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IC-228A EXPANDED RF | Radioaficion Ham Radio

IC-228A EXPANDED RF

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ICOM IC-228A

EXPANDED RF

1. Remove power and antenna.

2. Remove screws open case.

3. Remove diode D19 (for all Serial Numbers)

4. Replace chip diode D7 with an 1SS184) { 228A Below ser# 02900 & 228H below ser# 06300)

4. Remove chip diode D9 (228A above ser# 02900 & 228H above ser# 06300)

5. Solder bridge Pads A & B (228A above ser# 02900 & 228H above ser# 06300)

6. Reassemble the radio

7. Reset the microprocessor (Push and hold [SQUELCH/Monitor] & [LOCK] and turn power on)

Note : Discriminator output on pin 9 of IC 1 (MC3357P)

ICOM IC-228A EXPANDED RF

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