Bell System 554A Bedienungsanleitung

BELL SYSTEM PRACTICES Plant Series SECTION 502-510-100 Issue 6, December 1967 AT&TCo Standard TELEPHONE SETS 500, 501, 554, AND 556 TYPES IDEN

SECTION 502-51 0-100 TABLE B (Cont) TROUBLES, PROBABLE CAUSES, AND CORRECTIVE MEASURES TROUBLE PROBABLE CAUSE Open induction coil. No Dial Tone or Set

K TERMINAL A TERMINAL Fig. 22-Replacing Capacitor Fig. 23-Removing Handhold Cover Clean bosses on operating bracket arms, spring anchor points, op

SECTION 502-51 0-1 00 (d) 584C Key (500U and 501 U telephone sets only) - P-484725 knob may be replaced by removing P-356367 setscrew (use jeweler

Fig. 30-Retainer Ring Mounting in Set Housing ISS 6, SECTION 502-510-100 Page 13 13 Pages

SECTION 502-510-100 TABLE A TELEPHONE SET COMPONENT PARTS COMPONENT -----,-------~ ---·-----~----r---~ SET CODE APP BLK§ MTG ELECTRON HOUSING DIAL NET

Fig. 3-500H, P, or 501 P Telephone Set Fig. 4-500U or 501 U Telephone Set Fig. 5-SOOW /Y Telephone Set ISS 6, SECTION 502-510-100 Fig. 6-5548 or 5568

SECTION 502-51 0-100 Fig. 7-SOOF oi 501 F Telephone Set, Plunger Switch • With set off hook, only the receiver is bridged on the line as a monitor

• 554- and 556-type sets-designed as handset hanger (Fig. 9). (1) Removal • Push inward on tab of snap fastener (Fig. 10) located in handset

SECTION 502-510-1 00 (b) Mounting Wall Sets • Several holes are provided in the baseplate for more flexibility in mounting to minimize backboard us

SELF-TAPPING FIL HO SCREWS NO. 6-20 X 5/16 CLAMPING BRACKET SCREW HOLE USED WHEN MOUNTING APPARATUS BLANK TO WALL-TYPE TELEPHONE SET 95 B APPARATUS B

SECTION 502-510-100 Fig. 20-95C Apparatus Blank on Dial Mounting Bracket in 554A/B Telephone Set 4. MAINTENANCE 4.01 Inspect exterior and interior

ISS 6, SECTION 502-510-100 TABLE B TROUBLES, PROBABLE CAUSES, AND CORRECTIVE MEASURES TROUBLE PROBABLE CAUSE CORRECTIVE MEASURE Ringer disconnected o