A
B
C
D
1
2
3
4
D
C
B
A
4
3
2
1
REV
REVISION DESCRIPTION
DATE
ECO #
A
A
A
A
A
A
A
A
A
A
R212
2k
1/8W
Q202
2SA817
+ C201
47uF
25V
R209
2k
1/8W
D203
1N4148
D201
1N4002
+
R204
820
1/8W
R201
0.1 OHM
5W
3
2
11
1
4
+
-
IC1-A
uPC324C
NEC
R203
820
1/8W
LED
"B"
2V
R211
1.8k
1/8W
12
13
14
IC1-D
uPC324C
NEC
R207
820
1/8W
5
6
7
IC1-B
uPC324C
NEC
LED
"E"
7V
R210
1.5k
1/8W
D202
1N4148
D204
1N4148
LED
"A"
POWER
10
9
8
IC1-C
uPC324C
NEC
R213
10k
1/8W
R214
10k
1/8W
RV101
500
OHM
NOBLE
Q101
2SD867
J101
DB101
LED
"C"
4V
R205
820
1/8W
LED
"D"
6V
R202
200 Ohm
1/8W
R208
4.3k
1/8W
R206
820
1/8W
Q201
2SA817
T101
F101
+
C202
.047uF
R5
500
OHM
BLUE
BLACK
BLUE
BROWN
BLACK
BLACK
BLUE
BLACK
BLACK
(ONE OF FOUR)
AS PUBLISHED IN THE
OLYMPUS REPAIR MANUAL
RED
POWER
TRANSISTOR
YELLOW
VIOLET
ORANGE
RED
BLUE
BLUE
RED
VIOLET
BLACK
YELLOW
100V (220V)
BLACK
BLACK
J103
VIOLET
115V (240V)
WHITE
BLACK
WHITE
VIOLET
BLACK
BLUE
GROUND
BROWN
NEUTRAL
SEE NOTE 1
LINE
CM-3
GREEN / YELLOW
AC INLET
B
C201
BLACK
WHITE
BLACK
WHITE
POWER TRANSFORMER
BLACK
- APPENDIX 3 -
OLYMPUS BH-2 (LATER)
BHT/BHTU ELECTRONICS
4- THE AVERAGE DC VOLTAGE ON THIS NODE VARIES FROM APPROXI10.5V (AT MINIMUM LAMP VOLTAGE)
TO +7.6V (AT MAXIMUM LAMP VOLTAGE), DUE TO INCREASED RIPPLE AT HIGHER CURRENT DRAINS.
RED
- DETAIL 3 -
PINOUT OF BRIDGE
RECTIFIER DB101
-INSTALL WITH THERMAL PASTE-
(VIEW FROM TOP OF BASE)
D202
SEE NOTE 5
BLACK
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.
NOTES:
AC
IN
BROWN
1
3-10-16
HALOGEN LAMP
6V/20W, G4 BASE
OLYMPUS 8-C405
OLYMPUS UYPC48
1- FUSE F101 IS PRESENT ONLY ON THE 240V VERSION OF THE BHTU STAND.
SEE
NOTE 6
6
8
AC
IN
7
J1
3
D204
D201
4
5
2
- DETAIL 1 -
DISCREPANCY WITH OLYMPUS SCHEMATIC
- BAR-GRAPH LEDS -
SEE NOTE 2
1
D202
S15VB10
REAR OF BASE
SEE DETAIL 3
1
C201
FILTERED
DC (+)
SUPPLY
P/O P1
DB101 (+)
Initial Release
DT 0103 (115V)
DT 0104 (240V)
FILTERED
DC SUPPLY
(+)
BLUE
DB101 (+)
(ONE OF FOUR)
ACTUAL CIRCUITRY
ON THE UYPC48 BOARD
ACTUAL CIRCUITRY
ON THE UYPC48 BOARD
SEE DETAIL 4
E
SEE
NOTE 2
C
YELLOW
+7.6 TO +10.5 VDC SEET NOTE 4
SEE
NOTE 3
ALPS SDT-7
POWER SWITCH
SW101
REAR OF BASE
---
VOLTAGE
SELECT
SW102
D201
D203
R214
FILTERED
DC SUPPLY
(+)
BLACK
R214
P/O P1
- DETAIL 4 -
PINOUT OF POWER
TRANSISTOR Q101
-INSTALL WITH THERMAL PASTE-
(VIEW FROM TOP OF BASE)
NEG
OUT
D204
FILTERED
DC (+)
SUPPLY
AS PUBLISHED
IN THE OLYMPUS
REPAIR MANUAL
BLACK
BLUE
AND
BROWN
POS
OUT
D203
RED
AND
BLACK
2
BRT
COPYRIGHT (C) 2016 CARL HUNSINGER
ORANGE
ORANGE
4
BRT
J2
J1
DV2288-01 LIGHT PRESET BOARD
RED
INTENSITY
SLIDER
2
REVISION 1
5- SEE APPENDIX 2 FOR EARLY PRODUCTION UNITS THAT DO NOT HAVE A LIGHT PRESET CONTROL / SWITCH.
- DETAIL 2 -
DISCREPANCY WITH OLYMPUS SCHEMATIC
- CONTROL-SIGNAL CLAMP -
SEE NOTE 3
RED
ORANGE
LATER PRODUCTION UNITS WITH
LIGHT PRESET CONTROL / SWITCH
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.
3
6- NEVER OPERATE THE MICROSCOPE WITHOUT THE CENTER TERMINAL OF THE AC INLET ELECTRICALLY BONDED TO THE CHASSIS.
LAMP HOUSE
LS20H (OLYMPUS 5-LB402) OR
LS20H-M2 (OLYMPUS 5-S119)
1
