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KX-T4330
(Flow Solder Side View)
Test Ground for
Adjustments Item (F),
(G)
Test Mode
Swi
Test Mode
swe
Test Ground for
Adjustments Item (D), (E), (F), (G)
1
KX-74330
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ADJUSTMENTS (KX-T4330R)
If your unit have below symptom, adjust for each Item following table of adjustment.
Adjust the adjustment item (A)
Adjust the adjustment item (B)
Adjust the adjustment item (C)
Adjust the adjustment item (D)
Adjust the adjustment item (E)
Adjust the adjustment item (F)
Adjust the adjustment items (G), (H)
Symptom
The movement of Battery Low Indicator Is wrong.
The base unlit does not receive a call from portable handset.
The base unit does not transmit, and the transmit frequency Is
slipped.
The transmit frequency Is slipped.
The transmit output Is low, and the arrlval distance Is shorted
between base unlt and portable handset.
The reception sensitivity of base unit Is wrong, the nolse Is occurred.
Does not link between base unit and portable handset.
Unit Condition:
. Remove the antenna lead wire from P.C. Board of portable handset.
. Power Supply: DC 3.9 V
. Power/Ringer switch: ON
. Volume Selector: NORMAL
. Speaker Loard: 130Q
How to set the test mode.
1. CH10 Test Mode
.
arwnhd
—
2. CH5 Test Mode
3. How to change CH from Test Mode.
SW1, 2, 12,
SW1, 2, 12,
Press the channel button.
Talk switch OFF
Talk switch OFF
CH1—>CH2-...CH10
SW1 ON
SW2 ON
SW12
ON (Stand-By)
SW12 ON (Stand-By)
Talk switch ON (Talk)
Talk switch ON (Talk)
When replacing these parts, adjust as shown below table.
VRi01
(A) Battery Low
Adjustment
VRi01
IC1, TC1, X1,
| (B) TX VCO Voltage
T8
Test Mode
. Connect the oscilloscope to W-Ground.
2. Set the power supply voltage to DC 3.57 V,
and adjust VR101 so that the reading of
oscilloscope is 1 V+0.3 V.
CH10 Talk
CH10
Talk
1. Connect the digital voltmeter to Y -Ground.
2. Adjust T8 so that the reading of digital
voltmeter is 2.0 V+0.2 V.
D1, T8
Adjustment
IC1, TC1, X1,
T6
1. Connect the digital voltmeter to YW -Ground.
2. Adjust T6 so that the reading of digital
voltmeter is 2.1 V+0.2 V.
CH10 Talk
(C) RX VCO Voltage
Adjustment
TC1, X1, 101
(D) TX Frequency
Adjustment
—
CH10 Talk
_
. Connect the frequency counter to YW -Ground.
2. Adjust TC1 so that the reading of frequency
counter is 49.970 MHz+100 Hz.
. Connect the RF VTVM to YW -Ground.
2. Adjust T9 and T11 for 200 mV~450 mV output
on RF VTIVM.
CH10
Talk
_
Adjustment
|
wo
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