Amp Adjustment - Yamaha RX-V396 Service Manual

RX-V396/RX-V396RDS/HTR-5230/HTR-5230RDS
I AMP ADJUSTMENT
Confirmation of Idling Current of Main Amplifier
•
Right after power is turned on, confirm that the voltage across the
terminals of R239(Main Lch),R245(Main Rch), R262(Center),
R252(Rear Lch), R258(Rear Rch) are between 0.1mV and 5.0mV.
•
If it exceeds 5.0mV, open (cut off) R213 (Main Lch), R218 (Main
Rch), R233 (Center), R223 (Rear Lch), R228 (Rear Rch) and
reconfirm the voltage.
•
Confirm that the voltage is 0.25mV ~ 15.0mV after 60 minutes.
MAIN (1)
R218
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R233
R262
R228
R258
R223
R252
R245
OPE (5)
R239
R213
Front Panel
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Q214
R239(Lch)
R245(Rch)
R262(Cch)
R252(RLch)
R258(RRch)
Q211
R213(Lch)
R218(Rch)
R233(Cch)
R223(RLch)
R228(RRch)
Q208
Note)
• If R213, R218, R233, R223 and R228
have already been cut off and idling
current does not flow, reconnect R213,
Q205
R218,R233,R223 and R228.
• Q202,Q205,Q208,Q211 and Q214 are
transistors for temperature correction.
Apply silicone grease to contact sur-
face with the heat sink.
Q202
0.1mV ~ 5.0mV
(DC)
Cut off