Adjustment Of Idling Current; Adjustment Procedure - Onkyo TX-NR838 Service Manual

ADJUSTMENT PROCEDURE

ADJUSTMENT OF IDLING CURRENT

Applied to the following model.
(Model) TX-NR737/838/ DTR-40.6/50.6
Procedure
a. Pre-adjustment
Set the following registers to minimum position before POWER ON.
Set the voltages at the following terminals to the following voltage by adjusting the following registers, under the condition of
no input and no load, immediately after POWER ON.
Channel
Terminals
Registers
Voltage
b. Aging
Heat run during the following time.
Time
c. Final adjustment
Re-adjust by the following procedure after heat running for the above mentioned time.
L/C/R
Below 9mV
Between
Over 11mV
SL/SR/SBL(SW)/SBR
Below 6mV
Between
Over 8mV
Adjustment point
Equip series 1/4W 100-ohm resisters near the terminal respectively in each pole of the jig used for the above mentioned terminals.
Top
R5446 R5444 R5441
SBR
Test point
P6086 P6084
SBR
Front
L/C/R
2.5mV
9mV
Do not adjust.
11mV
6mV
Do not adjust.
8mV
R5442 R5440
SR R C L
BACLA-1579
P6081 P6082 P6080
SR R C L
BAAF-1517
TX-NR737/838/ DTR-40.6/50.6
SL/SR/SBL/SBR
1.5mV
R5443 R5445
SBL
P6083 P6085
SL SBL
Connection
100ohms,
1/4W
DC Volt meter
AVR