Maxon SP200/210 Radio

SP200/210

6.2 Troubleshooting Chart

Symptoms

Causes

 

Remedy

Radio does not work

1.

Battery is discharged

1.

Replace battery

 

 

(below 6V =/-10%)

 

 

 

 

2.

Fuse blown

2.

Replace Fuse

 

3.

5V supply missing

3.

Check IC5 (5V +/-0.2V)

Warning Tone and

1.

PLL error

1.

Check TCXO/VCO/PLL IC

radio does not work

2.

EEPROM failure

 

 

freqs programmed

 

3.

Low battery

2.

Re-program

 

 

 

3.

Replace, or charge, battery

Poor Rx sensitivity

1.

Defective Antenna switch

1.

Check D5 & D6

(-10 to –60dBm)

2.

Defective front-end

2.

Check front end

 

3.

Defective mixer

3.

Check D9, T1 & T2

 

4.

IF IC

4.

Check X1, CF1/CF2 & IC5

 

5.

VCO output level

5.

Check Rx VCO level >+1.2dBm

 

6.

LO frequency

6.

Retune TCXO

Defective Rx

1.

VCO frequency change or drop

 

1.

Repair VCO

 

 

in level

 

 

Defective IF IC (IC1)

 

2.

Defective voltage source

 

2.

Check IC1

PLL Error

1.

Defective 12.8MHz TCXO

 

1.

Replace TCXO

 

2.

Voltage source for Rx VCO / Tx

 

2.

Check Rx VCO / Tx VCO

 

 

VCO

 

3.

Replace IC2. Check DC/DC

 

3.

Defective PLL

 

 

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.

Table 6-2 – Troubleshooting chart

TROUBLESHOOTING

Issue 1.0

Page 6-2

03/01

Page 40
Image 40
Maxon Telecom SP210, SP200 service manual Troubleshooting Chart, If IC