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1
LATER PRODUCTION UNITS WITH
LIGHT PRESET CONTROL / SWITCH
D
BLACK
F101
BLACK
BLACK
BLACK
J101
BLACK
SEE NOTE 1
LINE
ALPS SDT-7
GREEN / YELLOW
POWER SWITCH
GROUND
WHITE
SEE
SW101
NEUTRAL
WHITE
NOTE 6
WHITE
AC INLET
CM-3
C
NOTES:
1- FUSE F101 IS PRESENT ONLY ON THE 240V VERSION OF THE BHTU STAND.
2- THE UYPC48 PCB SCHEMATIC ON PAGE 98 OF THE OLYMPUS BH2(BHS) REPAIR MANUAL DIFFERS FROM THE SCHEMATIC
PRESENTED HERE IN THE WIRING OF THE BAR-GRAPH LEDS AND THEIR CURRENT-LIMITING RESISTORS. SEE DETAIL 1.
3- THE UYPC48 PCB SCHEMATIC ON PAGE 98 OF THE OLYMPUS BH2(BHS) REPAIR MANUAL DIFFERS FROM THE SCHEMATIC
PRESENTED HERE IN THE WIRING OF THE CONTROL VOLTAGE CLAMP. SEE DETAIL 2.
4- THE AVERAGE DC VOLTAGE ON THIS NODE VARIES FROM APPROXIMATELY +10.5V (AT MINIMUM LAMP VOLTAGE)
TO +7.6V (AT MAXIMUM LAMP VOLTAGE), DUE TO INCREASED RIPPLE AT HIGHER CURRENT DRAINS.
5- SEE APPENDIX 2 FOR EARLY PRODUCTION UNITS THAT DO NOT HAVE A LIGHT PRESET CONTROL / SWITCH.
B
6- NEVER OPERATE THE MICROSCOPE WITHOUT THE CENTER TERMINAL OF THE AC INLET ELECTRICALLY BONDED TO THE CHASSIS.
7- W201, W202, W203, AND W204 (NOT SHOWN IN THE SCHEMATIC) ARE ZERO-OHM CIRCUIT JUMPERS INCLUDED TO ALLOW
A SINGLE LAYER PCB. THESE COMPONENTS ARE PRESENT ON EARLY PCBS ONLY.
FILTERED
FILTERED
DC SUPPLY
DC SUPPLY
(+)
(+)
A
(ONE OF FOUR)
(ONE OF FOUR)
AS PUBLISHED IN THE
ACTUAL CIRCUITRY
OLYMPUS REPAIR MANUAL
ON THE UYPC48 BOARD
- DETAIL 1 -
DISCREPANCY WITH OLYMPUS SCHEMATIC
- BAR-GRAPH LEDS -
SEE NOTE 2
1
2
SEE NOTE 5
INTENSITY
BLUE
BLUE
2
SLIDER
BRT
RED
1
RV101
ORANGE
500
R5
J2
OHM
500
RED
NOBLE
OHM
BRT
DV2288-01 LIGHT PRESET BOARD
T101
115V (240V)
BLUE
BLACK
BLACK
100V (220V)
VIOLET
VOLTAGE
SELECT
WHITE
BLACK
SW102
BROWN
POWER TRANSFORMER
DT 0103 (115V)
DT 0104 (240V)
BLACK
HALOGEN LAMP
BLACK
6V/20W, G4 BASE
OLYMPUS 8-C405
J103
LAMP HOUSE
LS20H (OLYMPUS 5-LB402) OR
LS20H-M2 (OLYMPUS 5-S119)
D201
D201
FILTERED
DB101 (+)
DC (+)
DB101 (+)
+
SUPPLY
C201
R214
R214
A
D204
D204
D202
D203
D203
A
ACTUAL CIRCUITRY
AS PUBLISHED
ON THE UYPC48 BOARD
IN THE OLYMPUS
REPAIR MANUAL
- DETAIL 2 -
DISCREPANCY WITH OLYMPUS SCHEMATIC
- CONTROL-SIGNAL CLAMP -
SEE NOTE 3
2
4
BLUE
3
RED
ORANGE
2
ORANGE
1
J1
BLACK
DB101
RED
S15VB10
BLACK
SEE DETAIL 3
RED
1
BLUE
2
RED
3
ORANGE
4
BLUE
5
BLACK
6
VIOLET
7
A
YELLOW
8
J1
Q101
2SD867
BROWN
VIOLET
C202
.047uF
YELLOW
POWER
TRANSISTOR
SEE DETAIL 4
Q201
2SA817
OLYMPUS UYPC48
FILTERED
REAR OF BASE
DC (+)
+
SUPPLY
C201
AC
BLACK
A
IN
D202
RED
POS
AND
A
OUT
BLACK
- DETAIL 3 -
PINOUT OF BRIDGE
RECTIFIER DB101
-INSTALL WITH THERMAL PASTE-
(VIEW FROM TOP OF BASE)
3
D201
1N4002
+ C201
R214
47uF
R203
10k
25V
820
A
1/8W
1/8W
P/O P1
D204
SEE
LED
1N4148
NOTE 3
"A"
D203
POWER
1N4148
D202
1N4148
R208
A
A
4.3k
1/8W
R201
0.1 OHM
5W
Q202
2SA817
R209
2k
1/8W
R202
200 Ohm
1/8W
R213
R210
10k
1.5k
1/8W
1/8W
R211
1.8k
1/8W
R212
2k
1/8W
A
REAR OF BASE
BLUE
NEG
C
AND
OUT
BROWN
VIOLET
B
E
YELLOW
BROWN
AC
BLACK
IN
- DETAIL 4 -
PINOUT OF POWER
TRANSISTOR Q101
-INSTALL WITH THERMAL PASTE-
(VIEW FROM TOP OF BASE)
3
4
REV
REVISION DESCRIPTION
DATE
ECO #
1
Initial Release
3-10-16
---
+7.6 TO +10.5 VDC SEET NOTE 4
SEE
NOTE 2
P/O P1
LED
LED
LED
LED
"B"
"C"
"D"
"E"
2V
4V
6V
7V
R204
R205
R206
R207
820
820
820
820
4
3
1/8W
1/8W
1/8W
1/8W
+
1
2
-
IC1-A
uPC324C
11
NEC
A
12
14
13
IC1-D
uPC324C
NEC
5
7
6
IC1-B
uPC324C
NEC
10
8
9
IC1-C
uPC324C
NEC
COPYRIGHT (C) 2016 CARL HUNSINGER
- APPENDIX 3 -
OLYMPUS BH-2 (LATER)
BHT/BHTU ELECTRONICS
REVISION 1
4
D
C
B
A