Yamaha DSP-AX2700 Service Manual page 123

A B C
FL 1/2
1
5.0 5.0 5.0 5.0
-23.5
-23.4 -25.5 -27.5
2
-23.5 -20.9 -26.7 -22.9
5.0 5.0 5.0 5.0
-27.5 -27.5
-27.5 -23.5
-21.4 -23.0 -27.0 -27.1
3
4
-21.9
-25.6
5
-29.3
6
5.0
-27.3
-27.0
7
8
RX-V2700 (U, C, R, T, K, A, B, G, E, L models)
Key input (A-D) pull-up resistance 10k-ohms
Ohm 0 +1.2k +1.2k
V 0-0.26 0.27-0.75 0.76-1.22
Key0
NIGHT ZONE CONTROLS TUNING MODE
(124pin/AN156)
Key1 STRAIGHT/
A/B/C/D/E –
(123pin/AN157) EFFECT
9
DSP-AX2700 (J model)
Key input (A-D) pull-up resistance 10k-ohms
Ohm 0 +1.2k +1.2k
V 0-0.26 0.27-0.75 0.76-1.22
Key0
NIGHT – TUNING MODE
(124pin/AN156)
Key1 STRAIGHT/
A/B/C/D/E –
(123pin/AN157) EFFECT
10
D E F
-27.3 21.4
-27.5 -23.5
-25.3 -21.4
-27.3 -23.5
-25.3
-23.3
FL DRIVER
-27.3
-25.3
-27.3 5.0
-25.3 0.1
-23.3 0.1
-19.3 4.9
-21.2 4.9
-19.3 2.4
-27.3
2.4
-27.5 0
-21.3 -21.5
-29.5 -23.5
-27.5 -23.5
-27.5
FL DRIVER -22.9
-27.4
-21.4
-27.5
-27.5
-27.5 5.0
-25.5
0
-25.5 0
-23.4 4.9
-21.4
4.9
-23.4
2.5
2.5
-25.5
2.6
-27.5
0
0
0 0
0 0
+1.8k +2.7k +3.3k +4.7k +8.2k +18.0k
1.23-1.76 1.77-2.28 2.29-2.75 2.76-3.24 3.25-3.75 3.76-4.25
PRESET/ PRESET/TUNING PRESET/TUNING
MEMORY FM/AM –
TUNING > <
TONE CONTROL AUDIO SELECT PURE DIRECT – – –
+1.8k +2.7k +3.3k +4.7k +8.2k +18.0k
1.23-1.76 1.77-2.28 2.29-2.75 2.76-3.24 3.25-3.75 3.76-4.25
PRESET/ PRESET/TUNING PRESET/TUNING
MEMORY FM/AM –
TUNING > <
TONE CONTROL AUDIO SELECT PURE DIRECT – – –
G H
Page 124 I4
to FL (2)_CB970
Page 116 K3
to OPERATION (4)_CB12
0
0
0 0
0
0
0
0
0
-0.1 0
0
0
FL (1)
+47.0k
4.26-4.72
–
–
+47.0k
4.26-4.72
–
–
I J K
11.2
10.5 11.2
10.9
0.1
4.9
0
11.2
11.2
10.6
10.9
0.1
4.9
0
4.2
5.1
5.1
0 Page 112 C8
10.0
0.1 -9.2
to FUNCTION (1)_CB405
0
2.6
5.1
-2.4
-9.7 4.9
9.5 0.1
0 5.1
FL (6)
IC901, 902: PT6302LQ
VFD driver/controller IC with caracter RAM
VDD
VSS
VEE
RSTB
DIN
CLKB
CSB
OSCO
OSCI
IC951: ADM222ARZ
High speed RS-232 line drivers/receivers
# All voltages are measured with a 10MΩ/V DC electronic voltmeter.
# Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
# Schematic diagram is subject to change without notice.
L M N
RX-V2700/DSP-AX2700
SG1
CGROM
248 words x 35 bits
DCRAM
16 words x 8 bits SEGMENT
DRIVER
CGRAM
8 words x 35 bits SG35
8-BIT
SHIFT
REGISTER
AD1
ADRAM
AD
16 words x 2 bits
ADDRESS DRIVER
AD2
SELECTOR
COMMAND
DECODER
WRITE READ
ADDRESS ADDRESS P1
COUNTER COUNTER PORT
DRIVER
P2
CONTROL
CIRCUIT DIGITAL
GR1
CONTROL
GRID
DRIVER
DUTY
CONTROL
GR16
TIMING TIMING
GENERATOR 1 GENERATOR 2
OSCILLATOR
+5V INPUT
0.1∝F
0.1∝F
V
C1+ CC
0.1∝F +5V TO +10V
V+
VOLTAGE DOUBLER
C1–
C2+
+5V TO –10V
V–
0.1∝F VOLTAGE INVERTER
0.1∝F
C2–
T1
IN T1 T1
OUT
TTL/CMOS
RS-232
INPUTS * OUTPUTS
T2 IN T2 T2
OUT
R1 R1 R1
OUT IN
TTL/CMOS RS-232
OUTPUTS INPUTS **
R2 R2
R2 IN
OUT
ADM2xx EN (ADM242)
SHDN (ADM222, ADM242)
GND
* INTERNAL 400k W PULL-UP RESISTOR
ON EACH TTL/MOS INPUT
**
INTERNAL 5k W PULL-DOWN RESISTOR
ON EACH RS-232 INPUT
123