Power Supply Circuits - Icom IC-F7000 Service Manual Addendum

4-5 POWER SUPPLY CIRCUITS

4-5-1 PA UNIT VOLTAGE LINE
LINE
HV13 The voltage from an external power supply.
The same voltage as the HV13 line passed
HV
through the fuse (F6701).
The same voltage as the HV13 line passes
S13V
through the switching relay (RL6701).
The same voltage as the HV13 line passes
13.8
through the switching relay (RL6701).
8 V for transmitter circuits regulated by the +8
PA8V
regulator circuit (IC6601).
8 V for transmitter circuits regulated by the T8
T8V
regulator circuit (Q6601, Q6602).
4-5-2 DISPLAY BOARD (RC-26) VOLTAGE LINE
LINE
The voltage from PA and MAIN units via the
H13V
J8201.
Common 10 V converted from the 13 V line and
10V
regulated by the +10 regulator circuit (IC8301).
Common 5 V converted from the 5 V line and
5V
regulated by the +5 regulator circuit (IC8290).
Common 8 V converted from the 8 V line and
8V
regulated by the +8 regulator circuit (IC8310).
4-5-3 PLL UNIT VOLTAGE LINE
LINE
The voltage from MAIN units via the J5001, pin
HV13
1.
Common 5 V line from the MAIN unit via the
H5V
J7331, pin 21.
Common 5 V converted from the 13 V line and
5V
regulated by the +5 regulator circuit (IC5001).
Common 8 V converted from the 13 V line and
8VL
regulated by the +8 regulator circuit (IC5031).
DESCRIPTION
DESCRIPTION
DESCRIPTION
4-5-4 MAIN UNIT VOLTAGE LINE
LINE
S13V The voltage from the PA unit via the J1901.
Receive 13 V converted from the S13V line and
R13V
regulated by the R13 regulator circuit (Q1505).
Common 8 V converted from the S13V line and
8V
regulated by the +8 regulator circuit (IC1502).
Common –5 V converted from the S13V line
–5V and regulated by the –5 V DC-DC converter
(IC1551, D1551, D1552)
Transmit 8 V converted from the S13V line and
T8
regulated by the T8 regulator circuit (Q1501).
Receive 8 V converted from the S13V line and
R8
regulated by the R8 regulator circuit (Q1502).
Common 5 V converted from the S13V line and
5V
regulated by the +5 regulator circuit (IC1501).
Common 5 V converted from the HV13 line and
H5V
regulated by the +5 regulator circuit (IC3101).
Common 5 V converted from the HV13 line and
HV
regulated by the +5 regulator circuit (IC3101).
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DESCRIPTION