DOWNLOAD Panasonic KX-T7730RU (serv.man4) Service Manual ↓ Size: 912.7 KB | Pages: 22 in PDF or view online for FREE

Model
KX-T7730RU (serv.man4)
Pages
22
Size
912.7 KB
Type
PDF
Document
Service Manual / Supplement
Brand
Device
PBX / PROPRIETARY TELEPHONE
File
kx-t7730ru-sm4.pdf
Date

Panasonic KX-T7730RU (serv.man4) Service Manual / Supplement ▷ View online

10
KX-T7730RU
1.5.
CIRCUIT OPERATIONS
1.5.1.
KEY INPUT CONTROL CIRCUIT
Change from the Original Service Manual Section 7.1.
Sequential input information is executed by dynamic scanning.
The ports P3_1, P3_6, P8_4~6, P8_1 of IC1 are brought to hifh status consecutively.
If a key is pressed, the key-in information input is executed by ports P2_1~7, P6_1~2.
11
KX-T7730RU
1.5.2.
LED CIRCUIT
Change from the Original Service Manual Section 7.2.
Circuit Operation:
The LED executes dynamic lighting for the status indicators, and control is executed by the output ports P3_1, P3_6, P8_5~6,
P4_5, P1_1~7.
12
KX-T7730RU
1.5.3.
DATA COMMUNICATION CIRCUIT
Change from the Original Service Manual Section 7.3.
1) Reception
The data from the PBX is received via the H and L lines along the path shown below.
H, L Line 
→ D2 → T2 → R106 → Q102 → IC9 → IC1 Pin 19
2) Transmission
The data to the proprietary telephone is transmitted along the following path.
IC1 Pin 16 
→ Q101 → T2 → D2 → H, L Line
13
KX-T7730RU
1.5.4.
TONE GENERATION CIRCUIT
Change from the Original Service Manual Section 7.4.
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