Main Board - Philips MCD109/98 Service Manual

6-1

MAIN BOARD

TABLE OF CONTENTS
Internal IC Diagram ................................................... 6-1
Voltages ..................................................................... 6-2
Circuit Diagram (Top Left) ......................................... 6-3
Circuit Diagram (Top Right) ....................................... 6-4
Circuit Diagram (Bottom Left) .................................... 6-5
Circuit Diagram ( Bottom Right) ................................ 6-6
PCB Layout(Top View) .............................................. 6-7
PCB Layout(Bottom View) ......................................... 6-8
Electrical Parts list ..................................................... 6-9
Internal IC diagram - EW484M1644VTA
Internal IC diagram -V5888S HSOP
MUTE BLAS VINTK TRB-2 NC VINLD GND
28 27 26 25 24 23 22
10k
MUTE
10k
+ -
25k
Thermal
Shut dowm
25k 10k
+
-
+ -
10k
1 2 3 4 5 6 7
VINFC TRB-1 RSGO2 VINSL+ REGO1 FWD REV
6-1
VCTL NC VCC2 VOLD- VOLD+ VOTK- VOTK+
21 20 19 18 17 16 15
15k
Actuator
Spindle
+
Driver(6X)
Driver(4X)
-
Actuator
Sled
25k
Driver(4X) Driver(6X)
Prc-DRV TRAY
DRIVER
VCC1
RGND
8 9 10 11 12 13 14
VCC1 VOTR- VOTR+ VOSL+ VOSL- VOFC- VOFC+
Vcc2
Vcc2
Vcc1