Idle Current Adjustment - Pioneer VSX-1020-K Service Manual

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8.2 IDLE CURRENT ADJUSTMENT

1. Idle Current Adjustment
Measurement Points
TP1201FL 3PIN : TEST POINT(+)
TP1201FL 1PIN : TEST POINT(–)
TP1201FR 3PIN : TEST POINT(+)
TP1201FR 1PIN : TEST POINT(–)
TP1201C 3PIN : TEST POINT(+)
TP1201C 1PIN : TEST POINT(–)
TP1201SL 3PIN : TEST POINT(+)
TP1201SL 1PIN : TEST POINT(–)
TP1201SR 3PIN : TEST POINT(+)
TP1201SR 1PIN : TEST POINT(–)
TP1201SBL 3PIN : TEST POINT(+)
TP1201SBL 1PIN : TEST POINT(–)
TP1201SBR 3PIN : TEST POINT(+)
TP1201SBR 1PIN : TEST POINT(–)
• Adjustment Point and Measurement Points.... see fig1.
B
AMP ASSY
Idle current Idle current
VR: V1201FL VR: V1201SL
TP1201FL 1 PIN TP1201SL 1 PIN
TEST POINT (–) TEST POINT (–)
TP1201FL 3 PIN
TEST POINT (+)
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6
Adjustment
Points
V1201FL
V1201FL
V1201C
V1201SL
V1201SR
V1201SBL
V1201SBR
TP1201SR 3 PIN
TEST POINT (+)
Idle current Idle current
VR: V1201C VR: V1201SR
TP1201C 3 PIN
TEST POINT (+)
TP1201SL 3 PIN TP1201C 1 PIN
TEST POINT (+) TEST POINT (–)
[Fig. 1]
VSX-1020-K
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7
Procedure
1 Turn on the power.
2 Perform aging for one minute.
3 Connect a digital voltmeter to the measurement point.
4 Turn the adjustment VR so that the voltage becomes
in 2.0 mV ± 0.2 mV.
(Condition : No signal and no load)
TP1201SR 1 PIN
TEST POINT (–)
Idle current Idle current
VR: V1201FR VR: V1201SBL
TP1201FR 3 PIN TP1201SBL 3 PIN
TEST POINT (+) TEST POINT (+)
TP1201FR 1 PIN TP1201SBL 1 PIN
TEST POINT (–) TEST POINT (–)
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8
A
B
C
SIDE A
D
Idle current
VR: V1201SBR
E
TP1201SBR 3 PIN
TEST POINT (+)
TP1201SBR 1 PIN
TEST POINT (–)
F
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