Philips MRD100/78, Service Manual

Page: 18 / 35

MAIN BOARD
TABLE OF CONTENTS
Internal IC Diagram ................................................... 6-1
Circuit Diagram (Top Left) ......................................... 6-2
Circuit Diagram (Top Right) ....................................... 6-3
Circuit Diagram (Bottom Left) .................................... 6-4
Circuit Diagram ( Bottom Right) ................................ 6-5
PCB Layout(Top View) .............................................. 6-6
PCB Layout(Bottom View) ......................................... 6-7
Voltages ..................................................................... 6-8
6-1
6-1
28 27 26 25 21
22 23
24 20 19 18
15 16
17
MUTE
Thermal
Shut dowm
10k
10k
10k
10k
25k
25k
25k
15k
Vcc1
1 2 3 4 5 6 7 8 9 10 11 12 13 14
VINFC TRB-1 RSGO2 VINSL+ REGO1 FWD REV VCC1 VOTR- VOTR+ VOSL+ VOSL- VOFC- VOFC+
MUTE BLAS VINTK TRB-2 NC VINLD GND
VCTL
NC VCC2 VOLD- VOLD+ VOTK- VOTK+
RGND
VCC1
Prc-DRV TRAY
DRIVER
Sled
Driver(4X)
Actuator
Driver(6X)
Spindle
Driver(4X)
Driver(6X)
Actuator
Vcc2
Vcc2
+
-
+
-
+ -
+ -
+ -
+ -
Internal IC diagram -V5888S HSOP
Internal IC diagram - MX29LV800BT
CONTROL
INPUT
LOGIC
PROGRAM/ERASE
HIGH VOLTAGE
WRITE
STATE
MACHINE
(WSM)
STATE
REGISTER
MX29LV800BT/BB
FLASH
ARRAY
R
E
D
O
C
E
D-
X
ADDRESS
LATCH
AND
BUFFER
Y-PASS GATE
R
E
D
O
C
E
D-
Y
ARRAY
SOURCE
HV
COMMAND
DATA
DECODER
COMMAND
DATA LATCH
I/O BUFFER
PGM
DATA
HV
PROGRAM
DATA LATCH
SENSE
AMPLIFIER
Q0-Q15/A-1
A0-A18
CE#
OE#
WE#
RESET#