Справочник Пользователя для Maxon Telecom SP200

Maxon SP200/210 Radio SP200/210

TROUBLESHOOTING

Issue 1.0

Page 6-2

03/01

Symptoms

Causes

Remedy

Radio does not work

1.  Battery is discharged

(below 6V =/-10%)

2. Fuse 

blown

3.  5V supply missing

1. Replace 

battery

2. Replace 

Fuse

3.  Check IC5 (5V +/-0.2V)

Warning Tone and
radio does not work

1. PLL 

error

2. EEPROM 

failure

3. Low 

battery

1. Check 

TCXO/VCO/PLL 

IC

freqs programmed

2. Re-program
3.  Replace, or charge, battery

Poor Rx sensitivity
(-10 to –60dBm)

1.  Defective Antenna switch
2. Defective 

front-end

3. Defective 

mixer

4. IF 

IC

5.  VCO output level
6. LO 

frequency

1.  Check D5 & D6
2.  Check front end
3.  Check D9, T1 & T2
4.  Check X1, CF1/CF2 & IC5
5.  Check Rx VCO level >+1.2dBm
6. Retune 

TCXO

Defective Rx

1.  VCO frequency change or drop

in level

2.  Defective voltage source

1. Repair 

VCO

Defective IF IC (IC1)

2. Check 

IC1

PLL Error

1.  Defective 12.8MHz TCXO
2.  Voltage source for Rx VCO / Tx

VCO

3. Defective 

PLL

1. Replace 

TCXO

2.  Check Rx VCO / Tx VCO
3.  Replace IC2.  Check DC/DC

converter

Low / No Tx power

1.  Tx Amp

1.  Check Q9, IC9 & power control

loop

No 

modulation

1. Audio 

ASIC

1. Check 

IC406

No programming

1.  Defective programming lead
2.  Check accessories connector.