Explanation; Circuit Descriptions - Pioneer AVIC-505 Service Manual

7.3 EXPLANATION

7.3.1 CIRCUIT DESCRIPTIONS

- Average speed/increased speed switch-over
RF EQ circuit
In previous CD mechanism module circuits, the basic
average speed/increased speed RF EQ circuit was used,
but in the CXK5052 by changing over to an RF EQ
circuit which has been optimized in regards to the
playback speeds of both average speed and increased
speed, we are aiming at increased performance in
regards to skew offset, etc.
- New externally-attached LPF circuit on the PLL
for increased speed
An LPF is needed to use the VCO contained within the
UPD63702AGF at double speed. To show the optimized
performance of the main IC UPD63702AGF, the circuit
configuration has been changed from the previous
externally-attached LPF circuits used with the
UPD63703GF (C203, R204, C205 etc.).
C127
C105
R105
C125
5Pin UPC2572GS
IC101
Average speed
C105
R105 R104
C125
<Average speed/increased speed switch-over RF EQ circuit>
C203
R203
POUT 32Pin
VCO 34Pin
UPD63702AGF
AVIC-505
REFO
Q104
SCONT
Q103 Increased
H:Increased speed
speed:GND
L:Average speed
Average
speed:REFO
R118
R104
6Pin
C127
Increased speed
C105
R105 R104
C125
C205
R204
R205
CTLV 31Pin
C204
vco 35Pin
95