BOSSCO PH-2 Operating and maintenance manual

OCT. 1984 PH-2
OBD55PM
SPECIFICATIONS
SERVICE NOTCSI
First Edition
Power Source 9V DC Gain Unity
(Battery, or AC Adaptor) Input Impedance ^N\Fl
Current Draw 20mA (max.) at 9V Output Load Impedance more than 10kl2
Phase Shift 12 stages (2160°) Dimensions 70(W) X55(H) X125(D) mm
LFO Speed 14s to 100ms 2-3/4^'(W) x2-3/16"(H) x4-1
Residual Noise less than —SOdBm (IHF-A) Weight 410 g/14 oz.
Maximum Input —5dBm
Jack HEC-0749-01 -01
O
(13449704)
Pot.-
K12140054-100KB
(13279760)
Pot.
K12140054-250KC
(13279761)
Jack SG-7615-
(13449105)
Pedal (2218053500)-
All knobs
(2247026000)
4>OUTPUT MPUTf* L
SUP€R
Phaser
-• PH-2
LED SLP-135B
(15029117)
Pot.
K12140054-10KB
(13279759)
Switch SRU-1022
(13119101)
Jack SG-7713i*4
(13449104)
Base (2235030400)
Cushion
(2226033300)
Battery snap
(2341041400)
Thumb screw
3X10mm
Switch JM-0404
(13129710)
Coil spring
(2217010900)
Guide bushing
(2215070201)
Case
(2201017800)
Cover
(2202011601)
Base
(2235030500)
PARTS LIST
2201017800 Case
2218053500 Pedal
2202011601 Cover bottom
2235030500 Base bottom
2235030400 Base (pedal mat)
2215070201 Guide bushing
2247026000 Knob
2341041400 Battery snap
2226033300 Cushion
2217010900 Coil spring
JACK
13449704 HEC-0749-01-010 AC adaptor
13449105 SG-7615 OUTPUT
13449104 SG-7713#4 INPUT
SWITCH
13129710 JM-0404 KEY
13119101 SRU 1022 MODE
POTENTIOMETER
13279759 K12140054 10KB RES
13279760 K12140054 100KB DEPTH
13279761 K12140054 250KC RATE
13299311 EVN-31CA00B14 trimmer
1^Roland
PCB
7522651000 MAIN board
(pcb 2291098500-1/2)
7522652000 VR board
(pcb 2291098500-2/2)
2291049600 LED mounting, less parts
SEMICONDUCTOR
15229801 IR3109 operational
transconductance amp
15219128 NE571 compander
15159129 HD14053BP triple 2-channel
analog multiplexer
15189115 IR9022 dual low-power
OP amp
15189136 M5218L OP amp
15139101 2SK30A(TM) -Y FET
15129108 2SC945-P transistor
15019103 1S2473 diode
15019209 S5500G diode
15019526 RD5.6EB-3 zener
15029117 SLP-135B LED
Printed in Japan be-2 1

FILTER
200Hz
200mVp-p
The waveform will vary
between the extremes
shown in photos, re-
spectively.
Sweep rate should be
14s with RATE at
FCCW and 100ms at
FCW.
RESONANCE
rate depth
RATE DEPTH
RATE DEPTH RES
WAVEFORM &REMARK
CHECK INPUT SET CONTROLS
ADJUSTMENT AND CHECKING
1. Feed the test signal to INPUT of the PH-2.
2. Connect the scope to OUTPUT of the PH-2.
3. Push Pedal once if the LED is unlit (EFFECT OFF).
NOTE: The indicator fails to light when the DC is
below 6V.
The amplitudes in the table are taken with
accurate 9V source and will vary as the vol-
tage fluctuates.
50mV/div; 0.5ms/div
kT-H
W“Adjust RT-1 on VR
Board for T=1ms.
NOTE: DEPTH remains slightly effective even at FCCW
position; the waves will jitter.
RESONANCE
MODE I
MODE n
MODE n

miniature components
RESISTOR
VR BOARD
7522652000
(pcb 2291098500-2/2) R16U 1/6W Vertical forming 13809173T0 100
13809177X0 150
13809189X0 470
13809191X0 560
13809205X0 2.2K
13809213X0 4.7K
13809215X0 5.6K
13809221X0 lOK
13809223X0 12K
13809227X0 18K
13809229X0 22K
13809233X0 33K
13809237X0 47K
13809239X0 56K
13809241X0 68K
13809245X0 lOOK
13809269X0 IM
MAIN BOARD
7522651000
(pcb 2291098500-1/2)
.-CJ5 ELECTROLYTIC CAPACITOR
yF/v
13639276J0 0.47/50
13629402 1/50
13629346 10/16
13629309 47/6.3
13629345 4.7/16
13629150J0 100/16
13629128J0 33/10
SRA50VBR47
SRE50VB1
SRE16VB10
SRE6.3VB47B3
SRE16VB4R7
SRA16VB100MF
SRA10VB33
CIRCUIT DIAGRAM
EFFECT BOARD
C5
10/16 IR3109
0.0047 22K C24
'470P C23
’470P
M5218L C8
100P;
C15 Z
10/16] C14
.10/16) CIS
0.47/50
BATT
9V
IC9A IR3109
C33^
0.00271
AC
ADAPTOR :C37
470P :C26
470P
S5500G
C11 R16 C12
0.0047 22K 0.47/50
C13
10/16 OUTPUT
:C25 2
100/16
LED
SLP135B C40
470P
C47 C48
33/10 33/10
DEPTH
(VR-2)
^100KB
(W)SW-1
10KB MODE
C49
10/16 NORMAL/EFFECT
RATE
(VR-3)
250KC
VR BOARD
NE571
IR9022
HD14053
2SK30A-Y
2SC945-P S5500G
1S2473
RD5.6EB-3
PH-2
—
OCT.
1984

PH-2 ELECTRICAL PARTS CHANGE INFORMATION
EFFECTIVE SEREIAL NUMBER ~497100
FOR NOISE REDUCTION
CHANGE TO:
R65 4.7K 12K
R66 6.8K 4.7K
R68 lOK 5. 6K
R70 18K 6. 8K
R72 22K 8. 2K
R74 4.7K lOK
R76 12K 22K
R79 lOK 27K
R89 6. 8K 5. 6K
C12 0.47/50 0.1/50
COMPATIBLE PARTS
CHANGE TO:
IC2: NE571 NE571 (UPC1571 )OR NE570 (15219108)
IC 3,5,8,10:
IR9022 IR9022 OR TL022 (15189115)