Sony CBK-HD01 Maintenance Manual page 20

circuit control, microphone amplifier gain control, opera-
tional amplifier power control, and digital/analog input
switching switch information.
16. REAR XLR automatic insertion detection circuit
control (DET-47 board and sensor holder)
Combine the DET-47 board on the sensor holder and
connect with the harness to the AXM-38 board.
The infrared light emitter uses one LED that connects to
the CH1 and CH2 receivers positioned in the middle of the
sensor holder on the left and right sides. When "Detection
ON" is set from the menu and the XLR connector is
inserted into the 3P-XLR connector, the infrared light is
blocked, the output from the receivers changes from L to
H, and insertion is detected. At this time, CH1 and CH2
operate automatically and the XLR input on the REAR
area is selected. (CH3 and CH4 are not switched
automatically. ) Detection interval time is 200 ms.
17. Color LCD monitor drive control and opening/rotation
detection circuit
The CN108 connector is connected to the power supply
and the RGB signal for video, the passes through CN802 to
connect directly into the LCD driver.
FP_CPU and LCD driver are connected with synchronous
serial communication. During POWER_ON, parameters
H_AMP12CH_ON
Buffer
ATT
Buffer
ATT
Buffer
ATT
Buffer
ATT
H_AMP34CH_ON
1-10
L_A/D_PD12CH_ON
B1
DVP-45 board
PD
AK4382
AK5383
ch1
ch2
AMP
AMP AK5383
ch3
ch4
PD
AMP
FP-157 board
B2
L_A/D_PD34CH_ON
Audio Power Save Block
such as brightness and contrast can be set. This informa-
tion is saved in the LCD (PD-118 board) nonvolatile
memory and the FP-157 board IC913 (nonvolatile memo-
ry).
Rotation is detected by the rotation sensor switch in DET-
45 after passing through CN802.
Opening and closing is detected from the hole terminal
(H801) on the FP-157 board and the field intensity from
the permanent magnet (neodymium: Ne-FeB).
18. Nonvolatile memory control
IC907 on the FP-157 board is nonvolatile memory that
supports the I2C bus.
This memory stores system information such as the A/D
and D/A error compensation values and color LCD
settings. During POWER-ON, this information is sent to
ITRON (CPU) and the color LCD device.
19. Monochrome LCD display circuit with backlight
FP_CPU and IC806 (UPD7225GB) are connected by a 500
KHz serial communication port. IC806 is an LCD
controller/driver that is programmable with software.
ND800 displays the BATTERY value, DISC capacity,
time, and counter value on the monochrome LCD at three
hour intervals.
FP_H_AUOUT_ON FP_H_AUIN_ON
CNB-25 board
AMP
ch1
FIL
TER
AMP
ch2
AMP
Monitor-OUT
AXM-34 board
STEREO
MONO
MIX/CH1/CH2
MA-162 board
RX-101 board
FrontMIC-1
FrontMIC-2
B3 B4
ch1
ch2
REAR-1
(-3,0,4 dB standard ATT)
REAR-2
PDW-700/V1 (E)