Philco DVCR101, Руководство по обслуживанию

Страница: 10 / 51

- 9
Signal process and signal flow for DVCR101
The player is composed of main PCB, decoding-servo PCB, controlling PCB and power PCB.
VIDEO input VIDEO output AUDIO output AUDIO input
VIDEO VIDEO
For parts and component, please refer to Table 1. CPU (M37760M8H) is on main PCB. After the player
is powered on, CPU is reset by resetting chip. Crystal oscillator provides the clock signal with power
supplied, and the program starts to work then enter standby mode (software default). In standby mode,
power PCB provides voltage for main PCB. The voltage provided for DVD is low level, so in standby
mode, DVD part doesn’t work, instead main CPU on PCB in operation mode. Data will be transmitted
through 5 communication cables (CLK STB DATA IN DATA OUT, IR between DVD and VCR.
Press the POWER button; main CPU will switch to logo by switch selector (BU4053BCF). Remote
BU4053BCF
Video selection
switch
Power PCB
Supply for DVD and VCR
MT-1379CE
Servo, decode, encode
Optical pickup
Pick up the
photoelectric signal
AN3663FBP
High frequency
selection and Hi-Fi
process
VFD
Operation display
MT1336E
RF process and servo
M37760M8H
MICRO PROCESSOR
LA71207M
Video process
CA4340
AUDIO D/A
RC4558D
Amplify
HY57V641620SDR
AM
29LV800BA
FLASH
BA5954FM
Control the motor
AUDIO
VIDEO
Fig.1