Sharp SF-1014 Service Manual Page 116

  • Download
  • Add to my manuals
  • Print
  • Page
    / 153
  • Table of contents
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 115
(3) LED display
The LED is lit up by the signal matrix of MDL0 (Q1) MDL1 (Q2) and
F0 (Q3) F20 (Q23).
By turning on/off ports F0 F20 with the timing of MDL0 and MDL1,
the LED at the matrix cross point is lighted up.
5. Power section
Each AC voltage generated by the power transformer in the AC PWB
unit is full-wave rectified and smoothed to stabilize each voltage (UH,
UB, VD) in the main PWB side, and is supplied to loads.
(1) Signal name and output voltage
GND: 0V
VH: +30 44V (Separated into 24V and 32V supply in the main
PWB.)
VD: +24V 35V (Forms 5V supply in the main PWB.)
FW: Full-wave rectification
AC PWB unit
DTB113ZS
+5V1
RDL1
PEL
MDL0 MDL1
Q1
Q2
F1
Q4
LC7935
GND
MDL0
GND
MDL1
GND
FO
2m sec
RDL1-ON
PEL-ON
Cycle 4 msec 1/2 duty
10~14VFW
VH
CNE-1
F504
CNB-5
POWER TRANS
CNA-3
F503
~~
_
+
+
_
~~
F505
CNB-6
CNB-1
CNB-2
RBV-608
BD501
S1NB60
BD502
C509
6800uF 50V
C510
2200uF 25V
R508
24KJ
VD
VH
GND(VH)
GND(VH)
GND(VD)
CNE-2
CNE-3
CNE-4
CNE-7
CNE-8
FW
GND(FW)
CNE-5
CNE-6
+
_
~~
CNB-3
CNB-4
S1ZB60
BD503
CNA-1
L2
N1
12 – 13
Page view 115
1 2 ... 111 112 113 114 115 116 117 118 119 120 121 ... 152 153

Comments to this Manuals

No comments