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R7000.1
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1991-03-10
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R7000.1
2nd SOLUTION: The ECO
ICOM Amrica, INc
2380-116th Ave, N.E.
Bellevue, Washington 98004
206-454-7619
SERVICE BULLETIN
UNIT MODEL R7000
SB# 9288-004
EFFECTIVE DATE 4/1/88
SERIAL # AFFECTED: ALL
PRODUCT GROUP: Amateur
BACKGROUND INFORMATION:
Display failure do to weak components
TECHNICAL INFORMATION:
Improvement in DC to DC converter and display power supply.
PARTS AFFECTED BOARD TYPE CHANGE TO NEW PART NUMBER
Q1/Q2 2SC 1214 DC to DC Board 2SC 2655 906-00385
R1/R2 3.3 KOHM DC to DC Board 5.16 K 9dP%3
C3/C4 PF DC to DC Board 0.001 MF 50V 918-01500
ceramic cap
Q11/Q12 Display Board 2SC2655 906-00385
R31/R32 3.3KOHM Display 5.16k Ohm 915-01173
C13/C16 Display 0.001 MF 918-01500
DETAIL PROCEDURE:
1. Remove top and bottom cover.
2. Remove front panel sub-assembly from main chassis of radio
3. Remove the DC to DC board and replace components as lCROSSTALK - XVI isted
4. Reinstall DC to DCboard.
5. Replace front panel sub-assembly onto main chassis of radio
6. Replace top and bottom covers.
ESTIMATE TIME TO COMPLETE IS 1 hour
Page 2 of the ECO has a new schematic but no information