Circuit Description; If Unit - Kenwood PW-A series Service Manual

PW-A
the voltage for a FAN drive is exceeded, the signal
which turns off MAINOUTPUT will be outputted with the
comparator of IC 106 1/2.
10. Rectification, flat and smooth circuit -- The voltage
for a FAN drive is rectified and carried out flat and
smooth. The voltage after flat and smooth is about DC-
17V.
11. Transistor -- It is the transistor which regulate the
voltage for a FAN drive.
of 12 controls it.
12. Error amplification circuit -- Volt age of the power
supply for a FAN drive is attenuated by R108, 107 and
TH101. It is compared with the voltage value decided
by R109 and R110.
Consumption current is about 200 to 250mA.
X68-2210(2300)-xx
The unit which attaches the output terminal of a
product. On 00, A, B, C, D, and all COM attach.
01, 05, 06 and 07, A, B, C, COM1, and COM2 attach.
On 02 to 04 and 08, A, B, and COM attach.
and 11, A, B, C,
jumper is separated.
C210 and C211 are for the protection of ±S attachment.
Although, as for X68-2300-00, B2, COM2, and
written to the block diagram, this is an object for CF,
usually is not attached.
X68-2210(2300)-xx
17, 18, 20, 22. Flat and smooth circuit.
for flat and smooth of a main power supply is used. A
capacitor and an output become as it is shown in the
following table.
00
A
C301
OUTPUT
B
C302
OUTPUT
C
C303
OUTPUT
D
C304
OUTPUT
04
A
C301
OUTPUT
B
C302
OUTPUT
C303
C304
08
C301 A OUTPUT
C302 B OUTPUT
C303
C304
Moreover, C302 and C303 replace polarity based on the
jumper attached behind.
16

CIRCUIT DESCRIPTION

About -12V output.
The error amplification circuit
Control the transistor of 11.
B/6
±
COM1, COM2 and S attach, and a
D201-206, and R201, R202,
C/6
The capacitor
01,09 02
A A
OUTPUT OUTPUT OUTPUT
B B
OUTPUT OUTPUT OUTPUT
C
OUTPUT
C
OUTPUT
05 06
A A
OUTPUT OUTPUT OUTPUT
B B
OUTPUT OUTPUT OUTPUT
C C
OUTPUT OUTPUT OUTPUT
C
OUTPUT OUTPUT
X68-2300
A OUTPUT
B OUTPUT
B OUTPUT
B OUTPUT
19, 21. Pos itive/negative change -- The polarity of a
capacitor is replaced by spec code with a jumper.
X68-2210(2300)-xx
13 to 16. Regulation circuit -- A bridge diode rectifies a
main power supply.
it is shown in the following table.
D401
OUTPUT
D402
OUTPUT
D403
OUTPUT
D404
OUTPUT
On
D401
OUTPUT
On 09
D402
OUTPUT
D403
±
S are
D404
D401
D402
D403 A OUTPUT
D404
B OUTPUT
03
X68-2210(2300)-xx
A
23. The main power switch of a product is used. It
connects with a CPU unit.
B
X68-2210(2300)-xx
24. The switch
product is used.
IF UNIT (X72-154)
The optional IF unit provides the PW-A power supply
07,11
unit with additional external control functions.
A
the IF-40GU, 0-01 is the IF-40RS, and 0-02 is the IF-
40USB.
B
The CPU unit supplies +5V power.
Since these options use the same PCBs, CN1, 2 and 3
C
of the GU or USB are connected with the CPU unit and
CN4, 5 and 6 of the RS are connected with the CPU
C
unit.
(A number is a number of a block diagram)
1. CPU The CPU controls the interfaces.
unit supplies power source and clock pulses.
connected with the CPU of the CPU unit through the
buffer and bus transceiver shown in 2 and executes
communication with the PW-A unit.
2. Buffer and bus transceiver
transceiver connect the CPUs of the PW-A unit and IF
unit. They connect the CPU when the PW-A unit
D/6
A diode and an output become as
00 01 02
C C A
OUTPUT OUTPUT
D C B
OUTPUT OUTPUT
A A
OUTPUT
B B
OUTPUT
04 05 06
A C C
OUTPUT OUTPUT
B C
OUTPUT
A A
OUTPUT OUTPUT
B B
OUTPUT OUTPUT
08 X68-2300
B OUTPUT
B OUTPUT
A OUTPUT
B OUTPUT
E/6
F/6
x
2 which switches the input AC of a
It is used in a CPU unit as A1.
The buffer and bus
03
A
OUTPUT
B
OUTPUT
07,11
C
OUTPUT
C
OUTPUT
A
OUTPUT
B
OUTPUT
0-00 is
The CPU
This is