Adjustment; Idoling Current Adjustment; Measurement And Adjustment; Specification For Verification After Adjustment - JVC KS-AX5700 Service Manual

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4.1

IDOLING CURRENT ADJUSTMENT

Instrument requited
DC power
Multimeter
Connection
Connect the DC power to the body (+B, remote and GND). After three minutes or more, start measurement
(wait until the voltage is stabilized).

Measurement and adjustment

L ch; measure the voltage at six point TP105 ~ TP110 and adjust the point highest in voltage to 2.0 mV (VR101).
Measure the voltage at the six points again and confirm it meets the specification.
R ch; measure the voltage at six point TP205 ~ TP210 and adjust the point highest in voltage to 2.0 mV (VR201).
TE
L 13942296513
Measure the voltage at the six points again and confirm it meets the specification.

Specification for verification after adjustment

MIN MAX
0.2 [mV] 2.5 [mV]
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1-6 (No.MA195)
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SECTION 4

ADJUSTMENT

Remote GND +B
GND DC power +B
EXAMPLE
TP105,107,109,205,207,209 : " + " VALUE
TP106,108,110,206,208,210 : " - " VALUE
FIRST
TP
MEASURE
[mV]
105 or 205 1.5
106 or 206 2.2
107 or 207 1.9
108 or 208 2.9
109 or 209 3.8
110 or 210 2.0
Adjust the point highest in voltage to
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2.0 [mV] (VR101 or VR201).
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2 9
8
Short-circuit the remote terminal and +B terminal
and connect to the power supply.
Use the thick cord for connection.
Q Q
3 6 7 1 3 1 5
2.0
co
.
After adjustment, measure the voltage
to meet the specification(0.2 ~ 2.5 [mV]).
9 4 2 8
0 5 8 2 9 9 4 2 8
SECOND
MEASURE
[mV]
0.9
1.6
1.2
2.3
2.0
1.5
m
9 9
9 9