Service Manuals, User Guides, Schematic Diagrams or docs for : Pioneer Car Audio pioneer_cx916_167
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ORDER NO.
CRT2300
CD MECHANISM MODULE
CX-916
- This service manual describes the operation of the CD mechanism incorporated in models listed in the
table below.
- When performing repairs use this manual together with the specific manual for model under repair.
Model Service Manual CD Mechanism Module Mechanism Unit
DEH-P400/X1N/UC
DEH-P4000/X1N/UC CRT2308 CXK5200 CXB3100
DEH-P4050/X1N/ES
DEH-P3000R/X1N/EW CRT2309 CXK5200 CXB3100
DEH-P200/X1N/UC
DEH-P300/X1N/UC CRT2310 CXK5200 CXB3100
DEH-P3000/X1N/UC
DEH-P20/X1N/UC
DEH-P2000/X1N/UC CRT2311 CXK5200 CXB3100
DEH-P2050/X1N/ES
DEH-2000R/X1N/EW
DEH-2020R/X1N/GR CRT2312 CXK5200 CXB3100
DEH-2030R/X1N/EW
DEH-10/X1N/UC
DEH-1000/X1N/UC CRT2313 CXK5200 CXB3100
DEH-1050/X1N/ES
CONTENTS
1. CIRCUIT DESCRIPTIONS ...........................................2
2. MECHANISM DESCRIPTIONS.................................17
3. DISASSEMBLY .........................................................18
PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
PIONEER ELECTRONICS SERVICE INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.
PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER ELECTRONIC CORPORATION 1998 K-FZA. DEC. 1998 Printed in Japan
CX-916
1. CIRCUIT DESCRIPTIONS
The LSI (UPD63710GC) used on this unit comprises five main blocks ; the pre-amp section, servo, signal processor,
DAC and CD text decoder (not used on this model). It also equips with nine automatic adjustment functions.
1.1 PRE-AMP SECTION
This section processes the pickup output signals to EFM 71
create the signals for the servo, demodulator and ASY 72
control.
The pickup output signals are I-V converted by the pre-
amp with the built-in photo-detector in the pickup, then RFI 74 EFM
Vref
added by the RF amp to obtain RF, FE, TE, TE zero cross
AGCO 75
and other signals. PEAK DET.
MIRR
AGCI 76 To the
This pre-amp section is built in the servo LSI Vref BOTTOM DET.
following stage
RFO 77 DEFECT of the LSI
UPD63710GC (IC201). The following describes function
EQ2 78 S/H LPF A3T
of each section.
EQ1 79 Vref 73 C-3T
Since this system has a single power supply (+5V), the Vref
Vref
FOK
RF- 80
reference voltage for this LSI and pickup are set to Vref
91 FEO
REFO (2.5V). The REFO is obtained by passing the Vref
90 FE-
A 82 Vref
REFOUT from the LSI through the buffer amplifier. The C 83
A/D
Vref
REFO is output from Pin 89 of this LSI. All D/A
B 84
measurements are done using this REFO as reference. D 85 Vref
93 TEO
Vref
Note : During the measurement, do not try to short the 92 TE-
F 86 Vref
A/D
REFO and GND. Vref 94 TE2
D/A
Vref
E 87
Vref
98 LD
PD 97
VREG
GND
APN
LDON
1) APC Circuit (Automatic Power Control) PN 99
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