KX-TU301EXME - Panasonic Telephone Service Manual (repair manual). Page 44

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1. RTL (Retention Time Limited)

The marking (RTL) indicates that the Retention Time
is limited for this item.
When production is discontinued, this item will
continue to be available only for a specific period of
time.
This period of time depends on the type of item, and
the local laws governing parts and product retention.
At the end of this period, the item will no longer be
available.

2. Important safety notice

Components identified by the   mark indicates special
characteristics important for safety. When replacing any
of these components, only use specified manufacture’s
parts.

3. The S mark means the part is one of some identical parts.

For that reason, it may be different from the installed part.

4. ISO code (Example: ABS-94HB) of the remarks column

shows quality of the material and a flame resisting grade
about plastics.

5. RESISTORS & CAPACITORS

Unless otherwise specified;
All resistors are in ohms (

Ω) K=1000 Ω, M=1000 kΩ

All capacitors are in MICRO FARADS (

µF)P=µµF

*Type & Wattage of Resistor

(*1) When replacing the Handset LCD, See How to
Replace the Handset LCD (P.26).

Type

ERC:Solid
ERDS:Carbon
ERJ:Chip

ERX:Metal Film
ERG:Metal Oxide
ER0:Metal Film

PQ4R:

Chip 

ERS:Fusible Resistor
ERF:Cement Resistor

Type

ECFD:Semi-Conductor
ECQS:Styrol
ECUV,

PQCUV,ECUE:Chip

ECQMS:Mica

ECCD,ECKD,ECBT,F1K,ECUV:Ceramic
ECQE,ECQV,ECQG:Polyester
ECEA,ECST,EEE:Electlytic
ECQP:Polypropylene 

Wattage

*Type & Voltage Of Capacitor

10,16:1/8W

14,25:1/4W

12:1/2W

1:1W 2:2W 3:3W

Voltage

ECQ Type ECQG

ECQV Type

05:50V
  1:100V
  2:200V

ECSZ Type

0J     :6.3V
1A     :10V
1C     :16V
1E,25:25V

1V     :35V
50,1H:50V
1J      :16V
2A      :100V

0F:3.15V
1A:10V
1V:35V
0J:6.3V

Others

1H:50V
2A:100V
2E:250V
2H:500V