5 - 3
5-3 RECEIVER ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITIONS
MEASUREMENT
VALUE
ADJUSTMENT
POINT
UNIT
LOCATION
UNIT
ADJUST
PIN ATT
1
• Frequency
: 14.10000 MHz
• Mode
: USB
• Receiving
RF-C
Connect a digital
multimeter to CP1.
1.7 V
RF-C
R63
HF
SENSITIVITY
1
• Frequency
: 14.09850 MHz
• Mode
: USB
• [10dB]
: ON
• [AGC]
: Fast
• Connect an SSG to the antenna connector
for 0.1–30 MHz (50
Ω
ANT) and set as;
Frequency
: 14.10000 MHz
Level*
: 0.56 µV (–112 dBm)
Modulation
:
OFF
• Receiving
Rear
panel
C o n n e c t a n A C
voltmeter to the [EXT
SP] with an 8
Ω
load.
Maximum output
level
Adjust in
sequence
L65, L66,
L63, L62
repeatedly
2
• Set the SSG as;
Level
:
OFF
• Receiving
Minimum output
level
R77
1ST MIXER
BIAS
VOLTAGE
1
• Frequency
: 173.00000 MHz
• Disconnect J4.
• Receiving
RF-D
Connect a digital
multimeter to both
sides of R91.
0.2 V
RF-D
R109
HPF SHIFT
VOLTAGE
1
• Frequency
: 1300.00000 MHz
• Mode
: FM
• Receiving
CONV-B
Connect a digital
multimeter to CP2.
14.5 V
CONV-B
R55
2
• Frequency
: 1100.00000 MHz
• Receiving
2.0–4.0 V
Verify
NOTE:
Before adjusting WFM SENSITIVITY, 5-4 RF-C BPF TUNED VOLTAGE must be adjusted.
SENSITIVITY
(WFM)
1
• Frequency
: 173.02000 MHz
• Mode
: WFM
• Connect an SSG to the antenna connector
for 30–2000 MHz and set as;
Frequency
: 173.02000 MHz
Level*
: 3.2 µV (–97 dBm)
Modulation
: 1 kHz
Deviation
: ±75 kHz
• Receiving
MAIN-A
Connect a digital
multimeter to CP4.
Minimum
level
(Note the voltage
as the reference)
MAIN-A
Adjust in
sequence
L7, L8, L9,
L10
repeatedly
(FM)
2
• Frequency
: 173.02000 MHz
• Mode
: FM
• Connect an SSG to the antenna connector
for 30–2000 MHz and set as;
Frequency
: 173.02000 MHz
Level*
: 3.2 µV (–97 dBm)
Modulation
: 1 kHz
Deviation
: ±5 kHz
• Receiving
Front
panel
S-meter
Maximum
level
MAIN-A
Adjust in
sequence
L14, L17,
L22, L25,
L26
repeatedly
3
• Set the SSG as;
Level*
:
32 µV (–77 dBm)
Modulation :
None
MAIN-A
Connect a digital
multimeter to CP5.
The same voltage
on " SENSITIVITY
(WFM)."
MAIN-A
R60
4
• Set the SSG as;
Level
:
OFF
Front
panel
The center
indicator
disappears.
1ST IF
NOTCH
1
• Frequency
: 788.60000 MHz
• Mode
: FM
• Connect an SSG to the antenna connector
for 30–2000 MHz and set as;
Frequency
: 810.00000 MHz
Level*
: 32 mV (–17 dBm)
Modulation
: 1 kHz
Deviation
: ±75 kHz
• Receiving
Front
panel
S-meter
Maximum
level
MIX-A
L15
*; This output level of the SSG is indicated as SSG's terminated circuit.
RECV
AFC
Center indicator
(Replacement page)
Apr. 2010
Содержание iC- r8500
Страница 1: ...SERVICE MANUAL ADDENDUM CONTENTS REPLACEMENT PAGE 5 3 PARTS LIST 1 VOLTAGE DIAGRAM 21 Jun 2011...
Страница 24: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 21 VOLTAGE DIAGRAM 23 Apr 2011...
Страница 50: ...SERVICE MANUAL ADDENDUM CONTENTS REPLACEMENT PAGES 5 5 5 6 PARTS LIST 1 VOLTAGE DIAGRAM 21 Jan 2011...
Страница 52: ...Replacement page Jan 2011 5 6 MAIN A UNIT CP2 Noise blanker check point...
Страница 79: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 21 VOLTAGE DIAGRAM 23 Sep 2010...
Страница 147: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 20 VOLTAGE DIAGRAM 22 Feb 2009...
Страница 177: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 20 VOLTAGE DIAGRAM 28 Jul 2008...
Страница 213: ...S 14318XZ C1 Nov 2006 COMMUNICATIONS RECEIVER...
Страница 220: ...4 1 SECTION 4 CIRCUIT DESCRIPTION UNIT NAME MAIN MAIN A RF A RF C RF B RF D MIX MIX A CONV CONV B PLL PLL B...
Страница 221: ...4 2 UNIT NAME MAIN MAIN A RF A RF C RF B RF D MIX MIX A CONV CONV B PLL PLL B...
Страница 222: ...4 3 UNIT NAME MAIN MAIN A RF A RF C RF B RF D MIX MIX A CONV CONV B PLL PLL B...
Страница 223: ...4 4 UNIT NAME MAIN MAIN A RF A RF C RF B RF D MIX MIX A CONV CONV B PLL PLL B...
Страница 224: ...4 5 UNIT NAME MAIN MAIN A RF A RF C RF B RF D MIX MIX A CONV CONV B PLL PLL B...
Страница 225: ...4 6 UNIT NAME MAIN MAIN A RF A RF C RF B RF D MIX MIX A CONV CONV B PLL PLL B...
Страница 226: ...4 7 UNIT NAME MAIN MAIN A RF A RF C RF B RF D MIX MIX A CONV CONV B PLL PLL B...
Страница 227: ...4 8 UNIT NAME MAIN MAIN A RF A RF C RF B RF D MIX MIX A CONV CONV B PLL PLL B...
Страница 228: ...4 9 UNIT NAME MAIN MAIN A RF A RF C RF B RF D MIX MIX A CONV CONV B PLL PLL B...
Страница 229: ...4 10 UNIT NAME MAIN MAIN A RF A RF C RF B RF D MIX MIX A CONV CONV B PLL PLL B...
Страница 230: ...5 1 SECTION 5 ADJUSTMENT PROCEDURE MAIN A PLL B PLL B MAIN A...
Страница 231: ...5 2 PLL B MAIN A...
Страница 233: ...5 4 MAIN A MIX A AND RF C UNITS CONBV B AND RF C UNITS...
Страница 234: ...5 5 MAIN A MAIN A MAIN A MAIN A MAIN A MAIN A MAIN A...
Страница 235: ...5 6 MAIN A UNIT...
Страница 236: ...5 7 RF C BPF TUNED VOLTAGE ADJUSTMENT RF C BPF...
Страница 237: ...5 8 RF C BPF TUNED VOLTAGE ADJUSTMENT continued RF C BPF...
Страница 238: ...5 9 RF C BPF...
Страница 239: ...5 10...
Страница 261: ...7 2...
Страница 262: ...7 3...
Страница 265: ...SECTION 8 SEMICONDUCTOR INFRMATION 8 1...
Страница 266: ...8 2...
Страница 286: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 14318XZ C1 2006 Icom Inc...