Philips HTS3000/98 Service Manual page 18

6 - 1
MAIN BOARD
TABLE OF CONTENTS
Internal IC Diagram ........................................................................... 6-1
Circuit Diagram .................................................................................. 6-2
PCB Layout Top View ....................................................................... 6-3
PCB Layout Bottom View .................................................................. 6-4
Voltage .............................................................................................. 6-5
INTERNAL IC DIAGRAM - CO4558A SO8
INTERNAL IC DIAGRAM - V5888S HOSP
MUTE BLAS VINTK TRB-2 NC VINLD
28 27 26 25 24 23
10k
MUTE
+ -
25k
Thermal
Shut dowm
25k 10k
+ -
10k
1 2 3 4 5 6
VINFC TRB-1 RSGO2 VINSL+ REGO1 FWD
6 - 1
GND NC VCC2 VOLD-
VCTL VOLD+
22 21 20 19 18 17
15k
10k
Spindle
+
Driver(4X)
-
+
-
Sled
25k
Driver(4X)
Prc-DR V TRA Y
DRIVER
VCC1
RGND
7 8 9 10 11 12
REV VCC1 VOTR- VOTR+ VOSL+ VOSL-
VOTK- VOTK+
16 15
Actuator
Driver(6X)
Vcc2
Vcc2
Vcc1
Actuator
Driver(6X)
13 14
VOFC-
VOFC+