Yamaha HTR-6290 Service Manual page 140

A B C
RX-V1900/HTR-6290/DSP-AX1900
FL 1/2
1
5.0 5.0 5.0
-23.4 -25.5
-23.5 -20.9 -26.7
2
5.0 5.0 5.0
-27.5
-27.5 -23.5
-21.4 -23.0 -27.0
3
4
5 W9001
-21.9
-25.6
-29.3
6
7
8
9
10
140
D E F
5.0
-23.5
-27.5
-22.9
-27.3
21.4
-27.5 -23.5
-21.4
-25.3
-23.5
-27.3
-25.3 FL DRIVER
-23.3
-27.3
5.0
-25.3
-27.3
-27.5
-25.3
IC901
-23.3
-27.1
-19.3
-21.2
-19.3
-27.3 2.4
-27.5 0
-21.3 -21.5
-23.5
-29.5
-23.5
-27.5
-22.9
-27.5
-27.4
-21.4
-27.5
-27.5
-27.5 5.0
-25.5 0
-25.5 0
-23.4 4.9
FL DRIVER
-21.4 4.9
-23.4
2.5
-25.5
2.6
5.0
-27.5
0
-27.3
-27.0
ENTER
INFO CATEGORY
STEREO/
MONO
G H
5.0
0.1
0.1
4.9
4.9
2.4
2.5
0
0 0
0 0
0
0
0
0
0
0 0
0
0
-0.1
0
0 0
SEARCH MODE
MEMORY
FL (1)
I J K
11.2
10.5
10.9
0.1
JK951
JK952
0
11.2
10.6
10.9
0.1
4.9
0
Page 130 J4
CB968
to OPERATION (5)_CB809
RS-232C
W9002
Page 141 K5
to FL (2)_CB970
CB901
W9003
Page 130 L3
to OPERATION (4)_CB812
Page 130 A2
to OPERATION (1)_CB801
W9004
IC951: ADM222ARZ
High speed RS-232 line drivers/receivers
+5V INPUT
0.1μF
V
C1+ CC
0.1μF +5V TO +10V
V+
VOLTAGE DOUBLER
C1–
C2+
+5V TO –10V
0.1μF V–
VOLTAGE INVERTER
C2–
T1 T1 T1
IN
TTL/CMOS
INPUTS *
T2 T2 T2
IN
R1 R1
OUT
TTL/CMOS
OUTPUTS
R2 R2
OUT
ADM2xx EN (ADM242)
GND SHDN (ADM222, ADM242)
* INTERNAL 400kW PULL-UP RESISTOR
ON EACH TTL/MOS INPUT
**
INTERNAL 5kW PULL-DOWN RESISTOR
ON EACH RS-232 INPUT
L M N
11.2
4.9
11.2
W9501
4.2
5.1
5.1
0
10.0
0.1 -9.2
2.6 0
-2.4 5.1
-9.7 4.9
9.5
0.1
5.1
0
FL (6)
IC901, 902: PT6302LQ-008
VFD driver/controller IC with character RAM
SG1
VDD CGROM
DCRAM 248 words x 35-bit
VSS
16 words x 8-bit
SEGMENT
VEE DRIVER
RSTB
CGRAM
8 words x 35-bit SG35
0.1μF
DIN
8-bit
CLKB SHIFT
REGISTER
CSB ADRAM AD1
AD
16 words x 2-bit
ADDRESS DRIVER
AD2
SELECTOR
COMMAND
DECODER
0.1μF WRITE READ
P1
ADDRESS ADDRESS
COUNTER COUNTER PORT
DRIVER
P2
CONTROL
CIRCUIT DIGITAL
OUT GR1
RS-232 CONTROL
OUTPUTS
GRID
OUT
DRIVER
DUTY
CONTROL
R1 GR16
IN
RS-232
INPUTS ** TIMING TIMING
R2 GENERATOR 1 GENERATOR 2
IN
OSCO OSCILLATOR
OSCI