Pioneer KEH-P2030 Service Manual - Page 37

Tuner UnitCZW5534

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5 6 7 8 - Tuner Unit(CZW5534) A B C No. Symbol I/O Explain 1 AM ANT IN I AM antenna input Hight impedance. Connect to the antenna through an antenna circuit of receiver set. 2 FM ANT IN I FM antenna input 75Ω . Surge absober is necessary. 3 GND RF ground Ground for the antenna section. 4 AM Lo/Dx I AM local /distance Lo: 5V / Dx: open 5 FM Lo/Dx I FM local / distance Lo: ground / Dx: open 6 FM/AM VCC FM / AM power supply FM/AM section power supply. DC +8.2V D 7 FM VCC FM power supply FM RF and band switch section power supply. DC +8.2V 8 GND FE ground Ground for the front end section. 9 GND FM IF/ AM ground Ground for the FM IF/AM section. 10 N.C Not used. 11 FM/AM Vt I Tuning voltage Connect to the PLL circuit. 12 FM/AM OSC BUFF O OSC buffer output Connect to the PLL circuit. 13 L OUT O L channel output FM stereo L-ch signal output or AM audio output. 14 R OUT O R channel output FM stereo R-ch signal output or AM audio output. 15 FM/AM SD OUT O Station detector High when signals are received. To be pulled up +5V at 100kΩ FM ST IND/MONO Stereo indicator out ON when 16pin SD/IF request normal 0V(seek stop). E 16 FM/AM VSM O Signal meter output Received FM/AM signal level (strength) output. 17 FM/AM IF COUNT OUT I/O IF count output ON when signals are received at seeking. SD / IF request in 18 N.C Not used. F KEH-P2030/XM/UC 37 5 6 7 8

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KEH-P2030/XM/UC
-
Tuner Unit(CZW5534)
No. Symbol
I/O
1 AM ANT IN
I
AM antenna input
Hight impedance. Connect to the antenna through
an antenna circuit of receiver set.
2 FM ANT IN
I
FM antenna input
75
Ω
. Surge absober is necessary.
3 GND
RF ground
Ground for the antenna section.
4 AM Lo/Dx
I
AM local /distance
Lo: 5V
/ Dx: open
5 FM Lo/Dx
I
FM local / distance
Lo: ground / Dx: open
6 FM/AM VCC
FM / AM power supply FM/AM section power supply. DC +8.2V
7 FM VCC
FM power supply
FM RF and band switch section power supply. DC +8.2V
8 GND
FE ground
Ground for the front end section.
9 GND
FM IF/ AM ground
Ground for the FM IF/AM section.
10 N.C
Not used.
11 FM/AM Vt
I
Tuning voltage
Connect to the PLL circuit.
12 FM/AM OSC BUFF
O
OSC buffer output
Connect to the PLL circuit.
13 L OUT
O
L channel output
FM stereo L-ch signal output or AM audio output.
14 R OUT
O
R channel output
FM stereo R-ch signal output or AM audio output.
15 FM/AM SD OUT
O
Station detector
High when signals are received. To be pulled up +5V at 100k
Ω
FM ST IND/MONO
Stereo indicator out
ON when 16pin SD/IF request normal 0V(seek stop).
16 FM/AM VSM
O
Signal meter output
Received FM/AM signal level (strength) output.
17 FM/AM IF COUNT OUT
I/O
IF count output
ON when signals are received at seeking.
SD / IF request in
18 N.C
Not used.
Explain