
CDX-GT21W/GT210/GT260/GT260S 
SECTION 4
DIAGRAMS
4-1.  BLOCK DIAGRAM — MAIN SECTION —
J901
AUX
J1
(ANTENNA)
R-CH
TU1
(TUNER UNIT)
1 ANT  | 4  | |
  | 3  | 
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AUDIO 8.3V  | 
  | 10  | VCC (8.3V)  | 
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TU+5V  | 
  | 11  | 
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B.U 3.3V  | 
  | 15  | QUALITY  | 5  | |
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  | 16  | |
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AUX BUFFER
IC901
3  | +  | 
14  | +  | 
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10  | +  | 
QUALITY
VSM
TUATT
ELECTRONIC VOLUME
IC401
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  | POWER AMP/MULTIPLE  | 
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1  | 10   | 
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  | VOLTAGE REGULATOR  | 
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7  | 
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  | IC750  | 
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  | CN601  | 
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12  | 20 FIL  | 
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13  | 
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  | 12   | 5  | 
  | 1  | FL+  | ||||||
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8  | 8  | DN1  | 
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  | 11   | 3  | 
  | FL–  | |||||
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  | 9  | DN2  | 
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  | 2  | RL+  | ||||
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  | MUTE  | MUTE  | 
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  | 7  | 
  | 10 RL–  | |||||||
  | 4  | 
  | Q441  | Q461  | 
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3  | MUTE  | 16  | VOLATT  | 
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  | SCL  | 17  | 
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  | 12  | ||
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  | SDA 18  | 
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  | 3  | FR–  | ||||
  | 6  | 
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  | D479  | 
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  | 11 RR+  | ||
5  | 
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  | MUTE DRIVE  | 
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  | RR–  | |||
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  | BATT  | 
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  | Q478,479  | 
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  | 4  | SCL  | 
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  | 6   | ||||
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  | SYSTEM CONTROL  | 
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  | 2  | SDA  | 
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  | IC501 (1/2)  | 
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  | FU601  | 16 BATT  | ||
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  | I2C_CKO 33  | 
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  | VP 35  | 
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  | 38  | QUALITY  | I2C_SIO  | 34  | 
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  | BATT  | 
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  | D511  | 
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  | 39  | VSM  | VOL ATT  | 9  | 
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  | B.UP+B 37  | B.U+3.3V  | 
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  | 12  | TU ATT  | 
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  | BU 3.3V  | 
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  | 25  | EEP_CKO  | ATT  | 86  | 
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  | AUDIO8.3V 30  | AUDIO 8.3V  | 
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  | BEEP  | 5  | 
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  | 16 BEEP  | 
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  | 24  | EEP_SIO  | 
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  | SERVO3.3V 31  | SERVO3.3V  | 
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  | AMPSTB 26  | 
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  | 22 STB  | 
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  | MECHA6V 33  | MECHA6V  | 
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  | DIAG  | 8  | 
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  | 25 DIAG  | PANEL+B 34  | PANEL+B  | 
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CD
MECHANISM
UNIT
CNP301
11 AU_LCH
15AU_RCH
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R-CH
22UNI_SO
24UNI_SI
26UNI_CLK
16Z_MUTE
5 CD_ON
7 CDM_ON
6SYS_RST
21 EJECT_OK
27 BUS_ON
9A_ATT
25 BU_IN
18  | D_3.3V  | SERVO 3.3V  | |||
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19  | A_3.3V  | 
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  | 8  | BU_3.3V  | 
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1,2  | DR_6V  | ||||
MECHA 6V  | |||||
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  | ACC DETECT  | 
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ACC_IN 72  | 
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  | ACC  | ||||||
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  | Q631  | 
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TEST IN  | 73  | 
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  | TEST  | |||
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  | D580  | BATT  | 
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  | BU IN  | 54  | 
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  | BATTERY LEVEL CHECK  | 
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  | D581  | TU+5V  | 
  | TU+5V REG  | 
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  | AUDIO 8.3V  | 
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  | Q1,D1  | 
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D512
59 UNISO 
 58 UNISI
60UNISCK
93  | •   | ||
98  | CD_ON  | • Signal Path  | |
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99  | CDM_ON  | : CD PLAY  | |
D510  | 
  | : FM  | |
77  | RESET  | ||
: AM/MW/SW  | |||
88  | SYSRST  | ||
  | |||
87  | BUSON  | : AUX  | |
  | RESET  | 
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  | IC602  | 
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1  | VOUT VDD 2  | BU 3.3V  | 
19 19