Operating instructions

8.1 PB-16KA REC & REPRO Amplifier P.C.B. Assembly
No. Description Part No. Notes
P.C.B. PB9A577
RV101 Potentiometer RV414172 PB GAIN 10 kΩ
RV102 Potentiometer RV423171 PB H EQ 2 kΩ
RV103 Potentiometer RV453163 PB L EQ 5 kΩ
RV104 Potentiometer RV415175 PB LOW EQ 100 kΩ
RV105 Potentiometer RV414172 SEL/REP GAIN 10 kΩ
RV106 Potentiometer RV423171 SEL/REP H EQ 2 kΩ
RV107 Potentiometer RV453163 SEL/REP L EQ 5 kΩ
RV108 Potentiometer RV415175 SEL/REP LOW EQ 100 kΩ
RV201 Potentiometer RV414172 REC GAIN 10 kΩ
RV202 Potentiometer RV414172 MONI 10kΩ
RV203 Potentiometer RV414172 H EQ 10 kΩ
RV204 Potentiometer RV424173 H PHASE 20 kΩ
RV205 Potentiometer RV414172 L EQ 10 kΩ
RV206 Potentiometer RV424173 L PHASE 20 kΩ
RV207 Potentiometer RV452202 CMMR BAL. 500 Ω
RV301 Potentiometer RV414172 BIAS 10 kΩ
RV401 Potentiometer RV414207 ERASE 10 kΩ
RL503 Relay RY1ZA013 N.R.
RL501 Relay RY4DC037 REC
RL502 Relay RY1ZA013 ERASE
L401,L402
L301~L303 Inductor IN19107 270 µH
L201,L601~L602
L101~L103 Inductor IN19072 3.3 mH
Heatsink KZ1A028 One Transistor
KZ1A042 Two Transistors
C638, C639 Capacitor C71R012M 1 µF/35V Tantalum
SW101 Switch WH31016 BAL.—UNBAL.
T101 Transformer TF21019A SEL/REP
R399, R422 Resistor R8AJ100M 1/2 W 10 Ω
R421 Resistor R8AJ200M 1/2 W 20 Ω
R185, R186,
R187, R188 Resistor R8CJ180M 2 W 18 Ω
TP1 Bias Current
TP2 Erase Current
Section 8 Printed Circuit Board Layouts and Parts Lists
8 - 2
April 1992
MTR-90III Operation and Maintenance Manual