Knb-17A (Ni-Cd Battery); Charger); Rapid Charger) - Kenwood TK-290 Service Manual

TERMINAL FUNCTION / KNB-17A (Ni-Cd BATTERY)
CN No. Pin No. Name I/O
26 NC – Not use.
27 KCK I Key scan IC clock data input.
28 KRS I Key scan IC reset input.
29 INAFC I Internal speaker switch input.
30 EXAFC I External speaker switch input.
31 AMPSW I Audio AMP control switch input.
32 OPPTT I For optional board. (See page 22.)
33 TCONT I For optional board. (See page 22.)
CN2 1 AFE – Audio GND.
for X57 2 AFE – Audio GND.
CN3 1 Q8 O Key scan IC Q8 signal output.
2 Q7 O Key scan IC Q7 signal output.
3 PTTE – PTT GND.
4 PTT I Normally : 5V, transmit when connected GND.
5 KI1 I Key input.
6 Q6 O Key scan IC Q6 signal output.
CN4 1 + – BTL + output for internal speaker.
2 – – BTL – output for internal speaker.
CONTROL UNIT (X53-3930-XX) (B/6)
CN101 1 E – GND.
2 TOGGLE O Normally : 5V, switched toggle when
for connected GND.
X57 3 KI2 O Key output.
4 Q6 I Key scan IC Q6 signal input.
5 Q7 I Key scan IC Q7 signal input.
6 CE I Chip select input for LCD driver.
7 CL I Clock data input for LCD driver.
8 DI I Data input for LCD driver.
9 LAMP – Backlight LED control.
Normally : 0V, Lighting : 7.5V
10 TX LED – TX LED control.
Normally : 0V, Lighting : 7.5V
11 BLED – Busy LED control.
Normally : 0V, Lighting : 7.5V
12 5M – 5V.
KNB-17A External View
Function
KNB-17A Circuit Diagram
KNB-17A Specifications
Voltage ....................................... 7.2V (1.2V x 6)
Charging current ........................ 1500mAh
Dimensions (mm) ...................... 58.0 W x 110.8 H x 20.0 D
Charger and charging time
Weight ....................................... 220g
Discharge pin side
+
Breaker Breaker
(70±5°C) (80±5°C)
Diode
Thermister
+
Charge pin side
(Projections included)
KSC-19 (Normal Charger) ...... Approx. 8 hours
KSC-20 (Rapid charger) ......... Approx. 1.3 hour
TK-290
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