Sanyo PLC-XP41, Service Manual

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1. No drive signals supplied at motors
Check drive signals at pins 1 and 2 of K16M for focus
motor, pins 3 and 4 of K16M for zoom motor and pins 1
and 2 of K16L for lens shift motor on Power Board.
Check drive signals at pins 2 and 10 of ICs IC1611,
IC1602 and IC1601.
Check ICs IC1611, IC1602 and IC1601 and peripheral cir-
cuits. Check motor drive power supply (9VA).
2. No drive signals supplied at motor drive ICs.
Check drive signals at pins 5 and 6 of ICs IC1611, IC1602
and IC1601. They are supplied from pins 4 and 5 for focus
drive, pins 6 and 7 for zoom drive and pins 9 and 10 for
lens shift drive of IC1641 D/A control IC.
3. No drive signals output from CPU.
The motor dive signals are supplied from IC801, main
CPU, via the IIC bus control lines.
4. No key switch signals input to CPU.
Check signals at pins 118 to 120 of IC801 when pressing
the key buttons. Check key buttons.
10
2
30
29
7
9
10
6
5 118
119
120
6
2
3
IC1602
ZOOM
MOTOR DRIVE
IC801
MAIN CPU
10
2
5
6
1
3
3
4
IC1601
LENS SHIFT
MOTOR DRIVE
CONNECT
BOARD
M
M
ZOOM
MOTOR
LENS SHIFT
MOTOR
K16L
5
4
K8T K16R
K9A
K9B
K9C
K8J
K8S
K68A
CONTROL BOARD
MAIN BOARD
DRIVE BOARD
FOCUS +
FOCUS -
LENS +
LENS -
ZOOM +
SCL
SDA
ZOOM -
TOP_DET.
CENTER_DET.
9 8 7
9 8 7
FOCUS
ZOOM LEVEL +
LEVEL -
10
2 5
4
5
6
1
2
IC1611
FOCUS
MOTOR DRIVE
IC1641
D/A
MOTOR CONTROL
M
FOCUS
MOTOR
K16M
1 3
IC1801
I/O
EXPANDER
13 14
Logic Table of IC1611/IC1602/IC1601
Input Output Operation
5 6 10 2
H L L H Forward drive
L H H L Reverse drive
H H L L Braking
L L - - Stand by
Lens Motor Problems
Troubleshooting