Kenwood PW-A series, Service Manual

Page: 16 / 72

PW-A
16
CIRCUIT DESCRIPTION
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.
About -12V output.
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. The error amplification circuit
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. Control the transistor of 11.
Consumption current is about 200 to 250mA.
X68-2210(2300)-xx B/6
The unit which attaches the output terminal of a
product.
On 00, A, B, C, D, and all COM attach. On
01, 05, 06 and 07, A, B, C, COM1, and COM2 attach.
On 02 to 04 and 08, A, B, and COM attach.
On 09
and 11, A, B, C, COM1, COM2 and S attach, and a
jumper is separated. D201-206, and R201, R202,
C210 and C211 are for the protection of
±
S attachment.
Although, as for X68-2300-00, B2, COM2, and S are
written to the block diagram, this is an object for CF,
usually is not attached.
X68-2210(2300)-xx C/6
17, 18, 20, 22. Flat and smooth circuit. The capacitor
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.
Moreover, C302 and C303 replace polarity based on the
jumper attached behind.
19, 21. Pos itive/negative change -- The polarity of a
capacitor is replaced by spec code with a jumper.
X68-2210(2300)-xx D/6
13 to 16. Regulation circuit -- A bridge diode rectifies a
main power supply.
A diode and an output become as
it is shown in the following table.
X68-2210(2300)-xx
x
E/6
23. The main power switch of a product is used. It
connects with a CPU unit.
X68-2210(2300)-xx F/6
24. The switch 2 which switches the input AC of a
product is used. It is used in a CPU unit as A1.
IF UNIT (X72-154)
The optional IF unit provides the PW-A power supply
unit with additional external control functions. 0-00 is
the IF-40GU, 0-01 is the IF-40RS, and 0-02 is the IF-
40USB.
The CPU unit su5V power.
Since these options use the same PCBs, CN1, 2 and 3
of the GU or USB are connected with the CPU unit and
CN4, 5 and 6 of the RS are connected with the CPU
unit.
(A number is a number of a block diagram)
1. CPU
The CPU controls the interfaces. The CPU
unit supplies power source and clock pulses. This is
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
The buffer and bus
transceiver connect the CPUs of the PW-A unit and IF
unit. They connect the CPU when the PW-A unit
00 01,09 02 03
C301
A
OUTPUT
A
OUTPUT
A
OUTPUT
A
OUTPUT
C302
B
OUTPUT
B
OUTPUT
B
OUTPUT
B
OUTPUT
C303
C
OUTPUT
C
OUTPUT
C304
D
OUTPUT
C
OUTPUT
04 05 06 07,11
C301
A
OUTPUT
A
OUTPUT
A
OUTPUT
A
OUTPUT
C302
B
OUTPUT
B
OUTPUT
B
OUTPUT
B
OUTPUT
C303
C
OUTPUT
C
OUTPUT
C
OUTPUT
C304
C
OUTPUT
C
OUTPUT
08 X68-2300
C301 A OUTPUT A OUTPUT
C302 B OUTPUT B OUTPUT
C303 B OUTPUT
C304 B OUTPUT
±
±
08 X68-2300
D401
A OUTPUT
A OUTPUT
D402
B OUTPUT
B OUTPUT
D403
B OUTPUT
D404 B OUTPUT
D401
C
00 01 02 03
OUTPUT
C
OUTPUT
A
OUTPUT
D402
D
OUTPUT
C
OUTPUT
B
OUTPUT
B
OUTPUT
D403
A
OUTPUT
A
OUTPUT
A
OUTPUT
D404
B
OUTPUT
B
OUTPUT
D401
A
04 05 06 07,11
OUTPUT
C
OUTPUT
C
OUTPUT
C
OUTPUT
D402
B
OUTPUT
C
OUTPUT
C
OUTPUT
B
OUTPUT
D403
A
OUTPUT
A
OUTPUT
A
OUTPUT
D404
B
OUTPUT
B
OUTPUT