heatsink's DC level is equal to +B or -B.
Don't touch them or you will be electricary shocked.
1. Decrease the level of the Adjustment Variable resistors (VR) for the channel to be adjusted. ( Turn counterclockwise.)
2. Set the power switch to ON.
3. Connect the DC voltmeter as shown below and adjust VRs in step No. order so that voltages become 16mV .
4. Ages for seven minutes.
5. Readjust in step No. order so that the voltages become 11.5mV
±
1mV (10.5 to 12.5mV). Adjustment is completed.
+4mV
–0mV
Step
No.
1
VR2601
SL ch
2
VR2501
FL ch
3
VR2541
C ch
4
VR2521
FR ch
5
VR2621
SR ch
Adjustment VR
Adjustment ch
DC Voltmeter
Front side
Heat Sink +B
1
2
3
4
5
Heat Sink –B
VR2621
VR2521
VR2541
VR2501
VR2601
OUTPUT-SR ASSY
OUTPUT-FR ASSY
VL-TERMINAL ASSY
OUTPUT-C ASSY
OUTPUT-FL ASSY
OUTPUT-SL ASSY