7-3
The actual configuration of the PC board can be seen by viewing the top and bottom BOARD LAYOUT pages together.
PH
E
PHOR
PH
E
PHOL
PH
E
PHNI
GN
D
DASH
DO
T
GN
D
J1
C1
C2
C4
C101
C102
EP1
EP2
EP3
EP101
EP102
J1
J102
J103
R1
R2
B-8553B JACK
H0
H5
H10
H15
H20
H25
H30
H35
H40
H45
H50
V0
V5
V1
0V
15
V20
V2
5V
30
ELEC-KEY
PHONES
See the PARTS LIST H/V location on the PARTS LIST for location details.
J107
J108
H0
H5
H10
H15
H20
H25
H30
V0
V5
V1
0V
15
V2
0
• USB UNIT B-8551D
(TOP VIEW)
• SD UNIT B-8552D
(TOP VIEW)
• VR UNIT B-8554C
(TOP VIEW)
• PBT UNIT B-8557B
(TOP VIEW)
• MULTI UNIT B-8556B
(TOP VIEW)
• MIC UNIT B-8550C
(TOP VIEW)
• JACK UNIT B-8553B
(TOP VIEW)
GN
D
MFDA
K
MF
K
NC MFDB
K
GN
D
GN
D
GN
D
GN
D
GN
D
J2
S1
MULTI
B-8556B
TO DISPLAY J771
J2
J2
H0
H5
H10
H15
V0
V5
V10
V15
J1
MIC
B-8550C
MP1
H0
H5
H10
H15
H20
V0
V5
V10
V15
V20
J1
SDDAT2 SDDAT3 SDCM
D
GN
D
VDD(3R3V) SDCLK SDCD SDDAT0 SDDAT1 GN
D
SDWP GN
D
GN
D
GN
D
SD
J1
B-8552D
R1
0
R9
R8
R7
R6
R5
R2
R1
J2
J1
EP
4
C2
C1
H0
H5
H10
H15
H20
H25
H30
V0
V5
V10
V15
V20
V25
V30
V35
J1
GN
D
PBBAK
PBBBK
PBAAK
PBABK
PBT
K
3R3V
KSPD
L
PTCHL
GN
D
TWIN-PBT
PITCH
KEY SPEED
C1
C2
J1
R1
R2
R3
S1
PBT
B-8557B
J1
H0
H5
H10
H15
H20
H25
H30
H35
H40
H45
V0
V5
V1
0V
15
V2
0
VLED
+
VLED
–
J2
VLED
–
VLED
+
GN
D
AFSK
AFSL
RFSL
AFMK
AFML
RFML
3R3V
J1
R2
R1
VR
B-8554C
J1
J2
R6
R5
R4
R3
J2
J1
EP3
EP2
C4
C3
C2
C1
H0
H5
H10
H15
H20
H25
H30
H35
H40
H45
H50
V0
V5
V10
V15
V20
RF/SQL
SUB
AF
RF/SQL
MAIN
AF