C31
NU
NOTES:
1. UNLESS OTHERWtSE INDICATED. RESISTOR VALUES ARE IN
OHMS. CAPACITOR VALUES ARE IN PICOFARADS, INDUCTOR
VALUES ARE IN MICROHENRIES.
2. NON — POLARIZEO CAPACITORS ARE C H IP -T Y P E UNLESS
OTHERWISE INDICATED.
3. POLARIZEO CAPACITORS ARE CHIP— TANTALUM TYPE UNLESS
OTHERWISE INDICATED.
4. "N U " MEANS COMPONENT IS NOT USEO.
5. DC VOLTAGES ARE MEASURED WITH A HIGH IMPEDANCE
(1 0 MEGOHM) DC VOLTMETER.
6. AC VOLTAGES ARE MEASURED WITH A HIGH IMPEDANCE
AC RMS VOLTMETER,
7. ALL VOLTAGE MEASUREMENTS ARE IN THE RECEIVE MODE
UNLESS INDICATED AS FOLLOWS:
(R ) RECEIVE MODE
( T ) TRANSMIT MODE
S . MEASURED IN THE RECEIVE MODE WITH AN O N — CHANNEL
UNMODULATEO SIGNAL A T A LEVEL O F - 2 0 D8M.
9.
MEASURED IN THE RECEIVE MODE WITH AN O N -C H A N N E L
SIGNAL AT A LEVEL OF - 2 0 DBM, MODULATED WITH 1 KHZ
A T 3 KHZ DEVIATION (FO R 2 0 / 2 5 KHZ MODELS) OR 1.5 KHZ
DEVIATION (FO R 12.5 KHZ MODELS). MEASURED WITH AN AC
RMS VOLTMETER.
10, SAME AS NOTE 8 EXCEPT WITH VOLUME CONTROL ADJUSTED
FOR 5 0 0 MILLIWATTS (2 .8 2 VOLTS RMS ACROSS 1 6 -O H M LOAD
CONNECTED TO THE EXT SPKR JA C K ).
11. MEASURED IN THE TRANSMIT MODE WITH A 1 KHZ. 11 MV
RMS SIGNAL APPUED TO TH E EXTERNAL MICROPHONE INPUT.
CR51
CR 201.CR 202
CR401
CR402.CR403
CR404.CR406
(
п
е
в
m
C R 203.CR 252
CR 101.C R 102
® ------------ 3
CR 253.CR 255
CR405
DS401
E 2 C =
= 3 C 2
1 e =
B 2 t =
= ) В 1
2 C =
C 1 < =
= D E 1
3 c z
U 4 1 0
U 4 1 1
R P D -9 1 1 0 1 -B
Schematic Diagram fo r HLD9675C and HLD9677C
VHF Main Boards, 146-174 MHz
(sheet 1 of2)
