Service Precautions - Pioneer CX-3250 Service Manual

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1. SERVICE PRECAUTIONS

1.1 SERVICE PRECAUTIONS
A
1. You should conform to the regulations governing the product (safety, radio and noise, and other regulations),
and should keep the safety during servicing by following the safety instructions described in this manual.
2. Be careful in handling ICs. Some ICs such as MOS type are so fragile that they can be damaged by electrostatic
induction.
3. Before disassembling the unit, be sure to turn off the power. Unplugging and plugging the connectors during
power-on mode may damage the ICs inside the unit.
4. To protect the pickup unit from electrostatic discharge during servicing, take an appropriate treatment
(shorting-solder) by referring to "the DISASSEMBLY" .
5. After replacing the pickup unit, be sure to skew adjustment.
6. During disassembly, be sure to turn the power off since an internal IC might be destroyed when a connector
B
is plugged or unplugged.
7. Notes on the temperature protection
The temperature protection is set considering the use temperature range of eNAND.
If the temperature reaches the detection temperature shown below, the operation stops (ASENS is disabled).
Detection temperature on low temperature side: -25°C, return temperature: -20°C
Detection temperature on high temperature side: 86.5°C, return temperature: 80°C
8. Control of FAN
There is the control of STOP, low rotation and high rotation.
The temperature (eNAND, DVD mechanism) are detected and controlled it.
9. Pay attention to the wiring of BT cable. (It affects the sensitivity of BT antenna)
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10. Some parts which are different from the Circuit symbol are mounted on the AV unit and CC Monitor unit.
Unit Name
AV unit
CC Monitor unit
11. The part listed below is difficult to replace as a discrete component part.
When the part listed in the table is defective, replace whole Assy.
D
AV UNIT DD Converter
GPS
IF UNIT
DD Converter
Prima
CODEC
eNAND
CC MONITOR
T-CON
UNIT
SRAM
FLASH ROM
B/L Controller
iPod
E
VIDEO DECODER
12. Attach the Detach Grill Assy (Front Panel) to the product to turn on the unit.
F
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Circuit Symbol and No.
R2428, R2430
R2443
L5695-L5715
R4143, R4291, R4299, R4303-R4304, R4317, R4320-R4329
R4824, R5738, R5740-R5745, R5747-R5757
IC1281 LT3505EDD
IC151 GRF3I-0336S
IC4204, LTC3412AEFE
IC4205
IC4001 TT4421
IC4654 WM1616LGEFL
IC4501 PEN002A
IC4901 TC90192XBG
IC4406 CY62147EV30LL45BVA
IC4403 CXX3406
IC5508 OZ9990IRN
Authentication
IC IC4701 341S2162
IC5513 AK8859VN
AVIC-X930BT/XNUC
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Mounted parts
Capacitor
Inductor
Resistor
Inductor
(Ferrite beads)
Heat pad
Heat pad
Heat pad
BGA
Terminal is bent inside
BGA
BGA
BGA
BGA
Land at the bottom of IC
Terminal is bent inside
Terminal is bent inside
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