| Power Supply: 13,8 V | Oscilloscope | Frequency Counter | DC Voltmeter |
| PA SW | Off | ||
| RIT | Middle position | ||
| Mode | AM | ||
| Frequency | 28.000 MHz |
| Step | Condition | Adjustment | Procedure |
|---|---|---|---|
| 1 | AM RX | L315 | Connect the Oscilloscope and Frequency Counter to TP306. Adjust for 6.200 MHz +/- 20 Hz |
| 2 | AM RX | L318 | Connect the Oscilloscope and Frequency Counter to TP304. Adjust for 38.6950 MHz +/- 20 Hz. Check: USB : 38.6975MHz LSB : 38.6925MHz |
| 3 | AM RX | L317 | Connect the DC Voltmeter to TP 303. Adjust for 6.5 V +/- 0.1 V |
| 4 | CW RX | L117 | Connect the Oscilloscope and Frequency Counter to TP1. Adjust for 10.695 MHz +/- 20 Hz |
| 5 | LSB RX | L118 | Connect the Oscilloscope and Frequency Counter to TP1. Adjust for 10.6925 MHz -40 Hz to + 0 Hz |
| 6 | USB RX | L116 | Connect the Oscilloscope and Frequency Counter to TP1. Adjust for 10.6975 +/- 20 Hz |
| 7 | USB RX | VR111 | Connect the Oscilloscope and Frequency Counter to TP5. Adjust for 38.6975 +/- 20 Hz |
| Adjustment | Description |
|---|---|
| VR304 | Amplifier Gain Adjustment |
| Only in President HR2600 | |
| Adjustment | Description |
|---|---|
| VR301 | DC Balance Adjustment for Balanced Mixer |
| L303 | 9-10MHz Signal Balance Adjustment to Mixer |
| L304 | 14-18MHz Signal Balance Adjustment to Mixer |
| Connect Oscilloscope to IC304 pin 2. Adjust VR301 for correct DC-balance. Adjust L303 for maximum signal. Adjust L304 for maximum signal. |
| Adjustment | Description |
|---|---|
| VR302 | DC Balance Adjustment for Balanced Mixer |
| L313 | 22MHz Signal Balance Adjustment to Mixer |
| L314 | 36-40MHz Signal Balance Adjustment to Mixer |
| Connect Oscilloscope to IC305 pin 2. Adjust VR302 for correct DC-balance. Adjust L313 for maximum signal. Adjust L314 for maximum signal. |
| Adjustment | Description |
|---|---|
| L310 | High Band Adjustment |
| L319 | Low Band Adjustment |
| Connect Oscilloscope to Output Terminal for VCO. Adjust L310 for maximum at 29.000MHz. Adjust L319 for maximum at 28.500MHz. |
| Band | Frequency Range (Without ChipSwitch or Frequency Modification) |
|---|---|
| A | 28.000 to 28.4999 MHz |
| B | 28.500 to 28.999 MHz |
| C | 29.000 to 29.4999 MHz |
| D | 29.5000 to 29.699 MHz |
| Power Supply: 13,8 V | Dummy Load 8 ohm | AF VTVM | Oscilloscope |
| HF SSG: | 28.000 MHz | 1 kHz | 30% Mod. |
| NB SW | Off | ||
| PA SW | Off | ||
| Beep SW | Off | ||
| VOLUME | Max. | ||
| RIT | Middle position | ||
| Mode | AM | ||
| Squelch | Min. | ||
| DX/LOC | DX | ||
| Frequency | 28.000 MHz |
| Step | Condition | Adjustment | Procedure |
|---|---|---|---|
| 1 | AM SSG 40dB 1 kHz Mod. | L101 L104 L113 L115 L105 | Alignment of sensitivity. Adjust coils for maximum reading on the AF VTVM. |
| 2 | AM SSG 66dB 1 kHz Mod. | VR102 | Alignment of Squelch. Set Squelsch to maximum. Adjust VR102 so that the squelch just breaks. |
| 3 | AM SSG 46dB No Mod. | VR101 | Alignment of S-meter. Adjust VR101 so that "9" LCD just lights on. |
| 4 | FM SSG 1 mV 1.5 kHz Dev. | L401 | Adjust L401 for maximum reading on the AF VTVM. |
| 5 | AM SSG 1 mV Noise Gen. | L203 | Adjust L203 for maximum reading on the AF VTVM. Noise Generator output: 50 Hz SQ wave 2 V P-P. |
| Power Supply: 13,8 V | AF SSG | RF VTVM | DC AM-meter |
| AF VTVM | FM Linear Detector | Oscilloscope | RF Power Meter |
| Dummy Load, 50 ohm |
| VR112 | Clockwise | ||
| VR113 | Counter Clockwise | ||
| VR103 | Clockwise | ||
| SWR/CAL | Clockwise | ||
| RF Gain | Middle position | ||
| PA SW | Off | ||
| INDIC SW | RF | ||
| Mic Gain Sw | Off | ||
| RF Power | Max. | ||
| Frequency | 28.000 MHz |
| Step | Condition | Adjustment | Procedure |
|---|---|---|---|
| 1 | USB No Mod. | VR112 | Remove the B002 (PB-100) from Main PCB. Connect a DC AM Meter to TP4 (+) and TP3 (-). Adjust VR112 for 50 mA reading on the DC AM Meter. |
| 2 | USB No Mod. | VR113 | Remove the B002 (PB-100) from Main PCB. Connect the DC AM Meter to TP4 (+) and TP2 (-). Adjust VR113 for 50 mA reading on the DC AM Meter |
| 3 | USB 1 mV Mod. | L111 | Connect a RF Power Meter to Ant.jack. Connect a RF VTVM, an Oscilloscope and an RF Linear Dectector across an Dummy Load to the RF Power meter. Adjust L111 for maximum reading en the RF VTVM. During this step, set the AF Oscillator so that the output is less than 20 V. Repeat this step two times. |
| 4 | USB 30 mV Mod. | VR104 | Adjust VR104 for 32.5 V reading on the RF VTVM. |
| 5 | USB 30 mV Mod. | VR106 | Adjust VR106 so that the carrier leakage at USB and LSB become minimum and almost equal. |
| 6 | CW No Mod. | VR103 | Connect a SW between Pin 8 and 9 of ACC connector. When turn on the SW, adjust VR103 for 21 Watt reading on the RF Power Meter. |
| 7 | AM No Mod. | VR107 | Adjust VR107 for 10 Watt reading on the RF Power Meter |
| 8 | AM No Mod. | VR117 | Adjust VR107 so that "9" LCD just light on. |
| 9 | AM 1 kHz 30 mV Mod. | VR114 | Adjust VR114 to obtain the 85% negative reading on the Oscilloscope. |
| 10 | AM 1 kHz 1 mV Mod. | VR115 | INDIC: MOD. Adjust VR115 so that "9" LCD just light on. |
| 11 | FM 1 kHz 30 mV Mod. | VR105 | Adjust VR105 for +/- 3 kHz deviation on the FM Linear Detector. |
| 12 | CW No Mod. Vol.: Max. | VR116 | Connect an AF VTVM across a Dummy Load (8 ohm) between Pin 1 and Pin 2 of ACC connector. When turn on the SW, adjust VR116 for 0.4 V reading on the AF VTVM. |
This counter shows the number of hits since the 7th November 1999
Copyright © RadioMods 1997-2016