Yamaha Portatone PSR-1000 Service Manual page 17

A B C
PSR-2000 OVERALL CIRCUIT DIAGRAM ( DM1/2, INV )
1
to AM-CN106
DM
2
INV
3
V420040
ATTENTION
High Voltage
4
to PN1-CN1
5
to MKS5F-CN1
6
to AM-CN300
7
Floppy Disk Drive
8
9
10
LCD
Note: See parts list for details of circuit board
component parts.
to AM-CN303
11
: Mylar Capacitor
: Ceramic Capacitor
: Metal Oxide Film Resistor
12
PSR-2000
A B C
D E F
(IC205-12p, IC206-12p, IC915,196-12p)
1/2 (IC207-12p, IC917-26p)
(IC303-4, 10p, IC911-4p)
(IC308-1p, IC310-2p)
(IC308-15p, IC310-1,9p)
DC-DC (CN600-22p)
REGULATOR +3.3V SYSTEM RESET (CN600-21p)
CONVERTER
(IC100-193p, IC915-16p,
IC916-16p)
COMPARATOR
(IC200-19p)
(IC200-67p)
(IC911-5p)
(IC200-18p)
(IC100-207p) (IC911-3p)
(IC911-8p)
(IC300-7p)
(CN906-1p)
NAND
(CN109-11p)
(CN500-14p)
BUFFER
BUFFER
(IC911-18p)
(IC911-17p)
(IC100-171p)
(IC100-166p)
AND
(IC100-169p)
(IC100-203p)
(IC100-172p)
(IC100-166p)
(IC100-118p) (IC100-200p)
(IC100-199p)
(IC911-15p)
FDC
SRAM 256K
(IC301-7p)
(IC911-15p)
LCDC
(IC911-14p)
(IC911-11p)
(IC100-119p)
(IC911-15p)
INVERTER
D E F
G H I J
(IC301-9p, IC200-17p)
(IC205-14p, IC206-14p, IC-207-14p, IC911-6p, IC915-54p, IC916-54p, IC917-28p)
(IC911-7p, IC915-55p, IC916-55p, IC917-11p)
(IC911-9p)
(IC100-91p)
CPU
(IC100-164p)
(IC100-110p)
(IC100-100p)
(IC100-107p)
(IC100-88p)
(IC100-89p)
(IC100-113p)
(IC100-90p)
AND
(CN600-23,24p)
(IC100-100p)
(IC100-100p)
(IC100-102p)
(IC100-101p)
(IC100-102p)
BUFFER BUFFER
BUFFER
(IC911-14p)
(IC911-11p)
(IC308-6p)
(IC100-101p)
(IC100-114p)
(IC100-100p)
BUFFER BUFFER BUFFER
ADC
: installed
: not installed
OP AMP
G H I J
K L M
FRASH ROM 32M
PROGRAM-L
SDRAM 64M
(IC100-96p)
(IC100-88p) (IC100-96p)
(IC100-90p) (IC100-156p)
(IC100-89p)
(IC100-93p)
(IC001-4p)
(IC100-108p)
(IC100-162p)
(IC100-106p)
(IC100-99p)
(IC100-105p)
(IC100-92p)
PROGRAM-L ROM:
IC205 (MASK) or
IC915 (FLASH) installed
FRASH ROM 32M
PROGRAM-H
(IC100-96p)
(IC100-96p)
(IC100-88p)
BUFFER
(IC100-156p)
(IC001-4p)
(CN102-2p)
(CN102-3p)
(IC204-26p)
(IC204-11p)
(IC300-3p, IC500-10p, IC700-24p, IC800-16p, IC914-13p)
(IC204-28p, IC300-4p, IC500-13p, IC400-35p, IC401-135p)
(IC400-234p, IC401-101p)
(IC300-5p, IC500-14p, IC400-34p, IC401-136p)
DECODER
(IC100-102p)
(IC500-19p) (IC400-33p)
(IC300-6p) (IC401-134p)
DAC
(IC400-77p)
(IC400-76p)
(IC400-222p)
(IC400-225p)
(IC911-15p)
(IC400-64p)
(IC400-224p)
(IC400-222p)
(IC400-66p)
(IC911-15p)
to AM-CN101
K L M
N O P Q
PSR-2000
FRASH ROM 64M
STYLE/PARA
(IC100-89p)
(IC100-88p)
(IC100-98p)
(IC100-88p)
(IC100-88p)
(IC100-98p)
(IC100-89p)
STYLE/PARA ROM: IC207 (MASK) or IC917 (FLASH) installed
FRASH ROM 8M
DATA STORAGE
(IC100-89p)
(IC100-88p)
(IC911-13p)
(IC911-14p)
(IC911-16p)
PROGRAM-H ROM:
IC206 (MASK) or
IC916 (FLASH) installed
ADDRESS BUS
DATA BUS
to DM 2/2 : A-6 (PSR-2000)
to DM 2/2 : A-6
(PSR-2000)
(IC100-204p)
(IC100-206p)
(IC100-103p)
(IC100-104p)
to PN1-CN2
Transistor
Array
DECODER
OP AMP
(IC100-116p)
to AM-CN103
OP AMP
REGULATOR +5V
28CC1-8819917
6
PSR-2000
N O P
Q
1
2
3
4
5
6
7
8
9
10
11
12