PRESIDENT Jack Manuale utente

р в е я ю т с

JACK

SERVICE MANUAL

ALIGNMENT OF PLL & CARRIER OSCILLATOR PORTION

1. Test Equipment Required

) . RF VTVM

b ) . DC Power Supply (13.8V)

c ) . Frequency Counter (0 - 50MHz)

d ) . 50 ohm Lo d.

2. Alignment Procedure

STEP PRESET ТО ÂDJUSTMENI REMARKS

1Ch nnel: 40

Mode: AM, RX.

Cl ri: Center

Tone : Low

PA/СВ: CB

L16 Connect RF VTVM to TP4 ( le d of R112).

Adjust L16 for the m ximum indic tion on

oscilloscope.

2S me s bove

EXE PT L17 Connect DC Voltmeter to TP2 (le d of R117).

Adjust L17 to obt in 5.5V re ding nd

confirm beyound 2V in Low B nd, ch nnel 1.

3S me s Step 1 L18 Connect RF VTVM to TP3 (le d of R81).

Adjust L18 for the m ximum re ding.

4S me s Step 1 L20 Connect Frequency counter to TP3 (le d of

R81). Adjust L20 to obt in 16.7100MHz

re ding.

5Mode: USB, RX. L21 Adjust L21 to obt in 16.7125MHz re ding.

6Mode: LSB, RX. L22 Adjust L22 to obt in 16.7075MHz re ding.

7Mode: LSB, TX. VR6 Adjust VR6 to obt in 16.7075MHz re ding.

8Mode: LSB, RX. L25 Connect Frequency counter to TP5 (le d of

R53). Adjust L25 to obt in 10.6975MHz

re ding.

9Mode: USB, RX. L24 Adjust L24 to obt in 10.6925MHz re ding.

10 Mode: AM, TX. L23 Connect Frequency counter to TP9(le d of

R84). Adjust L23 to obt in 10.6950MHz

re d ing.

Form; AJT501-T-I JACK

3. Test Equipment Connection

Form; AJT501—T—2 JACK

Alignment Test Point

ALIGNMENT OF TRANSMITTER PORTION

1. Test Equipment Required

) . AF Sign l Gener tor (1) for 500Hz nd 1,000Hz

b ) . AF Sign l Gener tor (2) for 2,400Hz

c ) . AF VTVM ( 150mV fu ll sc le) d). RF VTVM (50V.full sc le)

e). RF Powermeter (10W M x. Thruline type) f ) . 50 ohm Dummy Lo d

g). Oscilloscope h). H rmonie Meter

i) . DC Voltmeter j). DG Ammeter (150mA fu ll sc le)

2. Alignment Procedure

STEP PRESET TO ADJUSTMENT REMARKS

1 Ch nnel: 19

Mode: USB, TX.

No Modul tion

VR10 Connect DC Ammeter to TP8(+), TP7(-).

Disconnect the PC-834AA. Adjust VR10 to

obt in the current pprox.8mA.

2S me s Step 1 VR9 Connect DC Ammeter to TP8(+), TP6(-).

Adjust VR9 to obt in the current pprox.

100mA.

3 Ch nnel : 19

Mode: USB, TX.

AF SG: 30mV,

Two Tone

500 nd 2400Hz

L43 nd L44 Disconnect the DC Ammeter. Connect PC-834.

Connect Powermeter, RF VTVM & Oscilloscope.

Set VR7 CW M x. Adjust the pe k indic 

tion of coils to 19CH.

4S me s bove

exept

Ch nnel: 19

L42 Turn the co r of L41 to be fi t with upper

side of the c o il's cover. Adjust L42 for

the m ximum indic tion.

5S me s bove

exept

Ch nnel: 19

L41 Adjust L41 for the m ximum indic tion.

While then, keep output volt ge under 20V

by djusting SG.

6S me s bove

Ch nnel : 1

L41 Adjust L41 to obt in the minimum d iffé r

ence on the RF power meter between

Ch nnel 40 nd Ch nnel 1.

7Ch nnel: 19

Mode: AM, TX.

90% modul tion

L30 Adjust L30 to obt in the m ximum indic 

tion on the RF VTVM.

8 s me s step 3 VR7 Adjust VR7 to obt in RF output of 24.5V on

the RF VTVM.

9S me s Step 1 VR4 Adjust VR4 to obt in the minimum c rrier

le k ge.

Form; AJT501-T-3 JACK

STEP PRESET TO ADJUSTMENT REMARKS

10 S me s Step 1

except LSB VR4 S me s bove

11 Repe t Steps 9 nd 10 to obt in pproxim tely the s me mount of minimum

c rrier le kege on USB nd LSB modes.

12 Ch nnel : 19

Mode: AM, TX.

No Modul tion

VR11 Adjust VR11 to obt in RF c rrier power of

5.0W on RF Power meter.

13 S me s bove VR8 Adjust VR8 to obt in n indic tion of

m rked position on bu ilt-in meter.

14 S me s bove

exept

AF SG: 30mV

lKHz Mod.

VR5 Adjust VR5 to obt in 90% (neg tive)

modul tion.

15 S me s bove

except

Mode: FM

VR3 Connect Devi tion meter. AF SSG supplies

lKHz, 30mV. Adjust VR3 to obt in 4.5KHz

Devi tion on Devi tion meter.

3. Test Equipment Connection

FM LINEAR DETECTOR

Form; AJT501-T-4 JACK

Alignment Test Point

ALIGNMENT OF RECEIVER PORTION

1. Test Equipment Required

) . RF SSG

b ) . DC Voltmeter

c ) . AF VTVM

d ) . Oscilloscope

2. Alignment Procedure

Connect the AF VTVM nd 8 ohm dummy lo d to EXT SP J ck during the

lignment of receiver portion.

STEP PRESET TO ADJUSTMENT REMARKS

1Ch nnel: 19

NB/ANL: OFF

SQL: OFF

RF GAIN: M x

AF VOL: M x

MODE: AM

CB/РА: CB

Set RF SG to 27.185MHz with 30%, 1kHz

modul tion.

2S me s bove L7 Turn the core of L7 to CW. m ximum t the

bottom.

3S me s bove L6, 8, 10, 11

12, 13, 14. Adjust coils to obt in the m ximum AF

output power. While then, keep output

under 500mW by djusting RF SG.

4S me s bov e L7 Adjust L7 to obt in the m ximum AF output

power.

5Ch nnel: 18

Mode: AM

AB/ANL: ON

B nd: mid.

LI nd L2 Connect oscilloscope to TPl. Set RF SSG to

18ch with no modul tion. (SG ATT.: 20dB)

Adjust LI nd L2 to obt in the m ximum DC

volt ge.

6Ch nnel : 19

Mode: AM

SQL: MAX

VR2 Set SSG 19ch, lKHz, 30% Mod. Adjust

VR2 to turn o ff the squelch circu it when

SSG output comes up to lOOOuV.

7S me s bove VR1 Set the SSG to lOOuV output with

no-modul tion. Adjust VR1 to obt in "S-9"

on tr nsceiv er's meter.

Form; AJT501-T-5 JACK

STEP PRESET TO ADJUSTMENT REMARKS

8CH: 19

Mode: FM L3 nd L4 Set the SSG to 5uV, N0 Modul tion.

Connect Oscilloscope to TP10(le d of R279).

Adjust Coils to obt in the m ximum

indic tion on Oscilloscope.

9 S me s bove L5 Set the SSG to FM lKHz, 1.5KHz Devi tion

lmV. Adjust L5 to obt in the m ximum

indic tion on Oscilloscope.

3. Test Equipment Connection

SIGNAL GENERATOR TRANSCEIVER AF V TV M OSCILLOSCOPE

8 О

RESISTOR

Form; AJT501-T-6 JACK

AIignment Test Point

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